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1. 发明授权

US06717310B2 Spindle motor and method for assembling the same 失效
标题翻译：主轴电机及其组装方法
公开(公告)号：US06717310B2
公开(公告)日：2004-04-06
申请号：US10152820
申请日：2002-05-23
申请人： Shoichi Yoshikawa , Takao Yoshitsugu , Norimasa Takata
发明人： Shoichi Yoshikawa , Takao Yoshitsugu , Norimasa Takata
IPC分类号： H02K708
CPC分类号： F16C43/02 , F16C17/107 , F16C17/26 , F16C33/107 , F16C2370/12 , G11B19/2018 , H02K5/1675
摘要： A downsized spindle motor having a longer bearing service life and enhanced shock resistance includes a flange 11, which bears an axial load of a shaft 8, and which is fixed to an end of shaft 8. Laser welded section 14 is provided at the fixed section between shaft 8 and flange 11. Rotor hub 50 is fixed to another end of shaft 8, and laser welded section 54 firmly bonds the two elements.
摘要翻译：具有较长的轴承使用寿命和增强的抗冲击性的小型主轴电动机包括承载轴8的轴向载荷并且固定到轴8的端部的凸缘11.激光焊接部分14设置在固定部分轴8与凸缘11之间。转子毂50固定在轴8的另一端，激光焊接部分54牢固地结合两个元件。

2. 发明授权

US06364532B1 Hydrodynamic bearing and motor having the same 有权
标题翻译：流体动力轴承和电机具有相同的功能
公开(公告)号：US06364532B1
公开(公告)日：2002-04-02
申请号：US09570529
申请日：2000-05-12
申请人： Shoichi Yoshikawa , Takao Yoshitsugu
发明人： Shoichi Yoshikawa , Takao Yoshitsugu
IPC分类号： F16C3206
CPC分类号： F16C33/107 , F16C17/107
摘要： A bearing comprises a rotating shaft, a sleeve which surrounds the outer wall of the rotating shaft and supports the rotating shaft in such a manner that the rotating shaft is rotatable, and a thrust bearing plate which is fixed to the sleeve and supports one end of the rotating shaft. A first herringbone pattern and a second herringbone pattern are formed either on the rotating shaft or on the sleeve, wherein the first herringbone pattern is located at a first side and the second herringbone pattern is located at a second side, wherein the first side is the side where the thrust bearing plate is located, and the second side is the side opposite the first side. The relation between width-A and width-B in the first herringbone pattern is expressed by 0
摘要翻译：轴承包括旋转轴，围绕旋转轴的外壁并且以使得旋转轴可旋转的方式支撑旋转轴的套筒，以及止推轴承板，该推力轴承板固定到套筒并支撑旋转轴。第一人字形图案和第二人字形图案形成在旋转轴上或套筒上，其中第一人字形图案位于第一侧，第二人字形图案位于第二侧，其中第一侧是一侧，其中推力轴承板所在的一侧，第二侧是与第一侧相对的一侧。第一人字形图案中的宽度A和宽度B之间的关系用0 <（AB）<0.2×（A + B）表示，其中A表示从第一人字形图案的转折点到其末端的尺寸在第一侧，B表示从第二侧的转折点到其端部的尺寸，第二人字形图案中的宽度C与宽度-D之间的关系用0表示（（D（C）（0.2（（D + C））其中，C表示从第二人字形图案的转折点到第一人字形图案的端部的尺寸，D表示从第二侧的转折点到其端部的尺寸。上述结构能够减小轴承的旋转轴的径向跳动并提高轴承的耐久性。

