JP2012013184A - Driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device that can sufficiently lubricate a planetary gear device and a parking lock mechanism stored in a case and reduce the size of the device than a conventional device with simpler structure than before.SOLUTION: The driving device includes: a motor generator MG1; a motor generator MG2; a planetary gear mechanism 13; a differential; a gear mechanism 16; the parking lock mechanism 17 which can be in a lock state for locking power transmission of the gear mechanism 16 or be in an unlock state for allowing the power transmission; a transaxle housing; a transaxle case 22; and a transaxle rear cover. The driving device is configured so that each lubricating element is lubricated by lubricating oil scraped up by a differential ring gear 58. The transaxle case 22 has a planetary gear mechanism housing case 24 and an attachment boss 92. The planetary gear mechanism housing case 24 has a notch 24d formed oppositely to the attachment boss 92.

Description

  The present invention relates to a drive device that drives a rotating shaft of a vehicle, and more particularly to a drive device that lubricates a lubricating element with lubricating oil scraped up by a gear mechanism.

  Conventionally, as a drive device of this type, a power transmission element connected to a drive source, a casing for storing the power transmission element, and an upper portion of the casing so as to be positioned above the power transmission element are used to temporarily supply lubricating oil. There is a known one that includes a storage section that stores automatically and a lubricating oil supply passage that supplies lubricating oil that naturally flows down from the storage section to a power transmission element (see, for example, Patent Document 1).

  In this drive device, the lubricating oil supply path has an inclined portion that causes the lubricating oil stored in the storing portion to naturally flow toward the lower portion of the casing. The lubricating oil supply path has an opening that is formed in the middle of the inclined portion and opens in a direction intersecting the streamline direction of the lubricating oil flowing down the inclined portion, and the lubricating oil introduced through the opening. Has an oil passage leading to the power transmission element.

  In this drive device, the opening that opens in the direction intersecting the streamline direction of the lubricating oil flowing down the inclined portion is provided in the middle of the inclined portion, and the lubricating oil flowing down the inclined portion is branched by the opening. Thus, only a part of the lubricating oil is supplied to the power transmission element through the opening.

  For this reason, even when the drive device is in the normal operation region, the lubricating oil pumped up by the gear mechanism is not supplied to the power transmission element more than necessary, and the power transmission element is affected by the resistance of the lubricating oil. Therefore, the stirring loss and the deterioration of the fuel consumption which are increased due to this are prevented. As a result, it is possible to prevent the lubricant from being supplied more than necessary to the power transmission element without reducing the diameter of the opening.

  Further, even in a low temperature operation region where the lubricating oil has a high viscosity, an amount of lubricating oil necessary for preventing seizure of the power transmission element and maintaining durability is supplied. In this drive device, the lubricating oil scooped up by the gear mechanism is supplied to the power transmission element in an appropriate amount regardless of the operation region.

  Further, as a conventional drive device, an engine, a first electric motor arranged coaxially with the engine, an output member arranged coaxially connected to the engine and the first electric motor, and an output member It is known that a countershaft connected to a wheel with a parallel shaft and a parking lock mechanism that locks the rotation of the wheel, and a parking gear of the parking lock mechanism is arranged on an output member (see, for example, Patent Document 2). ).

  This drive device lubricates the lubricating element with the lubricating oil scraped up by the gear mechanism, and can maintain a parking lock maintaining state for maintaining the vehicle stopped state and a parking lock releasing state for releasing the vehicle stopped state. A locking mechanism is provided. In this drive device, the parking gear is disposed at a portion where torque amplification is smaller on the upstream side in the flow of power transmission as compared with the conventional configuration in which the parking gear is disposed on the countershaft. As a result, the torque applied to the parking lock mechanism that locks the rotation of the parking gear is reduced, and the related parts of the parking lock mechanism are reduced in size.

JP 2009-222161 A JP 2001-355727 A

However, in the conventional drive device provided with the lubricating oil supply path, since the lubricating oil guide path called the lubricating oil supply path for supplying the lubricating oil that naturally flows down from the storage portion to the power transmission element is formed, the structure is There is a problem that it becomes complicated. That is, the lubricating oil supply path is formed in the inclined portion that naturally flows the lubricating oil stored in the storage portion toward the lower portion of the casing, and the flow line of the lubricating oil that is formed in the middle portion of the inclined portion and flows down the inclined portion. Since it has an opening that opens in a direction that intersects the direction and also has an oil passage that guides the lubricating oil introduced through this opening to the power transmission element, the structure is complicated.
Further, since the lubricating oil scraped up by the gear mechanism is supplied to the planetary gear device housed in the case via the lubricating oil supply path, it cannot be supplied directly from the storage unit to the planetary gear device. After being scraped up by the gear mechanism, there is a possibility that it cannot be promptly supplied from the storage unit to the planetary gear unit.

  Further, in the conventional drive device provided with the parking lock mechanism, the opening of the case that accommodates the planetary gear device is formed at the meshing portion of the parking gear and the parking pole provided at the lower part of the case. There has been a problem that the lubricating oil is difficult to be supplied to the planetary gear device in the case. That is, the lubricating oil that has been scraped up by the gear mechanism and stored in the storage section, or the lubricating oil that has been scattered by the gear mechanism has been difficult to reach the planetary gear unit in the case. For this reason, there is a fear that the planetary gear device becomes difficult to lubricate and the lubrication becomes insufficient.

  In addition, since the parking gear is provided in the planetary gear device, and the meshing portion of the parking gear and the parking pole is disposed at the lower part of the case that houses the planetary gear device, the parking gear is parked in the direction orthogonal to the axial direction of the planetary gear device. Space for the lock mechanism is required. For this reason, the housing of the driving device becomes large in a direction orthogonal to the axial direction of the planetary gear device, and the miniaturization is insufficient.

  The present invention has been made to solve the conventional problems as described above, and can sufficiently lubricate the planetary gear device and the parking lock mechanism housed in the case with a simpler structure than the conventional structure. Another object of the present invention is to provide a drive device that can be made smaller than before.

  In order to solve the above problems, the drive device according to the present invention is (1) a rotating electrical machine having a rotating shaft, a planetary gear mechanism connected to the rotating shaft, and an output for outputting power output from the rotating electrical machine. A shaft, a gear mechanism that transmits the power between the planetary gear mechanism and the output shaft, a locked state that prevents transmission of the power of the gear mechanism, and an unlocked state that allows transmission of the power. A parking lock mechanism that can be taken, and a case that houses the rotating electrical machine, the output shaft, the planetary gear mechanism, the gear mechanism, and the parking lock mechanism, and is lubricated by the lubricating oil scraped up by the gear mechanism. In which the case is attached to the planetary gear mechanism housing case for housing the planetary gear mechanism and the parking lock mechanism. And a mounting boss that protrudes in the axial direction of the rotating shaft, the planetary gear mechanism housing is characterized by having an opening formed so as to face the mounting boss.

With this configuration, in the drive device according to the present invention, the planetary gear mechanism and the parking lock mechanism housed in the case are sufficiently lubricated with a simpler structure than before, and are smaller than before.
That is, the lubricating oil in the case scraped up by the gear mechanism is transmitted through the inner wall above the case and vigorously distributed above the planetary gear mechanism housing case. The case of the drive device according to the present invention has a planetary gear mechanism housing case and a mounting boss to which a parking lock mechanism is attached, and the planetary gear mechanism housing case has an opening formed to face the mounting boss. Therefore, the lubricating oil that circulates vigorously above the case collides with the mounting boss and scatters, and preferably flows promptly through the opening of the planetary gear mechanism housing case into the inside thereof. Lubricating oil flowing in from the opening is scraped up by the planetary gear mechanism in the planetary gear mechanism housing case and supplied to each lubricating element in the planetary gear mechanism housing case, whereby each lubricating element is lubricated. As a result, the necessity of forming a lubricating oil guide path as a lubricating oil supply path in a conventional driving apparatus is eliminated, so that the structure is not complicated by the formation of the lubricating oil supply path, and the driving apparatus according to the present invention. This case has a simpler structure than before, and each internal lubricating element is sufficiently lubricated quickly.

  When the rotational speed (rpm) of the drive device according to the present invention increases, the amount of lubricating oil scraped up by the gear mechanism increases, and the flow rate of the lubricating oil flowing above the planetary gear mechanism housing case also increases. Then, it collides with the mounting boss and scatters, passes through the opening of the planetary gear mechanism housing case, the amount of lubricating oil flowing into the inside increases, and each internal lubricating element is sufficiently lubricated.

