1, Zhan's coupler buffer device is a vehicle component used to connect vehicles with vehicles, locomotives or motor cars, transfer traction and braking force, and reduce longitudinal impact force. It consists of coupler, bumper, coupler tail frame, slave plate, etc., and is installed in the traction beam at the end of the underframe. In order to ensure the safety and reliability of vehicle couplers and the interchangeability of coupler buffer device installation.

2. At the same time, due to the mutual friction between the inclined surfaces of the inner and outer springs, part of the impact energy is converted into heat energy. When the external force is removed, the friction between the ring springs occurs again, and part of the stored energy is converted into friction heat energy and dissipated again, thus playing a role in buffering and vibration reduction.