Floating type double-layer back plate brake pad

Abstract

The invention relates to a floating type double-layer back plate brake pad which is characterized by comprising a pad thick back plate, a pad thin back plate, a dovetail element, a plurality of pad friction blocks and a plurality of elastic pads. The pad thick back plate is of an arc-shaped semi-sole structure; the elastic pads are provided with spherical supporting faces; the pad friction blocks are provided with spherical supporting faces and fastening connecting elements; the elastic pads enable the friction blocks to be adjusted in an elastic mode in the vertical direction relative to the pad thick back plate and the pad thin back plate; the spherical supporting faces of the elastic pads and the spherical supporting faces of the friction blocks can rotate; the friction blocks are cylindrical, and mutual positioning of the friction blocks in an installation plane is achieved in the circumference direction by means of three evenly distributed convex keys on a round back plate and three evenly distributed key grooves in the pad thin back plate. Compared with an existing structure, in braking of a train, the maximum contact friction area can be obtained due to pads and a brake disc, braking is stable, the functions of damping, shock absorbing, denoising, heat dissipation and the like are achieved, the friction blocks and the elastic pads can be replaced, train operation cost is reduced, and the floating type double-layer back plate brake pad can be widely applied to braking systems of high-speed trains.

Description

technical field [0001] The invention relates to a disc brake device, in particular to a double-layer back plate brake pad. Background technique [0002] Due to the high speed level of high-speed trains, the braking energy is relatively large. When braking, the heat load between the brake pad and the brake disc is relatively large: not only the friction block of the brake pad is required to be wear-resistant, high temperature resistant, and low-noise, but also a good contact between the friction block and its installed parts is required. Thermal conductivity and load balancing performance, etc. [0003] At present, in the braking system of the high-speed train disc brake device, the existing brake pad structure is as attached figure 1 , figure 2 As shown, since the friction block of the brake pad is welded or riveted to the steel back and the dovetail, there is neither relative rotation nor floating between the friction block and the steel back, so that the braking pressu...

AI Technical Summary

Problems solved by technology

[0003] At present, in the braking system of the high-speed train disc brake device, the existing brake pad structure is as attached figure 1 , figure 2 As shown, since the friction block of the brake pad is welded or riveted to the steel back and the dovetail, there is neither relative rotation nor floating between the friction block and the steel back, so that the braking pressure of each friction block on the brake disc Unbalanced, the maximum effective friction area cannot be obtained, the thermal load is too large during braking, and the service life of the brake pads is reduced

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