JPH09207731A - Parking mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly prevent park locking due to malfunction of a parking pole when travelling on a bad road, etc. SOLUTION: A pole return spring 4 to energize a parking pole 2 to the side of a parking release position is installed on the parking pole 2 provided free to revolve along the parking release position separated from a park gear 1 from a parking position to fit on the park gear 1. Additionally, a check valve 5 to hold the parking pole 2 at the parking release position is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved parking mechanism.

[0002]

2. Description of the Related Art Conventionally, a parking mechanism of an automobile is constructed as schematically shown in FIG. 7, and a parking pole 2 having a fitting projection 3 which can be fitted to a park gear 1 has a shaft P. Is provided rotatably about the parking pole 2.
Is provided with a pole return spring 4 for urging the parking lock 2 in the parking releasing direction, and the parking pole 2 is rotated upward in the drawing to fit the fitting protrusion 3 into the park gear 1. On the contrary, the parking can be released by rotating the parking pole 2 downward.

While the vehicle is traveling, the parking pole 2 is held at the parking release position by the urging force of the pole return spring 4. However, the parking pole 2 also vibrates due to the vibration of the traveling vehicle and the like. 2 vibration sound is generated, and in the worst case,
There is also a possibility that the parking pole 2 may be caught in the park gear 1 due to the vibration and may cause a parking lock. In order to avoid such a situation, if the urging force of the pole return spring 4 is strengthened and the parking pole 2 is held at the parking release position by the strong force of the spring, the influence of vibration can be avoided. However, if the urging force of the pole return spring 4 is strengthened in this way, the operability when the parking pole 2 is rotated to the park gear 1 side for parking lock becomes extremely poor. There will be some problems.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems of the prior art, and reliably prevents parking lock due to malfunction of a parking pole during traveling on a bad road and has good operability. The first gist of the invention is to provide a parking mechanism that can be turned into a parking pole that is rotatable from a parking position that fits into a park gear to a parking release position that is separated from the park gear. A pole return spring for urging the parking pole toward the parking release position is attached, and a check valve for holding the parking pole at the parking release position is provided. The second gist is that the check valve includes an engagement ball urged by a spring that engages with an engagement groove formed in the parking pole at the parking release position.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a parking mechanism of the first embodiment. In the figure, a parking pole 2 having a fitting protrusion 3 that can be fitted to a park gear 1 is arranged so as to be rotatable about an axis P. The parking pole 2 is attached to the axis P.
Is attached to the parking release direction. In this example, a recessed engagement groove 9 is formed at the tip of the parking pole 2 on the side of the pole return spring 4. A check valve 5 that is detachably engaged with the engagement groove 9 is fixed to the body side.

The check valve 5 is fixed to the body side by a mounting screw 6, and an engaging ball 8 is provided at the tip of an internal check spring 7, and the engaging ball 8 is placed in the engaging groove 9. By engaging the check pole 7 with the urging force of the check spring 7,
Can be held in a good anti-vibration state at the parking release position.

That is, when the parking pole 2 is in the parking release position, the engaging ball 8 is engaged in the engaging groove 9, and the urging force of the check spring 7 firmly holds the engaging ball 8 in the engaging groove 9. As a result, the parking pole 2 is prevented from vibrating, and the parking pole 2 is prevented from vibrating even when driving on a bad road, and the parking pole 2 malfunctions as in the past and rotates to the park gear 1 side. It is possible to reliably prevent being moved and parked.

Since the check valve 5 is provided in this way, the biasing force of the pole return spring 4 can be set weakly, and if the biasing force of the pole return spring 4 is weakened, the parking pole 2 is rotated toward the park gear 1 side. The operability at the time of the parking lock is improved, and the parking pole 2 can be rotated to the parking position with a light force.

As shown in FIG. 2, when the parking pole 2 is rotated to the parking position, the engaging groove 9
When the engaging ball 8 gets over the groove of, the engaging ball 8 rolls on the tip end surface of the parking pole 2, and the engaging ball 8 can be pulled out of the engaging groove 9 with little force. You can
The operability is weak, and the side effect on operability is small.

