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1. 发明授权

US06822358B2 Spindle motor and manufacture thereof 失效
标题翻译：主轴电动机及其制造
公开(公告)号：US06822358B2
公开(公告)日：2004-11-23
申请号：US10244457
申请日：2002-09-17
申请人： Tsutomu Nozaki , Tadayoshi Yano , Toshikazu Takehana , Hidekazu Tokushima , Yuji Yoshitomi
发明人： Tsutomu Nozaki , Tadayoshi Yano , Toshikazu Takehana , Hidekazu Tokushima , Yuji Yoshitomi
IPC分类号： H02K708
CPC分类号： F16C17/04 , F16C33/08 , F16C33/1035 , F16C43/02 , F16C2370/12 , G11B19/2009 , H02K5/1675
摘要： A spindle motor having a bearing housing and a thrust bearing fitted in the bearing housing at the lower end of the latter, in which an inclined part is formed on the outer peripheral edge at the lower end of the thrust bearing, and the outer diameter part of the thrust bearing is fitted in a coupling bore formed in the end surface of the bearing housing, the end surface of the bearing housing being pressed uniformly in the axial direction over the entire circumference around the coupling bore to cause the bearing housing to plastically flow around the coupling bore in order to cover the above-mentioned inclined part of the thrust bearing. The above-mentioned covering part formed in the bearing housing through plastic flow can exhibit a high bonding strength between the bearing housing and the thrust bearing in the spindle motor without deteriorating the sealing ability of the spindle motor, due to a shearing force and a residual contact pressure of the covering part.
摘要翻译：一种主轴电动机，其具有轴承壳体和推力轴承，所述推力轴承装配在所述轴承壳体的下端，所述推力轴承在所述止推轴承的下端的外周边缘上形成有倾斜部，所述外径部止推轴承装配在形成在轴承箱端面上的连接孔中，轴承壳体的端面沿轴向均匀地压在连接孔周围的整个圆周上，使轴承壳体塑性流动围绕联接孔以覆盖推力轴承的上述倾斜部分。通过塑料流动形成在轴承壳体中的上述覆盖部分可以在轴承壳体和主轴电机中的推力轴承之间表现出高的结合强度，而不会由于剪切力和残余物而降低主轴电机的密封能力覆盖部分的接触压力。

2. 发明授权

US06756715B2 Spindle motor 失效
标题翻译：主轴电机
公开(公告)号：US06756715B2
公开(公告)日：2004-06-29
申请号：US10360000
申请日：2003-02-06
申请人： Jun Hirose , Katsutoshi Nii , Tadayoshi Yano , Toshikazu Takehana , Hidekazu Tokushima
发明人： Jun Hirose , Katsutoshi Nii , Tadayoshi Yano , Toshikazu Takehana , Hidekazu Tokushima
IPC分类号： H02K512
CPC分类号： F16C17/028 , F16C17/107 , F16C17/26 , F16C2370/12 , G11B19/2009 , H02K5/1675
摘要： A spindle motor comprises a housing 10 including a through hole with a pair of apertures, one of the apertures being closed by a thrust plate 70 and the other aperture being open; a bearing 60 accommodated in the housing 90; a rotating shaft 30 inserted into the bearing 60; a displacement restraining structure for restraining movement of the rotating shaft 30 toward the open aperture by engaging the rotation shaft 30 with the bearing 60; a rotating member secured to the rotating shaft; and a motor generating electromagnetic function for rotating the rotating member. The through hole of the housing 90 includes a large diameter portion 92A at the thrust plate 70 side and a small diameter portion 92B at the open aperture side, and a stepped portion 93 is formed at a transition portion between the large diameter portion 92A and the small diameter portion 92B. At least a portion of the bearing 60 is located at the large diameter portion 92A side of the housing 90, and engages with the stepped portion 93 of the housing 90.
摘要翻译：主轴电动机包括壳体10，壳体10包括具有一对孔的通孔，其中一个孔由止推板70封闭，另一个孔打开; 容纳在壳体90中的轴承60; 插入到轴承60中的旋转轴30; 用于通过使旋转轴30与轴承60接合来限制旋转轴30朝向开口的运动的位移限制结构; 固定在旋转轴上的旋转构件; 以及用于旋转旋转构件的产生电磁功能的电动机。壳体90的通孔包括在推力板70侧的大直径部分92A和在开口侧的小直径部分92B，并且台阶部分93形成在大直径部分92A和小径部92B。轴承60的至少一部分位于壳体90的大直径部分92A侧，并与壳体90的阶梯部分93接合。

