High-performance elevator main shaft transmission accessory

The utility model discloses a high-performance elevator main shaft transmission accessory, which relates to the technical field of elevators and comprises a bottom plate, a main shaft transmission unit, a belt tensioning unit and a stop unit. The bottom plate is rectangular; the main shaft transmission unit comprises a motor supporting plate, a motor, a transmission belt, a belt pulley, first vertical supporting plates and an elevator main shaft body, and the two ends of the upper surface of one end of the bottom plate are fixedly connected with the lower ends of the two correspondingly-matched first vertical supporting plates correspondingly; the side faces of the upper ends of the two first vertical supporting plates are rotationally connected with the side faces of the two ends of the elevator main shaft body correspondingly, and one end of the upper surface of the other end of the bottom plate is fixedly connected with the lower end of a motor supporting plate. After the transmission belt is used for a lo