JP2021131153A - Power transmission device - Google Patents

Abstract

To transmit power of one of power sources to drive wheels in a state where one of three rotating elements included in a differential device is fixed to a fixed member.SOLUTION: In a power transmission device: any one of three rotating elements possessed by a differential device, is selectively fixed to a fixed member; a second power source is connected, among the three rotating elements, to the rotating element other than the rotating element that is fixed to the fixed member by a connection switching device; and the differential device is switched between a first mode in which any one of the three rotating elements is connected to an input shaft by the connection switching device, one of the remaining rotating elements is fixed to the fixed member and the other is connected to a first output shaft, and a second mode in which the three rotating elements are connected to the second power source, the first output shaft, and a second output shaft, respectively.SELECTED DRAWING: Figure 2

Description

The present invention relates to a power transmission device.

As a power transmission device mounted on a vehicle, a transfer is known in which power from an engine (first power source) is distributed and transmitted to front wheels and rear wheels. The output side of the transfer is connected to the front wheel propeller shaft and the rear wheel propeller shaft. Then, in the transfer, it is possible to switch between a two-wheel drive state in which power is output to only one propeller shaft and a four-wheel drive state in which power is output to both propeller shafts.

In Patent Document 1, in a transfer provided with an auxiliary power source (second power source) in the transfer case, the power output from the second power source is transmitted to the front wheels via one planetary gear device (differential device). And transmission to the rear wheels is disclosed. In the configuration described in Patent Document 1, the differential device functions as a transmission by fixing one of the three rotating elements included in the differential device to the transfer case (fixing member). 1 The rotation of the power source can be changed by a differential device and transmitted to the output member.

International Publication No. 2010/141682

When fixing the rotating element of the differential device while connecting the two power sources to the differential device, the rotating element that can be fixed to the fixing member and one of the power sources are connected as in the configuration described in Patent Document 1. In a power transmission device having the same configuration as the rotating element, the power of the two power sources cannot be transmitted to the output shaft.

The present invention has been made in view of the above circumstances, and drives the power of one of the power sources in a state where one of the three rotating elements included in the differential device is fixed to the fixing member. It is an object of the present invention to provide a power transmission device capable of transmitting to a wheel.

According to the present invention, an input shaft for inputting power from a first power source, a second power source, a first output shaft for transmitting power to a first drive wheel, and a second for transmitting power to a second drive wheel. An output shaft, a differential device having three rotating elements, a connection switching device that selectively switches the connection relationship between the input shaft, the first output shaft, the second output shaft, and the three rotating elements. The connection switching device is a power transmission device configured to selectively fix any one of the three rotating elements to the fixing member, and the second power source is Of the three rotating elements, the differential device is connected to a rotating element other than the rotating element fixed to the fixing member by the connection switching device, and the differential device can be switched to a plurality of modes by the connection switching device. In the plurality of modes, one of the three rotating elements is connected to the input shaft, and one of the remaining rotating elements is fixed to the fixing member, and the other. A first mode in which is connected to the first output shaft, and a second mode in which the three rotating elements are connected to the second power source, the first output shaft, and the second output shaft, respectively. It is characterized by including.

According to this configuration, with respect to the power transmission device provided with the second power source, the second power source is included in the rotating elements other than the rotating elements fixed to the fixing member among the three rotating elements constituting the differential device. It is connected. As a result, when power is transmitted with one rotating element fixed to the fixed member, the power of the second power source can be transmitted to the first output shaft and the second output shaft.

Further, an input shaft that inputs power from the first power source, a motor that functions as a second power source, a first output shaft that transmits power to the main drive wheels, and a second that transmits power to the auxiliary drive wheels. A planetary gear device having an output shaft and three rotating elements, a speed change state in which the rotation of the input shaft is changed by the planetary gear device and transmitted to the first output shaft, and the rotation of the input shaft is not changed. A shift switching unit that switches between a non-shift state transmitted to the first output shaft, a non-distributed state that transmits power only to the first output shaft of the first output shaft and the second output shaft, and a non-distributed state. A distribution switching unit for switching between a distribution state for transmitting power to the first output shaft and the second output shaft is provided, and when the shift switching unit is in the shift state, of the three rotating elements. It is a transfer configured to fix any one of the rotating elements to the fixed member, and the motor is a rotation of the three rotating elements other than the rotating element fixed to the fixed member by the shift switching unit. Connected to the element, the planetary gear device can be switched to a plurality of modes by the shift switching unit and the distribution switching unit, and the plurality of modes are two rotating elements out of the three rotating elements. In a third mode in which are connected to each other and one of the rotating elements is connected to the first output shaft, and one of the three rotating elements is connected to the input shaft and the rest. A first mode in which one of the rotating elements of the above is fixed to the fixing member and the other is connected to the first output shaft, and the three rotating elements are the motor and the first output shaft. And a second mode connected to the second output shaft, respectively, may be included.

According to this configuration, when one of the three rotating elements included in the planetary gear device is connected to the fixing member and the main drive wheel is driven by the power of the first power source, the power of the motor is used. Can be transmitted to the main drive wheels.

Further, the three rotating elements include a first rotating element, a second rotating element, and a third rotating element connected to the motor, and the shift switching unit switches the connection destination of the input shaft. The input switching member has an input switching member, and the input switching member is between a first input state in which the input shaft is connected to the first rotating element and a second input state in which the input shaft is directly connected to the first output shaft. When the planetary gear device enters the third mode and the three rotating elements rotate integrally, the input switching member enters the second input state and the input shaft is directly connected to the first output shaft. The planetary gear device is in the first mode, the first rotating element is an input element, the second rotating element is a reaction force element fixed to the fixing member, and the third rotating element is connected to the first output shaft. In the case of the output element, the input switching member is in the first input state, the input shaft is connected to the first rotating element, the planetary gear device is in the second mode, and the three rotating elements are in the first input state. When differentially possible, the input switching member may be in the second input state and the input shaft may be directly connected to the first output shaft.

According to this configuration, the power transmission path for transmitting the power of the input shaft to the planetary gear device and the power transmission path for transmitting the power of the input shaft to the first output shaft by the input switching member without going through the planetary gear device. And can be switched.

Further, a transmission unit for transmitting power to the second output shaft is further provided, and the distribution switching unit includes a first distribution switching member that selectively connects the first output shaft to the transmission unit, and the second rotation. When the first distribution switching member has a second distribution switching member that selectively connects the element or the third rotating element to the transmission unit, and the first distribution switching member connects the first output shaft to the transmission unit. A first distribution state in which the second rotating element is connected to the first output shaft, and a first in which the second rotating element is connected to the first output shaft when the first output shaft is not connected to the transmission unit. The second distribution switching member switches between a non-distributed state and a second non-distributed state in which the third rotating element is connected to the first output shaft when the first output shaft is not connected to the transmission unit. Is a member that also functions as the shift switching unit, and includes an integrated state in which the second rotating element and the third rotating element are connected, and a fixed state in which the third rotating element is connected to the fixing member. , The second distribution switching state is switched between the second rotation element and the second distribution state connected to the transmission unit, and the shift switching unit is an engagement device having the second distribution switching member as an engagement element, and the second distribution switching member is used as an engagement element. It may be switched between an engaged state in which the distribution switching member is connected to the fixing member and an released state in which the second distribution switching member is rotatably released.

According to this configuration, the first distribution switching member and the second distribution switching member transmit the power of the input shaft only to the first output shaft in a non-distributed state, and a part of the power transmitted to the first output shaft. Can be switched between the distribution state and the distribution state in which is distributed to the transmission unit.

Further, when the second distribution switching member is in the fixed state and the planetary gear device is in the first mode, the input switching member switches between the first input state and the second input state. The first distribution switching member can switch between the first distribution state and the first non-distribution state, and when the planetary gear device enters the first mode. When the input switching member is in the first input state and the first distribution switching member is in the first distribution state, the power from the first power source and the power of the motor are the planetary gears. It is distributed to the main drive wheel and the sub drive wheel via the device, and the rotation of the input shaft and the rotation of the motor are changed by the planetary gear device and transmitted to the main drive wheel and the sub drive wheel. The first drive state may be set.

According to this configuration, the power of the motor can be transmitted to the main drive wheels via the planetary gear device set in the first mode.

Further, when the planetary gear device is in the first mode, the input switching member is in the second input state, and the first distribution switching member is in the first non-distribution state, the first The power from the power source is directly transmitted from the input shaft to the first output shaft, and the power of the motor is transmitted to the first output shaft via the planetary gear device, and the first The power from the power source and the power of the motor may be in the second drive state in which the power is not transmitted to the second output shaft.

According to this configuration, the power of the motor can be transmitted to the main drive wheels via the planetary gear device set in the first mode.

When the planetary gear device is in the third mode and the three rotating elements rotate integrally, the first distribution switching member is in the first distribution state, the first non-distribution state, and the second non-distribution state. It may be possible to switch between.

According to this configuration, the connection relationship of the first distribution switching member can be switched while the planetary gear device is set to the third mode.

When the planetary gear device is in the second mode and the three rotating elements are differentially capable, the first distribution switching member is in the second non-distribution state, and the second distribution switching member is in the second distribution switching member. It may be in the second distribution state.

According to this configuration, the first distribution switching member can be set to the second non-distribution state and the second distribution switching member can be set to the second distribution state while the planetary gear device is set to the second mode.

Further, a transmission unit for transmitting power to the second output shaft is further provided, and the shift switching unit is in an engaged state in which the third rotating element is used as an engaging element and the third rotating element is connected to the fixing member. The first engaging device that switches between the third rotating element and the released state that rotatably releases the third rotating element, and the second rotating element and the third rotating element as engaging elements, and the second rotating element. A second engaging device that switches between an engaged state in which the third rotating element is engaged and an released state in which the second rotating element is rotatably released relative to the third rotating element. The distribution switching unit has a distribution switching member that switches between a first distribution state in which the first output shaft is connected to the transmission unit and a second distribution state in which the third rotating element is connected to the transmission unit. You may have.

According to this configuration, it is possible to configure a transfer having a shift switching unit having a first engaging device and a second engaging device.

When the planetary gear device is in the second mode and the three rotating elements are differentially capable, the first engaging device is in the released state and the second engaging device is in the released state. The distribution switching member may be in the second distribution state which is not connected to the first output shaft.

According to this configuration, with the planetary gear device set to the second mode, the first engaging device can be released, the second engaging device can be released, and the distribution switching member can be put into the second distribution state. can.

Further, when the planetary gear device is in the first mode, the first engaging device is in the engaged state and the third rotating element is connected to the fixing member, and the second engaging device is said. The second rotating element may be in the released state so that the second rotating element can be rotated, and the distribution switching member may be in the first distribution state which is not connected to the third rotating element.

According to this configuration, the planetary gear device can be set to the first mode by engaging the first engaging device, and the distribution switching member can be put into the first distribution state.

Further, a transmission unit for transmitting power to the second output shaft is further provided, and the three rotating elements are connected to the first rotating element, the second rotating element, and the motor connected to the input shaft. The shift switching unit includes a third rotating element, the second rotating element is used as an engaging element, the second rotating element is connected to the fixing member, and the second rotating element is rotated. The first engaging device that switches between the released states that can be released, the second rotating element and the third rotating element are used as engaging elements, and the second rotating element and the third rotating element are engaged with each other. The distribution switching unit includes a second engaging device that switches between an engaging state in which the third rotating element is engaged and an released state in which the third rotating element is rotatably released relative to the second rotating element. A member that also functions as an input switching unit that switches the connection destination of the input shaft, the first distribution switching member that selectively connects the input shaft or the transmission unit to the first output shaft, and the second rotation. It may have a second distribution switching member that selectively connects the element or the third rotating element to the transmission unit.

According to this configuration, it becomes possible to apply a planetary gear device in which a motor is connected to a third rotating element to a transfer.

When the planetary gear device is in the second mode and the three rotating elements are differentially capable, the first engaging device is in the released state and the second engaging device is in the released state. The first distribution switching member is in a non-distribution state in which the input shaft is directly connected to the first output shaft without being connected to the transmission unit, and the second distribution switching member is attached to the third rotating element. The first distribution state may be obtained in which the second rotating element is connected to the transmission unit without being connected.

According to this configuration, the power of the motor can be transmitted to the drive wheels even when the motor is connected to the third rotating element.

Further, when the planetary gear device is in the first mode, the first engaging device is in the engaged state and the second rotating element is connected to the fixing member, and the second engaging device is said. In the released state, the third rotating element is rotatable, and the first distribution switching member is in the second distribution state in which the first output shaft is connected to the transmission unit without being connected to the input shaft. The two-distribution switching member may be in a third distribution state in which the third rotation element is connected to the transmission unit without being connected to the second rotation element.

According to this configuration, the power of the motor can be transmitted to the drive wheels even when the motor is connected to the third rotating element.

Further, a transmission unit for transmitting power to the second output shaft is further provided, and the three rotating elements include a first rotating element, a second rotating element, and a third rotating element connected to the motor. Including, the shift switching unit has an input switching member that selectively connects the input shaft to the first rotating element, and the distribution switching unit also functions as an input switching unit that switches the connection destination of the input shaft. A first distribution switching member that selectively connects the first output shaft to the transmission unit, and a second distribution switching member that selectively connects the second rotating element to the transmission unit. When the first output shaft is connected to the transmission unit, the first distribution switching member connects the second rotating element to the first output shaft without connecting to the input shaft. The first distribution switching member is switched between a one-distribution state and a non-distribution state in which the input shaft is connected to the first output shaft when the first output shaft is not connected to the transmission unit. An integrated state in which the two rotating elements and the third rotating element are connected, a fixed state in which the third rotating element is connected to the fixing member, and a second distribution state in which the second rotating element is connected to the transmission unit. The shift switching unit is an engaging device having the second distribution switching member as an engaging element, and the engaging state in which the second distribution switching member is connected to the fixing member and the first 2 The distribution switching member may be switched between the released state and the rotatably released state.

