JP2000027913A - Brake system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent die development of rest on a disk rotor surface, and to reduce brake noise, abnormal sound judder and the like caused in operating a brake, in a disk brake system. SOLUTION: In a brake system wherein a caliper piston 4 is internally provided in a caliper body 3 arranged across a disk rotor 2, a braking metal 5 is provided on the front surface of the caliper piston 4 and the inside of the caliper body 3 which faces the caliper piston 4, and a brake lining material 6 is stuck on the entire contacting surface of the disk rotor 2. A round part is formed on the peripheral corner part of the front surface of the braking metal 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake system for a vehicle, for example.

[0002]

2. Description of the Related Art Conventionally, as a vehicle disk brake system, for example, JP-A-6-94057 and JP-A-7-190.
No. 114 generally employs a caliper body 52 such that a part of a disc rotor 51 made of cast iron or the like that rotates with wheels is interposed therebetween, as shown in FIG. And a movable and retractable carrier piston 53 provided inside the caliper body 52.
The brake lining member 55 is attached to the front surface of the disc rotor 51 and the caliper body 52 facing the caliper piston 53 via the back metal 54, and the caliper piston 53 is advanced by a braking operation, so that both surfaces of the disc rotor 51 A braking force is obtained by being sandwiched between the brake lining members 55.

[0003]

However, in the conventional structure as described above, the metal portion on the surface of the disk rotor 51 is directly exposed to the outside. When the brake lining material 55 comes into contact with the rust, a phenomenon such as brake noise, abnormal noise, and shudder (shake) is likely to occur during a brake operation.

Accordingly, the present invention provides a brake system using a caliper that prevents rust and the like from being generated on the disk rotor surface, and suppresses the generation of brake noise, abnormal noise, shudder, and the like during brake operation. Aim.

[0005]

In order to achieve the above object, the present invention provides a brake system in which a pressure member of a brake caliper is pressed against a contact portion of a disk rotor to obtain a braking force. A brake lining material was attached to the contact part.

As described above, by providing the brake lining material provided on the front surface of the caliper piston and the opposed portion thereof on the disk rotor side, the metal portion of the disk rotor surface is not directly exposed to the outside air. No rust is generated, and brake noise and the like can be suppressed. By the way, when the brake lining material is provided on the disk rotor side, the pasting area is about five times larger than when the brake lining material is provided on the front surface of the caliper piston or the opposed portion thereof, so that the life of the brake lining material is extended. If the thickness is to be the same as the conventional one, the thickness can be reduced to about 1/5 of the conventional one. For this reason, the apparatus can be made compact, and there is also a secondary effect that the offset amount e (FIG. 4) of the disk rotor formed to prevent interference between parts is reduced, which is advantageous in securing rigidity.

According to the second aspect of the present invention, the peripheral corner on the front side of the pressure-bonding member is chamfered. By chamfering the peripheral edge portion on the front side of the crimping member in this manner, when the crimping member is pressed against the contact portion of the disk rotor surface, generation of abnormal noise such as brake squeal can be suppressed. When such a chamfer is applied to the front side of the crimping member as in the prior art, for example, chamfering the peripheral edge of the brake lining material made of sintered metal reduces labor and cost. It was not practical.
On the other hand, if the lining material is provided on the disk rotor side as in the present invention, for example, the pressure-bonding member can be made of a metal material other than sintered metal, and the peripheral corner can be chamfered freely.

[0008]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an overall perspective view of a brake system according to the present invention, FIG. 2 is a partial cross-sectional view of a caliper portion, and FIG.

The brake system according to the present invention is conceived as an improved technique for a disk brake for a vehicle. In particular, by preventing rust of a disk rotor, it is possible to suppress brake noise, abnormal noise, and problems such as shudder during a brake operation. As a secondary effect, the offset amount of the disk rotor can be reduced, and the apparatus can be made compact.

