| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel bearing device which includes a seal with improved seal performance and consequently can maintain bearing performance for a long period of time.SOLUTION: A metal ring 12 comprises: a fitting part 12a which externally fits onto a shoulder part 4e of a hub ring 4; a curved part 12b formed into a circular shape; a disc part 12c which extends radially outward, and is brought into close contact with a side surface 6c of a wheel mounting flange 6; and a bent part 12d which separates from the outside diameter part of the disc part 12c with respect to the side surface 6c, and extends radially outward. A synthetic rubber-made circular deflector member 15 is joined to the bent part 12d by vulcanization adhesion, and the deflector member 15 comprises a bevel part 16 having: an outside diameter surface 16a which covers an external peripheral face 2c of a cylindrical end part of an outer member 2, and is formed into a tapered shape so as to gradually diametrically reduce toward an inner side from a base part 15a of the deflector member 15; and an inside diameter part 16b which is formed into a cylindrical surface. A labyrinth clearance δ is formed between the inside diameter surface 16b and the external peripheral face 2c of the outer member 2. |
