Buffering device for towing trolleys and towing trolley set comprising same

The invention discloses a buffering device for towing trolleys. The buffering device comprises a connecting sleeve and a buffer, and the buffering device can deform under the action of external force, so that kinetic energy generated at the moment when the towing trolleys walk and start is converted into elastic potential energy, impact force borne by a chain ring at the connecting position of the towing trolleys is reduced, and therefore the impact resistance of a towing unit is improved and the service life of the towing unit is prolonged. The invention further provides a towing trolley set. The towing trolley set comprises at least two towing trolleys, at least two buffering devices, a connector and a steel wire rope, wherein the two ends of the connectors are each connected with one buffer, the other end of each buffer is connected with one towing trolley, and the steel wire rope penetrates through the whole towing trolley set and is fixed to the two ends of a belt storage bin frame. The connector is thre