JP2583951Y2 - Tool for adjusting the vehicle's brake gap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for adjusting a brake gap of a wheel cylinder with manual adjustment of a brake gap.

[0002]

2. Description of the Related Art When a drum brake is used as a vehicle brake, a clearance between a drum and a lining (hereinafter referred to as a brake gap) increases due to abrasion of the lining. It has an adjusting device.

FIG. 2 is a front view of an oil brake used for a drum brake. In FIG. 2, 60
Is a wheel cylinder, 20 is a wheel cylinder mounting plate,
80 is a brake shoe, 90 is a lining attached to the brake shoe, and 100 is a return spring.

The oil brake is attached to the brake drum through mounting holes 71 to 74 through a vehicle hole 70 and has a predetermined brake gap with the inner diameter of a brake drum (not shown) mounted on the vehicle, the outer peripheral portion of the lining 90, and the like. Built-in. Since the brake gap increases due to the wear of the lining 90, the wheel cylinder 60 has a built-in brake gap manual adjustment device.

FIG. 3 is a sectional view of a wheel cylinder 60 used for the oil brake. In FIG. 3, reference numeral 61 denotes a wheel cylinder body, 62 denotes a piston, 63 denotes a brake gap adjusting gear, 64 denotes a screw, 65 denotes a piston cup, and 66 denotes a spring.

The piston 62 is expanded by hydraulic pressure, and the end 64a of the screw 64 presses the end 80a of the brake shoe 80 to expand the brake shoe 80.

[0007] FIG. 4 (A) a front view of a mounting plate 20 for mounting the host yl cylinder 60, C in FIG. 4 (B) FIG. 4 (A)
It is -C sectional drawing. In FIG. 4A, reference numerals 21 to 28 denote holes for the wheel cylinder mounting plate, and reference numeral 20b denotes a brake gap adjusting hole mounted on the wheel cylinder 60. Numeral 70 denotes axle holes 71 to 74 for attaching the brake shown in FIG. 2 to the vehicle.

In FIG. 4B, a brake gap adjusting hole 20b is formed as an elongated hole perpendicular to the wheel cylinder mounting plate 20.

In FIG. 3, the piston 62 has a brake gap adjusting gear 63 fitted in an inner diameter portion 62a thereof by loose fitting, and a screw 64 is screwed into the inner diameter portion 63a. The end 64a of the screw 64 is in contact with the brake shoe 80 shown in FIG. Therefore, by rotating the brake gap adjusting gear 63, the screw 64 protrudes and the brake shoe 80 is expanded.

In order to rotate the brake gap adjusting gear 63, a driver or a thin round bar is inserted through the brake gap adjusting hole 20b shown in FIG. 4B to adjust the brake gap.

[0011]

[Problems to be solved by the invention]

Since the hole 20b for adjusting the brake gap provided on the wheel cylinder mounting plate 20 is small, when a driver or a thin rod is inserted, the groove 63a of the gear 63 for adjusting the brake gap cannot be seen. Therefore, there is a problem that it takes time to adjust the brake gap.

Further, since a driver or a thin rod used as an adjusting tool has no place as a fulcrum for rotating the brake gap adjusting gear 63, even if the tool is hit with a hammer or the like, the brake gap adjusting gear can be used. There is a problem that the tool is easily detached from the tooth groove 63a and labor is required.

This invention is a tool used only for a vehicle brake having a wheel gap adjusting gear 63 in a wheel cylinder 60 as means for solving the above-mentioned problem. large insertion portion of the braking gap adjustment holes 20b of the mounting plate 20 than the thickness of the foil cylinder mount plate 20
The round bar tip conical maximum diameter than the diameter 30b in width 30d, is that is that the stepped.

[0015]

The small diameter 30b of the brake gap adjusting tool 30, that is, the stepped shoulder portion 30c is applied to the shoulder portion 20c of the brake gap adjusting hole 20b of the wheel cylinder 20 to guide the brake gap adjusting tool 30 and adjust the brake gap. By moving the tool 30 up and down, the tooth gap 63a of the brake gap adjusting gear 63 is
Rotational force is applied to b, and the brake gap adjusting gear 63 rotates, the screw 64 protrudes, the brake shoe 80 is expanded, and the brake gap is adjusted.

FIG. 1 is a front view showing an operation state at the time of adjusting a brake gap. In FIG. 1, 20a is one end surface of the wheel cylinder mounting plate 20, 20c is a shoulder of the brake gap adjusting hole 20b, 63a is a tooth bottom of the brake gap adjusting gear 63, 63b is a tooth surface, and 30 is a brake gap adjusting. Tool with a conical tip 30
a. This conical portion is formed in a range slightly shorter than the length of one end surface 20a of the wheel cylinder mounting plate 20 from the tooth bottom 63a of the brake gap adjusting gear 63, and the hole 20b of the wheel cylinder mounting plate 20 is inserted.
The input part is larger than the thickness of the wheel cylinder mounting plate (20).
With a narrow width, a diameter (30b) smaller than the maximum diameter of the cone
It is formed in a ball step .

In the brake gap adjusting tool constructed as described above, the shoulder 20c of the hole 20b of the oil cylinder mounting plate 20 and the small-diameter shoulder 30c of the brake gap adjusting tool 30 abut against each other, whereby the brake gap is adjusted. The tip of the adjusting tool 30 abuts against the tooth bottom of the brake gap adjusting gear 63, and the brake gap can be adjusted.

In this state, the brake gap adjusting tool 63 is vertically moved by using the shoulder 30c of the brake gap adjusting tool 30 as a fulcrum, whereby a torque is applied to the brake gap adjusting gear 63, and the brake gap is adjusted.

[0019]

According to the present invention, by forming a tool for adjusting the brake gap as described above, the tooth surface 63b and the tooth bottom 63a of the gear 63 for adjusting the brake gap can be visually confirmed, and the operation of hitting with a hammer or the like can be performed. Therefore, the working time is short, that is, the number of man-hours is reduced, and the labor is reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an operating state according to an embodiment of the present invention.

FIG. 2 is a front view of an oil brake used for a drum brake.

FIG. 3 is a sectional view of a wheel cylinder used for an oil brake.

[4] (A) is a front view of a mounting plate for mounting the wheel cylinder. (B) is a CC sectional view of (A) . (

Claims (1)

(57) [Scope of request for utility model registration] A brake gap adjusting tool used for a vehicle brake having a wheel cylinder (60) mounted on a wheel cylinder mounting plate (20) and a brake gap adjusting gear (63) on the wheel cylinder, comprising: the previously end formed into a conical shape (30a), said round the insertion portion of the braking gap adjusting hole (20b) at a greater width than the thickness of the foil cylinder mounting plate (20) (30d)
A tool for adjusting a brake gap of a vehicle, wherein the diameter of the rod is smaller than the maximum diameter of the conical shape of the rod (30b).