The suspension usually includes a body connecting frame and a rubber assembly, and the rubber assembly acts as shock absorber. The rubber assembly consists of shell, core, rubber damping block, and a stud bolt with nuts. The rubber damping block is wrapped in the lower part of the core by vulcanization. The rubber damping block is fixed and installed in the shell. The upper part of the core extends out of the shell, and the lower end of the stud bolt extends into the core and is locked together.

Metal hardness, rubber hardness, etc, are adapt to the performance requirements.