Semi-active vibration absorber

Abstract

The invention relates to a technology of a novel structure of a semi-active damping-adjustable vibration absorber for suspension of automobiles, locomotives and rolling stocks. The vibration absorber comprises two end part connecting rings, a piston rod, a sealing and guiding device, a cylinder body, a vibration absorber cover in threaded connection with the cylinder body, a piston valve assembly and a bottom valve assembly, and also comprises a tensile unloading electromagnetic valve assembly embedded in the piston valve assembly and the piston rod, a compression unloading electromagnetic valve assembly embedded in the bottom of the bottom valve assembly, and an external high-pressure small oil chamber arranged in a lug boss and provided with a master control valve assembly and a safety valve assembly; and the tensile unloading electromagnetic valve assembly, the compression unloading electromagnetic valve assembly and the master control valve assembly are controlled by a controller. By the vibration absorber, the magnitude and the direction of a damping force can be controlled without the relative speed for auxiliary judgment, and both the unloading control related to movement and the control of the magnitude of the damping force are provided.

Description

technical field [0001] The invention relates to a new structure technology of an adjustable damping shock absorber used for the semi-active suspension of automobiles and locomotives. Background technique [0002] In 1983, Japan's Toyota Motor Corporation developed a "switch" semi-active suspension with three damping conditions and applied it to the Toyota Soarer 280GT sedan. [0003] This kind of semi-active suspension that can achieve "Skyhook damping" control can significantly improve the ride comfort of the vehicle, but it often requires proportional valves, high-speed switching valves and special oil circuits to realize oil flow in different chambers. The structure of inter-chamber flow is quite different from that of ordinary shock absorbers. For example, the cylinder body is designed as a three-stage structure. The processing costs of these design schemes are relatively high, and they also have high requirements for assembly accuracy; although the oil flow between dif...

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Problems solved by technology

The processing costs of these design schemes are relatively high, and they also have high requirements for assembly accuracy; although the oil flow between different chambers can be realized by arranging oil pipes, the increase in the length of the oil passage will bring a negative impact on the dynamic response of the damping force. influences

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