JP7364384B2 - Park lock device - Google Patents

Description

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

Conventionally, a park lock device includes a casing, a drive shaft rotatably disposed inside the casing, a gear member rotatably mounted to the drive shaft, and a gear member rotatably disposed in the casing. A device is known that includes a locking member as a pawl lock that engages with a gear member and prevents rotation of the drive shaft, and an operating mechanism that swings the locking member (see Patent Document 1).

In this parking lock device, the operating mechanism includes a movable member as a rod movably disposed inside the casing, and is movably disposed at the end of the movable member, and presses the lock member by movement of the movable member. The locking member includes a sleeve that swings the locking member in the direction of engagement with the gear member, and a holding member that is fixed to the casing and serves as a sleeve guide that supports the end of the sleeve and guides movement of the sleeve.

In such a park lock device, the movement of the moving member causes the sleeve to move inside the holding member, the sleeve presses the locking member, the locking member engages with the gear member, and rotation of the drive shaft is prevented.

Japanese Patent Application Publication No. 2012-153291

By the way, in the park lock device as disclosed in Patent Document 1, the sleeve guide is formed to cover the periphery of the sleeve except for the portion where the sleeve and the locking member abut.

By forming the sleeve guide in this way, the sleeve guide can restrict the movement of the sleeve in the direction opposite to the direction in which the pole lock is pressed, and the movement of the sleeve in the direction perpendicular to the direction in which the pole lock is pressed. can.

However, forming the sleeve guide so as to cover the periphery of the sleeve requires complicated processing and increases the manufacturing cost of the sleeve guide.

Therefore, an object of the present invention is to provide a park lock device that can reduce the cost of a sleeve guide.

The present invention includes a casing, a drive shaft rotatably disposed inside the casing, a gear member rotatably provided integrally with the drive shaft, and a gear member pivotally disposed in the casing and configured to rotate. A park lock device comprising a pole lock that engages with a gear member to prevent rotation of the drive shaft, and an operating mechanism that swings the pole lock, the operating mechanism being movably disposed inside the casing. a sleeve that is movably disposed at the end of the rod and that presses the pole lock by movement of the rod and swings the pole lock in a direction of engagement with the gear member; and a sleeve that is fixed to the casing and that is fixed to the casing. a sleeve guide that supports an end of the sleeve and guides movement of the sleeve, and the sleeve guide includes a restriction wall that restricts movement of the sleeve in a direction opposite to the direction in which the pole lock is pressed ; a side wall that is formed of a continuous member and restricts movement of the sleeve in one direction perpendicular to the direction in which the pole lock is pressed; The other side wall restricts movement to the other side in the direction orthogonal to the other side.

In this park lock device, the sleeve guide includes a restriction wall that restricts movement of the sleeve in the direction opposite to the direction in which the pole lock is pressed, and a restriction wall that restricts movement of the sleeve in one direction orthogonal to the direction in which the pole lock is pressed. Since the regulating wall and one side wall of the sleeve guide prevent the sleeve from moving in the direction opposite to the direction in which the pole lock is pressed, and the movement of the sleeve in the direction perpendicular to the direction in which the pole lock is pressed. movement can be regulated.

In addition, the casing is provided with the other side wall that restricts the movement of the sleeve in the other direction perpendicular to the direction in which the pole lock is pressed. Movement in the other direction can be restricted.

Therefore, in such a park lock device, the movement of the sleeve can be regulated without making the sleeve guide a complicated shape that covers the periphery of the sleeve, and the cost of the sleeve guide can be reduced.

According to the present invention, it is possible to provide a park lock device that can reduce the cost of the sleeve guide.

FIG. 1 is a partially sectional side view of a park lock device according to an embodiment of the present invention. 1 is a sectional view of a park lock device according to an embodiment of the present invention. FIG. 2 is a perspective view of the park lock device according to the embodiment of the present invention when the sleeve and sleeve guide are assembled to the casing. FIG. 2 is a perspective view of the park lock device according to the embodiment of the present invention when the sleeve and sleeve guide are assembled to the casing. FIG. 2 is a front view of the park lock device according to the embodiment of the present invention when the sleeve and sleeve guide are assembled to the casing. FIG. 3 is a side view of the park lock device according to the embodiment of the present invention when the sleeve and sleeve guide are assembled to the casing. FIG. 2 is a perspective view of a sleeve guide of a park lock device according to an embodiment of the present invention.

