The gas spring is filled with inert gas or oil-air mixture in a closed pressure cylinder, so that the pressure in the cavity is several times or tens of times higher than the atmospheric pressure, and the pressure difference generated by the use of the cross-sectional area of the piston rod is smaller than that of the piston to achieve the movement of the piston rod. Due to the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow speed, little change in dynamic force (usually within 1:1.2), and easy control; the disadvantage is that the relative volume is not as small as the coil spring, and the cost is high , The lifespan is relatively short.
According to its characteristics and application fields, gas springs are also called support rods, angle adjusters, gas pressure rods, dampers, etc. According to the structure and function of the gas spring, there are several types of gas springs, such as free-type gas springs, self-locking gas springs, traction gas springs, random stop gas springs, swivel chair gas springs, gas pressure rods, and dampers. At present, the product is widely used in automobile, aviation, medical equipment, furniture, machinery manufacturing and other fields.
