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1. 发明授权

US06686673B1 Bearing structures, spindle motor, and hard disk drive 失效
标题翻译：轴承结构，主轴电机和硬盘驱动器
公开(公告)号：US06686673B1
公开(公告)日：2004-02-03
申请号：US09744160
申请日：2001-03-15
申请人： Osamu Komura , Makoto Otsuki , Kaoru Murabe
发明人： Osamu Komura , Makoto Otsuki , Kaoru Murabe
IPC分类号： H02K516
CPC分类号： H02K7/09 , F16C17/10 , F16C41/002 , F16C2202/32 , F16C2370/12 , G11B19/20 , G11B19/2009 , G11B25/043 , G11B33/14 , G11B33/1493 , H02K7/085 , H02K7/086 , H02K11/40
摘要： A hydrodynamic gas bearing structure and a hard disk drive (HDD) including a hydrodynamic gas bearing structure are provided in which electrostatic charge built up in the rotatable components is safely discharged to the fixed components. A conductive structure is installed between the rotatable and fixed components at or in the vicinity of the axis of rotation of the rotatable components. The conductive structure provides a safe discharge path for electrostatic charge dissipation. The conductive structure located at or in the vicinity of the axis of the rotation is barely influenced by the relative rotation between the rotatable and fixed components as well as air flow for generating hydrodynamic pressure. The conductive structure can be a magnetic fluid or a conductive, flexible strip. In a HDD a dummy disk and a dummy head are provided to dissipate electrostatic charge.
摘要翻译：提供了一种流体动力气体轴承结构和包括流体动力气体轴承结构的硬盘驱动器（HDD），其中构成在可旋转部件中的静电电荷被安全地排放到固定部件。导电结构安装在可旋转部件的旋转轴线附近或附近的可旋转部件和固定部件之间。导电结构为静电荷耗散提供了安全的放电路径。位于旋转轴线处或附近的导电结构几乎不受旋转和固定部件之间的相对旋转以及用于产生流体动力压力的气流的影响。导电结构可以是磁性流体或导电的柔性条带。在HDD中，设置虚拟磁盘和虚拟磁头以消散静电电荷。

2. 发明授权

US06417590B1 Spindle motor 有权
标题翻译：主轴电机
公开(公告)号：US06417590B1
公开(公告)日：2002-07-09
申请号：US09786861
申请日：2001-03-12
申请人： Osamu Komura , Hisao Takeuchi , Makoto Otsuki , Kaoru Murabe
发明人： Osamu Komura , Hisao Takeuchi , Makoto Otsuki , Kaoru Murabe
IPC分类号： H02K708
CPC分类号： F16C17/107 , F16C17/026 , F16C25/045 , F16C33/1015 , F16C39/063 , F16C2370/12 , G11B19/2009 , H02K7/086 , H02K7/09
摘要： There is provided a means for preventing wear caused by the contacting/sliding of a thrust hydrodynamic gas bearing surface when a spindle motor is started. A cylinder 4 of a radial hydrodynamic gas bearing that has radial hydrodynamic grooves in an outer circumferential surface thereof and a disk 3 of a thrust hydrodynamic gas bearing that has thrust hydrodynamic grooves in an upper face thereof are disposed on an upper end of an axial center of a stator core 2 having a stator 2a around which a motor coil 7 is wound, a hollow cylinder 6 whose inner surface facing the cylinder 4 of the radial hydrodynamic gas bearing is smooth and a rotor magnet 8 facing the motor coil 7 are disposed on a hub 5 acting as a rotational member, a load in a radial direction is supported by the radial hydrodynamic gas bearing, and a load in a thrust direction is supported by using the thrust hydrodynamic gas bearing together with a magnetic bearing consisting of the stator 2a and the rotor magnet 8.
摘要翻译：提供了一种用于在主轴电动机起动时防止由推力流体动力气体轴承表面的接触/滑动引起的磨损的装置。径向流体动力气体轴承的圆柱体4设置在轴向中心的上端，径向流体动力气体轴承在其外圆周表面中具有径向流体动力槽，并且具有在其上表面具有推力流体动力槽的推力流体动力气体轴承的盘3 定子铁芯2具有卷绕电动机线圈7的定子2a，与径向流体动力气体轴承的气缸4相对的内表面平滑的中空圆筒6和面向电机线圈7的转子磁体8设置在用作旋转构件的轮毂5，径向载荷由径向流体动力气体轴承支撑，并且通过使用推力流体动力气体轴承以及由定子2a组成的磁性轴承来支撑推力方向的负载和转子磁体8。