Further, the case has a configuration having a mounting boss formed so as to protrude in the axial direction of the rotating shaft so as to attach the parking lock mechanism, and the planetary gear mechanism housing case has an opening formed so as to face the mounting boss. The drive device according to the present invention is smaller and lower in cost than conventional ones.
That is, an opening is formed in the planetary gear mechanism housing case that houses the planetary gear mechanism, and the mounting boss is formed so as to face the opening. Therefore, a part of the mounting boss faces the planetary gear. It is possible to arrange the mechanism housing case so as to overlap the opening portion of the mechanism housing case. As a result, the space for arranging the mounting boss and the planetary gear mechanism housing case can be reduced. The parking lock mechanism can be installed compactly in the case, and the drive device can be made smaller than before.

  In the driving apparatus according to (1), (2) the case includes a lubricating oil storage tank that stores the lubricating oil scraped up by the gear mechanism, and the lubricating oil storage tank is attached to the mounting boss. It has a lubricating oil dropping hole formed above the mounting boss so as to drop the lubricating oil.

  With this configuration, the case has a lubricating oil storage tank that stores the lubricating oil scraped up by the gear mechanism, and the lubricating oil storage tank is formed above the mounting boss so as to drop the lubricating oil onto the mounting boss. Since the lubricating oil dripping hole is provided, the necessity of forming a lubricating oil guide portion called a lubricating oil supply path in a conventional driving device is eliminated. The formation of such a lubricating oil supply path does not complicate the structure, and sufficient lubricating oil is supplied to each internal lubricating element with a simpler structure than before.

  Further, when the drive device is in a stopped state, the internal lubricating oil is stored in a part of the lubricating oil storage tank. When the driving device starts driving in this state, the lubricating oil stored in the lubricating oil storage tank is dropped from the lubricating oil storage tank through the lubricating oil dropping hole due to an impact such as vibration at the time of starting. Then, the dropped lubricating oil hits the mounting boss and scatters, enters the inside of the planetary gear mechanism housing case, and lubricates each lubricating element inside the planetary gear mechanism.

  Therefore, even when the drive device with a relatively small supply amount of lubricating oil is started or immediately after starting, each lubricating element inside the planetary gear mechanism and each lubricating element of the parking lock mechanism are suitably lubricated.

  When the rotational speed (rpm) of the drive device increases, the flow rate of the lubricating oil scraped up by the gear mechanism increases, and the amount of the lubricating oil flowing into the lubricating oil storage tank also increases. The lubricating oil that has flowed into the lubricating oil storage tank is dripped vigorously from the lubricating oil dripping hole. The amount of the dropped lubricating oil hits the mounting boss also increases, and the amount of lubricating oil entering the inside from the opening of the planetary gear mechanism housing case also increases.

  Therefore, even when the rotational speed of the drive device increases, sufficient lubricating oil is quickly supplied into the planetary gear mechanism, and each lubricating element is lubricated. As a result, sufficient lubricating oil is supplied to the inside of the planetary gear mechanism and the lubricating elements constituting the driving device from the time when the driving device rotates to the time of high rotation.

  Also, since the opening of the planetary gear mechanism housing case is formed to face the mounting boss formed below the lubricating oil dropping hole, the planetary gear mechanism housing case flows into the planetary gear mechanism housing case, and the planetary gear mechanism rotates. Thus, the lubricating oil in the planetary gear mechanism housing case scraped up by is not scattered outside from the opening, and the optimal amount of lubricating oil is ensured.

  (3) In the drive device according to (1) or (2), (3) the planetary gear mechanism is connected to the rotating shaft and rotates with the rotating electrical machine, a pinion gear meshing with the sun gear, and the pinion gear rotating A free-supporting carrier, and a ring gear having an internal tooth meshing with the pinion gear, the gear mechanism supporting a first gear coupled to the ring gear of the planetary gear mechanism; A parking gear mechanism, comprising: a second rotating shaft that supports a second gear that meshes with the first gear; and a third gear that is supported by the second rotating shaft and meshes with a ring gear of a differential that forms the output shaft. Is a parking gear provided on the second rotating shaft, an engagement state that engages with the parking gear, and a non-engagement that does not engage with the parking gear. And having a parking pawl capable of having a state.

  With this configuration, the lubricating oil scraped up by the gear mechanism collides with the mounting boss and scatters, flows into the inside through the opening of the planetary gear mechanism housing case, and rotates by the ring gear constituting the planetary gear mechanism. It is scraped up in the planetary gear mechanism housing case. Lubricating elements, such as a sun gear, a pinion gear, and a carrier, are lubricated by the lubricated oil. The gear mechanism includes a first rotating shaft that supports the first gear, a second rotating shaft that supports the second gear, and a third gear that meshes with the ring gear of the differential that forms the output shaft, Since the parking lock mechanism has a parking gear provided on the second rotating shaft and a parking pawl that engages with the parking gear, the space for arranging the mounting boss and the planetary gear mechanism housing case can be reduced. it can. As a result, the parking lock mechanism can be installed compactly in the case, and the drive device can be reliably downsized.

  (4) In the driving apparatus according to (3), (4) the first rotating shaft is configured by a hollow rotating shaft, the carrier of the planetary gear mechanism is connected to a driving shaft of an internal combustion engine, and the first rotating shaft is It is connected to a connecting shaft that is rotatably inserted into one rotating shaft, and is configured to rotate together with the drive shaft. The gear mechanism has a third rotating shaft that supports a fourth gear that meshes with the second gear. The rotating electrical machine includes a first rotating electrical machine connected to the rotating shaft and a second rotating electrical machine connected to the third rotating shaft and outputting power.

  With this configuration, the drive device is driven by power output from at least one of the first rotating electrical machine, the second rotating electrical machine, and the internal combustion engine, and the parking lock mechanism is provided on the second rotating shaft. Since the parking gear and the parking pawl that engages with the parking gear are provided, the space for arranging the mounting boss and the planetary gear mechanism housing case can be reduced. As a result, the parking lock mechanism can be installed compactly in the case, and the drive device can be reliably downsized.

  According to the present invention, there is provided a drive device that can sufficiently lubricate a planetary gear device and a parking lock mechanism housed in a case with a simpler structure than before, and can be made smaller than before. be able to.

It is a block diagram of the drive device which concerns on 1st Embodiment of this invention, and the meshing part of a drive pinion and a differential ring gear is shown in the lower part of a figure. It is a fragmentary sectional view of the drive device concerning a 1st embodiment of the present invention. It is a top view of the state which removed the transaxle housing of the drive device which concerns on 1st Embodiment of this invention. It is a top view which expands and shows a part of the state which removed the transaxle housing of the drive device which concerns on 1st Embodiment of this invention. FIG. 5 is a partial side view of a parking lock mechanism of the drive device as viewed from the direction A in FIG. 4. FIG. 5 is a partial side view of the parking lock mechanism of the drive device as viewed from the direction B in FIG. 4, showing a state where the switching mechanism is in the parking position. FIG. 5 is a partial side view of the parking lock mechanism of the drive device as viewed from the direction B in FIG. 4, showing a state where the switching mechanism is in a non-parking position. It is a top view which expands and shows a part of the state which removed the transaxle housing of the drive device which concerns on 1st Embodiment of this invention, and shows the state which has a switching mechanism in a non-parking position. FIG. 5 is a partial side view of a parking lock mechanism of the drive device as viewed from the direction C in FIG. 4. It is sectional drawing of the electric actuator of the drive device which concerns on 1st Embodiment of this invention. It is a top view of the electric actuator of the drive device concerning a 1st embodiment of the present invention. It is a top view of the state which removed the transaxle housing of the drive device concerning a 1st embodiment of the present invention, and shows the state where the drive device stopped. It is a top view of the state which removed the transaxle housing of the drive device concerning a 1st embodiment of the present invention, and shows the state where the drive device is operating. FIG. 5 is a partial side view of the parking lock mechanism of the drive device as viewed from the direction B of FIG. 4, showing a state where the switching mechanism is in a non-parking position and the lubricating oil is flowing. The partial side view of the parking lock mechanism of the drive device which concerns on 2nd Embodiment of this invention is shown. The partial side view of the parking lock mechanism of the drive device concerning a 2nd embodiment of the present invention is shown, and the change mechanism is in the state which is in the non-parking position, and shows the state where lubricating oil is flowing. It is a top view of the state which removed the transaxle housing of the drive device which concerns on 3rd Embodiment of this invention. The partial side view of the parking lock mechanism of the drive device concerning a 3rd embodiment of the present invention is shown, and the state where a change mechanism is in a non-parking position is shown. It is a top view of the state which removed the transaxle housing of the drive device concerning a 3rd embodiment of the present invention, and shows the state where the drive device is operating. The partial side view of the parking lock mechanism of the drive device concerning a 3rd embodiment of the present invention is shown, and the change mechanism is in the state which is in the non-parking position, and shows the state where lubricating oil is flowing.

