Four-claw linkage self-centering clamp

The utility model relates to a four-claw linkage self-centering clamp, and relates to the technical field of clamps. The device comprises a mounting block, four mounting grooves are formed in the upper end of the mounting block, the four mounting grooves are radially distributed with the circle center of the mounting block as the starting point, a rotating disc is rotationally connected into the mounting block, and four sliding grooves are evenly formed in the upper end wall of the rotating disc in the circumferential direction; the sliding grooves deviate from the circle center of the rotating disc, the deviation angles of the four sliding grooves are consistent, the mounting grooves correspond to the sliding grooves one to one and communicate with the sliding grooves, the mounting blocks are provided with rotating assemblies used for driving the rotating disc to rotate, clamping blocks are inserted into the mounting grooves and can slide in the mounting grooves, and the bottoms of the clamping blocks are in