Connecting rod type pneumatic car arrester

The utility model relates to a connecting rod type pneumatic car arrester. The connecting rod type pneumatic car arrester comprises two car arrester assemblies installed on rails on the two sides respectively. A bottom plate is arranged between the two rails. The two car arrester assemblies are jointly connected with a five-connecting-rod mechanism. A cylinder pushes and pulls a middle connecting rod I to drive connecting rods connected with the middle connecting rod I, the hinge position of the connecting rod II and the connecting rod III and the hinge position of the connecting rod IV and the connecting rod V are limited so as to move in the rail direction through baffles so that the connecting rod III and the connecting rod V can be driven to move in the direction perpendicular to the rail direction, executing assemblies of the car arrester assembly perpendicular to the horizontal plane are driven to rotate on the vertical plane, and then the car arrester makes contact with or is separated from the rails. By the adoption of the connecting rod type pneumatic car arrester, through the design of the five-connecting-rod mechanism, the two car arrester assemblies can be opened and closed only through one cylinder, manual operation is changed into pneumatic operation, operating processes are reduced in the using process, work efficiency is improved, and transportation accidents caused by various unsafe factors are avoided.