| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing device for a wheel capable of preventing generation of worn particles, burrs and scraps when press-fitting a serrated shank portion of a hub bolt in a bolt hole of a flange. SOLUTION: A bolt hole 60 is formed through a flange 22 of a hub wheel 20 having a hub spindle 21 with a rolling bearing 31 assembled thereto. A serrated shank portion 73 to be press-fitted into the bolt hole 60 is formed on a root side of a shank portion 72 of a hub bolt 70 for mounting a wheel. A chamfered part 61 with the predetermined angleθ1 of inclination with respect to the center axis is formed at an opening part on a press-fitting entrance side of the bolt hole 60. A chamfered part 74 with the angleθ2 of inclination smaller than the angleθ1 of inclination with respect to the center axis is formed at a press-fitting fore end of the serrated shank portion 73. COPYRIGHT: (C)2008,JPO&INPIT
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