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公开(公告)号：US08143751B2
公开(公告)日：2012-03-27
申请号：US12697641
申请日：2010-02-01
IPC分类号： H02K7/00
CPC分类号： H02K1/28 , G11B19/2009 , H02K1/2786 , H02K15/03
摘要： A rotor unit includes a substantially circular plate shaped cover portion, a rotor hub including a lower cylinder portion, and a magnetic field generating member attached on the lower cylinder portion. An annular salient portion is provided on the lower surface of the cover portion 31. The annular salient portion lies radial inwards of the lower opening of the through-hole of the cover portion and protrudes downwards in the shape of a ring whose center coincides with the central axis. The magnetic field generating member includes a rotor magnet and a back iron covering the outer surface and upper surface of the rotor magnet. When the magnetic field generating member is mounted to the rotor hub, the upper portion of the back iron comes in contact with the annular salient portion, which determines the axial position of the magnetic field generating member.
摘要翻译： 转子单元包括大致圆形的板状盖部，包括下筒部的转子轮毂和安装在下筒部上的磁场产生部件。 在盖部31的下表面上设置有环状的突出部。环状凸部位于盖部的贯通孔的下开口的径向内侧，向下方突出成环状，其中心与 中心轴。 磁场产生部件包括转子磁体和覆盖转子磁体的外表面和上表面的后铁。 当磁场发生部件安装在转子轮毂上时，后铁的上部与环形突出部分接触，这决定了磁场产生部件的轴向位置。
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2.发明授权Fluid dynamic pressure bearing device, spindle motor and disk drive apparatus 有权流体动压轴承装置，主轴电机和磁盘驱动装置公开(公告)号：US08284515B2
公开(公告)日：2012-10-09
申请号：US13197820
申请日：2011-08-04
申请人： Yoichi Sekii , Hironao Sasaki , Takuro Iguchi , Hironori Ando , Toshihiro Akiyama , Takunori Shinao , Yuichi Shigematsu , Yasutaka Ino , Tatsuyoshi Nakatani
发明人： Yoichi Sekii , Hironao Sasaki , Takuro Iguchi , Hironori Ando , Toshihiro Akiyama , Takunori Shinao , Yuichi Shigematsu , Yasutaka Ino , Tatsuyoshi Nakatani
IPC分类号： G11B17/08
CPC分类号： G11B19/2036 , F16C17/105 , F16C17/107 , F16C33/107 , F16C2370/12 , G11B17/0287
摘要： A fluid dynamic bearing mechanism includes a stationary shaft, a sleeve portion arranged to rotate with respect to the shaft, and a thrust portion including an upper end surface arranged oppose to a lower end surface of the sleeve portion. An inside surface of the thrust portion includes an inside surface contact portion arranged in contact with an outside surface of the shaft, and an inside surface lower non-contact portion spaced away from the outside surface of the shaft, and arranged to extend downward from a lower end of the inside surface contact portion. An outside surface of the thrust portion includes an outside surface inclined portion arranged in contact with an interface of a lubricating oil. The lower end of the inside surface contact portion is arranged at a level axially higher than that of a lower end of the outside surface inclined portion.
