JPH0122984Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a device for preventing the generation of abnormal noise in a disc brake, and particularly to a device that can effectively prevent the generation of grunting noise.

(B) Prior art and its problems In automobiles and motorcycles equipped with disc brakes, when the brakes are operated to stop the vehicle and then move forward or backward again, the disc brake may cause low-frequency vibrations at the initial stage, that is, at low speed. , it may produce an unpleasant grunting sound.

In order to prevent various noises that occur when disc brakes are braking or not, a spring is placed across the rotor between the back metals of a pair of opposing brake pads, as disclosed in the patent of this applicant, for example. This is well known from Japanese Patent Publication No. 50-28584.

The abnormal noise generation prevention device described in the above-mentioned patent publication uses a pressing spring having an M-shape to apply elasticity so as to open the rotor rotation side of the opposing pads, and also to apply elasticity to each pad so as to open the rotor rotation side. It is designed to press toward the exit side to prevent various abnormal noises from occurring.

However, the above-mentioned device cannot prevent the generation of the above-mentioned grunting sound.

(c) Means for solving the problems The purpose of this invention is to provide a device that prevents the generation of groun noises and also prevents the generation of abnormal noises such as rattle sounds and cronk sounds.

In order to achieve the above object, this invention is constructed as follows.

a. Insert support pins into the ears protruding from the upper edges of the back metals of the pair of opposing brake pads on the rotor rotation side and rotor rotation side, respectively.

b A V-shaped bent portion that engages the pad pressing spring with the lower surface of the insertion-side support pin, and support pin engagement portions formed in sequence at both ends of the V-shaped bent portion extending toward the extraction-side support pin. It is formed by the ear piece engaging part.

c. The support pin engaging portion is formed in a shape that extends half a circle outward from the upper surface of the retraction side support pin, engages with the upper surface of the support pin, and expands outward at a required angle with the end of the V-shaped bent portion.

d. Bend the lug engaging part into a U-shape that engages with the rising part of the inner surface of the output side lug and its back surface.

With the above configuration, it is possible to apply a large expansion force to the rotor rotation side of the brake pad, and also to apply a required expansion force to the rotation rotation side.
Furthermore, by pressing the brake pads in a certain direction, various abnormal noises including gurgling noises can be prevented.

(d) Embodiment The disc brake shown in the attached drawings is an opposed type in which the cylinder parts 1 and 1' are provided on both sides of the rotor. It's now possible to pull it out.

As shown in Figure 5, each pad 3 is located on the rotor rotation side of the upper edge of the back plate 4 (however, when the vehicle is moving forward, the same applies hereinafter).
and the rotor rotation side (however, when the vehicle is moving forward, the same applies below)
Lug pieces 5, 5' are provided protrudingly from the ends of the pads, respectively, and pad support pins 6, 6' are inserted between the opposing lug pieces 5, 5'. Each pad support pin 6, 6' is engaged with the caliper 2.

As shown in FIG. 2, the pad pressing spring 7 that applies a pressing force to each of the pads 3 is engaged with a V-shaped bent portion 8, a support pin engaging portion 9 formed in turn at both ends thereof, and an ear piece. It consists of part 10.

In its natural state, the V-shaped bent portion 8 is wide open to both sides, as shown by the chain line in FIG. 2, but when it is assembled, it becomes narrower, as shown by the solid line, and exerts elastic force outward. As shown in FIGS. 4 and 5, the tip of this V-shaped bent portion 8 is engaged with the lower surface of the pad support pin 6 on the rotor insertion side.

As shown in FIGS. 3 to 5, the support pin engaging portion 9 engages with the pad support pin 6 on the rotor rotation side by going about half a turn outward from the top surface of the pad support pin 6, and then goes back and engages with the pad support pin 6 on the rotation side of the rotor. extending to the side. As can be clearly seen in FIGS. 2 and 4, the portion 11 extending toward the insertion side widens outward from both ends of the V-shaped bend by a required angle α. This angle α is slightly smaller than the angle in the natural state, and an outward elastic force is exerted.