That is, as shown in FIG. 1, a brake system 1 includes a disk rotor 2 made of cast iron or the like that rotates with wheels, and a caliper body 3 provided so as to sandwich a part of the disk rotor 2. The caliper body 3 has, as shown in FIG.
A caliper piston 4 that protrudes by the hydraulic pressure at the time of the brake operation and is immersed when the hydraulic pressure is weakened is provided, and a braking metal 5 as a crimping member is attached to the front surface of the caliper piston 4. A braking metal 5 as a crimping member also in the caliper body 3 at the position.
Is attached.

On the other hand, on the outer surface of the disk rotor 2,
A brake lining material 6 such as, for example, a sintered metal friction material is adhered over the entire area of the metal portion, including a portion where the brake metal 5 abuts when the caliper piston 4 advances, and the metal of the disk rotor 2 is formed in a conventional manner. The part is not exposed to the outside. Therefore, for example, even if the disk rotor 2 is exposed to sea breeze or the like in marine transportation or the like, there is no problem that the surface of the disk rotor 2 is rusted, and a brake sound or the like during a brake operation is suppressed.

By adhering the brake lining material 6 to the disk rotor 2 in this manner, the adhering area is increased to about five times the conventional area. Therefore, in order to keep the life of the brake lining material 6 at the same level as in the related art, it is theoretically possible to reduce the thickness of the brake lining material 6 to about 1/5.

The brake lining material 6
When the thickness of the disk rotor 2 is reduced, the caliper body 3 can be reduced in size and the device can be made compact, and at the same time, the offset e of the disk rotor 2 for preventing interference of the device can be reduced. This is advantageous in securing rigidity.

The brake metal 5 is made of a metal material other than the sintered metal. The shape of the brake metal 5 is formed by chamfering a peripheral corner of a circular portion on the front side as shown in FIG. are doing. With such a shape, when the brake metal 5 is pressed against the brake lining material 6, the contact is stable and the brake squeal can be suppressed. In addition, the brake 5 can be easily attached to and detached from the caliper piston 4 and the caliper body 3 in consideration of maintainability and the like.

Incidentally, when a brake lining material 55 of a sintered metal friction material is attached to the surface of the backing metal 54 (FIG. 4) as in the prior art, and when the brake lining material 55 is pressed, a rounded portion is formed at the peripheral corner. However, this is not practical due to the convenience of processing and the like, and such a configuration cannot be adopted.

As described above, according to the present invention, since the brake lining material 6 is provided on the disk rotor 2 side opposite to the conventional one, the rust prevention effect of the disk rotor 2 is enhanced, and the brake noise, abnormal noise, shudder and the like are reduced. Can be effectively suppressed, and the device can be made more compact.
It has advantages such as being advantageous in securing the rigidity of the disk rotor 2.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the brake lining material 6 may be adhered only to a portion where the brake metal 6 contacts.

[0018]

As described above, the brake system according to the present invention provides a brake system in which a pressure member of a brake caliper is pressed against a contact portion of a disk rotor to obtain a braking force. In addition, since the brake lining material is adhered, it is possible to prevent rust from being generated on the disk rotor surface, and it is possible to suppress problems such as brake noise and shudder. Further, since the thickness of the brake lining material can be reduced, the device can be made compact, and the offset amount of the disk rotor is reduced, which is advantageous in securing rigidity. Further, if the peripheral corner portion on the front side of the pressure-bonding member is chamfered as described in claim 2, when it is pressed against the contact portion of the disk rotor surface, generation of abnormal noise such as brake squeal is suppressed. Can be done.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a brake system according to the present invention.

FIG. 2 is a partial sectional view of a caliper portion;

3 (A) is a side view and FIG. 3 (B) is a front view.

FIG. 4 is a conventional diagram of a brake system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Brake system, 2 ... Disc rotor, 5 ... Brake money, 6 ... Brake lining material, r ... Round part.

Claims (2)

[Claims] 1. A brake system in which a pressure member of a brake caliper is pressed against a contact portion of a disk rotor to obtain a braking force, and a brake lining material is attached to the contact portion of the disk rotor. A brake system characterized in that: 2. The brake system according to claim 1, wherein a peripheral edge portion on a front side of the crimping member is chamfered.