Brake shoes, brakes and construction vehicles
A technology of brake shoes and brakes, applied in the field of vehicles, can solve the problems of uneven wear of friction plates and uneven braking force, and achieve the effect of prolonging service life
Active Publication Date: 2015-09-16
湖南中联重科车桥有限公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0004] The present invention aims to provide a brake shoe, a brake and an engineering vehicle to solve the problems in the prior art that the braking force provided by each point on the brake shoe is uneven and the wear of the friction plates is not synchronized
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[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0018] Please refer to figure 1 , the leading shoe 11 in the prior art has a self-energizing effect due to the same rotation direction as the brake drum, and the follower shoe 12 has a "negative" self-energizing effect because it is opposite to the brake drum direction, so the leading shoe 11 and The wear and tear of the friction lining on the shoe 12 is not the same. And as far as the leading shoe 11 is concerned, since the clearance between the friction plate and the brake drum in the circumferential direction is the same during design, when the brake shoe rotates around the shoe pin 20, the distances between the points on the friction plate and the shoe pin 20 are different. The resulting displacement is also different, which makes the radial pr...
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The invention provides a brake shoe, an arrester and an engineering vehicle. The brake shoe comprises a horseshoe and a plurality of friction discs, wherein the horseshoe comprises a plurality of friction disc installation regions, and the a plurality of friction disc installation regions are subjected to different pressures; a plurality of friction discs and a plurality of friction disc installation regions are arranged in a one-to-one correspondence manner, and along with the increase of the pressure to which the friction disc installation regions are subjected, the friction factors of the friction discs arranged in the friction disc installation regions are reduced, and / or the hardness is lowered, and / or the elastic modulus is increased. The brake shoe provided by the invention has the advantages that the friction discs with different properties are arranged on different regions with stress, each region can generate corresponding friction force, and the disadvantages that the greater friction force generated by a high pressure region in the prior art is overcome; and the auxiliary friction force generated by a low pressure region is overcome, the arrester can fully display the brake efficiency, and the service life of the friction discs is prolonged.
Description
technical field [0001] The invention relates to the field of vehicles, more specifically, to a brake shoe, a brake and an engineering vehicle. Background technique [0002] figure 1 A schematic structural diagram of a brake in the prior art is shown. Such as figure 1 As shown, most of the automotive air brakes in the prior art adopt the S-cam roller structure, and two brake shoes are arranged on one brake. 11 and 12 from the hooves. No matter be leading hoof 11 or from hoof 12, all are equipped with two friction plates on its hoof. The material formulation, coefficient of friction, hardness, modulus of elasticity, and thermal expansion rate of the two friction plates are exactly the same. The leading shoe 11 and the slave shoe 12 are pivotally connected to the base through shoe pins 20 . [0003] Such as figure 1 As shown, the leading shoe 11 is consistent with the rotation direction of the brake drum, and has the effect of increasing momentum, and the rotation direct...
Claims
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IPC IPC(8): F16D65/08F16D51/20
Inventor 谈智辉
Owner 湖南中联重科车桥有限公司