Four-core U-shaped large-current adapter

The utility model provides a four-core U-shaped heavy current adapter, which comprises an assembly shell and a U-shaped switching device, a terminal shell comprises a terminal bottom shell and a terminal outer shell, the bottom wall of the terminal bottom shell is provided with an inner ring wall and an outer ring wall, a ring groove is formed between the inner ring wall and the outer ring wall, the inner side of the inner ring wall is provided with a mounting groove, the top wall of the terminal outer shell is provided with an upper ring wall, and the upper ring wall is provided with a lower ring wall. The top wall is provided with two positioning holes in the inner side of the upper ring wall; the terminal shell covers the outer side of the mounting groove and is connected with the terminal bottom shell, the upper ring wall is located in the ring groove, the connecting plate is arranged in the mounting groove, the connecting column penetrates through one positioning hole, the terminal shell is fixedly mount