JP2012072854A - Electric actuator for parking lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release a parking lock when the motor-driven parking lock and a motor cannot be operated without interfering the release of the parking lock.SOLUTION: An electric actuator 60 for driving a parking lock mechanism includes: a fan-shaped gear 70 which is connected to a parking rod 46, rotatably supported to a drive shaft 69 which is rotatively driven by the electric motor 62, rotatively driven by the electric motor 62, does not rotate integrally with the drive shaft 69 when the drive shaft 69 turns between a lock position and a lock release position, and rotates integrally with the drive shaft 69 when the drive shaft 69 is rotated in the release direction while the drive shaft is in the lock position; and a mechanism using a rack 76 which can rotate the fan-shaped gear 70 in the release direction by manual operation.

Description

  The present invention relates to an electric actuator for parking lock, and more particularly to an electric actuator for parking lock that moves a parking rod for engaging and disengaging a parking pole and a parking gear of a parking lock mechanism.

  Conventionally, as a technique related to this type of parking lock electric actuator, there is a need for range switching by having a first electric actuator for a manual valve that performs range switching and a second electric actuator for a parking lock mechanism. There has been proposed a shift-by-wire automatic transmission that can achieve both high speed and high torque output required when the parking lock mechanism is operated (see, for example, Patent Document 1).

JP 2004-169877 A

  In the above-described electric actuator for the parking lock mechanism, the parking lock cannot be released if the motor constituting the electric actuator becomes inoperable due to a power failure or a drive circuit failure in the parking lock state. In addition, the vehicle cannot be moved. Thus, it is conceivable that the parking lock can be manually released. In this case, however, it is necessary to prevent the original parking lock and parking lock release operations by the motor from being hindered.

  The main object of the electric actuator of the present invention is to enable the parking lock to be released when the electric motor becomes inoperable without preventing the parking lock by the electric motor and the release of the parking lock.

  The electric actuator for parking lock according to the present invention adopts the following means in order to achieve the main object described above.

The electric actuator for parking lock of the present invention comprises:
A parking lock electric actuator for moving a parking rod for engaging and disengaging a parking pole and a parking gear of a parking lock mechanism,
An electric motor,
A lock position, which is connected to the parking rod and is driven to rotate by the electric motor to engage the parking pawl and the parking gear, is disengaged from the locked position and the parking pawl and the parking gear. A drive shaft that rotates between a lock release position that is a rotation stop position when
When the drive shaft is rotatably supported by the drive shaft and is driven to rotate by the electric motor so that the drive shaft rotates between the lock position and the unlock position, the drive shaft does not rotate integrally with the drive shaft. A rotating member that rotates integrally with the drive shaft when the shaft is rotated in a predetermined direction with the shaft in the locked position;
A manual rotation mechanism that allows the rotation member to rotate in the one direction by manual operation;
It is a summary to provide.

  The electric actuator for parking lock according to the present invention is rotatably supported by a drive shaft that is connected to a parking rod and is rotationally driven by an electric motor, and is driven to rotate by the electric motor so that the drive shaft has a lock position and an unlock position. A rotating member that does not rotate integrally with the drive shaft when rotating between them, and that rotates integrally with the drive shaft when the drive shaft is rotated in a predetermined direction with the drive shaft in the locked position; And a manual rotation mechanism that enables rotation in one direction by manual operation. Therefore, when the electric motor can operate normally and the drive shaft is driven to rotate by the electric motor, the rotating member does not rotate integrally with the drive shaft, and therefore, the rotating member prevents the electric motor from locking and releasing the parking lock. There is no. On the other hand, when the electric motor becomes inoperable with the parking pole and the parking gear engaged, if the manual rotation mechanism is manually operated to rotate the rotating member in a predetermined direction, the drive shaft Since it rotates in one direction integrally with the rotating member, the engagement between the parking pole and the parking gear can be released with the rotation of the drive shaft. Thus, the parking lock can be released when the electric motor becomes inoperable without hindering the parking lock by the electric motor and the release of the parking lock.

  In such an electric actuator for parking lock of the present invention, a gear including an input gear meshing with a gear fixed to the rotating shaft of the electric motor, and an output gear fixed to the drive shaft and rotating in conjunction with the input gear. The rotating member is not engaged with the output gear of the gear mechanism when the drive shaft is driven to rotate by the electric motor and rotates between the locked position and the unlocked position. The shaft may be a member that engages with the output gear of the gear mechanism and rotates integrally with the output gear when the shaft is rotated in the one direction in the locked position. In this way, when the drive shaft is rotated by the electric motor and the drive shaft rotates between the lock position and the unlock position, the rotation member does not rotate integrally with the drive shaft, and the manual rotation mechanism is manually operated. The rotating member and the drive shaft can be rotated together. Further, since the electric motor and the drive shaft are connected via the gear mechanism, the drive shaft can be rotationally driven by a smaller electric motor.

