3 Types Suspensions For Semi Trailers
March 11, 2021
Suspension is an important component connecting the chassis and the frame. The supporting force, braking force, driving force, etc. of the semi trailer are transmitted through the suspension system, and it can also reduce the impact of harsh roads on the semi trailer and ensure the stability of the semi trailer , Its importance is self-evident. There are 3 types of suspensions for common semi trailers.
Leaf Spring Suspension.
Leaf spring suspension full name is series-connected leaf spring balance suspension. It is mainly composed of leaf springs, suspension support, connecting rods, U bolts and other parts. The longitudinal force of the semi trailer falls directly on an axle. The biggest advantage of this suspension is that it is cheap, reliable and easy to maintain.
The most obvious feature of the air suspension is its airbag type air spring. The air spring itself is relatively light in weight, the friction of the air medium in the airbag is small, there is almost no noise when working, and its life is 2-3 times that of a leaf spring. However, when an air spring is used, a rod system that can transmit various forces and moments other than the vertical force must be provided, so the suspension structure is complicated; in addition, the air spring has strict requirements for sealing, and its cost is also high.
Single Point Suspension.
Single-point suspension is to reduce the common leaf spring front and rear brackets into a single bracket connected to the semi trailer. Its stress points are shared on the front and rear axles. Compared with ordinary leaf spring suspensions, single-point suspension has a higher loading capacity.