  Hereinafter, first to third embodiments of a driving apparatus according to the present invention will be described with reference to the drawings.

(First embodiment)
FIGS. 1 to 11 are diagrams showing the configuration of the driving apparatus 10 according to the first embodiment of the present invention. FIGS. 12 to 14 show the operating state of the driving apparatus 10 according to the first embodiment of the present invention. FIG.
As shown in FIG. 1, the drive device 10 constitutes a transaxle of a hybrid vehicle 1 driven by either or both of an engine driven by fuel and a motor generator as a rotating electrical machine. The vehicle 1 is a front wheel drive vehicle (FF), an engine 2 as an internal combustion engine, a drive device 10, a left and right drive shaft 3 connected to the drive device 10, and a left and right drive shaft 3 And left and right wheels 4 connected to each other, and an electronic control unit (ECU) (not shown) for controlling the engine 2 and the drive device 10.

  This electronic control unit includes a CPU (Central Processing Unit), a ROM for storing processing programs, a RAM for temporarily storing data, an EEPROM including an electrically rewritable nonvolatile memory, an A / An input port including a D converter and a buffer, and an output port are included.

  The drive device according to the present invention is not limited to such a hybrid transaxle, but may be a transaxle mounted on a so-called electric vehicle driven by a motor as a rotating electrical machine, and is driven by fuel. It may be a transaxle mounted on a fuel vehicle equipped with an engine.

  The drive device 10 is connected to a flywheel 2b of a crankshaft 2a as a drive shaft of the engine 2 and absorbs torque fluctuation of the crankshaft 2a, and is connected to the transaxle damper 11 at one end of the engine 2. An input shaft 12 as a connecting shaft to which power is input, a planetary gear mechanism 13 connected to the other end of the input shaft 12, and a planetary gear mechanism 13 connected to mainly charge a battery and supply driving power. A motor generator MG1 as a first rotating electrical machine and a motor generator MG2 as a second rotating electrical machine that mainly outputs power are configured.

  Drive device 10 includes differential 15 as an output shaft that outputs power transmitted from engine 2 and motor generators MG1, MG2, between engine 2, motor generator MG1 and differential 15, and motor generator MG2. The gear mechanism 16 includes a plurality of gears and a shaft so as to transmit power to and from the differential 15.

  The drive device 10 includes a parking lock mechanism 17 that can be in a locked state that prevents transmission of power from the gear mechanism 16 and an unlocked state that allows transmission of power, a planetary gear mechanism 13, motor generators MG1, MG2, A transaxle housing 21, a transaxle case 22, a transaxle rear cover 23 as a case for accommodating the differential 15, the gear mechanism 16 and the parking lock mechanism 17, and a planetary gear which is attached to the transaxle case 22 and accommodates the planetary gear mechanism 13. A mechanism housing case 24 and a mounting bolt 25 for attaching the planetary gear mechanism housing case 24 to the transaxle case 22 are configured.

  Further, the drive device 10 includes ball bearings 31a and 31b that support the motor generator MG1, ball bearings 32a and 32b that support the motor generator MG2, tapered roller bearings 33a and 33b that support the differential 15, and a gear mechanism 16. The ball bearings 34a, 34b, 35a, 35b to be supported and the tapered roller bearings 36a, 36b are configured.

  As shown in FIGS. 1 and 2, the planetary gear mechanism 13 includes a ring gear 41 coupled to the gear mechanism 16, a sun gear 42 arranged in the ring gear 41 with the axis line coincident with the axis line of the ring gear 41, and a ring gear. The carrier 43 is inserted between the ring gear 41 and the sun gear 42 so as to coincide with the axes of the gear 41 and the sun gear 42, and is rotatably supported by the carrier 43 and meshes with the ring gear 41 and the sun gear 42. A pinion gear 44 is included.

  The carrier 43 is connected to the crankshaft 2 a via the input shaft 12 and the transaxle damper 11 so that the power of the engine 2 is input. The sun gear 42 is connected to the motor generator MG1. The planetary gear mechanism 13 constitutes a so-called power split mechanism that splits the power of the engine 2 into the motor generator MG1 and the gear mechanism 16.

  The motor generator MG1 has both a function of an electric motor for driving the vehicle 1 and a function of a generator for charging the battery, but mainly performs charging of the battery and supply of driving power. The electronic control unit is configured so as to include a stator and a rotor.

  The stator has a core fixed to the inner peripheral portion of the transaxle case 22, and the outer periphery of the core is wound so that the windings have three phases in order to generate a magnetic field. The rotor has an MG1 rotor shaft 26 and permanent magnets having N and S poles provided around the MG1 rotor shaft 26. The MG1 rotor shaft 26 is rotatably supported by a ball bearing 31 a supported by the transaxle rear cover 23 and a ball bearing 31 b supported by the transaxle case 22. Further, the MG1 rotor shaft 26 is connected to the sun gear 42 of the planetary gear mechanism 13 at one end thereof, and rotates together with the sun gear 42.

  With this configuration, when a three-phase alternating current is passed through the three-phase winding of the stator based on a command from the electronic control unit, a rotating magnetic field is generated in the motor generator MG1, and this rotating magnetic field becomes the rotational position and speed of the rotor. The permanent magnets arranged in the rotor are also attracted to the rotating magnetic field to generate torque. The magnitude of the generated torque is controlled by the current, and the magnitude of the rotational speed is controlled by the frequency of the AC power supply.

  The motor generator MG1 is connected to an inverter (not shown), and is switched by an electronic control unit to either an electric motor or a generator via a switching element constituting the inverter. It is supposed to function.

  Motor generator MG2 has the same configuration and function as motor generator MG1, and is mainly controlled by an electronic control unit as a power source that outputs power, and includes a stator and a rotor. .

  Similar to motor generator MG1, this stator has a core fixed to the inner peripheral portion of transaxle case 22, and the outer periphery of this core is wound so that the winding has three phases to generate a magnetic field. It has been turned. The rotor has an MG2 rotor shaft 27 and permanent magnets having N and S poles provided around the MG2 rotor shaft 27. The MG2 rotor shaft 27 is rotatably supported by a ball bearing 32 a supported by the transaxle rear cover 23 and a ball bearing 32 b supported by the transaxle case 22. Further, the MG2 rotor shaft 27 is connected to the gear mechanism 16 at one end thereof and outputs power to the gear mechanism 16.

  Similarly to motor generator MG1, motor generator MG2 is connected to an inverter (not shown), and is switched between an electric motor and a generator by an electronic control unit via an inverter constituted by a switching element. Or it will work with either generator.

  The differential 15 includes a hollow differential case 15a. The differential case 15a is rotatable by a tapered roller bearing 33a provided in the transaxle case 22 and a tapered roller bearing 33b provided in the transaxle housing 21. It is supported.

  A pinion shaft 15p is supported on the differential case 15a, and a pair of pinion gears 15g is rotatably supported on the pinion shaft 15p. The pair of pinion gears 15g and the pair of side gears 15s mesh with each other, and the left and right drive shafts 3 are connected to the side gears 15s, respectively, and power is input from the gear mechanism 16 via the left and right drive shafts 3. Are output to the left and right wheels 4. The differential 15 allows a difference in rotation between the left and right wheels 4 that occurs when the vehicle 1 changes direction or corners.

  The gear mechanism 16 includes a hollow shaft 51 that is connected to the ring gear 41 of the planetary gear mechanism 13 and through which the input shaft 12 is inserted, a counter drive gear 52 that is supported by the hollow shaft 51, and a counter driven gear 53 that meshes with the counter drive gear 52. The counter shaft 54 that supports the counter driven gear 53 and the drive pinion 55 that is supported by the counter shaft 54 are configured.

