Self-bouncing chuck with protection mechanism

The utility model discloses an automatic material bouncing chuck with a protection mechanism, and relates to the technical field of material bouncing chucks. Comprising a collet chuck, a protection device is arranged in the collet chuck, and the protection device comprises a clamping cylinder, a sliding groove, a communicating opening, a connecting cylinder, a sliding rod, a clamping jaw, a clamping rod, a moving rod, a reset spring, a movable rod, a check block and a notch. A clamping cylinder is placed in a cylinder clamp for fixed use, a clamping rod is fixedly connected to a connecting cylinder for fixing, the clamping rod moves through a clamping jaw, and after the clamping jaw is fixed, the clamping rod is fixed at the same time, so that the device is more stable during use; a reset spring is fixedly connected to the inner wall of the connecting cylinder, a movable rod is wound in the reset spring, and the end, away from the clamping jaw, of the movable rod penetrates through the collet and is fixedly c