Auxiliary gate unit for uncovered refueling and uncovered refueling device

The invention relates to the technical field of automobile refueling devices, and provides a cover-free refueling auxiliary gate unit and a cover-free refueling device.The auxiliary gate unit comprises an auxiliary gate shell, a gate structure and a refueling gun guide rail, and the gate structure is fixedly arranged in an auxiliary gate cavity; the oil gun guide rail is fixedly arranged in the auxiliary gate cavity. In the first direction, one end of the gate structure abuts against the inner wall of one end of the auxiliary gate cavity, and the other end of the gate structure abuts against one end of the oil gun guide rail. The gate structure is of a single-door structure, water and dust are prevented from entering the gate structure, it can be ensured that the gate is tightly closed in the non-refueling state, waterproof and dustproof effects are achieved, time and labor are saved, and the situation of unscrewing is avoided; meanwhile, when the oil gun is inserted, the stability of the gate structure is im