公开(公告)号：US08033732B2

公开(公告)日：2011-10-11

申请号：US12179067

申请日：2008-07-24

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito ,  Shigeo Obata

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito ,  Shigeo Obata

IPC分类号： F16C32/06

CPC分类号： G11B17/0284 ,  F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12

摘要： In a hydrodynamic bearing device with which the lubricant is prevented from leaking to the outside, and good seal performance can be maintained, and in a spindle motor equipped with this hydrodynamic bearing device, the hydrodynamic bearing device includes a shaft, a sleeve, a lubricant that fills a microscopic gap, a radial bearing portion, a thrust bearing portion, and a bearing seal portion. The value of a function P1/V1, where V1 is a fluctuation volume of the sleeve in the axial direction and P1 is a capillary pressure index at a vapor-liquid interface located near the opened end of the bearing seal portion, is at least a specific value.

摘要翻译： 在防止润滑剂泄漏到外部的流体动力轴承装置中，并且可以保持良好的密封性能，并且在配备有该流体动力轴承装置的主轴电机中，流体动力轴承装置包括轴，套筒，润滑剂 其填充微观间隙，径向轴承部分，止推轴承部分和轴承密封部分。 功能P1 / V1的值，其中V1是套筒在轴向上的波动体积，P1是位于轴承密封部的开口端附近的气液界面处的毛细管压力指数，至少为 具体价值。

公开(公告)号：US20090028474A1

公开(公告)日：2009-01-29

申请号：US12179067

申请日：2008-07-24

申请人： Takafumi ASADA ,  Hiroaki Saito ,  Daisuke Ito ,  Shigeo Obata

发明人： Takafumi ASADA ,  Hiroaki Saito ,  Daisuke Ito ,  Shigeo Obata

IPC分类号： F16C32/06

CPC分类号： G11B17/0284 ,  F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12

摘要： There is provided a hydrodynamic bearing device with which the lubricant is prevented from leaking to the outside, and good seal performance can be maintained, and a spindle motor equipped with this hydrodynamic bearing device. The hydrodynamic bearing device comprises a shaft, a sleeve, a lubricant that fills a microscopic gap, a radial bearing portion, a thrust beating portion, and a bearing seal portion. The value of a function P1/V1, where V1 is a fluctuation volume of the sleeve in the axial direction and P1 is a capillary pressure index at a vapor-liquid interface located near the opened end of the bearing seal portion, is at least a specific value.

摘要翻译： 提供了一种防止润滑剂泄漏到外部的流体动力轴承装置，并且可以保持良好的密封性能，以及配备有该流体动力轴承装置的主轴电机。 流体动力轴承装置包括轴，套筒，填充微小间隙的润滑剂，径向轴承部分，推力打浆部分和轴承密封部分。 功能P1 / V1的值，其中V1是套筒在轴向上的波动体积，P1是位于轴承密封部的开口端附近的气液界面处的毛细管压力指数，至少为 具体价值。

公开(公告)号：US20090083772A1

公开(公告)日：2009-03-26

申请号：US11570000

申请日：2006-01-12

申请人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Yoshiro Ueno

发明人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Yoshiro Ueno

IPC分类号： G11B7/00

CPC分类号： G11B17/0287 ,  G11B17/038

摘要： There is provided a disk apparatus having a clamp structure, which can fix a disk in a stable manner with a simple construction. More specifically, the disk apparatus includes a hub having a disk inserting portion having a cylindrical plane in the outer part of one end and a disk receiving portion having a flat part and being pivotably supported, a head having an inner hole through which the disk inserting portion is fitted, facing toward one face of a disk, levitating and scanning above the disk and reading a signal recorded on the disk or recording a signal on the disk, the disk being held by the disk receiving portion, and a clamp unit holding the disk with the disk receiving portion. In this case, the disk receiving portion has an inclined or declined plane. Thus, the amount and direction of deformation of the disk, which is caused by clamping, are defined, and obtaining a stable amount of head levitation independently of temperature changes can prevent the occurrence of a distortion of the disk. Therefore, a decrease in head output, for example, can be prevented, and the reliability can be improved.

