JPS5922346Y2 - Brake noise prevention device for disc brakes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing unpleasant noise from occurring during braking in a disc brake.

A brake disc, particularly a brake disc, a pair of friction pads disposed on both sides of the brake disc, and ears protruding from both ends of each back metal of the friction pads to slide in the direction of the rotation axis of the brake disc. It consists of a fixed bracket that freely supports the brake caliper and a brake caliper that has a mechanism that presses the friction pad against both sides of the brake disk, and applies the braking torque that acts on the friction pad during braking through the ears of the back metal. In the case where the torque receiver provided on the bracket is directly supported on the surface, when the cause of the braking noise is investigated, it is found that the frictional vibration caused by the friction pad sliding against the brake disc is transmitted to the bracket. One of the reasons for this is that it resonates.

Therefore, in order to prevent the frictional vibrations of the friction pad from being transmitted to the bracket, an elastic member is interposed between the ear part of the pad back metal and the surface of the torque receiver of the bracket, and this elastic member allows the above-mentioned friction Devices designed to absorb vibrations have been proposed in the past, but with these devices, the elastic member must be formed separately from the friction pad and bracket, and the elastic member must be locked in a predetermined position. Therefore, it is necessary to provide a special locking means between the elastic member and the friction pad or bracket, so the structure of the disc brake is complicated, which increases the cost and makes it difficult to handle during assembly and inspection. was there.

The present invention has been proposed in view of the above, and it is an object of the present invention to provide a brake noise prevention device for the above-mentioned disk brake, which can eliminate all of the above-mentioned drawbacks of the conventional devices and has an extremely simple structure.

The present invention provides the above-mentioned type of disc brake.
The torque receiver of the bracket is characterized in that a slit L- is formed on the ear side of the friction pad back metal, which is substantially parallel to the surface.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The illustrated example is an automobile brake system,
A bracket B for supporting a brake caliper C is arranged adjacent to one side of a brake disc D that rotates together with a wheel (not shown).

This bracket) B is fixed to the vehicle body (not shown).

Bracket B has two arm parts 1, 1 that are lined up at a constant interval in the rotational direction of brake disc D, and the ends of these arms have an inverted U shape so as to straddle the outer circumference of brake disc D from side to side. It is bent (Figure 3).

Two pairs of rectangular guide rails 2, 2: 2' are arranged on opposing surfaces of these arm portions 1, 1 with a brake disk D in between.
, 2' are integrally protruded, and a pair of friction pads P disposed on both sides of the brake disk D,
Ear portions 3a protruding from both ends of each back metal 3 of P,
3a so that both friction pads P, P can slide in the direction of the axis of rotation of the brake disc D along the guide rails 2.2; 2', 2', respectively.

In addition, a flat torque receiving surface 1a is formed on the opposing surfaces of the bracket arm portions 1, 1, on which the tips of the ear portions 3a, 3a are slidably abutted, and as will be described later, during braking. Friction pad P.

The braking torque acting on P is received by the surface 1a via the ears 3a, 3a.

As shown in FIG. 2, a slit S substantially parallel to the surface 1a of the torque receiver is formed on the lower surface of the ear portion 3a of each back metal 3,
A portion 3b of each ear portion 3a on the distal side of the ring) S can be bent and deformed more or less elastically in the rotational direction of the brake disk D.

Further, support holes 4, 4 parallel to the rotational axis of the brake disk D are provided in the upper end portions of the both arm portions 1, 1, respectively.

The brake caliper C has first and second arm parts 50 and 52 that straddle both the friction pads P and P on the left and right sides, and the first arm part 5. A hydraulic cylinder 6 is formed in communication with a known brake mask cylinder (not shown) operated by a brake pedal, and a piston 7 that can press the back surface of one of the friction pads P is attached to the hydraulic cylinder 6, and an elastic seal ring 8 is provided therein. Slide together through.

On the other hand, the second arm portion 5□ is brought into contact with the back surface of the other friction pad P.

