Shock absorber product classification

- Oct 11, 2017 -

Material angle division

From the perspective of the generation of damping materials, shock absorbers are mainly hydraulic and inflatable two, there is a variable damping shock absorber.

Hydraulic type

Hydraulic shock absorbers are widely used in automotive suspension systems. The principle is that when the frame and the axle reciprocating relative movement and the piston in the shock absorber cylinder reciprocating movement, the shock absorber shell of the oil will repeatedly from the cavity through some narrow pores into another An inner cavity. At this point, the friction between the liquid and the inner wall and the internal friction of the liquid molecules form a damping force for vibration.


Inflatable shock absorber is a new type of shock absorber developed since the 1960s. Its structural feature is in the lower part of the cylinder with a floating piston, floating piston and cylinder at one end of the formation of a closed air chamber filled with high pressure nitrogen. An O-ring with a large cross-section on the floating piston, which separates the oil and gas completely. Working piston is equipped with its movement speed and change the size of the channel cross-sectional area of the compression valve and extension valve. When the wheel up and down beating, the shock absorber working piston in the oil reciprocating movement, so that the working piston between the upper chamber and the lower chamber pressure difference between the pressure oil will push the compression valve and extension valve and back and forth flow. As the valve on the pressure oil to produce a greater damping force, so that vibration attenuation.

Structural angle division

The structure of the shock absorber is a piston rod with a piston inserted into the barrel and filled with oil in the cartridge. The piston has an orifice so that the oil in the two-part space separated by the piston can complement each other. Damping is produced in the presence of viscous oil through the orifice, the smaller the orifice, the greater the damping force, the greater the viscosity of the oil, the greater the damping force. If the size of the orifice does not change, when the shock absorber is working fast, the damping will affect the absorption of the shock. Therefore, a disc-shaped leaf spring valve is provided at the outlet of the orifice, and when the pressure becomes large, the valve is opened and the orifice opening becomes large and the damping becomes small. As the piston is bi-directional movement, so both sides of the piston are equipped with leaf spring valve, respectively, called the compression valve and extension valve.

Air spring damping system

Air spring damping system

Shock absorber according to its structure, is divided into two kinds of single tube and binocular. Can be further divided into: 1. Monocular pressure shock absorber; 2. Double cylinder hydraulic shock absorber; 3. Binocular oil and gas shock absorber.

Double tube type

The shock absorber has two inner and outer barrels, the piston in the inner tube movement, due to the piston rod into and out, the volume of oil in the inner cylinder increases and shrinks, so by exchanging with the outer tube to maintain the inner cylinder of oil balance. So there are four valves in the double-barrel shock absorber, that is, in addition to the above mentioned piston on the two throttle, there are installed inside and outside the tube to complete the exchange between the role of the flow valve and compensation valve.

Single tube type

Compared with the double cylinder, single tube shock absorber simple structure, reducing a set of valve system. It is fitted with a floating piston in the lower part of the cylinder (the so-called floating means that there is no piston rod to control its movement), under the floating piston to form a closed air chamber, filled with high pressure nitrogen. Mentioned above due to the piston rod into and out of the liquid caused by changes in the level of the floating piston floating by the automatic adaptation. Except above

Tube shock absorber

Tube shock absorber

The two shock absorbers, there are adjustable resistance shock absorber. It can change the size of the orifice by external operation. The nearest car will be electronic control shock absorber as a standard equipment, through the sensor to detect driving state, calculated by the computer the best damping force, so that the damping force on the shock absorber to adjust the body to work automatically.

Detailed description of the drum shock absorber

The shock absorber is widely used in the car suspension system, and in the compression and stretching stroke can play a role in shock absorption, so it is called two-way action shock absorber.

The components include: 1. Piston rod; 2. Working cylinder; 3. Piston; 4. Tension valve; 5. Oil storage cylinder; 6. Compression valve; 7. Compensating valve; 8 flow valve; Dust cover;

Drum shock absorber work diagram

Drum shock absorber work diagram

When the car wheel is moved closer to the body and the shock absorber is compressed, the piston in the shock absorber moves downwards. The volume of the piston chamber is reduced, the oil pressure is increased, and the oil flows through the flow valve to the chamber (upper chamber) above the piston. The upper chamber is occupied by the piston rod part of the space, so the upper chamber to increase the volume is less than the lower chamber to reduce the volume, part of the oil then push the compression valve, flow back to the storage tank. These valves are economical to form a suspension by the damping force of the compression movement. The shock absorber is stretched away from the vehicle and the shock absorber is stretched, and the piston of the shock absorber moves upwards. Piston upper chamber oil pressure, the flow valve closed, the upper cavity of the oil pushed out of the extension valve into the lower chamber. Due to the existence of the piston rod, the oil flow from the upper chamber is not enough to fill the lower chamber to increase the volume, the main chamber to produce a vacuum, then the oil tank in the oil tank to push the valve into the lower chamber to supplement The Due to the throttling of these valves, the suspension acts as a damping effect in the actuation of the suspension.