A park lock device according to an embodiment of the present invention will be explained using FIGS. 1 to 7.

The park lock device 1 according to the present embodiment includes a casing 3, a drive shaft 5 rotatably disposed inside the casing 3, a gear member 7 rotatably provided integrally with the drive shaft 5, A pawl lock 9 is swingably disposed on the casing 3 and engages with the gear member 7 to prevent rotation of the drive shaft 5 by swinging, and an operating mechanism 11 that swings the pawl lock 9.

The operating mechanism 11 includes a rod 13 that is movably disposed inside the casing 3, and an end of the rod 13 that is movably disposed integrally with the rod 13. The movement of the rod 13 presses the pole lock 9, and the pole lock 9 is connected to the gear member. 7 and a sleeve guide 17 that is fixed to the casing 3 and supports the end of the sleeve 15 and guides the movement of the sleeve 15.

The sleeve guide 17 includes a regulating wall 19 that restricts the movement of the sleeve 15 in the opposite direction to the direction in which the pole lock 9 is pressed, and a restriction wall 19 that restricts the movement of the sleeve 15 in the direction perpendicular to the direction in which the pole lock 9 is pressed. The casing 3 is provided with the other side wall 23 that restricts movement of the sleeve 15 in the other direction in the direction perpendicular to the direction in which the pole lock 9 is pressed.

Further, the sleeve guide 17 is provided with a contact portion 25 that contacts the casing 3 and restricts the sleeve guide 17 from moving in the direction opposite to the direction in which the pole lock 9 of the sleeve 15 is pressed.

Further, the sleeve guide 17 is fixed to the casing 3 via at least two fixing parts 27.

Further, the regulating wall 19, the one side wall 21, and the other side wall 23 are each formed into a plane.

Furthermore, the shape of the pole contact portion 29 of the pole lock 9 that comes into contact with the sleeve 15 is set to be parallel to the regulating wall 19.

As shown in FIGS. 1 to 7, the casing 3 is constructed by combining a plurality of divided cases 31.

Inside the casing 3, a drive shaft 5, a gear member 7, a pole lock 9, an operating mechanism 11, and the like are housed.

The drive shaft 5 is an intermediate shaft of a transmission mechanism 33 provided on a power transmission path from an engine (not shown) or an electric motor (not shown) as a drive source to the wheels.

The drive shaft 5 is rotatably supported by the casing 3 via a bearing 35, and is provided as a continuous member with a transmission gear 37 for transmitting power.

Note that a detection sensor 39 that detects rotation of the drive shaft 5 is arranged at the end of the drive shaft 5, and can detect whether or not the drive shaft 5 is rotating.

A gear member 7 is rotatably provided on the drive shaft 5 by means of fixing means such as press fitting or welding.

When this gear member 7 engages with the pawl lock 9, rotation of the drive shaft 5 is blocked, power transmission in the transmission mechanism 33 is blocked, and transmission of driving force from the drive source to the wheels is blocked.

The pole lock 9 is swingably supported by a pole holding part 41 provided on the casing 3 via a shaft part 43, and includes a pole contact part 29 and a lock part 45.

The pole contact portion 29 is provided on one end side of the pole lock 9, and is disposed inside the sleeve guide 17 that guides the sleeve 15 at a swinging position of the pole lock 9 where the lock portion 45 is not engaged with the gear member 7. .

The pole contact portion 29 is arranged so as to be able to come into contact with the sleeve 15 within the sleeve guide 17, and comes into contact with the sleeve 15 as the sleeve 15 moves, and the pole contact portion 29 is arranged in such a manner that the lock portion 45 of the pole lock 9 is engaged with the gear member 7. Rock 9.

The lock part 45 is provided on the other end side of the pole lock 9, and when the pole contact part 29 contacts the sleeve 15 and the pole lock 9 is swung, it engages with the gear member 7 and prevents rotation of the drive shaft 5. do.

At this time, if the lock portion 45 is located on the tooth surface of the gear member 7 and is not engaged with the gear member 7, the lock portion 45 is biased toward the tooth bottom of the gear member 7 by the spring 47 as a waiting mechanism. The lock portion 45 engages with the gear member 7 when the lock portion 45 is located at the engagement position with the gear member 7.

