JP6173503B1 - Range switching device - Google Patents

Abstract

A range switching device capable of simplifying the structure of a shift-by-wire system and switching the position of a shift range even when power is not supplied due to an abnormality in a power supply system. An electric motor, a drive shaft that rotates by driving the electric motor, a reduction gear device that amplifies and outputs torque generated on the drive shaft, and a shift shaft of an automatic transmission are provided. And an output shaft 24 that transmits the torque amplified by the reduction gear device 23 to the shift shaft 31, and an auxiliary drive device 26 that has a handle 261 and rotates the output shaft 24 when the handle 261 is operated. The auxiliary drive device 26 includes a contact portion 28 and a stopper that restricts the rotation of the output shaft 24 by contacting the contact portion 28. [Selection] Figure 2

Description

  The present invention relates to a range switching device in a shift-by-wire system that switches 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 via an electrical signal in accordance with a command from a vehicle operator has been adopted. The vehicle is required to be able to stop reliably and to be towable even if 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 parking the shift range of the automatic transmission or by using a parking brake. Further, the vehicle can be easily pulled by switching the position of the shift range of the automatic transmission from parking to another.

  On the other hand, in the case of a vehicle to which the shift-by-wire system is applied, the position of the shift range of the automatic transmission is electrically switched. When this occurs, it becomes difficult to switch the position of the shift range of the automatic transmission. For this reason, even in a vehicle to which the shift-by-wire system is applied, there is a need for a range switching device that can switch the position of the shift range of the automatic transmission when an abnormality occurs in the vehicle for some reason.

  Conventionally, as a method of switching the position of the shift range of an automatic transmission when an abnormality occurs in the power supply system, the shift-by-wire system has been provided with manual operation means, and shifts to manual operation means when operating the shift range by driving an electric motor. When the movement of the range operation unit is not transmitted and the electric motor does not function, the shift range operation unit is mechanically linked based on the operation of the manual operation unit, and the shift range position can be switched by the manual operation unit. Accordingly, the vehicle can be stopped safely and reliably, and the parked vehicle can be easily moved by, for example, towing (see, for example, Patent Document 1).

JP 2002-327843 A

  However, in the conventional range switching device that mechanically interlocks the shift range operation unit based on the operation of the manual operation means when power is not supplied due to an abnormality in the power supply system, the electromagnetic clutch is connected to the worm gear, the worm wheel, and the shift range operation unit. The electromagnetic clutch that is used only in an emergency, because the position of the shift range by manual operation means is switched by placing it between the worm gear and the worm wheel so that the shift range operation unit is released. Therefore, the structure of the shift-by-wire system is complicated, and as a result, the cost of the shift-by-wire system is increased.

  The present invention has been made to solve the above-described problems, and simplifies the structure of a shift-by-wire system and switches the position of the shift range even when power is not supplied due to an abnormality in the power supply system. Provided is a range switching device capable of

A range switching device according to the present invention is provided in mesh with an electric motor, a drive shaft that rotates by driving the electric motor, a reduction gear device that amplifies and outputs torque generated on the drive shaft, and a shift shaft of an automatic transmission. An auxiliary drive comprising: an output shaft for transmitting torque amplified by the reduction gear device to the shift shaft; and an auxiliary drive device having a manual operation unit that rotates the output shaft when the manual operation unit is operated. When the manual operation unit is operated at a position corresponding to a position where the position of the shift range of the automatic transmission and the automatic transmission is a preset position, the device is configured to abut the output shaft. and a stopper for restricting the rotation, the auxiliary drive, an auxiliary drive shaft that rotates together with the drive shaft provided in the drive shaft, the manual operation portion by manual operating section is operated Rotating the auxiliary drive shaft, the output shaft torque of the auxiliary drive shaft is rotated by being transmitted via a drive shaft and reduction gear.

