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1. 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。

2. 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。

3. 发明授权

US6123460A Hydrodynamic gas bearing structure and optical deflection scanner comprising the same 有权
标题翻译：流体动力气体轴承结构和包括其的光学偏转扫描仪
公开(公告)号：US6123460A
公开(公告)日：2000-09-26
申请号：US171999
申请日：1998-10-28
申请人： Hisao Takeuchi , Kaoru Murabe , Osamu Komura , Tomoyuki Awazu
发明人： Hisao Takeuchi , Kaoru Murabe , Osamu Komura , Tomoyuki Awazu
IPC分类号： F16C15/00 , F16C33/04 , F16C33/10 , F16C33/14 , G02B26/12 , F16C32/06
CPC分类号： G02B26/121 , F16C17/028 , F16C17/18 , F16C33/043 , F16C33/1075 , F16C33/14 , F16C3/02
摘要： A hydrodynamic gas bearing structure can prevent the occurrence of whirl not only in high-speed rotation but also in low-speed rotation, and is capable of suppressing dispersion of a floating rotational frequency. The hydrodynamic gas bearing structure includes a shaft body (1) and a bearing body (2). A groove (11) is formed on the outer peripheral surface of the shaft body (1). The groove (11) consists of at least two concave parts, of which the depths substantially differ from each other, which are formed serially in the circumferential direction, and which each have a circumferentially asymmetrical shape in a cross section perpendicular to the axis. A circumferential distance a is defined between the intersection point (15) of the outer circular peripheral line (Q) of the shaft body and a line (C) connecting the deepest point (14) of the groove (11) with the center (O) of the shaft body (1), and one edge (16) of the groove (11) positioned downstream with respect to an air current (P) generated during rotation in relation to the intersection point (15). This circumferential distance a is larger than the circumferential distance b between the intersection point (15) and the other edge (17) of the groove (11) positioned upstream with respect to the air current (P) in relation to the intersection point (15). The hydrodynamic gas bearing structure is employed for a rotation driving part of an optical deflection scanner.
摘要翻译： PCT No.PCT / JP98 / 00740 Sec。 371 1998年10月28日第 102（e）1998年10月28日PCT PCT日期：1998年2月23日PCT公布。第WO98 / 38434号公报日期1998年9月3日流体动力气体轴承结构不仅可以防止在高速旋转中而且在低速旋转中产生旋转，并且能够抑制浮动旋转频率的分散。流体动力气体轴承结构包括轴体（1）和轴承体（2）。在轴体（1）的外周面形成有槽（11）。凹槽（11）由至少两个凹部构成，其深度基本上彼此不同，它们在圆周方向上串联形成，并且在与轴线垂直的横截面中各具有周向不对称的形状。圆周距离a限定在轴体的外圆周线（Q）的交点（15）与将槽（11）的最深点（14）与中心（O）连接的线（C）之间）和相对于相对于交点（15）旋转期间产生的气流（P））位于下游的凹槽（11）的一个边缘（16）。该圆周距离a大于相对于交点（15）位于相对于气流（P）的上游的槽（11）的交点（15）和另一边缘（17）之间的圆周距离b ）。流体动力气体轴承结构用于光学偏转扫描器的旋转驱动部分。

4. 发明授权

US5835124A Dynamic-pressure gas bearing structure and optical deflection scanning apparatus 失效
标题翻译：动压气体轴承结构和光学偏转扫描仪
公开(公告)号：US5835124A
公开(公告)日：1998-11-10
申请号：US716093
申请日：1996-09-19
申请人： Taku Fukita , Mikio Nakasugi , Isshin Sato , Tetsuya Katayama , Osamu Komura , Kaoru Murabe
发明人： Taku Fukita , Mikio Nakasugi , Isshin Sato , Tetsuya Katayama , Osamu Komura , Kaoru Murabe
IPC分类号： B41J2/44 , F16C17/02 , F16C33/10 , F16C33/24 , F16C39/06 , G02B26/12 , G01D11/02
CPC分类号： F16C33/107 , F16C17/026 , F16C39/063 , G02B26/121
摘要： A dynamic-pressure gas bearing structure includes a sleeve, a column-like shaft fitted to the sleeve, and a plurality of shallow grooves formed on the outer peripheral surface of the shaft and extending in the axial direction of the shaft. The shallow grooves are formed by grinding in which grains are aligned to the aforementioned axial direction. An optical deflection scanning apparatus is provided with such dynamic-pressure gas bearing structure.
摘要翻译：动压气体轴承结构包括套筒，与套筒配合的柱状轴以及形成在轴的外周面上并在轴的轴向延伸的多个浅槽。通过研磨形成浅槽，其中颗粒与上述轴向对准。光学偏转扫描装置具有这种动压气体轴承结构。

