发明名称 |
HYDRODYNAMIC BEARING DEVICE AND DISK ROTATING APPARATUS |
摘要 |
In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.
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申请公布号 |
US2008304776(A1) |
申请公布日期 |
2008.12.11 |
申请号 |
US20080188545 |
申请日期 |
2008.08.08 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ASADA TAKAFUMI;SAITO HIROAKI;YOSHITSUGU TAKAO;KUSAKA KEIGO;KIRIYAMA HIROYUKI;ITO DAISUKE |
分类号 |
F16C32/06;F16C17/10;F16C33/10;G11B17/02 |
主分类号 |
F16C32/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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