| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device attaining further silence by suppressing noise such as wind-ripping sound. SOLUTION: An outer peripheral surface 12a of an inner ring 12 is extended axially outward from the end face of an outer ring 11 and formed to be enlarged in diameter toward a ball 13. Lubricating oil jetted with air and supplied to the outer peripheral surface 12a of the inner ring 12 is supplied along the outer peripheral surface 12a to the ball 13 by centrifugal force. The wind-ripping sound can thereby be reduced while maintaining the amount of lubricating oil per unit time supplied into an angular contact ball bearing 10. COPYRIGHT: (C)2008,JPO&INPIT
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