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    FLUID DYNAMIC-PRESSURE BEARING DEVICE AND SPINDLE MOTOR
    1.
    发明申请
    FLUID DYNAMIC-PRESSURE BEARING DEVICE AND SPINDLE MOTOR 有权
    流体动力压力轴承装置和主轴电机

    公开(公告)号：US20080056104A1

    公开(公告)日：2008-03-06

    申请号：US11926345

    申请日：2007-10-29

    申请人： Hideki Nishimura ,  Yoshito Oku

    发明人： Hideki Nishimura ,  Yoshito Oku

    IPC分类号： F16C32/06 ,  G11B19/20

    CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C41/008 ,  F16C2370/12 ,  H02K7/085

    摘要： A fluid dynamic-pressure bearing includes a rotatable shaft, a hub, a fixed portion, and a lubricating liquid. The hub includes a hub thrust bearing surface extending from the shaft outwardly in a radial direction and an annular surface. The fixed portion includes a fixed-portion upper thrust bearing surface facing the hub thrust surface and a flange surface facing the annular surface. The hub thrust bearing surface, the fixed-portion upper thrust bearing surface, and the lubricating liquid arranged therebetween form together an upper thrust dynamic-pressure bearing. The annular surface and the flange surface define an annular gap therebetween. An axial dimension of the annular gap is larger than a total of an axial dimension of an upper thrust gap between the hub thrust bearing surface and the fixed-portion upper thrust bearing surface and an average depth of upper thrust dynamic-pressure generating grooves of the upper thrust dynamic-pressure bearing.

    摘要翻译： 流体动压轴承包括可旋转轴，轮毂，固定部分和润滑液体。 轮毂包括从轴向径向延伸的轮毂止推轴承表面和环形表面。 固定部分包括面向轮毂止推表面的固定部分上止推轴承表面和面向环形表面的凸缘表面。 轮毂止推轴承表面，固定部分上推力轴承表面和布置在其间的润滑液形成上推力动压轴承。 环形表面和凸缘表面之间形成环形间隙。 环形间隙的轴向尺寸大于轮毂止推轴承表面和固定部分上推力轴承表面之间的上推力间隙的轴向尺寸的总和和上推力动压产生槽的平均深度 上推力动压轴承。

    Spindle motor and disk drive utilizing the spindle motor
    2.
    发明授权
    Spindle motor and disk drive utilizing the spindle motor 有权
    使用主轴电机的主轴电机和磁盘驱动器

    公开(公告)号：US06888278B2

    公开(公告)日：2005-05-03

    申请号：US10604975

    申请日：2003-08-29

    申请人： Hideki Nishimura ,  Yoshito Oku ,  Shinya Yano

    发明人： Hideki Nishimura ,  Yoshito Oku ,  Shinya Yano

    IPC分类号： G11B17/028 ,  G11B17/038 ,  G11B25/04 ,  F16C32/06 ,  H02K7/08

    CPC分类号： G11B25/043 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12 ,  G11B17/028 ,  G11B19/2009 ,  H02K5/1675

    摘要： Low-profile spindle motor whose entire shaft length is utilized to configure, along an encompassing sleeve, a radial dynamic-pressure bearing section. One end of the shaft is unitary with the rotor, and a cover member closes the other end. Between the sleeve upper-end face and the rotor undersurface a thrust bearing section is configured. Micro-gaps are formed continuing between the sleeve upper-end face and the rotor undersurface; the sleeve inner-circumferential surface and the shaft outer-circumferential surface; and the cover member inner face and the shaft end face, where an axial support section is established. Oil continuously fills the micro-gaps, configuring a full-fill hydrodynamic bearing structure. Hydrodynamic pressure-generating grooves in the radial bearing section are configured either so that no axial flow, or so that a unidirectional flow that recirculates from one to the other axial end of the radial bearing section through a communicating pathway is induced in the oil.

