| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device for a wheel capable of preventing local stress concentration generated on a base end part outer peripheral surface of a wheel faucet part. SOLUTION: This bearing device for the wheel is furnished with an inner shaft 1 having a flange part 4 on which a wheel side member 5 is mounted on an outer side end part 10. It has the cylindrical wheel faucet part 6 formed to project from an inner diametrical side part of the flange part 4. An outer round surface part 21 continuing outward in the radial direction from an outer peripheral surface 23 of the wheel faucet part 6 is formed on the base end part side of the wheel faucet part 6, and an inner round surface part 22 continuing inward in the radial direction from an inner peripheral surface 19 of the wheel faucet part 6 is formed. A radius R<SB>2</SB>of the inner round surface part 22 is specified as smaller than a radius R<SB>1</SB>of the outer round surface part 21. COPYRIGHT: (C)2007,JPO&INPIT
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