5. 发明授权

US5776600A Slide member and method of manufacturing the same 失效
标题翻译：滑动构件及其制造方法
公开(公告)号：US5776600A
公开(公告)日：1998-07-07
申请号：US631666
申请日：1996-04-09
申请人： Tetsuya Katayama , Kaoru Murabe , Osamu Komura , Chihiro Kawai , Akira Yamakawa , Kenji Matsunuma , Norio Yasuoka , Matsuo Higuchi , Masaya Miyake
发明人： Tetsuya Katayama , Kaoru Murabe , Osamu Komura , Chihiro Kawai , Akira Yamakawa , Kenji Matsunuma , Norio Yasuoka , Matsuo Higuchi , Masaya Miyake
IPC分类号： C04B35/01 , C04B35/584 , C04B35/593 , C04B41/00 , C04B41/80 , F16C33/04 , F16C33/16 , C04B35/587
CPC分类号： C04B41/009 , C04B35/01 , C04B35/584 , C04B35/593 , C04B35/5935 , C04B41/0072 , C04B41/80 , F16C33/043 , F16C33/16 , C04B2111/00353 , Y10T428/252 , Y10T428/2991 , Y10T428/30
摘要： A slide member has a sliding surface made of ceramic and a has surface roughness of not more than 1.0 .mu.m in center line average roughness Ra. The ceramics includes a silicon nitride sintered body which contains crystal grains having a linear density of at least 35 per 30 .mu.m in length with a boundary phase volume ratio of not more than 15 volume %, and which contains pores of not more than 20 .mu.m in maximum diameter in a content of not more than 3%. In a method of manufacturing the slide member, it is possible to ensure smoothness of the sliding surface by grinding the sliding surface and thereafter heating the ceramic in an either an inert gas or atmospheric air. A slide member that can be used under severe sliding conditions of high-speed sliding or the like and that has excellent wear resistance is obtained. Even if the slide member is used for to a sliding part of a compressor or the like which employs a fluorocarbon containing no chlorine as a cooling medium, it is possible to prevent the occurrence of seizure and abnormal wear on the sliding surface.
摘要翻译：滑动构件具有由陶瓷制成的滑动面，并且在中心线平均粗糙度Ra中具有不大于1.0μm的表面粗糙度。陶瓷包括氮化硅烧结体，其包含长度为30μm以上的线密度为35以上，边界相体积比为15体积％以下且含有不大于20μm的孔的晶粒 m最大直径，含量不超过3％。在制造滑动构件的方法中，可以通过研磨滑动表面并随后在惰性气体或大气中加热陶瓷来确保滑动表面的平滑度。可以获得可以在高速滑动等的严酷滑动条件下使用且具有优异的耐磨性的滑动构件。即使将滑动部件用于使用不含氯的氟碳化合物的压缩机等的滑动部作为冷却介质，也可以防止滑动面发生卡滞和异常磨损。