  According to the range switching device according to the present invention, even when an abnormality occurs in the power supply system to the range switching device and the motor that drives the drive shaft does not operate normally, the manual operation unit is operated. The position of the shift range can be switched by rotating the output shaft until the stopper contacts the contact portion. This makes it possible to switch the position of the shift range without complicating the structure of the shift-by-wire system and when power is not supplied due to an abnormality in the power supply system.

It is a whole lineblock diagram showing the shift range switching system provided with the range switching device concerning Embodiment 1 of this invention. It is a sectional side view which shows the range switching apparatus of FIG. It is a sectional side view which shows the other state of the range switching apparatus of FIG. It is a top view which shows the lever of FIG. It is a top view which shows the state which the lever of FIG. 2 displaced. It is a sectional side view which shows the range switching apparatus which concerns on Embodiment 2 of this invention. It is a top view which shows an arm in case the position of a shift range exists in a drive in the range switching apparatus of FIG. It is a top view which shows an arm when the position of a shift range exists in parking in the range switching apparatus of FIG. It is a sectional side view which shows the range switching apparatus which concerns on Embodiment 3 of this invention. FIG. 10 is a plan view showing an auxiliary drive gear when the position of the shift range is in the drive in the range switching device of FIG. 9. FIG. 10 is a plan view showing an auxiliary drive gear when the shift range position is parking in the range switching device of FIG. 9. It is a sectional side view which shows the range switching apparatus which concerns on Embodiment 4 of this invention. It is a top view which shows the auxiliary drive part in case the position of a shift range exists in a drive in the range switching apparatus of FIG. It is a top view which shows the auxiliary drive part in case the position of a shift range exists in parking in the range switching apparatus of FIG.

Embodiment 1 FIG.
1 is an overall configuration diagram showing a shift range switching system including a range switching device according to Embodiment 1 of the present invention. The shift range switching system 1 includes a range switching device 2, a detent mechanism 3 that is displaced by driving the range switching device 2, a parking mechanism 4 that operates according to the displacement of the detent mechanism 3, and a displacement of the detent mechanism 3. And a hydraulic control mechanism 5 that operates.

  For example, the range switching device 2 is configured to be attached to an automatic transmission mounted on a vehicle. The range switching device 2 includes a connector 21 to which a shift signal that is an electrical signal from a shift lever that is a range selection means selected by a vehicle operator is supplied.

  The detent mechanism 3 is inserted into a shift shaft 31 that is rotated by driving the range switching device 2, a substantially fan-shaped detent plate 32 fixed to the shift shaft 31, and a plurality of recesses 33 formed in the detent plate 32. The detent spring 34 is provided. The detent spring 34 functions as a leaf spring. The tip of the detent spring 34 is pressed into the recess 33 and inserted into the recess 33. Thereby, the position of the detent plate 32 is maintained.

  The parking mechanism 4 includes a parking rod 41 connected to the detent plate 32, a conical portion 42 provided at the tip of the parking rod 41, a parking pole 43 that performs seesaw motion in accordance with the displacement of the conical portion 42, a parking pole 43 is provided with a parking gear 44 that meshes with 43. The parking rod 41 is displaced as the detent plate 32 rotates forward and backward. The conical portion 42 is displaced with the displacement of the parking rod 41. The parking pole 43 has a shaft 431 and performs a seesaw motion up and down around the shaft 431 as the conical portion 42 is displaced. The parking pole 43 has a convex portion 432. A plurality of grooves 441 are formed in the parking gear 44 side by side. In the parking pole 43, the convex portion 432 is fitted into the groove 441 or the convex portion 432 is detached from the groove 441 by the seesaw motion of the parking pole 43. Thereby, locking and unlocking of the parking mechanism 4 are achieved. When the locking and unlocking of the parking mechanism 4 is achieved, the parking gear 44 is prevented from rotating or the parking gear 44 can be rotated.

