Damping regulating mechanism of shock absorber

Abstract

The invention relates to a damping regulating mechanism without delay on damping regulation and with excellent reliability. The damping regulating mechanism comprises an inner shaft, the inner shaft is arranged in an axial through hole in a piston rod of a shock absorber, and the bottom of the inner shaft is provided with a sliding ejector pin integrated with the inner shaft; the sliding ejector pin is matched with the axial through hole at the bottom of the piston in a thread manner; the inner shaft is connected with an electric regulating system in a transmission manner; a piston is arranged at the bottom of the piston rod and is provided with a first flowing hole; a second flowing hole is arranged on a thread matching section of the bottom of the piston rod and the sliding ejector pin;and the electric regulating system drives the inner shaft to rotate so as to regulate the position of the sliding ejector pin and regulating the opening degree of the second flowing hole, that is to say, the damping regulation is realized. When working, the shock absorber is closed or opened by the electric regulating system, the damping size of the shock absorber is regulated, and the second flowing hole is closed when the electric regulating system controls the sliding ejector pin moves downwards to a limit position, thus the damping is increased; otherwise, the damping is reduced.

Description

technical field [0001] The invention relates to a damping adjustment mechanism of a shock absorber. Background technique [0002] In the suspension system of a car, the elastic element vibrates due to the impact. In order to improve the ride comfort of the car, a shock absorber is installed in parallel with the elastic element in the suspension. Force shock absorber, its working principle is that when there is relative movement between the frame (or body) and the axle due to vibration, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to the other. Flow into another cavity through different pores. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vehicle vibration energy is converted into oil heat energy, which is then absorbed by the shock absorber and released into the atmosphere. [...

AI Technical Summary

Problems solved by technology

[0004] This prior art has the following deficiencies: the inner shaft 4 and the sliding thimble 17 are split structures, and at the moment when the inner shaft 4 is quickly adjusted to move upward, there is often a gap between the inner shaft 4 and the sliding thimble 17, resulting in the existence of a damping adjustment. The large delay affects the use effect of the shock absorber; in addition, once the sliding thimble 17 is "stuck" by impurities, the shock absorber loses its damping adjustment function, that is, its reliability is low

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