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1. 发明授权

US06264368B1 Fluid bearing motor 失效
标题翻译：流体轴承电机
公开(公告)号：US06264368B1
公开(公告)日：2001-07-24
申请号：US09333954
申请日：1999-06-16
申请人： Katsuhiko Tanaka , Ikunori Sakatani , Kazuhiro Uemura
发明人： Katsuhiko Tanaka , Ikunori Sakatani , Kazuhiro Uemura
IPC分类号： F16C3206
CPC分类号： F16C33/103 , F16C33/10 , F16C2370/12 , G11B19/2009
摘要： A fluid bearing motor having sufficient room for securing an air chamber for use in quickly discharging bubbles that have entered a thrust fluid bearing and a reservoir for supplying a lubricating fluid to the thrust fluid bearing. Moreover, the fluid bearing motor can easily be fabricated. The fluid bearing motor includes a shaft member 1, a sleeve 2 cooperating with the shaft member and a thrust collar 3 which is fixed to the shaft member 1 and extended in the diametric direction. The circumferentially-directed contour of the outer peripheral face of the thrust collar 3 is made elliptic, so that a reservoir 8 and an air chamber 9 are formed between the outer peripheral face of the thrust collar 3 and the face 4a of the mating member (sleeve).
摘要翻译：流体轴承马达具有足够的空间，用于固定用于快速排放进入推力流体轴承的气泡的空气室和用于向推力流体轴承供应润滑流体的储存器。此外，可以容易地制造流体轴承马达。流体轴承电动机包括轴构件1，与轴构件配合的套筒2和固定到轴构件1并沿直径方向延伸的止推环3。止推环3的外周面的周向定向轮廓被制成椭圆形，从而在止推环3的外周面与配合构件的表面4a之间形成储存器8和空气室9（袖）。

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

US5882122A Rolling bearing and spindle apparatus 失效
标题翻译：滚动轴承和主轴设备
公开(公告)号：US5882122A
公开(公告)日：1999-03-16
申请号：US958449
申请日：1997-10-27
申请人： Shoji Noguchi , Katsuhiko Tanaka , Ikunori Sakatani , Keisuke Kimura , Kazuhiro Uemura , Hiroshi Nakajima , Toru Takamizawa
发明人： Shoji Noguchi , Katsuhiko Tanaka , Ikunori Sakatani , Keisuke Kimura , Kazuhiro Uemura , Hiroshi Nakajima , Toru Takamizawa
IPC分类号： F16C19/08 , F16C19/16 , F16C19/54 , F16C21/00 , F16C25/06 , F16C33/30 , F16C33/32 , F16C35/06 , F16C35/12 , G11B5/39 , G11B19/20 , G11B25/04
CPC分类号： F16C21/00 , B82Y10/00 , B82Y25/00 , F16C19/54 , F16C25/06 , F16C33/30 , F16C33/32 , G11B19/2009 , F16C19/06 , F16C2370/12 , G11B2005/3996 , G11B25/043
摘要： A rolling bearing having a plurality of rolling elements interposed between an inner race and an outer race, wherein the number of the rolling elements is selected to be equal to a number having, as divisors, main low-frequency peak components of geometrical error of the inner and outer races to be assembled.
摘要翻译：一种滚动轴承，其具有插入在内圈和外圈之间的多个滚动元件，其中滚动元件的数量被选择为等于具有作为因数的主要低频峰值分量的几何误差的数量内外赛要组装。

4. 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。

5. 发明授权

US5289067A Bearing device 失效
标题翻译：轴承装置
公开(公告)号：US5289067A
公开(公告)日：1994-02-22
申请号：US11980
申请日：1993-02-01
申请人： Katsuhiko Tanaka , Ikunori Sakatani , Takeyuki Yoshiba , Shigeru Endo
发明人： Katsuhiko Tanaka , Ikunori Sakatani , Takeyuki Yoshiba , Shigeru Endo
IPC分类号： F16C33/10 , F16C39/06 , H02K5/16 , H02K7/09
CPC分类号： F16C32/044 , F16C17/026 , F16C17/107 , F16C32/0402 , F16C33/107 , H02K5/1677 , H02K7/09
摘要： A bearing device comprising a fixed shaft having a first radial bearing surface, a sleeve provided in a fitting relationship with the fixed shaft and having a second radial bearing surface opposed to the first radial bearing surface, the second radial bearing surface having herring-bone grooves thereon to form a radial gas bearing to support the sleeve with respect to the fixed shaft, and the fixed shaft having one end portion forming part of a magnetic thrust bearing of aspirating type to support the sleeve with respect to the fixed shaft.
摘要翻译：一种轴承装置，包括具有第一径向支承表面的固定轴，与所述固定轴配合关系的套筒，并具有与所述第一径向支承表面相对的第二径向支承表面，所述第二径向支承表面具有鲱鱼骨槽形成用于相对于固定轴支撑套筒的径向气体轴承，并且固定轴具有一个端部，该端部构成吸气型磁力推力轴承的一部分，以相对于固定轴支撑套筒。

