JPH0330538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a park clock configured to prevent rotation of an output shaft of an automatic transmission by operating a range switching manual lever of the automatic transmission to a parking range. This invention relates to an actuator roller in a device.

(Prior art and its problems) As a conventional park lock device for an automatic transmission, there is, for example, one shown in Japanese Utility Model Application Publication No. 1981-19156.

However, as mentioned above, two actuator rollers are rotatably supported on the shaft pins at the free end of the actuator member, so as to cooperate with the cam surface of the parking pole and the guide support surface of the parking support, respectively. The actuator rollers are arranged in parallel, and the two actuator rollers are pushed between the parking pole and the fixed parking support by the movement of the actuator member, rotate the parking pole, and move the pawl of the parking pole between the teeth of the parking gear. In a configuration in which the parking gear is pushed into the parking gear to lock the parking gear, the weight of the vehicle (inclination) is applied to the parking gear, and the torque exerts a releasing force on the parking pole in the direction of pushing the pawl out from between the teeth of the parking gear. A considerable amount of force is applied to the Yueta roller.

Therefore, in the configuration in which the above-mentioned force is supported by the shaft pin b of the actuator roller a as shown in FIG. 1, a large force is applied to the shaft pin b, so it is necessary to increase the diameter of the shaft pin b. As a result, there is a problem that the overall size becomes large.

(Object of the invention) The object of the invention is to solve the above-mentioned problems.

(Structure of the Invention) Since the force that acts when the actuator roller is pulled up from the P range to the R range is small, the actuator roller is The above-mentioned problem has been solved by having a configuration in which it is supported only by the Yueta roller.

(Embodiment of the invention) Figures 2 to 4 are diagrams showing one embodiment of the invention.

In the figure, 1 is a parking gear fixed to an output shaft 2 which is an output member of an automatic transmission and can rotate together with the output shaft, 3 is a parking pole, 4 is a parking actuator, and 5 is a parking support.

The parking pole 3 is rotatably supported by a pivot shaft 8 supported by a transmission case 6 and a side cover 7 at an intermediate portion between its upper and lower ends, and is mounted between teeth 9 of a parking gear 1 at its lower end. The parking support 5 has a claw portion 10 that can be entered into.
It has an operating cam surface 11 at the upper end located opposite to. A spacer 12 is installed on the pivot shaft 8 by being inserted between the parking pole 3 and the side cover 7, and a return spring 13 made of a torsion coil spring is wound around the spacer 12, and one arm 13a of the spacer 12 is installed. is engaged with the parking pole 3, and the other stopper arm 13b is engaged with the inner wall surface of the case of the side cover 7, thereby causing the parking pole 3 to move around the pivot shaft 8 into the second stopper arm 13b.
In the figure, it is configured to be energized in the counterclockwise direction.

The parking actuator 4 includes an actuator lever 15 whose one end is pivotally supported to the transmission case 6 by a shaft 14, and two actuator rollers 16 are disposed at the free end of the actuator lever 15. They are each rotatably attached by a shaft pin 17. Actuator lever 1
5 is connected via a park rod 18 to a manual plate 19 that interlocks with a range switching manual lever (not shown).
The connection between the park rod 18 and the actuator lever 15 is achieved by pivoting the rod end to the actuator lever 15 via the pivot block 20, and the connection between the park rod 18 and the manual plate 19 is achieved by bending the rod end. This is done by pivotally mounting it on the manual plate 19. The pivot block 20 is slidably inserted into the rod end through its center hole, and is prevented from coming off by a pin 21 inserted into the rod end. seat 22
A compression coil spring 23 is inserted between the
As a result, the pivot block 20 is attached to the retaining pin 21.
It is configured so that it is pressed by a spring force and has a waiting function.

The manual plate 19 has a fan shape, and its center portion is rotatably connected to the transmission case 6 by a pivot shaft 24, and the outer periphery has notches P, R, corresponding to a plurality of ranges. N,D,
, and when the manual plate 19 is rotated around the pivot shaft 24 by operating the manual lever, the detent spring 25 is inserted into the corresponding notch, for example, the notch P in the illustrated rotational position.
A roller 26 at the tip of the lever is fitted into the lever, thereby providing a sense of moderation in operating the manual lever.

The two actuator rollers 16 rotatably attached to the free ends of the actuator lever 15 of the parking actuator 4 by shaft pins are rotated when the actuator lever 15 is rotated around the shaft 14. parking pole 3
The parking support 5 is pushed between the cam surface of the bolt 2 and the support surface 27 of the parking support 5.
8 and 29, the upper end of the parking pole 3 is pushed out to the right in FIG. 2 against the spring force of the return spring 13. It is configured such that the claw portion 10 at the lower end can be pushed between the teeth 9 of the parking gear 1.

