JPS5853254Y2 - parking brake - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a lever type parking brake.

A conventional device of this type is shown in FIG.

In the figure, a parking lever 1 is rotatably supported by a latent plate 2 via a support shaft 8.

The latent plate 2 is the floor of the vehicle body or the fixing member A
It is fixed to and has teeth 2-1 carved thereon.

The pawl 3 is supported by a pin 7 at its intermediate portion on the parking lever 1, and has one end connected to one end of the punch rod 5 and a pawl 3-1 provided at the other end.

The pawl 3-1 is formed in a shape suitable for meshing with the teeth 2-1 of the ratent plate.

A bushing button 4 is fixed to the other end of the push rod 5, and the button 4 releases the engagement between the pawl 3-1 and the teeth 2-1.

The return spring 6 is attached to the pawl 1- provided on the parking lever.
The push rod 5 is interposed between the push rod 1 and the push button 4, and acts to constantly push back the push rod 5 in the direction of the arrow T with a set spring force.

Therefore, the pawl 3 is constantly receiving a force in the direction of arrow F using the pin T as a fulcrum.

In addition, for the parking lever stopper mechanism, a protrusion 2-4 is provided on the latent plate 2, the back part 2-3 of the latent plate is used as a stopper, and a protrusion 2-5 is provided to prevent overstroke. We have set up some.

When the parking lever 1 is operated, the pawl pawl 3-1 overcomes the force in the F direction constantly applied by the return spring 6 and overcomes the tooth 2-1.

At this time, a tapping sound is generated between the claw 3-1 and the tooth 2-1, and the pawl 3 vibrates using the pin 7 as a support point, producing a dancing sound.

This is because the pawl 3-1 gets over the teeth 2-1 and because there is a gap 13 between the parking lever 1 and the pawl 3.

(See Figure 4) The sound is transmitted to the parking lever 1,
Lever 1 acted as a resonance box and amplified the sound, producing a loud and unpleasant sound.

In addition, the protrusion 2 is used as a parking lever stopper mechanism.
-4. Providing 2-5 or forming the back part 2-3 is difficult to stop the latent plate 20 and is disadvantageous in terms of cost.In the case of the back part 2-3, the parking lever 1 There was a problem that it deformed as shown in part B.

The purpose of this invention is to focus on the above points and provide a structure that can reduce the noise generated when operating the parking lever and regulate the stroke of the parking lever without providing a protrusion on the latent plate. This is a pin whose ends are supported on both sides of the parking lever and fitted with a collar, and a pin formed in an arc shape into which the pin is inserted into the latent plate centering on the support axis of the parking lever. It is equipped with a guide hole through which the strobe of the parking lever is regulated.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a longitudinal sectional view showing an embodiment of the parking brake according to the present invention, and FIG. 3 is a sectional view taken along the line a-a in FIG. 2.

In the figure, numerals 1 to 8 indicate the same members as in FIG. 1.

The present invention eliminates the protrusion 2-4 or back portion 2-3 and protrusion 2-5 of the latent plate shown in the conventional device, and also provides the following members.

Reference numeral 9 denotes a pin, and the parking lever 1 has a U-shaped cross section except for the button 4 side, and as shown in FIG. fixed to the surface.

10 is a collar, which is fitted into the pin 9.

Reference numeral 2-2 denotes a guide hole, which is formed in an arc shape centered on the axis of the support shaft 8 of the parking lever of the latent plate 1, into which the pin 9 is inserted.

By appropriately setting the length, the stroke of the parking lever 1 can be regulated via the pin 9.

That is, the lower end of the guide hole 2-2 regulates the position when the parking lever 1 is released, and the upper end regulates the overstroke prevention position when the lever is operated.

When the pin 9 acts as a stopper when the parking lever 1 is released, the pin 9 and the latent plate 2 come into metal-to-metal contact, so the collar 10 is fitted onto the pin 9 in order to soften the hitting sound at the time of contact. are combined.

The material of the collar 10 is preferably rubber, resin, aluminum, copper, or the like.

In the case of the above configuration, since the opening of the parking lever 1 is connected by the pin 9, the rigidity is improved and the chattering and drumming effect of the parking lever are eliminated.
It has the effect of preventing resonance and amplification of the sound generated when operating the parking lever, reducing the noise generated.

In addition, the pin and guide hole have the effect of setting the position when the parking lever is released and preventing overstroke during operation, improving the stopping power compared to conventional ones.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a conventional parking brake, Figure 2 is a sectional view showing a conventional parking brake.
The figure is a cross-sectional view showing an embodiment of the device according to the present invention, FIG. 3 is a cross-sectional view taken along arrow B-a in FIG. 2, and FIG.
B is a sectional view taken along arrow b. 1...Parking lever, 2...Ratient fly), 2-1...Teeth, 2-2...
... Guide hole, 3... Paul, 3-1...
...Claw, 4...Chinese button, 5...
...Punschrod, 6...Return spring, 7゜9
...Pin, 8...Support shaft, 10...
···Color.

Claims (1)

[Scope of utility model registration request] A latent plate fixed to the vehicle body and carved with teeth, a parking lever with a U-shaped cross section rotatably supported on the support shaft of the same latent plate, and a bushing on one end housed in the parking lever. A spring is interposed between the button and the parking lever, the other end of which is connected to one end of a pawl pivotally supported by the parking lever, and the claw on the other end of the pawl is connected to the teeth of the latent plate. In a parking lever kini having a punch wand that is engaged by spring pressure, a pin having both ends fixed to both sides of the parking lever and fitted with a collar, and a pin fitted with a collar on both sides of the parking lever, and a pin mounted on the ratent plate centered on the support axis of the parking lever. A parking brake characterized by comprising a guide hole formed in an arc shape into which the pin is inserted and which regulates the stroke of the parking lever through the pin.