JP2012144110A - Park lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a park lock structure that controls an impact occurring in meshing between gear parts of a gear member and a locking part of a locking member.SOLUTION: The park lock structure 1 includes a rotary shaft 3 that is ratatably disposed, the gear member 5 disposed so as to be rotatable integrally with the rotary shaft 3, and the locking member 11 including the locking part 9 for meshing with the gear parts 7 of the gear member 5 to prevent the rotary shaft 3 from being rotated, and a tooth apex surface of the locking part 9 in a direction meshing with the gear parts 7 is provided with a retreating surface 15 retreating toward both end sides in a tooth width direction from a top part 13 in the meshing direction.

Description

  The present invention relates to a park lock structure applied to a vehicle.

  Conventionally, the park lock structure includes an idle shaft as a rotating shaft that is rotatably arranged, a parking gear as a gear member that is provided so as to be integrally rotatable with the idle shaft, and an idle that meshes with a gear portion of the parking gear. One having a parking pole as a lock member provided with a lock portion for preventing rotation of the shaft is known (for example, see Patent Document 1).

  In this park lock structure, a parking pawl lock portion is meshed with a gear portion of a parking gear provided so as to be rotatable integrally with the idle shaft, thereby preventing the idle shaft from rotating and allowing the parked vehicle to self-run. Is preventing.

Japanese Patent Laid-Open No. 10-230825

  By the way, in the park lock structure as described above, the gear portion of the gear member and the lock portion of the lock member are engaged with each other when the gear member rotates at a low speed as when the vehicle is parked. In addition, when the rotation of the gear member is such that the vehicle normally travels, the tooth crest surface in the meshing direction of the lock part is repelled by the outer diameter of the gear part, so that the gear part and the lock part mesh with each other. The vehicle cannot be suddenly stopped from the normal travel time. For this reason, the tooth crest surface in the meshing direction of the lock portion of the lock member that contacts the outer diameter of the gear portion of the gear member is a flat surface.

  However, when the tooth crest surface of the lock portion is flat, the gear crest surface of the lock portion is not geared when the gear member rotates at a relatively high speed, such as when the vehicle starts or before stopping. There is a risk that the end portion in the tooth width direction of the crest surface of the lock portion enters between adjacent gear portions without being repelled by the outer diameter of the lock portion, and the gear portion and the lock portion are engaged with each other.

  If the gear part and the lock part mesh with each other when the gear member rotates at a relatively large speed, the end of the gear part and the lock part in the tooth width direction when the gear part and the lock part mesh with each other. A large impact is generated by the collision with the end.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a park lock structure capable of suppressing an impact in meshing between a gear portion of a gear member and a lock portion of a lock member.

  The present invention is provided with a rotation shaft that is rotatably arranged, a gear member that is provided so as to be rotatable integrally with the rotation shaft, and a lock portion that engages with a gear portion of the gear member and prevents rotation of the rotation shaft. And a lock-back structure including a lock member, wherein the lock portion has a tooth crest surface in a meshing direction with the gear portion, and a receding surface retreating from the top portion in the meshing direction toward both ends in the tooth width direction. Is provided.

  In this parking lock structure, since the tooth crest surface in the meshing direction with the gear portion of the lock portion is provided with a receding surface that recedes from the top in the meshing direction toward both ends in the tooth width direction, the end of the gear portion Rotation of the gear member that greatly reduces the chance that the end of the gear portion and the end of the lock portion in the tooth width direction collide with each other, and the engagement between the gear portion and the lock portion begins. The speed can be reduced. For this reason, when the rotation of the gear member is at a relatively high speed, the lock member is repelled on the opposite side of the meshing direction by the contact between the outer diameter of the gear unit and the receding surface, and the meshing between the gear unit and the lock unit is performed. Can be suppressed.

  Therefore, in such a park lock structure, the rotation speed of the gear member where the engagement between the gear portion and the lock portion begins can be reduced, so that the impact in the engagement between the gear portion of the gear member and the lock portion of the lock member is reduced. Can be suppressed.

  Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to provide a park lock structure capable of suppressing an impact in meshing between a gear portion of a gear member and a lock portion of a lock member.