  The hydraulic control mechanism 5 includes a valve body 51 and a spool valve 52 provided in the valve body 51 so as to be reciprocally movable. As the spool valve 52 moves, the oil passage 53 formed in the valve body 51 is switched, and the position of the shift range is P (parking), R (reverse), N (neutral), D (drive), etc. Can be switched to. A detent spring 34 is fixed to the valve body 51. The spool valve 52 is connected to the detent plate 32. Therefore, the spool valve 52 is displaced as the detent plate 32 rotates forward and backward.

  As described above, in the shift range switching system 1, the shift shaft 31 and the spool valve 52 are interlocked with each other via the detent plate 32. Therefore, by controlling the rotation angle of the shift shaft 31, The position can be controlled and the shift range can be arranged at a preset position.

  Next, the configuration and operation of the range switching device 2 will be described. 2 is a side sectional view showing the range switching device 2 in FIG. 1, and FIG. 3 is a side sectional view showing another state of the range switching device 2 in FIG. In the figure, the range switching device 2 includes an electric motor 221 and a main drive device 22 having a drive shaft 222 that rotates by driving of the electric motor 221, a reduction gear device 23 that amplifies and outputs torque of the drive shaft 222, and a reduction gear device. Output torque 24 transmitted to the shift shaft 31 of the vehicle, a rotation angle detection device 25 for detecting the rotation angle of the output shaft 24, and the driving force of the electric motor 221 are set in advance. The auxiliary drive device 26 including a handle 261 as a drive source that rotates the output shaft 24 to a position corresponding to the position of the shift range as a drive source, the main drive device 22, the reduction gear device 23, the output shaft 24, and the rotation And a housing 27 surrounding the angle detection device 25. The housing 27 includes a housing 271 and a cover 272.

  The electric motor 221 is a brushless motor using a permanent magnet. The electric motor 221 includes a rotor 223 that is rotatably supported, a magnet 224 that is fixed to the rotor 223, and a stator 225 that is disposed concentrically with the rotation center of the rotor. The rotor 223 is fixed to the drive shaft 222. The magnet 224 is fixed to the rotor 223 by means such as adhesion. The main drive device 22 further includes a rolling bearing 226 and a rolling bearing 227 provided in the housing 27. The drive shaft 222 is rotatably supported by the housing 27 via a rolling bearing 226 and a rolling bearing 227. The shaft centers of the output shaft 24 and the drive shaft 222 are arranged away from each other in a direction perpendicular to the shaft.

  The stator 225 includes a stator core 228 and a coil 229 provided on the stator core 228. The stator core 228 has a plurality of stator teeth extending in the radial direction. The coil 229 is wound around each stator tooth. Coil 229 forms a three-phase connection composed of a U phase, a V phase, and a W phase.

  The reduction gear device 23 includes a planetary gear reduction mechanism and a spur gear reduction mechanism. Specifically, the reduction gear device 23 includes an annular gear having a sun gear 231 attached to the drive shaft 222, a planetary gear 232 that meshes with the sun gear 231, and an internal gear groove that meshes with the planetary gear 232 formed on the inner peripheral surface. A gear 233, a carrier 234 that supports the planetary gear 232 so as to rotate and revolve, a carrier coupling gear 235 attached to the carrier 234 on the opposite side of the planetary gear 232, a carrier coupling gear 235 fixed to the output shaft 24, And a lever 236 in which an internal gear groove that is a first gear groove to be engaged is formed.

  The rotation angle detection device 25 includes a magnet 251 provided at the end of the output shaft 24 and a detection device main body 252 provided in the housing 27 so as to face the magnet 251. The magnet 251 and the detection device main body 252 are arranged coaxially. When the detection device main body 252 detects the direction of the magnetic flux of the magnet 251 that rotates with the output shaft 24, the rotation angle detection device 25 detects the position of the shift range.

