JP2000219123A - Vehicle braking system - Google Patents

Abstract

(57) [Summary] In a vehicle brake device, the slidability of a parking brake cable is always kept high with a simple and inexpensive configuration. SOLUTION: One end of a parking brake cable 34 is connected to a parking brake lever of the drum brake device. Parking brake cable 34
The parking brake cable 3 is formed in a tubular shape.
4 is guided to the outside of the backing plate 21 via a casing cap 35 through which the sliding member 4 is slidably inserted.
The casing cap 35 is in contact with the periphery of the through hole 21 a provided on the backing plate 21 on the outer surface of the backing plate 21 at a flange portion 35 a formed at one end thereof. The flange portion 35a has a through hole 2 protruding annularly around the parking brake cable 34.
A protruding wall 35c penetrating into 1a is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a vehicle which is mounted on a vehicle and used for braking the vehicle.

[0002]

2. Description of the Related Art Conventionally, as an apparatus of this kind, for example, as disclosed in Japanese Utility Model Laid-Open No. 28636/1985,
A backing plate that is fixed to the vehicle body and has a parking brake lever attached inside, and a parking that is guided from the outside of the backing plate through the through hole provided in the backing plate to the inside of the backing plate and the tip is connected to the parking brake lever A brake cable, and an introduction tube through which the parking brake cable is inserted and which penetrates the through hole of the backing plate and is fixed to the periphery of the through hole on the side surface thereof. It is well known that the angle of invasion is restricted.

[0005] As shown in FIGS. 5 to 7, in a brake device having a backing plate 11 and a parking brake cable 12 similar to the above, the parking brake cable 12 is inserted in place of the introduction cylinder and the backing plate 11 is inserted. In some cases, a tubular casing cap 13 is used, which is fixed on the outer surface of the base plate by contacting one end surface around the through hole 11a. In this case, on one end surface of the casing cap 13, first and second projecting portions 13a and 13b projecting toward the inside of the backing plate 11 and entering the through holes 11a of the backing plate 11 are provided, respectively. Part 13a,
13b allows the casing cap 13 to be easily positioned with respect to the through hole of the backing plate 11, and the first protrusion 13a regulates the angle of entry of the parking brake cable 12 into the backing plate 11. There were also things.

[0004]

However, in the conventional apparatus employing the above-mentioned introduction tube, the introduction tube must be fixed to the periphery of the through hole of the backing plate on the side surface, and the configuration is complicated. However, there was a problem that the cost was high. On the other hand, in the conventional device employing the casing cap provided with the first and second protrusions, since each protrusion only protrudes on one end surface of the casing cap, one end surface of the casing cap is provided. There was a problem that water penetrated into the casing cap from between the two protruding portions, and the inside of the casing cap was rusted, resulting in poor sliding of the parking brake cable.

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned problems, and an object of the present invention is to provide a vehicle brake device having a simple and inexpensive configuration and always maintaining a high sliding property of a parking brake cable. It is in.

[0006]

In order to achieve the above-mentioned object, a structural feature of the present invention is a brake device for a vehicle including the backing plate, a parking brake cable, and a casing cap. There is provided on one end surface a protruding wall which protrudes annularly around the parking brake cable and penetrates into a through hole provided in the backing plate.

[0007]

In the brake device for a vehicle having the structural features of the present invention described above, the casing cap is protruded simply by contacting and fixing the casing cap on one end face to the outer face of the backing plate. The wall makes it possible to easily position the casing cap with respect to the through hole of the backing plate, and to limit the angle of entry of the parking brake cable into the backing plate. Therefore, the configuration is simple,
The brake device of this vehicle can be kept cheap. Further, in this case, since the protruding wall is annularly protruding from one end surface of the casing cap fixed to the backing plate, the protruding wall enters the water casing cap that has been carried on one end surface of the casing cap by the protruding wall. Rust in the casing cap is prevented, and the slidability of the parking brake cable can always be kept good.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view illustrating the entirety of the vehicle brake device according to the embodiment.

This brake device includes a disk-shaped backing plate 21 fixed to a vehicle body. On the inner side (upper side of the paper) of the backing plate 21, first and second brake shoes 22, 23 are supported so as to be displaceable in the plane direction of the backing plate 21. Each of the brake shoes 22 and 23 is in contact with a piston (not shown) built in the wheel cylinder 24 at each upper end, and is in contact with an anchor 25 fixed to the backing plate 21 at each lower end. Each brake shoe 2
Liners 26 and 27 are pressed on the outer peripheral surfaces of the brake drums 2 and 23, respectively, and are pressed against a brake drum (not shown).

Below the wheel cylinder 24, struts 28 having both ends engaged with the upper portions of the respective brake shoes 22, 23 are provided. Each of the brake shoes 22 and 23 is urged by an upper shoe return spring 29 in a direction facing each other at an upper portion, and a lower shoe return spring 3 is pressed at each lower portion.
1 are urged in directions facing each other.