摘要翻译： 提供一种具有夹紧结构的盘装置，其能够以简单的结构以稳定的方式固定盘。 更具体地说，盘装置包括具有盘插入部分的轮毂，盘片插入部分在一端的外部具有圆柱形平面，盘片接收部分具有平坦部分并且可枢转地支撑，头部具有内孔，盘插入 安装面向盘的一个面的部分，悬浮并在盘上方扫描并读取记录在盘上的信号或在盘上记录信号，盘被盘接收部分保持，夹持单元保持 磁盘与磁盘接收部分。 在这种情况下，盘接收部分具有倾斜或倾斜的平面。 因此，限定由夹紧引起的盘的变形量和方向，并且独立于温度变化获得稳定的头部悬浮量可以防止盘的变形的发生。 因此，可以防止例如头部输出的减少，并且可以提高可靠性。

公开(公告)号：US07317271B2

公开(公告)日：2008-01-08

申请号：US11362180

申请日：2006-02-27

申请人： Shigeo Obata ,  Kaoru Matsuoka ,  Hideki Kuwajima ,  Kenichi Miyamori ,  Hiromitsu Noda

发明人： Shigeo Obata ,  Kaoru Matsuoka ,  Hideki Kuwajima ,  Kenichi Miyamori ,  Hiromitsu Noda

IPC分类号： H02K5/16

CPC分类号： F16C33/107 ,  F16C17/10 ,  F16C2370/12 ,  G11B19/2009 ,  H02K7/086

摘要： The stop ring having a surface nearly vertical to the rotational center axis, which is projected at the inner periphery of the hollow cylinder of the rotor section, and the stepped surface of the fixed shaft secured on the chassis are opposed to each other with a predetermined slight clearance provided therebetween. The clearance is filled with magnetic fluid, and further, a permanent magnet is disposed on the chassis, opposing to the other surface of the stop ring.

摘要翻译： 具有与旋转中心轴线几乎垂直的表面的止挡环突出在转子部分的中空圆筒的内周，并且固定在底盘上的固定轴的台阶表面以预定的方式彼此相对 在它们之间提供微小的间隙。 间隙填充有磁性流体，此外，永磁体设置在底盘上，与止动环的另一个表面相对。

公开(公告)号：US06217218B1

公开(公告)日：2001-04-17

申请号：US09418005

申请日：1999-10-14

申请人： Hiroshi Inoue ,  Masashi Omura ,  Hiromichi Inomata ,  Kaoru Matsuoka ,  Shigeo Obata

发明人： Hiroshi Inoue ,  Masashi Omura ,  Hiromichi Inomata ,  Kaoru Matsuoka ,  Shigeo Obata

IPC分类号： F16C3372

CPC分类号： F16C33/107 ,  F16C33/103 ,  F16C33/74 ,  F16C2202/60 ,  F16C2370/12 ,  G11B19/2018 ,  H02K5/1675

摘要： A hydrodynamic bearing spindle motor comprising: a fixed member which has a radial bearing portion; a rotational member; a rotary shaft which is rotatably supported by the radial bearing portion of the fixed member and is secured to a substantially central location of the rotational member so as to extend in a vertical direction of the hydrodynamic bearing spindle motor such that the rotational member is disposed above the fixed member; lubricant which is provided between the radial bearing portion of the fixed member and the rotary shaft; a projection which is provided on a lower face of the rotational member so as to be disposed radially outwardly of the rotary shaft and has an oblique inner periphery expanding gradually radially outwardly towards a distal end of the projection; a lubricant receiving member which is secured to an upper face of the fixed member so as to be disposed radially outwardly of the projection; and oil repellent for repelling the lubricant, which is applied to the projection and its vicinity; wherein the lubricant receiving member is provided at a location to which the lubricant repelled by the oil repellent and scattered from the projection through rotation of the rotational member adheres.

摘要翻译： 一种流体动力轴承主轴电机，包括：具有径向轴承部分的固定部件; 旋转构件; 旋转轴，其由所述固定构件的径向支承部分可旋转地支撑并且固定到所述旋转构件的大致中心位置，以沿所述流体动力轴承主轴电机的垂直方向延伸，使得所述旋转构件设置在所述旋转轴的上方 固定件; 设置在固定构件的径向支承部分和旋转轴之间的润滑剂; 所述突起设置在所述旋转构件的下表面上，以便设置在所述旋转轴的径向外侧，并且具有朝着所述突起的远端逐渐径向向外扩张的倾斜内周; 润滑剂接收构件，其固定到所述固定构件的上表面，以便设置在所述突起的径向外侧; 以及用于排斥施加到所述突起及其附近的润滑剂的防油剂; 其中所述润滑剂接收构件设置在所述斥油斥斥的所述润滑剂通过所述旋转构件的旋转从所述突起散射的位置。

