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1. 发明授权

US6081057A Spindel motor for a disc drive 失效
标题翻译：用于磁盘驱动器的主轴电机
公开(公告)号：US6081057A
公开(公告)日：2000-06-27
申请号：US349905
申请日：1999-07-08
申请人： Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki , Shoji Moguchi
发明人： Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki , Shoji Moguchi
IPC分类号： F16C21/00 , F16C13/02 , G11B19/20 , H02K5/167 , H02K5/173 , H02K29/00 , H02K5/16
CPC分类号： F16C21/00 , F16C25/086 , H02K5/1737 , F16C17/026 , F16C19/06 , F16C2370/12
摘要： In a spindle motor for a disc drive in which a rotatable body having a disc mounted thereon is rotatively driven by a motor, the rotatable body is rotatably supported on a support member through a ball bearing and a hydrodynamic fluid bearing, and a preload equal to or greater than an axial load of 1N is imparted to the ball bearing.
摘要翻译：在其中具有安装在其上的盘的旋转主体由电动机旋转驱动的盘驱动器的主轴电机中，可旋转体通过球轴承和流体动力流体轴承可旋转地支撑在支撑构件上，并且预压力等于或大于1N的轴向载荷。

2. 发明授权

US06172847B2 Rotational assembly for disc drive device having small runout and reduced axial displacement 失效
标题翻译：具有小跳动和减小的轴向位移的盘驱动装置的旋转组件
公开(公告)号：US06172847B2
公开(公告)日：2001-01-09
申请号：US09049005
申请日：1998-03-27
申请人： Ikunori Sakatani , Katsuhiko Tanaka , Hiromitsu Muraki , Etsuo Maeda , Hideo Okano , Kazuhiro Uemura
发明人： Ikunori Sakatani , Katsuhiko Tanaka , Hiromitsu Muraki , Etsuo Maeda , Hideo Okano , Kazuhiro Uemura
IPC分类号： G11B1702
CPC分类号： F16C17/102 , F16C25/045 , F16C32/0402 , F16C2370/12 , G11B19/2009 , G11B25/043
摘要： A disc drive device includes a rotational assembly which is adapted to mount a disc thereon and is rotatably driven by a motor. The rotational assembly is rotatably supported on a support assembly by a radial hydrodynamic fluid bearing and a thrust bearing. An axial load is applied to the thrust bearing by a magnetic attractive force of up to 30N and is greater than a dead weight of the rotational assembly.
摘要翻译：盘驱动装置包括旋转组件，其适于在其上安装盘并由马达可旋转地驱动。旋转组件通过径向流体动力流体轴承和推力轴承可旋转地支撑在支撑组件上。通过高达30N的磁吸引力将轴向载荷施加到推力轴承，并且大于旋转组件的自重。

3. 发明授权

US06634103B2 Method of stabilizing high-speed control of ball bearing device 失效
标题翻译：稳定球轴承装置高速控制的方法
公开(公告)号：US06634103B2
公开(公告)日：2003-10-21
申请号：US09993710
申请日：2001-11-27
申请人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato , Ikunori Sakatani , Shoji Noguchi
发明人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato , Ikunori Sakatani , Shoji Noguchi
IPC分类号： B21D5310
CPC分类号： F16C35/077 , F16C11/04 , F16C27/04 , F16C2370/12 , Y10T29/49682 , Y10T29/49696
摘要： The locus of the displacement of the centers of the balls of a ball bearing is made elliptical and the radial bearing rigidity of the ball bearing in one radial direction is made greater than the radial bearing rigidity in another radial direction orthogonal to the one radial direction, or at least one of the axial length of the portion on the outer diametral surface of the inner race of the ball bearing which is fitted to a shaft and the axial length of the portion on the outer diametral surface of the outer race of the ball bearing which is fitted to a housing is made ½ or less of the bearing width of the ball bearing, whereby the radial rigidity of a ball bearing device is made very small as compared with the radial rigidity in the prior art. As a result, the stability of a swing arm system can be enhanced and higher speed and higher accuracy of control become possible.
摘要翻译：球轴承的球的中心的位移轨迹被制成椭圆形，并且球轴承在一个径向上的径向承载刚度被制成大于与一个径向正交的另一个径向方向上的径向轴承刚度，或装配在轴上的球轴承的内圈的外径表面上的部分的轴向长度和滚珠轴承外圈的外径表面的部分的轴向长度中的至少一个将其安装到壳体上的距离为球轴承的轴承宽度的1/2以下，由此与现有技术中的径向刚度相比，球轴承装置的径向刚度非常小。结果，可以提高摆臂系统的稳定性，并且可以实现更高的速度和更高的控制精度。

