公开(公告)号：US06469866B1

公开(公告)日：2002-10-22

申请号：US09504043

申请日：2000-02-14

申请人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

发明人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

IPC分类号： G11B1920

CPC分类号： H02K7/09 ,  F16C17/028 ,  F16C17/045 ,  F16C17/047 ,  F16C17/10 ,  F16C17/26 ,  F16C33/1035 ,  F16C33/107 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K7/085

摘要： A rotary shaft is rotatably supported by a hydrodynamic fluid radial bearing and a hydrodynamic fluid thrust bearing which are excellent in shock resistance, an bearing arrangement in which vibration in a translation mode of the shaft, among vibration components caused by unbalance force exerted to the rotary shaft, is supported by the radial bearing, and vibration in conical mode is supported by the thrust bearing, magnetic fluid is used as lubrication oil, and a permanent magnet is located between the radial bearing and the thrust bearing so as to apply a magnetic attracting force between the rotary shaft and the thrust bearing so as to carry out axial positioning in order to use the magnetic disc device in an arbitrary attaching posture. With this arrangement, the magnetic disc device using such a bearing arrangement can enhance portability, thinning and antishock ability, and reduce noise and power consumption, thereby it is possible to provide a note-type personal computer with a high degree of reliability.

摘要翻译： 旋转轴由能够抗冲击性优异的流体动力流体径向轴承和流体动力学流体推力轴承可旋转地支撑，轴承装置，其中轴的平移模式中的振动由施加到旋转体的不平衡力引起的振动分量之中 轴由径向轴承支撑，锥形模式的振动由推力轴承支撑，磁流体用作润滑油，永磁体位于径向轴承和推力轴承之间，以便施加磁吸力 旋转轴和推力轴承之间的力，以便执行轴向定位，以便以任意的安装姿势使用磁盘装置。 通过这种布置，使用这种轴承装置的磁盘装置可以提高便携性，变薄和抗震能力，并且降低噪声和功耗，从而可以提供具有高度可靠性的笔记型个人计算机。

公开(公告)号：US06771460B2

公开(公告)日：2004-08-03

申请号：US10214576

申请日：2002-08-09

申请人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

发明人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

IPC分类号： G11B1920

CPC分类号： H02K7/09 ,  F16C17/028 ,  F16C17/045 ,  F16C17/047 ,  F16C17/10 ,  F16C17/26 ,  F16C33/1035 ,  F16C33/107 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K7/085

摘要： A spindle motor for magnetic disc device includes a hub having an inside and an outer peripheral side on which a magnetic disc is mounted, a rotary shaft having an axial direction and coupled with the hub so as to be integrally rotated therewith, with the motor being arranged on the inside of the hub. The hub, the rotary shaft and a part of the motor constitute a rotary body. A radial bearing having a length in the axial direction of the rotary shaft, for supporting the rotary body in a direction crossing the rotary shaft, and a thrust bearing for supporting the rotary body in the axial direction of the rotary shaft are provided. The thrust bearing has an outer diameter greater than the length of the radial bearing, and is arranged at a position which is inside of the motor and diametrically inward of the hub.

摘要翻译： 一种用于磁盘装置的主轴电动机包括具有安装有磁盘的内周侧和外周侧的轮毂，具有轴向并与轮毂一体旋转的旋转轴，其中电机为 布置在轮毂的内侧。 轮毂，旋转轴和马达的一部分构成旋转体。 本发明提供一种径向轴承，该径向轴承具有沿着旋转轴的轴向的长度，用于沿与该旋转轴相交叉的方向支撑旋转体，以及用于在旋转轴的轴向方向上支撑旋转体的止推轴承。 推力轴承的外径大于径向轴承的长度，并且布置在位于马达内部且径向向内的毂的位置。

公开(公告)号：US06680814B2

公开(公告)日：2004-01-20

申请号：US10232690

申请日：2002-09-03

申请人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

发明人： Katsutoshi Nii ,  Masaru Muranishi ,  Shozo Saegusa ,  Tsuyoshi Takahashi ,  Kenji Tomida ,  Takashi Matsuki ,  Yuuichi Yanagase ,  Mitsuyuki Tsuyuki ,  Shinobu Yoshida ,  Hiroshi Nishida ,  Kazuhiko Kawakami

IPC分类号： G11B1920

CPC分类号： H02K7/09 ,  F16C17/028 ,  F16C17/045 ,  F16C17/047 ,  F16C17/10 ,  F16C17/26 ,  F16C33/1035 ,  F16C33/107 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K7/085

摘要： A spindle motor used in a magnetic disc apparatus having a hub to which a magnetic disc is mounted and a rotary shaft to which the hub is fixed. The rotary shaft is located in a bearing casing having one end opened and the other end closed by a hydrodynamic pressure radial bearing, the rotary shaft being supported by a hydrodynamic pressure thrust bearing and the hydrodynamic pressure radial bearing. An inner diameter D and a width L of the hydrodynamic pressure radial bearing having a relationship of L/D

摘要翻译： 在具有安装有磁盘的轮毂的磁盘装置中使用的主轴电动机和固定有轮毂的旋转轴。 旋转轴位于轴承壳体中，其一端打开，另一端由流体动压力径向轴承封闭，旋转轴由流体动压推力轴承和流体动压力径向轴承支撑。 具有L / D <1的关系的流体动压力径向轴承的内径D和宽度L。