| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing device moving an inner ring of a bearing in an axial direction by thermal displacement of seats between inner rings with a simple structure and inhibiting change of preload due to the thermal displacement. Ž<P>SOLUTION: The seat 8 between the inner rings is composed of material having larger thermal expansion coefficient than thermal expansion coefficient of a rotary shaft 5, a spacer 7 is composed of material having smaller thermal expansion coefficient than thermal expansion coefficient of the rotary shaft 5. Difference ΔL1 of displacement between the seat 8 between the inner ring thermally displaced by heat generated at bearings 3, 4 by rotation of the rotary shaft 5 and the rotary shaft 5 near the seat between the inner ring are offset by difference ΔL2 of displacement of the space 7 thermally displaced by the heat and the rotary shaft 5 near the spacer 7. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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