公开(公告)号：US20100052447A1

公开(公告)日：2010-03-04

申请号：US12548855

申请日：2009-08-27

申请人： Yosuke KADOYA ,  Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

发明人： Yosuke KADOYA ,  Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

IPC分类号： H02K5/167 ,  F16C32/06

摘要： The hydrodynamic bearing device has a sleeve composed of a sintered material and having a compression-absorbing space inside the sleeve, the sleeve having a bearing hole in the center thereof; a shaft rotatably inserted into the bearing hole; a bearing portion formed between the bearing hole and the shaft; a hydrodynamic groove formed on at least one of the internal peripheral surface of the bearing hole and the external peripheral surface of the shaft; a concavity having one or more steps and formed to one end of the sleeve in the axial direction; a convexity formed to the other end of the sleeve in the axial direction, the convexity having a shape similar to the concavity; and a lubricating fluid filled in the gap of the bearing portion. The hydrodynamic bearing device has a readily obtainable predetermined shape precision, the internal density of the sintered material is made uniform, and lubricating fluid therein does not leak from the surface.

摘要翻译： 流体动力轴承装置具有由烧结材料构成的套筒，在套筒内部具有压缩吸收空间，套筒的中心具有轴承孔; 可旋转地插入到所述轴承孔中的轴; 形成在所述轴承孔和所述轴之间的轴承部; 形成在所述轴承孔的内周面和所述轴的外周面的至少一个上的流体动力槽; 具有一个或多个台阶并且沿轴向方向形成在套筒的一端的凹面; 在轴向方向上形成于套筒另一端的凸部，凸部具有与凹部相似的形状; 以及填充在轴承部分的间隙中的润滑流体。 流体动力轴承装置具有容易获得的预定形状精度，烧结材料的内部密度均匀，并且其中的润滑流体不会从表面泄漏。

公开(公告)号：US20070092171A1

公开(公告)日：2007-04-26

申请号：US11521362

申请日：2006-09-15

申请人： Takafumi Asada ,  Tsutomu Hamada ,  Masato Morimoto ,  Katsuo Ishikawa

发明人： Takafumi Asada ,  Tsutomu Hamada ,  Masato Morimoto ,  Katsuo Ishikawa

IPC分类号： F16C32/06

摘要： A hydrodynamic bearing having a high performance and a long life and a manufacturing method for the same are provided by forming hydrodynamic grooves to have a sufficient depth with a high accuracy, and sealing remaining pores on a bearing surface. A shaft is inserted into a bearing hole of a sleeve so as to be relatively rotatable. The bearing hole has a bearing surface having hydrodynamic grooves. The sleeve is formed by: forming metal powder to have a hollow cylindrical shape, sintering the metal powder; inserting a core rod in a pattern having a tapered surface into a bore of the sintered metal material; forming an inner surface having hydrodynamic grooves by pressing the sintered metal material from upper, lower and outer peripheral direction; inserting a core rod having a wide diameter portion and a narrow diameter portion into the bore of the sintered metal material to form the bearing bore surface of a hydrodynamic groove with the small diameter portion and to form the sleeve inner surface with the wide diameter portion at the same time; and removing the core rod from bore of the sintered metal material to have the inner periphery formed as such as the bearing inner surface and a large diameter portion as a lubricating fluid reservoir. Thus, grooves can be processed with a high accuracy.

摘要翻译： 具有高性能和长寿命的流体动力轴承及其制造方法通过以高精度形成流体动力槽以具有足够的深度并且在轴承表面上密封剩余的孔来提供。 将轴插入到套筒的轴承孔中以相对旋转。 轴承孔具有具有流体动力槽的支承表面。 该套筒通过以下方式形成：将金属粉末形成为具有中空圆柱形状，烧结金属粉末; 将具有锥形表面的图案的芯棒插入所述烧结金属材料的孔中; 通过从上，下和外周向压制烧结金属材料形成具有流体动力槽的内表面; 将具有宽直径部分和窄直径部分的芯棒插入烧结金属材料的孔中以形成具有小直径部分的流体动力槽的轴承孔表面，并且形成具有宽直径部分的套筒内表面 同一时间; 并且将所述芯棒从所述烧结金属材料的孔中移除以使得所述内周形成为所述轴承内表面，并且所述大直径部分形成为润滑油储存器。 因此，可以高精度地加工凹槽。

