| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fluid dynamic-pressure bearing device capable of easily measuring a filling level of lubricant and reducing the risk of leakage of lubricant. <P>SOLUTION: This fluid dynamic-pressure bearing device comprises a shaft 1, a bearing sleeve 20 capable of rotating the shaft 1 by the lubricant 7, and a cover cap 30 covering an upper end side of the bearing sleeve 20 and an outer peripheral face part of an area adjacent to the upper end face side, and having a lubricant storage gap part 5. The bearing sleeve 20 and the cover cap 30 are connected in a state of forming a bearing gap 4 with respect to the shaft 1, and at least a part of the lubricant 7 is filled in the lubricant storage gap part 5. An outer peripheral face part of the bearing sleeve 20 is provided with an oil guide groove 21 extended approximately in the axial direction of the bearing sleeve 20 and capable of measuring the lubricant filling level in the lubricant storage gap part 5, and the lubricant can be poured to the lubricant storage gap part 5 from one end part of the oil guide groove 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
