JP2574299Y2 - Vehicle parking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle parking device that locks a parking gear to place a vehicle in a parking state.

[0002]

2. Description of the Related Art Conventionally, as this type of apparatus, for example,
The one described in Japanese Utility Model Laid-Open Publication No. 64-28356 is known.

In such a device, a lock pawl ("parking pawl" in the publication) which can be engaged with a parking gear rotating integrally with an output shaft of a transmission is moved in a direction of engagement with the parking gear via a spring. It is configured to move elastically or to forcibly move in the direction away from the parking gear. When the lock claw engages with the parking gear by the former elastic movement, the parking gear is moved. The parking gear is locked, and the parking gear is unlocked by the latter forced movement operation. Further, depending on the rotational position of the parking gear, the locking claw may come into contact with the tip of the parking gear due to the former elastic movement operation, and the parking gear may not be immediately locked (hereinafter, referred to as a “lock waiting state”). In that case, the lock pawl engages with the parking gear after waiting for the minute rotation of the parkin gear due to the slight movement of the vehicle body or the release of the residual torque in the transmission. That is, the lock waiting state is released by the minute rotation of the parking gear. Further, the lock claw is moved by a cam member interlocked with the movement of the parking rod in the axial direction. When the lock claw meshes with the parking gear, the cam member contacts the end of the parking rod. Touch

[0004]

However, in the above-mentioned conventional apparatus, when the lock pawl engages with the parking gear, the cam member comes into contact with the end of the parking rod, so that the parking gear is in a state of waiting for the lock of the parking gear. When released, the impact between the cam member and the end of the parking rod is transmitted to the interior of the vehicle via the parking rod, causing unpleasant impact noise and vibration in the interior of the vehicle.
In addition, the movement of the cam member is shortly limited by the end of the parking rod due to the dimensional variation of each component, and the lock claw may not be able to sufficiently engage with the parking gear.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the generation of unpleasant impact noises and vibrations in a vehicle when the parking gear is released from the lock waiting state and the lock claw engages with the parking gear. It is an object of the present invention to provide a vehicular parking device capable of reliably engaging a lock claw with a parking gear.

[0006]

A parking device for a vehicle according to the present invention is a vehicle parking device capable of locking the parking gear by engaging a pawl of a parking pole between teeth of the parking gear. At
A cam that moves the parking pawl in the direction of engagement with the parking gear by displacing in one direction, and moves the parking pawl away from the parking gear by displacing in the other direction; and A rod that is reciprocated along the direction of displacement of the cam and selectively moved to a first movement position near one displacement direction of the cam and a second movement position near the other displacement direction of the cam; A first operation unit provided on the rod, facing the cam, and elastically displacing the cam in one direction via a spring when the rod moves to the first movement position; A second operation provided on the rod to oppose the cam, and when the rod moves to the second movement position, abuts on the cam to displace the cam in the other direction; And a section, the length of the pawl portion of the parking pawl, the set to be longer than the tooth height of the teeth of the parking gear, the second operation unit, the rod first
And when the pawl of the parking pawl abuts against the tooth bottom of the parking gear, the cam is opposed to the cam at a predetermined interval.

[0007]

According to the vehicle parking device of the present invention, the length of the pawl of the lock pawl is made longer than the tooth height of the tooth of the parking gear, and the former pawl contacts the tooth bottom between the latter. When they come into contact with each other, a cam for moving the lock claw and an operation unit of an operation body for moving the cam face with a predetermined interval. Thus, when the lock wait state in which the lock claw abuts on the tip of the parking gear is released, the claw portion of the lock claw abuts on the bottom of the parking gear, and the impact is applied to the parking gear and the lock claw. To prevent transmission to the inside of the vehicle and avoid generation of unpleasant impact noise and vibration in the vehicle. Further, the lock claw is securely engaged with the parking gear without restricting the movement of the cam by the operation section of the operation body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a casing of a rear extension portion of an automatic transmission for a vehicle, and a parking gear 3 is fixed to an output shaft 2 provided therein. A shaft 4 fixed inside the casing 1 has a parking pole (lock claw) 5.
Are rotatably supported in the directions of arrows A ₁ and A _{2 in} FIG. 1, and a pawl portion 5 </ _b > A that can engage with the tooth portion 3 </ _b > A of the parking gear 3 is provided at an intermediate portion of the parking pole 5. In addition, a contact surface 5B with a cam 11 described later is provided at the tip of the parking pole 5. Its length H ₁ of the claw portion 5A of the parking pawl 5 is set to be longer than the tooth height of H ₂ teeth 3A of the parking gear 3. Further, in the outer peripheral portion of the shaft 4, a return spring 6 for biasing the parking pawl 5 in the arrow A ₂ direction it is supported via a spacer 7. Further, the support member 8 and the guide member 9 attached to the casing 1, the moving parking rod (operating portion) 10 in the arrow B ₁ and B ₂ direction in the front and back direction, that Figure 2 of the paper in FIG. 1 Guided freely. The left end of the rod 10 in FIG. 2 is connected to a select lever (not shown) beside the driver's seat via a link mechanism or the like, and when the select lever is shifted to the P (parking) position, the rod 10 is turned into an arrow. B is operated to move _{in one} direction, the tip portion moves to the P ₁ position as shown in FIG. The select lever by being shifted to a position other than the P position, the rod 10 is operated to move the arrow B ₂ direction, the tip is moved to P ₂ position as shown in FIG. Thus, the rod 10 will be selectively operated to move 2 position of the arrows B ₁ and B ₂ directions.