According to this configuration, the connection relationship between the input shaft and the first output shaft can be switched by the first distribution switching member.

Further, when the second distribution switching member is in the fixed state and the planetary gear device is in the first mode, the input switching member is in the first input state in which the input shaft is connected to the first rotating element. The first distribution switching member may be in the first distribution state and the first output shaft may be connected to the transmission unit.

According to this configuration, the first distribution switching member can connect the first output shaft to the transmission unit even if the connection relationship between the input shaft and the first output shaft is switched by the first distribution switching member. ..

Further, when the planetary gear device is in the third mode and the three rotating elements rotate integrally, the input switching member is in a second input state in which the input shaft is not connected to the first rotating element, and the first When the distribution switching member is in the non-distribution state, the second distribution switching member is in the fixed state, and the planetary gear device is in the first mode, the input switching member rotates the input shaft in the first rotation. The first input state is connected to the element, the first distribution switching member is in the first distribution state, the first output shaft is connected to the transmission unit, the planetary gear device is in the second mode, and the three rotations are performed. When the elements are differential, the input switching member is in a second input state in which the input shaft is not connected to the first rotating element, the first distribution switching member is in the non-distribution state, and the second The distribution switching member may be in the second distribution state and the second rotating element may be connected to the transmission unit.

According to this configuration, the first distribution switching member can connect the first output shaft to the transmission unit even if the connection relationship between the input shaft and the first output shaft is switched by the first distribution switching member. ..

Further, the planetary gear device is a single pinion type planetary gear device, the first rotating element is a sun gear, the second rotating element is a carrier, and the third rotating element is a ring gear. You may.

According to this configuration, the planetary gear device can be configured by a single pinion type.

In the present invention, with respect to the power transmission device provided with the second power source, the second power source is connected to a rotating element other than the rotating element fixed to the fixing member among the three rotating elements constituting the differential device. ing. As a result, when power is transmitted with one rotating element fixed to the fixed member, the power of the second power source can be transmitted to the first output shaft and the second output shaft.

FIG. 1 is a skeleton diagram schematically showing a vehicle equipped with the power transmission device of the first embodiment. FIG. 2 is a skeleton diagram showing a case where the transfer of the first embodiment is in the first drive state. FIG. 3 is a collinear diagram showing the state of the rotating element in the planetary gear device in the first drive state. FIG. 4 is a skeleton diagram showing a case where the transfer of the first embodiment is in the second drive state. FIG. 5 is a collinear diagram showing the state of the rotating element in the planetary gear device in the second drive state. FIG. 6 is a skeleton diagram showing a case where the transfer of the first embodiment is in the third drive state. FIG. 7 is a collinear diagram showing the state of the rotating element in the planetary gear device in the third drive state. FIG. 8 is a skeleton diagram showing a case where the transfer of the first embodiment is in the fourth drive state. FIG. 9 is a collinear diagram showing the state of the rotating element in the planetary gear device in the fourth drive state. FIG. 10 is a skeleton diagram showing a case where the transfer of the first embodiment is in the fifth drive state. FIG. 11 is a collinear diagram showing the state of the rotating element in the planetary gear device in the fifth drive state. FIG. 12 is a skeleton diagram schematically showing a transfer in the power transmission device of the second embodiment. FIG. 13 is a skeleton diagram schematically showing a transfer in the power transmission device of the third embodiment. FIG. 14 is a skeleton diagram schematically showing a transfer in the power transmission device of the fourth embodiment. FIG. 15 is a skeleton diagram schematically showing a transfer in the power transmission device of the fifth embodiment. FIG. 16 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the second drive state. FIG. 17 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the third drive state. FIG. 18 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the fourth drive state. FIG. 19 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the fifth drive state. FIG. 20 is a skeleton diagram schematically showing the transfer in the first modification of the fifth embodiment. FIG. 21 is a skeleton diagram showing a case where the transfer in the first modification of the fifth embodiment is in the second drive state. FIG. 22 is a skeleton diagram schematically showing the transfer in the second modification of the fifth embodiment. FIG. 23 is a skeleton diagram schematically showing a transfer in the power transmission device of the sixth embodiment. FIG. 24 is a skeleton diagram showing a case where the transfer in the power transmission device of the sixth embodiment is in the second drive state. FIG. 25 is a skeleton diagram schematically showing the transfer in the first modification of the sixth embodiment. FIG. 26 is a skeleton diagram schematically showing the transfer in the second modification of the sixth embodiment. FIG. 27 is a skeleton diagram schematically showing a transfer in the power transmission device of the seventh embodiment. FIG. 28 is a collinear diagram showing the state of the rotating element in the planetary gear device when the second drive state is set in the seventh embodiment. FIG. 29 is a collinear diagram showing the state of the rotating element in the planetary gear device when the third drive state is set in the seventh embodiment. FIG. 30 is a collinear diagram showing the state of the rotating element in the planetary gear device in the case of the fifth drive state in the seventh embodiment. FIG. 31 is a skeleton diagram schematically showing the transfer in the first modification of the seventh embodiment. FIG. 32 is a skeleton diagram schematically showing the transfer in the second modification of the seventh embodiment.

Hereinafter, the power transmission device according to the embodiment of the present invention will be specifically described with reference to the drawings. The present invention is not limited to the embodiments described below.

FIG. 1 is a skeleton diagram schematically showing a vehicle equipped with the power transmission device of the first embodiment. The vehicle 1 includes an engine 2 as a power source, left and right front wheels 3L and 3R, left and right rear wheels 4L and 4R, and a power transmission device 10 that transmits the power of the engine 2 to the front wheels 3 and the rear wheels 4, respectively. , Is equipped. This vehicle 1 is a four-wheel drive vehicle based on front engine rear wheel drive. The rear wheel 4 is a main driving wheel that serves as a driving wheel during both two-wheel drive traveling and four-wheel drive traveling. On the other hand, the front wheels 3 are auxiliary drive wheels, which become driven wheels during two-wheel drive and drive wheels during four-wheel drive.

The power transmission device 10 includes a transmission 11 connected to the engine 2, a transfer 12 which is a front / rear wheel power distribution device connected to the transmission 11, and a front propeller shaft 13 and a rear propeller shaft connected to the transfer 12, respectively. 14, the front wheel differential gear mechanism 15 connected to the front propeller shaft 13, the rear wheel differential gear mechanism 16 connected to the rear propeller shaft 14, and the left and right front wheel axles connected to the front wheel differential gear mechanism 15. It includes 17L and 17R and left and right rear wheel axles 18L and 18R connected to the rear wheel differential gear mechanism 16. When the left and right wheels and axles are not particularly distinguished, the reference numerals L and R are omitted, and the terms are described as front wheel 3, rear wheel 4, front wheel axle 17, and rear wheel axle 18.

The power output from the engine 2 is transmitted to the transfer 12 via the transmission 11. Then, the power transmitted to the transfer 12 is sequentially transmitted from the transfer 12 to the rear wheels 4 via the rear propeller shaft 14, the rear wheel differential gear mechanism 16, and the rear wheel axle 18 on the rear wheel side. NS. A part of the power transmitted to the rear wheel 4 side is distributed to the front wheel 3 side by the transfer 12, and the power transmission path on the front wheel side of the front propeller shaft 13, the front wheel differential gear mechanism 15, and the front wheel axle 17 is sequentially followed. It is transmitted to the front wheel 3 via.

FIG. 2 is a skeleton diagram showing a case where the transfer of the first embodiment is in the first drive state. The transfer 12 of the first embodiment includes a transfer case 20 which is a non-rotating member. The transfer 12 is provided in the transfer case 20 to the input shaft 21, the rear wheel side output shaft 22 as the first output shaft for outputting power to the rear wheel 4 which is the main drive wheel, and the front wheel 3 which is the auxiliary drive wheel. It includes a front wheel side output shaft 23 as a second output shaft that outputs power, and a planetary gear device 24 as a transmission unit that shifts the rotation of the input shaft 21 and transmits it to the rear wheel side output shaft 22. Further, the transfer 12 is a transmission unit 25 that functions as an input unit to the front wheel side as a rotating member that forms a power transmission path on the front wheel side in the transfer case 20, and a drive that outputs power to the front wheel side output shaft 23. It includes a gear 26, a driven gear 27 integrally provided on the front wheel side output shaft 23, and a front wheel drive chain 28 that connects the drive gear 26 and the driven gear 27. Further, the transfer 12 includes a motor 30 that functions as a power source and a connection switching device 40 that switches the connection state of the rotating members in the transfer case 20.

The input shaft 21 is an input member that inputs the power from the engine 2 to the transfer 12. Power from the engine 2 is transmitted to the input shaft 21 via the transmission 11. For example, the input shaft 21 is spline-fitted to an output member (not shown) of the transmission 11.

The rear wheel side output shaft 22 is an output member that outputs power from the transfer 12 to the rear wheels 4. The rear wheel side output shaft 22 is a main drive shaft arranged on the same axis as the input shaft 21 and connected to the rear propeller shaft 14.

The front wheel side output shaft 23 is an output member that outputs power from the transfer 12 to the front wheels 3. The front wheel side output shaft 23 is an auxiliary drive shaft arranged on an axis different from the input shaft 21 and the rear wheel side output shaft 22 and connected to the front propeller shaft 13. The front wheel side output shaft 23 rotates as the drive gear 26 rotates. The drive gear 26 is connected to the transmission unit 25 so as to rotate integrally.

The transmission unit 25 is a rotating member that transmits power to the front wheel side output shaft 23. The transmission unit 25 is switched between a connected state in which the power of the rear wheel side output shaft 22 is transmitted and a disconnected state in which the power of the rear wheel side output shaft 22 is not transmitted by the connection switching device 40. The transmission unit 25 and the drive gear 26 are arranged so as to be rotatable relative to the rear wheel side output shaft 22. In the transfer 12, the transmission unit 25, the drive gear 26, and the planetary gear device 24 are arranged on the same rotation center as the rear wheel side output shaft 22.

The planetary gear device 24 is composed of a single pinion type planetary gear device having three rotating elements. The planetary gear device 24 functions as a speed change unit that shifts and outputs the rotation from the engine 2. As shown in FIG. 2, the planetary gear device 24 meshes with the sun gear S as three rotating elements, a carrier C that supports a plurality of pairs of pinion gears that mesh with each other so as to rotate and revolve, and the sun gear S via the pinion gears. It is equipped with a ring gear R. The sun gear S is a first rotating element that functions as an input element. A motor 30 that functions as a second power source is always connected to the sun gear S. The carrier C is a second rotating element that functions as an output element. The ring gear R is a third rotating element that functions as a reaction force element.

The connection destinations of the three rotating elements, the sun gear S, the carrier C, and the ring gear R, are selectively switched by the connection switching device 40. Rotating members that rotate integrally with each of these three rotating elements are connected to each other.

A first rotating member 51 that functions as an input unit of the planetary gear device 24 is connected to the sun gear S. The first rotating member 51 is a member that rotates integrally with the sun gear S and has input gear teeth 51a. A rotating member on the engine 2 side, which is the first power source, is connected to the input gear teeth 51a. Further, an input gear 33 to which power from the motor 30 is input is attached to the first rotating member 51. The input gear 33 and the first rotating member 51 rotate integrally.

A second rotating member 52 that functions as an output unit of the planetary gear device 24 is connected to the carrier C. The second rotating member 52 is a member that rotates integrally with the carrier C, and has a first output gear tooth 52a and a second output gear tooth 52b.

A third rotating member 53 that functions as an output unit of the planetary gear device 24 is connected to the ring gear R. The third rotating member 53 is a member that rotates integrally with the ring gear R, and has a first output gear tooth 53a and a second output gear tooth 53b.

The motor 30 is a motor generator (MG) capable of functioning as a motor and a generator. The motor 30 includes a rotor, a stator, and an output shaft that rotates integrally with the rotor, and is electrically connected to the battery via an inverter. As shown in FIG. 2, a reduction gear 31 is provided on the output shaft of the motor 30. The reduction gear 31 meshes with the counter gear 32. The counter gear 32 meshes with the input gear 33. A reduction gear train is formed by the reduction gear 31, the counter gear 32, and the input gear 33. Therefore, when the power output from the motor 30 is transmitted to the input gear 33 via the counter gear 32, the rotation of the motor 30 is speed-shifted (decelerated) and transmitted to the sun gear S.

The connection switching device 40 is a device that switches the connection state of the rotating members constituting the transfer 12. Specifically, the connection switching device 40 selectively switches the connection destinations of the first rotating member 51, the second rotating member 52, and the third rotating member 53 that rotate integrally with each rotating element of the planetary gear device 24. As shown in FIG. 2, the connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, and a third dog clutch 43.

The first dog clutch 41 is an engaging device that functions as an input switching unit and a shift switching unit. As shown in FIG. 2, the first dog clutch 41 selectively connects the input shaft 21 to the sun gear S or the rear wheel side output shaft 22. The first dog clutch 41 is a so-called high-low switching unit (shift switching unit), and is a shift state in which the rotation of the input shaft 21 is shifted by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22, and the rotation of the input shaft 21. Is switched to the direct connection state in which the gear is transmitted to the rear wheel side output shaft 22 without shifting. That is, the first dog clutch 41 transmits the power from the engine 2 to the rear wheel side output shaft 22 without passing through the planetary gear device 24, and the power from the engine 2 is transmitted to the planetary gear device 24. It switches between the second input state and the second input state transmitted to the rear wheel side output shaft 22 via the vehicle.