  In the parking lock electric actuator of the present invention having this gear mechanism, at least one of the rotation member and the output gear of the gear mechanism has a rotation range from the lock position to the unlock position of the drive shaft. An arc-shaped slit having a circumference corresponding to a central angle is formed, and a pin loosely fitted in the slit is fixed to the other of the output gear of the rotating member and the gear mechanism; You can also In this way, when the drive shaft is rotated by the electric motor and rotates between the lock position and the unlock position, the inside of the slit formed in one of the rotation member and the output gear passes through the other of the rotation member and the output gear. Since the pin fixed to the shaft moves along the slit, the rotating member remains stationary even when the drive shaft rotates and does not engage with the output gear. Therefore, the rotating member does not prevent the parking lock and the parking lock from being released by the electric motor. Further, when the manual rotation mechanism is manually operated, the pin and the rotation member are engaged with each other at one end of the slit as the rotation member rotates in one direction. Therefore, the rotation member and the output gear are rotated and driven together. The shaft can be rotated so that the engagement between the parking pole and the parking gear is released.

  In the parking lock electric actuator of the present invention having a gear mechanism, the manual rotation mechanism includes a gear portion formed on an outer periphery of the rotation member and a rack meshing with the gear portion. It can also be. If it carries out like this, it will become possible to rotate a rotation member to one direction by moving a rack to the extension direction by manual operation.

  Furthermore, in the electric actuator for parking lock according to the aspect of the invention including a gear mechanism, the electric motor may be arranged so that an axial direction of the rotating shaft and an axial direction of the drive shaft are orthogonal to each other. it can. In this way, the electric motor can be arranged so that the axial direction of the output shaft of the transmission to which the parking gear is attached (longitudinal direction of the transmission) and the axial direction of the rotating shaft of the electric motor coincide with each other. The mountability of the parking lock electric actuator to the transmission can be improved. In this case, the gear fixed to the rotating shaft of the electric motor may be a worm, and the input gear of the gear mechanism may include the worm and a worm wheel constituting the worm gear. In this way, when the rotating member is rotated in one direction by manually operating the manual rotating mechanism, the rotating shaft of the electric motor can be rotated even through the worm gear, so that the rotation of the drive shaft is hindered. Can be suppressed.

It is a block diagram which shows the outline of a structure of the motor vehicle 10 carrying the shift-by-wire system 30 provided with the electric actuator 60 which is one Example of this invention. 3 is a perspective view showing configurations of an electric actuator 60 and a parking lock mechanism 40. FIG. FIG. 3 is an explanatory diagram illustrating the structure of an electric actuator 60. Explanatory drawing which shows typically the relationship between the slit 72 of the sector gear 70 and the pin 68a of the output gear 68 when the electric motor 62 of the electric actuator 60 can operate normally and the drive shaft 69 is rotationally driven by the electric motor 62. It is. Explanatory drawing schematically showing the relationship between the slit 72 of the sector gear 70 and the pin 68a of the output gear 68 when the electric motor 62 of the electric actuator 60 is inoperable and the parking lock is forcibly released by manual operation of the rack 76. Is

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of a configuration of an automobile 10 equipped with a shift-by-wire system 30 including an electric actuator 60 according to an embodiment of the present invention. As shown in the figure, an automobile 10 according to an embodiment includes an engine 12 as an internal combustion engine that outputs power by the explosive combustion of a hydrocarbon-based fuel such as gasoline or light oil, and a gear mechanism that shifts the power input from the engine 12 and shifts the power. 28, the automatic transmission 20 that outputs to the drive wheels 16a and 16b via the differential gear 29, the shift-by-wire system 30 that electrically switches the shift range of the automatic transmission 20 according to the shift operation by the driver, and the entire vehicle. A main electronic control unit (hereinafter referred to as a main ECU) 80.

