Elastic daub buffer of subway vehicle

Abstract

The invention discloses an elastic daub buffer of a subway vehicle. The damper comprises an outer piston rod assembly, an inner piston rod assembly, a cylinder cover assembly, a cylinder body and elastic cement gum, the outer piston rod assembly comprises an outer piston rod, an outer guide belt, a one-way valve steel ball, a positioning flat plug in threaded connection, an inner guide belt, a sealing piece, a positioning ring and an elastic check ring, the inner piston rod assembly comprises an inner piston rod, a guide belt, a one-way valve steel ball and a positioning flat plug in threadedconnection. The cylinder cover assembly comprises a cylinder cover, a static sealing piece, a dustproof ring, a sealing piece, a guide belt, a guide ring, an elastic check ring, a one-way valve steelball, a positioning flat plug in threaded connection, a reverse one-way valve steel ball and a set screw. By adopting an inner and outer double-piston-rod structure, a two-stage damping system, a double-sealing structure, a built-in sealing structure and the like which are alternately used under different impact speed working conditions, the shock absorber has the advantages of being stable in performance, good in sealing performance, low in initial impedance, good in restorability, long in service life and the like.

Description

technical field [0001] The invention relates to a buffer for rail transit equipment couplers, in particular to an elastic cement buffer for subway vehicles, and belongs to the technical field of rail transit equipment. Background technique [0002] The buffer is one of the important parts of the rail vehicle. It mainly plays the role of transmitting the longitudinal traction force when the train is pulling, and mainly plays the role of easing the longitudinal impulse of the train when braking. The comprehensive performance of the buffer directly affects the running quality of the train and the reliability of the car body structure. A good buffer can effectively reduce the coupler force, reduce knuckle wear, reduce longitudinal impulse, and improve the service life of the coupler and the vehicle. [0003] In recent years, with the acceleration of China's urbanization process, the urban population density has gradually increased. In order to alleviate urban traffic pressure a...

AI Technical Summary

Problems solved by technology

[0004] At present, subway buffers are mainly equipped with elastic cement buffers and elastomer buffers. In order to maintain good low-temperature resilience, the existing elastic cement buffers require a high initial filling pressure, which will lead to High initial resistance, in order to reduce the initial resistance, the existing elastic cement buffer has multiple sets of disc springs connected in series, and after the disc springs are connected in series, the characteristic curve rises sharply at the critical point of displacement

The existing elastomer buffer has the advantages of free maintenance, light weight, and relatively high reliability, but it also has disadvantages such as aging creep, relatively low absorption rate, high static impedance, and short life.

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