The first dog clutch 41 has a first switching sleeve 44 as an input switching member. The first switching sleeve 44 has a second gear tooth 44a that meshes with the gear tooth 21a of the input shaft 21 and a second gear tooth 51a that meshes with the first gear tooth 22a of the rear wheel side output shaft 22 or the input gear tooth 51a of the first rotating member 51. It has gear teeth 44b and. The first switching sleeve 44 is moved in the axial direction by the actuator of the first dog clutch 41. Then, in the first switching sleeve 44, in a state where the first gear tooth 44a is always meshed with the input shaft 21, the meshing partner of the second gear tooth 44b is one of the rear wheel side output shaft 22 and the first rotating member 51. Switch to either one. When the second gear tooth 44b meshes with the input gear tooth 51a of the first rotating member 51, the first dog clutch 41 is in a shifting state (second input state). On the other hand, when the second gear tooth 44b meshes with the first gear tooth 22a of the rear wheel side output shaft 22, the first dog clutch 41 is in a direct connection state (first input state).

The second dog clutch 42 is an engaging device that functions as a shift switching unit and a distribution switching unit. The second dog clutch 42 has a function of selectively fixing the ring gear R of the planetary gear device 24 to the fixing member 29 and a function of connecting the carrier C and the ring gear R so as to rotate integrally as a shift switching unit. The second dog clutch 42 has a function of connecting the carrier C, which is an output element, to the transmission unit 25 as a distribution switching unit. That is, in the second dog clutch 42, the ring gear R is mechanically fixed in a fixed state (shifting state), the carrier C and the ring gear R are integrated, and the carrier C is connected to the transmission unit 25. Switch between the distributed state (differential state). The fixing member 29 is the transfer case 20 itself or a non-rotating member integrated with the transfer case 20.

The second dog clutch 42 has a second switching sleeve 45 as a second distribution switching member. The second switching sleeve 45 includes a first gear tooth 45a that meshes with the first output gear tooth 52a of the second rotating member 52 that rotates integrally with the carrier C, and a first output gear of the third rotating member 53 that rotates integrally with the ring gear R. It has a second gear tooth 45b that meshes with the first input gear tooth 25a of the tooth 53a or the transmission unit 25, and a third gear tooth 45c that meshes with the fixing member 29. The second switching sleeve 45 is moved in the axial direction by the actuator of the second dog clutch 42. The second switching sleeve 45 connects the carrier C and the ring gear R in an integrated state in which the carrier C and the ring gear R are integrally rotatably connected, a fixed state in which the ring gear R is connected to the fixing member 29, and the carrier C and the transmission unit 25. It switches between the distribution state.

The third dog clutch 43 is an engaging device that functions as a distribution switching unit. The third dog clutch 43 selectively connects the rear wheel side output shaft 22 to the front wheel 3 side transmission unit 25. That is, the third dog clutch 43 distributes a part of the power transmitted to the rear wheel side output shaft 22 to the front wheel side output shaft 23, and outputs the power transmitted to the rear wheel side output shaft 22 to the front wheel side output. It switches between a non-distributed state that does not distribute to the shaft 23.

The third dog clutch 43 has a third switching sleeve 46 as a first distribution switching member. The third switching sleeve 46 has a second gear tooth 46a that meshes with the second gear tooth 22b of the rear wheel side output shaft 22 and a second gear tooth 52b that meshes with the second output gear tooth 52b of the second rotating member 52 that rotates integrally with the carrier C. It has a gear tooth 46b and a third gear tooth 46c that meshes with the second input gear tooth 25b of the transmission unit 25. The second gear tooth 46b and the third gear tooth 46c can mesh with the second output gear tooth 53b of the third rotating member 53 that rotates integrally with the ring gear R. The third switching sleeve 46 is moved in the axial direction by the actuator of the third dog clutch 43. Then, the third switching sleeve 46 connects the ring gear R or the carrier C to the rear wheel side output shaft 22, and selectively connects the rear wheel side output shaft 22 to the transmission unit 25. That is, the third switching sleeve 46 switches between a non-distributed state in which the rear wheel side output shaft 22 and the transmission unit 25 are not connected and a distributed state in which the rear wheel side output shaft 22 and the transmission unit 25 are connected.

In this way, the connection switching device 40 functions as an input switching unit, a shift switching unit, and a distribution switching unit. The input switching unit has a direct connection state in which the input shaft 21 is directly connected to the rear wheel side output shaft 22 (first input state) and a shift state in which the input shaft 21 is connected to the sun gear S of the planetary gear device 24 (second input state). To switch between. Since this input switching unit is a high-low switching unit, it is included in the gear shifting switching unit. The shift switching unit has a shift state in which the rotation of the input shaft 21 is changed and transmitted to the rear wheel side output shaft 22, and a non-shift state in which the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. To switch. Then, the distribution switching unit transmits the power input from the input shaft 21 to only the rear wheels 4 (two-wheel drive state) and the power input from the input shaft 21 to the front wheels 3 and the rear wheels 4. It switches between the distribution state (four-wheel drive state) that distributes and transmits.

By making the planetary gear device 24 function as a transmission unit, the transfer 12 establishes either the high-speed side transmission stage Hi or the low-speed side transmission stage Lo, shifts the rotation from the transmission 11 and transmits it to the rear stage. be able to. Further, when the transfer 12 is in the four-wheel drive state, the rotational differential between the rear propeller shaft 14 and the front propeller shaft 13 is not limited, and the rotational differential between them is limited. Switch between non-differential state. That is, in the transfer state, the rear wheel side output shaft 22 and the transmission unit 25 are in a differential state, and the rear wheel side output shaft 22 and the transmission unit 25 are in a non-differential state. And can be switched.

Further, as shown in FIG. 1, the vehicle 1 includes an electronic control device 100 that controls the vehicle 1. The electronic control device 100 outputs a command signal to the actuator that operates the connection switching device 40, and controls the operation of the connection switching device 40. For example, the electronic control device 100 includes a microcomputer provided with a CPU, RAM, ROM, an input / output interface, and the like. The CPU executes various controls of the vehicle 1 by performing signal processing according to a program stored in the ROM in advance while using the temporary storage function of the RAM.

Signals from various sensors mounted on the vehicle 1 are input to the electronic control device 100. For example, an engine rotation speed sensor, a motor rotation angle sensor, a vehicle speed sensor, an accelerator opening sensor, a Hi range selection switch for selecting a high-speed shift stage Hi by the driver's operation, and a four-wheel drive state by the driver's operation. A sensor signal from the 4WD selection switch for selection is input to the electronic control device 100. The electronic control device 100 executes drive control and the like of the vehicle 1 based on the input sensor signal. Then, the electronic control device 100 outputs a command signal for controlling the engine 2, a command signal for controlling the transmission 11, a command signal for controlling the transfer 12, and the like. The command signal for controlling the transfer 12 includes a command signal for controlling the motor 30 and a command signal for controlling the connection switching device 40. In short, the transfer 12 can be switched to a plurality of driving states by the planetary gear device 24 and the connection switching device 40.

Therefore, when the electronic control device 100 controls the drive state of the transfer 12, the planetary gear device 24 controls the operation of the motor 30 which is the second power source and also controls the connection state of the connection switching device 40. Control the operating state of. The planetary gear device 24 has a first mode (first operating state), a second mode (second operating state), and a third mode (third) when the electronic control device 100 executes switching control of the connection switching device 40. It is possible to switch between (operating state) and.

The third mode is an operating state in which two of the three rotating elements included in the planetary gear device 24 are connected to each other and one of the rotating elements is connected to the rear wheel side output shaft 22. In the first mode, one of the three rotating elements included in the planetary gear device 24 is connected to the input shaft 21, and one of the remaining rotating elements is fixed to the fixing member 29. At the same time, the other is in an operating state connected to the rear wheel side output shaft 22. The second mode is an operating state in which the three rotating elements included in the planetary gear device 24 are connected to the motor 30, the rear wheel side output shaft 22, and the front wheel side output shaft 23, respectively.

In this way, the planetary gear device 24 functions not only as a speed change unit but also as a speed change switching unit and a distribution switching unit. That is, in the transfer 12, the configuration including the connection switching device 40 and the planetary gear device 24 functions as an input switching unit, a speed change switching unit, and a distribution switching unit, thereby switching to a plurality of driving states. The transfer 12 of the first embodiment can be set to a first drive state, a second drive state, a third drive state, a fourth drive state, and a fifth drive state.

Here, the first to fifth drive states will be described with reference to FIGS. 2 to 11. In addition, FIG. 3, FIG. 5, FIG. 7, FIG. 9, and FIG. 11 show a collinear diagram showing the rotational state of the planetary gear device 24, in which the motor 30 is “MG” and the engine 2 is “ENG”. , The sun gear S is described as "S", the carrier C is described as "C", the ring gear R is described as "R", and the second dog clutch 42 is described as "CL1".

First, the first drive state will be described with reference to FIGS. 2 to 3. The first drive state is a two-wheel drive state in which power is transmitted only to the rear wheels 4 of the front and rear wheels, and the connection switching device 40 is in the non-distributed state and the planetary gear device 24 is in the shift state. In the first drive state, the power of the engine 2 and the motor 30 can be transmitted to the rear wheels 4, and the two-wheel drive is possible while the rotation of the engine 2 is not decelerated by the transfer 12.

As shown in FIG. 2, when the transfer 12 is in the first drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first dog clutch 41 directly connected state. In addition, the third dog clutch 43 is in a non-distributed state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22. The second switching sleeve 45 meshes with the third rotating member 53 and the fixing member 29. The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22.

As described above, in the first drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so that the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without going through the planetary gear device 24. It is transmitted to the shaft 22. Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. On the other hand, the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24 in the speed change state. Therefore, in the first drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, as shown in FIG. 3, the rotation of the motor 30 is changed by the planetary gear device 24 and the rear wheel side output shaft 22 is changed. Will be transmitted to. Further, in the first drive state, an EV traveling mode in which the vehicle 1 travels only by the power of the motor 30 is possible.

Next, the second drive state will be described with reference to FIGS. 4 to 5. The second drive state is a two-wheel drive state in which power is transmitted only to the rear wheels 4 of the front and rear wheels, and the connection switching device 40 is in the non-distributed state and the planetary gear device 24 is in the non-shift state. .. In the second drive state, the power of the engine 2 and the motor 30 can be transmitted to the rear wheels 4, and the two-wheel drive is possible while the rotation of the engine 2 is not decelerated by the transfer 12.

As shown in FIG. 4, when the transfer 12 is in the second drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 is the first dog clutch. 41 is in a direct connection state, and the third dog clutch 43 is in a non-distributed state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22. The second switching sleeve 45 meshes with the second rotating member 52 and the third rotating member 53. The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22.

In this way, in the second drive state, since the input shaft 21 is directly connected to the rear wheel side output shaft 22, the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without going through the planetary gear device 24. It is transmitted to the shaft 22. Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. Further, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-shifting state. Therefore, in the second drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, as shown in FIG. 5, the three rotating elements have the same rotation speed.

Next, the third drive state will be described with reference to FIGS. 6 to 7. The third drive state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, the connection switching device 40 is in the distributed state, and the planetary gear device 24 is in the distributed state (differential state). If this is the case. In the third drive state, front-rear distribution control is possible by the motor torque output from the motor 30. The third drive state is the so-called torque split 4WD mode. The torque split mode is intended to generate a driving force on the front wheels 3 by the power of the motor 30 and change the power distribution transmitted to the transmission unit 25 and the rear wheel side output shaft 22.

As shown in FIG. 6, when the transfer 12 is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentiated, and the connection switching device 40 is the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the distribution state, and the third dog clutch 43 is in the distribution state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22. The second switching sleeve 45 meshes with the second rotating member 52 and the transmission portion 25. The third switching sleeve 46 meshes with the third rotating member 53 and the rear wheel side output shaft 22. When the third rotating member 53 and the rear wheel side output shaft 22 are connected by the third switching sleeve 46 in this way, the first gear tooth 46a of the third switching sleeve 46 is the second gear tooth of the rear wheel side output shaft 22. It meshes with 22b, and the second gear tooth 46b of the third switching sleeve 46 meshes with the second output gear tooth 53b of the third rotating member 53.

As described above, in the third drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so that the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without going through the planetary gear device 24. It is transmitted to the shaft 22. Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. Further, since the planetary gear device 24 is in a differentially distributed state, the power of the motor 30 is distributed and transmitted to the transmission unit 25 and the rear wheel side output shaft 22 via the planetary gear device 24. Therefore, in the third drive state, as shown in FIG. 7, it is possible to control the distribution of the power transmitted to the front wheel side and the rear wheel side by the torque output from the motor 30.

Next, the fourth drive state will be described with reference to FIGS. 8 to 9. The fourth drive state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, and the connection switching device 40 is in the distributed state and the planetary gear device 24 is in the non-shifting state. In the fourth drive state, the fixed distribution 4WD mode is possible while the rotation of the engine 2 is not decelerated by the transfer 12. Further, the fourth drive state is the Hi mode in which the transfer 12 is set to the high-speed side shift stage Hi.

As shown in FIG. 8, when the transfer 12 is in the fourth drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 is the first dog clutch. 41 is in the direct connection state, and the third dog clutch 43 is in the distribution state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22. The second switching sleeve 45 meshes with the second rotating member 52 and the third rotating member 53. The third switching sleeve 46 meshes with the second rotating member 52 or the third rotating member 53, the rear wheel side output shaft 22, and the transmission portion 25. When the rear wheel side output shaft 22 and the transmission portion 25 are connected by the third switching sleeve 46 in this way, the second gear teeth 46b of the third switching sleeve 46 are the second output gear teeth of the second rotating member 52. It may be engaged with either one of the 52b and the second output gear tooth 53b of the third rotating member 53.

In this way, in the fourth drive state, since the input shaft 21 is directly connected to the rear wheel side output shaft 22, the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without going through the planetary gear device 24. It is transmitted to the shaft 22. Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. Further, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-shifting state. Therefore, in the fourth drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, as shown in FIG. 9, the three rotating elements have the same rotation speed.

