Take self -locking function's arresting gear

The utility model provides a take self -locking function's arresting gear, including the cylinder body, remove along settlement axis direction in the cylinder body and be equipped with the piston, threaded connection has the edge on the piston axis extend's adjusting screw, adjusting screw's front end be through first screw thread section and piston threaded connection, has a retainer through fastener releasable connection on the cylinder body, and the retainer can wind along with the tearing open of fastener, dress state axis free rotation or through the cooperation of splining of spline structure and cylinder body, adjusting screw through its go up set up with first screw thread section screw thread soon to opposite second screw thread section and retainer threaded connection. The utility model has the advantages of because the existence of reverse screw thread, adjusting screw just can never be again adjusting after for piston emergence axial displacement, adjusting screw axial float more not promptly to c