| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing device which can prevent the shortage of an oil member at a roll-traveling part when using a bearing which grease-lubricates by being sealed by sealing devices at high-speed rotation, and a rotating shaft device using the same. <P>SOLUTION: In the bearing device composed of: an inner ring 22; an outer ring 21; a plurality of balls 23 arranged between the inner ring 22 and the outer ring 21; a retainer 24 for retaining the balls 23; the annular sealing devices 29 arranged at axial ends of the inner ring 22 and the outer ring 21; and grease sealed into a space surrounded by the inner ring 22, the outer ring 21 and the sealing devices 29, the bearing device comprises at least one piezoelectric actuator 61 which imparts vibration to the sealing devices 29, and a control part 72 which controls the vibration of the piezoelectric actuator 61. <P>COPYRIGHT: (C)2012,JPO&INPIT |