3. 发明授权

US07033078B2 Hydrodynamic bearing assembly and spindle motor having the same 失效
标题翻译：流体动力轴承组件和主轴电机具有相同的功能
公开(公告)号：US07033078B2
公开(公告)日：2006-04-25
申请号：US10852267
申请日：2004-05-25
申请人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
发明人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
IPC分类号： F16C32/06
CPC分类号： F16C33/1065 , F16C17/026 , F16C17/045 , F16C17/107 , F16C23/04 , F16C33/102 , F16C2370/12 , G02B26/121 , G11B19/2009 , G11B19/2018 , H02K7/085 , H02K7/086
摘要： This invention is to provide a hydrodynamic bearing assembly, which realizes the high rotation rate in a stable manner and the robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing the contact in the thrust bearing. The thrust bearing is a pomp-out type one, and the radial bearing has offset grooves on the surface thereof to supply the fluid flow sufficiently to the thrust bearing. The grooves also eliminate a half-whirl. A depth ratio relative to the diameter of bearing is preferably 0.005 or less to avoid the reduced translation rigidity. The radial gap is smoothly enlarged from the center to both ends along the axis, and the shaft is biased to incline the shaft relative to the sleeve, so that the shaft can be rotated with the robust rigidity. Also, a pair of the thrust bearings is provided on both ends of the radial bearing so as to realize the robust rigidity.
摘要翻译：本发明提供一种流体动力轴承组件，其以稳定的方式实现高旋转速度和坚固的刚性。流体动力轴承组件具有3微米或更小的总径向间隙，以防止推力轴承中的接触。推力轴承是一种推力轴承，而径向轴承在其表面上具有偏移槽，以将流体流充分地提供给止推轴承。凹槽也消除了一半的旋转。相对于轴承的直径的深度比优选为0.005以下，以避免降低的平移刚度。径向间隙沿着轴线从中心到两端平滑地扩大，并且轴被偏置以相对于套筒倾斜轴，使得轴能够以坚固的刚度旋转。此外，一对推力轴承设置在径向轴承的两端，以实现坚固的刚性。

4. 发明授权

US06749339B1 Hydrodynamic bearing assembly and spindle motor having the same 有权
标题翻译：流体动力轴承组件和主轴电机具有相同的功能
公开(公告)号：US06749339B1
公开(公告)日：2004-06-15
申请号：US09830997
申请日：2001-08-07
申请人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
发明人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
IPC分类号： F16C3206
CPC分类号： F16C33/1065 , F16C17/026 , F16C17/045 , F16C17/107 , F16C23/04 , F16C33/102 , F16C2370/12 , G02B26/121 , G11B19/2009 , G11B19/2018 , H02K7/085 , H02K7/086
摘要： This invention is to provide a hydrodynamic bearing assembly, which realizes the high rotation rate in a stable manner and the robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing the contact in the thrust bearing. The thrust bearing is a pomp-out type one, and the radial bearing has offset grooves on the surface thereof to supply the fluid flow sufficiently to the thrust bearing. The grooves also eliminate a half-whirl. A depth ratio relative to the diameter of bearing is preferably 0.005 or less to avoid the reduced translation rigidity. The radial gap is smoothly enlarged from the center to both ends along the axis, and the shaft is biased to incline the shaft relative to the sleeve, so that the shaft can be rotated with the robust rigidity. Also, a pair of the thrust bearings is provided on both ends of the radial bearing so as to realize the robust rigidity.
摘要翻译：本发明提供一种流体动力轴承组件，其以稳定的方式实现高旋转速度和坚固的刚性。流体动力轴承组件具有3微米或更小的总径向间隙，以防止推力轴承中的接触。推力轴承是一种推力轴承，而径向轴承在其表面上具有偏移槽，以将流体流充分地提供给止推轴承。凹槽也消除了一半的旋转。相对于轴承的直径的深度比优选为0.005以下，以避免降低的平移刚度。径向间隙沿着轴线从中心到两端平滑地扩大，并且轴被偏置以相对于套筒倾斜轴，使得轴能够以坚固的刚度旋转。此外，一对推力轴承设置在径向轴承的两端，以实现坚固的刚性。

