JP3003025B2 - Manual adjustment device for gap between brake drum and brake shoe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual adjustment device for a gap between a brake drum and a brake shoe, and more particularly to a manual adjustment device for a gap between a brake drum and a brake shoe in which a stopper of a manual adjustment gear can be easily attached and detached.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional brake device including a manual adjustment device for a gap between a brake drum and a brake shoe.
Is a manual adjustment gear for manually adjusting the gap between the brake shoe (not shown) and the brake drum (not shown) provided on the body 3 of the wheel cylinder 4 for operating the brake shoe 2; An elastic plate-like stopper for preventing rotation of the gear 4.

In the conventional gap manual adjustment device as described above, the stopper 5 has its tip 6 brought into contact with the manual adjustment gear 4 as shown in FIGS.
Its base 7 is fixed to the body 3 of the wheel cylinder by bolts or screws 8.

As shown in FIG. 12, the screw 8 does not completely tighten the stopper 5 to the body 3 so that a clicking sound is generated when the gear is rotated. For example, the stopper 5 having a thickness of 1 mm is 1.1 mm. To form a boss 9 having a thickness of
The hole of the stopper 5 is inserted into the boss 9.

[0005]

As described above, in the conventional gap manual adjusting device, the stopper 5 is screwed into the body 3, and when the stopper 5 is removed for maintenance and attached, the screw is required each time. Work 8 must be loosened and removed or tightened, which is extremely troublesome, and has the drawback that the click sound is small and the operation state cannot be confirmed.

The present invention has been made to eliminate the above disadvantages.

[0007]

A device for manually adjusting the gap between a brake drum and a brake shoe according to the present invention comprises a gear for manually adjusting a gap between a brake drum and a brake shoe provided on a wheel cylinder, and a gear for manually adjusting the gap between the brake drum and the brake shoe. A stopper having a distal end in contact with the body and a base end engaged with an engaging portion formed in the body of the wheel cylinder having the manual adjustment gear, and mounting means for attaching the stopper to the body. ,
The stopper has a round hole at the center thereof, a long hole having a diameter smaller than the round hole extending in the distal direction from the stopper, and the mounting means has a head smaller in diameter than the round hole, and a smaller diameter than the head. A press-fit pin having a boss having a diameter larger than the long hole and a tip portion press-fitted into a hole formed in the body.

In addition, the manual adjustment device for the gap between the brake drum and the brake shoe of the present invention includes a gear for manually adjusting the gap between the brake drum and the brake shoe provided on the wheel cylinder, and a tip mounted on the manual adjustment gear for the gap. A stopper configured to engage the engaging portion formed on the body of the wheel cylinder having the manual adjustment gear with a base end thereof, and mounting means for attaching the stopper to the body. The center portion has a round hole and a long hole having a smaller diameter than the round hole extending in the distal direction from the center, and the mounting means includes a head having a smaller diameter than the round hole, and a long hole having a smaller diameter than the head. The screw has a larger diameter boss portion and a tip screw portion screwed into a screw hole formed in the body.

[0009] The base end of the stopper is bent, and the engaging portion formed in the body is a hole formed in the body to receive the base end or a recess integrally formed when the body is cast.

[0010]

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

In the present invention, as shown in FIGS. 1 to 5, the base end 10 of the stopper 5 is bent downward to form a round hole 11 in the center and a smaller diameter than the round hole 11 extending in the direction of the distal end 6 therefrom. A hole 13 for receiving the bent base end 10 and a pin hole 14 having a diameter smaller than the diameter of the long hole 12 are formed on the upper surface of the body 3, respectively. Instead of the screw 8, a head 15 having a diameter smaller than the round hole 11 of the stopper 5, a boss 16 having a diameter passing through the elongated hole 12, and a tip press-fit into a pin hole 14 formed in the body 3. A press-fit pin 18 having a portion 17 is used to attach the stopper 5 to the body 3.

Since the gap adjusting device of the present invention has the above-described structure, when inserting the stopper 5, the head 15 of the press-fit pin 18 is passed through the round hole 11 of the stopper 5 as shown in FIG. As shown in FIG. 7, the stopper 5 is pulled toward the base end 10 thereof, and the press-fit pin 1 is
8 and the stopper 5 is rotated clockwise around the press-fit pin 18 so that the base end 10 of the stopper 5 is bent as shown in FIGS.
Into the hole 13.

When removing the stopper 5 from the body 3, the base end 10 of the stopper 5 is
The stopper 5 is pulled to the tip 6 side while being slightly rotated counterclockwise around the press-fit pin 18, and pulled out from the head 15 of the press-fit pin 18 through the round hole 11. .