公开(公告)号：US07787214B2

公开(公告)日：2010-08-31

申请号：US11570000

申请日：2006-01-12

申请人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Yoshiro Ueno

发明人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Yoshiro Ueno

IPC分类号： G11B17/038

CPC分类号： G11B17/0287 ,  G11B17/038

摘要： A disk apparatus includes a hub having a disk inserting portion having a cylindrical plane in the outer part of one end and a disk receiving portion having a flat part and being pivotably supported, a head having an inner hole through which the disk inserting portion is fitted, facing toward one face of a disk, levitating and scanning above the disk and reading a signal recorded on the disk or recording a signal on the disk, the disk being held by the disk receiving portion, and a clamp unit holding the disk with the disk receiving portion. In this case, the disk receiving portion has an inclined or declined plane. Thus, the amount and direction of deformation of the disk, which is caused by clamping, are defined, and obtaining a stable amount of head levitation independently of temperature changes can prevent the occurrence of a distortion of the disk.

摘要翻译： 磁盘装置包括具有盘插入部分的轮毂，盘片插入部分在一端的外部具有圆柱形平面，盘片接收部分具有平坦部分并被可枢转地支撑，头部具有内孔，盘插入部分穿过该内孔 面对盘的一个面，在盘上方悬浮并扫描并读取记录在盘上的信号或在盘上记录信号，盘由盘接收部分保持，以及夹持单元， 盘接收部分。 在这种情况下，盘接收部分具有倾斜或倾斜的平面。 因此，限定由夹紧引起的盘的变形量和方向，并且独立于温度变化获得稳定的头部悬浮量可以防止盘的变形的发生。

公开(公告)号：US20090072642A1

公开(公告)日：2009-03-19

申请号：US11912948

申请日：2006-05-19

申请人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Hiromi Kita

发明人： Kenichi Miyamori ,  Shigeo Obata ,  Hiromitsu Noda ,  Hiromi Kita

IPC分类号： H02K5/16

CPC分类号： G11B33/12 ,  G11B19/2009 ,  G11B33/123 ,  H02K7/085

摘要： A spindle motor and a disk drive device are provided that has a high operation efficiency of the motor, that does not leak oil, and that has an improved stability by decreasing a runout component in the direction of the rotation axis. The spindle motor includes rotor hub (20) composed of disk-like flange (201) and cylinder-shaped shaft (203); ring-shaped rotating magnet (16) fastened on one main surface of flange (201); armature (14) facing rotating magnet (16); sleeve (80) rotatably supporting shaft (203); and chassis (15) fixing armature (14) and sleeve (80). Flange (201) and shaft (203) are integrally formed with magnetic material; a protrusion is not provided between mounting surface (204) for mounting rotating magnet (16) thereon and counter-face surface (205) facing the end surface of the sleeve; and additionally mounting surface (204) and counter-face surface (205) are orthogonal to the direction of the central axis (A-A′) of shaft (203), and in a level plane; or mounting surface (204) is recessed stepwise from counter-face surface (205) toward disk mounting portion (202).

摘要翻译： 提供了一种主轴电动机和磁盘驱动装置，其具有电动机的高操作效率，不会漏油，并且通过减小旋转轴线的方向上的跳动分量而具有改善的稳定性。 主轴电动机包括由盘状凸缘（201）和圆柱形轴（203）构成的转子轮毂（20）。 紧固在凸缘（201）的一个主表面上的环形旋转磁体（16）; 电枢（14）面对旋转磁体（16）; 套筒（80）可旋转地支撑轴（203）; 和固定电枢（14）和套筒（80）的底架（15）。 凸缘（201）和轴（203）与磁性材料一体形成; 在其上安装旋转磁体（16）的安装表面（204）和面向套筒的端表面的反面（205）之间不设置突起; 另外安装表面（204）和反面表面（205）与轴（203）的中心轴线（A-A'）的方向垂直，并且在平面中; 或安装面（204）从对置面（205）朝向盘安装部（202）逐步凹陷。

公开(公告)号：US07435001B2

公开(公告)日：2008-10-14

申请号：US11443015

申请日：2006-05-31

申请人： Naoshi Kainoh ,  Akihito Shirai ,  Shigeo Obata ,  Youichi Nishimoto ,  Junichi Nakamura ,  Tomohiro Haga