5. 发明申请

US20080170815A1 Hydrodynamic bearing assembly 审中-公开
标题翻译：流体动力轴承总成
公开(公告)号：US20080170815A1
公开(公告)日：2008-07-17
申请号：US12073919
申请日：2008-03-12
申请人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
发明人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
IPC分类号： F16C32/06
CPC分类号： F16C33/1065 , F16C17/026 , F16C17/045 , F16C17/107 , F16C23/04 , F16C33/102 , F16C2370/12 , G02B26/121 , G11B19/2009 , G11B19/2018 , H02K7/085 , H02K7/086
摘要： This invention provides a hydrodynamic bearing assembly which realizes a high rotation rate in a stable manner with robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing contact with the thrust bearing. The thrust bearing is a pump-out type, and the radial bearing has offset grooves on the surface thereof to supply fluid flow to the thrust bearing. A depth ratio of the grooves relative to the diameter of the shaft is preferably 0.005 or less to avoid reduced translational rigidity.
摘要翻译：本发明提供了一种流体动力轴承组件，其以稳定的方式实现高转速，具有坚固的刚性。流体动力轴承组件具有3微米或更小的总径向间隙，以防止与推力轴承接触。推力轴承是抽出式的，径向轴承在其表面上具有偏移槽，以向推力轴承提供流体流。凹槽相对于轴的直径的深度比优选为0.005或更小，以避免降低的平移刚性。

6. 发明授权

US06870289B1 Dynamic-pressure bearing and spindle motor comprising the same 失效
标题翻译：动压轴承和主轴电动机组成
公开(公告)号：US06870289B1
公开(公告)日：2005-03-22
申请号：US09720671
申请日：2000-04-28
申请人： Makoto Otsuki , Osamu Komura , Kaoru Murabe
发明人： Makoto Otsuki , Osamu Komura , Kaoru Murabe
IPC分类号： F16C17/10 , F16C33/10 , H02K7/08 , H02K5/12
CPC分类号： F16C33/107 , F16C17/026 , F16C17/107 , F16C2370/12 , H02K7/085 , H02K7/086
摘要： A bearing having a high thrust rigidity, an excellent vibration resistance, and a simple structure, as well as a spindle motor using such a bearing are provided. A groove or grooves 7 are disposed to either one of a shaft 2 and a sleeve 3 which form a radial bearing portion, to thereby exert thrust force in a direction which brings two mutually facing members at a thrust bearing portion closer to each other. The groove 7 is inclined with respect to an axis, and the inclination exerts, between the shaft 2 and the sleeve 3, thrust force in a thrust direction. The groove 7 may be herringbone-shaped or other type of groove which can generates such thrust force. It is also possible to further enhance the thrust force utilizing a negative pressure, with an upstream side of the radial bearing portion for introducing fluid such as air shielded from outside air.
摘要翻译：提供具有高推力刚性，优异的抗振性和简单结构的轴承以及使用这种轴承的主轴电动机。凹槽或凹槽7设置在形成径向支承部分的轴2和套筒3中的任一个上，从而在使两个彼此相对的构件在推力轴承部分彼此更靠近的方向上施加推力。槽7相对于轴线倾斜，并且倾斜在轴2和套筒3之间施加推力方向的推力。凹槽7可以是能够产生这种推力的人字形或其他类型的凹槽。也可以利用负压进一步提高推力，径向轴承部分的上游侧用于引入诸如外部空气屏蔽的空气的流体。

7. 发明授权

US06702464B1 Dynamic pressure bearing with improved starting characteristics 失效
公开(公告)号：US06702464B1
公开(公告)日：2004-03-09
申请号：US09856093
申请日：2001-08-16
申请人： Hisao Takeuchi , Osamu Komura , Kaoru Murabe , Makoto Otsuki
发明人： Hisao Takeuchi , Osamu Komura , Kaoru Murabe , Makoto Otsuki
IPC分类号： F16C1710
CPC分类号： F16C33/107 , F16C17/045 , F16C2370/12 , G02B26/121 , G11B19/2009 , H02K7/086
摘要： A hydrodynamic bearing assembly with improved activation features is provided. The opposing surfaces in the radial and thrust bearings have grooves 2 and 5 with depths shallower gradually towards the downstream flow of the fluid passing therethrough, for generating the uniform dynamic pressure distribution. This allows the dynamic pressure distribution to be leveled so as to increase the bearing supporting force and prevent the dew grom being generated. Any one or both of the opposing surfaces in the thrust bearing has the inclined surface from the inner portion towards the outer portion so that the gap between the opposing surfaces is extended to about 2 microns. This causes the contacting points thereof when halted to be closer to the axis so that the friction can be reduced and the driving torque can be reduced when restating the bearing assembly. This also prevent the contact in the thrust bearing due to the external oscillating motion. Further, a second thrust plate 11 is secured on the other end surface of the sleeve 3 opposite to the thrust plate 4 so that the total weight of the rotational member is supported between the second thrust plate 11 and the end surface of the shaft 1 when halted, thereby reducing the friction at the time of activating.

