Clamping and overturning mechanism for shaft machining

The utility model discloses a clamping turnover mechanism for shaft processing, which comprises an opening and closing power mechanism, a rotating mechanism and a clamping mechanism, the clamping mechanism comprises a pair of symmetrically arranged clamping structures and a third power mechanism for driving the clamping structures to open and close, and the clamping structures are arranged on the rotating mechanism; the clamping structure comprises a fixing disc in running fit with the third power mechanism and a plurality of arc-shaped clamping plates arranged on the fixing disc at intervals in the circumferential direction, and the third power mechanism drives the arc-shaped clamping plates to move back and forth along radial guide grooves of the fixing disc. According to the device, safe clamping and overturning of the shaft piece are achieved, safety is improved, machining of the shaft piece is facilitated, and machining efficiency of the shaft piece is improved; the rotating mechanism can drive the whole