Crank pin type brake shoe opening device

Abstract

The invention relates to the technical field of brake shoes, and discloses a crank pin type brake shoe opening device which comprises a brake drum and a using device, and the using device comprises a brake chassis, a friction plate, brake shoes, a first return spring, a second return spring, a shoe pin block, a shoe pin shaft, a driving device, a driving shaft, a linkage rod, an ejector rod and a sliding wheel. The bottom of the brake drum and the top of the brake chassis are fixedly installed, the outer wall of the friction plate and the inner wall of the brake drum are fixedly installed, and the brake shoes are fixedly installed on the inner wall of the brake drum. Through the arrangement of the driving device, the driving shaft, the linkage rod, the ejector rod and the sliding wheel, when the brake is treaded down, the driving device is driven by the power of the brake cylinder to push the driving shaft to rotate, and then the ejector rod is driven by the linkage rod to move axially, so that the two brake shoes are opened, the friction plates on the brake shoes are tightly pressed on the inner circular surface of the rotating brake drum, a running vehicle is decelerated or stopped by virtue of friction force, and the effect of conveniently using the device is achieved.

Description

technical field [0001] The invention relates to the technical field of brake shoes, in particular to a bellcrank pin type brake shoe spreading device. Background technique [0002] The brake shoe is the friction couple of the drum brake. In addition to the strength and rigidity required as a component, it should also have as high and stable a friction coefficient as possible, as well as appropriate wear resistance, heat resistance, and heat dissipation. and heat capacity etc. According to whether the rotation direction of the brake shoe is consistent with the rotation direction of the brake drum when it is opened, there are leading shoes and trailing shoes. When the rotation direction of the brake shoe is consistent with the rotation direction of the brake drum, it is called the leading shoe, which has the function of braking "increasing momentum", and is also called "boosting shoe"; otherwise, it is called the following shoe, or "Reducing hoof". [0003] However, the exi...

AI Technical Summary

Problems solved by technology

[0003] However, the existing automobile brake shoes have poor support when they are opened, and it is not convenient to reinforce the brake shoes. During long-term use, problems such as wear and deformation are prone to occur, which is not conducive to prolonging the service life of the device and reducing the It affects the support and stability of the device, and it is not convenient for users to use

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