The semi-trailer suspension system consists of elastic components, guiding devices, shock absorbers, buffer blocks, and lateral stabilizers. Generally speaking, the suspension system of trailers is divided into two types: non independent suspension and independent suspension. At present, the suspension of heavy-duty trailers in China is mainly non independent suspension, and the elastic components of the suspension are generally steel plate springs.

Types of suspension for domestic heavy-duty trailers

Leaf spring suspension

Steel plate spring suspension (referred to as leaf spring suspension) is further divided into small section variable section steel plate suspension and equal section multi plate spring suspension. Currently, over 95% of heavy-duty truck suspension systems in China are non independent suspensions that use steel plate springs as elastic components and guide devices. Their main advantages are simple structure, easy manufacturing, convenient maintenance, mature technology, and reliable operation.