6. 发明授权

US5599493A Method of producing silicon nitride ceramic component 失效
标题翻译：氮化硅陶瓷部件的制造方法
公开(公告)号：US5599493A
公开(公告)日：1997-02-04
申请号：US429067
申请日：1995-04-26
申请人： Yasushi Ito , Takehisa Yamamoto , Takao Nishioka , Akira Yamakawa , Osamu Komura
发明人： Yasushi Ito , Takehisa Yamamoto , Takao Nishioka , Akira Yamakawa , Osamu Komura
IPC分类号： C04B41/80 , B24B1/00 , C04B35/584 , C04B35/593 , C04B35/599 , C04B35/63 , C04B41/00 , B29C71/02
CPC分类号： C04B41/009 , C04B35/5935 , C04B41/00
摘要： A method of producing a silicon nitride ceramic component, comprising: grinding a silicon nitride sintered body comprising .alpha.--Si.sub.3 N.sub.4 having an average grain size of 0.5 .mu.m or smaller and .beta.'-sialon having an average grain size of 3 .mu.m or smaller in major axis and 1 .mu.m or smaller in minor axis into a predetermined size with a surface roughness of 1-7 .mu.m in ten-point mean roughness; heat treating the same at temperature range of 800.degree.-1200.degree. C. in the air; and standing it to allow to be cooled, whereby providing a residual stress in the ground surface before and after the heat treating as a residual compressive stress at a ratio of 1 or higher of the residual compressive stress after the heat treating to that before the heat treating (residual compressive stress after the heat treating/residual compressive stress before the heat treating), preferably 5 or more.
摘要翻译：一种氮化硅陶瓷成分的制造方法，其特征在于，包括：研磨包含平均粒径为0.5μm以下的α-Si 3 N 4，平均粒径为3μm以下的β'赛隆的氮化硅烧结体长轴和1μm或更小的短轴成预定尺寸，十点平均粗糙度的表面粗糙度为1-7μm; 在空气中在800〜1200℃的温度范围进行热处理; 并将其放置以允许冷却，由此在热处理之前和之后的地面中提供作为残余压应力的残余应力在热处理后的剩余压缩应力为1或更高的比例处理（热处理后的残余压应力/热处理前的残余压应力）优选为5以上。

7. 发明授权

US4753764A Manufacturing method for fiber reinforced silicon ceramics sintered body 失效
标题翻译：纤维增强硅陶瓷烧结体的制造方法
公开(公告)号：US4753764A
公开(公告)日：1988-06-28
申请号：US534143
申请日：1983-09-21
申请人： Eiji Kamijo , Matsuo Higuchi , Osamu Komura
发明人： Eiji Kamijo , Matsuo Higuchi , Osamu Komura
IPC分类号： C04B35/565 , C04B35/584 , C04B35/80 , F02B3/06 , C04B35/56 , C04B35/58
CPC分类号： C04B35/584 , C04B35/565 , C04B35/806 , F02B3/06
摘要： A method for manufacturing a fiber reinforced silicon carbide or silicon nitride ceramic sintered body having silicon carbide or silicon nitride ceramic whiskers dispersed therein, which method involves mixing together silicon carbide or silicon nitride ceramic powder, whisker formation agents made up of at least one material selected from metal Si or an inorganic compound containing Si, an organic containing Si, amorphous silicon ceramic powder or a mixture of SiO.sub.2 and carbon, or Si, sintering additives, and a whisker accelerating amount of a whisker formation accelerator selected from Fe, Ni, Co, Cr, V, Ti, Ta, W or Mo; molding the mixture into a predetermined shape; heat treating the molded body at a temperature of 1300.degree. C. to 1750.degree. C. to produce silicon carbide or silicon nitride whiskers in the molded body and thereafter densifying and sintering the molded body at sintering temperatures in a non-oxidizing atmosphere. The silicon carbide and silicon nitride ceramics produced by said method have excellent heat-resistance characteristics and excellent impact and corrosion resistance, thus making these ceramics eminently suitable for structural materials where these properties are required.
摘要翻译：一种制造分散有碳化硅或氮化硅陶瓷晶须的纤维增强碳化硅或氮化硅陶瓷烧结体的方法，该方法包括将碳化硅或氮化硅陶瓷粉末混合在一起，将至少一种材料制成的晶须形成剂来自金属Si或含Si的无机化合物，含有有机物的Si，非晶硅陶瓷粉末或SiO 2与碳的混合物，Si，烧结助剂和晶须加速量的选自Fe，Ni，Co的晶须形成促进剂，Cr，V，Ti，Ta，W或Mo; 将混合物成型为预定的形状; 在1300℃至1750℃的温度下对成型体进行热处理，以在成型体中制造碳化硅或氮化硅晶须，然后在非氧化性气氛中的烧结温度下使成型体致密化并烧结。通过该方法制造的碳化硅和氮化硅陶瓷具有优异的耐热特性和优异的耐冲击和耐腐蚀性，因此这些陶瓷特别适用于需要这些性能的结构材料。

8. 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.

9. 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。

10. 发明授权

US06608415B2 Spindle motor 有权
公开(公告)号：US06608415B2
公开(公告)日：2003-08-19
申请号：US10164631
申请日：2002-06-10
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.

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