  The engine 12 is controlled by an engine electronic control unit (hereinafter referred to as “engine ECU”) 14, and the automatic transmission 20 includes an automatic transmission electronic control unit (hereinafter referred to as “ATECU”) 26 and a shift-by-wire system electronic control unit (hereinafter referred to as “electronic control unit”). (Referred to as SBWECU) 36. The main ECU 80 detects the ignition signal from the ignition switch 81, the shift position SP from the shift position sensor 82 that detects the operation position of the shift lever, the accelerator opening from the accelerator pedal position sensor 84, and the brake pedal from the brake pedal position sensor 86. The position and the vehicle speed from the vehicle speed sensor 88 are input and various signals are output, and various control signals and data are exchanged by communication with the engine ECU 14, the AT ECU 26, and the SBWECU 36.

  The automatic transmission 20 is configured as a stepped transmission that switches gears by engaging / disengaging a plurality of brakes and clutches, and includes an input shaft coupled to the crankshaft of the engine 12 via a torque converter, a gear mechanism 28, and A transmission mechanism including an output shaft coupled to the drive wheels 16a and 16b via a differential gear 29, a plurality of planetary gears, brakes, and clutches is provided. Further, the automatic transmission 20 locks the output shaft so that it cannot rotate when the shift position SP is in the parking position, and the manual valve 22 for setting the hydraulic circuit for operating the brakes and clutches according to the shift position SP. A parking lock mechanism 40 is provided.

  FIG. 2 is a perspective view showing configurations of the electric actuator 60 and the parking lock mechanism 40. As shown in the drawing, the parking lock mechanism 40 includes a parking gear 42 fixed to rotate integrally with the output shaft of the automatic transmission 20, and a parking pole that meshes with the teeth of the parking gear 42 and locks the parking gear 42 so as not to rotate. 44, a parking rod 46 provided with a parking cam (not shown) for pressing the parking pole 44 toward the parking gear 42 and releasing the pressing, a parking shaft 48 that is driven to rotate, and the rotational movement of the parking shaft 48 are parked. A plate member 50 for converting the linear motion of the rod 46 and a detent mechanism 54 for stopping the plate member 50 at a position corresponding to the parking lock and the release thereof are provided. The plate member 50 is fixed to the parking shaft 48, and the base end of the parking rod 46 is attached at a position deviated from the rotation center of the parking shaft 48. The plate member 50 rotates integrally with the parking shaft 48 and moves the parking rod 46. The parking gear 42 is moved back and forth in a plane perpendicular to the axial direction of the parking gear 42. The detent mechanism 54 includes a detent spring 56 whose base end is fixed to the case of the automatic transmission 20, and a roller 58 that is rotatably attached to the distal end of the detent spring 56. The roller 58 is an end of the plate member 50. It is press-contacted with the cam surface 52 which consists of the peak part and trough part which were formed in the part.

  In the parking lock mechanism 40 thus configured, when the parking shaft 48 is rotated in the forward direction, the parking rod 46 is pushed toward the parking gear 42 by the rotation of the plate member 50 fixed to the parking shaft 48. Thereby, the parking pawl 44 and the parking gear 42 are engaged with each other, and the parking lock mechanism 40 is maintained in the parking lock state (the state shown in FIG. 2) in which the parking pawl 44 and the parking gear 42 are engaged with each other by the function of the detent mechanism 54. . Further, when the parking shaft 48 is rotated in the reverse direction (the direction of the thick arrow in FIG. 2), the parking rod 46 is separated from the parking gear 42 by the rotation of the plate member 50 fixed to the parking shaft 48 (see FIG. Retracted (in the direction of the thick arrow 2). As a result, the engagement between the parking pole 44 and the parking gear 42 is released, and the parking lock mechanism 40 is maintained in the parking lock released state by the function of the detent mechanism 54.

  The shift-by-wire system 30 includes a first electric actuator 32 that drives the manual valve 22 of the automatic transmission 20, a second electric actuator 60 that drives the parking lock mechanism 40 of the automatic transmission 20, and the electric actuator 32 and the electric actuator 60. SBWECU 36 for controlling The electric actuator 32 includes an electric motor 34 controlled by the SBWECU 36 and a gear mechanism (not shown), and rotates the manual shaft 23 to move the spool of the manual valve 22 to a position corresponding to the shift position SP.

