Numerical control crankshaft lathe fixture eccentricity measuring device

The utility model discloses an eccentricity measuring device for a numerical control crankshaft lathe fixture. The device comprises a base disc, a moving disc and a screw, a moving disc is mounted at the upper part of the base disc; the upper part of the moving disc is fixedly connected with a clamp body; a locking bolt is mounted at the upper part of the moving disc; an adjusting lead screw is arranged at the upper part of the moving disc; a mounting hole is formed in the upper part of the base disc; a vertically-arranged screw rod is fixedly connected to the interior of the mounting hole; a scale is mounted at the upper part of the screw; the upper part of the screw is in threaded connection with a positioning nut; the upper part of the moving disc is fixedly connected with a positioning rod; the device adjusts the positioning nut according to eccentric distance requirements of crankshafts of different specifications, eliminates errors during clamp measurement, meets crankshaft machining precision use requi