Springs can be divided into the following 6 categories:
1. Torsion springs are springs that withstand torsional deformation, and their working parts are also tightly wound into a spiral shape. The end structure of the torsion spring is a torsion arm processed into various shapes, rather than a hook. The torsion spring uses the principle of leverage to twist or rotate the elastic material with soft material and high toughness, so that it has great mechanical energy. 2. Extension springs are spiral springs that withstand axial tension. When not under load, the coils of the extension spring are generally tight and there is no gap between them. 3. Compression springs are spiral springs that withstand axial pressure. The cross-section of the material used is mostly circular, and there are also rectangular and multi-strand steel windings. The springs are generally of equal pitch. The shapes of compression springs include: cylindrical, conical, convex and concave, and a small number of non-circular shapes. There will be a certain gap between the coils of the compression spring. When subjected to external loads, the spring contracts and deforms to store deformation energy. 4. Progressive springs. This type of spring adopts a design with inconsistent thickness and density. The advantage is that when the pressure is not large, the part with lower elastic coefficient can absorb the ups and downs of the road to ensure riding comfort. When the pressure increases to a certain extent, the thicker part of the spring plays a role in supporting the vehicle body. The disadvantage of this type of spring is that the control feeling is not direct and the accuracy is poor. 5. Linear springs. The thickness and density of linear springs from top to bottom remain unchanged, and the elastic coefficient is a fixed value. This design of spring can make the vehicle obtain a more stable and linear dynamic response, which is conducive to the driver to better control the vehicle. It is mostly used for performance-oriented modified vehicles and competitive vehicles. The disadvantage is of course that comfort is affected. 6. Short springs. Short springs are shorter than original springs and are more sturdy. Installing short springs can effectively lower the center of gravity of the vehicle body, reduce the roll caused by cornering, make cornering more stable and smooth, and improve the vehicle's cornering controllability. The damping setting of the original shock absorber is more comfortable, so the short spring and the original shock absorber are not very stable in cooperation. It cannot effectively suppress the rebound and compression of the short spring. When driving on bumpy roads, there will be an uncomfortable jumping feeling. In the long run, the life of the shock absorber will be greatly shortened, and oil leakage may occur. Of course, the above conditions are relative. There will not be such serious damage in daily driving, and try not to drive vigorously. After all, the original shock absorber cannot withstand high load pressure.