Further, the first arm portion 5 has a pair of ear portions 9.9 at both front and rear ends thereof.
, and there are sliding pins 10.1 parallel to the rotational axis of the brake disk D corresponding to the support holes 4, 4.
0 are fixed by pins 11 and 11, respectively, and these are slidably fitted into the support holes 4 and 4.

Note that 12 in the figure is a pad spring that prevents the friction pad P from moving blindly.

Next, to explain the operation of this embodiment, in FIG. 1, when pressure oil is supplied from a brake mask cylinder (not shown) to the hydraulic cylinder 6 by operating the brake pedal, the piston 7, which moves forward due to the oil pressure, Pad P
is pressed against one side of the brake disc D, and at the same time, the reaction force causes the brake caliper C to press against the sliding pin 1.
0.10 is moved in the opposite direction to the piston 7 while sliding along the support holes 4, 4, and the second arm portion 52 pushes the other friction pad P to press it against the other side of the brake disk D. As a result of the above, the friction pads P and P rub equally on both sides of the brake disc D to stop its rotation.

During this braking, both friction pads P,
The braking torque acting on P is transmitted to and supported by the brackets 1 to B via the ears 3a of each back plate 3.

When each friction pad P generates frictional vibrations due to sliding contact with the brake disc D, the vibrations try to be transmitted to the bracket B via the ear portions 3a, but at that time, the slits S of the ear portions 3a The portion 3b closer to the tip side is more or less elastically bent and deformed in the direction of rotation of the brake disc D, and can effectively absorb and attenuate the frictional vibrations of the friction pad P. By significantly reducing the frictional vibrations transmitted to the bracket B, it is possible to suppress the occurrence of a resonance phenomenon in the bracket B.

As described above, according to the present invention, the braking torque acting on the friction pad P during braking is transmitted through the ears 3a protruding from both ends of the friction pad back plate 3, and the torque receiver of the bracket B is directly supported on the surface 1a. In this disc brake, since the torque receiver is formed with a sling (S) substantially parallel to the surface 1a on one side of the ear portion 3a, the frictional vibrations of the friction pad P are transmitted to the ear portion 3a of the back plate 3 during braking. , the portion 3b of the ear portion 3a, which is closer to the tip than the sulin S, is more or less elastically bent and deformed in the rotational direction of the brake disc D, thereby effectively suppressing the frictional vibration of the friction pad P. Therefore, the vibration from the friction pad P that is ultimately transmitted to the bracket) B is significantly reduced, suppressing the occurrence of the resonance phenomenon of the bracket) B, and suppressing the occurrence of the resonance phenomenon caused by the resonance phenomenon. It is possible to prevent the occurrence of brake noise.

Moreover, the structure of the device of the present invention is extremely simple, simply forming the slit S as described above in the ear portion 3a of the pad back metal 3, so that the ear portion and the torque receiver are flush with each other as in the conventional device. There is no need to specially insert an elastic member between the brakes, the number of parts is small, and it can significantly contribute to reducing costs and improving ease of assembly, and it is also easy to apply to existing disc brakes. It is something.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a disc brake equipped with the device of the present invention, and FIGS. 2 and 3 are sectional views taken along lines II-II and III-III in FIG. B...Bracket, C...Brake caliper D...Brake disc, P...
・Friction pad, 1a...Torque receiver is surface, 3...
...Backing metal, 3a...Ear part, S...
slit.

Claims (1)

[Scope of utility model registration request] A brake disk D, a pair of friction pads P disposed on both sides of the brake disk D, and ears 3a protruding from both ends of each back metal 3 of the friction pads P in the direction of the rotational axis of the brake disk D. A brake caliper C has a mechanism for pressing the friction pad P against both sides of the brake disc D, and a braking torque that acts on the friction pad P during braking. In a disc brake in which the torque receiver provided on the bracket B is supported directly on the surface 1a via the ear portion 3a of the back metal 3, the torque receiver is mounted on one side of the ear portion 3a, and the torque receiver is directly supported on the surface 1a. A brake noise prevention device for a disc brake, characterized in that a slit S is formed substantially parallel to the slit S.