It is a side view of the park lock structure which concerns on embodiment of this invention. It is sectional drawing of the park lock structure which concerns on embodiment of this invention. It is a perspective view of the member accommodated in the casing of the park lock structure which concerns on embodiment of this invention. It is an enlarged view of the park lock structure which concerns on embodiment of this invention. It is an enlarged view of the lock part of the park lock structure which concerns on embodiment of this invention. It is an enlarged view which shows the other examples of the lock part of the park lock structure which concerns on embodiment of this invention. (A) is an enlarged view which shows the other example of the lock | rock part shown in FIG. FIG. 7B is an enlarged view showing another example of the lock portion shown in FIG. 6.

  A park lock structure according to an embodiment of the present invention will be described with reference to FIGS.

  The park lock structure 1 according to the present embodiment meshes with a rotating shaft 3 that is rotatably arranged, a gear member 5 that is provided so as to be integrally rotatable with the rotating shaft 3, and a gear portion 7 of the gear member 5. And a lock member 11 provided with a lock portion 9 that prevents rotation of the rotary shaft 3.

  The tooth crest surface in the meshing direction with the gear portion 7 of the lock portion 9 is provided with a receding surface 15 that recedes from the top portion 13 in the meshing direction toward both ends in the tooth width direction.

  The receding surface 15 includes a first receding surface 17 and a second receding surface 19 that recede from the top 13 in the meshing direction toward both ends in the tooth width direction.

  Further, the first receding surface 17 and the second receding surface 19 are set to a plane that recedes by a predetermined angle θ from the vertical surface 21 at the top 13 with respect to the meshing direction in which the lock member 11 operates.

  The lower limit of the predetermined angle θ is set such that the end portions 23 and 25 of the gear portion 7 and the top portion 13 can be separated when the receding surface 15 and the end portions 23 and 25 of the gear portion 7 abut. The upper limit is set to an angle at which the lock portion 9 maintains the tooth height of the lock portion 9 that can prevent the rotation of the rotary shaft 3 via the gear portion 7 when the gear portion 7 and the lock portion 9 are engaged with each other. .

  Further, the receding surface 15 and both end portions in the tooth width direction are connected by end surface curved surfaces 27 and 29.

  As shown in FIGS. 1 to 3, the park lock structure 1 includes a casing 31, an operation mechanism 33, a rotating shaft 3, a gear member 5, and a lock member 11.

  As shown in FIGS. 1 and 2, the casing 31 accommodates the operation mechanism 33, the rotating shaft 3, the gear member 5, and the lock member 11 therein. A cover 37 is assembled to the opening surface 35 of the casing 31, and each member is accommodated in the casing 31 and then closed by the cover 37.

  As shown in FIGS. 1 to 3, the operation mechanism 33 includes an actuator 39, a motor shaft 41, a rotating member 43, a moving mechanism 45, and an urging member 47. The actuator 39 is composed of an electric motor and is attached to the outside of the casing 31. The actuator 39 is actuated when a user such as a driver switches the shift range, and rotates the motor shaft 41.

  The motor shaft 41 is provided so as to be rotatable together with the actuator 39, and is accommodated in the casing 31 so as to be rotatable. A rotating member 43 is provided on the motor shaft 41 so as to be integrally rotatable.

  The rotating member 43 is made of a thin plate and rotates around the axis of the motor shaft 41 by the rotation of the motor shaft 41. The rotation member 43 releases the lock position where the lock member 11 prevents the rotation of the rotation shaft 3 and the prevention of rotation of the rotation shaft 3 by the lock member 11 by forward and reverse rotation of the motor shaft 41, that is, the actuator 39. It is rotated between the unlocked position. The rotation of the rotating member 43 is transmitted to the moving mechanism 45.

  The moving mechanism 45 includes a moving member 49 and an operation member 51. The moving member 49 is formed of a long rod, and one end side is engaged with the rotating member 43 via the connecting portion 53, and is moved in the axial direction by the rotation of the rotating member 43. An operation member 51 is provided on the other end side of the moving member 49.

  The operation member 51 includes a shaft portion 55 and an operation portion 57. The shaft portion 55 engages with a hole 61 formed in the end wall of the cylindrical holding portion 59 fixed inside the casing 31, and the movement of the operation portion 57 is guided. The operation portion 57 is held inside the cylindrical holding portion 59 so as to be movable in the axial direction, and a cam surface 63 that contacts the lock member 11 and operates the lock member 11 is formed. Further, a spring 65 serving as a waiting mechanism for the lock member 11 is disposed between the operation unit 57 and the moving member 49 when the lock member 11 prevents the rotation shaft 3 from rotating. The operation member 51 operates the lock member 11 by moving the cam surface 63 of the operation unit 57 in contact with the lock member 11 or releasing the contact by axial movement.

