Quick-changing device for automatic bending gripper of robot

The invention relates to a robot automatic bending gripper quick-changing device which comprises a main disc and an auxiliary disc, the main disc comprises a main disc body, a piston cavity is formed in the center of the main disc body, a guide seat is arranged at the front end of the piston cavity, a guide column is arranged at the front end of the guide seat, a guide cavity is formed in the center in the front end of the guide column, a guide rod is arranged in the guide cavity, and a piston is arranged in the piston cavity; a plurality of side holes are formed in the circumference of the side wall of the guide cavity, steel balls are placed in the side holes, a chamfer is arranged on the front end face of the guide rod, a positioning hole is formed in the center of the auxiliary disc, a conical groove is formed in the inner wall of the positioning hole, and a front air inlet hole is formed in the inner wall of the rear side of the piston cavity. The inner wall of the front side of the piston cavity is prov