3. 发明授权

US06787954B2 Spindle motor 有权
标题翻译：主轴电机
公开(公告)号：US06787954B2
公开(公告)日：2004-09-07
申请号：US10144038
申请日：2002-05-14
申请人： Takao Yoshitsugu , Shoichi Yoshikawa
发明人： Takao Yoshitsugu , Shoichi Yoshikawa
IPC分类号： H02K5167
CPC分类号： F16C17/10 , F16C17/026 , F16C33/107 , F16C43/02 , F16C2370/12 , H02K5/1675 , H02K15/14
摘要： A downsized spindle motor of excellent abrasion and shock resistance is provided. A shaft is fit into a sleeve. A flange is fixed to an end of the shaft. A radial bearing is formed on faces of the shaft and the sleeve, which faces are opposite and close to each other. A face of the flange closely faces a face of a thrust plate, thereby forming a thrust bearing. Another face of the thrust plate is caulked with a tip of the sleeve. The tip of the sleeve and the thrust plate are fixed to each other by an adhesive. A tapering section is provided at an upper end of the sleeve.
摘要翻译：提供了具有优异耐磨和抗冲击性的小型主轴电动机。轴装入套筒中。法兰固定在轴的一端。径向轴承形成在轴和套筒的面上，其面向相对并彼此靠近。凸缘的表面紧紧地朝向推力板的表面，从而形成推力轴承。推力板的另一面用套筒的尖端填塞。套筒的尖端和推力板通过粘合剂彼此固定。锥形部分设置在套筒的上端。

4. 发明授权

US06188152B1 Motor and hard disk drive having a reduced vibration motor 有权
标题翻译：电机和硬盘驱动器具有减少振动的电机
公开(公告)号：US06188152B1
公开(公告)日：2001-02-13
申请号：US09272579
申请日：1999-03-19
申请人： Akihiko Wakitani , Takao Yoshitsugu , Shoichi Yoshikawa , Akihide Matsuo , Hideshi Fukutani
发明人： Akihiko Wakitani , Takao Yoshitsugu , Shoichi Yoshikawa , Akihide Matsuo , Hideshi Fukutani
IPC分类号： H02K524
CPC分类号： H02K7/085 , G11B19/2009 , H02K7/086
摘要： It is an object of the present invention to provide a motor capable of reducing a loss as much as possible, and securing minimum vibration proof performance and reliability by definitely defining the upper and lower limits of a minimum shaft diameter in conformity with a disk load, the service number of revolutions or the like. In a shaft-fixed type motor of the fluid bearing specifications, the diameter d (mm) of a fixed shaft is set so as to satisfy the relation of &agr;3·M1 >d3>M1, where M1=J1·(N/1000)2·k2·D, J1 being a coefficient to be experimentally determined, N(rpm) the service number of revolutions, k the number of a disk-shaped recording media, D (inch) the diameter of the disk-shaped recording medium, and &agr; a ratio of the maximum diameter to the minimum diameter of the fixed shaft.
摘要翻译：本发明的目的是提供一种能够尽可能减少损耗并且通过明确地限定符合盘载荷的最小轴直径的上限和下限来确保最小的防振性能和可靠性的电动机，服务次数等。在流体轴承规格的轴固定式电动机中，固定轴的直径d（mm）设定为满足α3·M1> d3> M1的关系，其中M1 = J1（N / 1000） 2.k2.D，J1是实验确定的系数，N（rpm）服务转数，k是盘形记录介质的数量，D（英寸）盘形记录介质的直径，和α是固定轴的最大直径与最小直径的比。

5. 发明申请

US20100085661A1 HYDRODYNAMIC BEARING DEVICE AND DISK ROTATION APPARATUS 失效
标题翻译：水力轴承装置和盘旋转装置
公开(公告)号：US20100085661A1
公开(公告)日：2010-04-08
申请号：US12412870
申请日：2009-03-27
申请人： Takafumi ASADA , Hiroaki Saito , Takao Yoshitsugu , Keigo Kusaka , Hiroyuki Kiriyama , Daisuke Ito
发明人： Takafumi ASADA , Hiroaki Saito , Takao Yoshitsugu , Keigo Kusaka , Hiroyuki Kiriyama , Daisuke Ito
IPC分类号： G11B17/02 , F16C32/06
CPC分类号： F16C17/107 , F16C33/103 , F16C33/107 , F16C2370/12
摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.
摘要翻译：在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