  The urging member 47 is formed of a leaf spring, and one end is engaged with the cylindrical holding portion 59 and is fixed to the casing 31 with a bolt, and the other end is engaged with the rotating member 43. The other end of the urging member 47 is an engaging portion 67 made of a roller, and the rotation of the rotation member 43 causes a gap between the lock recess 69 and the release recess 71 formed in the rotation member 43. Fluctuate and engage one of them. Specifically, the engaging portion 67 is engaged with the lock recess 69 when the rotating member 43 is positioned at the lock position, and is engaged with the release recess 71 when the rotating member 43 is positioned at the lock release position. The At this time, the urging member 47 applies an urging force to the rotating member 43 in two stages of the lock position and the lock release position.

  In such an operation mechanism 33, the rotation member 43 is rotated by the operation of the actuator 39, the lock member 11 is operated via the movement mechanism 45, and the gear portion 7 of the gear member 5 and the lock portion 9 of the lock member 11 are operated. Is prevented from rotating.

  The rotating shaft 3 is an output shaft or an input shaft of a speed change mechanism (not shown) provided on a power transmission path from the drive source to the wheels. A gear member 5 is provided on the rotary shaft 3 so as to be integrally rotatable. When the gear portion 7 of the gear member 5 meshes with the lock portion 9 of the lock member 11, the rotation shaft 3 is prevented from rotating, and the transmission of the driving force from the drive source to the wheels is prevented. When the meshing between the gear portion 7 and the lock portion 9 is released, the rotation of the rotating shaft 3 is released and the driving force can be transmitted from the driving source to the wheels.

  The gear member 5 is fixed so that the inner diameter side can rotate integrally with the rotary shaft 3, and the outer diameter side is a gear portion 7 composed of a plurality of teeth. The gear portion 7 of the gear member 5 can be engaged with the lock portion 9 of the lock member 11. When the gear portion 7 and the lock portion 9 are engaged with each other, the rotation of the rotating shaft 3 provided so as to be integrally rotatable with the gear member 5 is prevented.

  The lock member 11 is assembled to an assembly surface 77 that is the bottom surface of the recess 75 of the lock holding portion 73 provided on the opposite side of the opening surface 35 from the opening surface 35 of the casing 31. It has. The contact portion 79 is provided on one end side and is disposed inside the cylindrical holding portion 59 at the unlocked position of the rotating member 43, and the cam surface 63 of the operation portion 57 is at the locked position of the rotating member 43. The lock member 11 is brought into contact with the rotary shaft 3 in a direction that prevents the rotation shaft 3 from rotating. The lock portion 9 is provided on the other end side, and the gear portion of the gear member 5 provided so as to be integrally rotatable with the rotary shaft 3 when the lock member 11 is rotated in a direction to prevent the rotary shaft 3 from rotating. 7, and the rotation of the rotating shaft 3 is prevented. The lock member 11 is pivotally supported by the shaft support member 81 so as to be swingable.

  One end of the shaft support member 81 is inserted into the casing 31 through the lock member 11 and fixed, and the other end is pressed into the cover 37 and fixed. Thereby, the shaft support member 81 supports the lock member 11 so as to be swingable. A restricting portion 83 formed in an annular shape having a larger diameter than the diameter of the shaft support member 81 is provided at a central portion of the shaft support member 81 as one member continuous with the shaft support member 81. The restricting portion 83 restricts the lock member 11 from moving from the assembly surface 77 toward the opening surface 35 via an elastic member 85 disposed between the restricting portion 83 and the lock member 11. .

  The elastic member 85 includes a winding spring, is assembled to the shaft support member 81 between the restriction portion 83 and the lock member 11, one end is engaged with the casing 31, and the other end is in contact with the lock member 11. . The elastic member 85 urges the lock member 11 in the direction in which the lock portion 9 and the gear portion 7 of the gear member 5 are disengaged to define the initial position of the lock member 11. The urging force of the elastic member 85 is set to be weaker than the spring 65 provided in the operation mechanism 33. By rotation of the lock member 11 whose initial position is defined by such an elastic member 85, the rotation of the rotating shaft 3 is prevented or the prevention of rotation is released.

