公开(公告)号：US20080095480A1

公开(公告)日：2008-04-24

申请号：US11666742

申请日：2005-11-29

申请人： Rikuro Obara ,  Tadashi Akahori

发明人： Rikuro Obara ,  Tadashi Akahori

IPC分类号： F16C32/06 ,  G11B3/60

CPC分类号： F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12 ,  G11B19/2036

摘要： A fluid dynamic pressure bearing device includes a shaft member (5) and a bearing member (41), at least one of the shaft member or the bearing member being rotatable with respect to the other A shaft member-side annular member (13) is fixed with respect to the shaft member. The shaft member-side annular member includes a large-diameter rim portion and a small-diameter outer circumferential surface portion. A bearing member-side annular member (14) is fixed with respect to the bearing member. The bearing member-side annular member includes an inner circumferential large-diameter step portion, and a small-diameter inner circumferential surface portion. A plurality of convex surface portions are formed either on a surface of the inner circumferential large-diameter step portion facing the large-diameter rim portion of the shaft member-side annular member, or on a surface of the large-diameter rim portion of the shaft member-side annular member facing a surface of the inner circumferential large-diameter step portion. A reflux groove (17) surrounds the convex surface portions.

摘要翻译： 流体动压轴承装置包括轴构件（5）和轴承构件（41），所述轴构件或轴承构件中的至少一个可相对于另一个A轴构件侧环形构件（13）旋转， 相对于轴件固定。 轴构件侧环状构件包括大直径边缘部和小直径外周面部。 轴承构件侧环形构件（14）相对于轴承构件固定。 轴承构件侧环形构件包括内周大直径台阶部和小直径内周面部。 在内周大直径台阶部的与轴构件侧环状构件的大直径边缘部分相对的表面上，或者形成在多个凸面部分的大直径边缘部分的表面上， 轴构件侧环形构件面向内周大直径台阶部的表面。 回流槽（17）围绕凸面部分。

公开(公告)号：US20070246372A1

公开(公告)日：2007-10-25

申请号：US11661869

申请日：2005-08-25

申请人： Rikuro Obara ,  Tomoyuki Yasuda

发明人： Rikuro Obara ,  Tomoyuki Yasuda

IPC分类号： B23H3/04

CPC分类号： B23H9/00 ,  B23H3/04 ,  B23H2200/10 ,  F16C17/107 ,  F16C33/107 ,  F16C33/14

摘要： An electrochemical machining tool (1) for electrochemical machining includes an electrode body (11). The electrochemical machining tool (1) and associated method can conduct simultaneous electrochemical machining of at least two of a radial dynamic pressure generating groove (43), an axial dynamic pressure generating groove (44), and a removal of a burr (42) associated with an oil pool (41). Electrochemical machining is performed with groove machining electrodes (12, 13) and deburring electrodes (14). A sleeve (4) machined using the electrochemical machining tool (1) and associated method has the radial dynamic pressure generating groove (43), the axial dynamic pressure generating groove (44), and the deburred oil pool (41). The sleeve (4) can be used in a hydrodynamic pressure bearing for use in a spindle motor of a hard disk drive.

摘要翻译： 一种用于电化学加工的电化学加工工具（1）包括电极体（11）。 电化学加工工具（1）和相关联的方法可以对径向动压产生槽（43），轴向动压产生槽（44）中的至少两个进行同时电化学加工，并且去除与之相关的毛刺（42） 有一个油池（41）。 用槽加工电极（12,13）和去毛刺电极（14）进行电化学加工。 使用电化学加工工具（1）加工的套筒（4）和相关联的方法具有径向动压产生槽（43），轴向动压产生槽（44）和脱油油池（41）。 套筒（4）可以用在用于硬盘驱动器的主轴电机中的流体动力压力轴承中。

公开(公告)号：US06990738B2

公开(公告)日：2006-01-31

申请号：US10371632

申请日：2003-02-20

申请人： Rikuro Obara

发明人： Rikuro Obara

IPC分类号： B21D53/10

CPC分类号： F16C33/7846 ,  B21K1/02 ,  B23P15/003 ,  F16C19/163 ,  Y10T29/49679 ,  Y10T29/49684 ,  Y10T29/49689 ,  Y10T29/49693

摘要： A process for manufacturing miniature ball bearings that reduces material loss to improve manufacturing efficiency. The process consists of obtaining an inner and outer ring blank by cutting a first blank, forging the first blank to obtain a final blank, and separating the final blank to form an outer ring blank and an inner ring blank. The outer ring blank has an outer diameter of at most 13 mm. Cutting the first blank is performed by press cutting.

