Large automatic ore unloading device

The utility model discloses a large automatic ore unloading device which comprises a base, a lifting plate, a material receiving groove and a limiting mechanism, a rectangular opening is formed in the upper portion of the base, the lifting plate is arranged at the position of the rectangular opening, the lower portion of the lifting plate is connected with a fixing plate through a hydraulic cylinder, and the limiting mechanism is arranged on the upper portion of the lifting plate. The limiting mechanism comprises a fixed bottom plate, limiting sleeves, limiting force arms, side plates and limiting blocks, the limiting sleeves are symmetrically arranged on the fixed bottom plate, the limiting force arms are arranged in the limiting sleeves, and the side plates and the limiting blocks are arranged on the limiting force arms; a supporting plate and a sun shield are arranged on the upper portion of the stand column. The discharging device is used for solving the problems that in the discharging process of an exis