Cover inlays sleeve pipe of usefulness

The utility model belongs to battery spare part field specificly relates to a cover inlays sleeve pipe of usefulness. A cover inlays sleeve pipe of usefulness, top tube body that includes a body coupling and body down, top tube body is the rotary -table, and the external wall of low tube connects gradually the same last ring body in interval, descends ring body I, descends ring body II, descends ring body III, the external wall an organic whole of fitting with a contraceptive ring is connected with and links up the ring, links up ring outer wall an organic whole and is connected with a plurality of fixed lamellas, and a plurality of fixed lamella evenly distributed are on linking up the ring, down to be connected with the ring protruding for III outer wall upper portion an organic wholes of ring body, and there is an annular groove centre, the sleeve pipe successively adopts casting, cold extrusion, the preparation of the unedged processing method of machine cut to form. The beneficial effects of the utility