Wheel end structure of vehicle and axle assembly

The utility model discloses a wheel end structure of a vehicle and an axle assembly. The wheel end structure of the vehicle comprises an axle, a hub, an inner bearing, an outer bearing and a locking nut assembly. The hub is mounted on the axle through the inner bearing and the outer bearing; the end part of the axle is provided with an external thread which is provided with a key slot; the locking nut assembly comprises a shaft head nut, a retaining washer and a clamping piece. The retaining washer is arranged on the axle in a sleeving mode and arranged on the outer side end face of the inner ring of the outer bearing in a pressing mode, a clamping piece is arranged on the retaining washer, and a plurality of clamping grooves are formed in the retaining washer in the circumferential direction of the retaining washer; the shaft head nut is screwed on the external thread and is pressed on the outer side of the retaining washer; the clamping piece comprises an elastic clamping part, one end of the elastic clampi