    摘要翻译： 低轴主轴电机，其整个轴长度用于沿径向动压轴承部分沿着包围的套筒配置。 轴的一端与转子一体，并且盖构件封闭另一端。 在套筒上端面和转子下表面之间配置有推力轴承部。 在套筒上端面和转子下表面之间形成微缝隙; 套筒内周面和轴外周面; 以及盖构件内表面和轴端面，其中建立了轴向支撑部分。 油连续填充微间隙，构成全填充流体动力轴承结构。 径向轴承部分中的流体动力学压力产生槽被构造成使得不会在油中引起轴向流动，或者使得通过连通通道从径向支承部分的一个轴向端部向另一个轴向端部再循环的单向流动。

    Spindle motor and disk drive furnished therewith
    3.
    发明授权
    Spindle motor and disk drive furnished therewith 有权
    主轴电机和磁盘驱动器配备

    公开(公告)号：US06914358B2

    公开(公告)日：2005-07-05

    申请号：US10250083

    申请日：2003-06-03

    申请人： Shinya Tokunaga ,  Kaoru Uenosono ,  Hideki Nishimura ,  Yoshito Oku

    发明人： Shinya Tokunaga ,  Kaoru Uenosono ,  Hideki Nishimura ,  Yoshito Oku

    IPC分类号： F16C17/10 ,  F16C17/02 ,  F16C17/04 ,  F16C33/10 ,  G11B19/20 ,  H02K5/16 ,  H02K7/08 ,  H02K21/22 ,  G11B17/02 ,  H02K5/00

    CPC分类号： F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C2370/12 ,  H02K5/1675

    摘要： In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the bearing oil. Thrust and radial bearing sections are configured within oil-filled bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage one end of which opens on, radially inwardly along, the thrust bearing section is formed in the bearing member. Either axial ends of the bearing clearance in between the bearing member and shaft communicate through the passage. The communicating passage enables the oil to redistribute itself within the bearing clearances. Pressure difference between the axial upper and lower ends of the oil retained in between the bearing member and the shaft is compensated through the communicating passage, preventing incidents of negative pressure within the oil and of over-lift on the rotor.

    摘要翻译： 在使用具有全填充结构的动压轴承的主轴电机中，轴承构造在大气压力或大于等于或高于轴承油的内部压力的情况下平衡和维持。 推力轴承和径向轴承部分配置在转子，轴和包含轴的中空轴承部件之间的充油轴承间隙内。 在轴承部件上形成有连通通道，其一端在推力轴承部分沿径向向内开口。 轴承构件和轴之间的轴承间隙的轴向端部通过通道连通。 连通通道使得油在轴承间隙内重新分布。 通过连通通道补偿保持在轴承构件和轴之间的油的轴向上端和下端之间的压力差，防止油内的负压和转子上的过度提升。

    DISK DRIVE SPINDLE MOTOR WITH RADIAL INWARD THRUST AREA ANNULAR PRUTRUDING PORTION AND BEARING MEMBER COMMUNICATING PASSAGE
    4.
    发明申请
    DISK DRIVE SPINDLE MOTOR WITH RADIAL INWARD THRUST AREA ANNULAR PRUTRUDING PORTION AND BEARING MEMBER COMMUNICATING PASSAGE 有权
    磁盘驱动主轴电机，带有径向入口扭矩区域环形压缩部件和轴承构件通讯

    公开(公告)号：US20050099722A1

    公开(公告)日：2005-05-12

    申请号：US10605941

    申请日：2003-11-07

    申请人： Hideki Nishimura ,  Yoshito Oku ,  Yasuhiro Mori

    发明人： Hideki Nishimura ,  Yoshito Oku ,  Yasuhiro Mori

    IPC分类号： G11B17/02 ,  G11B17/022 ,  G11B25/04 ,  G11B33/12 ,  H02K7/08

    CPC分类号： G11B33/121 ,  F16C17/045 ,  F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C2370/12 ,  G11B17/022 ,  G11B25/043

    摘要： In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the bearing oil. Thrust and radial bearing sections are configured within oil-filled bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage one end of which opens on, radially inwardly along, the thrust bearing section is formed in the bearing member. Either axial ends of the bearing clearance in between the bearing member and shaft communicate through the passage. The communicating passage enables the oil to redistribute itself within the bearing clearances. Pressure difference between the axial upper and lower ends of the oil retained in between the bearing member and the shaft is compensated through the communicating passage, preventing incidents of negative pressure within the oil and of over-lift on the rotor. And an annular protruding portion is formed on at least one of the end face of the bearing member and the flat face of the rotor at radially inward portion of the thrust bearing section.