Next, the fifth drive state will be described with reference to FIGS. 10 to 11. The fifth drive state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, and is set by the connection switching device 40 in the distribution state and the planetary gear device 24 in the shift state. .. In the fifth drive state, a fixed distribution 4WD mode in which the rotation of the engine 2 is decelerated by the transfer 12 is possible. Further, the fifth drive state is the Lo mode in which the transfer 12 is set to the low speed side shift stage Lo. That is, in the fifth drive state, the rear wheels 4 can be driven by the motor 30 even in the Lo mode.

As shown in FIG. 10, when the transfer 12 is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 has the first dog clutch 41 as the second input. The state (shift state) is set, and the third dog clutch 43 is in the distributed state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the first rotating member 51. The second switching sleeve 45 meshes with the third rotating member 53 and the fixing member 29. The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22.

In this way, in the fifth drive state, the input shaft 21 is connected to the first rotating member 51, so that the power transmitted from the engine 2 to the input shaft 21 is transmitted to the rear wheel side output shaft 22 via the planetary gear device 24. Be transmitted. Further, since the planetary gear device 24 is in a speed change state, the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22. Similarly, the motor 30 is also connected to the rear wheel side output shaft 22 via the planetary gear device 24 in the speed change state. Therefore, in the fifth drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, as shown in FIG. 11, the rotation of the motor 30 is changed by the planetary gear device 24 and the rear wheel side output shaft 22 is changed. Will be transmitted to.

As described above, according to the first embodiment, the motor 30 is always connected to a rotating element other than the rotating element fixed to the fixing member 29 among the three rotating elements included in the planetary gear device 24. Therefore, the power of the motor 30 can be transmitted to the rear wheel side output shaft 22 even when the planetary gear device 24 is in a speed change state in which one rotating element is fixed to the fixing member 29. As a result, when the planetary gear device 24 is in the shifting state, the power of the motor 30 can be added to the power of the engine 2 and transmitted to the rear wheels 4. Further, when the planetary gear device 24 is in the shifting state, the rotation of the motor 30 can be shifted by the planetary gear device 24 and transmitted to the rear wheels 4.

As a modification of the first embodiment described above, the planetary gear device 24 may be configured by a double pinion type planetary gear device. When the transfer 12 is provided with a double pinion type planetary gear device, the motor 30 is always connected to the sun gear S, the rotating element selectively fixed to the fixing member 29 becomes the carrier C, and the rotating element that functions as the output element is It becomes a ring gear R.

Further, as another modification, the input shaft 21 may be always connected to the sun gear S of the planetary gear device 24. In this case, the first dog clutch 41 switches between an engaged state in which the input shaft 21 is directly connected to the rear wheel side output shaft 22 and an released state in which the input shaft 21 is separated from the rear wheel side output shaft 22.

Further, as another modification, the case where the three rotating elements of the planetary gear device 24 rotate integrally in the third mode is not limited to the case where the carrier C and the ring gear R are integrally rotatably connected. That is, the two rotating elements that are integrally rotatably connected are not particularly limited. Further, all three rotating elements may be integrally rotatably connected.

As another modification, the rotating element fixed to the fixing member 29 among the three rotating elements of the planetary gear device 24 in the first mode may be any rotating element other than the input element. For example, the carrier C may be a fixing element for fixing to the fixing member 29, and the ring gear R may be an output element. In short, it suffices that one rotating element of the planetary gear device 24 can be fixed to the input from the input shaft 21 so that a difference in the number of rotations can be made between the input element and the output element. In the above-described embodiment, the sun gear S is an input element, the carrier C is an output element, and the ring gear R is a fixed element as a combination capable of decelerating most.

Further, in the above-described embodiment, the sun gear S is used as an input element and the carrier C is used as an output element as a combination in which the power transmission to the front wheel side is maximized in the second mode, but other combinations are also possible. For example, in the third mode, the ring gear R may be used as an input element and the carrier C may be used as an output element. When the planetary gear device 24 is a single pinion type, the motor 30 is connected to the carrier C, or when the planetary gear device 24 is a double pinion type, the motor 30 is connected to the ring gear R. Since it cannot be done, it is not included in the present invention.

Further, as another modification, the engaging device constituting the connection switching device 40 only needs to be able to realize the connection state between the first mode, the second mode, and the third mode, and the number and form thereof (dog clutch, friction clutch, etc.) ) Can be freely selected. The above-described embodiment is a configuration example in which all connected states can be realized by three dog clutches for miniaturization.

Further, the structure may be such that the motor can be driven in the Lo mode, and the motor 30 may be connected to any of the rotating elements as long as it is a rotating element other than the fixed element. In addition, the arrangement of the motor 30, the presence or absence of deceleration at the time of connection (reduction gear 31, etc.), the addition of the speed change mechanism to the motor 30, and the like are not particularly limited. It can be appropriately selected according to the specifications of the vehicle 1 and the motor 30. In the above-described embodiment, the rotation of the engine 2 and the rotation of the motor 30 can be simultaneously decelerated by the planetary gear device 24 in the Lo mode, and the deceleration function can be shared in the two-wheel drive state. This is a configuration example in which the speed change function of the motor alone is omitted by connecting to S.

Next, the power transmission device of the second embodiment will be described. In the second embodiment, unlike the first embodiment, when the three rotating elements of the planetary gear device 24 can be differentiated, the output element that outputs power to the front wheels 3 is the ring gear R. .. In the description of the second embodiment, reference numerals are given for the same configurations as those of the first embodiment, and the description thereof will be omitted.

FIG. 12 is a skeleton diagram schematically showing a transfer in the power transmission device of the second embodiment. In the transfer 12 of the second embodiment, the carrier C of the planetary gear device 24 is always connected to the rear wheel side output shaft 22. The carrier C and the rear wheel side output shaft 22 are connected so as to rotate integrally.

The connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, a first friction clutch 47, and a second friction clutch 48.

The second dog clutch 42 selectively fixes the ring gear R to the fixing member 29. The second switching sleeve 45 included in the second dog clutch 42 is always in mesh with the first output gear tooth 53a of the third rotating member 53. The second switching sleeve 45 is moved in the axial direction by the actuator of the second dog clutch 42 to switch between an engaged state in which it meshes with the fixing member 29 and an released state in which it does not mesh with the fixing member 29.

The third dog clutch 43 switches between a first distribution state in which the ring gear R is connected to the transmission unit 25 and a second distribution state in which the rear wheel side output shaft 22 is connected to the transmission unit 25. The third switching sleeve 46 included in the third dog clutch 43 is moved in the axial direction by the actuator of the third dog clutch 43, and is engaged with the third rotating member 53 and the transmission unit 25 in a state where it does not mesh with the rear wheel side output shaft 22. It switches between the first distribution state in which it meshes and the second distribution state in which it meshes with the rear wheel side output shaft 22 and the transmission unit 25 without meshing with the third rotating member 53.

The first friction clutch 47 is a friction engaging device that selectively fixes the ring gear R to the fixing member 29, and is configured to be hydraulically operated by a hydraulic actuator. The first friction clutch 47 has a first friction engaging element on the fixed side and a second friction engaging element on the rotating side that rotates integrally with the ring gear R, and an engaging force is generated by flood control. That is, in the first friction clutch 47, the engaging force can be controlled by controlling the oil pressure. Then, when the first friction clutch 47 is engaged, the ring gear R becomes non-rotatable, and when the first friction clutch 47 is released, the ring gear R becomes rotatable.

For example, when the ring gear R is fixed to the fixing member 29, the first friction clutch 47 is switched from the released state to the engaged state with the second dog clutch 42 released. Then, the second dog clutch 42 is switched from the released state to the engaged state while the first friction clutch 47 is kept in the engaged state. After that, when the second dog clutch 42 is engaged, the first friction clutch 47 can be released. As a result, the ring gear R can be fixed by a mechanical force without supplying a hydraulic pressure for generating an engaging force to the second friction clutch 48.

The second friction clutch 48 is a friction engagement device that selectively engages the ring gear R and the carrier C, and is configured to be hydraulically operated by a hydraulic actuator. The second friction clutch 48 has a first friction engaging element on the rotating side that rotates integrally with the ring gear R and a second friction engaging element on the rotating side that rotates integrally with the carrier C, and the engaging force is increased by hydraulic pressure. Occurs. The second friction clutch 48 can also control the engaging force by controlling the oil pressure. Then, when the second friction clutch 48 is engaged, the carrier C and the ring gear R are integrally rotatably connected, and when the second friction clutch 48 is released, the carrier C becomes relatively rotatable with respect to the ring gear R.

Further, as shown in FIG. 12, when the transfer 12 of the second embodiment is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially connected. In the switching device 40, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, the third dog clutch 43 is in the first distribution state, the first friction clutch 47 is in the released state, and the second friction clutch 48 is in the released state. That is, the second switching sleeve 45 does not mesh with the fixing member 29. As described above, in the third drive state of the second embodiment, the planetary gear device 24 is differentially capable, and the power of the motor 30 is transmitted from the ring gear R to the transmission unit 25 via the planetary gear device 24.

In the second embodiment described above, the configuration including the second dog clutch 42 has been described, but as a modification of the second embodiment, the configuration may not include the second dog clutch 42. Further, it is possible to apply the modification of the first embodiment described above to the second embodiment.

Next, the power transmission device of the third embodiment will be described. In the third embodiment, unlike the first embodiment and the second embodiment, the input shaft 21 is always connected to the sun gear S, and the motor 30 is always connected to the ring gear R. In the description of the third embodiment, reference numerals are given for the same configurations as those of the first embodiment and the second embodiment, and the description thereof will be omitted.

FIG. 13 is a skeleton diagram schematically showing a transfer in the power transmission device of the third embodiment. In the transfer 12 of the third embodiment, the sun gear S is always connected to the input shaft 21. The sun gear S and the input shaft 21 are connected so as to rotate integrally. Further, the motor 30 is always connected to the ring gear R.

The connection switching device 40 includes a second dog clutch 42, a third dog clutch 43, a first friction clutch 47, and a second friction clutch 48. That is, the third embodiment does not include the above-mentioned first dog clutch 41. Since the second friction clutch 48 is the same as that of the second embodiment, the description thereof will be omitted.

The second dog clutch 42 switches the connection relationship between the planetary gear device 24 and the transmission unit 25, and selectively connects the transmission unit 25 to the carrier C or the ring gear R. The second switching sleeve 45 included in the second dog clutch 42 is a switching member that meshes with the second rotating member 52, the third rotating member 53, and the transmission unit 25, and is in a distribution state that connects the carrier C and the transmission unit 25. , The distribution state that connects the ring gear R and the transmission unit 25 is switched.

The third dog clutch 43 switches the connection relationship between the input shaft 21, the rear wheel side output shaft 22, and the transmission unit 25. The third dog clutch 43 switches between a direct connection state in which the input shaft 21 and the rear wheel side output shaft 22 are directly connected and a shift state in which the transmission unit 25 is connected to the rear wheel side output shaft 22. The third switching sleeve 46 included in the third dog clutch 43 meshes with the input shaft 21, the rear wheel side output shaft 22, and the transmission unit 25. The third switching sleeve 46 is moved in the axial direction by the actuator of the third dog clutch 43, and is in a directly connected state where the input shaft 21 and the rear wheel side output shaft 22 are engaged with each other, and the rear wheel side output shaft 22 and the transmission portion 25 are engaged with each other. It switches between the shift state and the shift state.

The first friction clutch 47 is a friction engaging device that selectively fixes the carrier C to the fixing member 29, and is configured to be hydraulically operated by a hydraulic actuator. The first friction clutch 47 has a first friction engaging element on the fixed side and a second friction engaging element on the rotating side that rotates integrally with the carrier C, and an engaging force is generated by flood control. Then, when the first friction clutch 47 is engaged, the carrier C becomes non-rotatable, and when the first friction clutch 47 is released, the carrier C becomes rotatable.

Further, as shown in FIG. 13, when the transfer 12 of the third embodiment is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially connected. In the switching device 40, the second dog clutch 42 is in the distributed state, the third dog clutch 43 is in the non-distributed state, the first friction clutch 47 is in the released state, and the second friction clutch 48 is in the released state. That is, the second switching sleeve 45 meshes with the second rotating member 52 and the transmission portion 25. The third switching sleeve 46 meshes with the input shaft 21 and the rear wheel side output shaft 22. As described above, in the third drive state of the third embodiment, the planetary gear device 24 is differentially capable, and the power of the motor 30 is transmitted from the carrier C to the transmission unit 25.

As a modification of the third embodiment described above, a dog clutch that selectively connects the carrier C to the fixing member 29 may be provided. It is possible to apply the modification of the first embodiment described above to the third embodiment.

Next, the power transmission device of the fourth embodiment will be described. In the fourth embodiment, unlike the first embodiment, the third dog clutch 43 is configured to also function as an input switching unit. In the description of the fourth embodiment, reference numerals are given for the same configurations as those of the first embodiment, and the description thereof will be omitted.

FIG. 14 is a skeleton diagram schematically showing a transfer in the power transmission device of the fourth embodiment. In the transfer 12 of the fourth embodiment, the third dog clutch 43 can selectively connect the input shaft 21 and the rear wheel side output shaft 22.

The first dog clutch 41 switches between a shifting state (engaged state) in which the input shaft 21 and the sun gear S are connected and a non-shifting state (release state) in which the input shaft 21 and the sun gear S are not connected.

The third dog clutch 43 switches the connection relationship between the input shaft 21, the rear wheel side output shaft 22, the carrier C, the ring gear R, and the transmission unit 25. The third switching sleeve 46 included in the third dog clutch 43 is in a first non-distributed state in which the input shaft 21, the second rotating member 52, and the rear wheel side output shaft 22 mesh with each other, and the input shaft 21, the third rotating member 53, and the rear. The second non-distributed state that meshes with the wheel side output shaft 22 and the distributed state that meshes with the second rotating member 52, the rear wheel side output shaft 22, and the transmission unit 25 are switched. The third switching sleeve 46 further has a fourth gear tooth 46d. The fourth gear tooth 46d meshes with the gear tooth 21b of the input shaft 21.

