JP2012241731A - Parking lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parking lock structure which prevents a pivoting member from coming off without increasing parts count.SOLUTION: A parking lock structure 1 comprises a casing 3, a lock member 5 which is rockingly accommodated in and supported by the casing 3, a pivoting member 7 which is inserted into the lock member 5 and assembled in the casing 3 to pivotally support the lock member 5, a drive shaft 9 which is accommodated in the casing 3 to prevent rotation or release the lock of the rotation by rocking the lock member 5, and a mating case 13 assembled in an opening surface 11 of the casing 3. The mating case 13 is provided with a projecting part 15 projecting toward the pivoting member 7, while being assembled in the casing 3.

Description

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

  Conventionally, the park lock structure includes a case main body as a casing, a parking pole as a lock member that is swingably received and supported by the case main body, and a parking pole that is inserted into the parking pole and assembled to the case main body. As a parking pole shaft as a pivoting support member, an output gear housed in the case body and prevented from rotating or unblocked by swinging of the parking pole, and a counterpart case assembled to the opening surface of the case body What is provided with the side cover of this is known (for example, refer patent document 1).

  In this park lock structure, the parking pole shaft is screwed into the case body, and a plate member fixed with a bolt is disposed at the end of the parking pole shaft on the opening surface side of the case body. The plate member prevents the parking pole shaft from coming off from the case body.

JP 2003-106453 A

  However, in the park lock structure as described above, since the shaft support member is prevented from being removed using another member such as a plate member, the number of parts has been increased.

  Accordingly, an object of the present invention is to provide a park lock structure capable of preventing the shaft support member from coming off without increasing the number of parts.

  The present invention includes a casing, a lock member that is housed and supported by the casing so as to be swingable, a shaft support member that is inserted into the lock member and is assembled to the casing and pivotally supports the lock member, and is housed in the casing. And a parking lock structure comprising a drive shaft whose rotation is blocked or unblocked by swinging of the lock member, and a mating case assembled to the opening surface of the casing, A protruding portion that protrudes toward the shaft support member in a state assembled to the casing is provided.

  In this park lock structure, since a protruding portion that protrudes toward the pivot support member is provided in a state where the counterpart case is assembled to the casing, the protruding portion is arranged to face the pivot support member by assembling the counterpart case to the casing. It is possible to prevent the shaft support member from coming off.

  Therefore, in such a park lock structure, the shaft support member can be prevented from coming off without increasing the number of parts.

  According to the present invention, there is an effect that it is possible to provide a park lock structure capable of preventing the shaft support member from coming off without increasing the number of parts.

It is a side view of the casing side 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 side view by the side of the other party of the park lock structure which concerns on embodiment of this invention.

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

  The park lock structure 1 according to the present embodiment includes a casing 3, a lock member 5 housed and supported by the casing 3 so as to be swingable, and the lock member 5 inserted into the lock member 5 and assembled to the casing 3. A shaft support member 7 that supports the shaft, a drive shaft 9 that is housed in the casing 3 and whose rotation is blocked or released by the rocking of the lock member 5, and a mating case 13 that is assembled to the opening surface 11 of the casing 3 It has.

  The counterpart case 13 is provided with a protruding portion 15 that protrudes toward the shaft support member 7 in a state assembled to the casing 3.

  The protrusion 15 is a rib that is provided at the center of the wall surface 17 of the counterpart case 13 and reinforces the wall surface 17.

  As shown in FIGS. 1 to 3, the park lock structure 1 includes an operation mechanism 19, a casing 3, a lock member 5, a shaft support member 7, a gear member 21, a drive shaft 9, and a counterpart case 13. It has.

  As shown in FIGS. 1 and 2, the operation mechanism 19 includes a moving member 23 and an operation member 25. The moving member 23 is composed of a long rod, one end of which is connected to an actuator (not shown) that is operated by a user such as a driver switching the shift range, and is moved in the axial direction by the operation of the actuator. The operating member 25 is inserted into the other end side of the moving member 23, and the axial position of the operating member 25 relative to the moving member 23 is positioned by a welded portion 27 formed by welding the end portion.

