| CPC F16C 33/7823 (2013.01) [F16C 33/7883 (2013.01); F16J 15/3232 (2013.01)] | 10 Claims |
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1. A sealing device for sealing an annular gap between an inner ring and an outer ring of a hub bearing, the sealing device comprising:
a slinger having a cylindrical portion configured to be mounted on the inner ring, and an outward flange that is provided on an end of the cylindrical portion; and
a seal body configured to be mounted on the outer ring and includes a reinforcing ring and an elastic seal formed from an elastomer material and provided integrally with the reinforcing ring,
wherein the elastic seal includes:
a main lip;
a side lip that extends radially outwardly and toward an opposite side to a sealing target space, and contacts the outward flange;
an intermediate lip that is provided between the main lip and the side lip, extends radially outwardly and toward the opposite side to the sealing target space, and contacts the outward flange,
a first annular recess formed between the side lip and the intermediate lip; and
a second annular recess formed along an outer peripheral surface of the side lip, wherein
the second annular recess is recessed in a central axis direction of the inner ring and toward the sealing target space side by a greater depth than the first annular recess; and
wherein a bottom of the second annular recess is positioned farther toward the sealing target space side in the central axis direction of the inner ring than a surface of the reinforcing ring outward flange on the side to which the outer ring is fitted,
wherein the reinforcing ring includes a trunk portion having a convex shape oppositely facing and protruding towards the bottom of the second annular recess, and
wherein the convex shape spans an entire length of the bottom of the second annular recess in a direction perpendicular to the central axis direction of the inner ring.
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