Further, as shown in FIG. 14, when the transfer 12 of the fourth embodiment is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first mode. The 1 dog clutch 41 is in the shift state (engaged state), and the 3rd dog clutch 43 is in the distributed state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the first rotating member 51. The second switching sleeve 45 meshes with the third rotating member 53 and the fixing member 29. The third switching sleeve 46 meshes with the second rotating member 52, the rear wheel side output shaft 22, and the transmission portion 25.

In addition, it is possible to apply the modification of the first embodiment described above to the fourth embodiment.

Further, in the first embodiment, since EV traveling by two-wheel drive is possible, the rotation of the motor 30 is shifted by the transfer 12 by executing the EV traveling mode when the transfer 12 is in the first drive state. Is transmitted to the rear wheel 4. Further, in the first embodiment, the EV traveling mode can be implemented when the transfer 12 is in the second drive state. That is, by executing the EV traveling mode when the transfer 12 is in the second drive state, the rotation of the motor 30 is transmitted to the rear wheels 4 without deceleration by the transfer 12. Then, in the first embodiment, the rear wheels 4 are the first driving wheels, and the front wheels 3 are the second driving wheels.

Further, in the first embodiment, the second dog clutch 42 is a fixed switching unit that selectively connects any one of the three rotating elements of the planetary gear device 24 to the fixed member 29. That is, the connection switching device 40 has a fixed switching unit. Then, the fixed switching unit switches between a fixed state in which the third rotating element is connected to the fixing member 29 and a non-fixed state in which the third rotating element is rotatably released.

Further, in the first embodiment, when the transfer 12 is in the fourth embodiment and the fifth drive state, the third switching sleeve 46 is connected to the transmission unit 25. On the other hand, when the transfer 12 is in the first drive state, the second drive state, and the third drive state, the third switching sleeve 46 is not connected to the transmission unit 25. Further, when the transfer 12 is in the third drive state, the second switching sleeve 45 is connected to the transmission unit 25. On the other hand, when the transfer 12 is in the first drive state, the second drive state, the fourth drive state, and the fifth drive state, the second switching sleeve 45 is not connected to the transmission unit 25.

Further, in the first embodiment, the connection switching device 40 selectively switches the connection relationship between the input shaft 21, the rear wheel side output shaft 22, the front wheel side output shaft 23, the sun gear S, the carrier C, and the ring gear R. Then, the input switching unit switches the connection destination of the input shaft 21. Further, the distribution switching unit selectively connects the rear wheel side output shaft 22 to the carrier C or the ring gear R. The distribution switching unit switches between a first connection state in which the rear wheel side output shaft 22 is connected to the carrier C and a second connection state in which the rear wheel side output shaft 22 is connected to the ring gear R. Further, the distribution switching unit can switch to the third connection state in which the rear wheel side output shaft 22 is connected to the carrier C and the ring gear R.

More specifically, the distribution switching unit includes a first distribution switching member that selectively connects the rear wheel side output shaft 22 to the carrier C or the ring gear R, and a second distribution that selectively connects the carrier C and the ring gear R. It has a switching member. The first distribution switching member switches between a first connection state, a second connection state, and a third connection state. The second distribution switching member switches between a fourth connection state in which the carrier C and the ring gear R are connected and a fifth connection state in which the carrier C and the ring gear R are not connected. That is, the third dog clutch 43 and the third switching sleeve 46 switch between the first connection state, the second connection state, and the third connection state. The second dog clutch 42 and the second switching sleeve 45 switch between the fourth connection state and the fifth connection state.

Further, as in the second embodiment and the third embodiment, in the configuration in which the connection switching device 40 includes the second friction clutch 48 and the ring gear R and the carrier C are selectively engaged by the second friction clutch 48. The second friction clutch 48 functions as a second distribution switching member. That is, as shown in FIG. 12, in the second embodiment, the third dog clutch 43 and the third switching sleeve 46 are switched between the first connection state and the second connection state. Then, the second friction clutch 48 switches between the fourth connection state and the fifth connection state.

Next, the power transmission device of the fifth embodiment will be described. In the fifth embodiment, unlike the first embodiment, the power transmission device 10 is configured to be capable of two-wheel drive traveling with only the front wheels 3 as drive wheels in the EV traveling mode. In the description of the fifth embodiment, reference numerals are given for the same configurations as those of the first embodiment, and the description thereof will be omitted.

The vehicle 1 of the fifth embodiment includes a power transmission device 10 capable of two-wheel drive traveling in which the front wheels 3 are the driving wheels and the rear wheels 4 are the driven wheels during the EV traveling mode. The front wheels 3 serve as driving wheels during two-wheel drive traveling and four-wheel drive traveling in the EV traveling mode. The rear wheels 4 become driven wheels during two-wheel drive traveling in the EV traveling mode, and become driving wheels during four-wheel drive traveling. In this fifth embodiment, the rear wheels 4 are the first drive wheels and the front wheels 3 are the second drive wheels.

FIG. 15 is a skeleton diagram schematically showing a transfer in the power transmission device of the fifth embodiment. In the transfer 12 of the fifth embodiment, the carrier C of the planetary gear device 24 is always connected to the transmission unit 25 which is the input unit on the front wheel side. The carrier C and the transmission unit 25 are connected so as to rotate integrally. That is, the carrier C is always connected to the front wheel side output shaft 23 so as to be able to transmit power.

The motor 30 is arranged on the same axis as the input shaft 21 and the rear wheel side output shaft 22, and is configured to rotate integrally with the first rotating member 51. The motor 30 has a rotor 30a attached to the first rotating member 51. The rotor 30a is connected to the sun gear S so as to rotate integrally. Therefore, the rotor 30a, the first rotating member 51, and the sun gear S rotate integrally.

The second dog clutch 42 selectively fixes the ring gear R to the fixing member 29. That is, the second dog clutch 42 is a fixed switching unit. The second switching sleeve 45 included in the second dog clutch 42 is always in mesh with the fixing member 29. The second switching sleeve 45 is between an engaged state (fixed state) in which the third rotating member 53 meshes with the first output gear tooth 53a and an released state (non-fixed state) in which the second switching sleeve 45 does not mesh with the first output gear tooth 53a. It switches with.

The third dog clutch 43 switches the connection relationship between the rear wheel side output shaft 22, the carrier C, and the ring gear R. The third dog clutch 43 has a first non-distributed state (sixth connection state) in which the rear wheel side output shaft 22 is not connected to the ring gear R and the carrier C, and a second non-distributed state (seventh) in which the ring gear R is connected to the carrier C. The connection state), the first distribution state (second connection state) in which the rear wheel side output shaft 22 is connected to the ring gear R, and the second distribution state (second distribution state) in which the rear wheel side output shaft 22 is connected to the ring gear R and the carrier C. 3 connection state) and a third distribution state (first connection state) in which the rear wheel side output shaft 22 is connected to the carrier C. That is, the third dog clutch 43 of the fifth embodiment has a sixth connection state in which the rear wheel side output shaft 22 is not connected to the ring gear R and the carrier C as a distribution switching unit, and a seventh connection in which the ring gear R is connected to the carrier C. It is possible to switch to the state.

The third dog clutch 43 has a first distribution switching member and a third switching sleeve 46 that functions as a second distribution switching member. The third switching sleeve 46 includes a first gear tooth 46a that meshes with a second gear tooth 22b of the rear wheel side output shaft 22 and a second output gear tooth 53b of the third rotating member 53, and a second output of the second rotating member 52. It has a gear tooth 52b, a second output gear tooth 53b of the third rotating member 53, and a second gear tooth 46b that meshes with the second gear tooth 22b of the rear wheel side output shaft 22. The third switching sleeve 46 has a first non-distributed state (sixth connection state) that meshes only with the rear wheel side output shaft 22, and a third rotating member 53 and a third rotating member 53 that do not mesh with the rear wheel side output shaft 22. The second non-distributed state (seventh connection state) that meshes with the two rotating members 52 and the first distributed state (second distributed state) that meshes with the rear wheel side output shaft 22 and the third rotating member 53 without meshing with the second rotating member 52. (Connected state), the second distribution state (third connection state) in which the rear wheel side output shaft 22, the third rotating member 53, and the second rotating member 52 mesh with each other, and the rear wheel in a state in which the rear wheel side output shaft 22 does not mesh with the third rotating member 53. It switches between the third distribution state (first connection state) that meshes with the side output shaft 22 and the second rotating member 52. That is, the third switching sleeve 46 of the fifth embodiment is a third rotating member as a distribution switching member in a sixth connected state in which it meshes only with the rear wheel side output shaft 22 and in a state where it does not mesh with the rear wheel side output shaft 22. It is possible to switch to the seventh connection state in which the 53 and the second rotating member 52 mesh with each other. Since the third dog clutch 43 also functions as a second distribution switching member, the carrier C and the ring gear R are connected to each other in the first connection state, the third connection state, and the seventh connection state as the first distribution switching member. In this case, it means that the second distribution switching member is in the fourth connection state. Similarly, the third dog clutch 43 means that it is in the second connection state as the first distribution switching member, and when it is in the sixth connection state, it is in the fifth connection state as the second distribution switching member.

Here, with reference to FIGS. 15 to 19, the first to fifth drive states realized by the transfer 12 of the fifth embodiment will be described.

First, the first driving state of the fifth embodiment will be described with reference to FIG. The first drive state of the fifth embodiment is a two-wheel drive state in which power is transmitted only to the front wheels 3 of the front and rear wheels, the connection switching device 40 is in the non-distributed state, and the planetary gear device 24 is in the shift state. If this is the case. In this first drive state, the power of the motor 30 can be transmitted to the front wheels 3 with the engine 2 stopped, and the two-wheel drive in which the rotation of the motor 30 is decelerated by the transfer 12 is possible.

As shown in FIG. 15, when the transfer 12 of the fifth embodiment is in the first drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first non-distributed state (sixth connection state). That is, the second switching sleeve 45 meshes with the third rotating member 53 and the fixing member 29. The third switching sleeve 46 meshes only with the rear wheel side output shaft 22.

As described above, in the first drive state, although the engine 2 is directly connected to the rear wheel side output shaft 22, the rear wheel side output shaft 22 is not driven by the engine 2 while the engine 2 is stopped. On the other hand, the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24 in the speed change state. Therefore, in the first drive state, when the power of the motor 30 is transmitted to the front wheel side output shaft 23, the rotation of the motor 30 is changed by the planetary gear device 24 and transmitted to the front wheel side output shaft 23.

Next, the second driving state of the fifth embodiment will be described with reference to FIG. The second drive state of the fifth embodiment is a two-wheel drive state in which power is transmitted only to the front wheels 3 of the front and rear wheels, the connection switching device 40 is in the non-distributed state, and the planetary gear device 24 is in the non-shift state. This is the case. In this second drive state, the power of the motor 30 can be transmitted to the front wheels 3 with the engine 2 stopped, and the two-wheel drive can be performed while the rotation of the motor 30 is not decelerated by the transfer 12.

As shown in FIG. 16, when the transfer 12 of the fifth embodiment is in the second drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device is set. In 40, the first dog clutch 41 is in a directly connected state, and the third dog clutch 43 is in a second non-distributed state (seventh connected state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53. The third switching sleeve 46 meshes with the second rotating member 52 and the third rotating member 53.

As described above, in the second drive state, although the engine 2 is directly connected to the rear wheel side output shaft 22, the rear wheel side output shaft 22 is not driven by the engine 2 while the engine 2 is stopped. Further, although the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24, the planetary gear device 24 is in a non-shifting state. Therefore, in the second drive state, when the power of the motor 30 is transmitted to the front wheel side output shaft 23, the three rotating elements of the planetary gear device 24 have the same rotation speed. That is, the rotation of the motor 30 is transmitted to the front wheel side output shaft 23 without shifting by the planetary gear device 24.

Next, the third driving state of the fifth embodiment will be described with reference to FIG. As shown in FIG. 17, when the transfer 12 of the fifth embodiment is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentiated, and the connection switching device is set. In 40, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first distribution state (second connection state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53. The third switching sleeve 46 meshes with the third rotating member 53 and the rear wheel side output shaft 22.

Next, the fourth drive state of the fifth embodiment will be described with reference to FIG. As shown in FIG. 18, when the transfer 12 of the fifth embodiment is in the fourth drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device is set. In 40, the first dog clutch 41 is in a direct connection state, the second dog clutch 42 is in an released state, and the third dog clutch 43 is in a second distribution state (third connection state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53. The third switching sleeve 46 meshes with the second rotating member 52, the third rotating member 53, and the rear wheel side output shaft 22.

Next, the fifth driving state of the fifth embodiment will be described with reference to FIG. First, in the fifth drive state of the fifth embodiment, the front wheels 3 can be driven by the motor 30 even in the Lo mode. Then, as shown in FIG. 19, when the transfer 12 of the fifth embodiment is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first mode. The 1 dog clutch 41 is in the second input state, the second dog clutch 42 is in the engaged state, and the third dog clutch 43 is in the third distribution state (first connection state). That is, the second switching sleeve 45 meshes with the fixing member 29 and the third rotating member 53. The third switching sleeve 46 meshes with the rear wheel side output shaft 22 and the second rotating member 52.

As described above, according to the fifth embodiment, the same effect as that of the first embodiment can be obtained even in the power transmission device 10 capable of driving only the front wheels 3 in the EV traveling mode.

As a modification of the fifth embodiment, a friction engaging device that selectively connects the carrier C and the ring gear R may be provided. Examples of this modification are shown in FIGS. 20 and 21.