4. 发明授权

US6074098A Hydro-dynamic fluid bearing device and manufacturing method of the same 失效
公开(公告)号：US6074098A
公开(公告)日：2000-06-13
申请号：US388355
申请日：1999-09-01
申请人： Hiromitsu Asai , Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki
发明人： Hiromitsu Asai , Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki
IPC分类号： F16C17/10 , F16C33/10 , F16C33/20
CPC分类号： F16C33/107 , F16C17/026 , F16C17/10 , F16C17/107 , F16C33/20
摘要： A novel hydro-dynamic fluid bearing device is herein disclosed which comprises a cylindrical shaft, a substantially cylindrical bearing member for axially supporting the shaft rotatably in a cylindrical hole having a bottom surface, a supporting member fixed on one side of the shaft and the bearing member, and a rotation member fixed on the other side of the shaft and the bearing member and rotatably supported on the supporting member, grooves for generating hydro-dynamic fluid being formed on at least one of the outer peripheral surface of the shaft and the inner peripheral surface of the cylindrical hole of the bearing member, wherein the bearing member is made of a resin material, and the outer peripheral surface of the substantially cylindrical portion is fixed to an annular reinforcing member having a higher rigidity than the bearing member.

5. 发明授权

US5683183A Spindle device and bearing device therefor 失效
标题翻译：主轴装置及轴承装置
公开(公告)号：US5683183A
公开(公告)日：1997-11-04
申请号：US721345
申请日：1996-09-26
申请人： Katsuhiko Tanaka , Hiromitsu Muraki , Ikunori Sakatani
发明人： Katsuhiko Tanaka , Hiromitsu Muraki , Ikunori Sakatani
IPC分类号： F16C21/00 , F16C33/10 , F16C33/12 , G11B19/20 , F16C32/06
CPC分类号： F16C33/107 , F16C17/026 , F16C21/00 , F16C33/12 , F16C33/122 , G11B19/2009 , F16C2204/20 , F16C2370/12
摘要： A bearing device includes a housing, a shaft arranged in an inner circumference of the housing, and a pair of bearings arranged between the shaft and the housing, and spaced from each other in an axial direction of the shaft, at least one of the bearings comprising a sleeve inserted in the housing and formed cylindrically. The sleeve has an outer layer portion including an outer cylindrical surface and an inner layer portion including an inner cylindrical surface, the outer layer portion being harder than the inner layer portion, the inner cylindrical surface having a groove for generating dynamic pressure. The sleeve is improved in working accuracy, and the dynamic pressure generating grooves can be formed with ease.
摘要翻译：轴承装置包括壳体，布置在壳体的内圆周中的轴和布置在轴和壳体之间并且在轴的轴向彼此间隔开的一对轴承，至少一个轴承包括插入壳体中并形成为圆柱形的套筒。套筒具有包括外圆柱形表面的外层部分和包括内圆柱形表面的内层部分，外层部分比内层部分硬，内圆柱形表面具有用于产生动压的凹槽。该套筒的加工精度提高，能够容易地形成动压产生槽。

