JP2016200210A - Range change-over device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range change-over device capable of executing inputting of P-range and making a compact size of the device even if a range change-over by an electric motor is difficult.SOLUTION: A range change-over device is constituted by a first lever 33 having an output shaft 20 for transmitting a rotation of a motor 14 to a shift shaft for changing-over a shift range, a second lever 34 having the same rotation central axis as a rotating axis of the output shaft 20 and rotatably fitted to the first lever 33, a resilient member arranged to act for applying force in such a direction as one in which the first lever 33 and the second lever 34 are repelled to each other, and a shaft 38 of which extremity end is inserted into a through-hole 37 arranged at the second lever 34 and a hole 36 arranged at the output shaft 20 in an insertable or removal manner so as to prevent a relative rotation between the first lever 33 and the second lever 34.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a range switching device in a shift-by-wire system that operates a shift range of an automatic transmission of a vehicle via an electrical signal.

  In recent years, in vehicle control, a shift-by-wire system that switches the shift range of an automatic transmission of a vehicle with an electric signal in accordance with a command from a vehicle operator has been adopted. A vehicle is required to be able to stop reliably and to be towable even when an abnormality occurs due to some factor. In the case of a conventional vehicle that does not use a shift-by-wire system, the vehicle can be stopped by switching the shift range of the automatic transmission to the P range or using a parking brake. In addition, the vehicle can be easily pulled by switching the shift range of the automatic transmission from the P range to another range.

  On the other hand, in a vehicle to which the shift-by-wire system is applied, the shift range of the automatic transmission is electrically switched. Therefore, for example, if an abnormality occurs in the power supply or power supply system, such as battery running out or disconnection, automatic Changing the shift range of the transmission becomes difficult. For this reason, even in vehicles equipped with a shift-by-wire system, there is a need for a range switching device that can switch the shift range of an automatic transmission when an abnormality occurs in the vehicle for some reason.

  For example, as a method of switching the shift range of an automatic transmission when an abnormality occurs in the power supply system, the shift-by-wire device (SBW device) of Patent Document 1 includes a capacitor that stores power supplied to the range control means. Therefore, even when an abnormality occurs in the battery or the power supply system, the actuator of the SBW device can switch the automatic transmission to the “P range” at least once by the electric power stored in the capacitor. As a result, the vehicle is stopped safely and reliably. Further, the shift range of the automatic transmission is manually released from the “P range” by operating the lever. Thereby, the parked vehicle can be easily moved, for example, by towing.

JP 2008-180250 A

  The conventional SBW device is a measure that assumes that the shift range is switched to the P range by the actuator using the power stored in the capacitor when power is not supplied due to an abnormality in the power supply system. There is a problem that the actuator does not operate normally and the shift range cannot be switched.

  The present invention has been made to solve the above-described problems, and can perform P-range insertion even when it is difficult to perform normal operation by an electric motor in a state of voltage drop or the like. An object of the present invention is to provide a range switching device that enables range switching in a short time and does not increase the size of the device.

  In order to solve the above problems, a range switching device according to the present invention includes a first lever having an output shaft that transmits rotation of a motor to a shift shaft that switches a shift range, and the same rotation shaft as the output shaft. A force acts in a direction in which the second lever, which has a rotation center axis and is rotatably fitted to the first lever, and the first lever and the second lever are separated from each other. The elastic member and the tip end portion are inserted in a through hole provided in the second lever and a hole provided in the output shaft so as to be detachable, and the first lever and the And a shaft for preventing mutual rotation between the second levers.

  According to the range switching device of the present invention, even when the normal range switching operation by the electric motor cannot be performed due to a supply voltage drop or the like, the first lever and the second lever are separated in a direction away from each other by the elastic member. By rotating, the shift range can be forcibly switched to the P range, and when the supply voltage is restored, the shift range can be switched back to the normal shift state by the motor. is there.