6. 发明申请

US20070090716A1 Spindle motor, and recording and reproducing apparatus equipped with the same 失效
标题翻译：主轴电动机，以及配备有其的记录和再现装置
公开(公告)号：US20070090716A1
公开(公告)日：2007-04-26
申请号：US11524247
申请日：2006-09-21
申请人： Yoichi Oki , Masahiro Jyono , Takao Yoshitsugu
发明人： Yoichi Oki , Masahiro Jyono , Takao Yoshitsugu
IPC分类号： G11B17/02 , H02K1/00 , H02K1/12
CPC分类号： H02K1/148 , G11B19/2009
摘要： With a spindle motor 20, a stator core 8 comprises a plurality of salient pole components 51 that are formed in a radial shape, are wound with a stator coil 9, and are disposed at a uniform angle except for a non-equiangular pitch portion, an circular outer peripheral yoke 52 formed so as to be continuous with the outer peripheral side of the salient pole components 51, a cut-out 55 which is formed by cutting out part of the outer peripheral yoke 52 in an approximate sector-shape except in the non-equiangular pitch portion of the salient pole components 51, and a compensating pole plate 11 which is provided in the cut-out 55 along the ends on the inner peripheral side of the non-equiangular pitch portion where the salient pole components 51 are formed.
摘要翻译：在主轴电动机20中，定子铁芯8包括形成为径向形状的多个凸极部件51，卷绕有定子线圈9，并且除非非等距节距部分以均匀的角度配置，形成为与突极部件51的外周侧连续的圆形外周磁轭52，切除部55，其通过将外周磁轭52的一部分切除成大致扇形，除了突极部件51的非等角度节距部分和沿非极性节距部分的内周侧的端部设置在切口55中的补偿极板11，其中凸极部件51是形成。

7. 发明申请

US20070024136A1 Hydrodynamic bearing device, motor, and disk driving apparatus 失效
标题翻译：流体动力轴承装置，电动机和盘驱动装置
公开(公告)号：US20070024136A1
公开(公告)日：2007-02-01
申请号：US11443175
申请日：2006-05-31
申请人： Hiroaki Saito , Hiroyuki Kiriyama , Takao Yoshitsugu , Koji Hirata
发明人： Hiroaki Saito , Hiroyuki Kiriyama , Takao Yoshitsugu , Koji Hirata
IPC分类号： H02K5/16 , F16C32/06
CPC分类号： F16C17/102 , F16C17/107 , F16C33/107 , H02K7/086
摘要： To provide a hydrodynamic bearing device with high reliability, with which reductions in size, weight, and thickness can be achieved, as well as a motor and a disk driving apparatus that make use of this hydrodynamic bearing device. The hydrodynamic bearing device pertaining to the present invention comprises a shaft 10, a thrust flange 16, a sleeve 11, a seal plate 21, and a retaining plate 20. A radial dynamic pressure bearing is formed in the radial direction gap between the shaft 10 and the sleeve 11, and a thrust dynamic pressure bearing is formed in the thrust dynamic bearing gap between the sleeve 11 and the thrust flange 16. A communicating hole 11d is formed for communicating between the gap between the sleeve 11 and the seal plate 21 and the thrust direction gap between the sleeve 11 and the thrust flange 116. The radial dynamic pressure bearing and/or the thrust dynamic pressure bearing are formed such that a lubricating oil 9 circulates in the gap between the sleeve 11 and the seal plate 21 from the inner peripheral side of the sleeve 11 toward the outer peripheral side.
摘要翻译：提供具有高可靠性的流体动力轴承装置，其可以实现尺寸，重量和厚度的减小，以及利用该流体动力轴承装置的电动机和盘驱动装置。本发明的流体动力轴承装置包括轴10，推力凸缘16，套筒11，密封板21和保持板20。径向动压轴承形成在轴10和套筒11之间的径向间隙中，并且推力动压轴承形成在套筒11和推力凸缘16之间的推力动态轴承间隙中。形成连通孔11d用于在套筒11和密封板21之间的间隙以及套筒11和推力凸缘116之间的推力方向间隙之间连通。径向动压轴承和/或推力动压轴承形成为使得润滑油9从套筒11的内周侧向外周侧在套筒11和密封板21之间的间隙中循环。

