JPH0543302Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating body of a vehicle brake device, such as a drum or a disc rotor, which rotates together with a wheel.

[Conventional technology]

As a type of vehicle braking device, for example, the disc brake disclosed in Japanese Utility Model Application No. 54-108880 performs a braking action by sliding friction pads on a disc rotor that rotates together with the wheel.
The disc rotor is provided with a large number of holes perpendicular to the braking surface at irregular intervals in the circumferential direction to reduce the weight of the rotor and improve heat dissipation.

[The problem that the idea attempts to solve]

By the way, during braking in vehicle brake systems, the organic substances in the lining are carbonized due to the braking heat caused by the sliding contact between rotating bodies such as drums and disc rotors and lining members such as brake shoes and friction pads, causing carbonization on the lining surface. This increases the attack on the rotating body and forms a thin carbonized film, which reduces braking force and causes squealing during braking.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rotating body for a vehicle brake system that stabilizes braking force by removing welding and carbonized films caused by abrasion particles on the surface of a lining member.

[Means for solving the problems]

In order to achieve the above object, the present invention provides a brake system for a vehicle in which a lining member such as a brake shoe or a friction pad is brought into sliding contact with a rotating body such as a drum or a disc rotor that rotates integrally with a wheel to perform a braking action. The present invention is characterized in that a recess is formed on the sliding surface of the rotating body, and a ceramic layer is provided on the edge of the recess.

[Effect]

With this structure, it has better heat resistance, corrosion resistance, and
The ceramic layer with excellent wear resistance scrapes away welding and carbonized films caused by abrasion particles on the surface of the lining member, allowing the rotating body and lining member to maintain their original appearance for a long period of time, extending their service life. Can be done.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a disc rotor of a disc brake will be described based on the drawings.

1 and 2 show a first embodiment of the present invention, in which a disc rotor 1 has a sliding surface 1a.
A plurality of small holes 2 are perpendicularly perpendicular to the sliding surface 1b, and the edges of the small holes 2 are chamfered to have recesses 2a and 2b with a diameter larger than that of the small holes 2. A ceramic layer 3 is formed in the recesses 2a and 2b.
are provided by thermal spraying at substantially the same diameter as the diameter of the small hole 2.

As a result, it is possible to reduce the weight of the disc rotor 1 and improve its heat dissipation performance, and at the same time, it is possible to prevent welding due to abrasion powder or to form a carbonized film on the surface of the friction pad (not shown) that makes sliding contact with the sliding surfaces 1a and 1b of the disc rotor 1. However, the ceramic layer 3, which has better heat resistance, corrosion resistance, and wear resistance than the base material, is scraped off and cleans the surface of the friction pad for a long period of time, reducing the attack on the disk rotor 1. Not only is the knockback reduced and the braking force stabilized,
Squeal during braking can be prevented, the rotating body and lining members can maintain their original appearance for a long period of time, and their service life can be extended.

In addition, as in the second embodiment shown in FIG.
By welding them to a and 2b, the edges of the ceramic ring 4 come into contact with the surface of the friction pad at an acute angle, so that cleaning of the surface of the friction pad can be improved more than in the previous embodiment. .

4 and 5, a plurality of concave grooves 6 are formed in the sliding surfaces 5a, 5b of the disc rotor 5 in the radial direction of the disc rotor 5, and edges 6a, 6b on both sides of the grooves 6 are formed. This shows a third embodiment in which the ceramic layer 7 is formed by thermal spraying, and has the same functions and effects as both of the above embodiments.

Furthermore, a plurality of recessed holes may be formed in the sliding contact surface of the disc rotor, and a ceramic layer may be provided on the edges of the recessed holes.Furthermore, recessed portions such as recessed holes or grooves may be formed in the sliding contact surface of the brake drum. Even if a ceramic layer is provided on the rim of the mouth, similar functions and effects can be obtained.

[Effect of idea]

As described above, the present invention provides a plurality of recesses on the sliding surface of a rotating body such as a drum or disk rotor that rotates together with the wheel, and a ceramic layer is provided on the edge of the recess. Even if welding due to abrasion powder or a carbonized film forms on the surface of lining parts such as brake shoes and friction pads that come into sliding contact with the sliding surface, the ceramic layer has better heat resistance, corrosion resistance, and wear resistance than the base material. Since the cleaning of the lining member surface reduces the wear of the ceramic layer and prevents the occurrence of rust, the lining member surface can be reliably cleaned for a long time, reducing attacks on the rotating body, and improving braking force. In addition to stabilizing the brake system, it is possible to prevent squealing during braking, and the rotating body and lining member can maintain their initial appearance for a long period of time, extending their service life.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a front view of a disc rotor, and FIG.
The figure is a cross-sectional view of the disk rotor shown in FIG. 1, FIG. 3 is a cross-sectional view of the disk rotor showing the second embodiment, FIG. - It is a cross-sectional view. 1, 5...disc rotor, 1a, 1b, 5
a, 5b...Sliding surface, 2...Small hole, 2a, 2b...
... Concavity of small hole, 3,7... Ceramic layer, 4...
Ceramic ring, 6...Groove, 6a, 6b...Edge of the groove.

Claims (1)

[Scope of utility model registration request] In a vehicle brake device that performs a braking action by bringing a lining member such as a brake shoe or a friction pad into sliding contact with a rotating body such as a drum or disc rotor that rotates integrally with a wheel, a recess is provided on the sliding surface of the rotating body. 1. A rotating body for a vehicle brake device, characterized in that a ceramic layer is provided on the edge of the concave portion.