It is a perspective view which shows the whole structure of the shift range switching system provided with the range switching apparatus which concerns on Embodiment 1. FIG. It is a top view which shows the external appearance of the range switching apparatus which concerns on Embodiment 1. FIG. It is sectional drawing seen from the cut surface along the AA line of FIG. It is sectional drawing seen from the cut surface along the BB line of FIG. It is principal part sectional drawing seen from the cut surface along the CC line of FIG. It is principal part sectional drawing seen from the cut surface along the AA line of FIG. 2 at the time of emergency operation. It is principal part sectional drawing seen from the cut surface along CC line of FIG. 3 at the time of emergency operation. It is sectional drawing equivalent to FIG. 3 of the range switching apparatus which concerns on Embodiment 2. FIG. It is principal part sectional drawing seen from the cut surface along the DD line of FIG. It is sectional drawing equivalent to FIG. 3 of the range switching apparatus which concerns on Embodiment 3. FIG. FIG. 6 is a cross-sectional view corresponding to FIG. 3 of a range switching device according to a fourth embodiment.

  Hereinafter, the details of the range switching device according to the embodiment of the present invention will be described with reference to FIGS.

Embodiment 1 FIG.
FIG. 1 is a perspective view illustrating an overall configuration of a shift range switching system including a range switching device according to Embodiment 1, and FIG. 2 is a plan view illustrating an appearance of the range switching device.

  First, the overall configuration of the shift range switching system including the range switching device according to the first embodiment will be described with reference to FIG. The shift range switching system 1 includes a range switching device 2, a detent mechanism 3, a parking mechanism 4 and a valve body 5.

  Here, the range switching device 2 is configured to be attached to, for example, an automatic transmission mounted on a vehicle, and a shift signal (electric signal) from a shift lever (range selection means) selected by a vehicle operator. ) Is supplied. Based on this shift signal, the range switching device 2 rotationally drives a shift shaft 6 to be driven connected to an output shaft 20 (described later), and a substantially fan-shaped detent attached to the shift shaft 6. The plate 7 is rotated forward and backward. The spool valve 8 is attached to the detent plate 7 so as to be interlocked. When the detent plate 7 is rotated by the rotation of the shift shaft 6, the interlocking spool valve 8 is reciprocated in the valve body 5, thereby The oil passage in the valve body 5 is switched and set to a predetermined shift range (P, R, N, D).

  Further, the detent plate 7 is provided with a plurality of recesses 7a at the substantially fan-shaped tip, and these recesses 7a correspond to the respective range positions (P, R, N, D) of the spool valve 8. Yes. Further, the detent spring 9 fixed to the valve body 5 acts as a leaf spring, and the detent plate 7 is positioned and held by pressing the tip of the detent spring 9 against the recess 7a.

  On the other hand, the parking mechanism 4 includes a parking rod 10 connected to the detent plate 7, a conical portion 11 provided at the tip of the parking rod 10, a parking pole 12, and a parking gear 13. The parking rod 10 moves up and down around a shaft 12a through a conical portion 11 provided at the tip of the parking rod 10 by changing the position of the parking rod 10 in accordance with the forward and reverse rotational movement of the detent plate 7. Seesaw exercise. Along with this movement, the convex portion 12b of the parking pole 12 is engaged with or disengaged from the concave portion 13a of the parking gear 13, thereby locking and unlocking the parking mechanism 4, and the parking gear 13 in the automatic transmission is achieved. This prevents or enables rotation of the central output shaft.

  As described above, in this shift range switching system 1, since the shift shaft 6 and the spool valve 8 are interlocked via the detent plate 7, the spool valve is controlled by controlling the rotation angle of the shift shaft 6. 8 position can be controlled and set to a predetermined shift range.

  Next, the configuration and operation of the range switching device 2 according to the present invention will be described in detail with reference to FIGS. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a cross-sectional view of the main part when viewed from a cut surface along the line CC in FIG.

  2 and 3, the range switching device 2 includes a sensor 15 for detecting the rotational position of the motor 14, a connector 2a provided on the rear body 16, and a circuit board 17 for connecting the motor 14 so that energization is possible, and an external control unit. Range switching for switching the shift range by rotating the motor 14 controlled based on the control signal from the motor, the speed reduction mechanism section 18 connected to the motor 14, and the shift shaft 6 connected to the speed reduction mechanism section 18. Part 19.

