公开(公告)号：US20090026864A1

公开(公告)日：2009-01-29

申请号：US12031512

申请日：2008-02-14

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： H02K21/28 ,  H01F13/00

CPC分类号： H02K21/029 ,  H02K21/028

摘要： In a magnet-exciting rotating electric machine, a magnetic field pole part opposing an armature is composed to be divided into a surface magnetic pole part and a magnetic excitation part so as to be capable of being relatively displaced. The magnetic excitation part supplies a magnetic flux to a magnetic salient pole. The magnetic flux from the field magnet is divided into a main magnetic flux pathway that circulates through the armature side and a bypass magnetic flux pathway that does not pass through the armature, and thereby, the magnetic flux of the main magnetic flux pathway is changed. The magnetic resistances of the main magnetic flux pathway and the bypass magnetic flux pathway are composed so that total magnetic flux amount from the field magnet is maintained constant, and then a magnetic force preventing the relative displacement is maintained small.

摘要翻译： 在励磁旋转电机中，与电枢相对的磁场极部分被构成为能够被相对位移地分成表面磁极部分和磁激励部分。 磁激励部分向磁性突极提供磁通量。 来自场磁体的磁通量被分成通过电枢侧循环的主磁通路径和不通过电枢的旁路磁通路径，从而改变主磁通路径的磁通量。 主磁通路径和旁路磁通路径的磁阻构成为使得来自场磁体的总磁通量保持恒定，然后保持防止相对位移的磁力小。

公开(公告)号：US06404087B1

公开(公告)日：2002-06-11

申请号：US09672506

申请日：2000-09-29

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： H02K516

CPC分类号： F16C33/1065 ,  F16C17/107 ,  F16C33/1085 ,  H02K5/1677 ,  H02K2205/09

摘要： Disk-drive motor having two hydrodynamnic bearing sections separated with respect to the shaft by an air intervention, each composed of a radial and a thrust dynamic-pressure bearing portion, and in each of which lubricant is retained continuously throughout the radial and thrust bearing portions At least one communicating pathway is formed in the sleeve, axially communicating the thrust faces that are constituents of, and retaining lubricant continuously with, the pair of thrust bearing portions. Via the communicating pathway, the lubricant retained in the two hydrodynamic bearing sections shifts mutually from the one section to the other, such that the radii of curvature of the meniscuses forming the respective boundaries arc equalized. The amount of lubricant held in the bearing sections is accordingly equalized and lubricant leaking out of the radial bearing portions is taken up and re-circulated.

摘要翻译： 磁盘驱动电机具有两个相对于轴分离的流体动力轴承部分，其中空气介入分别由径向和推力动压轴承部分组成，并且其中润滑剂连续地保持在整个径向和止推轴承部分 在套筒中形成至少一个连通通道，使一对推力轴承部分轴向连通作为构件的推力面，并将润滑剂与该对推力轴承部分保持连续。 通过连通路径，保持在两个流体动力轴承部分中的润滑剂从一个部分相互移动，使得形成相应边界的半月板的曲率半径相等。 因此，保持在轴承部分中的润滑剂的量相等，并且从径向轴承部分泄漏的润滑剂被吸收并再循环。

公开(公告)号：US06307293B1

公开(公告)日：2001-10-23

申请号：US09313208

申请日：1999-05-18

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： H02K709

CPC分类号： F16C39/063 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12 ,  G11B19/2009 ,  H02K5/1677 ,  H02K7/086 ,  H02K7/09

摘要： Thin-profile spindle motor. Single hydrodynamic-pressure thrust and radial bearings are established about a thrust plate on the end of the motor shaft, encompassed by a cylindrical casing. Hydrodynamic pressure-generating grooves scored on either of the thrust plate end faces, or either of the inner faces of the casing ends opposing the thrust plate end faces, are a component of the single thrust bearing. A micro-gap clearance for the thrust bearing, retaining lubricant continuously with the radial bearing, is established on whichever side of the thrust plate the thrust bearing is formed. Like grooves scored on either the thrust plate circumferential surface, or the casing inner cylindrical surface by which it is opposed at a micro-gap clearance, the clearance itself, and lubricant retained therein form the single radial bearing. Means for magnetically counterbalancing the thrust hydrodynamic-pressure are provided between rotor hub and the stator or casing.

摘要翻译： 薄型主轴电机。 单个流体动力学压力推力和径向轴承围绕电动机轴端部的推力板建立，由圆柱形壳体包围。 在推力板端面中的任一个上或者与推力板端面相对的壳体的内表面中的任一个上划分的流体动力学压力产生槽是单推力轴承的部件。 推力轴承的微间隙间隙，与径向轴承连续保持润滑剂，建立在止推板形成推力轴承的任何一侧。 在推力板圆周表面上的凹槽或与微隙间隙相对的壳体内圆柱表面上的凹槽相同，间隙本身和保留在其中的润滑剂形成单个径向轴承。 用于磁力平衡推力流体动力学压力的装置设置在转子毂和定子或壳体之间。