    摘要翻译： 在使用具有全填充结构的动压轴承的主轴电机中，轴承构造在大气压力或大于等于或高于轴承油的内部压力的情况下平衡和维持。 推力轴承和径向轴承部分配置在转子，轴和包含轴的中空轴承部件之间的充油轴承间隙内。 在轴承部件上形成有连通通道，其一端在推力轴承部分沿径向向内开口。 轴承构件和轴之间的轴承间隙的轴向端部通过通道连通。 连通通道使得油在轴承间隙内重新分布。 通过连通通道补偿保持在轴承构件和轴之间的油的轴向上端和下端之间的压力差，防止油内的负压和转子上的过度提升。 并且在所述推力轴承部的径向内侧部分的轴承部件的端面和转子的平面中的至少一个上形成有环状的突出部。

    Low profile hydrodynamic motor having minimum leakage properties
    5.
    发明授权
    Low profile hydrodynamic motor having minimum leakage properties 失效
    薄型流体动力马达具有最小的泄漏特性

    公开(公告)号：US5457588A

    公开(公告)日：1995-10-10

    申请号：US122194

    申请日：1993-09-15

    申请人： Shinobu Hattori ,  Yasuhiro Higuchi ,  Yoshito Oku

    发明人： Shinobu Hattori ,  Yasuhiro Higuchi ,  Yoshito Oku

    IPC分类号： G11B19/20 ,  G11B25/04 ,  H02K5/124 ,  H02K5/16 ,  G11B17/02 ,  H02K7/08

    CPC分类号： H02K5/1677 ,  F16C33/74 ,  G11B19/2009 ,  G11B25/043 ,  H02K5/124

    摘要： A spindle motor comprises a rotary sleeve; a rotor hub which is integrally rotated with the rotary sleeve; a stationary sleeve; and a stationary support extending upwardly from the stationary part, the rotary sleeve being fitted onto the outer peripheral surface of the stationary support, and radial and thrust hydrodynamic bearings being provided on the relative sliding surfaces of both rotary sleeve and stationary support. A pair of annular grooves which partially overlap each other in the axial direction are peripherally provided on the rotary sleeve and stationary support, thereby providing a labyrinth chamber to suppress the outflow of the lubricant.

    摘要翻译： 主轴电机包括旋转套筒; 与旋转套筒整体旋转的转子轮毂; 固定套管 以及从静止部分向上延伸的固定支撑件，旋转套筒装配到固定支撑件的外周表面上，并且径向和推力流体动力轴承设置在旋转套筒和固定支撑件的相对滑动表面上。 在轴向上部分地重叠的一对环形槽周向设置在旋转套筒和固定支撑件上，由此提供了一个迷宫室，以抑制润滑剂的流出。

    Fluid dynamic-pressure bearing device and spindle motor
    6.
    发明授权
    Fluid dynamic-pressure bearing device and spindle motor 有权
    流体动压轴承装置和主轴电机

    公开(公告)号：US07290934B2

    公开(公告)日：2007-11-06

    申请号：US11162367

    申请日：2005-09-08

    申请人： Hideki Nishimura ,  Yoshito Oku

    发明人： Hideki Nishimura ,  Yoshito Oku

    IPC分类号： F16C32/06

    CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C41/008 ,  F16C2370/12 ,  H02K7/085

    摘要： Small-size, small-height fluid dynamic-pressure bearing device that causes a low shaft loss and is less prone to troubles such as shortage and leakage of lubricating liquid. A thrust dynamic-pressure bearing is formed at an inner position and a region having a slightly-widened gap is provided outside of the thrust dynamic-pressure bearing to retain the lubricating liquid therein. Further, an oil circulating path is communicated with the region having a slightly widened gap. The gap of this region is set to be greater than the gap at the thrust dynamic-pressure bearing portion by the value of the depth of dynamic-pressure generating grooves. The region having a widened gap may be provided with rows of grooves for stirring-up lubricating oil towards the center.

    摘要翻译： 小尺寸，小高度的流体动压轴承装置，其导致低的轴损失，并且不容易出现诸如润滑液体的不足和泄漏的麻烦。 推力动压轴承形成在内部位置，并且具有稍微加宽的间隙的区域设置在推力动压轴承的外侧，以将润滑液保持在其中。 此外，油循环路径与具有略宽的间隙的区域连通。 通过动压产生槽的深度的值将该区域的间隙设定为大于推力动压轴承部的间隙。 具有加宽间隙的区域可以设置有用于向中心搅动润滑油的一排槽。

