| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lightweight roll bearing device for supporting a wheel hardly causing various problems such as the insufficiency of rigidity, creep, a preload loss and stripping due to striking of a rolling element. Ž<P>SOLUTION: The rolling bearing device 1 for supporting the wheel includes a hub ring 2 having a first inside raceway surface 20a on the outer peripheral surface; an inner ring 3 having a second inside raceway surface 20b on the outer peripheral surface and integrally fixed to the hub ring 2; an outer ring 4 having a first outside raceway surface 21a and a second outside raceway surface 21b facing the first inside raceway surface 20a and the second inside raceway surface 20b; and two rows of rolling elements 5, 5 arranged in a rollable manner between the first inside raceway surface 20a and the first outside raceway surface 21a and between the second inside raceway surface 20b and the second outside raceway surface 21b. The inner diameter side member 31 of the outer ring 4 is composed of carbon steel, and the outer diameter side member 32 is composed of a light alloy composite material that contains a light alloy containing aluminum or magnesium and hard particles which are a reinforcing material. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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