  As shown in FIG. 3, the output shaft 20 of the range switching unit 19 is rotatable via a sliding bearing 22 provided inside a support cylinder portion 21 a of the front body 21 constituting the housing of the range switching device 2. Is retained. Further, a concave portion 20a is provided on the outer peripheral portion on the front side of the output shaft 20, and is held airtight or liquid tight from the outside by a seal member 24 sandwiched between the concave portion 20a and the front body 21.

  As shown in FIG. 3 to FIG. 5, the speed reduction mechanism portion 18 is constituted by a planetary gear speed reduction mechanism and a spur gear speed reduction mechanism, and a sun gear 27 formed integrally with the motor shaft 26 of the motor 14 and the sun gear 27. A planetary gear 28 meshing with the gear 27, an annular gear 29 formed with internal teeth meshing with the planetary gear 28, a carrier 30 that supports the planetary gear 28 so as to rotate and revolve, and a carrier opposite to the planetary gear 28. A small gear 31 attached to 30 and a large gear 32 fixed to the output shaft 20 and meshing with the small gear 31 are provided. The carrier 30 formed integrally with the small gear 31 is held so as to be slidable on the outer periphery of the motor shaft 26 extending toward the planetary gear 28 via the sliding bearing 23.

  As shown in FIGS. 4 and 5, the emergency operation mechanism portion 48 includes a first lever 33, a second lever 34, an elastic member 35, and a shaft 38. The first lever 33 having the fan-shaped large gear 32 is fixed to the output shaft 20, and the second lever 34 is rotatably fitted to the first lever 33 with respect to the first lever 33. Has been. Further, the elastic member 35 is arranged so that the first lever 33 and the second lever 34 are applied with a force in a direction away from each other with respect to the rotation direction. Here, for example, by using a plate spring for the elastic member 35 and holding it in a compressed state, the emergency operation mechanism 48 can be configured more simply and at low cost.

  A hole 36 having a detent fitting part 20b (H cut shape) is provided at the center position of the end of the output shaft 20 on the side where the first lever 33 is fixed, and the second A through hole 37 having a detent fitting portion 34a having the same shape is provided at the center position of the lever 34. Further, the shaft 38 is formed at the distal end portion 38 a so as to wedge with the hole 36 and the through hole 37, and the shaft 38 is fitted to the hole 36 and the through hole 37 so as to be detachable. . The shaft 38 is attached in a state where the tip end portion 38a thereof is in contact with the bottom surface portion 20c of the hole 36 at the end portion of the output shaft 20, and further, the shaft 38 is pressed against the first lever 33 and the second lever 34 side. A coil spring 39 is provided between the shaft 38 and the rear body 16 so that a force acts on the shaft.

  Furthermore, the end 38 b side opposite to the tip 38 a side of the shaft 38 that contacts the output shaft 20 and the second lever 34 is connected to the outside of the range switching device 2 via a bearing 40 provided in the rear body 16. A protective cap 41 is attached for the purpose of preventing malfunction of the emergency operating mechanism 48 during normal operation. Further, between the shaft 38 and the bearing 40, the seal member 25 is attached to the recess 20a of the output shaft 20, and is kept airtight or liquid tight from the outside.

  The motor 14 is a brushless motor using a permanent magnet, and includes a rotor 43 that is rotatably supported and a stator 44 that is arranged coaxially with the rotation center of the rotor 43. The rotor 43 is press-fitted and fixed to the motor shaft 26, and the magnet 45 is fixed in the rotor 43 by means such as adhesion. The motor shaft 26 is rotatably held by the rear body 16 by a first rolling bearing 46 and a second rolling bearing 47. Further, the rear body 16 constitutes a housing of the range switching device 2 together with the front body 21, and the output shaft 20 of the range switching unit 19 and the shaft center of the motor shaft 26 are arranged apart from each other, and the small gear 31 and the large gear 32 are arranged. Is possible.

  The circuit board 17 is fixed to the rear body 16, and one surface thereof is disposed at a position facing the rotor 43 of the motor 14, and the magnetic sensor 15 is attached in the vicinity of the rotor 43 of the circuit board 17. The magnetic sensor 15 detects the rotational position of the rotor 43 based on a change in magnetic flux of the magnet 45 accompanying the rotation of the rotor 43.