公开(公告)号：US20070086686A1

公开(公告)日：2007-04-19

申请号：US11443014

申请日：2006-05-31

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： F16C32/06

CPC分类号： F16C33/103 ,  F16C17/026 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12 ,  H02K7/085 ,  H02K7/086

摘要： To generate the desired dynamic pressure with an inexpensive structure. A hydrodynamic bearing device comprises a sleeve 1, a shaft 2, and oil 100. With the sleeve 1, a stepped portion 1b provided at one end and an inner peripheral face 1e extending linearly in the axial direction and continuously with the stepped portion 1b are formed by a working method that involves the use of a metal mold. The shaft 2 is inserted so as to be capable of relative rotation in the inner peripheral face 1e of the sleeve 1. The oil 100 fills the space formed between the inner peripheral face 1e of the sleeve 1 and the outer peripheral face 2a of the shaft 2. Dynamic pressure generation grooves 9a and 9b, which open in the axial direction at at least one end in the axial direction of the inner peripheral face 1e and are continuous in the axial direction from one end, are formed in the inner peripheral face 1e.

摘要翻译： 以廉价的结构产生所需的动态压力。 流体动力轴承装置包括套筒1，轴2和油100。 利用套筒1，通过使用金属模具的工作方法，形成设置在一端的阶梯部分1b和沿轴向线性延伸并与台阶部分1b连续的内周面1e。 轴2被插入以能够在套筒1的内周面1e中相对旋转。 油100填充形成在套筒1的内周面1e和轴2的外周面2a之间的空间。 在内周面1e的轴向的至少一端沿轴向开口且从一端沿轴向连续的动压发生槽9a和9b形成在内周面 1 e。

公开(公告)号：US20060158060A1

公开(公告)日：2006-07-20

申请号：US11315310

申请日：2005-12-23

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： H02K1/22

CPC分类号： H02K5/1675 ,  H02K1/02 ,  H02K1/146 ,  H02K5/00

摘要： A spindle motor including a rotor hub which is rotationally driven by a magnetic action of a rotational magnetic field generated when a current is applied to a wire wound around teeth of a stator core and a magnetic field of a magnet provided on a rotor. Herein, the stator core formed by laminating magnetic steel plates is mounted to an outer periphery of a supporting part of a rotation support shaft of the rotor hub, and the supporting part is made of sintered metal containing a ferromagnetic material. This spindle motor can suppress generation of vibration and noise even when it is reduced in size.

公开(公告)号：US07541708B2

公开(公告)日：2009-06-02

申请号：US11315310

申请日：2005-12-23

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： H02K7/08

CPC分类号： H02K5/1675 ,  H02K1/02 ,  H02K1/146 ,  H02K5/00

摘要： A spindle motor including a rotor hub which is rotationally driven by a magnetic action of a rotational magnetic field generated when a current is applied to a wire wound around teeth of a stator core and a magnetic field of a magnet provided on a rotor. Herein, the stator core formed by laminating magnetic steel plates is mounted to an outer periphery of a supporting part of a rotation support shaft of the rotor hub, and the supporting part is made of sintered metal containing a ferromagnetic material. This spindle motor can suppress generation of vibration and noise even when it is reduced in size.

公开(公告)号：US07625123B2

公开(公告)日：2009-12-01

申请号：US11443014

申请日：2006-05-31

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： F16C32/06 ,  F16C17/10

CPC分类号： F16C33/103 ,  F16C17/026 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12 ,  H02K7/085 ,  H02K7/086

摘要： A hydrodynamic bearing device including a sleeve (1), a shaft (2), and oil (100). With respect to the sleeve (1), a stepped portion (1b) provided at one end and an inner peripheral face (1e) extending linearly in the axial direction and continuously with the stepped portion (1b) are formed by a working method that involves the use of a metal mold. The shaft (2) is inserted so as to be capable of relative rotation with respect to the inner peripheral face (1e) of the sleeve (1). The oil fills the space formed between the inner peripheral face of the sleeve and the outer peripheral face of the shaft. Dynamic pressure generation grooves (9a and 9b), which open in the axial direction at at least one end in the axial direction of the inner peripheral face (1e) and are continuous in the axial direction from one end, are formed in the inner peripheral face.

