Reinforced precision cast brake shoe assembly

Abstract

A reinforced precision cast brake shoe assembly is formed by connection of an arc shoe panel and two shoe rib plates in parallel arrangement on the inner arc surface of the shoe panel. The inner surface of the shoe panel is peripherally provided with a first reinforcement rib in a full-surrounded structure, and a plurality of groups of second reinforcement ribs perpendicular to the shoe rib plates are arranged on the inner side of the first reinforcement rib and positioned on the inner surfaces of the shoe rib plates. The inner surface of each shoe rib plate is provided with a plurality of rivet holes parallel to the center line of the corresponding shoe rib plate, and the inner surface of each shoe rib plate is provided with two rows of rivet holes in staggered distribution on two sides of the corresponding shoe rib plate. Due to addition of a row of the rivet holes in the middle of a shoe, integral riveting strength of a friction plate and a brake shoe is improved, a riveting gap is reduced, and the service life of the friction plate on the brake shoe is prolonged while braking effects are improved. By appropriate reduction of wall thickness at the riveting joint of the brake shoe and the friction plate, the integral weight of the brake shoe is reduced, and heat radiation effects of a whole product are improved.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a FS155 reinforced precision casting brake shoe assembly. Background technique [0002] The brake shoe is pushed outward by the action of the brake camshaft, and pressed against the inner surface of the brake drum with its friction plate. The non-rotating brake shoes generate frictional torque on the rotating brake drum, thereby generating braking force to suppress the brake drum to act as a brake accessory. It is installed on the front steering knuckle and is the key safety factor in the car braking system. One of the parts. [0003] In my country, it will be mandatory to use automatic adjustment arms for trucks and buses starting in January 2018. At present, the cast hoofs with old structures on the market are overweight and poor in heat dissipation, which do not meet the current needs of lightweight vehicles. However, welding brake shoes have poor rigidity, low he...

AI Technical Summary

Problems solved by technology

[0006] 1. The rivet holes of the shoe plate are set on both sides of the tendon plate, and the outer surface of the shoe plate and the friction plate are riveted by countersunk semi-hollow rivets. The riveting strength is poor, which reduces the braking effect of the brake shoe

[0007] 2. The overall rigidity of the brake shoe is poor, and long-term braking will cause damage to the rib plate and shoe panel, resulting in structural deformation and affecting the braking effect

[0008] 3. The brake shoe is heavy and has poor aesthetics. It is prone to overadjustment during use, which will cause the brake shoe to lock up, cause the friction plate to overheat, and finally cause safety accidents such as fire.

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