The shock absorber (Absorber), the shock absorber is mainly used to suppress the shock of the rebound after the spring suction and the impact from the pavement. When passing the rough road, although the shock absorber spring can filter the vibration of the road surface, the spring itself will have reciprocating motion, and the shock absorber is used to suppress this spring jump. The shock absorber is too soft, the body will jump up and down, the shock absorber too hard will bring too much resistance, impeding the normal work of the spring. In the modified process on the suspension system, shock absorber hard to collocation with hard spring, and the spring stiffness and weight are closely related, so the heavier vehicles generally use hard shock absorber. A device that is connected to an earthquake induced crankshaft is used to counteract the torsional vibration of the crankshaft (the phenomenon of the crankshaft twisting by the impact of the ignition of the cylinder).
Hydraulic shock absorber:
The hydraulic shock absorber is widely used in the vehicle suspension system. The principle is that when the frame and vehicle bridge are moving relative to each other and the piston moves back and forth in the cylinder of the shock absorber, the oil in the absorber shell will flow again from the inner cavity through some narrow pores into the other inner cavity. At this point, the friction between the liquid and the inner wall and the internal friction of the liquid molecules form the damping force of the vibration.
Inflatable shock absorber:
The inflatable shock absorber is a new type of shock absorber developed since 60s. The structure is characterized by a floating piston in the lower part of the cylinder, which is filled with high pressure nitrogen in a closed air chamber formed by a floating piston and one end of the cylinder. The floating piston is equipped with a large section O sealing ring, which separates the oil and gas completely. The working piston is equipped with a compression valve and an extension valve that changes the section area of the channel with its speed of motion. When the wheels are beating up and down, the working piston of the shock absorber moves reciprocally in the oil, resulting in an oil pressure difference between the upper and lower chambers of the working piston, and the pressure oil pushes the compression valve and the extension valve back and forth. The vibration attenuation is caused by the larger damping force of the valve on the pressure oil.