  The stator 44 is composed of a stator core 46 and a coil 47. The stator core 46 forms a plurality of stator teeth that protrude in the radially inward direction. The coil 47 constitutes a three-phase connection composed of U-phase, V-phase, and W-phase coils wound around each stator tooth.

  In the range switching device of the present embodiment configured as described above, the torque generated by the motor 14 is decelerated by the sun gear 27, the planetary gear 28, the annular gear 29, and the carrier 30, and transmitted to the small gear 31. . The torque transmitted to the small gear 31 is decelerated by the large gear 32 that meshes with the small gear 31 and transmitted to the output shaft 20.

  Next, the operation of the emergency operation mechanism 48 will be described in detail with reference to FIGS. 6 is a cross-sectional view of the main part showing a cross section along line AA in FIG. 2 during an emergency operation, and FIG. 7 is a main part showing a cross section along the line CC in FIG. 3 during emergency operation. FIG.

  If it is determined that the shift range cannot be switched by the motor 14 due to a decrease in the supply voltage to the range switching device 2, etc., the power supply to the motor 14 is stopped, and an abnormality is detected with respect to the vehicle operator by a vehicle interior indicator or the like. To inform. At this time, if the shift range is in the D or R state, the vehicle stop state is not established only with the parking brake, and there is a danger, so it is necessary to forcibly shift to the P range. Therefore, the vehicle operator removes the protective cap 41 attached to the outer surface of the range switching device 2 and pulls the end portion 38b of the shaft 38 exposed from the rear body 16, whereby the rotation stop fitting portion of the shaft 38 is removed. The tip end 38a is disengaged from the anti-rotation fitting portion 20b of the first lever 33 and the anti-rotation fitting portion 34a of the second lever 34, and is compressed between the first lever 33 and the second lever 34. When the compression force of the elastic member 35 held in the state is released, the first lever 33 and the second lever 34 rotate in directions away from each other, and the stopper 34b of the second lever 34 has a stopper portion 34b. The first lever 33 is brought into contact with the stopper 21b provided in the front body 21 and the rotation angle thereof is restricted, and the first lever 33 is interposed via the output shaft 20 and the shift shaft 6. At the P-range stopper of the detent plate 7 in the lance mission, it stops its rotation angle is restricted.

  This makes it possible to forcibly shift to the P range by an operation of the vehicle operator in an emergency such as a supply voltage drop.

  If it is determined that range switching by the motor 14 can be performed after the supply voltage returns to the normal state, power is supplied to the motor 14 and the normal operation state is entered. When shifting to the D range, the first lever 33 fitted to the shift shaft 6 via the output shaft 20 is fitted to the first lever 33 while the elastic member 35 is compressed by the motor torque. When the shapes of the mating portion 20b and the anti-rotation fitting portion 34a of the second lever 34 coincide with each other, the biasing force of the coil lever that presses the first lever 33 and the second lever 34 provided on the shaft 38 is used. The shaft 38 is automatically inserted into the anti-rotation fitting portion 20b of the first lever 33 and the anti-rotation fitting portion 34a of the second lever 34, and is fitted into the normal operation state. It is possible to make attributed.

  As described above, according to the range switching device according to the first embodiment, the first lever and the second lever in the emergency operation state in which the supply voltage is lowered and it is difficult to switch the shift range by the motor. By rotating the lever in a direction away from the elastic member, the shift range can be forcibly switched to the P range, and when the supply voltage is restored, the shift range of the normal operation state by the motor is restored. There is an effect that it can return to switching.

Embodiment 2. FIG.
FIG. 8 is a cross-sectional view corresponding to FIG. 3 of the range switching apparatus according to the second embodiment, and FIG. 9 is a cross-sectional view of a main part when viewed from a cut surface along the line DD in FIG. The difference from the first embodiment is that a leaf spring is used as the elastic member 35 in the first embodiment, but the elastic member 49 is changed to a coil spring in the second embodiment. Since the other configuration of the range switching device of the second embodiment is the same as that of the first embodiment, the description thereof is omitted.

