Rear axle hub structure and automobile

The rear axle hub structure comprises a driving assembly, a bearing assembly and an axle housing assembly, the driving assembly comprises a hub flange, a driving shaft and a locking piece, a through hole is formed in the hub flange in the axial direction in a penetrating mode, and the periphery of the hub flange is concaved inwards in the radial direction to form an annular roller path; the driving shaft is inserted into the through hole and exposed out of the free end, the locking piece is connected with the free end, the side, close to the free end, of the hub flange is connected with a wheel of an automobile, the bearing assembly comprises a rolling piece and an outer ring arranged on the periphery of the annular roller path in a sleeving mode, and the rolling piece is clamped between the outer ring and the annular roller path. The side, away from the free end, of the outer ring extends outwards in the axial direction to form a positioning boss, the axle housing assembly comprises an axle housing flange, t