发明授权
US07448805B2 Thrust dynamic pressure bearing, spindle motor using thereof, and information recording/reproducing device using the spindle motor
有权
推力动压轴承，使用其的主轴电机以及使用主轴电动机的信息记录/再现装置
- 专利标题： Thrust dynamic pressure bearing, spindle motor using thereof, and information recording/reproducing device using the spindle motor
- 专利标题（中）： 推力动压轴承，使用其的主轴电机以及使用主轴电动机的信息记录/再现装置
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申请号： US10587567申请日： 2005-10-31
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公开(公告)号： US07448805B2公开(公告)日： 2008-11-11
- 发明人: Hiromi Kita , Shigeo Obata , Kenichi Miyamori , Hiromitsu Noda
- 申请人： Hiromi Kita , Shigeo Obata , Kenichi Miyamori , Hiromitsu Noda
- 申请人地址： JP Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： McDermott Will & Emery LLP
- 优先权： JP2004-318959 20041102
- 国际申请： PCT/JP2005/019971 WO 20051031
- 国际公布： WO2006/049114 WO 20060511
- 主分类号： F16C32/06
- IPC分类号： F16C32/06
摘要：
A thrust dynamic pressure bearing with high inclination-resistant rigidity against axis runout and additionally low bearing loss torque is implemented. Herringbone grooves (131) having intermediate bends (132) are provided on rotating-side bearing surface (11) provided on the rotating-side bearing member. When rotating-side bearing surface (11) rotates in direction A (clockwise), lubricating oil generates dynamic pressure in an area centering on intermediate bend (132) along radially outer part (133) and radially inner part (134) of herringbone groove (131). As a result that groove width (G) of a dynamic pressure generating groove and width (L) of a land adjacent to the dynamic pressure generating groove holds G>L at an arbitrary radius (2) position, a thrust dynamic pressure bearing with high inclination-resistant rigidity and additionally low bearing loss torque is provided.
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