3. 发明授权

US06851859B2 Bearing unit, production method therefor and spindle motor 失效
标题翻译：轴承单元及其生产方法和主轴电机
公开(公告)号：US06851859B2
公开(公告)日：2005-02-08
申请号：US10360408
申请日：2003-02-06
申请人： Toshikazu Takehana , Hidekazu Tokushima , Hideo Shikata , Katsutoshi Nii , Jun Hirose
发明人： Toshikazu Takehana , Hidekazu Tokushima , Hideo Shikata , Katsutoshi Nii , Jun Hirose
IPC分类号： F16C17/10 , F16C33/10 , F16C33/14 , F16C33/20 , F16C35/02 , H02K7/08 , H02K15/14 , F16C32/06 , B23P15/00
CPC分类号： F16C33/1035 , F16C17/026 , F16C33/107 , Y10T29/49639
摘要： A bearing unit comprises a bearing 60 formed of a sintered metal in which a magnetized magnetic powder is dispersed in its matrix and at least pores exposed on a bearing surface thereof are sealed by impregnation with a resin; a non-magnetic housing 90 accommodating the bearing 60; and a lubricating fluid M made of a magnetic fluid.
摘要翻译：轴承单元包括由烧结金属形成的轴承60，其中磁化的磁性粉末分散在其基体中，并且至少暴露在其轴承表面上的孔通过用树脂浸渍而被密封; 容纳轴承60的非磁性壳体90; 以及由磁性流体制成的润滑液M。

4. 发明授权

US06737016B2 Process for manufacturing sintered slide bearing 失效
标题翻译：制造烧结滑动轴承的工艺
公开(公告)号：US06737016B2
公开(公告)日：2004-05-18
申请号：US10141905
申请日：2002-05-08
申请人： Hideo Shikata , Hidekazu Tokushima , Tadayoshi Yano
发明人： Hideo Shikata , Hidekazu Tokushima , Tadayoshi Yano
IPC分类号： B22F326
CPC分类号： C22C32/0094 , B22F3/26 , B22F2003/166 , B22F2998/10 , F16C33/121 , B22F3/02 , B22F3/10
摘要： Disclosed is a process for manufacturing a sintered slide bearing. A sintered porous bearing body is prepared from a powdered metal material and a resin material in a fluidable state is penetrated into the sintered porous bearing body. The resin material in the sintered porous bearing body is hardened, and the sintered porous bearing body after the hardening of the resin material is repressed to reduce a gap produced between the sintered porous bearing body and the hardened resin material by volume reduction caused on the resin material at the hardening.
摘要翻译：公开了一种制造烧结滑动轴承的方法。烧结的多孔轴承体由粉末金属材料制成，可流动状态的树脂材料穿透到烧结的多孔轴承体中。烧结的多孔轴承体中的树脂材料被硬化，并且在树脂材料硬化之后的烧结多孔轴承体被抑制，以通过在树脂上引起的体积减小来减少烧结的多孔轴承体和硬化的树脂材料之间产生的间隙材料在硬化。