A cylindrical cam 11 is slidably fitted on the rod 10 along the axial direction of the rod 10.
Its cam 11 is biased in the arrow B ₁ direction by the spring 12. Reference numeral 13 in FIG. 2 denotes a spring receiver (first operation unit) fixed to the rod 10. The cylindrical cam 11 is composed of three ranges of lengths L ₁ , L ₂ and L ₃ (see FIG. 2) in the axial direction. Range of the length L ₁ is a small-diameter portion 11A is equal outer diameter in the axial direction, the portion of the range of the length L _2, the first cam portion which becomes gradually large toward the arrow B ₂ direction 11B, and the part in the range of the length L ₃ is indicated by an arrow B ₂
The second cam portion 1 gradually increases in diameter in the direction and the gradient of the outer peripheral surface is gentler than that of the first cam portion 11B.
1C. A tube 14 (second operation unit) is fitted and fixed to the tip of the rod 10 by welding.

Next, the operation will be described.

[0012] First, when the select lever is shifted to a position other than the P position, as shown in FIG. 2, the rod 10 is operated to move the arrow B ₂ direction, the tip P
_The cam 11 has moved to the _second position, and the cam 11 is pressed against the tube 14 by the force of the spring 12. At this time, the contact surface portion 5B of the parking pawl 5 is pressed against the peripheral surface of the small diameter portion 11A of the cam 11 by the urging force of the spring 6 (see FIG. 1), and the claw portion 5A is moved to the parking gear 3 as shown in FIG. Are separated from the tooth portion 3A. Therefore, at this time, the parking gear 3 is not locked.

Thereafter, when the select lever is shifted to the P position, as shown in FIGS.
0 is operated to move the arrow B ₁ direction, the tip P ₁
Move to the position. At this time, the cam 11 is
2, is elastically pushed in the direction of arrow B ₁ , and the contact position of the parking pole 5 with the contact surface portion 5 </ b> B is reduced to the small diameter portion 11.
Displaced from A in the direction of the first and second cam portions 11B and 11C, accordingly, the parking pawl 5 is rotated in the arrow A ₁ direction against the force of spring 6 (see FIG. 1). The operation at that time differs as indicated by A and B below depending on the state in which the rotation of the parking gear 3 is stopped.

A. "When the tooth bottom between the teeth 3A of the parking gear 3 faces the claw 5A of the parking pole 5" In this case, as shown in FIGS. 5A is the tooth 3A of the parking gear 3
And rotated in the arrow A ₁ direction until it abuts against the tooth bottom between each other, immediately lock the parking gear 3. At this time, as shown in FIG.
₁ moves in the direction of the arrow B1 until the halfway portion of the parking pole 5 contacts the contact surface 5B of the parking pole 5, and the claw 5A of the parking pole 5 is parked as shown in FIG. The gear 3 is brought into pressure contact with the tooth bottom between the tooth portions 3A. Also, at this time, as shown in FIG.
_{There are 4} gaps that do not abut. Thus, the tube 14 is not prevented from moving in the arrow B ₁ direction of the cam 11, the cam 11, by sufficiently rotating the parking pawl 5 in the arrow A ₁ direction, we shall ensure the locking of the parking gear 3 To

B. “Case where the tooth tip of the tooth portion 3A of the parking gear 3 faces the claw 5A of the parking pole 5” In this case, first, as shown in FIG. rotates in the arrow a ₁ direction until brought into contact with the tooth tip of the tooth portion 3A. then,
The cam 11 moves in the direction indicated by the arrow B ₁ until the intermediate portion of the first cam portion 11B presses against the contact surface portion 5B of the parking pawl 5.
And the claw 5A of the parking pawl 5 is pressed against the tooth tip of the tooth 3A of the parking gear 3 by the wedge action of the inclined surface of the cam 11B. Further, at this time, a gap of a predetermined distance L ₅ between the cam 11 and the tube 14 as shown in FIG. 3, they do not abut. Accordingly, at this time, the parking gear 3 is in a lock waiting state.