  The operation member 25 is held in a sleeve 31 fixed to the casing 3 by bolts 29 so as to be movable in the axial direction. The operation member 25 is formed with a cam surface 33 that is exposed from the inside of the sleeve 31 to the outside and contacts the lock member 5 to operate the lock member 5. The operating member 25 is in contact with a waiting spring 35 that is inserted into the moving member 23 and serves as a waiting mechanism for the locking member 5 when the locking member 5 prevents the drive shaft 9 from rotating. The operation member 25 operates the lock member 5 when the cam surface 33 comes into contact with the lock member 5 or releases the contact by the movement of the moving member 23 in the axial direction.

  Such an operation mechanism 19 is housed in the casing 3 together with the lock member 5, the gear member 21, and the like, and operates to swing the lock member 5 to prevent the drive shaft 9 from rotating or to prevent the drive shaft 9 from rotating. Is released.

  As shown in FIGS. 1 and 2, the casing 3 accommodates an operation mechanism 19, a lock member 5, a gear member 21, a drive shaft 9, and the like. A mating case 13, which will be described later, is assembled to the opening surface 11 of the casing 3, and each member is accommodated in the casing 3, and then closed by the mating case 13.

  The lock member 5 is assembled to a groove-shaped assembly portion 37 provided on the inner side of the opening surface 11 of the casing 3, and includes a contact portion 39 and a lock portion 41. The contact portion 39 is provided on one end side of the lock member 5, and is disposed inside the sleeve 31 at the unlocked position of the lock member 5, and the cam surface 33 of the operation member 25 is abutted at the lock position of the lock member 5. The lock member 5 is contacted and rotated in a direction to prevent the drive shaft 9 from rotating.

  The lock portion 41 is provided on the other end side of the lock member 5, and is a gear member provided so as to rotate integrally with the drive shaft 9 when the lock member 5 is rotated in a direction that prevents the drive shaft 9 from rotating. 21 meshes with the gear portion 43 of the motor 21 and prevents the drive shaft 9 from rotating. The lock member 5 is pivotally supported by the shaft support member 7 so as to be swingable.

  The shaft support member 7 is inserted through the assembly portion 37 of the casing 3 and the lock member 5, and one end side (the assembly portion 37 side) is fixed to the casing 3. The lock member 5 is swingably supported by the shaft support member 7. A return spring 45 is inserted into the other end side of the shaft support member 7.

  The return spring 45 is a winding spring, and one end is engaged with the casing 3 and the other end is in contact with the lock member 5. The return spring 45 urges the lock member 5 in the direction in which the lock portion 41 and the gear portion 43 of the gear member 21 are disengaged to define the initial position of the lock member 5. The urging force of the return spring 45 is set to be weaker than the waiting spring 35 provided in the operation mechanism 19.

  The gear member 21 is fixed so that the inner diameter side can rotate integrally with the drive shaft 9, and the outer diameter side is a gear portion 43 including a plurality of teeth. The gear portion 43 of the gear member 21 can be engaged with the lock portion 41 of the lock member 5. When the gear portion 43 and the lock portion 41 are engaged with each other, the rotation of the drive shaft 9 provided to rotate integrally with the gear member 21 is prevented.

  The drive shaft 9 is rotatably supported by the casing 3 and the counterpart case 13 via bearings 47 and 49, and is an output shaft of a speed change mechanism (not shown) provided on a power transmission path from the drive source to the wheels. It is an input shaft. The drive shaft 9 is provided with a large-diameter gear 51 and a small-diameter gear 53, which are input / output gears, so as to be integrally rotatable.

  The drive shaft 9 is provided with a gear member 21 so as to be integrally rotatable. For this reason, when the gear part 43 of the gear member 21 meshes with the lock part 41 of the lock member 5, the rotation of the drive shaft 9 is prevented, and the transmission of the drive force from the drive source to the wheels is prevented. Further, when the meshing between the gear portion 43 and the lock portion 41 is released, the prevention of the rotation of the drive shaft 9 is released, and the driving force can be transmitted from the drive source to the wheels.

