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    Method of cutting grooves in hydrodynamic bearing made of ceramic material
    3.
    发明公开
    Method of cutting grooves in hydrodynamic bearing made of ceramic material 失效
    韦尔法罕zum Schneiden von Rillen在ein hydrodynamisches Lager aus keramischem Werkstoff。

    公开(公告)号：EP0488402A2

    公开(公告)日：1992-06-03

    申请号：EP91120588.8

    申请日：1991-11-29

    申请人： EBARA CORPORATION

    发明人： Noda, Yumiko ,  Kamiya, Ichiro ,  Toshimitsu, Manabu ,  Sato, Yoshio ,  Shinjo, Ryoichi

    IPC分类号： B23K26/00 ,  F16C33/10 ,  F16C33/04

    CPC分类号： F16C33/107 ,  B23K26/364 ,  B23K26/40 ,  B23K2203/52 ,  F16C17/045 ,  F16C33/043

    摘要： A ceramic hydrodynamic bearing used as a radial or a thrust bearing in a spindle motor for a hard disk driver. The bearing includes a ceramic bearing base having hydrodynamic pressure generating grooves. A sliding surface of the bearing base is irradiated with an energy beam with a high energy density to remove said material, thereby forming hydrodynamic pressure generating groove, and at the same time the grooves are coated with a modification layer that is formed by melting the ceramic material that constitutes said ceramic bearing base with the energy beam and by solidifying said ceramic bearing base.

    摘要翻译： 陶瓷流体动力轴承用作用于硬盘驱动器的主轴电机中的径向或推力轴承。 轴承包括具有流体动力学压力产生槽的陶瓷轴承座。 用高能量密度的能量束照射轴承座的滑动表面以去除所述材料，从而形成流体动力学压力产生槽，同时，凹槽涂覆有通过熔化陶瓷形成的改性层 用能量束构成所述陶瓷轴承座的材料，并且固化所述陶瓷轴承座。

    Bearing structure
    5.
    发明公开
    Bearing structure 失效
    Lagervorrichtung。

    公开(公告)号：EP0412509A2

    公开(公告)日：1991-02-13

    申请号：EP90115177.9

    申请日：1990-08-07

    申请人： EBARA CORPORATION

    发明人： Konno, Daisuke ,  Miwa, Sachihiko ,  Aiyoshizawa, Shunichi ,  Kasahara, Kazuyuki ,  Sato, Yoshio ,  Hirokawa, Kazuto ,  Noda, Yumiko

    IPC分类号： F16C33/10

    CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C39/063 ,  F16C2370/12 ,  G11B19/2018

    摘要： A bearing structure suitable for a spindle motor or the like, which enables such a motor to rotate with minimal vibrations. The bearing structure comprises a stator (9) including a support shaft which is disposed on a base, and a rotor (7) which is rotatably disposed around the support shaft (2). A radial hydrodynamic bearing and a thrust hydrodynamic bearing are disposed between the stator (9) and the rotor (7). The stator (9) has the support shaft (2), a thrust plate (3) and a radial cylindrical member (4) which is concentric with the support shaft (2). The thrust plate (3) is secured to an end surface of the radial cylindrical member (4). The support shaft (2) extends through the centers of the radial cylindrical member (4) and the thrust plate (3). The rotor (7) has a radial sleeve. The radial hydrodynamic bearing is formed from the inner peripheral surface of the radial sleeve (6) and the outer peripheral surface of the radial cylindrical member (4), which face each other and either of which is formed with herringbone-shaped grooves (C1) for generating dynamic pressure. The thrust hydro­dynamic bearing is formed from an end surface of the radial sleeve (6) and a sliding surface of the thrust plate (3), which face each other and either of which is formed with spiral grooves (C1) for generating dynamic pressure. A rolling beading (24) may be added in order to minimize the starting torque in the bearing structure.

    摘要翻译： 适用于主轴电动机等的轴承结构，其能够使电动机以最小的振动旋转。 所述轴承结构包括定子（9），所述定子（9）包括设置在基座上的支撑轴以及围绕所述支撑轴（2）可旋转地设置的转子（7）。 在定子（9）和转子（7）之间设置径向流体动力轴承和推力流体动力轴承。 定子（9）具有与支撑轴（2）同心的支撑轴（2），推力板（3）和径向圆柱形构件（4）。 推力板（3）固定在径向圆柱形构件（4）的端面上。 支撑轴（2）延伸穿过径向圆柱形构件（4）和止推板（3）的中心。 转子（7）具有径向套筒。 径向流体动力轴承由径向套筒（6）的内周表面和径向圆柱形构件（4）的外周表面形成，它们彼此面对，并且其中之一形成有人字形槽（C1） 用于产生动态压力。 推力流体动力轴承由径向套筒（6）的端面和推力板（3）的滑动面形成，它们彼此面对，并且其中之一形成有用于产生动压的螺旋槽（C1）。 可以添加滚动滚珠（24），以便使轴承结构中的启动扭矩最小化。