  The auxiliary drive device 26 is capable of manually switching the position of the shift range. The auxiliary drive device 26 includes a handle 261 to be operated and an auxiliary drive shaft 262 that rotates when the handle 261 is operated. The auxiliary drive shaft 262 is inserted into a hole formed in the drive shaft 222. The hole is formed in a non-rotating shape. The auxiliary drive shaft 262 is formed so as to be able to fit into a hole detent shape. The auxiliary drive device 26 further includes a protective plug 263 that covers the hole of the drive shaft 222 from which the auxiliary drive shaft 262 is pulled out when the electric motor 221 operates normally. Torque generated in the auxiliary drive shaft 262 by operating the handle 261 is transmitted to the output shaft 24 via the drive shaft 222 and the reduction gear device 23.

  4 is a plan view showing the lever 236 of FIG. 2, and FIG. 5 is a plan view showing a state in which the lever 236 of FIG. 2 is displaced. The range switching device 2 further includes a contact portion 28 provided in the housing 27 and an adjustment screw 29 that displaces the contact portion 28. The position of the contact portion 28 with respect to the housing 27 is changed by rotating the adjustment screw 29. The abutting portion 28 is disposed so as to abut on the lever 236 when the parking is a position where the position of the shift range is set in advance. Therefore, in this example, the lever 236 has a function as a stopper.

  Adjustment of the position of the contact portion 28 with respect to the casing 27 by the adjustment screw 29 is performed in a state where the range switching device 2 is attached to the vehicle or the automatic transmission and the detent plate 32 is in a position corresponding to parking.

  In the range switching device 2, when the power supply to the range switching device 2 is normal, the torque generated by driving the electric motor 221 is decelerated via the sun gear 231, the planetary gear 232, the annular gear 233 and the carrier 234. And transmitted to the carrier coupling gear 235. The torque transmitted to the carrier coupling gear 235 is formed with an internal gear groove that meshes with the carrier coupling gear 235, decelerated by the lever 236, and transmitted to the output shaft 24. Further, when it is determined that the shift of the shift range position by the main drive unit 22 cannot be executed due to a decrease in the supply voltage to the range switch unit 2 or the like, the position of the shift range manually by using the auxiliary drive unit 26 is determined. Transition to switching.

  The meshing position of the carrier coupling gear 235 and the lever 236 includes a meshing state corresponding to the case where the shift range position shown in FIG. 3 is a drive, and a meshing state corresponding to the case where the shift range position shown in FIG. 4 is a parking position. Or a meshing state corresponding to the case where the position of the shift range is reverse or neutral between them, and the position of the shift range by manual operation is set to the position where the contact portion 28 and the lever 236 contact each other. By turning 261, the shift range position is switched to parking.

  As described above, according to the range switching device according to the first embodiment of the present invention, the auxiliary drive device 26 that can manually switch the position of the shift range is provided, so that the supply to the range switching device 2 is performed. Even if the voltage drops and it becomes difficult to switch the position of the shift range with the electric motor 221, it is possible to switch the position of the shift range by driving with the auxiliary drive device 26. Thus, the vehicle can be stopped safely. Also, when the power supply to the range switching device 2 is normal, it is restored and when it is determined that the shift of the shift range position by the electric motor 221 can be executed, no special operation is required and the normal shift range position. Can be switched. This makes it possible to switch the position of the shift range without complicating the structure of the shift-by-wire system and when power is not supplied due to an abnormality in the power supply system.

  In addition, since the handle 261 can be detached from the drive shaft 222, the shift range position switching by a driver or a third party above the passenger can be prevented, and an anti-theft effect can be obtained.

Embodiment 2. FIG.
6 is a side sectional view showing a range switching apparatus according to Embodiment 2 of the present invention. In the second embodiment, the auxiliary drive device 26 that enables manual switching of the shift range position includes an arm 264 that extends in the radial direction from the output shaft 24, and a shaft 265 that is a manual operation unit fixed to the arm 264. And. In this example, the arm 264 has a stopper function. Other configurations are the same as those in the first embodiment.

