The utility model belongs to the field of mechanical clamping jaws, and particularly relates to a flexible feeding mechanical clamping jaw which comprises a three-axis pneumatic jaw, the bottom of the three-axis pneumatic jaw is fixedly connected with a fixing plate, the top of the fixing plate is provided with a spring
piston, the bottom of the fixing plate is rotationally connected with a transition connector, and a tire is arranged on one side of the transition connector. According to the three-shaft pneumatic claw, the fixing plate drives the transition joints to move through the three flexible and controllable structures, the transition joints can clamp a tire, so that feeding treatment of the tire is achieved, the spring
piston is located on the upper side of the fixing plate, the size of the spring
piston can be adjusted on the fixing plate, and the size of the spring piston can be adjusted. The three-axis pneumatic claw can clamp tires with different outer
diameter sizes, the three-axis pneumatic claw is more flexible, meanwhile, the angle of the transition connector can be adjusted at the bottom of the fixing plate, the transition connector can be better attached to the surfaces of the tires, grabbing is more stable, and positioning is accurate.