  The gear mechanism 16 is connected to a reduction gear 56 that meshes with the counter driven gear 53, and the MG2 rotor shaft 27 of the motor generator MG2, and meshes with the reduction shaft 57 that supports the reduction gear 56, the drive pinion 55, and the differential 15 differential. And a differential ring gear 58 fixed to the case 15a.

The hollow shaft 51 is rotatably supported by a ball bearing 34 a provided in the transaxle case 22 and a ball bearing 34 b provided in the transaxle housing 21.
The counter shaft 54 is rotatably supported by a tapered roller bearing 36 a provided in the transaxle case 22 and a tapered roller bearing 36 b provided in the transaxle housing 21.
The reduction shaft 57 is rotatably supported by a ball bearing 35 a provided in the transaxle case 22 and a ball bearing 35 b provided in the transaxle housing 21.

  A reduction gear 56 that meshes with the counter-driven gear 53 and a differential ring gear 58 that meshes with the drive pinion 55 have a speed reducing function for reducing the rotation of the motor generator MG2.

  Further, the differential ring gear 58 is adapted to scoop up the lubricating oil stored in the lower part of the case including the transaxle housing 21, the transaxle case 22, and the transaxle rear cover 23 to the upper part of the case. The lubricating oil scooped up by the differential ring gear 58 lubricates the planetary gear mechanism 13, the gear mechanism 16, and the ball bearings 31 a and 31 b and the tapered roller bearings 33 a and 33 b constituting the driving device 10. ing.

  In addition, the counter drive gear 52 which comprises the gear mechanism 16 of the drive device 10 which concerns on 1st Embodiment comprises the 1st gear in the drive device which concerns on this invention, The hollow shaft 51 comprises a 1st rotating shaft, The counter driven gear 53 constitutes the second gear, the counter shaft 54 constitutes the second rotating shaft, the drive pinion 55 constitutes the third gear, the reduction gear 56 constitutes the fourth gear, and the reduction shaft 57 constitutes the second gear. 3 rotation shafts are configured.

  As shown in FIGS. 3 to 8, the parking lock mechanism 17 is connected to the electric actuator 61, the parking shaft 62 connected to the electric actuator 61, the switching mechanism 63 connected to the parking shaft 62, and the switching mechanism 63. The lock mechanism 64 is configured.

  The parking lock mechanism 17 constitutes a so-called shift-by-wire shift control system that detects a shift operation input of the driver of the vehicle 1 using a sensor or a switch and selects a shift position according to the detection signal. . The parking lock mechanism 17 switches a shift position including a parking position and a non-parking position other than the parking position.

  In the parking lock mechanism 17, when a parking switch provided in the driver's seat of the vehicle 1 is operated and turned ON, the parking position is switched to the parking position, the counter shaft 54 of the gear mechanism 16 is locked, and the vehicle 1 is stopped. Configured to be maintained. Further, when the parking switch is released and turned OFF, the vehicle is switched to the non-parking position, the counter shaft 54 of the gear mechanism 16 is unlocked, and the vehicle 1 is allowed to travel.

  As shown in FIGS. 10 and 11, the electric actuator 61 includes a case 61a, a cover 61b, a motor 61c, a connector 61d, a bracket 61f in which a through hole 61e is formed, and a pair of bearings 61g. Has been.

The case 61a accommodates the motor 61c inside, and is fixed to the transaxle case 22 via a bracket 61f.
The cover 61b is fixed to the case 61a and covers the case 61a.

The motor 61c is configured by an electric motor such as a DC motor or SR motor (Switched Reluctance Motor) having a stator 61h having a permanent magnet or an electromagnet, a rotor 61i formed by windings, and a rotor shaft 61j.
The rotor shaft 61j is rotatably supported by the case 61a and the cover 61b via a pair of bearings 61g.
The motor 61c is connected to the above-described ECU via a connector 61d and is controlled by the ECU.

  As shown in FIG. 4, the parking shaft 62 has one end 62a connected to the rotor shaft 61j of the electric actuator 61, and the power output from the motor 61c is transmitted to the switching mechanism 63 connected to the large diameter portion 62b. It has come to be. As shown in FIG. 6, the large-diameter portion 62b is formed with an outer shape larger than the one end portion 62a.

  4 to 8, the switching mechanism 63 includes a detent plate 71, a detent spring 72, a spring retainer 73, a rivet 74 that fixes the spring retainer 73 to the detent spring 72, a detent spring 72, and a spring retainer. And a mounting bolt 75 for attaching 73 to the transaxle case 22. The switching mechanism 63 is configured to switch between a parking position and a shift position including a non-parking position other than the parking position by the power of the electric actuator 61.

  As shown in FIGS. 6 and 7, the detent plate 71 is connected to a connecting portion 71 a that is connected to the large diameter portion 62 b of the parking shaft 62, engaging recesses 71 b and 71 c that are engaged to the detent spring 72, and a lock mechanism 64. 71d to be connected.

The connecting portion 71a is fitted to a fitting hole detent 62c formed in the large diameter portion 62b of the parking shaft 62, and the parking shaft 62 and the detent plate 71 are connected so as to rotate together.
The engaging recess 71b has a semicircular recess and is configured such that when the engaging recess 71b is engaged with the detent spring 72, the switching mechanism 63 is in the non-parking position.
Similar to the engagement recess 71b, the engagement recess 71c has a semicircular recess, and when engaged with the detent spring 72, the switching mechanism 63 is configured to be in the parking position.

  The connecting portion 71d is integrally formed by bending with respect to the connecting portion 71a, and has a through hole 71e having a notch.

  4, 6 to 8, the detent spring 72 has a main body 72a and a roller portion 72b, and the roller portion 72b engages with the engagement recesses 71b and 71c of the detent plate 71, respectively. At this time, the roller portion 72b and the engagement recesses 71b and 71c are engaged with each other with a predetermined contact pressing force (N).

The main body 72a is formed of a leaf spring made of an elastic material, and one end thereof is formed integrally with the roller portion 72b. The main body 72a is integrated with the spring retainer 73 by a rivet 74 at the other end.
The roller portion 72b has a roller 72c that is rotatably supported, and slides smoothly along the detent plate 71, and reliably engages with the engagement recesses 71b and 71c of the detent plate 71. It has become.

  The spring retainer 73 is fixed to the transaxle case 22 by a mounting bolt 75 together with the detent spring 72. The spring retainer 73 restricts the deformation of the portion of the main body 72a that is fixed by the mounting bolt 75 when the main body 72a of the detent spring 72 is elastically deformed.

  As shown in FIGS. 4 and 6 to 9, the lock mechanism 64 includes a parking rod 81, a parking cam 82, a cam spring 83, a parking pole 84, a parking gear 85, a rod cover 86, and a parking pole. Rotating shaft 87 that rotatably supports 84, supporting plate 88 that supports rotating shaft 87, pole spring 89, and mounting bolt 64 a that attaches supporting plate 88 to transaxle rear cover 23. Yes.

  The parking rod 81 is made of a rod-shaped member, and is bent so as to be orthogonal to the axial direction thereof. The parking rod 81 is movable in the axial direction with respect to the connecting end portion 81a connected to the connecting portion 71d of the detent plate 71, And a support end portion 81 b supported by the cam spring 83 and a spring support portion 81 c that supports the cam spring 83.

  The connecting end portion 81a is inserted into a through hole 71e having a notch in the connecting portion 71d of the detent plate 71, and is rotatably connected to the connecting portion 71d.

  The spring support portion 81 c is formed so as to protrude perpendicular to the axial direction of the parking rod 81 between the connection end portion 81 a and the support end portion 81 b and supports the end portion of the cam spring 83.

  The parking cam 82 has an inclined engagement surface that engages with the parking pole 84 and is formed in a truncated cone shape. The parking cam 82 has a through-hole penetrating in the axial direction, and a parking rod 81 is inserted into the through-hole, and is attached to the parking rod 81 so as to be movable in the axial direction.

  The cam spring 83 is formed of a compression coil spring, is attached to the parking rod 81, one end is supported by the spring support portion 81c of the parking rod 81, and the other end presses the parking cam 82 toward the support end portion 81b of the parking rod 81. is doing.