  As shown in FIGS. 8 and 9, the emergency operation mechanism 48 in the second embodiment includes a first lever 33, a second lever 34, an elastic member 49, and a shaft 38. The first lever 33 having the fan-shaped large gear 32 is fixed to the output shaft 20, and the second lever 34 is rotatably fitted to the first lever 33 with respect to the first lever 33. Has been. Further, the elastic member 49 is arranged so that the force acts in a direction in which the first lever 33 and the second lever 34 are separated from each other with respect to the rotation direction. Here, for example, by using a coil spring for the elastic member 49 and holding it in a compressed state, the emergency operation mechanism 48 can be configured more simply and at low cost.

  As a result, when a large torque is required for range switching according to vehicle specifications, in order to configure the elastic member with a leaf spring, there is a limit to the load that can be generated within the limited size of the range switching device. However, space can be saved by configuring the elastic member with a coil spring.

  As described above, according to the range switching device according to the second embodiment, by configuring the elastic member with the coil spring, it is possible to increase the load that can be generated while having the same effect as the first embodiment. It is possible to save the space of the range switching device.

  In the first embodiment and the second embodiment described above, the case where a leaf spring or a coil spring is used as the elastic member has been described. However, the present invention is not limited to this, and any elastic force can be used. It is possible to obtain the effects of the present invention.

Embodiment 3 FIG.
FIG. 10 is a cross-sectional view corresponding to FIG. 3 of the range switching device according to the third embodiment. The difference from the range switching device in FIG. 3 according to the first embodiment is that the metal wire 50 is attached to the shaft 38 and the operation lever 51 is provided on the metal wire 50 in the third embodiment. Since the other configuration of the range switching device of the third embodiment is the same as that of the first embodiment, the description thereof is omitted.

  The shaft 38 has a detent fitting part 20 b provided at the center position of the end of the output shaft 20 to which the first lever 33 is fixed and a detent fitting provided at the center position of the second lever 34. The portion 34a is detachably fitted. Further, the distal end portion 38a of the shaft 38 is inserted in a state of being in contact with the bottom surface 20c of the hole 36 at the end portion of the output shaft 20, and a force acts in a direction to press the shaft 38 toward the bottom surface 20c side of the hole 36 of the output shaft 20. As described above, a coil spring 39 is provided between the shaft 38 and the rear body 16. Further, an end 38b of the shaft 38 opposite to the bottom surface 20c of the hole 36 of the output shaft 20 is exposed to the outside of the range switching device 2 via a bearing 40 provided in the rear body 16, and this exposure is performed. A metal wire 50 is connected and fixed to the end portion 38b, and an operation lever 51 is provided on the other end of the metal wire 50.

  By pulling the operation lever 51, the shaft 38 is disengaged from the anti-rotation fitting portion 20b of the first lever 33 and the anti-rotation fitting portion 34a of the second lever 34. The compression force of the elastic member 35 held in a compressed state between the levers 34 is released, and the first lever 33 and the second lever 34 rotate in directions away from each other, and the second lever 34 The stopper portion 34b comes into contact with the stopper 21b provided in the front body 21 and stops, and the first lever 33 is connected to the P range stopper of the detent plate 7 in the transmission via the output shaft 20 and the shift shaft 6. (See FIG. 7).

Thereby, when it becomes necessary to operate the emergency operation mechanism 48 due to a decrease in the supply voltage to the range switching device 2, for example, the operation lever 51 is installed in the vehicle compartment, so that the vehicle operator It is possible to operate the emergency operation mechanism 48 of the range switching device 2 without moving outside the vehicle compartment, and it is possible to perform the P range insertion in an emergency more safely.

  If it is determined that range switching by the motor 14 can be performed after the supply voltage returns to the normal state, power is supplied to the motor 14 and the normal operation state is entered. When shifting to the D range, the first lever 33 fitted to the shift shaft 6 via the output shaft 20 is fitted to the first lever 33 while the elastic member 35 is compressed by the motor torque. When the shapes of the mating portion 20b and the anti-rotation fitting portion 34a of the second lever 34 coincide with each other, the biasing force of the coil lever that presses the first lever 33 and the second lever 34 provided on the shaft 38 is used. The shaft 38 is automatically inserted into the anti-rotation fitting portion 20b of the first lever 33 and the anti-rotation fitting portion 34a of the second lever 34, and is fitted into the normal operation state. It is possible to make attributed.