摘要翻译： 流体动力轴承机构包括固定轴，布置成相对于轴旋转的套筒部分和包括与套筒部分的下端表面相对布置的上端表面的推力部分。 推力部的内表面包括与轴的外表面接触的内表面接触部分和与轴的外表面间隔开的内表面下非接触部分，并且布置成从轴向向下延伸 内表面接触部分的下端。 推力部的外表面包括与润滑油的界面接触配置的外表面倾斜部。 内表面接触部分的下端设置在比外表面倾斜部分的下端更高的轴向上。
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3.发明授权Fluid dynamic pressure bearing device, spindle motor and disk drive apparatus 有权流体动压轴承装置，主轴电机和磁盘驱动装置公开(公告)号：US08284513B2
公开(公告)日：2012-10-09
申请号：US12765122
申请日：2010-04-22
申请人： Yoichi Sekii , Hironao Sasaki , Takuro Iguchi , Hironori Ando , Toshihiro Akiyama , Takunori Shinao , Yuichi Shigematsu
发明人： Yoichi Sekii , Hironao Sasaki , Takuro Iguchi , Hironori Ando , Toshihiro Akiyama , Takunori Shinao , Yuichi Shigematsu
IPC分类号： G11B17/08
CPC分类号： F16C17/107 , F16C17/105 , F16C33/107 , F16C33/745 , F16C43/02 , F16C2370/12 , G11B17/0287
摘要： A bearing mechanism includes a shaft, a sleeve portion, a thrust portion, and a cover portion. Lubricating oil is arranged in a communicating channel in the sleeve portion, a thrust gap between the sleeve portion and the thrust portion, and a tapered gap between an outside surface of the thrust portion and the cover portion. A lower end opening of the communicating channel is defined in an outer circumferential portion of a lower surface of the sleeve portion radially outward of the thrust gap. A radially outermost portion of the thrust portion is arranged either tangent to a wall surface of the communicating channel or closer to a central axis than the wall surface. The tapered gap is arranged closer to the central axis than a radially outermost point of the wall surface. The outer circumferential portion and the cover portion define a guide gap therebetween.
摘要翻译： 轴承机构包括轴，套筒部分，推力部分和盖部分。 润滑油布置在套筒部分的连通通道中，套筒部分和推力部分之间的推力间隙以及推力部分的外表面与盖部分之间的锥形间隙。 连通通道的下端开口被限定在径向向外推动间隙的套筒部分的下表面的外圆周部分中。 推力部分的径向最外部分布置成与连通通道的壁表面相切或者比壁表面更靠近中心轴线。 锥形间隙布置成比壁表面的径向最外侧更靠近中心轴线。 外周部和盖部在其间限定引导间隙。
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公开(公告)号：US20100202080A1
公开(公告)日：2010-08-12
申请号：US12697641
申请日：2010-02-01
CPC分类号： H02K1/28 , G11B19/2009 , H02K1/2786 , H02K15/03
摘要： A rotor unit includes a substantially circular plate shaped cover portion, a rotor hub including a lower cylinder portion, and a magnetic field generating member attached on the lower cylinder portion. An annular salient portion is provided on the lower surface of the cover portion 31. The annular salient portion lies radial inwards of the lower opening of the through-hole of the cover portion and protrudes downwards in the shape of a ring whose center coincides with the central axis. The magnetic field generating member includes a rotor magnet and a back iron covering the outer surface and upper surface of the rotor magnet. When the magnetic field generating member is mounted to the rotor hub, the upper portion of the back iron comes in contact with the annular salient portion, which determines the axial position of the magnetic field generating member.