  In the park lock structure 1 configured as described above, the moving member 23 is moved to the lock member 5 side by the operation of the actuator, and the operation member 25 contacts the contact portion 39 of the lock member 5. At this time, the cam surface 33 of the operation member 25 presses the contact portion 39 of the lock member 5 and presses the contact portion 39 side of the lock member 5 against the urging force of the return spring 45. As a result, the lock portion 41 of the lock member 5 is pushed up with the shaft support member 7 as a fulcrum, and meshes with the gear portion 43 of the gear member 21 to prevent the drive shaft 9 from rotating. When the lock portion 41 is positioned on the tooth surface of the gear portion 43 and is not engaged with the gear portion 43, the lock portion 41 is biased toward the tooth bottom of the gear portion 43 by the wait spring 35 as a wait mechanism. Thus, when the lock portion 41 is located at the meshing position with the gear portion 43, the gear portion 43 meshes with the gear portion 43.

  To release the locked state of the lock member 5, that is, the engaged state of the lock portion 41 and the gear portion 43, the moving member 23 is moved to the opposite side of the lock member 5 by the operation of the actuator, The contact with the contact portion 39 of the lock member 5 is released. At this time, the abutting portion 39 of the lock member 5 is raised by the urging force of the return spring 45 and accommodated in the sleeve 31. As a result, the lock portion 41 of the lock member 5 is lowered with the shaft support member 7 as a fulcrum, the meshing with the gear portion 43 of the gear member 21 is released, and the prevention of rotation of the drive shaft 9 is released.

  As described above, the rocking of the lock member 5 operates the meshing between the lock portion 41 of the lock member 5 and the gear portion 43 of the gear member 21 to control the rotation of the drive shaft 9. The rocking of the lock member 5 is performed by the shaft support of the shaft support member 7. A projecting portion 15 is provided on the counterpart case 13 that faces the shaft support member 7 in the direction of removal.

  As shown in FIGS. 2 and 3, the mating case 13 is assembled to the casing 3 so as to close the opening surface 11 of the casing 3. A projecting portion 15 is provided at a position facing the shaft support member 7 of the counterpart case 13.

  The protruding portion 15 is provided at the center of the wall surface 17 of the counterpart case 13 and protrudes toward the opening surface 11 side. The protrusion 15 is a rib that reinforces the wall surface 17 of the counterpart case 13 that is relatively thin. A part of the projecting portion 15 which is such a reinforcing rib is disposed opposite to the end portion of the shaft support member 7 in a state where the counterpart case 13 is assembled to the casing 3, and prevents the shaft support member 7 and the return spring 45 from coming off. doing. That is, the protrusion 15 serves as both a retaining member for the shaft support member 7 and a reinforcing rib for the counterpart case 13, and is efficiently disposed without being disposed with only one function.

  In such a park lock structure 1, the protruding portion 15 that protrudes toward the shaft support member 7 is provided in a state where the counterpart case 13 is assembled to the casing 3, so that the counterpart case 13 is assembled to the casing 3. The protrusion 15 can be disposed opposite to the shaft support member 7, and the shaft support member 7 can be prevented from coming off.

  Therefore, in such a park lock structure 1, the shaft support member 7 can be prevented from coming off without increasing the number of parts.

  Moreover, since the protrusion part 15 is a rib which is provided in the center part of the wall surface 17 of the other party case 13, and reinforces the wall surface 17, the protrusion part 15 which is a reinforcement rib can be utilized efficiently.

  In the park lock structure according to the embodiment of the present invention, the shaft support member is directly fixed to the casing. However, the shaft support member is fixed between the shaft support member and the casing via a sliding member or the like. May be. In this case, the sliding of the shaft support member is reduced, and the durability of the shaft support member can be improved.

DESCRIPTION OF SYMBOLS 1 ... Park lock structure 3 ... Casing 5 ... Lock member 7 ... Shaft support member 9 ... Drive shaft 11 ... Opening surface 13 ... Counterpart case 15 ... Projection part 17 ... Wall surface

Claims (2)

A casing, a lock member that is housed and supported in the casing so as to be swingable, a shaft support member that is inserted into the lock member and is assembled to the casing and pivotally supports the lock member, and the lock member that is housed in the casing A parking lock structure comprising a drive shaft whose rotation is prevented or prevented from being rotated by swinging, and a mating case assembled to the opening surface of the casing,
The parker structure, wherein the counterpart case is provided with a protruding portion that protrudes toward the shaft support member in a state assembled to the casing. The park lock structure according to claim 1,
The park lock structure, wherein the projecting portion is a rib provided at a central portion of the wall surface of the counterpart case to reinforce the wall surface.

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