Hydraulic shock absorber

Abstract

The invention discloses a hydraulic shock absorber. The hydraulic shock absorber comprises a lower connecting assembly, a bottom valve assembly, an inner oil cylinder assembly and an upper connectingassembly; the lower connecting assembly is formed by welding a ball corner connecting shaft assembly and an outer oil cylinder; the bottom valve assembly is arranged on the inner side of the bottom ofthe outer oil cylinder, and an inner oil cylinder is arranged on the bottom valve; the upper connecting assembly comprises a guide sleeve assembly and an upper connecting assembly, the guide sleeve assembly comprises a guide sleeve and a gland, and the guide sleeve and the gland are screwed into the upper inner wall of the outer oil cylinder through threads and are in contact with the top surfaceof the inner oil cylinder; the upper connecting assembly comprises a piston, a piston rod and the ball corner connecting shaft assembly, the piston is arranged in the inner oil cylinder, the piston rod penetrates through the guide sleeve, one end of the piston rod is connected with the piston, the other end of the piston rod is welded to the ball corner connecting shaft assembly, and a sealing structure is arranged between the piston rod and the guide sleeve; and the bottom valve comprises a bottom valve, a first fixed throttling hole and a first one-way valve on the bottom valve; and a second fixed throttling hole and a second one-way valve are arranged on the piston. The device is simple in structure, stable in vibration reduction performance, good in sealing performance, easy to process a workpiece, free of cavitation and long in service life.

Description

technical field

[0001] The invention specifically relates to a hydraulic shock absorber, which belongs to the technical field of hydraulic shock absorption. Background technique

[0002] With the rapid development of my country's railways, more and more locomotives have reached a speed of more than 200km / h. At this time, the safety and stability of rolling stock operation will become the biggest problem faced by passenger cars. This puts forward higher requirements for the running gear of the rolling stock. The hydraulic shock absorber is one of the important parts of the car body bogie. Its main function is to convert the absorbed vibration energy into heat energy and release it in the atmosphere to attenuate the vibration energy. It is manifested as attenuating the amplitude of the vibration system and suppressing the vibration of the system. , Improve the dynamic performance of the vibration system, thereby improving the safety, reliability, stability and comfort of the ...

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