公开(公告)号：US6126320A

公开(公告)日：2000-10-03

申请号：US432017

申请日：1999-11-02

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： F16C17/10 ,  F16C33/10 ,  F16C33/74 ,  G11B19/20

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/1085 ,  F16C33/745 ,  G11B19/2018 ,  F16C2370/12

摘要： In a hydrodynamic pressure bearing according to the present invention, the lubricating fluid held in the radial bearing portion is pumped toward the thrust bearing portion by grooves formed in the radial bearing portion. And the hydrodynamic pressure bearing is provided with a circumferential groove formed in the vicinity of the boundary region between the radial and thrust bearing portions so as to control the flow of lubricating fluid between the bearing portions depending on the amount of lubricating fluid held therein. The circumferential groove is formed on the sleeve member near the inner opening of a communicating hole which in turn axially passes through the thrust plate and communicates the gap defined by the shaft and the sleeve member therebetween with the external atmosphere. While a predetermined amount of lubricating fluid is retained in the gap, some extra lubricating fluid is also retained in the vicinity of the inner opening of the communicating hole. As the lubricating fluid is reduced by evaporation or other factors, air enters the gap through the communicating hole by the effect of atmospheric pressure. The air is retained near the circumferential groove and separates the lubricating fluid into the radial bearing portion and the thrust bearing portion. As a result, the flow of the lubricating fluid is interrupted.

公开(公告)号：US5879084A

公开(公告)日：1999-03-09

申请号：US854920

申请日：1997-05-13

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： F16C17/00 ,  F16C33/10 ,  F16N37/00 ,  G11B19/20 ,  F16C17/10

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/10 ,  F16C33/103 ,  F16N37/003 ,  G11B19/2018 ,  F16C2370/12

摘要： A hydrodynamic bearing according to this invention and an electric motor with this hydrodynamic bearing include a shaft having a lubricating-fluid filling hole, one end of which is open toward the outside of the motor and the other end of which leads to the gap between the shaft and a sleeve in which lubricating fluid is filled. At least part of the filling hole except for the opening facing the outside of the motor has a smaller diameter than that of the outer opening. An elastic member formed of elastic material is inserted into the lubricating fluid fillng hole.

摘要翻译： 根据本发明的流体动力轴承和具有该流体动力轴承的电动机包括具有润滑流体填充孔的轴，其一端朝向电动机的外部敞开，另一端通向电动机之间的间隙 轴和其中填充润滑流体的套筒。 除了面向电动机外部的开口之外，填充孔的至少一部分具有比外开口更小的直径。 由弹性材料形成的弹性构件插入到润滑液填充孔中。

公开(公告)号：US20060039636A1

公开(公告)日：2006-02-23

申请号：US11109691

申请日：2005-04-20

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： F16C32/06

摘要： A fixed shaft type fluid dynamic bearing motor having two interfaces of a lubricant at least, in which a channel leading from near the outer region of a rotating sleeve top end to near the periphery of the bottom of the sleeve is formed in the sleeve. The lubricant near the outer region of a rotating sleeve top end is thrown out into the channel by centrifugal force, and further conveyed to near the periphery of the bottom of the sleeve by centrifugal force and/or by slanted channel in circumferential direction. A dynamic-pressure generating groove for pumping the lubricant toward the top end of the sleeve is formed between the fixed shaft and the sleeve. The dynamic-pressure generating groove and the centrifugal force cause the circulation of the lubricant, thereby sealing the lubricant. According to the invention, axial space smaller than that of tapered seals can be utilized to achieve a low-profile recording disk drive.

摘要翻译： 至少具有两个润滑剂界面的固定轴型流体动力轴承马达，其中，在所述套筒中形成有从所述套筒的顶端的外部区域的附近靠近所述套筒底部周边的通道。 靠近旋转套筒顶端的外部区域附近的润滑剂通过离心力被排出到通道中，并且通过离心力和/或通过倾斜通道在圆周方向上进一步输送到套筒底部的周边附近。 在固定轴和套筒之间形成用于将润滑剂朝向套筒顶端泵送的动压产生槽。 动压发生槽和离心力导致润滑剂的循环，从而密封润滑剂。 根据本发明，可以利用比锥形密封件小的轴向空间来实现低调的记录盘驱动器。

公开(公告)号：US20060002641A1

公开(公告)日：2006-01-05

申请号：US11204057

申请日：2005-08-16

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： F16C32/06

CPC分类号： H02K7/086 ,  F16C17/105 ,  F16C17/107 ,  F16C33/107 ,  F16C33/745 ,  F16C2370/12

摘要： A fixed shaft type fluid dynamic bearing motor having two interfaces of a lubricating fluid, in which a channel leading from near the top end of the inner periphery of a rotating sleeve to near the periphery of the bottom of the sleeve is formed in the sleeve. The lubricating fluid near the top end of the inner periphery of the sleeve is thrown out into the channel by centrifugal force, and further conveyed to near the periphery of the bottom of the sleeve by centrifugal force and/or by slanted channel in circumferential direction. A dynamic-pressure generating groove for pumping the lubricating fluid toward the top end of the sleeve is formed between the fixed shaft and the sleeve. The dynamic-pressure generating groove and the centrifugal force cause the circulation of the lubricating fluid, thereby sealing the lubricating fluid. For bearing configuration, a cone bearing or a cylindrical bearing can be used to achieve a low profile. The axial space smaller than that of tapered seals can be utilized to achieve a low-profile recording disk drive.