Therefore, the elastic force of the V-shaped bent portion 8 and the elastic force of the portion 11 of the support pin engaging portion 9 are combined to act on the pad 3 so as to press and spread its opposing surface. These elastic forces are applied to the ear piece 5 on the output side
As a result, an expansion force F acts on the protrusion side, but this force is applied to two parts (V-shaped bent part 8) as described above.
and the elastic force of portion 11) are added together, so the elastic force is quite large. Therefore, the spreading force F' also acts on the pronation side. This expansion force F' is smaller than the expansion force F on the rotation side, but in order to prevent the occurrence of abnormal noise due to interference with the rotating rotor, in other words, in the prior art mentioned above, the expansion force on the rotation side is It has the same effect as applying it to prevent the occurrence of abnormal noise. In the case of this invention, in addition to such spreading force F', an even larger spreading force F is applied to the output side.

Further, the above-mentioned ear piece engaging portion 10 is connected to the above-mentioned portion 1.
1, and is formed in a U-shape that protrudes outward from the V-shaped bent portion 8 so as to engage with the rising part of the inner surface 12 (FIG. 5) of the ear piece 5 and the back surface of the ear piece 5. ing.

In its natural state, the portion 11 is widened as shown by the chain line in FIG.
When the pad 3 is engaged with the ear piece 5 and the bent end of the V-shaped bent part 8 is engaged with the insertion side support pin 6', the pad 3 is compressed by an angle β, so a pressing force F ₁ is applied to the pad 3.
give. This pressing force F ₁ presses the pad 3 against the wall surface of the caliper 2, and also presses the pad 3 and its support pin 6 against the pad 3 and its support pin 6 by force along the wall surface, thereby eliminating rattling. This prevents abnormal noises such as rattle sounds and clanking sounds.

It should be noted that although it is not necessarily clear why the configuration of this invention can prevent the generation of groin sounds,
Experiments using the device in actual cars have shown that it is possible to prevent the generation of gurgling noises as well as other abnormal noises such as squealing, rattling, and cronking noises.

(e) Effects As described above, while this device conventionally applied an expanding force to the rotation side of the rotor, this device applies an expansion force to the rotation side and Since a certain degree of expansion force is also applied to the opening, it is effective in preventing the generation of gurgling sounds and other sounds.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a disc brake equipped with the device of this invention, Fig. 2 is a plan view of the pad pressing spring, Fig. 3 is a partially omitted sectional view of Fig. 1, and Fig. 4 is a partially omitted plan view. FIG. 5 is a sectional view of a portion along the pad. 1, 1'...Cylinder part, 2...Caliper, 3
...Pad, 4...Secret money, 5,5'...Ear piece, 6,
6'... Pad support pin, 7... Pad pressing spring, 8... V-shaped bent part, 9... Support pin engaging part, 10... Ledge engaging part, 11... Ear engaging part. Part 12...inner surface.

Claims (1)

[Scope of utility model registration request] In a noise prevention device for a disc brake that uses a pad pressing spring formed by bending an elastic metal wire between the back metals of a pair of opposing brake pads, the upper edge of the back metal has protrusions on the rotor retraction side and the rotor retraction side, respectively. The support pin is inserted into the provided ear piece, and the pad press spring is attached to the V-shaped bent part that engages the lower surface of the input-side support pin, and to both ends of the V-shaped bent part that extends toward the output-side support pin. formed by a support pin engaging portion and an ear piece engaging portion formed in sequence,
The support pin engaging portion is formed in a shape that extends half a circle outward from the upper surface of the retraction side support pin and engages with it, and expands outward at a required angle with the end of the V-shaped bent portion. An abnormal noise generation prevention device in a disc brake, in which an engaging portion is bent into a U-shape to engage with the inner rising portion of the retraction side lug and the back surface thereof.