On the inner surface of the backing plate 21,
Parking brake lever 32 is also backing plate 2
1 is supported so as to be displaceable in the plane direction. The parking brake lever 32 is provided at the upper end with the first brake shoe 22.
The upper end of the strut 2 is rotatably supported via a pin 33, and the strut 2
8 is engaged with one end. One end of a parking brake cable 34 is connected to a lower end of the parking brake lever 32. Parking brake cable 3
4 is guided to the outside of the backing plate 21 through a casing cap 35 formed in a cylindrical shape and through which the parking brake cable 34 is slidably inserted, and a hand brake lever or a foot brake pedal (not shown) is provided at the other end. It is connected to the. A spring 36 is interposed between the lower end of the parking brake lever 32 and the casing cap 35 along the outer periphery of the parking brake cable 34. The spring 36 urges the lower end of the parking brake lever 32 and the parking brake cable 34 to the left in the drawing.

As shown in detail in FIGS. 2 to 4, the casing cap 35 has a flange 35a at one end. 2 and 3 respectively show the casing cap 3
5 and 6 are a side view and a longitudinal sectional view in a state where the casing cap 35 is assembled to the backing plate 21 of FIG. 5, and FIG. 4 is a plan view of the casing cap 35 itself viewed from above in FIGS. The flange portion 35a is in contact with the periphery of the through hole 21a provided on the backing plate 21 on the outer surface (the lower side in FIGS. 2 and 3) of the backing plate 21. A pair of female screws 35b, 35b
(See FIG. 4), and the flange portion 35a is fixed on the outer peripheral surface around the through hole 21a of the backing plate 21 by a bolt (not shown) screwed into each of the female screws 35b, 35b.

The flange portion 35a is provided with a protruding wall 35c which protrudes annularly around the parking brake cable 34 and penetrates into the through hole 21a. The outer periphery of the protruding wall 35c is formed in substantially the same shape as the through hole 21a, and the casing cap 35 is connected to the through hole 21a by the protruding wall 35c.
It can be easily positioned with respect to a. Also, an inclined surface is formed on the inner periphery of the protruding wall 35c (see FIG. 3), so that the angle of entry of the parking brake cable 34 from the outside to the inside of the backing plate 21 is restricted. As described above, in the present embodiment, the casing cap 35 is merely fixed by being brought into contact with the outer surface of the backing plate 21 at the flange portion 35a formed at one end thereof, and the casing cap 35 is formed by the protruding wall 35c. Since the positioning can be easily performed with respect to the through hole 21a and the angle of entry of the parking brake cable 34 into the backing plate 21 can be regulated, the configuration is simple and the drum brake device can be kept inexpensive. it can.

In the casing cap 35, a resin bush 35d through which the parking brake cable 34 penetrates, an annular seal rubber 35e, and an annular socket 35f into which the seal rubber 35e is inserted are fitted. The distal end of the outer cable 36 into which the parking brake cable 34 is slidably inserted penetrates and is fixed in the other end of the 35.

In the drum brake device for a vehicle constructed as described above, when the hand brake lever or the foot brake pedal is operated, the parking brake cable 34 slides in the outer cable 36 and the casing cap 35, respectively. In order to pull the lower end of the parking brake lever 32, the parking brake lever 32 first rotates counterclockwise in FIG. At this time, the strut 28 is pushed by the parking brake lever 32 to be displaced rightward in the figure, and the upper end of the second brake shoe 23 is pushed in the same direction by the strut 28. Rotate clockwise with the engaged lower end as a fulcrum,
A liner 27 is pressed against the brake drum. When the lower end of the parking brake lever 32 is further pulled from this state, the parking brake lever 32 rotates counterclockwise around the upper end engaged with the strut 28, and the pin 33 is moved by the upper end of the parking brake lever 32. The upper end of the first brake shoe 22 is pushed leftward through the first brake shoe 22, so that the first brake shoe 22 rotates clockwise around the pin 33 with respect to the parking brake lever 32 and engages with the anchor 25. Pivots counterclockwise around the fulcrum to press the liner 26 against the brake drum. The pressing of the respective liners 26 and 27 brakes the brake drum.

In the above case, the protruding wall 35c is attached to the casing cap 3 fixed to the backing plate 21.
Since it protrudes annularly on the flange portion 35a at one end of 5, the water that has passed through the flange portion 35a is prevented from entering the casing cap 35. As a result, rust inside the casing cap 35 is prevented, and the casing cap 35 of the parking brake cable 34 is prevented.
The slidability inside is always kept good.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a vehicle brake device according to an embodiment of the present invention.

FIG. 2 is a side view of the casing cap of FIG.

FIG. 3 is a vertical sectional view of the casing cap.

FIG. 4 is a plan view of the casing cap.

FIG. 5 is a side view of a casing cap of a conventional brake device.

FIG. 6 is a longitudinal sectional view of the conventional casing cap.

FIG. 7 is a plan view of the conventional casing cap.

[Explanation of symbols]

21: backing plate, 21a: through hole, 32: parking brake lever, 34: parking brake cable, 35: casing cap, 35a: flange portion, 35c: protruding wall.

Claims (1)

[Claims] A backing plate fixed to a vehicle body and having a parking brake lever assembled inside; a backing plate penetrating from the outside of the backing plate through a through-hole provided in the backing plate and guided to the inside of the backing plate; A parking brake cable connected to a parking brake lever, and a tubular casing cap through which the parking brake cable is inserted and which is fixed on the outer surface of the backing plate with one end abutting around the through hole. The vehicle brake device according to claim 1, further comprising: a protruding wall that protrudes annularly around the parking brake cable and penetrates into the through hole on one end surface of the casing cap.