    Hydrodynamic bearing, spindle motor using the same and disc drive apparatus provided with spindle motor
    7.
    发明授权
    Hydrodynamic bearing, spindle motor using the same and disc drive apparatus provided with spindle motor 有权
    流体动力轴承，使用相同的主轴电机和配备有主轴电动机的磁盘驱动装置

    公开(公告)号：US07059772B2

    公开(公告)日：2006-06-13

    申请号：US10708758

    申请日：2004-03-24

    申请人： Yoshito Oku ,  Yusuke Matsumoto

    发明人： Yoshito Oku ,  Yusuke Matsumoto

    IPC分类号： F16C32/06

    CPC分类号： F16C33/103 ,  F16C17/107 ,  F16C33/107 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2018

    摘要： The present invention relates to a hydrodynamic bearing supporting a shaft and a sleeve so as to relatively rotate with respect to a rotation axis. In accordance with one example of the present invention, there is provided a hydrodynamic bearing in which a capillary seal portion is formed continuously in a bearing portion having a lubricating oil retained in a micro gap as a working fluid. The capillary seal portion is provided with a first capillary seal portion having a first radial gap, a dimension of the first radial gap being getting at least wider in accordance with increasing a distance from the bearing portion in the rotation axis, and a second capillary seal portion adjoining the first capillary seal portion and having a second radial gap, a dimension of the second radial gap being getting at least wider in accordance with increasing a distance from the bearing portion in the rotation axis. The second capillary seal portion is expanded progressively in accordance with getting toward an outer side in an axial direction.

    摘要翻译： 本发明涉及支撑轴和套筒以相对于旋转轴线相对旋转的流体动力轴承。 根据本发明的一个实例，提供了一种流体动力轴承，其中在具有作为工作流体的微小间隙中保持有润滑油的轴承部分中连续形成毛细管密封部分。 毛细管密封部分设置有具有第一径向间隙的第一毛细管密封部分，第一径向间隙的尺寸根据在旋转轴线上从轴承部分的距离的增加而至少变宽，以及第二毛细管密封件 邻接第一毛细管密封部分并且具有第二径向间隙的部分，第二径向间隙的尺寸根据增加与旋转轴线中的轴承部分的距离而变得至少更宽。 第二毛细管密封部分沿轴向朝向外侧逐渐扩张。

    Spindle motor
    9.
    发明授权
    Spindle motor 失效
    主轴电机

    公开(公告)号：US5559382A

    公开(公告)日：1996-09-24

    申请号：US129658

    申请日：1993-09-30

    申请人： Yoshito Oku ,  Shozo Ibara ,  Shigeharu Sumi ,  Hiromasa Fujii

    发明人： Yoshito Oku ,  Shozo Ibara ,  Shigeharu Sumi ,  Hiromasa Fujii

    IPC分类号： F16C17/02 ,  F16C17/10 ,  F16C33/10 ,  G11B19/20 ,  F16C32/06 ,  H02H7/00 ,  H02H7/08

    CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/107 ,  G11B19/2009 ,  F16C2370/12

    摘要： A motor having a bracket with a stator coil for generating a magnetic field and a rotor hub with rotor magnets for receiving a rotation force from the magnetic field generated by the coil. Upper and lower dynamic pressure radial bearings are formed in between the sleeve and the rotary shaft. The lower end surface of the rotary shaft is formed with a spiral groove in which a lubricating fluid is filled to form a dynamic pressure thrust bearing. The spiral groove is formed by a circular hole at the center of the shaft, and a plurality of curved grooves each curving from the circular hole to the direction opposite to the rotation direction of the shaft and gradually increasing its width toward the outer circumference of the lower end surface of the shaft without reaching the circumference. The spiral groove functions to move the lubricating fluid outward in the radial direction from the center of the shaft, when the shaft rotates.

    摘要翻译： 具有用于产生磁场的具有定子线圈的支架的电动机和具有用于从线圈产生的磁场接收旋转力的转子磁体的转子毂。 上下动压径向轴承形成在套筒和旋转轴之间。 旋转轴的下端面形成有填充有润滑液的螺旋槽，形成动压推力轴承。 螺旋槽由轴的中心的圆孔形成，并且形成有多个弯曲槽，其从圆孔朝向与轴的旋转方向相反的方向弯曲，并且逐渐增大其朝向外周的宽度 轴的下端面没有到达圆周。 当轴旋转时，螺旋槽用于使润滑流体从轴的中心沿径向向外移动。