JPS6249029A - Disc brake device for vehicle - Google Patents

Abstract

PURPOSE:To enhance the durability of a disc brake, by providing frictional members each constituting a brake pad, integrally with both surfaces of an annular disc section in a brake disc. CONSTITUTION:Frictional members 205, 206 for constituting pads are applied on and integrally incorporated with both surfaces 203, 204 of an annular disc section 201 in a brake disc 2 in a brake device 1. In this arrangement, they may be bonded with the use of an adhesive. Further, the disc section 201 is disposed between the outer surfaces 309a, 310a of abutting metals 309, 310 on the caliper 3. Accordingly, the degree of surface accuracy of the disc section is determined by the abutting metal corresponding to the caliper side pad, and therefore, it is not necessary to have a high degree of accuracy, thereby it is possible to enhance the durability of the brake device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disc brake device for a vehicle.

(Prior Art) A disc brake type brake system has been put into practical use as a vehicle brake system, and this type is composed of a brake disc on the wheel side and a brake caliper on the main body side. A brake caliper consists of a piston that is operated by hydraulic pressure and a brake pad, which is a friction member that is pressed by the piston.A metal brake disc part is placed between the brake pads, and the piston presses the brake pad, causing the brake disc to The brake is applied by squeezing the disc portion of the brake.

(Problems to be Solved by the Invention) In the above brake device, since the annular disc part of the brake disc is pressed between the pads, the parallelism and flatness of the disc part are highly required, and the brake A certain level of surface roughness is required for the sound and compatibility with the pad, and extremely high precision is required in manufacturing.The manufacturing is troublesome, complicated, and difficult, and the cost is high. The current situation is to match the above requirements.

In addition, the disc part rubs against the pad each time you brake, causing scratches on the surface, and since it is on the wheel side, there is a risk of moisture adhering to it and causing rust, so improvements can be made in terms of lifespan and durability. In addition, since braking is performed using pads with a small area, the pads wear out relatively quickly and must be replaced, so it is desirable to improve lifespan and durability in this respect as well. Even if the brake pads are used to apply pressure during braking, it is difficult to completely suppress vibrations because the discs are made entirely of metal, and it is difficult to completely suppress so-called brake squeal.

The present invention has been made to solve the above problems, and its objectives are to suppress accuracy to a certain level, be advantageous in manufacturing, advantageous in terms of cost, and have excellent longevity and durability. Furthermore, it is an object of the present invention to provide a disc brake device for a vehicle that is advantageous in terms of brake squeal noise prevention measures.

(Means for Solving the Problems) A means for solving the above problems is to integrally provide a friction material constituting a brake pad on both surfaces of the annular disc portion of the brake disc.

(Example) Fig. 1 is a longitudinal sectional view of a brake device (1) according to the present invention, where the brake consists of a brake disc (2) made of a steel plate and a brake gear 1 collar (3). It is attached and supported on the wheel side (not shown) (rotation side), has an annular disk part (201) in the peripheral part, and has a hub part (202) on the inner diameter side.
Arrive at 1F on the wheel side.

The brake caliper (3) includes a bridge part (302) at the top of the main body (301), and a dismounted support part (303) at the tip of the bridge part (302). Carrying part (303
) A cylinder (304) is integrally provided so as to face and be separated from the cylinder (300), and a hydraulic chamber (305) is located at the back of the cylinder (300).
is provided and connected to a hydraulic power source (not shown), ie, a master cylinder, via piping. A piston (30El) is slidably fitted into the cylinder (304), and the piston (30El) is slidably fitted into the cylinder (304).
) is a sealing O-ring, and (312) is a sealing member.

The piston (30El) has a hollow shape that is open to the front, with a closed proximal end surface (307) facing the hydraulic chamber and an open end edge (308).
) carries the braking reserve (309) on this side, and the main body (
A braking force (31) is attached to the supporting part (303) opposite to the
0) is carried, and the braking current (309), (310)
is made of metal or ceramic, and is now (3o9), (
The surfaces (309a) and (310a) of 3lo) may be formed of ceramic, and both surfaces (309a),
(310a) is a flat surface.

On the other hand, on both sides (203) and (204) of the annular disc portion (20L) of the brake disc (2) mentioned above, friction materials (205) and (20B) constituting a conventional pad are applied.
shall be affixed integrally over the entire surface. Such friction material (205
), (20B) are pasted on both sides of the disc part (201
) of the brake caliper (3) mentioned above (309)
, (310) surface (3osa).

(310a) Make it appear in between.

Disc part (201) of the above brake disc (2)
Friction material (205) on both sides (203) and (204).

(20B) is attached, fixed and integrated using adhesive (
207), or may be bonded with rivets (208) as shown in Figures 3 and 4. In the case of bonding with rivets (208), Friction material (2
05), (20B) have recesses (205a), (2
0Ela) and hole (205b).

C20Bb) is provided in the thickness direction, while the disk part (2
01) through the mounting hole (209), and insert the rivet (208
) from the hole of one friction material to the mounting hole (20B) and the hole of the other friction material, and swage one end of the rivet (208) to deform it, and then attach the friction materials (205) and (208). It binds to the disk part. A plurality of the above-mentioned rebate/joint parts are newly provided on the outer side and the inner side of the disk part.

In the above, the base end surface (30?) of the piston (306)
Operate the hydraulic pressure on the back, which causes the piston (30B)
moves forward, and Toima (3013) also moves to the left in Figure 1, and the disc part (309) and (310) move forward.
201) The surfaces of the friction materials (205) and (20B) on both sides are pressed together to perform braking.

(Effects of the Invention) As is clear from below-L, according to the present invention, first, since the friction material is integrally provided on the disc side, the surface accuracy of the disc part is improved by the pad equivalent to the pad on the caliper side. By simply increasing the surface accuracy of the small area of the pad, the disk part does not need to have the same high precision as in the past, making it easier to manufacture the disk, and the friction material surface is different from the conventional pad surface. The surface of the disk portion is wide, so the wear of the friction material is reduced, and the durability and lifespan are improved.In addition, since the surface of the disk portion is covered with the friction material, it is advantageous in terms of rust prevention.

Next, because the surface of the disc part of the disc is coated with different types of friction materials, the vibrations generated during braking are absorbed by the friction materials, providing good vibration isolation, and the padding corresponding to the pad side can be integrated with the piston side. Therefore, the rigidity of the conventional pad side is increased, and in addition to the above, so-called brake squeal prevention 1F can be achieved.

Furthermore, the friction material is provided on the rotating side, unlike in the past, and therefore effective cooling can be achieved, thermal deterioration of the friction material can be prevented, and further improvements in life and durability can be expected.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention: Figure 51 is a longitudinal sectional view of the brake device, Figure 2 is a longitudinal sectional view of the main part of the brake disc, and Figure 3 is the main part of another embodiment. Side view, 4th
The figure is a longitudinal sectional view of the same. In the drawings, (1) is the brake device, (2) is the brake disc, (201) is the disc part, (205), (20
B) is a friction material, and (30B) is a piston.

Claims (1)

[Claims] In a vehicle disc brake device consisting of a brake disc on the wheel side and a brake caliper that pinches the annular disc part of the disc from both sides with pistons, a friction material constituting a brake pad is integrated on both sides of the annular disc part of the brake disc. A disc brake device for a vehicle, characterized in that it is provided with a