As shown in FIG. 20, in the transfer 12 in the first modification of the fifth embodiment, the connection switching device 40 includes the first dog clutch 41, the second dog clutch 42, the third dog clutch 43, the friction clutch 401, and the like. It has. The friction clutch 401 has the same hardware configuration as the second friction clutch 48 of the second embodiment.

In this first modification, the carrier C in the planetary gear device 24 is caused by the first dog clutch 41 being in the direct connection state, the second dog clutch 42 being in the released state, and the third dog clutch 43 being in the first distributed state or the first non-distributed state. When the ring gear R and the ring gear R are in relative rotation, the friction clutch 401 can be switched between the engaged state and the disengaged state.

For example, as shown in FIG. 20, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 is the ring gear R and the rear wheel side output shaft. When the 22 is connected, the transfer 12 is in the fourth drive state when the friction clutch 401 is engaged, and the transfer 12 is in the third drive state when the friction clutch 401 is in the released state. That is, in the first modification, the third drive state and the fourth drive state can be changed by changing the state of the friction clutch 401 without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. Switching is possible. Then, when the friction clutch 401 is switched from the released state to the engaged state to shift from the third drive state to the fourth drive state, the third switching sleeve 46 is shafted with the friction clutch 401 engaged. The third switching sleeve 46 may be connected to the second rotating member 52, the third rotating member 53, and the rear wheel side output shaft 22 by moving in the direction. In this case, the friction clutch 401 may be switched from the engaged state to the released state after the third switching sleeve 46 shifts from the first distributed state to the second distributed state.

Further, as shown in FIG. 21, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 is only the rear wheel side output shaft 22. When connected, the transfer clutch 401 is in the engaged state, so that the transfer 12 is in the second drive state. That is, in the first modification, the second drive state is realized by switching the friction clutch 401 from the released state to the engaged state without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. It is possible to do.

Further, in the first modification, instead of the friction clutch 401, a dedicated dog clutch for selectively engaging the carrier C and the ring gear R may be provided. Further, in this first modification, instead of the second dog clutch 42, a dedicated friction engaging device for connecting the ring gear R to the fixing member 29 may be provided.

Further, as a second modification of the fifth embodiment, in addition to a friction engaging device (friction clutch 401) that selectively connects the carrier C and the ring gear R, friction that selectively fixes the ring gear R to the fixing member 29. An engaging device may be provided. An example of this second modification is illustrated in FIG.

As shown in FIG. 22, in the transfer 12 in the second modification of the fifth embodiment, the connection switching device 40 includes the first dog clutch 41, the second dog clutch 42, the third dog clutch 43, and the first friction clutch 47. And a second friction clutch 48. The first friction clutch 47 is the same as the first friction clutch 47 of the second embodiment. The second friction clutch 48 has the same hardware configuration as the friction clutch 401 of the modified example.

In this second modification, the carrier C and the ring gear R are connected to each other in the planetary gear device 24 because the first dog clutch 41 is in the directly connected state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first non-distributed state. In the case of relative rotation, it is possible to switch between the engaged state and the released state of the first friction clutch 47 and the second friction clutch 48.

For example, as shown in FIG. 22, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 is only the rear wheel side output shaft 22. When connected, the transfer 12 is in the first drive state when the first friction clutch 47 is in the engaged state and the second friction clutch 48 is in the released state, and the first friction clutch 47 is in the released state and the second friction clutch. When the 48 is in the engaged state, the transfer 12 is in the second drive state. That is, in the second modification, the first drive state and the second drive state are obtained by changing the states of the first friction clutch 47 and the second friction clutch 48 without operating the second dog clutch 42 and the third dog clutch 43. It is possible to switch with.

Next, the power transmission device of the sixth embodiment will be described. In the sixth embodiment, unlike the fifth embodiment, the power transmission device 10 is configured so that the front wheel side output shaft 23 can be selectively separated from the carrier C. In the description of the sixth embodiment, reference numerals are given for the same configurations as those of the fifth embodiment, and the description thereof will be omitted.

First, the vehicle 1 of the sixth embodiment has a power transmission device 10 capable of two-wheel drive traveling with the rear wheels 4 as the driving wheels and the front wheels 3 as the driven wheels during the EV traveling mode, as in the first embodiment. I have. In this sixth embodiment, the rear wheels 4 are the first drive wheels and the front wheels 3 are the second drive wheels.

FIG. 23 is a skeleton diagram schematically showing a transfer in the power transmission device of the sixth embodiment. In the transfer 12 of the sixth embodiment, the carrier C of the planetary gear device 24 is not always connected to the front wheel side output shaft 23. The carrier C and the front wheel side output shaft 23 are configured to be relatively rotatable.

The connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, and a fourth dog clutch 402. The third switching sleeve 46 included in the third dog clutch 43 functions as a first distribution switching member and a second distribution switching member.

The fourth dog clutch 402 is an engaging device that functions as a distribution switching unit, and selectively connects the carrier C to the front wheel side output shaft 23. The fourth dog clutch 402 has an eighth connection state (engaged state) for connecting the carrier C and the front wheel side output shaft 23 and a ninth connection state (release state) for disconnecting the carrier C and the front wheel side output shaft 23. It is possible to switch to. That is, the fourth dog clutch 402 distributes a part of the power transmitted to the rear wheel side output shaft 22 to the front wheel side output shaft 23, and outputs the power transmitted to the rear wheel side output shaft 22 to the front wheel side output. It switches between a non-distributed state that does not distribute to the shaft 23.

The fourth dog clutch 402 has a fourth switching sleeve 403 as a third distribution switching member. The fourth switching sleeve 403 has a first gear tooth 403a that meshes with the first input gear tooth 25a of the transmission unit 25 and meshes with the second output gear tooth 52b of the second rotating member 52 that rotates integrally with the carrier C. The second rotating member 52 is rotatable relative to the transmitting portion 25 and has a first input gear tooth 25a. The fourth switching sleeve 403 is moved in the axial direction by the actuator of the fourth dog clutch 402. Then, the fourth switching sleeve 403 selectively meshes with the second output gear tooth 52b of the second rotating member 52 in a state where the first gear tooth 403a always meshes with the first input gear tooth 25a of the transmission unit 25. That is, the fourth switching sleeve 403 has a ninth connection state (release state) in which the carrier C and the transmission unit 25 are not connected, and an eighth connection state (engagement state) in which the carrier C and the transmission unit 25 are connected. Switch between.

As shown in FIG. 23, when the transfer 12 of the sixth embodiment is in the first drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the engaged state, the third dog clutch 43 is in the third distribution state (first connection state), and the fourth dog clutch 402 is in the released state (disengaged state). That is, the fourth switching sleeve 403 does not mesh with the second rotating member 52. The third switching sleeve 46 meshes with the rear wheel side output shaft 22 and the second rotating member 52 in a state where it does not mesh with the third rotating member 53.

As described above, in the first drive state of the sixth embodiment, the input shaft 21 is directly connected to the rear wheel side output shaft 22, but the rear wheel side output shaft 22 is driven by the engine 2 while the engine 2 is stopped. There is no such thing. On the other hand, the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24 in the speed change state. Therefore, in the first drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, the rotation of the motor 30 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22. That is, in the sixth embodiment, by executing the EV traveling mode when the transfer 12 is in the first drive state, the two-wheel drive in which the rotation of the motor 30 is changed by the transfer 12 is possible.

As shown in FIG. 24, when the transfer 12 of the sixth embodiment is in the second drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device is set. In 40, the first dog clutch 41 is in a directly connected state, the second dog clutch 42 is in an released state, the third dog clutch 43 is in a second distribution state (third connection state), and the fourth dog clutch 402 is in an released state (disengaged state). That is, the fourth switching sleeve 403 does not mesh with the second rotating member 52. The third switching sleeve 46 meshes with the rear wheel side output shaft 22, the third rotating member 53, and the second rotating member 52.

As described above, in the second drive state of the sixth embodiment, although the input shaft 21 is directly connected to the rear wheel side output shaft 22, the rear wheel side output shaft 22 is driven by the engine 2 while the engine 2 is stopped. There is no such thing. Further, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-shifting state. Therefore, in the second drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, the three rotating elements of the planetary gear device 24 have the same rotation speed. That is, the rotation of the motor 30 is transmitted to the rear wheel side output shaft 22 without shifting by the planetary gear device 24. That is, in the sixth embodiment, by executing the EV traveling mode when the transfer 12 is in the second drive state, the two-wheel drive in which the rotation of the motor 30 is changed by the transfer 12 is possible.

As a modification of the sixth embodiment, a friction engaging device that selectively connects the carrier C and the ring gear R may be provided. An example of this modification is illustrated in FIG.

As shown in FIG. 25, in the transfer 12 in the first modification of the sixth embodiment, the connection switching device 40 includes the first dog clutch 41, the second dog clutch 42, the third dog clutch 43, the friction clutch 401, and the like. It has. The friction clutch 401 is the same as the friction clutch 401 in the first modification of the fifth embodiment.

In this first modification, the carrier C in the planetary gear device 24 is due to the fact that the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the third distribution state (first connection state). When the ring gear R and the ring gear R are in relative rotation, the friction clutch 401 can be switched between the engaged state and the disengaged state.

For example, as shown in FIG. 25, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 is the carrier C and the rear wheel side output shaft. When the 22 is connected, the transfer clutch 401 is in the engaged state, so that the transfer 12 is in the second drive state. That is, in the first modification, the second drive state is realized by switching the friction clutch 401 from the released state to the engaged state without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. It is possible.

Further, as a second modification of the sixth embodiment, in addition to a friction engaging device (friction clutch 401) that selectively connects the carrier C and the ring gear R, friction that selectively fixes the ring gear R to the fixing member 29. An engaging device may be provided. An example of this second modification is illustrated in FIG.

As shown in FIG. 26, in the transfer 12 in the second modification of the sixth embodiment, the connection switching device 40 includes the first dog clutch 41, the second dog clutch 42, the third dog clutch 43, and the first friction clutch 47. And a second friction clutch 48. The first friction clutch 47 and the second friction clutch 48 are the same as the first friction clutch 47 and the second friction clutch 48 of the fifth embodiment.

In this second modification, the carrier C in the planetary gear device 24 is due to the fact that the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the third distribution state (first connection state). When the ring gear R and the ring gear R are in relative rotation, it is possible to switch between the engaged state and the released state of the first friction clutch 47 and the second friction clutch 48.

For example, as shown in FIG. 26, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 is the rear wheel side output shaft 22 and the carrier. When connected to C, the transfer 12 is in the first drive state when the first friction clutch 47 is in the engaged state and the second friction clutch 48 is in the released state, and the first friction clutch 47 is in the released state and the first. 2 When the friction clutch 48 is engaged, the transfer 12 is in the second drive state. That is, in the second modification, the first drive state and the second drive state are obtained by changing the states of the first friction clutch 47 and the second friction clutch 48 without operating the second dog clutch 42 and the third dog clutch 43. It is possible to switch with.

Next, the power transmission device of the seventh embodiment will be described. In the seventh embodiment, unlike the fifth embodiment, one engaging device constituting the connection switching device 40 is provided for each connection destination of each rotating member. In the description of the seventh embodiment, reference numerals are given for the same configurations as those of the fifth embodiment, and the description thereof will be omitted.

As shown in FIG. 27, the connection switching device 40 of the seventh embodiment includes the first clutch 410, the second clutch 420, the third clutch 430, the fourth clutch 440, the fifth clutch 450, and the first clutch. It is equipped with a brake 460.

The first clutch 410 is an engaging device that functions as an input switching unit and a speed change switching unit, and is a friction engaging device that selectively connects the input shaft 21 to the rear wheel side output shaft 22. The first clutch 410 has a first friction engaging element 411 that rotates integrally with the input shaft 21 and a second friction engaging element 412 that rotates integrally with the output shaft 22 on the rear wheel side, and the engaging force is generated by flood control. Occurs. That is, in the first clutch 410, the engaging force can be controlled by controlling the oil pressure. The first clutch 410 is in an engaged state (directly connected state) in which the input shaft 21 is connected to the rear wheel side output shaft 22 and an released state (disengaged state) in which the input shaft 21 is not connected to the rear wheel side output shaft 22. Switch to. When the first clutch 410 is engaged, the input shaft 21 and the rear wheel side output shaft 22 are integrally rotatable, and when the first clutch 410 is released, the input shaft 21 and the rear wheel side output shaft 22 are relatively rotatable. Be separated.

The second clutch 420 is an engaging device that functions as an input switching unit and a speed change switching unit, and is a dog clutch that selectively connects the input shaft 21 to the sun gear S. Then, the second clutch 420 switches between an engaged state (input state) in which the input shaft 21 is connected to the sun gear S and an released state (disengaged state) in which the input shaft 21 is not connected to the sun gear S. When the second clutch 420 is engaged, the input shaft 21 and the sun gear S are integrally rotatably connected. When the second clutch 420 is released, the input shaft 21 and the sun gear S are disengaged so as to be relatively rotatable.

The second clutch 420 has a first switching sleeve 421 as an input switching member. The first switching sleeve 421 has a gear tooth 21a of the input shaft 21 and a gear tooth 421a that meshes with the input gear tooth 51a of the first rotating member 51. The first switching sleeve 421 is moved in the axial direction by the actuator of the second clutch 420. The first switching sleeve 421 is in an engaged state in which the gear teeth 421a are always meshed with the input shaft 21 and in mesh with the input gear teeth 51a of the first rotating member 51, and in a released state in which the gear teeth 421a are not meshed with the input gear teeth 51a. Switch between. That is, when the gear teeth 421a mesh with the input gear teeth 51a of the first rotating member 51, the second clutch 420 is in the engaged state (input state). On the other hand, when the gear teeth 421a do not mesh with the input gear teeth 51a, the second clutch 420 is in the released state (disengaged state).