8. 发明授权

US06771459B1 Spindle motor and hard disc drive incorporating the same 失效
标题翻译：主轴电机和包含其的硬盘驱动器
公开(公告)号：US06771459B1
公开(公告)日：2004-08-03
申请号：US09561341
申请日：2000-04-28
申请人： Osamu Komura , Makoto Otsuki , Kaoru Murabe
发明人： Osamu Komura , Makoto Otsuki , Kaoru Murabe
IPC分类号： G11B1702
CPC分类号： H02K7/086 , G11B19/2009
摘要： A spindle motor includes a fixed base member, an outer cylindrical member made from a hollow tube, and an inner cylindrical member inserted in said outer cylindrical member. The inner and outer cylindrical members are arranged so that one of the outer and inner cylindrical member is fixed to the base member and the other is rotatable about a longitudinal axis thereof. A bearing assembly is provided for bearing the rotatable cylindrical member on the fixed cylindrical member. Also, drive means is provided for rotating the rotatable cylindrical member about the fixed cylindrical member. In particular, the fixed cylindrical member is made of ceramic.
摘要翻译：主轴电动机包括固定基座构件，由中空管制成的外圆柱形构件和插入所述外圆筒构件中的内圆柱构件。内筒体和外筒部件被布置成使得外圆筒件和内筒件中的一个固定到基件上，而另一个可绕其纵向轴线旋转。轴承组件被提供用于将可旋转的圆柱形构件支承在固定圆柱形构件上。而且，提供驱动装置用于使可旋转圆柱形构件围绕固定圆柱形构件旋转。特别地，固定圆柱形构件由陶瓷制成。

9. 发明授权

US07360950B2 Hydrodynamic bearing assembly 有权
公开(公告)号：US07360950B2
公开(公告)日：2008-04-22
申请号：US11293103
申请日：2005-12-05
申请人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
发明人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
IPC分类号： F16C32/06
CPC分类号： F16C33/1065 , F16C17/026 , F16C17/045 , F16C17/107 , F16C23/04 , F16C33/102 , F16C2370/12 , G02B26/121 , G11B19/2009 , G11B19/2018 , H02K7/085 , H02K7/086
摘要： This invention provides a hydrodynamic bearing assembly which realizes a high rotation rate in a stable manner with robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing contact with the thrust bearing. The thrust bearing is a pump-out type, and the radial bearing has offset grooves on the surface thereof to supply fluid flow to the thrust bearing. A depth ratio of the grooves relative to the diameter of the shaft is preferably 0.005 or less to avoid reduced translational rigidity.

10. 发明申请

US20060072864A1 Htdrodynamic bearing assembly and spindle motor having the same 有权
标题翻译： HTDR动力轴承组件和主轴电机具有相同的功能
公开(公告)号：US20060072864A1
公开(公告)日：2006-04-06
申请号：US11293103
申请日：2005-12-05
申请人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
发明人： Kaoru Murabe , Makoto Otsuki , Osamu Komura , Hisao Takeuchi
IPC分类号： F16C32/06
CPC分类号： F16C33/1065 , F16C17/026 , F16C17/045 , F16C17/107 , F16C23/04 , F16C33/102 , F16C2370/12 , G02B26/121 , G11B19/2009 , G11B19/2018 , H02K7/085 , H02K7/086
摘要： This invention is to provide a hydrodynamic bearing assembly, which realizes the high rotation rate in a stable manner and the robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing the contact in the thrust bearing. The thrust bearing is a pomp-out type one, and the radial bearing has offset grooves on the surface thereof to supply the fluid flow sufficiently to the thrust bearing. The grooves also eliminate a half-whirl. A depth ratio relative to the diameter of bearing is preferably 0.005 or less to avoid the reduced translation rigidity. The radial gap is smoothly enlarged from the center to both ends along the axis, and the shaft is biased to incline the shaft relative to the sleeve, so that the shaft can be rotated with the robust rigidity. Also, a pair of the thrust bearings is provided on both ends of the radial bearing so as to realize the robust rigidity.
摘要翻译：本发明提供一种流体动力轴承组件，其以稳定的方式实现高旋转速度和坚固的刚性。流体动力轴承组件具有3微米或更小的总径向间隙，以防止推力轴承中的接触。推力轴承是一种推力轴承，而径向轴承在其表面上具有偏移槽，以将流体流充分地提供给止推轴承。凹槽也消除了一半的旋转。相对于轴承的直径的深度比优选为0.005以下，以避免降低的平移刚度。径向间隙沿着轴线从中心到两端平滑地扩大，并且轴被偏置以相对于套筒倾斜轴，使得轴能够以坚固的刚度旋转。此外，一对推力轴承设置在径向轴承的两端，以实现坚固的刚性。

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