摘要翻译： 转子单元包括大致圆形的板状盖部，包括下筒部的转子轮毂和安装在下筒部上的磁场产生部件。 在盖部31的下表面上设置有环状的突出部。环状凸部位于盖部的贯通孔的下开口的径向内侧，向下方突出成环状，其中心与 中心轴。 磁场产生部件包括转子磁体和覆盖转子磁体的外表面和上表面的后铁。 当磁场发生部件安装在转子轮毂上时，后铁的上部与环形突出部分接触，这决定了磁场产生部件的轴向位置。
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5.发明申请FLUID DYNAMIC PRESSURE BEARING DEVICE, SPINDLE MOTOR AND DISK DRIVE APPARATUS 有权流体动力压力轴承装置，主轴电机和磁盘驱动装置公开(公告)号：US20110299193A1
公开(公告)日：2011-12-08
申请号：US13197820
申请日：2011-08-04
申请人： Yoichi SEKII , Hironao SASAKI , Takuro IGUCHI , Hironori ANDO , Toshihiro AKIYAMA , Takunori SHINAO , Yuichi SHIGEMATSU , Yasutaka INO , Tatsuyoshi NAKATANI
发明人： Yoichi SEKII , Hironao SASAKI , Takuro IGUCHI , Hironori ANDO , Toshihiro AKIYAMA , Takunori SHINAO , Yuichi SHIGEMATSU , Yasutaka INO , Tatsuyoshi NAKATANI
CPC分类号： G11B19/2036 , F16C17/105 , F16C17/107 , F16C33/107 , F16C2370/12 , G11B17/0287
摘要： A fluid dynamic bearing mechanism includes a stationary shaft, a sleeve portion arranged to rotate with respect to the shaft, and a thrust portion including an upper end surface arranged oppose to a lower end surface of the sleeve portion. An inside surface of the thrust portion includes an inside surface contact portion arranged in contact with an outside surface of the shaft, and an inside surface lower non-contact portion spaced away from the outside surface of the shaft, and arranged to extend downward from a lower end of the inside surface contact portion. An outside surface of the thrust portion includes an outside surface inclined portion arranged in contact with an interface of a lubricating oil. The lower end of the inside surface contact portion is arranged at a level axially higher than that of a lower end of the outside surface inclined portion.
摘要翻译： 流体动力轴承机构包括固定轴，布置成相对于轴旋转的套筒部分和包括与套筒部分的下端表面相对布置的上端表面的推力部分。 推力部的内表面包括与轴的外表面接触的内表面接触部和与轴的外表面间隔开的内表面下非接触部，并且从内侧面向下延伸 内表面接触部分的下端。 推力部的外表面包括与润滑油的界面接触配置的外表面倾斜部。 内表面接触部分的下端设置在比外表面倾斜部分的下端更高的轴向上。
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6.发明申请FLUID DYNAMIC PRESSURE BEARING DEVICE, SPINDLE MOTOR AND DISK DRIVE APPARATUS 有权流体动力压力轴承装置，主轴电机和磁盘驱动装置公开(公告)号：US20100195250A1
公开(公告)日：2010-08-05
申请号：US12765122
申请日：2010-04-22
申请人： Yoichi SEKII , Hironao SASAKI , Takuro IGUCHI , Hironori ANDO , Toshihiro AKIYAMA , Takunori SHINAO , Yuichi SHIGEMATSU
发明人： Yoichi SEKII , Hironao SASAKI , Takuro IGUCHI , Hironori ANDO , Toshihiro AKIYAMA , Takunori SHINAO , Yuichi SHIGEMATSU
CPC分类号： F16C17/107 , F16C17/105 , F16C33/107 , F16C33/745 , F16C43/02 , F16C2370/12 , G11B17/0287
摘要： A bearing mechanism includes a shaft, a sleeve portion, a thrust portion, and a cover portion. Lubricating oil is arranged in a communicating channel in the sleeve portion, a thrust gap between the sleeve portion and the thrust portion, and a tapered gap between an outside surface of the thrust portion and the cover portion. A lower end opening of the communicating channel is defined in an outer circumferential portion of a lower surface of the sleeve portion radially outward of the thrust gap. A radially outermost portion of the thrust portion is arranged either tangent to a wall surface of the communicating channel or closer to a central axis than the wall surface. The tapered gap is arranged closer to the central axis than a radially outermost point of the wall surface. The outer circumferential portion and the cover portion define a guide gap therebetween.
摘要翻译： 轴承机构包括轴，套筒部分，推力部分和盖部分。 润滑油布置在套筒部分的连通通道中，套筒部分和推力部分之间的推力间隙以及推力部分的外表面与盖部分之间的锥形间隙。 连通通道的下端开口被限定在径向向外推动间隙的套筒部分的下表面的外圆周部分中。 推力部分的径向最外部分布置成与连通通道的壁表面相切或者比壁表面更靠近中心轴线。 锥形间隙布置成比壁表面的径向最外侧更靠近中心轴线。 外周部和盖部在其间限定引导间隙。
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