8. 发明申请

US20060255675A1 Hydrodynamic bearing device and spindle motor having the bearing device, and recording and/or reproducing apparatus using the spindle motor 失效
公开(公告)号：US20060255675A1
公开(公告)日：2006-11-16
申请号：US11407060
申请日：2006-04-20
申请人： Hiroaki Saito , Takeyoshi Yamamoto , Takao Yoshitsugu
发明人： Hiroaki Saito , Takeyoshi Yamamoto , Takao Yoshitsugu
IPC分类号： H02K5/16 , H02K7/08
CPC分类号： F16C33/107 , F16C17/107 , H02K5/1675 , H02K7/085
摘要： A set of radial dynamic pressure generating grooves constitute a radial bearing, and an entire width (L) of the radial dynamic pressure generating groove is reduced. A set of thrust dynamic pressure generating grooves constituting a thrust bearing are formed so that an area where a maximal thrust dynamic pressure is generated (diameter) is increased, and a bearing angle stiffness of the thrust bearing is increased. The thrust bearing having the high bearing angle stiffness shares a moment load applied to a shaft to thereby compensate for a bearing angle stiffness of the radial bearing whose bearing stiffness is small because an entire width of the radial bearing is small. Thus, a thin-shaped hydrodynamic bearing capable of withstanding a large moment load is obtained.

9. 发明授权

US07898129B2 Spindle motor, and recording and reproducing apparatus equipped with the same 失效
标题翻译：主轴电动机，以及配备有其的记录和再现装置
公开(公告)号：US07898129B2
公开(公告)日：2011-03-01
申请号：US12421863
申请日：2009-04-10
申请人： Yoichi Oki , Masahiro Jyono , Takao Yoshitsugu
发明人： Yoichi Oki , Masahiro Jyono , Takao Yoshitsugu
IPC分类号： H02K1/14 , H02K1/16 , G11B19/20 , G11B23/03
CPC分类号： H02K1/148 , G11B19/2009
摘要： With a spindle motor, a stator core comprises a plurality of salient pole portions that are formed in a radial shape, are wound with a stator coil, and are disposed at a uniform angle except for a non-equiangular pitch region, a circular outer peripheral yoke formed so as to be continuous with the outer peripheral side of the salient pole portions, a cut-out which is formed by cutting out part of the outer peripheral yoke in an approximate sector-shape except in the non-equiangular pitch region of the salient pole portions, and a compensating pole plate which is provided in the cut-out along the ends on the inner peripheral side of the non-equiangular pitch region where the salient pole portions are formed.
摘要翻译：在主轴电动机中，定子铁芯包括形成为径向形状的多个凸极部分，用定子线圈缠绕，并且除了非等角度间距区域之外以均匀的角度设置，圆形外周形成为与凸极部的外周侧连续的磁轭，切除部，其除了在外侧磁轭的非等角度的间距区域外以大致的扇形形状切出外周磁轭的一部分而形成凸极部分和沿着形成有突极部分的非等角度间距区域的内周侧的端部设置在切口中的补偿极板。

10. 发明申请

US20080112306A1 HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：水力轴承装置，主轴电机，记录和再生装置
公开(公告)号：US20080112306A1
公开(公告)日：2008-05-15
申请号：US11940036
申请日：2007-11-14
申请人： Koji HIRATA , Hiroaki Saito , Takao Yoshitsugu , Hiroyuki Kiriyama
发明人： Koji HIRATA , Hiroaki Saito , Takao Yoshitsugu , Hiroyuki Kiriyama
IPC分类号： G11B21/02 , F16C27/00 , H02K7/08
CPC分类号： F16C17/107 , F16C33/107 , F16C33/74 , F16C2370/12 , G11B21/16
摘要： In order to prevent oil leakage in a hydrodynamic bearing device comprising an opening section in close proximity to a radial bearing and a lubricating fluid reservoir, a shaft 10, thrust flange 16, sleeve 11, seal plate 21, and stopper plate 20 are provided, a radial dynamic pressure bearing is formed in a radial clearance between the shaft 10 and sleeve 11, and a thrust dynamic pressure bearing is formed in a thrust direction clearance between the sleeve 11 and thrust flange 16. A connecting hole 11d is formed that connects a gap between the sleeve 11 and seal plate 21 and a thrust direction gap between the sleeve 11 and thrust flange 16. The relationship A
摘要翻译：为了防止在包括靠近径向轴承和润滑流体储存器的开口部分的流体动力轴承装置中的油泄漏，提供轴10，推力凸缘16，套筒11，密封板21和止动板20，径向动压轴承形成在轴10和套筒11之间的径向间隙中，并且推力动压轴承形成在套筒11和推力凸缘16之间的推力方向间隙。形成连接孔11d，其连接套筒11和密封板21之间的间隙以及套筒11和推力凸缘16之间的推力方向间隙。满足关系A

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