  In the park lock structure 1 configured as described above, when the rotation member 43 is rotated to the lock position by the operation of the actuator 39, the moving member 49 is moved to the lock member 11 side, and the operation portion 57 of the operation member 51 is moved. It contacts the contact portion 79 of the lock member 11. At this time, the cam surface 63 formed on the operation portion 57 of the operation member 51 presses the contact portion 79 of the lock member 11, and the contact portion 79 side of the lock member 11 resists the biasing force of the elastic member 85. Press. As a result, as shown by the solid line in FIG. 1, the lock portion 9 of the lock member 11 is pushed up with the shaft support member 81 as a fulcrum, and meshes with the gear portion 7 of the gear member 5, thereby preventing the rotation shaft 3 from rotating. When the lock portion 9 is positioned on the tooth surface of the gear portion 7 and is not engaged with the gear portion 7, the lock portion 9 is urged toward the tooth bottom of the gear portion 7 by a spring 65 as a waiting mechanism. When the lock portion 9 is located at the meshing position with the gear portion 7, the mesh portion meshes with the gear portion 7.

  When the rotation member 43 is rotated to the unlocked position by the operation of the actuator 39 from the locked state of the lock member 11, that is, from the meshed state of the gear portion 7 and the lock portion 9, the moving member 49 is moved to the rotation member 43 side. The contact between the operation portion 57 of the operation member 51 and the contact portion 79 of the lock member 11 is released. At this time, the contact portion 79 of the lock member 11 is raised by the urging force of the elastic member 85 and is accommodated in the cylindrical holding portion 59. As a result, as indicated by the imaginary line in FIG. 1, the lock portion 9 of the lock member 11 is lowered with the shaft support member 81 as a fulcrum, and the meshing with the gear portion 7 of the gear member 5 is released. This block is released.

  In the meshing between the gear portion 7 of the gear member 5 and the lock portion 9 of the lock member 11, the rotation of the rotating shaft 3, that is, the rotation of the gear member 5 as compared with when the vehicle starts or before stopping is compared. When the speed is relatively large, the crest surface of the lock portion 9 is not repelled by the outer diameter of the gear portion 7 and the end portion in the tooth width direction of the crest surface of the lock portion 9 enters between the adjacent gear portions 7 and 7. The gear part 7 and the lock part 9 may be engaged with each other. If the gear portion 7 and the lock portion 9 are engaged when the rotation of the gear member 5 is at a relatively large speed, the end portion 23 of the gear portion 7 when the gear portion 7 and the lock portion 9 are engaged, A large impact is generated by the collision between the end portion 25 of the lock portion 9 and the end portion of the lock portion 9 in the tooth width direction. In order to suppress the occurrence of such a large impact, a receding surface 15 is provided on the crest surface of the lock portion 9.

  As shown in FIGS. 4 and 5, the receding surface 15 is located on the side of the both ends 87 and 89 in the tooth width direction from the top portion 13 in the meshing direction on the tooth top surface in the meshing direction indicated by the arrow in FIG. It consists of the 1st receding surface 17 and the 2nd receding surface 19 which recede toward. Further, the first and second receding surfaces 17 and 19 and the both end surfaces 87 and 89 in the tooth width direction are connected by end curved surfaces 27 and 29. The end curved surfaces 27 and 29 alleviate an impact caused by a collision with the end portions 23 and 25 of the gear portion 7 when the gear portion 7 and the lock portion 9 are engaged with each other. The first receding surface 17 and the second receding surface 19 are set to a plane that recedes by a predetermined angle θ from the vertical surface 21 at the top 13 with respect to the meshing direction in which the lock member 11 operates. The predetermined angle θ is set by a technical configuration within the range described later, but numerically, θ is suitably 5 ° or more and 15 ° or less, and preferably 8 ° to 12 °. .

