Atomotive springs are generally composed of multiple steel plates of unequal length and unequal curvature. Generally, both ends will naturally bend upwards after installation. When the impact force on the wheel is transmitted, the steel plate will be deformed, which can play the role of buffering and damping. It also has the role of guiding force in the longitudinal arrangement. Most of the non-independent suspensions use leaf springs as elastic elements. This kind of spring can omit the guiding device and the shock absorber, and the structure is very simple.