  The parking pole 84 has a cam engaging portion 84 a that engages with the parking cam 82, a support portion 84 b that is rotatably supported by the rotating shaft 87, and a meshing portion 84 c that meshes with the parking gear 85. . When the detent plate 71 rotates and the parking rod 81 moves to the support end 81b side, the parking pole 84 is pressed by the parking cam 82 and rotates around the support 84b. As shown in FIG. 6, the meshing portion 84 c meshes with the parking gear 85.

  The parking pole 84 is rotated around the support portion 84b when the detent plate 71 is rotated and the parking rod 81 is moved toward the connecting end portion 81a so that the parking cam 82 is not pressed. As shown in FIGS. 7 and 8, the meshing between the meshing portion 84c and the parking gear 85 is released.

The parking gear 85 is provided so as not to rotate relative to the counter shaft 54 of the gear mechanism 16 and is configured to rotate together with the counter shaft 54.
The parking gear 85 has a plurality of concave portions 85a formed at equal intervals on the circumference so as to mesh with the meshing portion 84c of the parking pole 84, and a plurality of convex portions 85b formed between the concave portions 85a. Yes.

  The rod cover 86 has a cylindrical portion 86a that slidably accommodates the parking rod 81, and is attached to the transaxle case 22 by an attachment portion (not shown).

  As shown in FIG. 9, the rotating shaft 87 is mounted on the transaxle case 22 via a support plate 88 so as to rotatably support the parking pole 84 and support the pole spring 89.

  The pole spring 89 is supported by the rotation shaft 87 and urges the parking pole 84 so as to rotate the parking pole 84 in a direction in which the meshing portion 84c and the parking gear 85 are disengaged.

  The transaxle housing 21 is molded by casting such as aluminum die casting, and has a plurality of ribs (not shown) and has high rigidity. As shown in FIGS. 1 and 2, the transaxle housing 21 is fixed to the engine 2 at one end by a fixing bolt (not shown) and accommodates the flywheel 2 b and the transaxle damper 11 inside.

  Similar to the transaxle housing 21, the transaxle case 22 is molded by casting such as aluminum die casting, and has a plurality of ribs (not shown) and has high rigidity.

  As shown in FIGS. 3, 6, and 7, the transaxle case 22 includes a lubricating oil storage tank 91, and the lubricating oil storage tank 91 is similar to the transaxle housing 21 in the transaxle housing 21. Is formed. Therefore, the lubricating oil storage tank 91 is defined by both the transaxle housing 21 and the transaxle case 22, and the lubricating oil is stored. Transaxle case 22 has mounting bosses 92 shown in FIGS. 6 and 7 formed to project from inner wall 22a in the axial direction of MG1 rotor shaft 26 of motor generator MG1 shown in FIG. .

  Further, the transaxle case 22 is formed with a case attaching portion 93 having a plurality of screw holes below the lubricating oil storage tank 91. A planetary gear mechanism accommodation case 24 that accommodates the planetary gear mechanism 13 is attached to the case attachment portion 93.

The lubricating oil storage tank 91 is defined by both the transaxle housing 21 and the transaxle case 22 as described above. In the transaxle housing 21, the lubricating oil storage tank 91 has a predetermined height from the inner wall 21 a in the axial direction of the portion located above the inner wall 21 a and the MG1 rotor shaft 26 of the motor generator MG1 shown in FIG. 1. It is defined by a tank wall 21b which protrudes and is formed in a band shape. The transaxle case 22 is formed in a band shape protruding from the inner wall 22a at a predetermined height in the axial direction of the portion located above the inner wall 22a and the MG1 rotor shaft 26 of the motor generator MG1 shown in FIG. The tank wall 22b is defined.
Therefore, the lubricating oil storage tank 91 is constituted by a space defined by the tank wall 21b, the tank wall 22b, the side wall 21c of the transaxle housing 21, and the side wall 22c of the transaxle case 22.

  The lubricating oil storage tank 91 is located above the inlet 91a through which the lubricating oil scraped up by the rotation of the differential ring gear 58 and the mounting boss 92 and is stored in the lubricating oil storage tank 91. Lubricating oil dropping hole 91 b for dropping lubricating oil toward mounting boss 92 is provided.

  As shown in FIGS. 6 and 7, the mounting boss 92 has a screw hole 92a formed at the tip thereof, and a mounting bolt 75 is inserted into the screw hole 92a so that the detent spring 72 and the spring retainer of the parking lock mechanism 17 are inserted. 73 is attached to the mounting boss 92.

  Similarly to the transaxle case 22, the transaxle rear cover 23 is molded by casting such as aluminum die casting, and has a plurality of ribs (not shown) and has high rigidity.

  As shown in FIGS. 3, 4, 6, and 7, the transaxle housing 21 is formed with a recess, and a parking lock sleeve 94 is provided in the recess. A support end portion 81 b of the rod 81 is slidably supported by the parking lock sleeve 94.

  Further, as shown in FIGS. 3, 4, 8, and 9, the transaxle housing 21 is provided with a mounting portion 95 that protrudes from the inner wall 21 a at a predetermined height. Is formed with a screw hole 95a. A mounting bolt 64a is inserted into the screw hole 95a, and the rotation shaft 87 and the support plate 88 of the parking lock mechanism 17 are attached to the mounting portion 95.

  The planetary gear mechanism housing case 24 is molded by casting, such as aluminum die casting, in the same manner as the transaxle case 22, and as shown in FIGS. 1 and 2, a cylindrical main body 24a and a ball bearing 34a are provided. It has a bearing support portion 24b to support, and a flange portion 24c formed to project in an annular shape in the radial direction at one end of the main body portion 24a.

The planetary gear mechanism 13 is accommodated in the planetary gear mechanism accommodation case 24.
The main body 24 a has a notch 24 d as an opening formed on the front side of the vehicle 1 so as to face the mounting boss 92 of the transaxle case 22.

  From this notch 24d, the lubricating oil dropped from the lubricating oil dripping hole 91b of the lubricating oil storage tank 91 of the transaxle case 22 and splashed upon hitting the mounting boss 92 enters the inside of the main body 24a.

  A plurality of screw holes are formed in the flange portion 24c, and mounting bolts 25 are inserted into the screw holes, so that the planetary gear mechanism housing case 24 is attached to the case attaching portion 93 of the transaxle case 22. ing.

  With the configuration in which the planetary gear mechanism 13 is accommodated in the planetary gear mechanism accommodation case 24, the planetary gear mechanism 13 can be easily incorporated into the transaxle case 22.

Next, the operation of the driving device 10 will be briefly described.
As shown in FIG. 12, when the drive device 10 is in a stopped state, the internal lubricating oil flows along the inner walls of the transaxle housing 21, the transaxle case 22, and the transaxle rear cover 23 to the lower part, and the planetary gear mechanism. 13, the gear mechanism 16 and the ball bearings 31a and 31b and the lubricating elements such as the tapered roller bearings 33a and 33b are dropped to the lower part, and gathered and stored in the lower part as indicated by an arrow a.

In this state, when the engine 2 is not started, that is, in a so-called EV running state, there is no inflow of lubricating oil into the planetary gear mechanism 13 by an oil pump (not shown) driven by the rotation of the engine 2.
However, due to the rotation of the differential ring gear 58, the lubricating oil that is scraped up flows into the planetary gear mechanism 13, and the lubricating elements inside the planetary gear mechanism 13 are lubricated.

Therefore, each lubricating element inside the planetary gear mechanism 13 is suitably lubricated even when the engine 2 is stopped with a small amount of lubricating oil supplied into the planetary gear mechanism 13.
Further, when the vehicle 1 is stopped, the parking lock mechanism 17 operates the electric actuator 61 by the ECU when the parking switch is turned on, for example, according to the operation of the parking switch by the operator. As shown, the switching mechanism 63 is in the parking position, the parking pole 84 of the locking mechanism 64 is engaged with the parking gear 85, and the counter shaft 54 is locked.

  In this state, when the parking switch is released and turned off, the electric actuator 61 is operated by the ECU, the switching mechanism 63 is switched to the non-parking position, the parking pole 84 of the locking mechanism 64 is separated from the parking gear 85, and the meshing is performed. The counter shaft 54 is unlocked and unlocked.

  When the vehicle 1 is in a running state, the rotational speed (rpm) of the engine 2 is increased and the rotational speed of the differential ring gear 58 of the drive device 10 is increased. Therefore, as shown in FIG. 13 and FIG. The amount of the lubricating oil that is scraped up increases, and the lubricating oil that flows into the lubricating oil storage tank 91 from the inlet 91a also increases. The lubricating oil flowing into the lubricating oil storage tank 91 is dripped vigorously from the lubricating oil dripping hole 91b.

