Recycling device for automatically taking packaging auxiliary materials at top of tray

The recycling device for automatically taking the packaging auxiliary materials at the top of the tray comprises a machine frame, a transmission belt, a cover unloading bin, a rack, a gear, a crossing frame, a belt frame, a belt wheel, a belt, a bottom plate, a suction cup frame, a large suction cup, a spring, a distance measuring instrument and a controller, the machine frame is a rectangular machine frame, the space surrounded by the machine frame is divided into two parts of space, and the transmission belt penetrates through the two parts of space. Four belt pulleys are respectively arranged at four corners of the rectangular rack through belt frames, belts are arranged between the two belt pulleys, two ends of a crossing frame are respectively arranged between the two belts, a gear is arranged on the crossing frame, the gear is meshed with a vertical rack, a bottom plate is arranged at the lower end of the rack, a suction cup frame is fixed at the lower end of the bottom plate, and the suction cup frame