A release spring 49 is disposed in such a pawl lock 9 and urges the pawl lock 9 to swing in a direction in which the engagement between the lock portion 45 and the gear member 7 is released.

The urging force of the release spring 49 is set to be weaker than that of the spring 47 serving as a waiting mechanism.

Such a release spring 49 swings the pole lock 9 in the direction of releasing the engagement between the lock part 45 and the gear member 7 when the contact between the pole contact part 29 of the pole lock 9 and the sleeve 15 is released.

This swinging of the pole lock 9 causes the lock portion 45 to disengage from the gear member 7, thereby releasing the inhibition of rotation of the drive shaft 5.

Such a pole lock 9 is swing-operated by an operating mechanism 11.

The operating mechanism 11 includes a rotating shaft 51, a rotating member 53, a biasing member 55, a rod 13, a sleeve 15, and a sleeve guide 17.

The rotating shaft 51 passes through the side wall of the casing 3 and is rotatably supported by the side wall of the casing 3.

An actuator (not shown) consisting of an electric motor attached to the outside of the casing 3 is connected to an end of the rotating shaft 51 located outside the casing 3 .

This actuator is actuated by a user such as a driver switching a shift range, and drives the rotary shaft 51 to rotate.

A rotating member 53 is provided on the end side of the rotating shaft 51 disposed inside the casing 3 so as to be rotatable therewith.

The rotating member 53 is made of a thin plate, and rotates around the axis of the rotating shaft 51 as the rotating shaft 51 rotates.

This rotating member 53 is configured to move the rotation shaft 51, that is, the actuator, from one side to the other to a lock position where the pole lock 9 prevents rotation of the drive shaft 5, and a lock position where the pole lock 9 prevents rotation of the drive shaft 5. It is rotated between the unlocked position and the unlocked position.

The rotating member 53 has an engaging portion that is engaged with the cylindrical roller 61 of the biasing member 55 when the rotating member 53 is located at the lock position and when the rotating member 53 is located at the unlocked position. 57 and 59 are provided.

The biasing member 55 is made of a plate spring, has one end fixed to the casing 3 with a bolt, and has a cylindrical roller 61 engaged with the engaging portions 57 and 59 of the rotating member 53 at the other end.

The cylindrical roller 61 of the biasing member 55 moves between the engaging portions 57 and 59 of the rotating member 53 due to the rotation of the rotating member 53, and is engaged with either of the engaging portions 57 and 59. Ru.

When the cylindrical roller 61 is engaged with the engaging portions 57 and 59, the biasing member 55 applies a biasing force to the rotating member 53 and restricts rotation of the rotating member 53.

Specifically, the cylindrical roller 61 is engaged by applying a biasing force to the engaging portion 57 when the rotating member 53 is located at the lock position side.

On the other hand, the cylindrical roller 61 applies a biasing force to the engaging portion 59 and is engaged when the rotating member 53 is located at the unlocked position side.

In this way, the biasing member 55 applies a biasing force to the rotary member 53 in two stages, the lock position side and the unlock position side of the rotary member 53, and defines the rotation position of the rotary member 53.

Note that the rotating member 53 is provided with regulating portions 63 and 65 that abut against abutted portions of the other divided case (not shown) assembled to the divided case 31 constituting the casing 3 .

When the rotating member 53 rotates to the lock position side or the unlocked position side, the regulating portions 63 and 65 are brought into contact with the abutted portions of the other divided case, respectively, and the restricting portions 63 and 65 The rotating position of the rotating member 53 is defined.

The end of the rod 13 is engaged with such a rotating member 53, and the rotation of the rotating member 53 causes the rod 13 to move in the axial direction.

The rod 13 is disposed between the rotating member 53 and the sleeve guide 17, one end is engaged with the rotating member 53, and the other end is movable in the axial direction within the sleeve guide 17 by rotation of the rotating member 53. It is located in

A sleeve 15 is provided at the end of the rod 13 located within the sleeve guide 17 .