5. 发明申请

US20080010832A1 Production method for sintered fluid dynamic pressure bearing 审中-公开
标题翻译：烧结流体动压轴承的生产方法
公开(公告)号：US20080010832A1
公开(公告)日：2008-01-17
申请号：US11711028
申请日：2007-02-27
申请人： Hidekazu Tokushima , Takahiro Jinushi , Katsutoshi Nii , Zenzo Ishijima
发明人： Hidekazu Tokushima , Takahiro Jinushi , Katsutoshi Nii , Zenzo Ishijima
IPC分类号： B21K1/10
CPC分类号： F16C33/10 , B22F3/26 , B22F2998/00 , B22F2998/10 , B22F2999/00 , C22C1/0425 , F16C33/20 , F16C33/201 , F16C33/208 , Y10T29/49639 , B22F1/0003 , B22F1/0055 , B22F3/02 , B22F3/1007 , B22F3/16 , B22F2201/016 , B22F3/164 , B22F3/162
摘要： A sintered fluid dynamic pressure bearing completely seals or decreases the sizes of gaps formed in pores by shrinkage when a resin impregnated therein shrinks. The fluid dynamic pressure bearings can be reliably and easily produced using fewer processes while superior quality is maintained. A production method for a fluid dynamic pressure bearing includes a resin sealing process including a resin impregnating step in which a monomer of an anaerobic resin composed primarily of acrylate or methacrylate is impregnated in pores of a porous sintered compact, an excess resin washing off step in which excess resin adhering to the surface of the porous sintered compact is washed off, and a resin curing step in which the monomer of the anaerobic resin impregnated in the pores is cured by heating the porous sintered compact to at least the curing temperature of the resin after washing off the excess resin; the resin sealing process is repeatedly carried out, and a monomer of an anaerobic resin containing an organic peroxide at 0.1 to 1.0 mass % is used in at least the resin impregnating step of the last resin sealing process.
摘要翻译：当浸渍在其中的树脂收缩时，烧结流体动压轴承通过收缩完全密封或减小在孔中形成的间隙的尺寸。流体动压轴承可以使用更少的工艺可靠且容易地制造，同时保持优良的质量。流体动压轴承的制造方法包括：树脂密封方法，其包括树脂浸渍步骤，其中主要由丙烯酸酯或甲基丙烯酸酯组成的厌氧性树脂的单体浸渍在多孔烧结体的孔中，多余的树脂洗涤步骤洗涤多孔烧结体表面附着的多余的树脂，并且通过将多孔烧结体加热至至少树脂的固化温度来固化浸渍在孔中的厌氧性树脂的单体的树脂固化步骤洗掉多余的树脂后; 重复进行树脂密封处理，至少在最后一次树脂密封工序的树脂浸渍工序中使用含有0.1〜1.0质量％的有机过氧化物的厌氧性树脂的单体。

6. 发明授权

US5821655A Magnetic fluid bearing unit structure and motor having the same 失效
标题翻译：磁流体轴承单元结构和电动机相同
公开(公告)号：US5821655A
公开(公告)日：1998-10-13
申请号：US786964
申请日：1997-01-24
申请人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
发明人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
IPC分类号： F16C17/10 , F16C32/04 , F16C33/10 , H02K5/16 , H02K5/167 , F16C32/06
CPC分类号： F16C17/10 , F16C33/1035 , H02K5/1677
摘要： A magnetic fluid bearing unit has a bearing housing, a bearing member having magnetic fluid as a lubricating agent, a rotary body rotatively supported by the bearing member, an upper permanent magnet arranged inside the bearing housing, and a lower permanent magnet arranged inside the bearing housing, the bearing member being sandwiched by the upper permanent magnet and the lower permanent magnet. The bearing member is a radial porous oil-containing bearing member in which the magnetic fluid is impregnated. The upper permanent magnet is set to have one direction of magnetic pole orientation, and the lower permanent magnet is set to have the same direction of magnetic pole orientation as the upper permanent magnet. The bearing member is sandwiched by the upper permanent magnet and the lower permanent magnet to confine the magnetic fluid. Over a wide range of rotation speeds, the leakage and the scattering of the magnetic fluid from the bearing unit can be prevented. The bearing unit for a compact size motor having a high rotation accuracy can be obtained.
摘要翻译：磁性流体轴承单元具有轴承壳体，具有作为润滑剂的磁性流体的轴承构件，由轴承构件可旋转地支撑的旋转体，布置在轴承壳体内部的上部永磁体和布置在轴承内部的下部永磁体壳体，轴承构件被上永磁体和下永磁体夹持。轴承构件是其中浸渍有磁性流体的径向多孔含油轴承构件。上永磁体被设定为具有一个方向的磁极取向，并且下永磁体被设置为具有与上永磁体相同的磁极方位方向。轴承构件被上永磁体和下永磁体夹持以限制磁流体。在很宽的旋转速度范围内，可以防止来自轴承单元的磁性流体的泄漏和散射。可以获得具有高旋转精度的紧凑型电动机的轴承单元。