  7 is a plan view showing the arm 264 when the shift range position is in the drive in the range switching device of FIG. 6, and FIG. 8 is a plan view of the arm 264 when the shift range position is in the parking in the range switching device of FIG. FIG. When the shaft 265 is operated, the arm 264 rotates about the output shaft 24. Thereby, the output shaft 24 rotates. The arm 264 contacts the contact portion 28 when the shift range is in the parking position. When the arm 264 contacts the contact portion 28, the rotation of the arm 264 is restricted.

  As described above, according to the range switching device according to the second embodiment of the present invention, the arm 264 of the auxiliary drive device 26 is connected to the output shaft 24. The number of rotations due to the operation can be suppressed.

Embodiment 3 FIG.
FIG. 9 is a side sectional view showing a range switching apparatus according to Embodiment 3 of the present invention. In the third embodiment, the auxiliary drive device 26 that can manually switch the position of the shift range further includes an auxiliary drive gear 266 that meshes with a second gear groove 237 formed in the lever 236. The auxiliary drive shaft 262 is fixed to the auxiliary drive gear 266. When the auxiliary drive shaft 262 rotates by operating the handle 261, the auxiliary drive gear 266 rotates. As the auxiliary drive gear 266 rotates, the lever 236 rotates and the output shaft 24 rotates. That is, torque generated by the auxiliary driving device 26 by turning the handle 261 is transmitted to the output shaft 24 via the lever 236.

  FIG. 10 is a plan view showing the auxiliary drive gear 266 when the shift range position is in the drive in the range switching device of FIG. 9, and FIG. 11 is an auxiliary view when the shift range position is parking in the range switching device of FIG. It is a top view which shows the drive gearwheel 266. FIG. The auxiliary drive gear 266 has a stopper 267 that abuts against the abutment portion 28 to prevent further rotation when the shift range is in the parking position.

  The range in which the second gear groove 237 is formed in the lever 236 is a range in which the second gear groove 237 and the auxiliary drive gear 266 are engaged while the position of the shift range is displaced between the drive and the parking. . Therefore, the second gear groove 237 and the auxiliary drive gear 266 mesh with each other when the shift range is in the drive, reverse, neutral and parking positions. Thereby, the position of the shift range by manual operation can be switched to parking by operating the handle 261 until the stopper 267 and the contact portion 28 contact each other. Other configurations are the same as those in the first embodiment.

  As described above, according to the range switching device according to the third embodiment of the present invention, the auxiliary drive device 26 rotates the output shaft 24 without passing through the reduction gear device 23, so that it is compared with the first embodiment. Thus, the number of rotations due to manual operation can be suppressed.

Embodiment 4 FIG.
12 is a side sectional view showing a range switching apparatus according to Embodiment 4 of the present invention. In the fourth embodiment, the auxiliary drive device 26 that enables manual switching of the shift range position further includes an auxiliary drive unit 268 formed with a third gear groove that meshes with the carrier coupling gear 235. The auxiliary drive shaft 262 is fixed to the auxiliary drive unit 268. When the auxiliary drive shaft 262 rotates by operating the handle 261, the auxiliary drive unit 268 rotates. As the auxiliary driving unit 268 rotates, the carrier coupling gear 235 rotates and the lever 236 rotates about the output shaft 24. As a result, the output shaft 24 rotates. That is, the torque generated in the auxiliary drive device 26 by turning the handle 261 rotates the lever 236 via the carrier coupling gear 235 and is transmitted to the output shaft 24.

  13 is a plan view showing the auxiliary drive unit 268 when the shift range position is in the drive in the range switching device of FIG. 12, and FIG. 14 is an auxiliary view when the shift range position is in the parking in the range switching device of FIG. FIG. 11 is a plan view showing a drive unit 268. The auxiliary drive unit 268 has a stopper 269 that abuts against the abutment portion 28 to prevent further rotation when the shift range is in the parking position. Other configurations are the same as those in the first embodiment.

