JPS609090Y2 - Parking brake operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating device for operating a parking brake for a vehicle.

In particular, the present invention relates to an operating device that includes means for preventing noise from being generated from the locking teeth of the operating device and the pawls that engage with the locking teeth when the parking brake is tightened.

A parking brake operating device is normally constructed so that a tightening operation can be completed simply by grasping the grip of the operating lever and rotating it around a pivot at a predetermined angle.

Therefore, the claw part for holding the operating lever in the rotating position is
During the above-mentioned brake tightening operation, the brake is urged in the direction of engaging with the locking teeth and is rotated while slidingly contacting the locking teeth, which generates a squeaking noise.

Moreover, since this control device is located very close to the driver's seat, this noise is relatively loud to the driver's ears, reducing driving comfort.

The present invention was developed with the aim of eliminating this drawback, and its gist is to counter the biasing force that attempts to engage the pawl and the locking tooth, which is a source of noise. The frictional force between the friction body and the sector during the brake tightening operation is used as a force in the opposite direction to counteract this, and this is a novelty in which the brake tightening operation simultaneously acts as an operation to prevent noise generation. They succeeded in developing a control device that could be used with ease.

That is, the gist of the present invention is (a) an operating lever for operating a parking brake for a vehicle, and (b) a lever that is fixed to the vehicle body, pivotally supports the operating lever, and has locking teeth on its outer peripheral surface. (C)
(d) a pawl body which is pivotally mounted on the operating lever and is constantly applied with a biasing force in a direction in which the pawl portion at the tip engages with the locking teeth of the sector; (d) a pawl body connected to the pawl body and a parking brake; (e) a release operating body that rotates the claw body to a non-engaged position with the locking teeth in response to a release operation; When the operating lever is rotated in the direction of activating the parking brake, the tip of the claw body generates a rotational moment in the direction of disengaging from the locking tooth due to the frictional force with the sector. When the operating lever is rotated in the opposite direction, a rotating moment is generated in the opposite direction based on the frictional force with the sector. The distal end claw of the claw body engages with the locking teeth, and when the release operating body is operated, the claw body is slid against the frictional force with the sector and allows rotation of the claw body. and a friction body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, sector 3 is represented by legs 3a, 3
The sector 3 is fixed to the vehicle body by a pin 15, and the operating lever 1 is pivotally attached to the sector 3 by a pin 15, and the sector 3 has a serrated lock on its outer circumferential surface, which has a fan shape formed by an arc centered on the axis of the pin 15. Teeth 3c are provided.

The operating lever 1 includes a main body 2 constituting its outer shell, and a main body 2.
It consists of a grip 5 attached to the head of the main body 2.
A brake cable 4 is connected to a protrusion 2a at the base of the brake cable 4.

A coil spring 6 is housed inside the grip 5, and the knob 7 protruding from the tip of the grip 5 is connected to the coil spring 6.
is constantly biased in the ejecting direction.

A claw body 8 is pivotally attached to the intermediate portion of the main body 2 by a pin 9, and a claw portion 8a to be engaged with the locking tooth 3C of the sector 3 is provided at one end of the claw body 8. The other end of the rod 10 screwed onto the knob 7 is pivoted to the other end 8b.

That is, the knob 7 constitutes a release operation body that is connected to the claw body 8 via the rod 10 and rotates the claw body 8 to a position where it is not engaged with the locking teeth 3C. .

A friction body 11 is attached to the claw body 8 according to the present invention.

The friction body 11 is an elastic body manufactured by bending a wire material, and its half is curved to draw an arc centered on the axis of the pin 9, and slides into contact with the saw-blade-shaped locking teeth 3c. It is configured like this.

The remaining parts of the friction body 11 are a groove 8c and a groove 8c carved in the middle between the end 8b of the claw body and its pivot (pin 9).
It is molded into a shape that can be engaged with a through hole 8d provided at the bottom of the groove, and is integrally attached to the claw body 8 (see FIG. 2).

Incidentally, since the claw body 8 is attached close to the main body 2, the friction body 11 will not fall off from the groove 8c.

The friction body 11 is attached while being elastically deformed by a certain amount, but since the contact point P with respect to the sector 3 is selected on the straight line connecting the axes of the pins 9 and 15, its restoring force The rotational force generated in the claw body 8 is almost negligible.

Note that S is a stopper projection, which is formed by bending a part of the main body 2 in order to define the limit of rotation of the claw body 8 in the clockwise direction (in FIG. 1).

When performing the tightening operation of the operating device configured as above,
When the grip 5 of the operating lever 1 in the state shown in FIG. 1 is grasped and rotated by a predetermined angle around the pin 15, the cable 4 is tightened by a predetermined length and the parking brake is activated.

At the same time, the curved portion of the friction body 11 slides on the locking tooth 3c, so a relatively large frictional resistance is generated between the two.

This frictional resistance F is in the direction in which the pawl 8a engaged with the locking tooth 3C is disengaged from the locking tooth (clockwise direction in FIG. 1).
A rotational moment of 1 is applied to the friction body 11.

Since the magnitude of this rotational moment is set larger than the rotational moment of the claw body 8 caused by the coil spring 6, the claw portion 8a resists the biasing force of the coil spring 6, as shown in FIG. and separates from the locking tooth 3C, and the locking tooth 3C
Move without sliding into contact with the object.

Therefore, the noise that conventionally occurred between the two does not occur at all.