7. 发明授权

US5834870A Oil impregnated porous bearing units and motors provided with same 失效
标题翻译：油浸多孔轴承单元和电动机
公开(公告)号：US5834870A
公开(公告)日：1998-11-10
申请号：US858347
申请日：1997-05-19
申请人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
发明人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
IPC分类号： F16C33/10 , H02K5/167 , H02K7/08 , H02K5/16
CPC分类号： F16C33/1075 , F16C33/1035 , F16C33/104 , H02K7/085 , H02K7/09
摘要： An oil impregnated porous bearing unit includes an arrangement wherein an oil impregnated porous bearing containing ferro-fluid is fixed in a non-magnetizable housing, a ring shaped permanent magnet is disposed so that the ferro-fluid will exist in a gap between a rotary shaft, whereon the ring shaped permanent magnet is fixed, and the oil impregnated porous bearing, and the ferro-fluid circulates between a slide plane of the bearing and a body of the oil impregnated porous bearing with rotation of the rotary shaft by utilizing the magnetic attractive force of the permanent magnet and a capillary phenomenon in the oil impregnated porous bearing. In addition, a spiral groove may be provided in an exterior circumferential surface of the permanent magnet fixed to the rotary shaft or in an interior circumferential surface of the housing facing the above exterior circumferential surface of the permanent magnet in order to generate dynamic pressure at the spiral groove portion with rotation of the rotary shaft so as to supply ferro-fluid to the oil impregnated porous bearing.
摘要翻译：含油多孔轴承单元包括其中含有铁水流体的含油多孔轴承固定在不可磁化壳体中的布置，环形永磁体被设置成使得铁流体将存在于旋转轴固定环形永磁体，并且油浸多孔轴承和铁液在轴承的滑动平面与具有旋转轴旋转的浸油多孔轴承体之间通过利用磁吸引力循环永磁体的力和油浸多孔轴承中的毛细管现象。此外，螺旋槽可以设置在固定到旋转轴的永磁体的外周面中，或者在面向永磁体的上述外周面的壳体的内周面中，以在该永磁体的外周面中产生动态压力旋转轴旋转的螺旋槽部分，以便向浸油的多孔轴承提供铁流体。

8. 发明授权

US5645355A Bearing unit 失效
标题翻译：轴承单元
公开(公告)号：US5645355A
公开(公告)日：1997-07-08
申请号：US656912
申请日：1996-06-03
申请人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
发明人： Hidekazu Tokushima , Motohiro Miyasaka , Michihiro Aizawa , Hideo Shikata , Katsutoshi Nii
IPC分类号： F16C33/10 , F16C17/02
CPC分类号： F16C33/10 , F16C33/1035 , F16C33/104 , Y10S384/902
摘要： A bearing unit in which two oil sintered slide bearings are fitted in a bearing space of non-magnetic bearing housings to be spaced away from each other and a magnetic fluid is interposed between a rotary shaft and the oil sintered slide bearings to rotatably support the rotary shaft. The rotary shaft is made from a material having permeability, and a ring-shaped permanent magnet is fixedly provided between the two oil sintered slide bearings to be spaced therefrom. The magnetic fluid is held between the two oil sintered slide bearings to be circulated.
摘要翻译：一种轴承单元，其中两个油烧结滑动轴承安装在非磁性轴承座的轴承空间中以彼此间隔开，并且磁性流体介于旋转轴和油烧结滑动轴承之间以可旋转地支撑旋转轴。旋转轴由具有渗透性的材料制成，并且环状永磁体固定地设置在两个油烧结滑动轴承之间以与其间隔开。磁性流体保持在两个待循环的油烧结滑动轴承之间。

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