As described above, the first clutch 410 and the second clutch 420 are so-called high-low switching units (shift switching units), and the rotation of the input shaft 21 is shifted by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22. The state is switched between the state and the direct connection state in which the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. That is, the first input state in which the power from the engine 2 is transmitted to the rear wheel side output shaft 22 by the first clutch 410 and the second clutch 420 without going through the planetary gear device 24, and the power from the engine 2 are transmitted. , The second input state transmitted to the rear wheel side output shaft 22 via the planetary gear device 24 is switched.

The third clutch 430 is an engaging device that functions as a distribution switching unit, and is a dog clutch that selectively connects the rear wheel side output shaft 22 and the ring gear R. The third clutch 430 is in an engaged state (second connection state) in which the rear wheel side output shaft 22 and the ring gear R are connected, and an released state (third state) in which the rear wheel side output shaft 22 and the ring gear R are not connected. Switch to (connection status). When the third clutch 430 is engaged, a part of the power transmitted to the rear wheel side output shaft 22 is distributed to the front wheel side output shaft 23. When the third clutch 430 is released, the power transmitted to the rear wheel side output shaft 22 is not distributed to the front wheel side output shaft 23, and is in a non-distributed state.

The third clutch 430 has a third switching sleeve 431 that functions as a first distribution switching member. The third switching sleeve 431 has gear teeth 431a that mesh with the second gear teeth 22b of the rear wheel side output shaft 22 and the second output gear teeth 52b of the third rotating member 53. The third switching sleeve 431 is moved in the axial direction by the actuator of the third clutch 430. The third switching sleeve 431 is in an engaged state in which the gear teeth 431a are constantly meshed with the third rotating member and meshes with the second gear teeth 22b of the rear wheel side output shaft 22, and the second gear teeth 22b are engaged. It switches between the released state and the disengaged state. When the gear teeth 431a mesh with the second gear teeth 22b of the rear wheel side output shaft 22, the second clutch 420 is engaged. On the other hand, when the gear teeth 431a do not mesh with the second gear teeth 22b of the rear wheel side output shaft 22, the third clutch 430 is released. In this way, the third switching sleeve 431 can be switched between the second connection state and the third connection state as the first distribution switching member.

The fourth clutch 440 is an engaging device that functions as a distribution switching unit, and is a friction engaging device that selectively connects the carrier C and the rear wheel side output shaft 22. The fourth clutch 440 has a first friction engaging element that rotates integrally with the carrier C and a second friction engaging element that rotates integrally with the rear wheel side output shaft 22, and an engaging force is generated by flood control. In the fourth clutch 440, the engaging force can be controlled by controlling the oil pressure. The fourth clutch 440 has an engaged state in which the carrier C is connected to the rear wheel side output shaft 22 (first connection state) and an released state in which the carrier C is not connected to the rear wheel side output shaft 22 (third connection state). ) And switch to. When the fourth clutch 440 is engaged, the carrier C and the rear wheel side output shaft 22 are integrally rotatably connected. When the fourth clutch 440 is released, the carrier C and the rear wheel side output shaft 22 are detached so as to be relatively rotatable. As described above, the fourth clutch 440 has a function as a first distribution switching member, and can switch between the first connection state and the third connection state. That is, the third clutch 430 and the fourth clutch 440 have separate functions as the first distribution switching member. Therefore, the third clutch 430 and the fourth clutch 440 function as the first distribution switching member, and can switch between the first connection state, the second connection state, and the third connection state.

The fifth clutch 450 is an engaging device that functions as a shift switching unit and a distribution switching unit, and is a friction engaging device that selectively connects the carrier C and the ring gear R. The fifth clutch 450 has a first friction engaging element that rotates integrally with the ring gear R and a second friction engaging element that rotates integrally with the carrier C, and an engaging force is generated by flood control. In the fifth clutch 450, the engaging force can be controlled by controlling the oil pressure. Then, the fifth clutch 450 switches between an engaged state in which the ring gear R and the carrier C are connected (fourth connected state) and an released state in which the ring gear R and the carrier C are not connected (fifth connected state). When the fifth clutch 450 is engaged, the carrier C and the ring gear R are integrally rotatably connected. When the fifth clutch 450 is released, the carrier C and the ring gear R are separated from each other so as to be relatively rotatable (differentiable). As described above, the fifth clutch 450 has a function as a second distribution switching member, and can switch between the fourth connection state and the fifth connection state.

The first brake 460 is an engaging device that functions as a fixed switching unit and a speed change switching unit, and is a dog clutch that selectively connects the ring gear R and the fixed member 29. Then, the first brake 460 switches between an engaged state (fixed state) in which the ring gear R and the fixing member 29 are connected and an released state (non-fixed state) in which the ring gear R and the fixing member 29 are not connected. That is, the first brake 460 selectively fixes the ring gear R to the fixing member 29. Therefore, the first brake 460 switches between a fixed state in which the ring gear R is mechanically fixed and a released state in which the ring gear R is rotatable.

The first brake 460 has a shift switching member and a second switching sleeve 461 as a fixed switching member. The second switching sleeve 461 has a first output gear tooth 53a of the third rotating member 53 and a gear tooth 461a that meshes with the fixing member 29. For example, the second switching sleeve 461 is moved in the axial direction by the actuator of the first brake 460 in a state of being constantly meshed with the fixing member 29. The second switching sleeve 461 switches between an engaged state in which the third rotating member 53 meshes with the first output gear tooth 53a and an released state in which the second output gear tooth 53a does not mesh with the first output gear tooth 53a. That is, the second switching sleeve 461 switches between a fixed state in which the ring gear R is connected to the fixing member 29 and a released state in which the ring gear R is not connected to the fixing member 29.

Here, the first to fifth drive states realized by the transfer 12 of the seventh embodiment will be described.

When the transfer 12 of the seventh embodiment is in the first drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the engaged state (directly connected) with the first clutch 410. State), the second clutch 420 is in the released state, the third clutch 430 is in the released state, the fourth clutch 440 is in the released state, the fifth clutch 450 is in the released state, and the first brake 460 is in the engaged state (fixed state).

When the transfer 12 of the seventh embodiment is in the second drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 has the first clutch 410. Engagement state (direct connection state), 2nd clutch 420 in the disengaged state, 3rd clutch 430 in the disengaged state, 4th clutch 440 in the disengaged state, 5th clutch 450 in the engaged state (integrated state), 1st brake 460 Is released. Therefore, in this second drive state, when the power of the motor 30 is transmitted to the front wheel side output shaft 23, as shown in FIG. 28, the three rotating elements have the same rotation speed. Further, in this second drive state, since the first clutch 410 is engaged, the engine 2 and the rear wheel side output shaft 22 are connected so as to be able to transmit power, but the engine 2 is stopped. No power is transmitted to the rear wheel side output shaft 22.

In addition, FIG. 28, FIG. 29, and FIG. 30 show a common line diagram showing the rotational state of the planetary gear device 24, in which the motor 30 is “MG”, the engine 2 is “ENG”, and the sun gear S is “S”. , Carrier C is "C", Ring gear R is "R", 1st clutch 410 is "CL1", 2nd clutch 420 is "CL2", 3rd clutch 430 is "CL3", 4th clutch 440 is "CL4" , The fifth clutch 450 is described as "CL5".

When the transfer 12 of the seventh embodiment is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentiated, and the connection switching device 40 has the first clutch 410. Engagement state (direct connection state), 2nd clutch 420 in the released state, 3rd clutch 430 in the engaged state (distribution state), 4th clutch 440 in the released state, 5th clutch 450 in the released state, 1st brake 460 It will be released.

As described above, in the third drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so that the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without going through the planetary gear device 24. It is transmitted to the shaft 22. Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without shifting. Further, since the planetary gear device 24 is in a differentially distributed state, the power of the motor 30 is distributed and transmitted to the transmission unit 25 and the rear wheel side output shaft 22 via the planetary gear device 24. Therefore, in the third drive state, as shown in FIG. 29, it is possible to control the distribution of the power transmitted to the front wheel side and the rear wheel side by the torque output from the motor 30.

When the transfer 12 of the seventh embodiment is in the fourth drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 has the first clutch 410. Engagement state (direct connection state), second clutch 420 in disengaged state, third clutch 430 in engaged state (distributed state) or disengaged state, fourth clutch 440 in engaged state (distributed state) or disengaged state, fifth The clutch is engaged (integrated) or released.

In this fourth drive state, the planetary gear device 24 whose differential is limited may be connected to the rear wheel side output shaft 22. Therefore, when the third clutch 430 is in the engaged state, the fourth clutch 440 is in the engaged state, and the fifth clutch 450 may be in either the released state or the engaged state. When the third clutch 430 is in the released state, the fourth clutch 440 and the fifth clutch 450 are in the engaged state. When the fourth clutch 440 is in the released state, the third clutch 430 and the fifth clutch 450 are in the engaged state.

In this way, in the fifth drive state, the input shaft 21 is connected to the first rotating member 51, so that the power transmitted from the engine 2 to the input shaft 21 is transmitted to the rear wheel side output shaft 22 via the planetary gear device 24. Be transmitted. Further, since the planetary gear device 24 is in a speed change state, the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22. Similarly, the motor 30 is also connected to the rear wheel side output shaft 22 via the planetary gear device 24 in the speed change state. Therefore, in the fifth drive state, when the power of the motor 30 is transmitted to the rear wheel side output shaft 22, as shown in FIG. 30, the rotation of the motor 30 is changed by the planetary gear device 24 and the rear wheel side output shaft 22 is changed. Will be transmitted to.

As a modification of the seventh embodiment, the functions of the first clutch 410 and the second clutch 420 may be realized by one engaging device. An example of this modification is shown in FIG.

As shown in FIG. 31, in the transfer 12 in the first modification of the seventh embodiment, the connection switching device 40 includes the seventh clutch 470, the third clutch 430, the fourth clutch 440, and the fifth clutch 450. , The first brake 460 is provided. The seventh clutch 470 is the same as the first dog clutch 41 of the fifth embodiment. Therefore, the seventh clutch 470 is in a directly connected state in which the input shaft 21 and the rear wheel side output shaft 22 are connected in the first to fourth drive states, and the input shaft 21 and the sun gear S are connected in the fifth drive state. 2 Input state (shift state) is set.

Further, as a second modification of the seventh embodiment, the functions of the fifth clutch 450 and the first brake 460 are realized by one engaging device, and the third clutch 430 and the fourth clutch 440 are combined. The functions of each may be realized by one engaging device. An example of this second modification is illustrated in FIG.

As shown in FIG. 32, in the transfer 12 in the second modification of the seventh embodiment, the connection switching device 40 includes a seventh clutch 470, an eighth clutch 480, and a ninth clutch 490.

The eighth clutch 480 is a combination of the functions of the fifth clutch 450 and the first brake 460 of the seventh embodiment. The eighth clutch 480 is an engaging device that functions as a distribution switching unit and a speed change switching unit, and is a dog clutch that switches the connection relationship between the fixing member 29, the carrier C, and the ring gear R. The eighth clutch 480 is in an released state (non-fixed state and fifth connected state) in which only the fixed member 29 is connected, an integrated state in which the ring gear R and the carrier C are connected (fourth connected state), and a ring gear. It switches between the fixed state in which R and the fixing member 29 are connected.

The eighth clutch 480 has a distribution switching member and a second switching sleeve 481 as a fixed switching member. The second switching sleeve 481 includes the first output gear tooth 52a of the second rotating member 52, the first output gear tooth 53a of the third rotating member 53, the first gear tooth 481a that meshes with the fixing member 29, and the second rotating member 52. It has a first output gear tooth 52a of the above and a second gear tooth 481b that meshes with the first output gear tooth 53a of the third rotating member 53. The second switching sleeve 481 is moved in the axial direction by the actuator of the eighth clutch 480. Then, the second switching sleeve 481 is in the released state (non-fixed state and the fifth connected state) in which it meshes only with the fixing member 29, and in the state where it does not mesh with the fixing member 29, with the second rotating member 52 and the third rotating member 53. It switches between an integrated state in which it meshes (fourth connection state) and a fixed state in which it meshes with the third rotating member 53 and the fixing member 29 without engaging with the second rotating member 52. That is, the second switching sleeve 481 functions as a second distribution switching member, and can switch between the fourth connection state and the fifth connection state.

The ninth clutch 490 is a combination of the functions of the third clutch 430 and the fourth clutch 440 according to the seventh embodiment. The ninth clutch 490 has a third switching sleeve 491 as a distribution switching member. The ninth clutch 490 is the same as the third dog clutch 43 of the fifth embodiment. That is, the ninth clutch 490 and the third switching sleeve 491 connect the rear wheel side output shaft 22 to the ring gear R and the carrier C in the first non-distributed state (sixth connection state) in which the rear wheel side output shaft 22 is not connected to the ring gear R and the carrier C, and the ring gear R is connected to the carrier C. The second non-distributed state (seventh connected state), the first distributed state (second connected state) in which the rear wheel side output shaft 22 is connected to the ring gear R, and the rear wheel side output shaft 22 are connected to the ring gear R and the carrier C. The second distribution state (third connection state) to be connected is switched between the third distribution state (first connection state) in which the rear wheel side output shaft 22 is connected to the carrier C. That is, the ninth clutch 490 and the third switching sleeve 491 function as the first distribution switching member, and can switch between the first connection state and the second connection state.

When the transfer 12 of this second modification is in the first drive state, the planetary gear device 24 is in the second mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the state where the seventh clutch 470 is directly connected. The 8 clutch 480 is in the fixed state, and the 9th clutch 490 is in the first non-distributed state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53. The third switching sleeve 491 meshes only with the rear wheel side output shaft 22.