摘要翻译： 一种流体动力轴承装置，包括套筒（1），轴（2）和油（100）。 相对于套筒（1），设置在一端的台阶部分（1b）和沿轴向线性延伸并与台阶部分（1b）连续延伸的内周面（1e）通过一种工作方法形成，该方法涉及 使用金属模具。 轴（2）被插入以能够相对于套筒（1）的内周面（1e）相对旋转。 油填充在套筒的内周面和轴的外周面之间形成的空间。 在内周面（1e）的轴向的至少一端沿轴向开口并从一端沿轴向连续的动压发生槽（9a，9b）形成在内周 面对。

公开(公告)号：US20090152968A1

公开(公告)日：2009-06-18

申请号：US12320256

申请日：2009-01-22

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： H02K5/167

CPC分类号： H02K5/1675 ,  H02K1/02 ,  H02K1/146 ,  H02K5/00

摘要： A spindle motor including a rotor hub which is rotationally driven by a magnetic action of a rotational magnetic field generated when a current is applied to a wire wound around teeth of a stator core and a magnetic field of a magnet provided on a rotor. Herein, the stator core formed by laminating magnetic steel plates is mounted to an outer periphery of a supporting part of a rotation support shaft of the rotor hub, and the supporting part is made of sintered metal containing a ferromagnetic material. This spindle motor can suppress generation of vibration and noise even when it is reduced in size.

摘要翻译： 一种主轴电动机，其包括转子毂，所述转子毂由当电流施加到缠绕在定子芯的齿上的线和设置在转子上的磁体的磁场时产生的旋转磁场的磁作用旋转驱动。 这里，通过层叠电磁钢板形成的定子铁心安装在转子轮毂的旋转支撑轴的支撑部的外周，支撑部由含铁磁材料的烧结金属制成。 即使减小了主轴电机，也能够抑制振动和噪音的产生。

公开(公告)号：US20090073596A1

公开(公告)日：2009-03-19

申请号：US12169474

申请日：2008-07-08

申请人： Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

发明人： Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

IPC分类号： G11B5/02 ,  F16C17/10 ,  H02K15/14

摘要： A hydrodynamic bearing device comprises a sleeve composed of a sintered member, a shaft that is inserted in a state of being capable of relative rotation into a bearing hole provided to the sleeve, and a hydrodynamic groove formed in the outer peripheral surface of the shaft and/or the inner peripheral surface of the sleeve. The sleeve has a surface porosity of 1.5% or less, and the ridge width is at least 0.10 mm.

摘要翻译： 流体动力轴承装置包括由烧结构件构成的套筒，以能够相对旋转到设置于套筒的轴承孔的状态插入的轴和形成在轴的外周面中的流体动力槽， /或套筒的内周面。 套筒的表面孔隙率为1.5％以下，脊宽度为0.10mm以上。

公开(公告)号：US20070047857A1

公开(公告)日：2007-03-01

申请号：US11509770

申请日：2006-08-25

申请人： Tsutomu Hamada ,  Takafumi Asada ,  Katsuo Ishikawa

发明人： Tsutomu Hamada ,  Takafumi Asada ,  Katsuo Ishikawa

IPC分类号： F16C33/02 ,  F16C32/06

CPC分类号： F16C33/14 ,  F16C17/107 ,  F16C2220/20 ,  F16C2220/60 ,  F16C2223/04 ,  F16C2223/08 ,  F16C2370/12

摘要： A bearing stiffness of a sintered metal sleeve is prevented from lowering. A sleeve includes an inner section formed of metal powder for sintering and a resin for impregnation, and a surface deformation section which covers a surface of the inner section and is formed by shot blast process. Since the surface deformation section is formed by the shot blast process, the number of pores formed between the metal powder for sintering near the surface can be reduced. In this way, a supporting pressure at a bearing portion can be prevented from being released out through the pores, and the bearing stiffness can be prevented from lowering.

摘要翻译： 防止烧结金属套筒的轴承刚度降低。 套筒包括由用于烧结的金属粉末形成的内部部分和用于浸渍的树脂，以及覆盖内部部分的表面并通过喷丸处理形成的表面变形部分。 由于通过喷丸法形成表面变形部，因此可以减少在表面附近烧结用金属粉末之间形成的细孔数。 以这种方式，可以防止轴承部分处的支撑压力通过孔排出，并且可以防止轴承刚度的降低。

公开(公告)号：USD580096S1

公开(公告)日：2008-11-04

申请号：US29292400

申请日：2007-10-11

申请人： Akitoshi Hara ,  Katsuo Ishikawa ,  Yukihiro Tonegawa

设计人： Akitoshi Hara ,  Katsuo Ishikawa ,  Yukihiro Tonegawa