Excircle grinding clamp of high-power impact-resistant motor rotor shaft

The utility model discloses an excircle grinding fixture for a high-power impact-resistant motor rotor shaft. The excircle grinding fixture comprises a connecting block, a clamping block and a chuck,the connecting block and the clamping block are arranged in parallel, and an elastic mechanism is connected between the connecting block and the clamping block. The clamping head is detachably connected to the clamping block, an annular hole is formed in the clamping head, and at least two convex teeth are arranged on the inner annular surface of the annular hole; the connecting block, the clamping block and the chuck are all annular, the connecting block, the clamping block and the chuck are concentrically arranged, and a plurality of mounting holes are formed in the connecting block; the elastic mechanism comprises a screw and a spring, a stepped hole is formed in the clamping block, and a threaded hole is formed in the connecting block. When in use, the hobbing at the end part of the motor rotor shaft is insert