When the transfer 12 of the second modification is in the second drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 is the seventh clutch 470. Is in the direct connection state, the eighth clutch 480 is in the integrated state, and the ninth clutch 490 is in the first non-distributed state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53 without meshing with the fixing member 29. The third switching sleeve 491 meshes only with the rear wheel side output shaft 22.

When the transfer 12 of this second modification is in the third drive state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentiated, and the connection switching device 40 is the seventh clutch 470. Is in the direct connection state, the eighth clutch 480 is in the released state, and the ninth clutch 490 is in the first distribution state. That is, the second switching sleeve 481 meshes only with the fixing member 29. The third switching sleeve 491 meshes with the third rotating member 53 and the rear wheel side output shaft 22.

When the transfer 12 of the second modification is in the fourth drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are integrally rotatably connected, and the connection switching device 40 is the seventh clutch 470. Is in the direct connection state, the eighth clutch 480 is in the integrated state, and the ninth clutch 490 is in the third distribution state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53 without meshing with the fixing member 29. The third switching sleeve 491 meshes with the second rotating member 52 and the rear wheel side output shaft 22.

When the transfer 12 of this second modification is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the second input state of the seventh clutch 470. (Shifting state), the eighth clutch 480 is in the fixed state, and the ninth clutch 490 is in the third distribution state. That is, the second switching sleeve 481 meshes with the fixing member 29 and the third rotating member 53. The third switching sleeve 491 meshes with the second rotating member 52 and the rear wheel side output shaft 22.

In the fifth to seventh embodiments, the motor 30 is not limited to a structure arranged on the same axis as the input shaft 21 and the rear wheel side output shaft 22. That is, the motor 30 may be arranged on an axis different from the input shaft 21 and the rear wheel side output shaft 22 and may be connected to the sun gear S via a gear mechanism (for example, a speed reducer). In the fifth to seventh embodiments, the motor 30 may be connected to the first rotating member 51 via the counter gear 32 so as to be able to transmit power as in the first embodiment. In other words, in the first to fourth embodiments, the motor 30 is arranged on the same axis as the input shaft 21 and the rear wheel side output shaft 22 as in the fifth embodiment, and is configured to rotate integrally with the sun gear S. May be done.

Further, in the first to seventh embodiments, the planetary gear device 24 may be configured by a differential device having three rotating elements and capable of performing a differential action between the rotating elements. That is, any differential device may be used as long as any one of the three rotating elements can be fixed. Further, the motor / generator can be described as a rotary electric machine. In short, since the motor 30 is composed of a rotary electric machine (motor generator), it is possible to generate electric power by the power from the engine 2 or regenerative power generation by the power input from the drive wheels. The electric power generated by the motor 30 is stored in the battery. Further, the first power source and the second power source may be either an engine or a rotary electric machine. For example, the first power source may be a rotary electric machine, and the second power source may be an engine. Further, in the first mode, at least the fixing elements may be fixed to the fixing member 29 for the three rotating elements. That is, in the first mode, since the planetary gear device 24 only needs to be in the shifting state, the connection destination between the input element and the output element is not particularly limited. In short, the first mode includes a state in which the first power source is not connected to the input element.

1 vehicle 2 engine (1st power source)
3,3R, 3L Front wheels 4,4R, 4L Rear wheels 10 Power transmission device 11 Transmission 12 Transfer 13 Front propeller shaft 14 Rear propeller shaft 20 Transfer case 21 Input shaft 22 Rear wheel side output shaft (1st output shaft)
23 Front wheel side output shaft (second output shaft)
24 Planetary gear device 25 Transmission part 29 Fixing member 30 Motor 40 Connection switching device 41 1st dog clutch 42 2nd dog clutch 43 3rd dog clutch 44 1st switching sleeve 45 2nd switching sleeve 46 3rd switching sleeve 47 1st friction clutch 48th 2 Friction clutch 51 1st rotating member 52 2nd rotating member 53 3rd rotating member C carrier S sun gear R ring gear

Claims (21)

An input shaft that inputs power from the first power source,
With the second power source
The first output shaft that transmits power to the first drive wheel,
The second output shaft that transmits power to the second drive wheel,
A differential with three rotating elements and
A connection switching device that selectively switches the connection relationship between the input shaft, the first output shaft, the second output shaft, and the three rotating elements.
With
The connection switching device is a power transmission device configured to selectively fix any one of the three rotating elements to a fixing member.
The second power source is connected to a rotating element other than the rotating element fixed to the fixing member by the connection switching device among the three rotating elements.
The differential device can be switched to a plurality of modes by the connection switching device.
The plurality of modes are
One of the three rotating elements is connected to the input shaft, one of the remaining rotating elements is fixed to the fixing member, and the other is fixed to the first output shaft. The connected first mode and
A power transmission device, wherein the three rotating elements include a second power source, a first output shaft, and a second mode connected to the second output shaft, respectively. The three rotating elements include a first rotating element, a second rotating element, and a third rotating element connected to the second power source.
The connection switching device is
An input switching unit that switches the connection destination of the input shaft,
It has a fixed switching portion capable of selectively fixing any one of the three rotating elements to the fixing member.
The input switching unit switches between a first input state in which the input shaft is connected to the first rotating element and a second input state in which the input shaft is directly connected to the first output shaft.
The fixed switching unit switches between a fixed state in which the third rotating element is connected to the fixed member and a non-fixed state in which the third rotating element is rotatably released.
The differential device is in the first mode, the first rotating element is an input element, the second rotating element is an output element connected to the first output shaft, and the third rotating element is fixed to the fixing member. When it becomes a reaction force element, the input switching unit enters the first input state and connects the input shaft to the first rotating element.
When the differential device is in the second mode and the three rotating elements are differentially capable, the input switching unit is in the second input state and the input shaft is directly connected to the first output shaft. The power transmission device according to claim 1. The connection switching device has a distribution switching unit that selectively connects the first output shaft to the second rotating element or the third rotating element.
The distribution switching unit switches between a first connection state in which the first output shaft is connected to the second rotation element and a second connection state in which the first output shaft is connected to the third rotation element. 2. The power transmission device according to claim 2. When the fixed switching unit is in the fixed state and the differential device is in the first mode, the input switching unit can switch between the first input state and the second input state. can be,
When the differential device is in the first mode, if the input switching unit is in the first input state and the distribution switching unit is in the first connection state, the first power source is used. The power and the power of the second power source are distributed to the first drive wheel and the second drive wheel via the differential device, and the rotation of the input shaft and the rotation of the second power source are performed. The power transmission device according to claim 3, further comprising a drive state in which the speed is changed by the differential device and the power is transmitted to the first drive wheel and the second drive wheel. The power transmission according to claim 3 or 4, wherein when the differential device is in the second mode and the three rotating elements are differentially capable, the distribution switching unit is in the second connection state. Device. In the plurality of modes, two of the three rotating elements are connected to each other, and one of the rotating elements is connected to one of the first output shaft and the second output shaft. The power transmission device according to any one of claims 3 to 5, wherein the power transmission device includes the third mode. The distribution switching unit can switch to a third connection state in which the first output shaft is connected to the second rotating element and the third rotating element.
When the distribution switching unit is in the third connection state and the differential device is in the third mode and the three rotating elements are integrally rotated, the input switching unit is in the first input state and the first input state. 2. The power transmission device according to claim 6, wherein the power transmission device can be switched between the two input states. The distribution switching unit
A first distribution switching member that selectively connects the first output shaft to the second rotating element or the third rotating element.
It has a second distribution switching member that selectively connects the second rotating element and the third rotating element.
The first distribution switching member switches between the first connection state, the second connection state, and the third connection state.
The second distribution switching member includes a fourth connection state in which the second rotation element and the third rotation element are connected, and a fifth connection state in which the second rotation element and the third rotation element are not connected. Switch between
When the first distribution switching member is in the third connection state, the differential device is in the third mode, and the three rotating elements are integrally rotated, the input switching unit is in the first input state. It is possible to switch between the second input state and the second distribution switching member, and the second distribution switching member is capable of switching between the fourth connection state and the fifth connection state. The power transmission device according to claim 7. The distribution switching unit
A first distribution switching member that selectively connects the first output shaft to the second rotating element or the third rotating element.
It has a second distribution switching member that selectively connects the second rotating element and the third rotating element.
The first distribution switching member switches between the first connection state and the second connection state.
The second distribution switching member includes a fourth connection state in which the second rotation element and the third rotation element are connected, and a fifth connection state in which the second rotation element and the third rotation element are not connected. Switch between
When the second distribution switching member is in the fourth connection state, the differential device is in the third mode, and the three rotating elements are integrally rotated, the input switching unit is in the first input state. It is possible to switch between the second input state, and the first distribution switching member is capable of switching between the first connection state and the second connection state. The power transmission device according to claim 6. The distribution switching unit can switch to a sixth connection state in which the first output shaft is not connected to either the second rotation element or the third rotation element.
When the differential device is in the first mode due to the fixed switching unit being in the fixed state, the input switching unit may switch between the first input state and the second input state. The power transmission device according to any one of claims 3 to 9, wherein the distribution switching unit can select the sixth connection state. The distribution switching unit can switch to a seventh connection state in which the second rotating element and the third rotating element are connected without being connected to the first output shaft.
When the three rotating elements of the differential device rotate integrally when the distribution switching unit is in the seventh connection state, the input switching unit is in the first input state and the second input state. The power transmission device according to claim 10, wherein the power transmission device can be switched between. The distribution switching unit can switch to a sixth connection state in which the first output shaft is not connected to either the second rotation element or the third rotation element.
When the second distribution switching member is in the fourth connection state, the differential device is in the third mode, and the three rotating elements are integrally rotated, the input switching unit is in the first input state. The power transmission device according to claim 8 or 9, wherein it is possible to switch between the second input state and the distribution switching unit can select the sixth connection state. The connection switching device has a third distribution switching member that selectively connects the second rotating element and the second output shaft.
The third distribution switching member is between an eighth connection state in which the second rotating element and the second output shaft are connected and a ninth connection state in which the second rotation element and the second output shaft are separated from each other. The power transmission device according to claim 8 or 9, wherein the power transmission device is switched by. When the differential device is in the first mode, the input switching unit is in the second input state, the first distribution switching member is in the first connection state, and the third distribution switching member is in the ninth connection state. In this case, the power from the first power source is not transmitted to the first output shaft and the second output shaft, and the power of the second power source is not transmitted to the second output shaft. The power transmission device according to claim 13, wherein the power of the second power source is in a drive state in which the power is transmitted to the first output shaft via the differential device. When the second distribution switching member is in the fourth connection state and the differential device is in the third mode and the three rotating elements are integrally rotated, the third distribution switching member is in the ninth connection state. The power transmission device according to claim 13, wherein the first distribution switching member can switch between the first connection state and the second connection state. The connection switching device has a third distribution switching member that selectively connects the second rotating element and the second output shaft.
The third distribution switching member is between an eighth connection state in which the second rotation element and the second output shaft are connected and a ninth connection state in which the second rotation element and the second output shaft are separated from each other. Switch with
When the first distribution switching member is in the third connection state, the differential device is in the third mode, and the three rotating elements are integrally rotated, the third distribution switching member is in the ninth connection state. The power transmission device according to claim 8, wherein the power transmission device is characterized in that. The fixed switching unit is
A first engagement that switches between an engaged state in which the third rotating element is used as an engaging element and the third rotating element is connected to the fixing member and an released state in which the third rotating element is rotatably released. Have a device,
The distribution switching unit
The second rotating element and the third rotating element are used as engaging elements, the engaging state in which the second rotating element and the third rotating element are engaged, and the second rotating element as the third rotating element. The power transmission device according to claim 8 or 9, wherein the power transmission device has a second engaging device that switches between a release state and a release state that is relatively rotatably released. The fixed switching portion is between an engaged state in which the third rotating element is used as an engaging element and the third rotating element is connected to the fixing member and an released state in which the third rotating element is rotatably released. Consists of a first engaging device that switches with
The second distribution switching member has the second rotating element and the third rotating element as engaging elements, and engages the second rotating element with the third rotating element, and the second rotation. The power transmission device according to claim 8 or 9, wherein the power transmission device comprises a second engaging device that switches between an released state in which the element is rotatably released relative to the third rotating element. A transmission unit for transmitting power to the second output shaft is further provided.
The first distribution switching member has a first distribution state in which the second rotating element is connected to the first output shaft when the first output shaft is connected to the transmission unit, and the transmission of the first output shaft. The first non-distributive state in which the second rotating element is connected to the first output shaft when connected to the unit, and the third rotating element is connected to the first output shaft when the first output shaft is not connected to the transmission unit. Switch between the second non-distributed state connected to the output shaft,
The second distribution switching member includes an integrated state in which the second rotating element and the third rotating element are connected, a fixed state in which the third rotating element is connected to the fixing member, and the second rotating element. The power transmission device according to any one of claims 13 to 16, wherein the power transmission device switches between the second distribution state connected to the transmission unit. A transmission unit for transmitting power to the second output shaft is further provided.
The first distribution switching member can selectively connect the first output shaft to the transmission unit, and is connected to the input shaft when the first output shaft is connected to the transmission unit. The first distribution state in which the second rotating element is connected to the first output shaft, and the non-distributive state in which the input shaft is connected to the first output shaft when the first output shaft is not connected to the transmission unit. Switch between distribution states
The second distribution switching member can selectively connect the second rotating element to the transmitting portion, and also has an integrated state in which the second rotating element and the third rotating element are connected. Of claims 13 to 16, the third rotating element is switched between a fixed state in which the third rotating element is connected to the fixing member and a second distribution state in which the second rotating element is connected to the transmission unit. The power transmission device according to any one item. The differential device is a single pinion type planetary gear device.
The first rotating element is a sun gear.
The second rotating element is a carrier and
The power transmission device according to any one of claims 2 to 20, wherein the third rotating element is a ring gear.

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