Brake block for bus and preparation method thereof

Abstract

The invention relates to a brake block for a bus. The brake block is characterized by comprising a friction layer (i) and a base layer (ii), wherein the friction layer is abraded with a brake drum and is used for slowing down the vehicle; the base layer is mechanically connected with a brake shoe and is used for supporting the friction layer; the thickness of the friction layer is 1-1.4 times the thickness of the base layer. According to the invention, the structure of the brake block is designed as a double-layer structure, so that the material cost is lowered while the property of the brake is ensured. Through the mutual matching of all materials and components of the brake block, the service life of the vehicle brake is prolonged and the brake noise of the vehicle is reduced.

Description

technical field [0001] The invention relates to a brake pad and a preparation method thereof, in particular to a bus brake pad and a preparation method thereof, and belongs to the technical field of friction materials for automobiles. Background technique [0002] Buses mainly operate in urban areas, with dense crowds, many stops, and frequent braking. Therefore, compared with cars and trucks, their brake pads have special requirements: (1) High and stable friction coefficient, sensitive braking; (2) Good wear resistance; (3) Environmental protection, low braking noise and low dust. [0003] In the prior art, the brake pads for buses mainly have the following problems: (1) high temperature heat decay, although the average running speed of the bus is not high, but the load is heavy, the brakes are frequent, and the brake pads are often at 200-300 ° C or even higher. Working at high temperature, the friction factor decreases, resulting in a decrease in braking force; (2) the ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the brake pads for buses mainly have the following problems: (1) high temperature heat decay, although the average running speed of the bus is not high, but the load is heavy, the brakes are frequent, and the brake pads are often at 200-300 ° C or even higher. Working at high temperature, the friction factor decreases, resulting in a decrease in braking force; (2) the service life is short, the service life of bus brake pads is generally less than 20,000 kilometers, and the replacement and maintenance costs are high; (3) Brake noise, bus When braking, there is often harsh braking noise, which has become one of the main pollution sources of urban noise; (4) choking cloth, when the bus enters the station, when the driver lightly steps on the brake pedal, the vehicle often appears abnormal "chattering" phenomenon, the occupants feel very uncomfortable