  The amount of the dropped lubricating oil hits the mounting boss 92 increases, and the amount of lubricating oil that enters the notch 24d of the planetary gear mechanism housing case 24 also increases. Therefore, in the traveling state of the vehicle 1 in which the rotational speed of the engine 2 is increased, sufficient lubricating oil is supplied to the inside of the planetary gear mechanism 13 and each lubricating element is lubricated. As a result, sufficient lubricating oil is supplied to the inside of the planetary gear mechanism 13 and the lubricating elements constituting the driving device 10 from when the engine 2 is stopped to when the engine 2 is rotating at high speed.

  Since the drive device 10 according to the first embodiment is configured as described above, the following effects can be obtained.

  That is, the driving device 10 includes a motor generator MG1 having an MG1 rotor shaft 26, a motor generator MG2 having an MG2 rotor shaft 27, a planetary gear mechanism 13 coupled to the MG1 rotor shaft 26, a motor generator MG2, and a motor generator MG1. Alternatively, a differential 15 that outputs power output from the engine 2, a gear mechanism 16 that transmits power between the planetary gear mechanism 13 and the differential 15, and a locked state that prevents transmission of power from the gear mechanism 16 and power A parking lock mechanism 17 that can be in an unlocked state that allows transmission, a transaxle housing 21, a transaxle case 22, and a transaxle rear cover 23 are provided.

  The drive device 10 is configured such that each lubricating element is lubricated by the lubricating oil scraped up by the differential ring gear 58. The transaxle case 22 includes a planetary gear mechanism housing case 24 that houses the planetary gear mechanism 13, and a parking lot. A notch formed so that the planetary gear mechanism housing case 24 faces the mounting boss 92. The mounting boss 92 is formed so as to protrude in the axial direction of the MG1 rotor shaft 26 so as to mount the switching mechanism 63 of the lock mechanism 17. It is characterized by having 24d.

  The transaxle case 22 has a lubricating oil storage tank 91 that stores the lubricating oil scraped up by the differential ring gear 58, and the lubricating oil storage tank 91 is disposed above the mounting boss 92 so as to drop the lubricating oil onto the mounting boss 92. The lubricating oil dripping hole 91b is formed in.

  The planetary gear mechanism 13 is connected to the MG1 rotor shaft 26 and rotates together with the motor generator MG1, a pinion gear 44 that meshes with the sun gear 42, a carrier 43 that rotatably supports the pinion gear 44, and internal teeth that mesh with the pinion gear 44. And a ring gear 41 having the same.

  The gear mechanism 16 includes a hollow shaft 51 that supports a counter drive gear 52 coupled to the ring gear 41 of the planetary gear mechanism 13, a counter shaft 54 that supports a counter driven gear 53 that meshes with the counter drive gear 52, and a counter shaft 54. The drive pinion 55 meshed with the differential ring gear 58 of the differential 15, the reduction gear 56 meshed with the counter driven gear 53, and the reduction shaft 57 connected to the MG2 rotor shaft 27 of the motor generator MG 2 and supporting the reduction gear 56. is doing.

  The parking lock mechanism 17 includes a parking gear 85 provided on the counter shaft 54 and a parking pawl 84 that can be engaged with the parking gear 85 and can be engaged with the parking gear 85 in a disengaged state. Have.

  As a result, in the drive device 10 according to the first embodiment, the planetary gear mechanism 13 and the parking lock housed in the transaxle housing 21, the transaxle case 22, and the transaxle rear cover 23 have a simpler structure than before. The mechanism 17 can be sufficiently lubricated, and an effect that the mechanism 17 can be made smaller than before can be obtained.

  Specifically, the transaxle housing 21 and the transaxle case 22 have a lubricating oil storage tank 91 that stores the lubricating oil scraped up by the differential ring gear 58, and the lubricating oil storage tank 91 lubricates the mounting boss 92. Since it has the lubricating oil dripping hole 91b formed above the mounting boss 92 so as to drip the oil, the necessity of forming a lubricating oil guide portion as a lubricating oil supply path in the conventional driving device is eliminated. An effect is obtained. The structure of the lubricating oil supply path does not complicate the structure, and the driving apparatus 10 according to the first embodiment has a simpler structure than the conventional structure, and sufficiently lubricates the internal lubricating elements. Can be supplied.

  Further, even in an EV traveling state in which the lubricating oil does not flow into the planetary gear mechanism 13 by the oil pump driven by the rotation of the engine 2, the lubricating oil scraped up by the differential ring gear 58 is stored in the lubricating oil storage tank 91. . The lubricating oil stored in the lubricating oil storage tank 91 is dropped through the lubricating oil dropping hole 91b. The dropped lubricating oil hits the mounting boss 92 and scatters, quickly enters the inside of the notch 24d of the planetary gear mechanism housing case 24, and each lubricating element inside the planetary gear mechanism 13 is lubricated. .

  Therefore, even when the engine 2 is stopped when the amount of lubricant supplied to the planetary gear mechanism 13 is small, the lubricating elements inside the planetary gear mechanism 13 and the lubricating elements of the parking lock mechanism 17 are suitably lubricated. The effect is obtained.

  When the rotational speed (rpm) of the engine 2 increases, the amount of lubricating oil scraped up by the rotation of the differential ring gear 58 increases, and the lubricating oil flowing into the lubricating oil storage tank 91 from the inlet 91a also increases. The lubricating oil flowing into the lubricating oil storage tank 91 is dripped vigorously from the lubricating oil dripping hole 91b. The amount of the dropped lubricating oil hits the mounting boss 92 increases, and the amount of lubricating oil that enters the notch 24d of the planetary gear mechanism housing case 24 also increases.

  Therefore, even in the traveling state of the vehicle 1 in which the rotational speed of the engine 2 is increased, sufficient lubricating oil is supplied into the planetary gear mechanism 13 and each lubricating element is lubricated. As a result, there is an effect that sufficient lubricating oil is supplied to the inside of the planetary gear mechanism 13 and the lubricating elements constituting the driving device 10 from when the engine 2 is stopped to when the engine 2 is rotating at high speed.

  Further, since the notch 24d of the planetary gear mechanism housing case 24 is formed on the front side of the vehicle 1, it flows into the planetary gear mechanism housing case 24 from the notch 24d and the ring gear 41 of the planetary gear mechanism 13 rotates. Thus, the lubricating oil scraped up by the above is not scattered to the outside from the notch 24d, and the effect that the optimum amount of the lubricating oil can be secured is obtained.

  Further, the drive device 10 according to the first embodiment reduces the space for installing the parking lock mechanism 17 in the left-right direction of the drive device 10 shown in FIG. The transaxle case 22 can be reduced in size and the cost can be reduced.

  That is, as shown in FIG. 3, in the transaxle case 22, the mounting boss 92 for attaching the detent spring 72 constituting the switching mechanism 63 of the parking lock mechanism 17 and the planetary gear mechanism housing case 24 for housing the planetary gear mechanism 13 are provided. Since the case attaching portion 93 to be attached is adjacent to the vehicle 1 in the front-rear direction, the notch 24d is provided in the planetary gear mechanism accommodation case 24 where the planetary gear mechanism accommodation case 24 and the attachment boss 92 overlap each other. The space for installing the parking lock mechanism 17 in the front-rear direction can be reduced.

  In this configuration, the parking gear 85 of the parking lock mechanism 17 is provided on the counter shaft 54 of the gear mechanism 16, so that space saving can be realized. It can be installed compactly.

  In the drive device 10 according to the first embodiment, the transaxle case 22 has a lubricating oil storage tank 91 having a lubricating oil dripping hole 91b, and a mounting boss 92 for attaching a parking lock mechanism formed therebelow. ing.

  The planetary gear mechanism housing case 24 has a notch 24 d formed on the front side of the vehicle 1 so as to face the mounting boss 92 of the transaxle case 22, and the transaxle housing 21 and the transaxle case 22 When the lubricating oil dropped from the lubricating oil dripping hole 91b of the lubricating oil storage tank 91 and scattered by hitting the mounting boss 92 enters the inside of the main body 24a from the notch 24d, that is, the lubricating oil of the lubricating oil storage tank 91. The case where the drip hole 91b and the mounting boss 92 are provided relatively close to each other has been described.

