JPH0611372Y2 - Brake pad shims - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a brake pad shim, and more particularly to a brake pad shim for preventing squeaking of a disc brake.

[Prior art and problems to be solved]

Generally, a disc brake using a shim for a brake pad is constructed as shown in FIGS. 3 and 4.

That is, inside the caliper 11, the disc rotor 12
Is located, the brake pad 13 is provided inside the disc rotor 12, and the brake pad 1 is provided outside the disc rotor 12.
4 are arranged so that the disk rotor 12 can be pressed.

The brake pad shim 1 is provided inside the brake pad 13 and outside the brake pad 14, respectively.
5 and 16 are provided and the inner brake pad shim 15 is provided.
A piston 17 is located on the outside, and an arm 18 of the clearer 11 is located on the outside brake pad shim 16.

Then, the piston 17 and the arm 18 are responsive to the filling state of the brake oil 19 via the both brake pad shims 15 and 16 to thereby provide the both brake pads 13 and 1 respectively.
4 can be pressed, and when both brake pads 13 and 14 are pressed, the rotation of the disc rotor 12 is stopped by them.

In the disc brake configured as described above, it is generally known that the brake pad shims 15 and 16 are made by adhering rubber to both sides of a steel plate. The loss coefficient, which is an index of the anti-squealing property at the time, was measured to be a level of 10 ⁻³ , which had a problem that the anti-squealing property at the time of pressing was not sufficiently satisfied.

This invention solves the above-mentioned problems of the conventional ones, and an object thereof is to provide a shim for a brake pad capable of satisfying the squeal prevention property.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is a brake pad shim that is provided between a brake pad located on a side surface of a disc rotor and a piston, and damps transmission of vibration of the brake pad to the piston. The shim for brake pad has a rubber portion integrally attached to the brake pad in a state where a sealed space is formed between the shim and the brake pad, and the sealed space has a predetermined width. A portion close to the disk rotor and a portion separated from each other are alternately connected at a portion having a predetermined width to form a continuous uneven shape, and a viscous fluid such as grease is sealed in the sealed space. It has the structure of being.

[Action]

This invention adopts the above-mentioned means, so that when the brake pad is pressed against the disc rotor, the vibration from the disc rotor is damped by the viscous fluid such as grease,
This will prevent stick-slip from occurring and prevent squeaking.

〔Example〕

 An embodiment of the present invention shown in the drawings will be described below.

1 and 2 show an embodiment of a brake pad shim according to the present invention.

Rubber part 4 which is the brake pad shim according to the present invention
Is formed by compression molding or the like, and the fitting portion with the brake pad 2 has a pedestal portion 7 which is erected upward except for the peripheral edge portion, and a protrusion extending in the width direction on the upper surface of the erected pedestal portion 7. A plurality of parts 8 are provided at predetermined intervals.

On the other hand, on the rubber portion 4 side of the brake pad 2, a plurality of recessed portions 3 are formed at predetermined intervals so as to match the base portion 7 and the protruding portion 8 of the rubber portion 4.

Then, the rubber portion 4 is provided in the recess 3 of the brake pad 2.
When the stand portion 7 and the protruding portion 8 of the rubber portion 4 are fitted, the peripheral portion of the rubber portion 4 is brought into close contact with the brake pad 2 and the rubber portion 4
The base portion 7 and the protruding portion 8 have a predetermined distance from the recess portion 3 of the brake pad 2, so that a sealed space 5 is formed between the brake pad 2 and the rubber portion 4. Has become. At this time, the shape of the sealed space 5 has a continuous uneven shape by alternately connecting a portion having a predetermined width close to the disk rotor 12 and a portion having a predetermined width spaced apart from each other. It's designed to be eggplant. Then, a viscous fluid such as grease 6 is enclosed in the sealed space 5.

The rubber portion 4, which is the brake pad shim fitted with the brake pad 2 as described above, is attached to the disc brake so that the brake pad 2 is on the disc rotor 12 side.

When the rotation of the disk rotor 12 is stopped, the brake pad 2 is pressed against the disk rotor 12 by pressing from the rubber portion 4 side. At this time, since the viscous fluid such as grease 6 is filled in the sealed space 5 formed between the brake pad 2 and the rubber portion 4, the vibration transmitted from the disc rotor 12 side is attenuated. . In this case, since the shape of the sealed space 5 is uneven, the contact area of the viscous fluid such as the grease 6 becomes large,
As a result, the vibration damping property is remarkably enhanced, stick-slip is prevented, and squeal is prevented. Moreover, since the sealed space 5 is formed in a continuous concave-convex shape by alternately connecting the portion close to the disc rotor 12 and the separated portion at a portion having a predetermined width, the brake pad is thus formed. 2 between the rubber portion 4 and the width direction,
And a predetermined space | interval will be formed in the direction orthogonal to it. Therefore, the grease 6 enclosed in the sealed space is
As a result, it is possible to suppress the vibration in the width direction and the direction orthogonal to the width direction.

[Effect of device]

As described above, this invention forms a sealed space between the brake pad and the shim for the brake pad, and the viscous fluid such as grease is enclosed in the sealed space to retain the viscous fluid for a long period of time. be able to. Therefore, the damping action of the viscous fluid can be maintained for a long period of time. In addition, the shape of the sealed space is formed by forming a concavo-convex shape in which a portion having a predetermined width close to the disk rotor and a portion having a predetermined width spaced apart are alternately connected by a portion having a predetermined width to form a concavo-convex shape. The viscous fluid enclosed in the void can damp vibrations in the width direction and the direction orthogonal to the width direction. As a result, there is an effect that the vibration damping property can be remarkably improved.

[Brief description of drawings]

1 and 2 show a brake pad shim according to the present invention, FIG. 1 is an overall view, and FIG. 2 is II-II of FIG.
The views as seen along the line, FIGS. 3 and 4, are schematic views showing a general disc brake. 15, 16 ... Brake pad shim 2, 13, 14 ... Brake pad 3 ... Recessed portion 4 ... Rubber portion (brake pad shim) 5 ... Sealed space 6 ... Grease 7 ... Stand portion 8 …… Projection 11 …… Caliper 12 …… Disk rotor 17 …… Piston 18 …… Arm 19 …… Brake fluid

Claims (1)

[Scope of utility model registration request] 1. A brake pad (2) provided on a side surface of a disc rotor (12) and a piston (17), wherein vibration of the brake pad (2) is generated by the piston (1).
Brake pad shim (4) for damping transmission to 7), said brake pad shim (4) forming a sealed space (5) with said brake pad (2) In this state, the rubber pad is integrally attached to the brake pad (2), and the sealed space (5) has a predetermined width and has a portion close to the disc rotor (12) and a portion separated from the disc rotor (12). A brake characterized in that it is formed into a continuous concavo-convex shape by alternately connecting portions having a predetermined width, and a viscous fluid such as grease (6) is enclosed in the sealed space (5). Shim for pad.