| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a conical dynamic pressure bearing device, and to excellently enhance the performance thereof at a low cost. SOLUTION: In the conical dynamic pressure bearing device, a fluid pressurizing means 13e to pressurize a lubrication fluid in the pressing direction toward the inner side of an inclined bearing space BS is continuously provided on an opening part located on the outer circumferential side of the substantially conical inclined bearing space BS formed in a space between both inclined dynamic pressure surfaces of a bearing sleeve 13 and a shaft bush 21, the pressurized lubrication fluid is pressed into the inner side from the outer circumferential side of the inclined bearing space BS by the fluid pressurizing means 13e to excellently generate the dynamic pressure in the lubrication fluid in the inclined bearing space BS irrespective of the opening angle of the inclined dynamic pressure surfaces, and the lubrication fluid to flow outwardly from the opening part on the outer circumferential side of the inclined bearing space BS is stably held in the inclined bearing space BS by the rotational centrifugal force. COPYRIGHT: (C)2005,JPO&NCIPI
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