  As described above, according to the range switching device according to the third embodiment, by providing the operation lever for pulling out the shaft from the fitting portion in the vehicle compartment, it has the same effect as the first embodiment and moves outside the vehicle compartment. Thus, it is possible to operate the emergency operation mechanism of the range switching device, and there is an effect that the P range can be inserted more safely in an emergency.

Embodiment 4 FIG.
FIG. 11 is a cross-sectional view corresponding to FIG. 3 of the range switching device according to the fourth embodiment. The difference from the range switching device in FIG. 3 of the first embodiment is that an electromagnetic solenoid for operating the shaft 38 is provided in the fourth embodiment. Since the other configuration of the range switching device of the fourth embodiment is the same as that of the first embodiment, the description thereof is omitted.

  The shaft 38 has a detent fitting portion 20b provided at the center position of the end surface portion of the output shaft 20 to which the first lever 33 is fixed and a detent fitting provided at the center position of the second lever 34. The portion 34a is detachably fitted. Further, the distal end portion 38a of the shaft 38 is inserted in a state of being in contact with the bottom surface 20c of the hole 36 at the end portion of the output shaft 20, and a force acts in a direction to press the shaft 38 toward the bottom surface 20c side of the hole 36 of the output shaft 20. As described above, a coil spring 39 is provided between the shaft 38 and the rear body 16. Further, an electromagnetic solenoid 52 is provided on the end 38 b side of the shaft 38.

  When the vehicle control unit (ECU) determines whether there is an abnormality due to a decrease in supply voltage or the like, and determines that the emergency operation mechanism section 48 needs to be operated, the electromagnetic solenoid 52 is energized. As a result, the end 38b of the shaft 38 is pulled up by the generated magnetic force, and the tip end 38a, which is a non-rotating fitting portion of the shaft 38, is connected to the non-rotating fitting portion 20b of the first lever 33 and the second lever. 34, the compression force of the elastic member 35 held in a compressed state between the first lever 33 and the second lever 34 is released, and the first lever 33 and the second lever 34 are released. The second lever 34 rotates in a direction away from each other, and the second lever 34 stops with its stopper portion 34b abutting against a stopper 21b provided in the front body 21, and the first lever 33 is It stops at the P range stopper of the detent plate 7 in the transmission via the output shaft 20 and the shift shaft 6.

  After entering the P range, the shaft 38 is moved toward the first lever 33 and the second lever 34 by the coil spring 39 attached to the shaft 38 by stopping energization of the electromagnetic solenoid 52. Although it returns to the direction pressed, the fitting position of the detent fitting part 20b of the first lever 33 and the detent fitting part 34a of the second lever 34 is shifted, and the detent of the tip 38a of the shaft 38 is deviated. There is no problem because the part does not fit the anti-rotation fitting part 20b of the first lever 33 and the anti-rotation fitting part 34a of the second lever 34.

  As a result, when it becomes necessary to operate the emergency operating mechanism due to a decrease in the supply voltage to the range switching device 2, the vehicle control unit determines whether there is an abnormality and the emergency operating mechanism is By operating, the P range can be inserted, and the emergency operating mechanism can be operated more safely without depending on the judgment of the vehicle operator.

  If it is determined that range switching by the motor 14 can be performed after the supply voltage returns to the normal state, power is supplied to the motor 14 and the normal operation state is entered. When shifting to the D range, the first lever 33 fitted to the shift shaft 6 via the output shaft 20 is fitted to the first lever 33 while the elastic member 35 is compressed by the motor torque. When the shapes of the mating portion 20b and the anti-rotation fitting portion 34a of the second lever 34 coincide with each other, the biasing force of the coil lever that presses the first lever 33 and the second lever 34 provided on the shaft 38 is used. The shaft 38 is automatically inserted into the anti-rotation fitting portion 20b of the first lever 33 and the anti-rotation fitting portion 34a of the second lever 34, and is fitted into the normal operation state. It is possible to make attributed.