    Bearing structure
    7.
    发明公开
    Bearing structure 失效
    轴承结构

    公开(公告)号：EP0412509A3

    公开(公告)日：1992-02-26

    申请号：EP90115177.9

    申请日：1990-08-07

    申请人： EBARA CORPORATION

    发明人： Konno, Daisuke ,  Miwa, Sachihiko ,  Aiyoshizawa, Shunichi ,  Kasahara, Kazuyuki ,  Sato, Yoshio ,  Hirokawa, Kazuto ,  Noda, Yumiko

    IPC分类号： F16C33/10

    CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C39/063 ,  F16C2370/12 ,  G11B19/2018

    摘要： A bearing structure suitable for a spindle motor or the like, which enables such a motor to rotate with minimal vibrations. The bearing structure comprises a stator (9) including a support shaft which is disposed on a base, and a rotor (7) which is rotatably disposed around the support shaft (2). A radial hydrodynamic bearing and a thrust hydrodynamic bearing are disposed between the stator (9) and the rotor (7). The stator (9) has the support shaft (2), a thrust plate (3) and a radial cylindrical member (4) which is concentric with the support shaft (2). The thrust plate (3) is secured to an end surface of the radial cylindrical member (4). The support shaft (2) extends through the centers of the radial cylindrical member (4) and the thrust plate (3). The rotor (7) has a radial sleeve. The radial hydrodynamic bearing is formed from the inner peripheral surface of the radial sleeve (6) and the outer peripheral surface of the radial cylindrical member (4), which face each other and either of which is formed with herringbone-shaped grooves (C1) for generating dynamic pressure. The thrust hydro­dynamic bearing is formed from an end surface of the radial sleeve (6) and a sliding surface of the thrust plate (3), which face each other and either of which is formed with spiral grooves (C1) for generating dynamic pressure. A rolling beading (24) may be added in order to minimize the starting torque in the bearing structure.

    Spindle motor
    8.
    发明公开
    Spindle motor 失效
    Spindelmotor。

    公开(公告)号：EP0392500A2

    公开(公告)日：1990-10-17

    申请号：EP90106941.9

    申请日：1990-04-11

    申请人： EBARA CORPORATION

    发明人： Hisabe, Yasushi ,  Osada, Noriyuki ,  Ohtani, Toshihiro ,  Kishi, Masahiko ,  Sato, Yoshio ,  Konno, Daisuke ,  Miwa, Sachihiko ,  Kanamori, Toshiya ,  Aiyoshizawa, Shunichi ,  Kasahara, Kazuyuki ,  Hirokawa, Kazuto ,  Noda, Yumiko

    IPC分类号： G11B19/20 ,  H02K7/04

    CPC分类号： F16C17/107 ,  F16C25/045 ,  F16C27/063 ,  F16C27/08 ,  F16C2206/40 ,  F16C2370/12 ,  G11B19/2009 ,  H02K5/1677

    摘要： A spindle motor comprising a stator (5) including a support shaft (2) positioned on a base, a cap-shaped rotor (6) rotatably and concentrically disposed around the support shaft, thrust and radial bearings (3, 4) disposed between the stator and the rotor, a stator coil (5) secured to the stator, and a rotor magnet member (6) secured to the rotor in opposing relation to the stator coil. The thrust and radial bearings are hydrodynamic bearings. A movable piece that constitutes a part of the thrust bearing is secured to the lower end of a cylindrical portion of the rotor and extended outwardly or inwardly from the cylindrical portion, or is disposed above the rotor. The stator coil (5) is secured to the outer periph­eral portion of the support shaft above or below the radial bearing. The rotor magnet member (6) is secured to the inner peripheral surface or ceiling of the rotor. Either a radial or axial gap is provided between the stator coil and the rotor magnet member.

    摘要翻译： 一种主轴电动机，包括定子（5），定子（5）包括位于基座上的支撑轴（2），围绕所述支撑轴可旋转和同心地设置的盖形转子（6），设置在所述支架轴之间的推力和径向轴承（3,4） 定子和转子，固定到定子的定子线圈（5）和与定子线圈相对的固定到转子的转子磁体构件（6）。 推力和径向轴承是流体动力轴承。 构成推力轴承的一部分的可动件固定在转子的圆筒部的下端，从圆筒部向外侧或内侧延伸，或者设置在转子的上方。 定子线圈（5）在径向轴承的上方或下方固定在支撑轴的外周部分上。 转子磁铁部件（6）固定在转子的内周面或天花板上。 在定子线圈和转子磁体构件之间设置径向或轴向间隙。