  As described above, according to the range switching device according to the fourth embodiment of the present invention, the auxiliary drive device 26 is not connected to the planetary gear reduction mechanism, but is connected to the spur gear reduction mechanism. Compared to 1, the number of rotations due to manual operation can be suppressed, and compared to the second embodiment, the torque generated by manual operation can be amplified and transmitted to the output shaft. Can be performed more easily.

  In each of the above-described embodiments, the configuration in which the handle 261 and the auxiliary drive shaft 262 are detached from the range switching device 2 when the electric motor operates normally has been described, but the present invention is not limited to this, and the handle 261 and the auxiliary drive shaft 262 are not limited thereto. May be configured to be always attached to the range switching device 2.

  In the third and fourth embodiments, the configuration in which the gear mechanism transmits the torque generated by the auxiliary drive device 26 to the output shaft 24 has been described. However, the configuration is not limited to the gear mechanism, and for example, a belt or a sprocket For example, a torque transmission mechanism may be used. In addition, the speed ratio of the gear mechanism can be amplified by manually operating torque and transmitted to the output shaft 24 in the case of deceleration, so that manual operation can be easily performed.

  Further, the present invention can be freely combined with each other within the scope of the present invention, or can be appropriately modified or omitted from each embodiment.

  1 shift range switching system, 2 range switching device, 3 detent mechanism, 4 parking mechanism, 5 hydraulic control mechanism, 21 connector, 22 main drive device, 23 reduction gear device, 24 output shaft, 25 rotation angle detection device, 26 auxiliary drive Device, 27 Housing, 28 Abutting part, 29 Adjustment screw, 31 Shift shaft, 32 Detent plate, 33 Recessed part, 34 Detent spring, 41 Parking rod, 42 Conical part, 43 Parking pole, 44 Parking gear, 51 Valve body 52 Spool valve, 53 Oil passage, 221 Electric motor, 222 Drive shaft, 223 Rotor, 224 Magnet, 225 Stator, 226 Rolling bearing, 227 Rolling bearing, 228 Stator core, 229 Coil, 231 Sun gear, 232 Planetary gear, 233 Ring Car, 234 carrier, 235 carrier coupling gear, 236 lever, 237 second gear groove, 251 magnet, 252 detector main body, 261 handle, 262 auxiliary drive shaft, 263 protective plug, 264 arm, 265 shaft, 266 auxiliary drive gear, 267 stopper, 268 auxiliary drive part, 269 stopper, 271 housing, 272 cover, 431 shaft, 432 convex part, 441 groove.

Claims (7)