The sleeve 15 is formed in a bottomed cylindrical shape so as to cover the end of the rod 13, and is provided at the end of the rod 13 so as to be movable integrally with the rod 13 in the axial direction and to be movable on the rod 13.

This sleeve 15 is provided with a cam surface 67 continuous in the circumferential direction that contacts the pawl contact portion 29 of the pawl lock 9 and is inclined so as to reduce the outer diameter toward the end of the rod 13. There is.

In this cam surface 67, a first cam surface 69 located on the end side of the rod 13 has a large inclination angle, and a second cam surface 71 that continues from this portion toward the opposite side of the end of the rod 13. The tilt angle is set small.

As the sleeve 15 moves, the first cam surface 69 first comes into contact with the pawl contact portion 29 of the pawl lock 9, and presses the pawl lock 9 in the direction of engagement between the lock portion 45 and the gear member 7. The lock portion 45 and the gear member 7 are engaged with each other.

Next, as the sleeve 15 moves further, the second cam surface 71 comes into contact with the pawl abutting part 29 of the pawl lock 9, gradually pressing the pawl lock 9 in the direction of engagement between the lock part 45 and the gear member 7, and the lock part 45 and the gear member 7 are maintained in a meshing state.

Note that the sleeve 15 is in contact with a spring 47, which serves as the above-mentioned waiting mechanism and is disposed around the outer periphery of the rod 13, so that the lock portion 45 and the gear member 7 can be meshed stably.

Such a sleeve 15 is housed in a sleeve guide 17, and movement of the sleeve 15 is guided.

The sleeve guide 17 is fixed to the casing 3 by fastening bolts 73 to the two fixing parts 27, respectively.

This sleeve guide 17 is provided with a support hole 75 through which the end of the sleeve 15 is inserted, and supports the end of the sleeve 15 in a movable manner.

Such a sleeve guide 17 includes a regulating wall 19 and one side wall 21.

The regulating wall 19 is arranged to face the pole contact portion 29 of the pole lock 9 with the sleeve 15 in between in the swinging direction of the pole lock 9.

This regulating wall 19 is formed in a plane so as to be parallel to a direction perpendicular to the swinging direction of the pole lock 9.

Such a regulating wall 19 is provided with a guide surface 77 that is inclined at the same angle of inclination as the first cam surface 69 of the sleeve 15 .

As the sleeve 15 moves, this guide surface 77 first comes into contact with the first cam surface 69 of the sleeve 15, moves the sleeve 15 in the direction in which the pole lock 9 is pressed, and then the end portion of the guide surface 77 contacts the first cam surface 69 of the sleeve 15. The sleeve 15 is held in a moved state by contacting the surface 71.

By coming into contact with the sleeve 15, such a regulating wall 19 regulates the movement of the sleeve 15 in the direction opposite to the direction in which the pole lock 9 is pressed.

Here, the pole contact portion 29 of the pole lock 9 is formed in a plane parallel to the direction perpendicular to the swinging direction of the pole lock 9, similarly to the regulating wall 19.

By forming the pole abutting part 29 and the regulating wall 19 in this way, when the sleeve 15 abuts the regulating wall 19 and the pole abutting part 29, the sleeve 15 crosses the swinging direction of the pole lock 9. It is possible to restrict movement in a tilted direction.

In addition, by forming the pole contact portion 29 with a plane parallel to the regulating wall 19, it is possible to prevent the pole lock 9 from shaking and swinging.

Furthermore, in the swinging direction, the pole lock 9 is arranged in a gap that is set parallel and uniform between the regulating wall 19 and the plane of the pole lock 9 in the front-rear direction, so that the pole lock 9 can be operated reliably in the swinging direction. Even when minute vibrations are input in the direction perpendicular to the swinging direction of the pole lock 9, the vibration can prevent the pole lock 9 from operating in an unexpected direction, preventing uneven wear or impact on the surface of the pole lock 9. It is possible to prevent the formation of marks.

The configurations of the one side wall 21 and the other side wall 23 and their respective functions are as follows.

One side wall 21 is formed of a single member continuous with the regulating wall 19 so that the angle between one end of the regulating wall 19 and the regulating wall 19 is a right angle.

This one side wall 21 is disposed on one side of the sleeve 15 in a direction orthogonal to the swinging direction of the pole lock 9, and has a flat surface so that the surface facing the sleeve 15 is parallel to the swinging direction of the pole lock 9. It is formed of.