Moreover, the frictional resistance F acts in the direction only during the tightening operation of the operating lever 1, and when the operating lever 1 attempts to rotate in the opposite direction, the frictional resistance F reverses and reverses. By generating a rotational moment around the periphery, the claw body 8 is rotated in the direction in which the claw portion 1a engages with the locking tooth 3c, and engagement between the claw portion 1a and the locking tooth 3C is permitted. Therefore, the operating lever 1 is held at the brake tightening position.

Next, when trying to release the parking brake, grasp the grip 5, press the knob 7 with your thumb, push down the rod 10 against the elasticity of the coil spring 6, and move the pawl body 8 between the sector 3 and the friction body 11. It is rotated around the pin 9 against the frictional force of , thereby disengaging the claw portion 81 from the engagement.

In this state, when rotating the operating lever, use the claw i8.
Since a is completely separated from the locking tooth 3C, there is no place for noise to occur between the two.

Also, when the brake is rotated to release the brake, the frictional resistance F acts in the direction of engaging the claw portion 8a, but this is canceled out by the force of the thumb pushing down the knob 7, so that it does not interfere with the operation.

Next, a second embodiment of this study will be explained based on FIGS. 4 to 6.

The main difference between this embodiment and the previous embodiment lies in the structure of the friction body 12. The friction body 12 is made of an elastic body such as a spring steel strip and is formed into a substantially U-shape.
and is pivotally connected to the main body 2 by a spacer 13.

The claw body 8 is provided with a groove 8c having a width approximately equal to the width of the friction body 12.
are provided on both sides, and the friction body 12 is fitted into the groove 8c.

The space near the υ-shaped opening of the friction body 12 is widened, and a butt 14 made of wear-resistant plastic or the like is attached to the bar surface inside the opening, and the elastic force of the friction body 12 that sandwiches the sector 3 causes the sector 8 to be moved. Can be slid on both sides.

As shown in FIG. 6, which shows the operation process of the operating lever 1, the action of the friction body 12 is almost the same as that of the friction body 11 of the previous embodiment, but the state of paddle contact between the friction body and the sector is different. In the first embodiment, the contact between the metal wire and the metal teeth cannot be completely silent, and wear occurs, but in the second embodiment, the material of the pad 14 and the sector 3 Since it is possible to select the contact area, the width and plate thickness of the spring steel strip of the friction body over a wide range, it is easy to obtain an appropriate frictional resistance F, and this unique feature makes it possible to provide a highly durable and noiseless operating device. have an effect.

In the above description, the friction body 11 of the first embodiment uses an elastic body made of a wire rod, but an elastic body made of a spring steel strip or the like may also be used, and the friction body 12 of the second embodiment uses a U Although the leaf spring is shaped like a letter and has a structure in which it slides into contact with the side surface of the sector 3, it may have a structure in which it comes into sliding contact only on one side.

As described above, according to the parking brake operating device of the present invention, when the operating lever is rotated in the direction of operating the parking brake, the friction body causes the claw body to engage the tip claw and the sector. Since it is rotated in the direction of releasing the engagement with the teeth, the noise caused by the collision between the pawl body and the locking teeth is completely eliminated.

Moreover, when the operating lever begins to rotate in the opposite direction, the friction body generates a rotational moment in the opposite direction based on the frictional force with the sector, and engages the tip claw of the claw body with the locking tooth. The operating lever is held in that position, and when the release operating body is operated, the operating force causes the friction body to slide against the frictional force with the sector, causing the claw body to rotate, unlike conventional methods. The parking brake can be released by a similar release operation.

Therefore, while completely eliminating the unpleasant noise that occurs when the parking brake is applied, which could not be solved in the past, there is no operational burden, and the act of tightening the brake itself simultaneously acts to prevent noise. This has the effect of preventing the generation of noise that impairs driving comfort.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. FIG. 3 is an explanatory diagram of the operation of the embodiment shown in FIG. 1. 4 is a partially cutaway front view showing a second embodiment of the present invention, and FIG. 5 is a sectional view taken along line IV-IV in FIG. 4. FIG. 6 is a diagram corresponding to FIG. 3 for explaining the operation of the embodiment shown in FIG. 4. 1: Operation lever, 2: Main body, 3: Sector, 3c: Locking teeth, 4: Brake cable, 5: Grip, 6: Coil spring, 7: Knob, 8: Claw body, 8a two-claw portion, 9, 15:
bottle, 10: rod, 11, 12: friction body, 13: baser, 14: pad, F: friction resistance, S: stopper,
P: Contact point.

Claims (1)

[Claims for Utility Model Registration] An operating lever for operating a parking brake for a vehicle; a sector fixed to a vehicle body that pivotally supports the operating lever and has locking teeth on its outer peripheral surface; a pawl body that is pivotally mounted and is constantly applied with a biasing force in a direction in which the pawl portion at the tip engages with the locking tooth of the sector; a release operating body that rotates the lever to a position where it is not engaged with the locking tooth; and a release operating body that is integrally attached to the pawl body in a state that it can make sliding contact with the surface of the sector, and the operating lever that operates the parking brake. When the claw body is rotated in the direction, the distal end claw of the claw body generates a rotational moment in the direction of disengaging from the locking tooth due to the frictional force with the sector, and the claw body is rotated in the direction of the locking tooth. While rotating against the force, when the operating lever is rotated in the opposite direction, a rotational moment in the opposite direction is generated based on the frictional force with the sector, and the tip claw of the claw body is rotated. and a friction body that engages with the locking tooth and slides against the frictional force with the sector when the release operation body is operated, and allows rotation of the claw body. Parking brake operating device.