One-way clutch and two-wheeled vehicle

The one-way clutch comprises a hub, a rotating shaft and a coil spring, the hub is provided with an inner hole, a plurality of inner helical teeth are circumferentially arranged on the inner wall of the hub, the rotating shaft penetrates through the inner hole, the coil spring is located in the inner hole, the inner end of the coil spring is fixedly connected to the rotating shaft, and outer helical teeth are arranged on the outer side wall, away from the rotating shaft, of the coil spring. When the rotating shaft rotates forwards, the outer helical teeth can be meshed with the inner helical teeth, and when the rotating shaft rotates backwards, the outer helical teeth are separated from the inner helical teeth. In the using process of the one-way clutch, when the rotating shaft rotates forwards, the outer helical teeth are meshed with the inner helical teeth, the coil spring expands, and the rotating shaft drives the hub through the coil spring to achieve the transmission function; when the rotating shaft rot