  However, the drive device according to the present invention may be configured with a structure other than the structure in which the lubricating oil dropping hole and the mounting boss of the lubricating oil storage tank in the transaxle case are relatively close to each other.

  For example, a mounting boss is formed at a lower position away from the lubricating oil dripping hole of the lubricating oil storage tank in the transaxle case, and the lubricating oil dripping hole and the mounting boss are relatively separated from each other. The cutout of the planetary gear mechanism housing case may be formed so as to do so.

  In addition, a mounting boss is formed at a position adjacent to the lubricating oil dropping hole of the lubricating oil storage tank in the transaxle case, and the lubricating oil discharged from the lubricating oil dropping hole is transferred downward through the mounting boss, You may make it comprise with the structure which provided the notch in the planetary gear mechanism accommodation case so that the lubricating oil dripped from this attachment boss | hub may enter inside.

  In these cases, the lubricating oil scraped up by the gear mechanism is dropped or discharged from the lubricating oil dripping hole of the lubricating oil storage tank, and is scattered by the mounting boss provided below the lubricating oil storage tank. It can flow into the inside of the mechanism housing case through the notch.

Moreover, you may make it comprise with the transaxle case without a lubricating oil storage tank, without forming the lubricating oil storage tank in a transaxle case.
In this case, the mounting boss is formed at a position facing the planetary gear mechanism housing case, and a notch is provided in the planetary gear mechanism housing case so as to face the mounting boss.
Then, the lubricating oil scooped up by the gear mechanism travels along the inner wall above the transaxle case and circulates vigorously above the planetary gear mechanism housing case. As a result, the raised lubricating oil collides with the mounting boss and scatters, and can preferably flow through the notch of the planetary gear mechanism housing case into the interior thereof.

(Second Embodiment)
FIG. 15 and FIG. 16 are views showing a second embodiment of the drive device according to the present invention, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 15, the drive device 20 according to the second embodiment is the same as the drive device 10 according to the first embodiment, and the lubricating oil dropping hole 91 f of the lubricating oil storage tank 91 of the transaxle housing 21 and the transaxle case 22. The other components are the same as those of the driving apparatus 10 according to the first embodiment. Hereinafter, a different part from the drive device 10 according to the first embodiment, that is, the lubricating oil dropping hole 91f of the lubricating oil storage tank 91 will be described.

  The lubricating oil storage tank 91 of the transaxle case 22 is formed with a lubricating oil dropping hole 91 f for dropping the lubricating oil stored in the lubricating oil storage tank 91 toward the mounting boss 92.

The lubricating oil dropping hole 91f is formed by a notch having a depth D having a predetermined width from the distal end portion 91g of the tank wall 22b toward the proximal end portion 91h of the tank wall 22b. Further, the front end portion 91g of the tank wall 22b is substantially at the same position as the mating surface portion 20a of the transaxle housing 21 and the transaxle case 22.
That is, the tank wall 22b is provided in the transaxle case 22 so that one end of the lubricating oil dripping hole 91f is substantially at the same position as the mating surface portion 20a.

With this configuration, as shown in FIG. 16, when the vehicle 1 is in a running state, the lubricating oil is scraped up by the rotation of the differential ring gear 58 of the drive device 20 and flows into the lubricating oil storage tank 91 from the inflow port 91a. The lubricating oil that has flowed into the lubricating oil storage tank 91 is dripped vigorously from the lubricating oil dripping hole 91f.
The dropped lubricating oil hits the mounting boss 92 and scatters, enters the inside through the notch 24d of the planetary gear mechanism housing case 24, and sufficient lubricating oil is supplied to the inside of the planetary gear mechanism 13, whereby each lubricating element is lubricated. Is done.

  Since the drive device 20 according to the second embodiment is configured as described above, the same effects as those of the drive device 10 according to the first embodiment can be obtained.

  The drive device 20 according to the second embodiment is also housed inside the transaxle housing 21, the transaxle case 22, and the transaxle rear cover 23 with a simpler structure than the conventional drive device 10 as with the drive device 10 according to the first embodiment. The planetary gear mechanism 13 and the parking lock mechanism 17 that have been made can be sufficiently lubricated, and an effect that the size can be reduced as compared with the conventional one can be obtained.

  Specifically, the transaxle housing 21 and the transaxle case 22 have a lubricating oil storage tank 91 that stores the lubricating oil scraped up by the differential ring gear 58, and the lubricating oil storage tank 91 lubricates the mounting boss 92. Since the lubricating oil dropping hole 91f is formed above the mounting boss 92 so as to drop the oil, the lubricating oil dropped from the lubricating oil dropping hole 91f is scattered by the mounting boss 92, and the planetary gear mechanism housing case. It flows into the inside through 24 notches 24d, and the internal lubricating element is sufficiently lubricated.

  Further, since the lubricating oil dropping hole 91f is formed at substantially the same position as the mating surface portion 20a of the transaxle housing 21 and the transaxle case 22, than the lubricating oil dropping hole 91b in the drive device 10 according to the first embodiment, The effect that the lubricating oil can flow into the planetary gear mechanism housing case 24 more reliably is obtained.

  Further, when the lubricating oil dropping hole 91f is formed at substantially the same position as the mating surface portion 20a, the lubricating oil dropped from the lubricating oil dropping hole 91f is more surely applied to the parking lock mechanism 17 attached to the mounting boss 92. The parking lock mechanism 17 is more reliably lubricated.

  With the configuration in which the lubricating oil dropping hole 91f and the mounting boss 92 of the lubricating oil storage tank 91 are provided, it is possible to eliminate the necessity of forming a lubricating oil guide portion as a lubricating oil supply path in a conventional driving device. The structure of the lubricating oil supply path is not complicated, and the driving apparatus 20 according to the second embodiment has a simpler structure than the conventional one, and sufficiently lubricates the internal lubricating elements. Can be supplied.

  Also in the drive device 20 according to the second embodiment, as in the drive device 10 according to the first embodiment, there is a space for installing the parking lock mechanism 17 in the left-right direction of the drive device 20, that is, in the front-rear direction of the vehicle 1. Therefore, the transaxle case 22 can be reduced in size and the cost can be reduced.

  That is, like the drive device 10 according to the first embodiment, in the transaxle case 22, the mounting boss 92 to which the detent spring 72 that constitutes the switching mechanism 63 of the parking lock mechanism 17 is attached, and the planetary gear that houses the planetary gear mechanism 13. A case mounting portion 93 for mounting the mechanism housing case 24 is adjacent to the vehicle 1 in the front-rear direction, and a notch 24d is provided in the planetary gear mechanism housing case 24 where the planetary gear mechanism housing case 24 and the mounting boss 92 overlap. Therefore, the space for installing the parking lock mechanism 17 in the front-rear direction of the vehicle 1 can be reduced.

  In this configuration, the parking gear 85 of the parking lock mechanism 17 is provided on the counter shaft 54 of the gear mechanism 16, so that space saving can be realized. It can be installed compactly.

(Third embodiment)
17 to 20 are views showing a third embodiment of the driving apparatus according to the present invention. The same reference numerals are given to the same components as those in the first embodiment and the second embodiment, and the description will be omitted.

  As shown in FIGS. 17 and 18, the drive device 30 according to the third embodiment is the same as the drive oil 20 according to the second embodiment, and the lubricating oil in the lubricating oil storage tank 91 of the transaxle housing 21 and the transaxle case 22. Only the configuration having the lubricating oil guiding rib 22e is different between the dropping hole 91f and the mounting boss 92, and the other components are configured in the same manner as the driving device 20 according to the second embodiment. Hereinafter, a different part from the drive device 20 according to the second embodiment, that is, the lubricating oil guide rib 22e of the transaxle case 22 will be described.

  The lubricating oil storage tank 91 of the transaxle housing 21 and the transaxle case 22 is formed with a lubricating oil dropping hole 91 b for dropping the lubricating oil stored in the lubricating oil storage tank 91 toward the mounting boss 92.

  The lubricating oil guide rib 22e is disposed between the lubricating oil dropping hole 91f and the mounting boss 92 from the inner wall 22a of the transaxle case 22 to the tank of the transaxle case 22 in the axial direction of the MG1 rotor shaft 26 of the motor generator MG1. It has the same thickness as the wall 22b and protrudes at a predetermined height.

