Automatic transmission device for hub production line

The utility model discloses a hub production line automatic transmission device which comprises two pairs of bottom plates, two pairs of first limiting grooves are formed in the upper wall faces of the bottom plates, first sliding blocks are arranged in the first limiting grooves, first limiting pins are arranged on the two side wall faces of each first sliding block, and the first limiting pins are connected into first inner grooves in a sliding mode. A first fixing column is arranged on the upper wall face of the first sliding block, and a pull fixing mechanism is arranged in the second limiting groove. The device relates to the technical field of hub production and is compact in structure, the whole device is borne through the bottom plate, and due to the fact that hub rings of different models have different radiuses and thicknesses, the inner sides of hubs are pre-fixed through the first sliding blocks and the first fixing columns through the first limiting columns and the first springs; and the outer si