Incidentally, the press-fit pin in the above embodiment may of course be a screw as in the prior art.

In another embodiment of the present invention, the hole 3 is not provided in the body 3 of the wheel cylinder, and FIG.
As shown in FIG. 3, a horizontally extending recess 19 opening at the upper end face of the body 3 is integrally formed when the body 3 is cast.
The base 10 of the stopper 5 can be engaged in the recess 19.

According to this embodiment, there is no need to machine the hole 13 in the body 3.

[0017]

Since the device for manually adjusting the gap between the brake drum and the brake shoe of the present invention has the above-described configuration, the stopper 5 can be attached to and detached from the body 3 while the press-fit pin 18 is attached to the body 3. Is extremely simple and easy, and the press-fit pin 18
9 has a base end 10 extended from a central portion attached to the body 3 and fitted into the hole 13 or the recess 19 of the body 3, so that the click sound is amplified and can be clearly heard. When the manual adjustment gear 4 is rotated one tooth at a time by the driver 20 as shown in FIG.
There is a great advantage that the operation can be confirmed because it is transmitted to the operator via the.

[Brief description of the drawings]

FIG. 1 is a side view of a brake device including a gap manual adjustment device according to the present invention.

FIG. 2 is a longitudinal sectional side view of a main part of the gap manual adjustment device of the present invention.

FIG. 3 is a plan view of a main part of the device shown in FIG. 2;

FIG. 4 is an explanatory view of a body and a press-fit pin of a wheel cylinder in the manual gap adjusting device of the present invention.

FIG. 5 is a plan view of a stopper in the gap manual adjustment device of the present invention.

FIG. 6 is an explanatory diagram of mounting a stopper in the manual gap adjusting device of the present invention.

FIG. 7 is an explanatory view of mounting a stopper in the manual gap adjustment device of the present invention.

FIG. 8 is a plan view of a main part of a body in another embodiment of the present invention.

FIG. 9 is an explanatory diagram of a gear operation in the manual gap adjustment device of the present invention.

FIG. 10 is a side view of a brake device including a conventional gap manual adjustment device.

FIG. 11 is a longitudinal sectional side view of a main part of a conventional manual gap adjusting device.

FIG. 12 is an explanatory view of a screw in a conventional manual gap adjusting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back plate 2 Brake shoe 3 Body 4 Manual adjustment gear 5 Elastic plate stopper 6 Tip 7 Base 8 Screw 9 Boss 10 Base end 11 Round hole 12 Slot 13 Hole 14 Pin hole 15 Head 16 Boss 17 Tip 18 Press-fit pin 19 hollow 20 screwdriver

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16D 65/46

Claims (4)

(57) [Claims] 1. A manual adjustment gear for a gap between a brake drum and a brake shoe provided on a wheel cylinder, and a tip of the gear is brought into contact with the gap manual adjustment gear to form a wheel cylinder body having the manual adjustment gear. A stopper adapted to engage the base end thereof with the engaging portion, and mounting means for attaching the stopper to the body. A long hole with a smaller diameter, the mounting means, a head smaller in diameter than the round hole, a boss smaller in diameter than the head and larger in diameter than the long hole,
A manual adjustment device for a gap between a brake drum and a brake shoe, wherein the device is a press-fit pin having a tip portion press-fitted into a hole formed in the body. 2. A manual adjustment gear for a gap between a brake drum and a brake shoe provided on a wheel cylinder, and a tip of the gear is brought into contact with the gap manual adjustment gear to form a wheel cylinder body having the manual adjustment gear. A stopper adapted to engage the base end thereof with the engaged portion, and mounting means for attaching the stopper to the body, wherein the stopper has a round hole at a central portion thereof and the round hole extending in a distal direction therefrom. A long hole with a smaller diameter, the mounting means, a head smaller in diameter than the round hole, a boss smaller in diameter than the head and larger in diameter than the long hole,
A manual adjustment device for a gap between a brake drum and a brake shoe, wherein the screw has a tip screw portion screwed into a screw hole formed in the body. 3. The stopper according to claim 1, wherein a base end of the stopper is bent, and an engaging portion formed in the body is a hole formed in the body to receive the base end. The device for manually adjusting the gap between the brake drum and the brake shoe as described. 4. The stopper according to claim 1, wherein a base end of the stopper is bent, and an engaging portion formed in the body is a recess formed integrally with the body to receive the base end when the body is cast. 3. The device for manually adjusting a gap between a brake drum and a brake shoe according to claim 1.