Theory and application of gas springs

Gas spring is an accessory that can function as support, buffer, braking, height adjustment and angle adjustment. At present, the product has been widely used in medical equipment, automobiles, furniture, textile equipment, processing industries and other fields. According to different characteristics and application fields, gas springs are also called support rods, angle adjusters, gas pressure rods, dampers, etc. The basic principle of gas springs is to press inert gas and oil, or oil-air mixture into a closed cavity. According to the structure and function of the gas spring, there are mainly free gas springs, self-locking gas springs, random stop gas springs, traction gas springs and dampers.

1. Free-type gas spring (support rod) is the most widely used gas spring. It mainly plays a supporting role, with only the shortest and longest positions, and cannot stop by itself during the stroke. It is the most widely used in automobile, textile machinery, printing equipment, office equipment, construction machinery and other industries.

2. Self-locking gas springs (recliners, air pressure rods) are most widely used in medical equipment, seats and other products. This kind of gas spring can be stopped at any position in the stroke with the help of some release mechanisms, and has a large locking force (can reach more than 10000N) after stopping.

3. Free stop gas spring (friction gas spring) is mainly used in kitchen furniture, medical equipment and other fields. Its characteristics are intermediate between free-type gas springs and self-locking gas springs: it does not require any external structure and can be stopped at any position in the stroke, but there is no additional locking force.

4.The damper is used more in automobiles and medical equipment, and its characteristic is that the resistance changes with the speed of operation. It can significantly dampen the speed of the connected mechanism.

5. The traction gas spring is a special gas spring: other gas springs are in the longest position when they are in a free state, that is, they move from the longest position to the shortest position after being subjected to external force, while the traction gas spring is in the longest position. The free state of the type gas spring is at the shortest position, and it runs from the shortest position to the longest position when being pulled. There are also corresponding free type and self-locking type in the traction gas spring.