| 摘要 |
PURPOSE: A wheel bearing assembly is provided to improve durability and lubricating performance through preventing the oil leak of grease in the wheel bearing assembly from the gap of an outer ring and a rolling element. CONSTITUTION: A wheel bearing assembly comprises a hub(110), an inner ring(120), a outer ring(130), and a rolling element(130). The hub comprises a first inner ring track formed in an outboard and a stepped pulley formed in an inboard. The first inner ring track comprises a first base formed in the outermost portion of radius. The inner ring is installed in the stepped pulley of the hub and comprises a second inner ring track. The outer ring covers the hub and an inner ring. The stepped portion of an outboard comprises a first outer ring track corresponding to the first inner ring track and the stepped portion of an inboard comprises second outer ring tracks(139a,139b) corresponding to the second inner ring track. The rolling element is installed between the first inner ring track and first outer ring track, and the second inner ring track and the second outer ring track. |
