Shock absorbers (Absorber) are used to suppress the shock and impact from the road surface when the spring rebounds after absorbing shock. It is widely used in automobiles to accelerate the attenuation of frame and body vibrations to improve the driving smoothness of the car. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jump.