  FIG. 3 is an explanatory diagram for explaining the structure of the electric actuator 60. As shown, the electric actuator 60 includes a case 61, an electric motor 62 such as a three-phase brushless motor controlled by the SBWECU 36, a drive shaft 69 connected to the parking shaft 48, and a rotating shaft 63 of the electric motor 62. A worm (screw gear) 64 fixed to the worm, a worm wheel (helical gear) that rotates in mesh with the worm 64, and a spur gear that rotates in conjunction with the input gear 66. A gear mechanism 65 having an output gear 68, a fan-shaped gear 70 rotatably supported on a drive shaft 69 by a sliding bearing such as a bush, and accessible from a vehicle compartment or an engine room, but not accessed during normal driving operation. So that it can be pulled manually from a point. 61 handle 77 is provided at an end portion of the outer side comprises a rack 76 which meshes with the sector gear 70, the. The gear mechanism 65 has intermediate gears 67a and 67b each having two large and small spur gears between the input gear 66 and the output gear 68, and constitutes a reduction gear train as a whole. In the electric actuator 60 of the embodiment, when the output gear 68 of the gear mechanism 65 is forcibly rotated, the worm 64 on the electric motor 62 side, that is, the rotating shaft 63 can be rotated by the worm wheel of the input gear 66. The efficiency of the worm gear constituted by the worm 64 on the electric motor 62 side and the worm wheel on the input gear 66 side is determined so as to be able to do so.

  In the electric actuator 60 of the embodiment, when the worm 64 and the worm wheel forming a part of the input gear 66 are engaged with each other, the axial direction of the rotating shaft 63 of the electric motor 62 and the arrangement direction of the gears of the gear mechanism 65 coincide with each other. The longitudinal direction of the electric actuator 60 is formed, and the longitudinal direction of the electric actuator 60 and the drive shaft 69 are orthogonal to each other. When such a drive shaft 69 of the electric actuator 60 is connected to the parking shaft 48 of the parking lock mechanism 40, the axial direction of the output shaft to which the parking gear 42 is fixed and the moving surface of the parking rod 46 are orthogonal to each other. The axial direction of the shaft, that is, the longitudinal direction of the automatic transmission 20 and the longitudinal direction of the electric actuator 60 can be matched.

  In the electric actuator 60 of the embodiment, a pin 68 a is fixed to the output gear 68 of the gear mechanism 65 in parallel with the drive shaft 69, and the fan 68 is driven so that the pin 68 a is loosely fitted. A position where the shaft 69 stops rotating when the engagement between the parking pole 44 and the parking gear 42 is released from a position where the rotation of the shaft 69 stops when the parking pole 44 and the parking gear 42 are engaged (hereinafter referred to as a lock position). , Referred to as a lock release position), a circular arc-shaped slit 72 corresponding to a predetermined angle (for example, 120 degrees, etc.) having a sufficient margin from the center angle of the rotation range, that is, the radius of rotation of the pin 68a And a slit 72 having the shape of a fan-shaped arc having a predetermined central angle. Further, the fan-shaped gear 70 has its outer peripheral teeth 73 meshed with the teeth 78 of the rack 76, and the rack 76 is mounted in a state where it is housed inside the case 61 by a guide member and a stopper member (not shown). And stationary at the mounting position. The mounting position of the sector gear 70 is such that when the pin 68a of the output gear 68 is inserted into the slit 72 of the sector gear 70, the pin 68a is one end of the slit 72 on the locking position side when the drive shaft 69 is in the locking position. It was set as the position arranged near. That is, since a sufficient margin is secured in the slit 72 of the sector gear 70 with respect to the rotation range of the drive shaft 69, the mounting position of the sector gear 70 is viewed from the pin 68a when the drive shaft 69 is in the locked position. Thus, a certain amount of space is secured between one end of the slit 72 opposite to the unlocking position, and when the drive shaft 69 is in the unlocking position, the slit opposite to the locking position as viewed from the pin 68a. This is a position where a certain amount of air gap is secured between the other end of 72.

  Next, the operation of the electric actuator 60 of the embodiment configured as described above will be described. In the electric actuator 60 of the embodiment, basically, when the shift position SP becomes the parking position, the SBWECU 36 controls the electric motor 62 to rotate forward, and the drive shaft 69 rotates from the unlocked position to the locked position. The parking shaft 48 connected to the drive shaft 69 rotates in the forward direction, and the parking lock mechanism 40 enters the parking lock state. When the shift position SP changes from the parking position to another position, the SBWECU 36 controls the electric motor 62 to rotate in the reverse direction, and the drive shaft 69 is connected to the drive shaft 69 by rotating from the locked position to the unlocked position. The parking shaft 48 is rotated in the reverse direction, and the parking lock mechanism 40 is released from the parking lock state.

