An overload protection method for the load of the pivoting arm node and the pivoting arm node

Abstract

Disclosed are an overload protection method of a rotation arm section point and the rotation arm section point. According to the position of the rotation arm section point, the rotation arm section point is divided into a press fitting combined structure of two vulcanizing bodies and a core shaft, wherein the two vulcanizing bodies are mounted correspondingly on the core shafts mutually and connected end surfaces of two outer sleeves are in three-stage convex and concave muzzle matched step structures. Wherein, one of the vulcanizing body outer sleeve is of a concave structure and the other vulcanizing body outer sleeve is of a outer-convex structure and the two vulcanizing bodies are connected with each other through a three-stage convex and concave muzzle interference matched assembly. Through the corresponding positions of the outer sleeve and the inner sleeve, precompression of a rotation arm section point vulcanizing body rubber body is achieved. A radial limiting device is arranged in the rotation arm section point. Through the radial limiting device, overload in the rotation arm section point running process is prevented and the effect of overload protection is achieved. Theoverload protection device is arranged inside the rotation arm section point itself. Through contacting of the rotation arm section point outer sleeves and the core shafts, overload protection of thevulcanizing body rubber body is formed. When the rotation arm section point bears impacting or overload in the radial direction, variation in load is adapted to protect the rubber body from being damaged.

Description

technical field [0001] The invention relates to an overload protection method and device for system components of a vehicle, in particular to a method and device for overload protection of a pivoting arm node of a high-speed EMU, which is mainly used for the primary vibration reduction system of the bogie of a standard EMU in my country . The invention belongs to the technical field of manufacturing key components of rail transit vehicles. Background technique [0002] In order to truly form our country's own unified high-speed rail standard technology, our country has proposed to establish China's own standard EMU since 2012. The so-called Chinese standard EMUs: referred to as standard, refers to the EMUs dominated by the Chinese standard system (among the 254 important standards, various Chinese standards account for 84%), and its functional standards and construction standards for supporting tracks are higher than those in Europe Standards and Japanese standards have dis...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to solve the requirement that the existing pivoting arm nodes cannot be well adapted to the dynamic performance of high-speed EMU bogies. The product has too large longitudinal stiffness and deflection stiffness under normal working conditions, and the pivoting arm nodes are under normal working conditions. It is easy to be overloaded, resulting in damage to the joints of the rotating arm, which makes the wear of the vehicle wheelset, bearings and rails aggravated. A new method for overload protection of the joints of the rotating arm and the joint of the rotating arm is proposed. The new overload protection method for the joints of the rotating arm And the jib joint can improve the overload protection performance of the jib joint by changing the structure of the jib joint, and improve the overload protection status of the jib joint, so that the jib joint can meet the requirements of the vibration damping dynamic performance of the standard EMU bogie

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