Clamping device for bearing inner ring

The utility model relates to a clamping device for a bearing inner ring. The clamping device comprises a conical shaft assembly, a positioning piece, a clamping plate and a bolt. The positioning piece comprises a cylindrical abutting portion and a cylindrical assembling portion, the diameter of the assembling portion is consistent with the inner diameter of the bearing inner ring, and the diameter of the abutting portion is larger than the inner diameter of the bearing inner ring and smaller than the outer diameter of the bearing inner ring. The assembling part is provided with an assembling part threaded hole. The clamping plate and the abutting part are consistent in diameter. The clamping plate is provided with a clamping plate threaded hole. The other end of the cone shaft assembly is connected with the abutting part. The bearing inner ring is arranged on the assembling part in a sleeving mode, the bolt sequentially penetrates through the clamping plate threaded hole and the assembling part threaded hole,