  FIG. 4 is an explanatory view schematically showing the relationship between the slit 72 of the sector gear 70 and the pin 68a of the output gear 68 when the electric motor 62 can operate normally and the drive shaft 69 is rotationally driven by the electric motor 62. It is. When the drive shaft 69 is rotated between the lock position and the unlock position by being rotated by the electric motor 62, the output gear 68 rotates integrally with the drive shaft 69. The pin 68a of the gear 68 also moves. At this time, even if the drive shaft 69 rotates to the lock position, the pin 68a only moves to a position where a certain gap is secured with respect to one end of the slit 72 (see the solid line pin 68a in FIG. 4). Even if the drive shaft 69 rotates to the unlocking position, the pin 68a only moves to a position where a certain gap is secured with respect to the other end of the slit 72 (see the dotted line pin 68a in FIG. 4). For this reason, the pin 68a moves along the slit 72 without engaging with the sector gear 70 at one end or the other end of the slit 72, and the sector gear 70 is stationary at the mounting position without rotating. Accordingly, the rack 76 and the sector gear 70 do not prevent the parking lock and the release of the parking lock by the electric motor 62.

  FIG. 5 is an explanatory diagram schematically showing the relationship between the slit 72 of the sector gear 70 and the pin 68a of the output gear 68 when the electric motor 62 is inoperable and the parking lock is forcibly released by manual operation of the rack 76. It is. When the rack 76 is forcibly pulled toward the outside of the case 61 by manual operation while the drive shaft 69 is in the locked position (see the thick arrow in FIG. 3), the sector gear 70 is released as the rack 76 is pulled. Rotated in the direction. At this time, since the pin 68a and the sector gear 70 are engaged with each other at one end of the slit 72 of the sector gear 70, the output gear 68 to which the pin 68a is fixed rotates integrally with the sector gear 70 in the release direction, and outputs. The input gear 66 also rotates in conjunction with the gear 68, and the electric motor 62 rotates in reverse via the worm gear. Therefore, the parking lock can be released by pulling the rack 76 by manual operation. As a result, even when the electric motor 62 becomes inoperable due to a power failure or a drive circuit abnormality, the parking lock can be forcibly released and the vehicle can be moved.

According to the electric actuator 60 of the embodiment described above, the electric actuator 60 is
The shaft is connected to the parking rod 46 and is rotatably supported by a drive shaft 69 that is driven to rotate by the electric motor 62. The drive shaft 69 is rotated between the lock position and the unlock position by being driven to rotate by the electric motor 62. When driving, the fan-shaped gear 70 that does not rotate integrally with the drive shaft 69 but rotates together with the drive shaft 69 when the drive shaft 69 is rotated in the releasing direction with the drive shaft 69 in the locked position, and the fan-shaped gear 70 are manually operated. And a mechanism using a rack 76 that can rotate in the release direction. Therefore, when the electric motor 62 becomes inoperable without preventing the parking lock and the parking lock from being released by the electric motor 62, the parking lock Release can be made possible. Further, since the reduction gear mechanism 65 is used, a smaller electric motor 62 can be used, and the mountability of the electric actuator 60 on the automatic transmission 20 can be improved. Moreover, since the worm gear is used so that the axial direction of the rotating shaft 63 of the electric motor 62 and the axial direction of the drive shaft 69 are orthogonal to each other, the longitudinal direction of the automatic transmission 20 and the longitudinal direction of the electric actuator 60 are matched. Therefore, the mountability of the electric actuator 60 on the automatic transmission 20 can be further improved.

  In the electric actuator 60 of the embodiment, when the rack 76 is manually operated, the pin 68a of the output gear 68 is engaged with the sector gear 70 at one end of the slit 72, whereby the sector gear 70, the output gear 68, and the drive shaft 69 However, the fan gear and the drive shaft may be integrally rotated in the release direction without using the output gear. For example, a pin may be attached to the drive shaft so as to be parallel to the axial direction, and the pin of the drive shaft may be engaged with the sector gear 70 at one end of the slit 72.

  In the electric actuator 60 of the embodiment, the output gear 68 is provided with the pin 68a and the sector gear 70 is provided with the slit 72. On the contrary, the output gear is provided with the slit and the sector gear is provided with the pin. It is good.

  In the electric actuator 60 of the embodiment, when the rack 76 is manually operated, the teeth 78 of the rack 76 and the teeth 73 of the sector gear 70 mesh with each other, so that the sector gear 70 rotates in the release direction. Instead of the combination of the fan-shaped gear 70 and the fan-shaped gear 70, the fan-shaped gear may be rotated in the releasing direction by a gear mechanism or a link mechanism other than the rack and pinion.

