Powder metallurgy brake pad for D-series high-speed train set

Abstract

The invention discloses a powder metallurgy brake pad for a D-series high-speed train set. The powder metallurgy brake pad comprises a steel backboard, a dovetail block and a plurality of brake pad friction bodies. The steel backboard and the dovetail block are of an integrated forming structure, any brake pad friction body is fixed to the steel backboard through a big gasket and a rivet, each big gasket is located between the corresponding brake pad friction body and the steel backboard, and the positions, located on the edges of the brake pad friction bodies, of the steel backboard are provided with flanges matched with the brake pad friction bodies in shape. According to the brake pad, due to adoption of the structure of particular design, rigidity and reliability of the steel backboard are increased, the machining process and riveting process are simplified, the production cost of the brake pad is lowered, reliability of the brake pad is improved, the service life of the brake pad is prolonged, and the powder metallurgy brake pad can be widely applied to brake systems of various railway vehicles and high-speed D-series train sets.

Description

technical field [0001] The invention relates to the field of motor vehicle braking, in particular to a powder metallurgy friction brake pad with high structural strength and convenient assembly. Background technique [0002] At present, the existing EMU vehicles are used for powder metallurgy brake pad friction bodies with a speed of 200-250km / h, and most of them adopt the process of integrally sintering on the steel back plate or riveting the friction body on the steel back plate; in addition , The steel back plate and the dovetail block are respectively processed by steel plates, and the steel back plate and the dovetail block are connected by welding or riveting. [0003] Chinese patent CN103470665A discloses a powder metallurgy brake pad for CRH5 type EMU. The steel back plate and the dovetail block are connected by riveting process, and the rotation is stopped by 15 cotter pins at the same time. There are the following problems: [0004] 1. Since the steel back plate ...

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Problems solved by technology

[0004] 1. Since the steel back plate is only 3-4mm thick, it is very easy to deform during processing, heat treatment and subsequent use, so the yield is low, the processing cost is high, and the braking performance of the brake pad is affected by the deformation of the steel back plate;

[0005] 2. Since the dovetail block is thin (about 3mm thick) and has no reinforcing ribs, the dovetail block is easily deformed during use, and the brake pads are easy to fall off from the brake caliper, which poses a safety hazard. In addition, the stamping processing size is not easy to guarantee;

[0006] 3. The steel back plate and the dovetail block, the steel back plate and the friction body of the brake pad are all riveted, the riveting times are many, the process is complicated, and the efficiency is low;

[0007] 4. Cotter pin stop rotation is easy to fail

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