Lubricant guiding rib 22e, as shown in FIG. 18, the base end portion 92c of the mounting boss 92 is formed with a height _{h 1,} the distal end portion 92d of the mounting boss 92 is formed with a height _{h 2} . The height h ₁ and the height h ₂ may be formed such that the height h ₁ is higher than the height h ₂ , and the height h ₁ and the height h ₂ are formed at the same height. May be.

  With this configuration, as shown in FIGS. 19 and 20, when the vehicle 1 is in a running state, the lubricating oil is scraped up by the rotation of the differential ring gear 58 of the drive device 30, and enters the lubricating oil storage tank 91 from the inlet 91 a. The lubricating oil that flows in and flows into the lubricating oil storage tank 91 is dripped vigorously from the lubricating oil dripping hole 91f.

  At this time, the dropped lubricating oil is guided to the lubricating oil guide rib 22e, is transmitted through the mounting boss 92, enters the inside of the notch 24d of the planetary gear mechanism housing case 24, and simultaneously hits the mounting boss 92 and scatters. The planetary gear mechanism housing case 24 enters the inside of the notch 24d, and sufficient lubricating oil is supplied to the planetary gear mechanism 13 to lubricate each lubricating element.

  Since the drive device 30 according to the third embodiment is configured as described above, the same effects as those of the drive device 10 according to the first embodiment and the drive device 20 according to the second embodiment are obtained.

  Similarly to the drive device 20 according to the second embodiment, the drive device 30 according to the third embodiment is housed inside the transaxle housing 21, the transaxle case 22, and the transaxle rear cover 23 with a simpler structure than before. The planetary gear mechanism 13 and the parking lock mechanism 17 that have been made can be sufficiently lubricated, and an effect that the size can be reduced as compared with the conventional one can be obtained.

  Specifically, the transaxle housing 21 and the transaxle case 22 have a lubricating oil storage tank 91 that stores the lubricating oil scraped up by the differential ring gear 58, and the lubricating oil storage tank 91 lubricates the mounting boss 92. Since the lubricating oil dropping hole 91f is formed above the mounting boss 92 so as to drop the oil, the lubricating oil dropped from the lubricating oil dropping hole 91f is scattered by the mounting boss 92, and the planetary gear mechanism housing case. It flows into the inside through 24 notches 24d, and the internal lubricating element is sufficiently lubricated.

  Further, since the lubricating oil guiding rib 22e is provided between the lubricating oil dropping hole 91f and the mounting boss 92, the lubricating oil dropped from the lubricating oil dropping hole 91f is guided to the lubricating oil guiding rib 22e and attached. Since it enters the inside of the notch 24 d of the planetary gear mechanism housing case 24 through the boss 92, an effect that more lubricating oil can flow into the planetary gear mechanism housing case 24 more reliably can be obtained.

  Further, when the lubricating oil dropping hole 91f is formed at substantially the same position as the mating surface portion 20a, the lubricating oil dropped from the lubricating oil dropping hole 91f is more surely applied to the parking lock mechanism 17 attached to the mounting boss 92. The parking lock mechanism 17 is more reliably lubricated.

  With the configuration in which the lubricating oil dropping hole 91f and the mounting boss 92 of the lubricating oil storage tank 91 are provided, it is possible to eliminate the necessity of forming a lubricating oil guide portion as a lubricating oil supply path in a conventional driving device. The structure of the lubricating oil supply path is not complicated, and the driving apparatus 30 according to the third embodiment has a simpler structure than that of the prior art, and sufficiently lubricates the internal lubricating elements. Can be supplied.

  Also in the drive device 30 according to the third embodiment, as in the drive device 10 according to the first embodiment, there is a space for installing the parking lock mechanism 17 in the left-right direction of the drive device 20, that is, the front-rear direction of the vehicle 1. Therefore, the transaxle case 22 can be reduced in size and the cost can be reduced.

  That is, like the drive device 10 according to the first embodiment, in the transaxle case 22, the mounting boss 92 to which the detent spring 72 that constitutes the switching mechanism 63 of the parking lock mechanism 17 is attached, and the planetary gear that houses the planetary gear mechanism 13. A case mounting portion 93 for mounting the mechanism housing case 24 is adjacent to the vehicle 1 in the front-rear direction, and a notch 24d is provided in the planetary gear mechanism housing case 24 where the planetary gear mechanism housing case 24 and the mounting boss 92 overlap. Therefore, the space for installing the parking lock mechanism 17 in the front-rear direction of the vehicle 1 can be reduced.

  Also in this configuration, since the parking gear 85 of the parking lock mechanism 17 is provided on the counter shaft 54 of the gear mechanism 16, space saving can be realized. It can be installed compactly.

  As described above, the drive device according to the present invention has a simpler structure than the conventional one, can sufficiently lubricate the planetary gear device and the parking lock mechanism housed in the case, and is smaller than the conventional one. This is advantageous in that it can provide a drive device that can be used, and is useful for drive devices for vehicles such as automobiles in general.

1 vehicle 2 engine (internal combustion engine)
2a Crankshaft (drive shaft)
10, 20, 30 Driving device 11 Transaxle damper 12 Input shaft (connection shaft)
13 planetary gear mechanism 15 differential (output shaft)
16 Gear mechanism 17 Parking lock mechanism 21 Transaxle housing (case)
22 Transaxle case (case)
23 Transaxle rear cover (case)
24 Planetary gear mechanism housing case 24d Notch (opening)
26 MG1 rotor shaft (rotating shaft)
27 MG2 rotor shaft (rotating shaft)
51 Hollow shaft (first rotating shaft)
52 Counter drive gear (first gear)
53 Counter driven gear (2nd gear)
54 Countershaft (second rotary shaft)
55 Drive pinion (3rd gear)
56 Reduction gear (4th gear)
57 Reduction shaft (3rd rotating shaft)
58 Differential ring gear 84 Parking pole 85 Parking gear 91 Lubricating oil storage tank 91a Inlet 91b, 91f Lubricating oil dropping hole 92 Mounting boss MG1 Motor generator (first rotating electric machine, rotating electric machine)
MG2 motor generator (second rotating electrical machine, rotating electrical machine)

Claims (4)

A rotating electrical machine having a rotating shaft; a planetary gear mechanism coupled to the rotating shaft; an output shaft for outputting power output from the rotating electrical machine; and the power between the planetary gear mechanism and the output shaft. A transmission gear mechanism, a parking lock mechanism capable of taking a locked state that prevents transmission of the power of the gear mechanism, and an unlocked state that allows transmission of the power, the rotating electrical machine, the output shaft, and the planetary gear A drive unit in which a lubricating element is lubricated by the lubricating oil scooped up by the gear mechanism, and a case housing the parking mechanism.
The case includes a planetary gear mechanism housing case for housing the planetary gear mechanism, and an attachment boss formed to project in the axial direction of the rotary shaft so as to attach the parking lock mechanism;
The drive device characterized in that the planetary gear mechanism housing case has an opening formed so as to face the mounting boss.   The case has a lubricating oil storage tank that stores the lubricating oil scraped up by the gear mechanism, and the lubricating oil storage tank is formed above the mounting boss so as to drop the lubricating oil onto the mounting boss. The drive device according to claim 1, further comprising a lubricating oil dropping hole.   The planetary gear mechanism includes a sun gear connected to the rotating shaft and rotating together with the rotating electrical machine, a pinion gear that meshes with the sun gear, a carrier that rotatably supports the pinion gear, and a ring gear that has internal teeth that mesh with the pinion gear. The gear mechanism includes: a first rotating shaft that supports a first gear coupled to the ring gear of the planetary gear mechanism; a second rotating shaft that supports a second gear that meshes with the first gear; A third gear that is supported by a second rotating shaft and meshes with a ring gear of a differential that constitutes the output shaft, and the parking lock mechanism includes a parking gear provided on the second rotating shaft and the parking gear. A parking pawl capable of engaging and engaging with the parking gear; Drive device according to claim 1 or claim 2 that.   The first rotating shaft is constituted by a hollow rotating shaft, and the carrier of the planetary gear mechanism is connected to a drive shaft of an internal combustion engine and is connected to the inside of the first rotating shaft so as to be freely rotatable. The gear mechanism has a third rotating shaft that supports a fourth gear that meshes with the second gear, and the rotating electrical machine is connected to the rotating shaft. The drive device according to claim 3, further comprising a first rotating electrical machine and a second rotating electrical machine connected to the third rotating shaft and outputting power.

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