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11. 发明授权

US07321178B2 Spindle motor 有权
公开(公告)号：US07321178B2
公开(公告)日：2008-01-22
申请号：US11293078
申请日：2005-12-05
申请人： Akihiko Wakitani , Masahiro Jyono , Takao Yoshitsugu , Yoshihiro Ashizaki
发明人： Akihiko Wakitani , Masahiro Jyono , Takao Yoshitsugu , Yoshihiro Ashizaki
IPC分类号： H02K1/00
CPC分类号： H02K1/146 , H02K21/16 , H02K21/24
摘要： In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.

12. 发明申请

US20060029312A1 Hydrodynamic bearing device, motor and disc driving apparatus 审中-公开
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：US20060029312A1
公开(公告)日：2006-02-09
申请号：US11194551
申请日：2005-08-02
申请人： Hiroyuki Kiriyama , Takao Yoshitsugu , Takafumi Asada , Hiroaki Saito
发明人： Hiroyuki Kiriyama , Takao Yoshitsugu , Takafumi Asada , Hiroaki Saito
IPC分类号： F16C32/06
CPC分类号： F16C33/103 , F16C2370/12 , H02K5/1677
摘要： An object of the present invention is to provide a hydrodynamic bearing device having a high reliability which can achieve miniaturization and reduction of weight and thickness, and a motor and a disc driving apparatus using the same. In the hydrodynamic bearing device according to the present invention, a sleeve through which a shaft penetrates has a first opposing surface substantially orthogonal to a central axis of the shaft at one end and has a second opposing surface at the other end. A thrust plate having a disc shape which is fixed near one end of the shaft or which is integrally formed with the shaft is positioned so as to oppose the first opposing surface of the sleeve. A seal plate positioned near the other end of the shaft is positioned with a gap to the second opposing surface of the sleeve.
摘要翻译：本发明的目的是提供一种具有高可靠性的流体动力轴承装置，其可以实现重量和厚度的小型化和减小，以及使用其的电动机和盘驱动装置。在根据本发明的流体动力轴承装置中，轴穿过的套筒具有在一端处基本上垂直于轴的中心轴线的第一相对表面，并且在另一端具有第二相对表面。具有固定在轴的一端附近或与轴一体形成的圆盘形状的止推板被定位成与套筒的第一相对表面相对。位于轴的另一端附近的密封板定位成与套筒的第二相对表面具有间隙。

13. 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。

14. 发明授权

US06357916B2 Hydrodynamic bearing device 失效
标题翻译：流体动力轴承装置
公开(公告)号：US06357916B2
公开(公告)日：2002-03-19
申请号：US09245308
申请日：1999-02-05
申请人： Yasuo Saeki , Takao Yoshitsugu , Katsunori Sakuragi , Hideshi Fukutani
发明人： Yasuo Saeki , Takao Yoshitsugu , Katsunori Sakuragi , Hideshi Fukutani
IPC分类号： H02K516
CPC分类号： F16C17/107 , F16C17/045 , F16C33/107 , F16C33/74 , F16C2370/12
摘要： A hydrodynamic bearing which prevents a lubricating fluid from scattering out of the dynamic pressure generating portion. The bearing includes radial spacing d of a gap at an open end of the thrust-side dynamic pressure generating portion, whose value is greater than a spacing of the thrust-side dynamic pressure generating portion, as measured relative to the thrust direction. Scattering of lubricating fluid from the open end of the thrust-side dynamic pressure generating portion is therefore prevented even when the bearing rotates at a high speed in a high temperature envivronent.
摘要翻译：一种防止润滑流体从动压产生部分飞出的流体动力轴承。轴承包括推力侧动压产生部分的开口端处的间隙的径向间隔d，其值大于推力侧动压产生部分的相对于推力方向测量的间隔。因此，即使轴承在高温环境下高速旋转，也能够防止润滑液从推力侧动压产生部的开口端的散射。

15. 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。

16. 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

17. 发明授权

US06467963B2 Fluid bearing equipment 失效
标题翻译：流体轴承设备
公开(公告)号：US06467963B2
公开(公告)日：2002-10-22
申请号：US09244038
申请日：1999-02-04
申请人： Katsunori Sakuragi , Takao Yoshitsugu , Yasuo Saeki , Hideshi Fukutani
发明人： Katsunori Sakuragi , Takao Yoshitsugu , Yasuo Saeki , Hideshi Fukutani
IPC分类号： H02K516
CPC分类号： F16C33/107 , F16C17/045 , F16C17/107 , F16C2370/12 , G11B5/53 , G11B19/2009 , H02K7/086
摘要： Fluid bearing equipment which is free from lockup or seizure which may occur due to a deficiency of a lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment. The fluid bearing equipment is arranged such that maximum pressure generating portions 23 of dynamic pressure generating grooves 15, 16 provided in a thrust-side dynamic pressure generating portion are located closer to the outer circumference of a stationary thrust plate 9 than a radially middle position of the thrust-side dynamic pressure generating portion. With this arrangement, the lockup and seizure of a motor can be prevented which may otherwise occur due to a deficiency of the lubricating fluid when the equipment is operated at a high rotation speed in a high temperature environment.
摘要翻译：流体轴承设备，当设备在高温环境下以高转速运行时，不会由于润滑流体不足而发生锁定或卡住。流体轴承设备被布置成使得设置在推力侧动压发生部分中的动压发生槽15,16的最大压力产生部23位于比固定推力板9的外周更靠近固定推力板9的外周的位置推力侧动压产生部。通过这种布置，可以防止当设备在高温环境中以高转速运行时由于润滑流体的不足而可能发生马达的锁定和卡住。

18. 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。

19. 发明授权

US5708520A Rotating polygon mirror driving apparatus 失效
公开(公告)号：US5708520A
公开(公告)日：1998-01-13
申请号：US661644
申请日：1996-06-11
申请人： Takao Yoshitsugu , Koichiro Ohata , Tsuyoshi Kano
发明人： Takao Yoshitsugu , Koichiro Ohata , Tsuyoshi Kano
IPC分类号： G02B26/12 , G02B26/08
CPC分类号： G02B26/121
摘要： A rotating polygon mirror driving apparatus has a rotor having a rotating polygon mirror fixed thereto, a rotational shaft and a rotor magnet; a bracket having a base plate provided opposite to the rotor magnet and a collar forming a bearing holding portion of a resin outserted to the base plate and made; and a bearing fitted to the bracket so as to support the rotational shaft. The driving apparatus can be decreased in cost and thickness while maintaining excellent rotational precision and mechanical precision.

20. 发明授权

US07830637B2 Hydrodynamic bearing device and disk rotation apparatus 失效
标题翻译：流体动力轴承装置和盘旋转装置
公开(公告)号：US07830637B2
公开(公告)日：2010-11-09
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
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。

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