When the sleeve 15 attempts to move to one side in the direction orthogonal to the swinging direction of the pole lock 9, the one side wall 21 contacts the sleeve 15 and restricts the movement of the sleeve 15 to one side in the orthogonal direction. Then, the sleeve 15 is guided in the swinging direction of the pole lock 9.

At this time, since the one side wall 21 is formed of a flat surface, it can stably guide the movement of the sleeve 15 in the swinging direction of the pole lock 9.

The other side wall 23 provided in the casing 3 is disposed on the side opposite to such one side wall 21 with the sleeve 15 interposed therebetween.

The other side wall 23 is provided in the casing 3 and is disposed on the other side of the sleeve 15 in a direction orthogonal to the swinging direction of the pole lock 9.

The other side wall 23 is formed of a flat surface so that the surface facing the sleeve 15 is parallel to the swinging direction of the pole lock 9.

When the sleeve 15 attempts to move to the other side in the direction orthogonal to the swinging direction of the pole lock 9, the other side wall 23 comes into contact with the sleeve 15 and restricts the movement of the sleeve 15 to the other side in the orthogonal direction. Then, the sleeve 15 is guided in the swinging direction of the pole lock 9.

At this time, since the other side wall 23 is formed of a flat surface, it can stably guide the movement of the sleeve 15 in the swinging direction of the pole lock 9.

By providing the other side wall 23 on the casing 3 in this manner, the sleeve guide 17 only needs to be provided with the regulating wall 19 and the one side wall 21, and the shape of the sleeve guide 17 can be simplified.

Therefore, the sleeve guide 17 can be easily processed, and the manufacturing cost of the sleeve guide 17 can be reduced.

The sleeve guide 17 is provided with a contact portion 25 that restricts the sleeve guide 17 from moving in the direction opposite to the direction in which the pole lock 9 of the sleeve 15 is pressed.

The contact portion 25 is provided on the opposite side of the regulating wall 19 to the side where the guide surface 77 is provided, and is formed of a flat surface so as to be parallel to a direction orthogonal to the swinging direction of the pole lock 9. .

This abutting portion 25 abuts against an abutted portion 79 provided on the casing 3 in a state where the sleeve guide 17 is assembled to the casing 3 via the two fixing portions 27 .

When the sleeve 15 comes into contact with the pole contact part 29 of the pole lock 9 and a reaction force is input to the sleeve guide 17 in the direction opposite to the pressing direction of the pole lock 9, such a contact part 25 absorbs the reaction force. is received by contact with the abutted portion 79 of the casing 3.

Here, if the sleeve guide 17 is not provided with the contact part 25, when a reaction force is input to the sleeve guide 17 in the opposite direction to the pressing direction of the pole lock 9, the reaction force is absorbed by the fixing part 27. I will receive it.

Therefore, in order to sufficiently receive this reaction force, in the conventional sleeve guide, in addition to fastening the bolt 73, a highly rigid knock pin is used to position the sleeve guide 17 with respect to the casing 3, and the fixing structure is The cost was getting higher.

On the other hand, by providing the contact portion 25 on the sleeve guide 17, the reaction force input to the sleeve guide 17 can be received by the casing 3. It can be used as the fixed part 27, and the cost can be reduced.

In such a park lock device 1, the sleeve guide 17 includes a regulating wall 19 that restricts the movement of the sleeve 15 in the direction opposite to the direction in which the pole lock 9 is pressed, and a restriction wall 19 that restricts the movement of the sleeve 15 in the direction perpendicular to the direction in which the pole lock 9 is pressed. Since the one side wall 21 that restricts movement to one side is provided, the restriction wall 19 of the sleeve guide 17 and the one side wall 21 prevent the sleeve 15 from moving in the opposite direction to the pressing direction of the pole lock 9, and the sleeve It is possible to restrict the movement of the 15 pole locks 9 to one side in a direction orthogonal to the pressing direction.

Furthermore, the casing 3 is provided with the other side wall 23 that restricts the movement of the sleeve 15 in the other direction perpendicular to the pressing direction of the pole lock 9. Movement of the pole lock 9 toward the other side in the direction orthogonal to the pressing direction can be restricted.

