| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing device of a wheel bearing which reduces the fuel consumption of a vehicle by lowering the torque of a pack seal, and elongates a life by maintaining seal performance.SOLUTION: In a sealing device of a wheel bearing, an external peripheral face of an inner ring 25 is formed of only: a small-diameter face 23a into which a cylinder part 15a of a slinger 15 is pressure-inserted; a pair of axial lips 17a, 17b which are constituted of a stepped part 26 protruding to the outside of the radial direction from the small-diameter face 23a, and in which a wall face 26a of the stepped part 26 is set at an inclination angle α within a range of 45° to 60° with respect to an external peripheral face of the stepped part 26, and a plurality of seal lips of a seal member 17 are inclined and extended to an inner side at the outside of the radiation direction from an end part of an inside-diameter part 16b of a core metal 16, and slide-contact with a side face of an outer side of an erecting plate part 15b of the slinger 15; and an axial lip 17c which is inclined and extended to an outer side at the outside of the radial direction from the end part of the inside-diameter part 16b of the core metal 16, and slide-contacts with the wall face 26a of the stepped part 26. |