According to this parking lock device, when the manual lever is operated in the parking range, the manual plate 19 is brought to a rotational position where the roller 26 fits into the notch P, and at this time, the actuator lever 15 is moved through the park rod 18 as shown by the solid line. rotated to the desired position. As a result, actuator roller 1
6 is the guide support surface 2 of the parking support 5
7 and presses the cam surface 11 of the parking pawl 3 as described above, bringing the parking pawl 3 to the rotational position shown in FIG. It enters between the teeth 9 of 1 and provides a parklock effect.

On the other hand, when the manual lever is operated as described above, the pawl portion 10 of the parking pawl 3 hits the teeth 9 of the parking gear 1, and the parking pawl 3 is moved to the second position.
If the rotational position shown in the figure cannot be achieved, the actuator lever 15 also cannot be rotated by an amount greater than the amount corresponding to the amount of rotation of the parking pole 3.
The park rod 18 moves relative to the pivot block 15 while compressing the spring 23 and reaches its final position. Then, the parking gear 1 rotates due to the subsequent rolling of the wheels, and the tooth spaces between the teeth and the pawls are rotated.
When the position of the actuator lever 10 is aligned, the compression reaction force of the compression coil spring 23 causes the actuator lever 1 to
5 is rotated, whereby the actuator roller 16 can rotate the parking pole 3 until its lower end pawl 10 is completely pushed into the spaces between the teeth of the parking gear 1, thereby enabling the actuator roller 16 to parklock.

Also, when operating the manual lever from the parking range to another range, use the manual plate 1.
9 is rotated in the direction of arrow A in FIG. 3, and actuator lever 15 is rotated in the direction of arrow B. Therefore, the actuator roller 16 also rotates to connect the parking pole 3 and the parking support 5.
The parking pawl 3 returns to the position shown by the imaginary line in FIG. This releases the park lock.

In the present invention, as shown in FIG. 4, the center-to-center distance L of the shaft pin 17, which is the center of rotation of the actuator roller 16 + the diameter d of the shaft pin 17, is the outer diameter D of the actuator roller 16 + the inner diameter H. Make it smaller.

(Effects of the Invention) According to the present invention, the above-described configuration allows the force from the lateral direction of the rollers to move from the cam surface 11 of the parking pole 3 to the two actuator rollers 16 without acting on the shaft pin 17. It is then transmitted to the guide support surface 27 of the parking support 5 and supported by the parking support 5, so that the diameter of the shaft pin 17 can be made thinner.
This provides the effect that the entire device can be configured compactly.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a conventional actuator roller, FIG. 2 is a front view of the park lock device of the present invention, FIG. 3 is a side view of the park lock device shown in FIG. 1, and FIG. FIG. 2 is a schematic diagram showing the configuration of an actuator roller according to the present invention. 1... Parking gear, 2... Output shaft, 3...
Parking pole, 4... Parking actuator, 5... Parking support, 6... Transmission case, 7... Side cover, 8...
... Pivot, 9 ... Parking gear teeth, 10 ... Claw portion, 11 ... Cam surface, 12 ... Spacer, 13 ...
...Return spring, 13b... Stopper arm, 14... Shaft, 15... Actuator lever, 16... Actuator roller, 17... Shaft pin, 18... Park rod, 19... Manual plate, 20... ... Pivot block, 21 ... Retaining pin, 22 ... Spring seat, 23 ... Compression coil spring, 24 ... Pivot shaft, 25 ... Detent spring, P, R, N, D, ... Notch, 26...roller, 27...guiding support surface.

Claims (1)

[Scope of Claims] 1. A parking gear fixed to an output member of an automatic transmission, a rotatably supported parking pole having a pawl that can enter between the teeth of the parking gear, and a parking pole with a pawl that can enter between the teeth of the parking gear; a return spring that elastically holds the parking pole in a rotational position separated from between the teeth of the parking gear, a rotational cam surface provided on the parking pole, and a return spring located opposite to the rotational cam surface. A fixed parking support having a guide support surface, and two parallel parking supports rotatably supported by shaft pins so as to cooperate with the rotation cam surface of the parking pole and the guide support surface of the parking support, respectively. actuator rollers, and these actuator rollers resist the force of the return spring between the guiding support surface of the parking support and the rotating cam surface of the parking pole in the parking range position of the automatic transmission. In the parking lock device, the pawl portion of the parking pole enters between the teeth of the parking gear and locks when the pawl is inserted into the parking gear. distance L and
An actuator roller for a park lock device, characterized in that the diameter d of the shaft pin and the outer diameter D and inner diameter H of the actuator roller have a relationship of L+d<D+H.