  In the electric actuator 60 of the embodiment, the electric motor 62 rotationally drives the drive shaft 69 via the gear mechanism 65, but without the gear mechanism 65, the rotating shaft 63 of the electric motor 62 is driven by the drive shaft 69. It is good also as what is directly fixed to.

  In the electric actuator 60 of the embodiment, the fan-shaped fan gear 70 in which the arc-shaped slit 72 is formed is used. However, instead of this, a circular gear in which the arc-shaped slit is formed may be used. Good.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the electric motor 62 corresponds to the “electric motor”, the drive shaft 69 corresponds to the “drive shaft”, the sector gear 70 corresponds to the “rotating member”, the teeth 73 on the outer periphery of the sector gear 70 and the rack 76. Is a “manual rotation mechanism”. The gear mechanism 65 having the input gear 66 and the output gear 68 corresponds to a “gear mechanism”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the transmission industry and the like.

  10 automobiles, 12 engines, 14 engine electronic control units (engine ECU), 16a, 16b drive wheels, 20 automatic transmissions, 22 manual valves, 23 manual shafts, 26 automatic transmission electronic control units (ATECU), 28 gear mechanisms, 29 differential gear, 30 shift-by-wire system, 32 electric actuator, 34 electric motor, 36 electronic control unit (SBWECU) for shift-by-wire system, 40 parking lock mechanism, 42 parking gear, 44 parking pole, 46 parking rod, 48 parking shaft, 50 plate member, 52 cam surface, 54 detent mechanism, 56 detent spring, 58 roller, 60 Dynamic Actuator, 61 Case, 62 Electric Motor, 63 Rotating Shaft, 64 Worm, 65 Gear Mechanism, 66 Input Gear, 67a, 67b Intermediate Gear, 68 Output Gear, 68a Pin, 70 Fan Gear, 72 Slit, 73 Teeth, 76 Racks , 77 handle, 78 teeth, 80 main electronic control unit (main ECU), 81 ignition switch, 82 shift position sensor, 84 accelerator pedal position sensor, 86 brake pedal position sensor, 88 vehicle speed sensor.

Claims (6)

A parking lock electric actuator for moving a parking rod for engaging and disengaging a parking pole and a parking gear of a parking lock mechanism,
An electric motor,
A lock position, which is connected to the parking rod and is driven to rotate by the electric motor to engage the parking pawl and the parking gear, is disengaged from the locked position and the parking pawl and the parking gear. A drive shaft that rotates between a lock release position that is a rotation stop position when
When the drive shaft is rotatably supported by the drive shaft and is driven to rotate by the electric motor so that the drive shaft rotates between the lock position and the unlock position, the drive shaft does not rotate integrally with the drive shaft. A rotating member that rotates integrally with the drive shaft when the shaft is rotated in a predetermined direction with the shaft in the locked position;
A manual rotation mechanism that allows the rotation member to rotate in the one direction by manual operation;
An electric actuator for parking lock comprising: The electric actuator for parking lock according to claim 1,
A gear mechanism including an input gear meshing with a gear fixed to a rotating shaft of the electric motor, and an output gear fixed to the drive shaft and rotating in conjunction with the input gear;
The rotating member does not engage with the output gear of the gear mechanism when the drive shaft is rotated by the electric motor and rotates between the lock position and the unlock position, and the drive shaft is not locked. A member that engages with an output gear of the gear mechanism and rotates integrally with the output gear when rotated in the one direction in a position;
Electric actuator for parking lock. The electric actuator for parking lock according to claim 2,
One of the rotating member and the output gear of the gear mechanism is formed with an arc-shaped slit having a circumference corresponding to a central angle of a rotation range of the drive shaft from the locked position to the unlocked position. A pin loosely fitted in the slit is fixed to the other of the rotating member and the output gear of the gear mechanism,
Electric actuator for parking lock. The electric actuator for parking lock according to claim 2 or 3,
The manual rotation mechanism includes a gear portion formed on the outer periphery of the rotation member, and a rack that meshes with the gear portion.
Electric actuator for parking lock. The electric actuator for parking lock according to any one of claims 2 to 4,
The electric motor is arranged so that an axial direction of the rotating shaft and an axial direction of the drive shaft are orthogonal to each other.
Electric actuator for parking lock. The electric actuator for parking lock according to claim 5,
The gear fixed to the rotating shaft of the electric motor is a worm,
The input gear of the gear mechanism includes a worm wheel that constitutes the worm and the worm gear.
Electric actuator for parking lock.