Intermediate shaft brake

Abstract

The invention relates to the technical field of vehicles, in particular to an intermediate shaft brake which comprises an intermediate shaft and two dual friction assemblies, and the two dual friction assemblies are oppositely arranged on the two sides of the radial direction of the intermediate shaft in a spaced mode. The dual friction assembly comprises an air cylinder shell, a piston, a dual friction block and a return spring. The dual friction block is connected to the piston, the piston can slide relative to the air cylinder shell and is provided with a braking position and a non-braking position, when the piston is located at the braking position, the dual friction block is attached to the intermediate shaft, and when the piston is located at the non-braking position, the dual friction block is separated from the intermediate shaft and cannot be affected by an oil film, residual braking is avoided, and the service life of the piston is prolonged. And high-pressure gas input into the piston cavity from the high-pressure gas source can drive the piston to move to the braking position from the non-braking position, and the return spring can drive the piston to move to the non-braking position from the braking position.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an intermediate shaft brake. Background technique [0002] In the AMT market of heavy-duty commercial vehicles at home and abroad, the intermediate shaft brakes are in the form of multi-piece wet brake pads, and the cylinder pistons are arranged axially, and the pistons are in direct contact with the gear oil. In terms of reliability, this traditional multi-piece wet brake pad set structure has very high requirements for heat dissipation. [0003] For example, the previous patent with the application number CN201921107831.3 provides an intermediate shaft brake, which includes a brake housing, a piston, a friction plate and a steel plate. There is a brake groove matching with the steel claw in the direction, and a positioning steel plate is installed on the installation end surface of the brake housing. The positioning steel plate includes the positioning steel plate body, and t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an intermediate shaft brake to solve the problem that the intermediate shaft brake in the related art adopts a multi-piece wet brake plate group structure, and the friction plates keep relative movement with respect to the steel plate at all times when the brake is not working, causing Unnecessary drag loss, at the same time, during the brake release process, the steel plate and the friction plate cannot be separated quickly due to the oil film effect, causing unnecessary residual braking problems

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