  Here, the predetermined angle θ between the first receding surface 17, the second receding surface 19, and the vertical surface 21 has a minimum required lower limit, and the receding surfaces 17, 19 and the end portion 23 of the gear portion 7. , 25 is set to an angle at which the end portions 23, 25 of the gear portion 7 and the top portion 13 can be separated from each other. Here, when the receding surface 15 is not provided on the tooth top surface, the entire surface of the tooth top surface is the top portion 13, and both end portions (end curved surfaces 27 and 29 of the tooth top surface in the tooth width direction are provided. The chance that the portion) collides with the end portions 23 and 25 of the gear portion 7 is increased. Therefore, the lower limit of the predetermined angle θ is set to an angle at which the end portions 23 and 25 of the gear portion 7 and the top portion 13 can be separated when the receding surfaces 17 and 19 and the end portions 23 and 25 of the gear portion 7 abut. By setting, the chance that both end portions of the tooth crest surface in the tooth width direction collide with the end portions 23 and 25 of the gear portion 7 can be greatly reduced.

  In addition, the predetermined angle θ between the first receding surface 17, the second receding surface 19 and the vertical surface 21 has an upper limit of when the gear portion 7 and the lock portion 9 are engaged with each other. Is set to an angle that maintains the tooth height of the lock portion 9 that can prevent the rotation of the rotary shaft 3 through the shaft. This is because when the gear portion 7 and the lock portion 9 are engaged with each other, the both end surfaces 87 and 89 of the lock portion 9 in the tooth width direction and the both end surfaces 91 and 93 of the gear portion 7 in the tooth width direction are surely brought into contact with each other. The possible range is shown. For this reason, when the gear part 7 and the lock part 9 mesh with the upper limit of the predetermined angle θ, the lock part 9 maintains the tooth height of the lock part 9 that can prevent the rotation shaft 3 from rotating via the gear part 7. By setting the angle, the engagement between the gear portion 7 and the lock portion 9 is ensured while greatly reducing the chance that both end portions of the tooth crest surface collide with the end portions 23 and 25 of the gear portion 7. Can be held.

  In such a park lock structure 1, a receding surface 15 that recedes from the top portion 13 in the meshing direction toward both ends in the tooth width direction is provided on the tooth crest surface in the meshing direction with the gear portion 7 of the lock portion 9. Therefore, when the end portions 23 and 25 of the gear portion 7 and the receding surface 15 come into contact with each other, the chance that the end portions 23 and 25 of the gear portion 7 collide with the end portion in the tooth width direction of the lock portion 9 is greatly increased. It is possible to decrease the rotational speed of the gear member 5 where the engagement between the gear portion 7 and the lock portion 9 starts. For this reason, when the rotation of the gear member 5 is at a relatively high speed, the lock member 11 is repelled on the opposite side of the meshing direction by the contact between the outer diameter of the gear portion 7 and the receding surface 15. Engagement with the lock portion 9 can be suppressed.

  Accordingly, in such a park lock structure 1, the rotation speed of the gear member 5 at which the engagement between the gear portion 7 and the lock portion 9 starts can be reduced, so that the lock between the gear portion 7 of the gear member 5 and the lock member 11 can be achieved. The impact in meshing with the portion 9 can be suppressed.

  Further, the receding surface 15 is composed of the first receding surface 17 and the second receding surface 19 that recede from the top portion 13 in the meshing direction toward both end sides in the tooth width direction. It is possible to cope with the rotation, and the impact in the meshing between the gear portion 7 and the lock portion 9 can be suppressed in both the forward and reverse traveling states of the vehicle.

  Furthermore, the first receding surface 17 and the second receding surface 19 are set to a plane that recedes by a predetermined angle θ from the vertical surface 21 at the top 13 with respect to the meshing direction in which the lock member 11 operates. It is possible to cope with an increase / decrease in the rotational speed of the gear member 5 by changing.

  The lower limit of the predetermined angle θ is set such that the end portions 23 and 25 of the gear portion 7 and the top portion 13 can be separated when the receding surface 15 and the end portions 23 and 25 of the gear portion 7 abut. The upper limit is set to an angle at which the lock portion 9 maintains the tooth height of the lock portion 9 that can prevent the rotation of the rotary shaft 3 via the gear portion 7 when the gear portion 7 and the lock portion 9 are engaged with each other. .

  Therefore, the engagement between the gear portion 7 and the lock portion 9 is ensured while greatly reducing the chance that both end portions in the tooth width direction of the tooth crest surface of the lock portion 9 collide with the end portions 23 and 25 of the gear portion 7. Can be held.

  Further, since the receding surface 15 and both end portions in the tooth width direction are connected by end curved surfaces 27 and 29, the end curved surfaces 27 and 29 of the lock portion 9 and the end portions 23 and 25 of the gear portion 7 are connected. The impact caused by the collision can be reduced.

