Follow-up angle adjusting device for blade plate of vertical windmill

The invention provides a follow-up angle adjusting device for a blade plate of a vertical windmill. The device comprises a rotating seat, wherein a rotating shaft serving as a power output shaft is vertically arranged on the rotating seat, a rotating frame is fixedly arranged in the circumferential direction of the rotating shaft, the blade plate is hinged to the rotating frame, a conical base gear concentric with the rotating shaft is fixedly arranged on the rotating seat, a conical driven gear is coaxially and fixedly arranged on a hinge shaft of the blade plate, bevel gears are coaxially arranged at the two ends of a transmission shaft with an axis direction located on the horizontal plane, the two bevel gears mesh with the conical base gear and the conical driven gear correspondingly,the transmission ratio of the conical base gear to the conical driven gear is 2: 1, and the cone bottoms of the conical base gear and the conical driven gear face the same direction. An follow-up angle is adjusted through the