| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wheel-bearing device, in which the sealing performance of a seal is improved and whose bearing performance can be maintained for a long period of time. Ž<P>SOLUTION: A base part 6b of a wheel mounting flange 6 is formed in the shape of an arc, a metal ring 12 is fitted against the base part 6b, and a seal 8 having side lips 14a, 14b is brought into sliding contact. The metal ring 12 is equipped with a cylindrical fitting part 12a fit externally to a shoulder part 4e of a hub wheel 4, a curved part 12b formed as an arc that corresponds to the shape of the base part 6b, a circular disk part 12c that extends outward in the radial direction from the curved part and closely contacts the side surface 6c of the wheel mounting flange 6, and an umbrella part 12d that extends from the outer diameter part, separated in the axial direction with respect to the wheel mounting flange 6. The umbrella part 12d is disposed facing along the peripheral edge of the outer side of an external member 2, with a slight annular gap A intervening, and multiple exhaust holes 15 are formed at equal intervals in the circumferential direction of the umbrella part 12d, with at least one disposed at the position closest to the road surface. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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