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    Drum motor for VCR
    2.
    发明授权
    Drum motor for VCR 失效
    用于录像机的鼓电机

    公开(公告)号：US5471104A

    公开(公告)日：1995-11-28

    申请号：US109706

    申请日：1993-08-19

    申请人： Manabu Toshimitsu ,  Shunichi Aiyoshizawa ,  Yoshikazu Suganuma ,  Daisuke Konno

    发明人： Manabu Toshimitsu ,  Shunichi Aiyoshizawa ,  Yoshikazu Suganuma ,  Daisuke Konno

    IPC分类号： G11B5/52 ,  F16C17/10 ,  F16C33/04 ,  F16C33/10 ,  G11B5/53 ,  H02K5/16 ,  H02K7/09 ,  H02K7/14 ,  H02K7/08

    CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/043 ,  G11B5/53 ,  H02K5/1675 ,  H02K7/09

    摘要： A drum motor for a VCR includes radial and thrust hydrodynamic bearings that are composed of a rotor-side bearing member formed by bringing a pair of first and second thrust plates into direct contact with both end surfaces of a radial bearing element and integrating them into one unit, and a stator-side bearing member in the form of a radial sleeve the inner peripheral surface and both end surfaces of which respectively cooperate with the outer peripheral surface of the radial bearing element and the mutually facing surfaces of the first and second thrust plates. A rotor magnet is secured to a rotating shaft. A motor casing is secured to the outer peripheral surface of the radial sleeve. A stator unit is secured to the motor casing. A dynamic pressure generating groove is provided on either each end surface of the radial sleeve or each of the mutually facing surfaces of the first and second thrust plates. The run-out of a rotor-side unit in both the thrust and radial directions is made extremely small and the change in the relative height of the rotor-side unit in the thrust direction due to a change of the position of the motor in which it is used is minimized.

    摘要翻译： 用于VCR的鼓式电动机包括径向和推力流体动力轴承，其由转子侧轴承构件组成，转子侧轴承构件通过使一对第一和第二推力板与径向轴承元件的两个端面直接接触而形成，并将它们集成为一个 单元以及径向套筒形式的定子侧轴承构件，其内周面和两端面分别与径向轴承元件的外周面和第一和第二止推板的相互面对的表面配合 。 转子磁体固定在旋转轴上。 马达壳体固定在径向套筒的外周表面上。 定子单元固定在电动机壳体上。 在径向套管的每个端表面或第一和第二推力板的相互面对的表面中的每一个上提供动态压力产生槽。 转子侧单元在推力和径向方向上的跳动都非常小，并且由于电动机的位置的变化，转子侧单元在推力方向上的相对高度的变化，其中 它被使用最小化。

    Hydrodynamic bearing
    3.
    发明授权
    Hydrodynamic bearing 失效
    流体动力轴承

    公开(公告)号：US5366298A

    公开(公告)日：1994-11-22

    申请号：US160189

    申请日：1993-12-02

    申请人： Manabu Toshimitsu ,  Hiroko Fuse

    发明人： Manabu Toshimitsu ,  Hiroko Fuse

    IPC分类号： F16C17/10 ,  F16C33/10 ,  F16C33/16 ,  F16C33/24 ,  F16C32/06

    CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/16

    摘要： A hydrodynamic bearing includes first and second thrust plates held against respective axially opposite ends of a cylindrical radial bearing member, and a cylindrical radial sleeve provided concentrically with the cylindrical radial bearing. The outer circumferential surface of the cylindrical radial bearing member and the inner circumferential surface of the cylindrical radial sleeve serve as sliding surfaces jointly making up a radial hydrodynamic bearing assembly, and the confronting surfaces of the first and second thrust plates and the end surfaces of the cylindrical radial sleeve serve as sliding surfaces jointly making up a thrust hydrodynamic bearing assembly. At least one of the sliding surfaces of the thrust hydrodynamic bearing assembly has grooves formed therein for generating a hydrodynamic pressure. At least one of the sliding surfaces of the radial hydrodynamic bearing assembly is coated with a uniform hydrogenated amorphous carbon film. At least one of the sliding surfaces of the thrust hydrodynamic bearing assembly is coated with a uniform hydrogenated amorphous carbon film.

    摘要翻译： 流体动力轴承包括保持在圆柱形径向轴承构件的相应轴向相对端的第一和第二推力板，以及与圆柱形径向轴承同心设置的圆柱形径向套筒。 圆筒形径向轴承部件的外圆周表面和圆柱形径向套筒的内圆周表面用作共同构成径向流体动压轴承组件的滑动表面，并且第一和第二推力板的面对面和 圆柱形径向套筒作为滑动表面共同构成推力流体动力轴承组件。 推力流体动力轴承组件的至少一个滑动表面具有形成在其中的槽，用于产生流体动力学压力。 径向流体动力轴承组件的至少一个滑动表面涂覆有均匀的氢化无定形碳膜。 推力流体动力轴承组件的至少一个滑动表面涂覆有均匀的氢化无定形碳膜。

    Single-phase brushless motor with multisector stator armature poles having different cross-sections
    4.
    发明授权
    Single-phase brushless motor with multisector stator armature poles having different cross-sections 失效
    具有多段定子电枢极的单相无刷电机具有不同的横截面

    公开(公告)号：US4583015A

    公开(公告)日：1986-04-15

    申请号：US630803

    申请日：1984-07-13

    申请人： Manabu Toshimitsu

    发明人： Manabu Toshimitsu

    IPC分类号： H02K29/08 ,  H02K17/10

    CPC分类号： H02K29/08

    摘要： A single-phase brushless motor which can be manufactured at low cost and which can be started at any rotary position. The motor includes a rotary magnet having a plurality of magnetic poles and a stator armature having a plurality of poles, each of which is wound with a coil carrying a driving current. Each of the poles is divided circumferentially into at least two sectors, the cross sections of which at points where the magnetic flux density is a maximum being different from one another. A single position detector detects the rotary position of the rotary magnet relative to the stator armature, and the driving currents in each of the coils are controlled in accordance with the output of the position detector. In preferred embodiments, the poles have links which join them to a generally cylindrical central core. Holes are formed in at least some of the sectors of each of the poles, having different diameters.

    摘要翻译： 一种单相无刷电机，可以低成本制造，可以在任何旋转位置启动。 电动机包括具有多个磁极的旋转磁体和具有多个磁极的定子电枢，每个磁极缠绕有承载驱动电流的线圈。 每个极被圆周地分成至少两个扇区，其中磁通密度最大的点彼此之间的横截面在其中。 单个位置检测器检测旋转磁体相对于定子电枢的旋转位置，并且根据位置检测器的输出来控制每个线圈中的驱动电流。 在优选实施例中，极具有将它们连接到大致圆柱形的中心芯的链节。 在每个极的至少一些扇区中形成有不同直径的孔。