  In addition, the power supply to the electromagnetic solenoid 52 may use a reduced supply voltage of the vehicle, or may use a supply voltage stored separately by a capacitor or the like.

  Further, although the case where the shaft 38 is driven by the electromagnetic solenoid 52 has been described, the present invention is not limited to this. For example, the rotation operation of the motor may be converted into a linear motion, and an equivalent operation is performed by energization. Any power source and method can be used.

  As described above, according to the range switching device according to the fourth embodiment, the ECU determines whether or not the emergency operation mechanism part needs to be operated, and pulls out the shaft from the fitting part by the electromagnetic solenoid. In addition to the same effects as the first embodiment, it is possible to automatically operate the emergency operation mechanism unit, and it is possible to perform the P range insertion more safely in an emergency.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  Moreover, in the figure, the same code | symbol shows the same or an equivalent part.

    DESCRIPTION OF SYMBOLS 1 Shift range switching system, 2 Range switching device, 6 Shift shaft, 14 Motor, 17 Circuit board, 18 Reduction mechanism part, 20 Output shaft, 20b Non-rotation fitting part, 21b Stopper, 27 Sun gear, 28 Planetary gear, 29 Annular gear, 30 carrier, 31 small gear, 32 large gear, 33 first lever, 34 second lever, 34a detent fitting portion, 34b stopper portion, 35, 49 elastic member, 36 holes, 37 through hole, 38 Shaft, 38a Tip, 39 Coil spring, 41 Protection cap, 48 Emergency operating mechanism, 50 Metal wire, 51 Operation lever, 52 Electromagnetic solenoid

In order to solve the above problems, a range switching device according to the present invention includes a first lever having an output shaft that transmits rotation of a motor to a shift shaft that switches a shift range, and the same rotation shaft as the output shaft. A force acts in a direction in which the second lever, which has a rotation center axis and is rotatably fitted to the first lever, and the first lever and the second lever are separated from each other. The elastic member and the tip end portion are inserted in a through hole provided in the second lever and a hole provided in the output shaft so as to be detachable, and the first lever and the A shaft that prevents mutual rotation between the second levers, and a stopper that regulates a rotation angle with respect to each of the first lever and the second lever, are provided. is there.

Claims (9)

A first lever having an output shaft for transmitting rotation of the motor to a shift shaft for switching a shift range;
A second lever that has the same rotation center axis as the rotation axis of the output shaft and is rotatably fitted to the first lever;
An elastic member disposed such that a force acts in a direction in which the first lever and the second lever are separated from each other;
The distal end portion is removably inserted into a through hole provided in the second lever and a hole provided in the output shaft, and the mutual rotation between the first lever and the second lever is performed. A blocking shaft,
A range switching device characterized by comprising:   The said hole and the said through-hole have the same hole shape, and the shape of the front-end | tip part of the said shaft is formed so that it may wedge over the said hole and the said through-hole. Range switching device.   The range switching device according to claim 1, wherein a stopper that regulates a rotation angle is provided for each of the first lever and the second lever.   The range switching device according to claim 1, wherein the shaft is provided with a coil spring in which a force acts in a direction in which the shaft is pressed against the first lever and the second lever.   The range switching device according to claim 1, wherein the elastic member is a leaf spring.   The range switching device according to claim 1, wherein the elastic member is a coil spring.   2. The shaft according to claim 1, wherein an end of the shaft opposite to an end of the first lever and the second lever that is wedged is exposed to the outside so as to be detachable. The range switching device according to any one of 1 to 6.   The shaft is exposed to the outside so that the end opposite to the end that wedges with the first lever and the second lever can be inserted and removed, and the end on the opposite side 7. The range according to claim 1, wherein a metal wire is attached to the shaft, and the shaft can be inserted and removed from a remote location by operating the metal wire. Switching device.   The shaft is provided with an electromagnetic actuator at an end opposite to the end side that wedges with the first lever and the second lever, and the electromagnetic actuator is energized or de-energized. The range switching device according to any one of claims 1 to 6, wherein the range switching device is insertable / removable.

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