  The receding surface provided on the tooth crest surface of the lock portion 9 may be a receding surface 15a made of one curved surface as shown in FIG. In FIG. 6, the first and second receding surfaces 15 b and 15 c are set in which the top portion 13 a is located at the central portion in the tooth width direction, has one curvature, and the distance from the vertical surface 21 is similarly set on both ends. Has been. The receding surfaces 15b and 15c can alleviate the impact of the collision. Even with such a retreating surface 15a, the retreating surface 15a retreats toward both ends (end surface curved surfaces 27 and 29) in the tooth width direction from the top portion 13 in the meshing direction, so that the end portions 23 and 25 of the gear portion 7 and the lock portion The chance of collision with the end portion in the tooth width direction of 9 is greatly reduced, and the rotational speed of the gear member 5 at which the engagement between the gear portion 7 and the lock portion 9 starts can be reduced.

  Further, the apex portion of the tooth crest surface of the lock portion 9 may be a crest portion 13a provided so as to be biased toward one of the end curved surfaces 27 and 29 (here, the end curved surface 29) as shown in FIG. . This top portion 13a is, for example, a retreat surface 17, 15a side where the end portion 25 of the gear portion 7 abuts when the vehicle travels forward, and a retreat surface where the end portion 23 of the gear portion 7 abuts when the vehicle travels backward. 19 and 15a are positioned so as to be wider than the side. By changing the position of the top portion 13a in this way, the receding surfaces 15 and 15a side having a higher rate of contact with the end portions 23 and 25 of the gear portion 7 can be set wider.

  Specifically, FIG. 7A shows the flat receding surfaces 17 and 19, and FIG. 7B shows the curved receding surface 15a. In FIG. 7A, the top portion 13a is provided in a biased manner, and the angles formed by the receding surfaces 17 and 19 from the vertical surface 21 are set to be different. In FIG. 7 (b), the top portion 13a is provided in a biased manner, the first and second retractions are set so that the top portion 13a has different curvatures in the tooth width direction and the distance from the vertical surface 21 is different on both end sides. Surfaces 15b and 15c are set. The receding surfaces 15b and 15c can alleviate the impact of the collision.

  In the park lock structure according to the embodiment of the present invention, the receding surface is provided on the crest surface of the lock portion of the lock member. However, the present invention is not limited thereto, and the receding surface is provided on the crest surface of the gear portion of the gear member. May be provided.

DESCRIPTION OF SYMBOLS 1 ... Park lock structure 3 ... Rotating shaft 5 ... Gear member 7 ... Gear part 9 ... Lock part 11 ... Lock member 13, 13a ... Top part 15, 15a ... Retraction surface 17, 15b ... 1st retraction surface 19, 15c ... 1st 2 receding surfaces 21... Vertical surface .theta.... Predetermined angle 23, 25.

Claims (6)

A rotary shaft arranged rotatably, a gear member provided so as to be rotatable integrally with the rotary shaft, and a lock member provided with a lock portion that meshes with a gear portion of the gear member and prevents rotation of the rotary shaft. A parking lock structure with
A parking lock structure, wherein a receding surface is provided on a tooth crest surface of the lock portion in a meshing direction with the gear portion so as to recede from the crest portion in the meshing direction toward both ends in the tooth width direction. The park lock structure according to claim 1,
The park lock structure characterized in that the receding surface and both end portions in the tooth width direction are connected by curved end portions. The park lock structure according to claim 1 or 2,
The park lock structure is characterized in that the receding surface includes a first receding surface and a second receding surface that recede from the top in the meshing direction toward both ends in the tooth width direction. The parking lock structure according to claim 3,
The park lock structure, wherein the first receding surface and the second receding surface are set to a plane that recedes by a predetermined angle from a vertical surface at the top with respect to a meshing direction in which the lock member operates. The park lock structure according to claim 4,
The predetermined angle is set such that the lower limit is an angle at which the end of the gear part and the top part can be separated when the receding surface and the end of the gear part abut, and the upper limit is the gear part and the A park lock structure in which the lock portion is set at an angle that maintains the tooth height of the lock portion capable of preventing rotation of the rotating shaft via the gear portion when the lock portion is engaged with the lock portion. . The parking lock structure according to claim 3,
The park lock structure, wherein the first receding surface and the second receding surface are set to be curved surfaces.

Images