6. 发明授权

US4547081A Dynamic pressure type fluid bearing 失效
标题翻译：动压式流体轴承
公开(公告)号：US4547081A
公开(公告)日：1985-10-15
申请号：US611385
申请日：1984-05-17
申请人： Katsuhiko Tanaka , Ikunori Sakatani
发明人： Katsuhiko Tanaka , Ikunori Sakatani
IPC分类号： F16C17/10 , F16C17/08 , F16C33/10
CPC分类号： F16C33/106 , F16C17/026 , F16C17/08 , F16C33/107
摘要： A dynamic pressure type fluid bearing comprises a housing provided with a cylindrical hole having a cylindrically shaped inner bearing surface for radial load and a bottom bearing surface for thrust load, and a shaft disposed in the cylindrical hole and having a cylindrically shaped outer bearing surface for radial load opposed to and cooperative with the inner bearing surface and an end bearing surface for thrust load opposed to and cooperative with the bottom bearing surface. At least one of the inner bearing surface and the outer bearing surface is provided with grooves for generating a dynamic pressure. A communication hole is provided in the bottom bearing surface and opens to the outside of the housing. The bottom bearing surface has around the communication hole an annular contact bearing surface which contacts the end bearing surface when the bearing is stationary.
摘要翻译：动压式流体轴承包括：壳体，其具有圆柱形孔，该圆柱形孔具有用于径向载荷的圆柱形内轴承表面和用于推力载荷的底部承载面，以及设置在圆柱形孔中的轴，并具有圆柱形外部支承表面，与内轴承表面相对并与之配合的径向载荷以及与底部支承表面相对并与之协调的推力载荷的端部支承表面。内轴承表面和外支承表面中的至少一个设置有用于产生动压的凹槽。一个连通孔设置在底部支承表面中并且通向壳体的外部。底部承载表面在连通孔周围具有环形接触支承表面，当轴承静止时，其与端部支承表面接触。

7. 发明授权

US4934836A Dynamic pressure type fluid bearing device 失效
标题翻译：动压式流体轴承装置
公开(公告)号：US4934836A
公开(公告)日：1990-06-19
申请号：US393700
申请日：1989-08-14
申请人： Katsuhiko Tanaka , Ikunori Sakatani , Takeyuki Yoshiba , Takanobu Sato , Kiyoshi Haginuma , Toshimi Takajou , Hiromi Sugi
发明人： Katsuhiko Tanaka , Ikunori Sakatani , Takeyuki Yoshiba , Takanobu Sato , Kiyoshi Haginuma , Toshimi Takajou , Hiromi Sugi
IPC分类号： F16C17/10 , F16C33/10
CPC分类号： F16C33/107 , F16C17/026 , F16C17/107
摘要： A housing has a vertically extending cylindrical bore, with a radical bearing surface formed on the inner peripheral surface, and a thrust bearing surface formed on the inner bottom surface of the cylindrical bore. A shaft member which is supported rotatably in the cylindrical bore of the housing has a radial receiving surface and a thrust receiving surface respectively formed on the outer peripheral surface and the bottom surface. A dynamic pressure generating groove of a spiral shape is formed in at least one of the radial bearing surface and ther radial receiving surface. When the shaft member is rotated, a gas in the housing is sucked by the pumping action of the dynamic pressure generating groove and flows into a pressure chamber between the thrust bearing surface and the thrust receiving surface through a radial space between the radial bearing surface and the radial receiving surface. The pressure in the pressure chamber maintains the shaft member in a floating position by a predetermined amount. The shaft member has a passage bore formed along a center axis line. The passage bore includes a restricted aperture of a smaller diameter which opens at the thrust receiving surface of the shaft member to thereby allow the gas in the pressure chamber to be exhausted into the housing through the passage bore.
摘要翻译：壳体具有竖直延伸的圆柱形孔，内圆周表面上形成有自由基轴承表面，以及形成在圆柱孔内底表面上的止推轴承表面。可旋转地支撑在壳体的圆筒孔中的轴构件具有分别形成在外周表面和底表面上的径向接收表面和止推接收表面。在径向轴承表面和径向接收表面中的至少一个中形成螺旋形状的动态压力产生槽。当轴构件旋转时，壳体中的气体通过动压产生槽的泵送作用被吸入，并通过径向支承表面和径向轴承表面之间的径向空间流入推力轴承表面和推力承受表面之间的压力室中径向接收面。压力室中的压力将轴构件保持在浮动位置预定量。轴构件具有沿着中心轴线形成的通道孔。通道孔包括较小直径的限制孔径，其在轴构件的推力接收表面处开口，从而允许压力室中的气体通过通道孔排出到壳体中。

8. 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。

9. 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.

10. 发明授权

US4856918A Bearing device 失效
标题翻译：轴承装置
公开(公告)号：US4856918A
公开(公告)日：1989-08-15
申请号：US176038
申请日：1988-03-09
申请人： Gentei Inoue , Ikunori Sakatani , Katsuhiko Tanaka
发明人： Gentei Inoue , Ikunori Sakatani , Katsuhiko Tanaka
IPC分类号： F16C17/08 , F16C17/10 , F16C33/10
CPC分类号： F16C33/102 , F16C17/08 , F16C17/10 , F16C33/10
摘要： A bearing device of a rotary cylinder for a magnetic head includes a fixed shaft and a sleeve rotatably supported about the fixed shaft through a radial bearing. A thrust receiver secured to one axial end of the sleeve has a convex spherical surface at the side confronting the fixed shaft, and a concave spherical surface is formed on an end surface of the fixed shaft confronting the convex spherical surface. A radius of curvature of the concave spherical surface is larger than a radius of curvature of the convex spherical surface of the thrust receiver.
摘要翻译：用于磁头的旋转圆筒的轴承装置包括固定轴和通过径向轴承可旋转地支撑在固定轴上的套筒。固定在套筒的一个轴向端部的推力接收体在与固定轴相对的一侧具有凸形的球面，并且在面对凸球面的固定轴的端面上形成凹球面。凹球面的曲率半径大于推力接收器的凸球面的曲率半径。

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