The lock waiting state is released after a minute rotation of the parking gear 3. That is, the parking gear 3 makes a slight rotation due to the slight movement of the vehicle body or the release of the residual torque in the transmission.
When the tooth bottom between the tooth portions 3A faces the claw portion 5A of the parking pole 5, the same operation as in the case A is performed, and the parking pole 5 locks the parking gear 3. When the lock wait state is released in this way,
Cam 11 moves with the momentum from the position shown in FIG. 3 by the force of the spring 12 to the position shown in FIG. 4, to rotate the parking pole 5 in the arrow A ₁ direction. At that time, since the length H ₁ of the claw portion 5A of the parking pawl 5 is longer than the tooth height of H ₂ parking gear 3, the claw portion 5A in FIG. 1
As shown in FIG. 4 and FIG. Therefore, the impact caused by the contact between the parking pole 5 and the parking gear 3 is received by the parking gear 3 and the cam 11 that is free with respect to the rod 10, and the impact is transmitted to the interior of the vehicle via the rod 10. I don't get it. That is, in the case of the present embodiment, the shock when the lock waiting state is released is absorbed inside the automatic transmission, and the shock is not transmitted to the inside of the vehicle via the rod 10, so that the unpleasant impact sound inside the vehicle is And the occurrence of vibration is avoided.

After the parking gear 3 is locked by the operations A and B, the lock is released.
The selector lever is shifted from the P position to another position, and as shown in FIG. 2, the rod 10 is again operated to move in the direction of arrow B ₂ , and the distal end is moved from the P ₁ position in FIG.
Move to ₂ positions. At that time, the tube 14, the distance L ₄ (see FIG. 4) only comes into contact with the cam 11 to move in the arrow B ₂ direction, then moves in the arrow B ₂ direction together with the cam 11. Then, by the movement of the cam 11, to unlock the parking gear 3 parking pawl 5 is rotated back to the arrow A ₂ direction. Therefore, the distance L ₄ is
The cam 11 sufficiently moved in the arrow B ₂ direction is set to a length that can be reliably unlock the parking gear 3.

[0018]

As described above, in the vehicle parking device of the present invention, the length of the claw portion of the lock claw is made longer than the tooth height of the tooth portion of the parking gear, and the former claw portion is formed of the latter. Since a gap is formed between the cam for moving the lock claw and the operation portion of the operation body for moving the cam when the bottom of the tooth abuts on the tooth bottom, the lock When the lock wait state where the pawl abuts on the tip of the parking gear is released, the pawl portion of the lock pawl is brought into contact with the bottom of the parking gear, and the impact is absorbed by the parking gear and the lock pawl. Transmission to the inside of the vehicle can be prevented, and generation of unpleasant impact noise and vibration in the vehicle can be avoided. In addition, the lock claw can be securely engaged with the parking gear without restricting the movement of the cam by the operation section of the operation body.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG. 1 in a state where a parking gear is unlocked.

FIG. 3 is a cross-sectional view taken along line XX of FIG. 1 in a state where a parking gear is in a lock waiting state.

FIG. 4 is a view showing a state where X of FIG.
It is sectional drawing which follows the X-ray.

[Explanation of symbols]

 Reference Signs List 3 parking gear 3A tooth portion 5 parking pole (locking claw) 5A claw portion 5B contact surface portion 6 return spring 10 parking rod (operating body) 11 cam 12 spring 13 spring receiver (first operation portion) 14 tube (second operation) Part)

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle parking device capable of locking a parking gear by engaging a pawl portion of a parking pawl between teeth of a parking gear, thereby displacing the parking pawl in one direction. A cam that moves in the direction of engagement with the parking gear and moves in a direction that separates the parking pawl from the parking gear by being displaced in the other direction; and a reciprocating operation along the displacement direction of the cam; A rod selectively moved to a first movement position closer to one displacement direction of the cam and a second movement position closer to the other displacement direction of the cam; and a rod provided on the rod and facing the cam. When the rod moves to the first movement position, the cam is elastically displaced in one direction via a spring. A second operating portion, provided on the rod, facing the cam, and contacting the cam to displace the cam in the other direction when the rod moves to the second movement position. An operating part, wherein a length of the claw part of the parking pole is set longer than a tooth height of a tooth part of the parking gear, and the second operating part moves the rod to a first moving position. A parking device for a vehicle, wherein when the pawl portion of the parking pole abuts against the tooth bottom of the parking gear, the parking pawl faces the cam at a predetermined interval.