Quick turnover door mechanism

The utility model provides a rapid turnover door mechanism which comprises a machine frame, the machine frame comprises a plurality of cross beams and a plurality of stand columns, the two sides of the machine frame are respectively provided with an installation plate, a driving shaft is arranged between the two installation plates, a speed reduction motor is arranged on the driving shaft, drivingwheels are arranged at the two ends of the driving shaft, and a driven shaft is arranged above the machine frame. Driven wheels in transmission connection with the driving wheels are arranged at thetwo ends of the driven shaft, an overturning arm assembly is arranged on the driven shaft and comprises a mounting pipe, a connecting pipe, a first clamping piece and a second clamping piece, two sliding connection grooves distributed front and back are formed in the lower surface of the second clamping piece, and four pairs of rotating supporting pieces are symmetrically arranged on the inner side of the rack. And the mov