摘要翻译： 一种固定轴型流体动力轴承马达，其具有润滑流体的两个界面，其中在套筒中形成有从旋转套筒的内周的顶端附近靠近套筒底部周边的通道。 通过离心力将套筒内周的顶端附近的润滑液通过离心力和/或沿圆周方向的倾斜通道输送到套筒底部的周围附近。 在固定轴和套筒之间形成用于将润滑流体朝向套筒的顶端泵送的动压产生槽。 动压产生槽和离心力引起润滑流体的循环，从而密封润滑流体。 对于轴承配置，锥形轴承或圆柱形轴承可用于实现低轮廓。 可以利用小于锥形密封件的轴向空间来实现低轮廓记录盘驱动器。

公开(公告)号：US06664686B2

公开(公告)日：2003-12-16

申请号：US09983950

申请日：2001-10-26

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： H02K709

CPC分类号： F16C25/045 ,  F16C17/045 ,  F16C17/102 ,  F16C23/04 ,  F16C33/043 ,  F16C33/201 ,  F16C2370/12 ,  H02K7/088 ,  H02K7/09

摘要： A single cone air dynamic bearing motor, including a shaft having a diminishing conical taper surface, a sleeve having a concavity opposite the shaft, and magnetic members to generate magnetic attraction between the shaft end and the sleeve. Grooves are formed on the conical taper surface of the shaft or the sleeve so as to create load capacity when the motor rotates, whereby rotating parts of the motor are supported by the axial components of the load capacity balanced with the magnetic attraction. The motor thereby achieves reduction in thickness, current, and cost, and inhibits non-repeatable runout.

公开(公告)号：US06250808B1

公开(公告)日：2001-06-26

申请号：US09441884

申请日：1999-11-17

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： F16C3206

CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/045 ,  F16C33/1015 ,  F16C41/002 ,  F16C2202/32 ,  F16C2370/12 ,  G11B19/2009

摘要： A motor includes a stationary shaft and a rotatable rotor hub disposed about the stationary shaft. The rotor hub is adapted to support a magnetic storage disk such a hard disk. The motor includes thrust oil dynamic pressure bearings that axial support the rotor hub on the stationary shaft. The motor also includes radial gas-lubricated dynamic bearings that radially support the rotor hub on the stationary shaft. The thrust oil dynamic pressure bearings include electrically conductive fluid lubricant that provides a ground between the rotor hub and the stationary shaft thereby preventing undesirable discharges of electrostatic charges that may build up on the magnetic storage disk.

摘要翻译： 电动机包括固定轴和围绕静止轴设置的可旋转转子毂。 转子毂适于支撑诸如硬盘的磁存储盘。 电机包括轴向支撑固定轴上的转子轮毂的推力油动压轴承。 电机还包括径向支撑固定轴上的转子轮毂的径向气体润滑动态轴承。 推力油动压轴承包括导电流体润滑剂，其在转子毂和固定轴之间提供接地，从而防止可能积聚在磁存储盘上的不期望的静电电荷放电。

公开(公告)号：US06211592B1

公开(公告)日：2001-04-03

申请号：US09535960

申请日：2000-03-27

申请人： Yoshikazu Ichiyama

发明人： Yoshikazu Ichiyama

IPC分类号： H02K516

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C2370/12 ,  H02K5/1677

摘要： A storage-disk drive motor miniaturized and made thinner by eliminating the conventional thrust plate for the rotor-hub thrust dynamic pressure-generating bearing, and by employing only one rotor-hub radial dynamic pressure-generating bearing. The motor is inner-rotor type wherein the rotor magnet is radially inward of the stator. To maintain thrust bearing rigidity absent the thrust plate, the stator/bracket and the rotor magnet are configured such that magnetism between them imparts a energizing force to the rotor hub biasing it axially, and at the same time, specially striated dynamic-pressure-generating grooves in the rotor hub bearings generate thrust to balance this energizing force. Due to the special rotor-hub bearing configuration, the means for venting the lubricant retained in the bearing micro-gaps are modified accordingly.

摘要翻译： 通过消除用于转子毂推力动压发生轴承的常规推力板，并且仅使用一个转子毂径向动压产生轴承，使存储盘驱动电动机小型化并制成更薄。 电机是内转子型，其中转子磁体位于定子的径向内侧。 为了保持止推板没有推力轴承的刚度，定子/支架和转子磁体被构造成使得它们之间的磁力赋予转子毂轴向偏压的激励力，同时，特别地条纹的动压产生 转子轮毂轴承中的凹槽产生推力以平衡该通电力。 由于特殊的转子 - 轮毂轴承结构，相应地修改了保留在轴承微间隙中的润滑剂的排气装置。