Pneumatic rotating locking device for wrecker

The utility model provides a pneumatic rotating locking device for a wrecker. The pneumatic rotating locking device is mainly characterized in that a support is fixed on the lower portion of a rotating supporting seat plate, an air source is from an original air storage barrel of the wrecker and is connected with a cylinder via an air pipe, when the cylinder works, a cylinder drawing bar drives a swinging connecting rod, a rotating connecting rod moves and contracts so as to drive the swinging connecting rod to move downwards, and accordingly a moving connecting rod is downwards pulled so as to drive a lock shaft to move up and down in a slide way in a reciprocating manner. Locking and unlocking of a rotating mechanism are realized. The pneumatic rotating locking device has the advantages that the pneumatic rotating locking device resolves the problem that the rotating mechanism cannot be locked when a hydraulic system is in an abnormal working state. A pneumatic rotating locking pin device is added onto the