| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure capable of preventing creep of an outer ring 22 of a rolling bearing 11 against an outer hub 14 and excessive preload of the rolling bearing regardless of temperature change at low cost. SOLUTION: A cylindrical spacer 25 is provided between an inner circumference surface of the outer hub 14 and an outer circumference surface of the outer ring 22. The spacer 25 is fitted to both members 14, 22 with interference fit. Linear expansion coefficient of metal material composing the spacer 25 is a middle value between linear expansion coefficient of metal material composing the outer hub 14 and linear expansion coefficient of metal material composing the outer ring 22.
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