发明人： Naoshi Kainoh ,  Akihito Shirai ,  Shigeo Obata ,  Youichi Nishimoto ,  Junichi Nakamura ,  Tomohiro Haga

IPC分类号： F16C32/06

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

摘要： A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing device 4 includes a lube repellant 11a which is applied in a circular shape by a predetermined distance in a radial direction from a portion of an upper surface of a second thrust flange 41c where it is connected to a shaft 41 and a lube repellant 11b which is applied in a circular shape on an outer peripheral surface of the second thrust flange 41c below from an upper end in the radial direction by a predetermined distance. The lube repellant 11b is applied near the upper end portion in a gap formed between the outer peripheral surface of the second thrust flange 41c and an inner peripheral surface of an outer sleeve 44.

摘要翻译： 提供一种流体动力轴承装置，其能够提高注射润滑剂的可操作性并有效防止润滑剂的泄漏，其制造方法，主轴电机和记录和再现装置。 流体动力轴承装置4包括润滑剂驱动剂11a，该润滑剂驱动剂11a从其与轴41连接的第二推力凸缘41c的上表面的一部分沿径向施加预定距离的圆形形状，并且 润滑剂驱动剂11b，其从径向上的上端预定距离在第二推力凸缘41c的外周面上以圆形形式施加。 润滑剂驱避剂11b在第二推力凸缘41c的外周面与外套筒44的内周面之间形成的间隙中被施加在上端部附近。

公开(公告)号：US07160031B2

公开(公告)日：2007-01-09

申请号：US10990486

申请日：2004-11-18

申请人： Hiromi Kita ,  Shigeo Obata ,  Kenichi Miyamori ,  Hiromitsu Noda

发明人： Hiromi Kita ,  Shigeo Obata ,  Kenichi Miyamori ,  Hiromitsu Noda

IPC分类号： F16C32/06

CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2009

摘要： In order to prevent lubricating oil leakage due to bubbles in a thrust dynamic pressure bearing having herringbone grooves, and to stabilize the bearing performance, and enhance the reliability and durability, auxiliary grooves deeper than pump-in type herringbone grooves for generating dynamic pressure are provided. The bearing inner periphery and bearing outer periphery are linked by a pressure gradient descending slowly, and therefore bubbles present in the bearing inner periphery can be guided to the bearing outer periphery through the auxiliary grooves, and discharged outside of the bearing from the air-liquid interface, so that lubricating oil leakage due to bubbles can be prevented.

摘要翻译： 为了防止由于具有人字槽的推力动压轴承中的气泡导致的润滑油泄漏，并且为了稳定轴承性能，提高可靠性和耐久性，提供了比用于产生动压的泵入型人字槽更深的辅助槽 。 轴承内周和轴承外周通过缓慢下降的压力梯度连接，因此存在于轴承内周中的气泡可以通过辅助槽被引导到轴承外周，并从轴承的外部排出空气 - 液体 界面，从而可以防止由于气泡而导致的润滑油泄漏。

公开(公告)号：US20060152097A1

公开(公告)日：2006-07-13

申请号：US11362180

申请日：2006-02-27

申请人： Shigeo Obata ,  Kaoru Matsuoka ,  Hideki Kuwajima ,  Kenichi Miyamori ,  Hiromitsu Noda

发明人： Shigeo Obata ,  Kaoru Matsuoka ,  Hideki Kuwajima ,  Kenichi Miyamori ,  Hiromitsu Noda

IPC分类号： H02K5/16 ,  H02K7/08

CPC分类号： F16C33/107 ,  F16C17/10 ,  F16C2370/12 ,  G11B19/2009 ,  H02K7/086

摘要： The stop ring having a surface nearly vertical to the rotational center axis, which is projected at the inner periphery of the hollow cylinder of the rotor section, and the stepped surface of the fixed shaft secured on the chassis are opposed to each other with a predetermined slight clearance provided therebetween. The clearance is filled with magnetic fluid, and further, a permanent magnet is disposed on the chassis, opposing to the other surface of the stop ring.

摘要翻译： 具有与旋转中心轴线几乎垂直的表面的止挡环突出在转子部分的中空圆筒的内周，并且固定在底盘上的固定轴的台阶表面以预定的方式彼此相对 在它们之间提供微小的间隙。 间隙填充有磁性流体，此外，永磁体设置在底盘上，与止动环的另一个表面相对。