公开(公告)号：US07473034B2

公开(公告)日：2009-01-06

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： F16C32/06

CPC分类号： F16C17/102 ,  F16C17/107 ,  F16C33/107 ,  H02K7/086

摘要： 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 comprises a shaft, a thrust flange, a sleeve, a seal plate, and a retaining plate. A radial dynamic pressure bearing is formed in the radial direction gap between the shaft and the sleeve, and a thrust dynamic pressure bearing is formed in the thrust dynamic bearing gap between the sleeve and the thrust flange. A communicating hole is formed for communicating between the gap between the sleeve and the seal plate and the thrust direction gap between the sleeve and the thrust flange. The radial dynamic pressure bearing and/or the thrust dynamic pressure bearing are formed such that a lubricating oil circulates in the gap between the sleeve and the seal plate from the inner peripheral side of the sleeve toward the outer peripheral side.

摘要翻译： 可以实现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。 流体动力轴承装置包括轴，推力凸缘，套筒，密封板和保持板。 径向动压轴承形成在轴与套筒之间的径向间隙中，推力动压轴承形成在套筒与推力凸缘之间的推力动态轴承间隙中。 形成连通孔，用于在套筒和密封板之间的间隙以及套筒和推力凸缘之间的推力方向间隙连通。 径向动压轴承和/或推力动压轴承形成为使得润滑油在套筒和密封板之间的间隙中从套筒的内周侧向外周侧循环。

公开(公告)号：US08013487B2

公开(公告)日：2011-09-06

申请号：US12552632

申请日：2009-09-02

申请人： Koji Hirata ,  Keigo Kusaka ,  Takao Yoshitsugu ,  Yoshihito Watanabe ,  Hisaaki Yano

发明人： Koji Hirata ,  Keigo Kusaka ,  Takao Yoshitsugu ,  Yoshihito Watanabe ,  Hisaaki Yano

IPC分类号： H02K5/167 ,  F16C32/06

CPC分类号： F16C33/723 ,  F16C17/026 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12

摘要： With a hydrodynamic bearing device 10, a first gap G1 is formed between a shaft 12 and a sleeve 11. A second gap G2 is formed between a sleeve cap 16 and the sleeve 11, and holds a lubricant 17. A thrust bearing member 21 is disposed near the inner peripheral surface of a center hole 16a of the sleeve cap 16. A third gap G3 is formed between the thrust bearing member 21 and the sleeve cap 16, and is open to the atmosphere. A fourth gap G4 is formed between the thrust bearing member 21 and the sleeve 11. The lubricant 17 circulates along a circulation passage that includes a communicating path 11b, the first gap G1 and the second gap G2.

摘要翻译： 利用流体动力轴承装置10，在轴12和套筒11之间形成第一间隙G1。在套筒盖16和套筒11之间形成第二间隙G2，并且保持润滑剂17.止推轴承部件21是 设置在套筒盖16的中心孔16a的内周面附近。第三间隙G3形成在推力轴承构件21和套筒盖16之间，并且向大气开放。 第四间隙G4形成在推力轴承部件21和套筒11之间。润滑剂17沿着包括连通路径11b，第一间隙G1和第二间隙G2的循环通道循环。

公开(公告)号：US20100079022A1

公开(公告)日：2010-04-01

申请号：US12552632

申请日：2009-09-02

申请人： Koji HIRATA ,  Keigo Kusaka ,  Takao Yoshitsugu ,  Yoshihito Watanabe ,  Hisaaki Yano

发明人： Koji HIRATA ,  Keigo Kusaka ,  Takao Yoshitsugu ,  Yoshihito Watanabe ,  Hisaaki Yano

IPC分类号： H02K5/167 ,  F16C32/06

CPC分类号： F16C33/723 ,  F16C17/026 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12

摘要： With a hydrodynamic bearing device 10, a first gap G1 is formed between a shaft 12 and a sleeve 11. A second gap G2 is formed between a sleeve cap 16 and the sleeve 11, and holds a lubricant 17. A thrust bearing member 21 is disposed near the inner peripheral surface of a center hole 16a of the sleeve cap 16. A third gap G3 is formed between the thrust bearing member 21 and the sleeve cap 16, and is open to the atmosphere. A fourth gap G4 is formed between the thrust bearing member 21 and the sleeve 11. The lubricant 17 circulates along a circulation passage that includes a communicating path 11b, the first gap G1 and the second gap G2.

摘要翻译： 利用流体动力轴承装置10，在轴12和套筒11之间形成第一间隙G1。在套筒盖16和套筒11之间形成第二间隙G2，并且保持润滑剂17.止推轴承部件21是 设置在套筒盖16的中心孔16a的内周面附近。第三间隙G3形成在推力轴承构件21和套筒盖16之间，并且向大气开放。 第四间隙G4形成在推力轴承部件21和套筒11之间。润滑剂17沿着包括连通路径11b，第一间隙G1和第二间隙G2的循环通道循环。

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.

公开(公告)号：US07622837B2

公开(公告)日：2009-11-24

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

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.

摘要翻译： 一组径向动压产生槽构成径向轴承，并且径向动压产生槽的整个宽度（L）减小。 形成构成推力轴承的一组推力动压生成槽，使得产生最大推力动压（直径）的区域增加，并且推力轴承的轴承角刚度增加。 具有高轴承角刚度的推力轴承共享施加到轴的力矩载荷，从而补偿径向轴承的轴承刚度，其轴承刚度较小，因为径向轴承的整个宽度较小。 因此，获得能够承受大的力矩载荷的薄型流体动力轴承。

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。

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。

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。

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。