6. 发明授权

US6053638A Ball bearing device for a swing arm 失效
标题翻译：用于摆臂的滚珠轴承装置
公开(公告)号：US6053638A
公开(公告)日：2000-04-25
申请号：US14167
申请日：1998-01-27
申请人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato , Ikunori Sakatani , Shoji Noguchi
发明人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato , Ikunori Sakatani , Shoji Noguchi
IPC分类号： F16C27/04 , F16C35/077 , F16C33/58
CPC分类号： F16C35/077 , F16C27/04 , F16C11/04 , Y10T29/49682 , Y10T29/49696
摘要： The locus of the displacement of the centers of the balls of a ball bearing is made elliptical and the radial bearing rigidity of the ball bearing in one radial direction is made greater than the radial bearing rigidity in another radial direction orthogonal to the one radial direction, or at least one of the axial length of the portion on the inner diametral surface of the inner race of the ball bearing which is fitted to a shaft and the axial length of the portion on the outer diametral surface of the outer race of the ball bearing which is fitted to a housing is made 1/2 or less of the bearing width of the ball bearing, whereby the radial rigidity of a ball bearing device is made very small as compared with the radial rigidity in the prior art. As a result, the stability of a swing arm system can be enhanced and higher speed and higher accuracy of control become possible.
摘要翻译：球轴承的球的中心的位移轨迹被制成椭圆形，并且球轴承在一个径向上的径向承载刚度被制成大于与一个径向正交的另一个径向方向上的径向轴承刚度，或装配在轴上的球轴承的内圈的内径面上的部分的轴向长度和滚珠轴承的外圈外径表面部分的轴向长度中的至少一个与球轴承的轴承宽度相比，安装在壳体上的+ E为1/2 + EE或更小，因此与现有技术中的径向刚度相比，球轴承装置的径向刚度非常小艺术。结果，可以提高摆臂系统的稳定性，并且可以实现更高的速度和更高的控制精度。

7. 发明授权

US6033118A Hydro-dynamic fluid bearing device and manufacturing method of the same 失效
标题翻译：水力动力流体轴承装置及其制造方法相同
公开(公告)号：US6033118A
公开(公告)日：2000-03-07
申请号：US33781
申请日：1998-03-03
申请人： Hiromitsu Asai , Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki
发明人： Hiromitsu Asai , Katsuhiko Tanaka , Ikunori Sakatani , Hiromitsu Muraki
IPC分类号： F16C17/10 , F16C33/10 , F16C33/20 , F16C17/02
CPC分类号： F16C33/107 , F16C17/026 , F16C17/10 , F16C17/107 , F16C33/20
摘要： A novel hydro-dynamic fluid bearing device is herein disclosed which comprises a cylindrical shaft, a substantially cylindrical bearing member for axially supporting the shaft rotatably in a cylindrical hole having a bottom surface, a supporting member fixed on one side of the shaft and the bearing member, and a rotation member fixed on the other side of the shaft and the bearing member and rotatably supported on the supporting member, grooves for generating hydro-dynamic fluid being formed on at least one of the outer peripheral surface of the shaft and the inner peripheral surface of the cylindrical hole of the bearing member, wherein the bearing member is made of a resin material, and the outer peripheral surface of the substantially cylindrical portion is fixed to an annular reinforcing member having a higher rigidity than the bearing member.
摘要翻译：本文公开了一种新型的液压动态流体轴承装置，其包括圆柱形轴，用于沿轴向支撑轴的基本圆柱形的轴承构件，该轴承可旋转地安装在具有底表面的圆柱形孔中，固定在轴的一侧上的支撑构件和轴承以及旋转构件，其固定在所述轴的另一侧和所述轴承构件上，并且可旋转地支撑在所述支撑构件上，用于产生流体动力流体的槽形成在所述轴的外周表面和所述内部轴承构件的圆筒孔的外周面，其中，所述轴承构件由树脂材料制成，并且所述大致圆筒形部分的外周面固定到具有比所述轴承构件更高的刚性的环形加强构件。

