Energy feedback shock absorber with damping stiffness changing along with road condition

Abstract

The invention discloses an energy feedback shock absorber with damping stiffness changing along with a road condition. The energy feedback shock absorber adopts a combined piston structure, through the combination of a first bent circuit throttle oil way and a second bent circuit throttle oil way, oil liquid in the upper cavity of a cylinder barrel is connected with a hydraulic system through the first bent circuit throttle oil way and the first oil way of a piston rod, oil liquid in the lower cavity of the cylinder barrel is connected with the hydraulic system through the second bent circuit throttle oil way and the second oil way of the piston rod, pressure oil flow circulation generation is realized, and the vibration energy of the shock absorber is converted into storable electric energy; a gas bag arranged at the bottom of the cylinder barrel is communicated with an oil-gas separation pressure balance type energy accumulator gas cavity, the volume of the gas bag is increased or decreased through the elastic deformation of the gas bag, and the problem that the changes for the volumes of the upper cavity and the lower cavity of the cylinder barrel are unequal when the piston slides is effectively solved; a control device appropriately delays the opening time of a related electromagnetic check valve according to pressure jump feedback obtained by a first pressure sensor and a second pressure sensor, and the adaptive control that the damping stiffness of the shock absorber changes along with the road condition is realized, so that the frequency and amplitude of vibration between a frame and an axle is reduced, and the frame can be effectively protected from being damaged.

Description

technical field [0001] The invention relates to the field of shock absorbers, in particular to an energy-feeding shock absorber whose damping stiffness changes with road conditions. Background technique [0002] Existing shock absorbers used on heavy engineering vehicles have the problem that the damping stiffness of the shock absorber cannot be adjusted with the road conditions in terms of shock absorption performance, which causes frequent and severe relative movements between the frame and the axle, which not only reduces the suspension The service life of the frame, and the energy generated by the vibration is dissipated as waste heat, which causes unnecessary energy loss while causing damage to the suspension. Contents of the invention [0003] The object of the present invention is to provide an energy-feeding shock absorber whose damping stiffness changes with road conditions. [0004] The invention is composed of an energy-feeding shock absorber, a hydraulic devic...

AI Technical Summary

Problems solved by technology

[0002] Existing shock absorbers used on heavy engineering vehicles have the problem that the damping stiffness of the shock absorber cannot be adjusted with the road conditions in terms of shock absorption performance, which causes frequent and severe relative movements between the frame and the axle, which not only reduces the suspension The service life of the frame, and the energy generated by the vibration is dissipated as waste heat, causing damage to the suspension and causing unnecessary energy loss

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