JPH0616735U - Disc brake - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a disc brake capable of economically achieving both prevention of squeaking and suppression of squeaking. [Structure] A spacer 8 having an elastic pressurizing portion 8a between a torque receiving surface 3 and a friction pad 2 on the disk entry side during forward movement.
The pad 2 with the interposition of the
Since it is pressed against, there is no crawl noise. Further, since the vibration-damping coating 9 is provided on the surface of the spacer 8, the vibration transmitted from the pad to the caliper 1 via the spacer at the time of backward braking is damped, and squeaking hardly occurs.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, the friction pad is elastically pressed against the torque receiving surface of the caliper by the spring elastic spacer to prevent the crawl noise in the early stage of braking, and at the same time, to obtain the so-called squeaking suppression effect during reverse braking. This is related to the piston-opposed disc brake.

[0002]

[Prior art]

 Among existing piston-opposed disc brakes, there is one that uses an L-shaped spacer 8 as shown in FIG. 2 to prevent the crawl noise at the initial stage of braking.

The crawl noise is generated when the friction pad 2 dragged by the disk collides with either of the torque receiving surfaces 3 and 4 on both the turning-in side and the moving-out side of the disk D. The collision force of the pad at this time is larger during forward rotation, and therefore, in general, the spacer 8 is used to transfer the torque receiving surface 3 on the disc admission side during advancing and the disc admission side torque transmission of the friction pad. There is a method of interposing it between the surface 5 and the elastic pressing portion 8a of the spacer to press the pad 2 against the torque receiving surface 4 on the disk feeding side so as to eliminate the clear clearance between the surface 4 and the pad. I am collecting.

On the other hand, in a disc brake, a rubber coat shim is sandwiched between a piston and a pad as a measure against noise during braking.

[0005]

[Problems to be solved by the device]

 The spacer and the shim described above are separate parts. In conventional disc brakes, both parts are used to prevent clunking noise and to suppress squeaking, which is economically unfavorable.

[0006] In addition, the squeal prevention measures using shims often have insufficient squeal prevention during reverse braking.

Therefore, an object of the present invention is to economically achieve both prevention of cronks and squeaking during reverse braking.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a vibration-damping coating made of rubber or the like is provided on the surface of a clonk countermeasure spacer that elastically presses the pad against the torque receiving surface on the disk feeding side during forward movement.

[0009]

[Action]

 Pressing with the spacer eliminates the movement allowance of the pad in the disc forward rotation direction, so no crawl noise is generated.

Further, during reverse braking, the vibration of the pad, which causes squeal, is first transmitted to the spacer, and the vibration is transmitted to the caliper after being greatly attenuated by the damping coating, so that the resonance of the caliper is less likely to occur. , The excellent squeal suppression effect is exhibited.

[0011]

【Example】

 1 (a) and 1 (b) show an example of the disc brake of the present invention.

In the figure, 1 is a caliper of a piston-opposed disc brake, 2 is a friction pad opposed to each other with a disc D in between, 3 is a torque receiving surface provided on the caliper on the side of advancing disc when advancing, and 4 is also When moving forward, the torque receiving surface on the disk delivery side, 5 is the disk transmission side torque transmission surface of the friction pad provided on the back plate, 6 is the same disk delivery side torque transmission surface, and 7 is horizontally mounted in the window hole of the caliper. The pad pins 8 are spacers.

The friction pad 2 is slidably supported in a disc axial direction through a pad pin 7 in a hole of a back plate.

Further, the spacer 8 is supported by the pad pin by passing the pad pin through the pin hole 8b and pressing the elastic pressing portion 8a between the surfaces 3 and 5. The elastic pressing portion 8a is bent and extended between the surfaces 3 and 5, and the pad 2 is pressed against the torque receiving surface 4 on the disk feeding side by the elastic restoring force generated by the bending. The reaction force applied to the spacer 8 is received by the torque receiving surface 3 and the pad pin 7 in the figure, but the reaction force may be received only by the surface 4 if the shape of the elastically deforming portion is slightly changed. it can.

The spacer 8 is provided with a vibration damping coating 9 made of rubber or the like on the surface thereof, and the squeal at the time of backward braking is suppressed by the damping effect of the transmitted vibration energy by this coating.

It should be noted that the spacer 8 may be provided with a second elastic pressing portion that presses the pad inward in the disk radial direction. When a stationary spacer that does not move in the disc axial direction even when the pad is worn is used, a spacer for the inner pad and a spacer for the outer pad may be formed in series.

[0017]

[Effect of device]

 As described above, in the disc brake of the present invention, the vibration damping function is added to the spacer for preventing cronks so that the squealing effect at the time of reverse braking is also exhibited, so the shim is not an essential element. , Which is economically advantageous compared to the conventional one.

[Brief description of drawings]

FIG. 1A is a sectional view showing an embodiment of the present invention,
(B) is an exploded perspective view of the main part thereof

2A is a sectional view showing an example of a conventional disc brake, and FIG. 2B is a perspective view of a spacer.

[Explanation of symbols]

 1 caliper 2 friction pad 3 disc entry side torque receiving surface 4 disc entry side torque receiving surface 5 disc entry side torque transmission surface 6 disc entry side torque transmission surface 7 pad pin 8 spacer 8a elastic pressure portion 8b pin hole 9 Damping coating

Claims (1)

[Scope of utility model registration request] 1. A spacer having an elastic pressing portion is interposed between a torque receiving surface on the disk advancing side at the time of forward movement and a friction pad, and the spacer serves as a friction receiving pad on the torque receiving surface on the disk forward side at the time of forward movement. A disc brake of a piston facing type to be pressed against, wherein a coating for damping is provided on a surface of the spacer.