Next, FIG. 3 shows a second embodiment. In FIG. 3, the check valve 5 is changed, and in FIG. 3, the leaf spring 10 is erected from the body side, The engaging ball 8 is provided on the upper end side of the leaf spring 10,
The configuration is such that the engaging ball 8 can be pressed toward the engaging groove 9 side by the urging force of the leaf spring 10. Other configurations are similar to those in FIG. Is attached and the description is omitted.

Also in this example, the engaging ball 8 is engaged in the engaging groove 9 of the parking pole 2 by the urging force of the leaf spring 10 at the parking release position, and thus the parking pole 2 is made good at the parking release position. Hold on,
In addition, the vibration of the parking pole 2 can be effectively prevented, and the parking lock due to the malfunction of the parking pole 2 during traveling on a bad road can be well prevented.

Next, FIG. 4 shows a third embodiment. In FIG. 4, an engaging groove 9 is formed on the free end side of the parking pole 2 opposite to the axis P, and the engaging groove 9 is formed. A check valve 5 that can be engaged with the groove 9 is provided on the free end side of the parking pole 2. When the parking pole 2 is at the parking release position, the check valve 7 is engaged in the engaging groove 9 by the urging force of the check spring 7. The ball 8 is engaged,
As a result, the vibration of the parking pole 2 can be favorably prevented, and the parking lock due to the malfunction of the parking pole 2 can be favorably prevented.

Further, FIG. 5 shows a fourth embodiment, and FIG. 6 is a schematic plan view of FIG. 5 and 6 show an engaging groove 9 formed on the side surface side of the parking pole 2, and the engaging ball 8 is urged by the check spring 7 from the side surface side to the engaging groove 9. The check valve 5 that can be engaged with is provided. Also in this example, the engagement ball 8 is inserted into the engagement groove 9 at the parking release position of the parking pole 2.
Are engaged with each other, the parking pole 2 can be favorably held at the parking release position, the vibration of the parking pole 2 can be favorably prevented, and the parking lock caused by the malfunction of the parking pole 2 during traveling on a bad road can be achieved. Can be reliably prevented.

[0014]

According to the parking mechanism of the present invention, the parking pole is rotatably provided from the parking position fitted to the park gear to the parking release position separated from the park gear. The pole return spring that urges the position to the position side is attached, and the check valve that holds the parking pole in the parking release position is provided. Since the vehicle is held in the locked state, there is an effect that it is possible to reliably prevent parking lock due to a malfunction of the parking pole when the vehicle runs on a bad road.

Further, the check valve is provided with an engagement ball urged by a spring which engages with an engagement groove formed in the parking pole in the parking release position, so that the engagement ball is parked. By engaging the engaging groove formed in the pawl via the spring, the parking pawl can be reliably held at the parking release position and the vibration can be prevented, and the malfunction of the parking pawl can be surely prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram around a parking pole according to a first embodiment.

FIG. 2 is an enlarged configuration diagram of essential parts in a state where the parking pole is rotated from the state of FIG. 1 to a parking position and meshed with a park gear.

FIG. 3 is a schematic configuration diagram of a parking pole according to a second embodiment.

FIG. 4 is a schematic configuration diagram of a parking pole according to a third embodiment.

FIG. 5 is a schematic configuration diagram of a parking pole according to a fourth embodiment.

FIG. 6 is a schematic plan view of FIG.

FIG. 7 is a schematic configuration diagram around a conventional parking pole.

[Explanation of symbols]

 1 Park gear 2 Parking pole 3 Fitting protrusion 4 Pole return spring 5 Check valve 7 Check spring 8 Engaging ball 9 Engaging groove 10 Leaf spring P axis

Claims (2)

[Claims] 1. A parking pole rotatably provided from a parking position fitted to a park gear to a parking release position separated from the park gear, the pole for urging the parking pole toward the parking release position. A parking mechanism having a return spring and a check valve for holding the parking pole in the parking release position. 2. The check valve includes an engagement ball urged by a spring that engages with an engagement groove formed in the parking pole in the parking release position. Parking mechanism described in.