Clamping appts

The utility model discloses a clamping appts, its characterized in that: the on -line screen storage device comprises a base, fixed mounting left side baffle, right baffle on the base, left side baffle left side face -to -face mounting cylinder, the pull rod is connected to the cylinder, be equipped with the connecting piece on the baffle of the right side, the connecting piece passes right baffle, connecting piece left end installation fixed plate, the pull rod is connected to the fixed plate, the connecting piece right -hand member is equipped with fixed cover, fixed sheatheeing in is equipped with the U -shaped groove. The utility model is simple and reasonable in structure, low in manufacturing cost, the clamping is quick, convenient, can improve the precision of work piece, fixed cover adopts the design of U -shaped groove, and because of certain thickness that fixed cover itself has, work piece pole portion puts into the U -shaped inslot and can not drop, the fixed plate is connected to the cylinder, and fixed cover is connected to the fixed plate, and the cylinder is automatic to draw in or release fixed cover, and the terminal surface of work piece is inseparable with the end face contaction of right baffle, fixed cover, and the clamping is convenient, has more improved the work piece precision.