Elastic three-jaw clamp compatible with multiple apertures

The utility model relates to an elastic three-jaw clamp compatible with multiple apertures. The elastic three-jaw clamp comprises a mounting base and a supporting disc mounted on the mounting base. A through hole is formed in the middle of the supporting disc, a conical shaft sliding up and down is arranged in the through hole, the middle of the conical shaft is in threaded connection with a screw, the screw is rotationally connected with the mounting base, an elastic chuck is arranged between the conical shaft and the through hole, and a plurality of long-strip-shaped opening seams are evenly formed in the elastic chuck in the radial direction; a plurality of fixing claw heads are evenly arranged in the circumferential direction of the elastic chuck, the fixing claw heads are connected with the supporting disc in a sliding mode, an outer diameter chuck is fixedly arranged on the supporting disc, the inner diameter of the outer diameter chuck is larger than the diameter of the through hole, and a plurality of