Efficient machining device for hydraulic motor workpiece

The invention discloses an efficient machining device for a hydraulic motor workpiece, relates to the field of motor shell machining, solves the problem that an existing claw disc is poor in reverse clamping stability for a special-shaped motor shell, and comprises a claw disc body and three clamping claws which are installed at the upper end of the claw disc body in a sliding mode and are distributed at equal intervals in the circumferential direction. Three clamping jaws are arranged on the outer wall of the jaw disc body, adjusting bolts capable of adjusting the three clamping jaws are further arranged on the outer wall of the jaw disc body, protruding blocks are fixedly installed at the ends, close to the circle center of the jaw disc body, of the clamping jaws, and the sides, away from the circle center of the jaw disc body, of the protruding blocks are arc surfaces. When the motor shell is in use, the movable rod can be triggered through the transmission mechanism, so that the rubber block is ejected ou