| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bearing device with its quietness improved by suppressing wind noise and the like. SOLUTION: An external peripheral surface 12a of an inner ring 12 is extended to the outside of the direction of the axis from the end face of an outer ring 11, and shaped into an expansive diameter that expands towards a ball 13. By feeding lubricating oil ejected together with air and fed to the external peripheral surface 12a of the inner ring 12 to the ball 13 along the external peripheral surface 12a by mans of a centrifugal force, wind noise can be reduced, preserving the volume of lubricating oil per unit time that is fed into an angular-contact ball bearing 10.</p> |