Therefore, in such a park lock device 1, the movement of the sleeve 15 can be regulated without forming the sleeve guide 17 into a complicated shape that covers the periphery of the sleeve 15, and the cost of the sleeve guide 17 can be reduced. be able to.

Further, the sleeve guide 17 is provided with a contact portion 25 that comes into contact with the casing 3 and restricts the sleeve guide 17 from moving in the direction opposite to the direction in which the pole lock 9 of the sleeve 15 is pressed. The casing 3 can receive an external force in the opposite direction to the pressing direction through the contact portion 25.

Further, since the sleeve guide 17 is fixed to the casing 3 via at least two fixing parts 27, the structure for fixing the sleeve guide 17 to the casing 3 can be simplified.

Moreover, since the regulating wall 19, the one side wall 21, and the other side wall 23 are each formed into a flat surface, there is no wobbling when the sleeve 15 moves, and the sleeve 15 can be moved stably.

Therefore, the swinging of the pole lock 9 due to the pressing of the sleeve 15 can be stabilized, and the function of preventing rotation of the drive shaft 5 and the function of releasing the rotation blocking due to the swinging of the pole lock 9 can be stabilized.

Further, since the pole contact portion 29 of the pole lock 9 that contacts the sleeve 15 is configured to be parallel to the regulating wall 19, the swinging of the pole lock 9 can be further stabilized.

Note that in the park lock device according to the embodiment of the present invention, the contact portion is provided on the surface of the regulation wall opposite to the guide surface, but the contact portion is not limited to this, and the contact portion is provided in contact with the casing so that the sleeve guide The abutting portion may be provided at any position on the sleeve guide as long as it can restrict movement of the sleeve in the direction opposite to the direction in which the pole lock is pressed.

Furthermore, in a broad sense, the "regulating wall", "one side wall", and "other side wall" may be provided for only one member, the casing 3 and the sleeve guide 17, or for both members. No matter how they are combined, as long as they can be configured to solve the problems of the present invention, they are appropriately set in view of the gist of the invention and are included in the technical scope of the present invention.

1 Park lock device 3 Casing 5 Drive shaft 7 Gear member 9 Pole lock 11 Operating mechanism 13 Rod 15 Sleeve 17 Sleeve guide 19 Regulation wall 21 One side wall 23 Other side wall 25 Contact part 27 Fixed part 29 Pole contact part

Claims (5)

a casing, a drive shaft rotatably disposed inside the casing, a gear member rotatably provided integrally with the drive shaft, and a gear member pivotally disposed in the casing and meshing with the gear member by rocking. A park lock device comprising a pole lock that prevents rotation of the drive shaft and an operation mechanism that swings the pole lock,
The operating mechanism includes a rod movably disposed inside the casing, and an end of the rod that is movably disposed integrally with the rod, and the movement of the rod presses the pole lock to engage the pole lock with the gear member. a sleeve that swings in the direction; and a sleeve guide that is fixed to the casing and supports an end of the sleeve and guides movement of the sleeve,
The sleeve guide includes a restriction wall that restricts movement of the sleeve in a direction opposite to the direction in which the pole lock is pressed, and a restriction wall that is formed of a member that is continuous with the restriction wall and that is perpendicular to the direction in which the sleeve presses the pole lock. One side wall is provided to restrict movement to one side of the
A park lock device characterized in that the casing is provided with another side wall that restricts movement of the sleeve in the other direction in a direction orthogonal to the direction in which the pole lock is pressed. The park lock device according to claim 1,
A park lock device characterized in that the sleeve guide is provided with a contact portion that comes into contact with the casing and restricts the sleeve guide from moving in a direction opposite to the direction in which the pole lock of the sleeve is pressed. . The park lock device according to claim 1 or 2,
The park lock device, wherein the sleeve guide is fixed to the casing via at least two fixing parts. The park lock device according to any one of claims 1 to 3,
The parking lock device is characterized in that the regulation wall, the one side wall, and the other side wall are each formed into a flat surface. The park lock device according to any one of claims 1 to 4,
The parking lock device is characterized in that the regulation wall is formed into a flat surface, and a pole contacting portion of the pole lock that contacts the sleeve is shaped parallel to the regulation wall.

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