The air spring adds compressed air to the flexible airtight container and uses the compressibility of the air.
A kind of non-metallic spring with elasticity can be roughly divided into two types: bladder type and membrane type. The air spring has excellent elastic characteristics. It can greatly improve the smoothness of the vehicle in the suspension device of high-end vehicles, thus greatly improving The comfort of the vehicle running, so the air spring has been widely used in cars, railway locomotives. In addition, because air springs have many advantages over common steel springs, they are also used in some mechanical equipment and precision instruments.