An electric motor,
A drive shaft that rotates by driving the electric motor;
A reduction gear device that amplifies and outputs torque generated in the drive shaft;
An output shaft that meshes with a shift shaft of an automatic transmission and transmits the torque amplified by the reduction gear device to the shift shaft;
An auxiliary drive device that has a manual operation unit and rotates the output shaft when the manual operation unit is operated,
When the manual operation unit is operated at a position corresponding to a position where the position of the shift range of the automatic transmission is a preset position, the auxiliary driving device is A stopper for restricting the rotation of the output shaft by abutting ,
The auxiliary drive device has an auxiliary drive shaft provided on the drive shaft and rotating together with the drive shaft,
The manual operation unit rotates the auxiliary drive shaft by operating the manual operation unit,
The output shaft is a range switching device that rotates when torque of the auxiliary drive shaft is transmitted through the drive shaft and the reduction gear device. An electric motor,
A drive shaft that rotates by driving the electric motor;
A reduction gear device that amplifies and outputs torque generated in the drive shaft;
An output shaft that meshes with a shift shaft of an automatic transmission and transmits the torque amplified by the reduction gear device to the shift shaft;
An auxiliary drive device that has a manual operation unit and rotates the output shaft when the manual operation unit is operated,
When the manual operation unit is operated at a position corresponding to a position where the position of the shift range of the automatic transmission is a preset position, the auxiliary driving device is A stopper for restricting the rotation of the output shaft by abutting ,
The reduction gear device includes a sun gear coupled to the drive shaft, one or more planetary gears meshed with the sun gear and disposed on a circumference around the drive shaft, and the planetary gear. An annular gear formed with meshing internal gear grooves, a carrier that supports the planetary gear so as to rotate and revolve, a carrier coupling gear coupled to the carrier, a fixed to the output shaft, and a radial direction from the output shaft A lever formed with a first gear groove extending and meshing with the carrier coupling gear, and the torque of the drive shaft is the sun gear, the planetary gear, the annular gear, the carrier, the carrier coupling gear and the lever. Is transmitted to the output shaft via
The auxiliary driving device includes an auxiliary driving gear for rotating the output shaft via the lever by meshing with a second gear groove formed on the lever, and an auxiliary driving rotating with the auxiliary driving gear. A shaft,
The manual operation unit rotates the auxiliary drive shaft by operating the manual operation unit,
The output shaft is a range switching device that rotates when torque of the auxiliary drive shaft is transmitted through the auxiliary drive gear and the lever . An electric motor,
A drive shaft that rotates by driving the electric motor;
A reduction gear device that amplifies and outputs torque generated in the drive shaft;
An output shaft that meshes with a shift shaft of an automatic transmission and transmits the torque amplified by the reduction gear device to the shift shaft;
An auxiliary drive device that has a manual operation unit and rotates the output shaft when the manual operation unit is operated,
When the manual operation unit is operated at a position corresponding to a position where the position of the shift range of the automatic transmission is a preset position, the auxiliary driving device is A stopper for restricting the rotation of the output shaft by abutting ,
The reduction gear device includes a sun gear coupled to the drive shaft, one or more planetary gears meshed with the sun gear and disposed on a circumference around the drive shaft, and the planetary gear. An annular gear formed with meshing internal gear grooves, a carrier that supports the planetary gear so as to rotate and revolve, a carrier coupling gear coupled to the carrier, a fixed to the output shaft, and a radial direction from the output shaft A lever formed with a first gear groove extending and meshing with the carrier coupling gear, and the torque of the drive shaft is the sun gear, the planetary gear, the annular gear, the carrier, the carrier coupling gear and the lever. Is transmitted to the output shaft via
The auxiliary driving device includes a third gear that meshes with the carrier coupling gear and is rotated to rotate the output shaft via the carrier coupling gear and the lever, and the auxiliary driving unit. An auxiliary drive shaft that rotates,
The manual operation unit rotates the auxiliary drive shaft by operating the manual operation unit,
The output shaft rotates as the torque of the auxiliary drive shaft is transmitted through the auxiliary drive unit, the carrier coupling gear and the lever . An electric motor,
A drive shaft that rotates by driving the electric motor;
A reduction gear device that amplifies and outputs torque generated in the drive shaft;
An output shaft that meshes with a shift shaft of an automatic transmission and transmits the torque amplified by the reduction gear device to the shift shaft;
An auxiliary drive device that has a manual operation unit and rotates the output shaft when the manual operation unit is operated,
When the manual operation unit is operated at a position corresponding to a position where the position of the shift range of the automatic transmission is a preset position, the auxiliary driving device is A stopper for restricting the rotation of the output shaft by abutting ,
A housing surrounding the electric motor, the drive shaft, and the reduction gear device;
The range switching device is provided so that the contact portion can be displaced with respect to the housing so as to contact the stopper when the position of the shift range is a preset position . The auxiliary drive device has an arm fixed to the output shaft and extending in a radial direction from the output shaft,
The manual operation unit rotates the arm around the output shaft by operating the manual operation unit,
The range switching device according to claim 4 , wherein the output shaft rotates when torque of the arm is transmitted. The auxiliary drive device has a hole into which the manual operation unit is inserted,
The range switching device according to any one of claims 1 to 5 , wherein the manual operation unit is attachable to and detachable from the hole. The range switching device according to claim 6 , wherein the auxiliary drive device further includes a protective plug that covers the hole when the manual operation unit is removed from the hole.

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