8. 发明授权

US06461050B2 Ball bearing device for a swing arm 失效
标题翻译：用于摆臂的滚珠轴承装置
公开(公告)号：US06461050B2
公开(公告)日：2002-10-08
申请号：US10042691
申请日：2002-01-02
申请人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato
发明人： Hiromitsu Muraki , Katsuhiko Tanaka , Shigeru Endo , Chuichi Sato
IPC分类号： F16C3358
CPC分类号： F16C35/077 , F16C11/04 , F16C27/04 , F16C2370/12 , Y10T29/49682 , Y10T29/49696
摘要： The locus of the displacement of the centers of the balls of a ball bearing is made elliptical and the radial bearing rigidity of the ball bearing in one radial direction is made greater than the radial bearing rigidity in another radial direction orthogonal to the one radial direction, or at least one of the axial length of the portion on the inner diametral surface of the inner race of the ball bearing which is fitted to a shaft and the axial length of the portion on the outer diametral surface of the outer race of the ball bearing which is fitted to a housing is made ½ or less of the bearing width of the ball bearing, whereby the radial rigidity of a ball bearing device is made very small as compared with the radial rigidity in the prior art. As a result, the stability of a swing arm system can be enhanced and the higher speed and higher accuracy of control become possible.
摘要翻译：球轴承的球的中心的位移轨迹被制成椭圆形，并且球轴承在一个径向上的径向承载刚度被制成大于与一个径向正交的另一个径向方向上的径向轴承刚度，或装配在轴上的球轴承的内圈的内径面上的部分的轴向长度和滚珠轴承的外圈外径表面部分的轴向长度中的至少一个将其安装到壳体上的距离为球轴承的轴承宽度的1/2以下，由此与现有技术中的径向刚度相比，球轴承装置的径向刚度非常小。结果，可以提高摆臂系统的稳定性，并且可以实现更高的速度和更高的控制精度。

9. 发明授权

US06761485B2 Rolling bearing unit 有权
公开(公告)号：US06761485B2
公开(公告)日：2004-07-13
申请号：US10187306
申请日：2002-07-01
申请人： Hiromitsu Muraki , Takafumi Yasuhara
发明人： Hiromitsu Muraki , Takafumi Yasuhara
IPC分类号： F16C3360
CPC分类号： G11B5/4813 , F16C19/54 , F16C35/061
摘要： Two bearings 3, 4 are used to rotatably support the pivot 1 with reference to a fixed shaft. The swing arm 5 is highly precisely fixed to the pivot 1. The outer diameter 4b of the outer race 4a of the lower bearing 4 is larger than the outer diameter 3b of the outer race 3a of the upper bearing 3. The end surface of the outer race 4b of the outer race 4a of the lower bearing 4 and the outer periphery 3b of the outer race 3a of the upper ball bearing 3 are used as a reference surface to fix the swing arm 5. The housing used in the prior art is eliminated from the structure according to the present invention to reduce the number of parts.

10. 发明授权

US06709162B2 Rolling bearing unit 失效
标题翻译：滚动轴承单元
公开(公告)号：US06709162B2
公开(公告)日：2004-03-23
申请号：US10011267
申请日：2001-12-06
申请人： Hiromitsu Muraki , Norihiro Aoki , Norikazu Kitagawa
发明人： Hiromitsu Muraki , Norihiro Aoki , Norikazu Kitagawa
IPC分类号： F16C4304
CPC分类号： F16C35/06 , F16C19/06 , F16C19/545 , F16C2229/00 , Y10T29/49696 , Y10T29/497
摘要： A rolling-bearing unit comprising a pair of bearing assembled such that the tolerance range of the radial clearance or contact angle of the ball bearings is divided into a plurality of divisions, and that a pair of ball bearings is selected from the same division, and that a pre-load, which is set according to the division, is applied to the selected pair of ball bearings as they are installed in the unit.
摘要翻译：一种滚动轴承单元，包括一对组装的轴承，使得球轴承的径向间隙或接触角的公差范围被分成多个分段，并且从相同的分割中选择一对球轴承，并且根据分割设置的预载荷被安装在单元中时被施加到所选择的一对滚珠轴承。

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