The role of suspension

The suspension is an important part connecting the chassis and the frame. The supporting force, braking force, and driving force of the vehicle are all transmitted through the suspension system, and it can also reduce the impact of bad roads on the vehicle and ensure the stability of the vehicle. , its importance is self-evident. 

Suspensions are generally divided into independent and non-independent suspensions. For semi-trailers, due to the need for strong carrying capacity, non-independent suspensions are used.