公开(公告)号：US06582129B2

公开(公告)日：2003-06-24

申请号：US09931766

申请日：2001-08-20

申请人： Rikuro Obara

发明人： Rikuro Obara

IPC分类号： F16C3380

CPC分类号： H02K5/1737 ,  F16C19/08 ,  F16C19/18 ,  F16C19/54 ,  F16C33/7846 ,  F16C35/12 ,  F16C2370/12 ,  G11B5/4806 ,  G11B17/028 ,  G11B17/038 ,  G11B19/2009

摘要： The object of the present invention is to provide a compound bearing apparatus having arrangements for preventing the lubricant present around the rotating bodies from leaking out to the outside as well as the interior space between two rows of rotating bodies of the bearing apparatus. This is effected for the purpose of providing the compound bearing apparatus and a spindle motor and a swing arm assembly for a hard disk drive device including such bearing apparatus in which the sufficient amount of lubricant can be retained around the rotating bodies to obtain long life feature and having substantially no noise or vibration due to the loss of lubricant. The compound bearing apparatus in accordance with the present invention includes a stepped shaft 1 having enlarged diameter shaft portion 1a and reduced diameter shaft portion 1b, a sleeve outer race 2 surrounding the stepped shaft, two rows of rotating bodies 3, 4 interposed therebetween, outer sealing plates 10, 11 provided on the outer side of each rotating bodies respectively, and inner sealing plates 13, 14 provided on the inner side of each rotating bodies respectively.

摘要翻译： 本发明的目的是提供一种具有用于防止旋转体周围的润滑剂泄漏到外部以及轴承装置的两排旋转体之间的内部空间的装置的复合轴承装置。 这是为了提供复合轴承装置和主轴电动机以及用于包括这种轴承装置的硬盘驱动装置的摆臂组件的目的，其中足够量的润滑剂可以保持在旋转体周围以获得长寿命特征 并且由于润滑剂的损失而基本上没有噪声或振动。根据本发明的复合轴承装置包括具有扩大的直径轴部分1a和减小直径轴部分1b的阶梯轴1，围绕阶梯状的套筒外圈2 轴，分别设置在各旋转体的外侧的两排旋转体3,4，分别设置在各旋转体的外侧的外侧密封板10,11，以及分别设置在各旋转体的内侧的内侧密封板13,14。

公开(公告)号：US06511303B2

公开(公告)日：2003-01-28

申请号：US09893876

申请日：2001-06-29

申请人： Rikuro Obara

发明人： Rikuro Obara

IPC分类号： F04B1700

CPC分类号： F04D29/0563 ,  F04D25/0606 ,  F04D29/059

摘要： The object of the present invention is to provide a blower including a bearing structure wherein the number of components is reduced, the cost for manufacturing can be reduced, and the diameter of the shaft can be increased. The bearing structure is good at its durability, eliminates or reduces the rotational run out, and provides superior quietness. The blower of the present invention having an impeller adapter to be rotated upon energizing the blower comprising; a bearing device for supporting a rotational center portion of the impeller, the bearing device including; a sleeve, a stepped shaft including a larger diameter portion and a reduced diameter portion provided at one end thereof, the first inner raceway groove formed at an appropriate position around the outer peripheral surface of the larger diameter portion, the first outer raceway groove formed on an inner peripheral surface of the sleeve so as to correspond with the first inner raceway groove, balls of the first row interposed between the first and second grooves an inner ring slidably fit over the reduced diameter portion, the second outer raceway groove formed on the inner peripheral surface of the inner ring, the second outer raceway groove formed on the inner peripheral surface of the sleeve so as to corrrespond with the second inner raceway groove, balls of the second row interposed between the second inner and outer raceway grooove, a stop ring provided around the inner periphery of the distal end of the reduced diameter portion, and a pre-loading spring interposed between the stop ring and an end surface of the inner ring to provide a suitable amount of pre-loading force to the inner ring.

摘要翻译： 本发明的目的是提供一种鼓风机，其包括减少部件数量的轴承结构，可以减少制造成本，并且可以增加轴的直径。 轴承结构的耐用性好，消除或减少旋转耗尽，并提供卓越的安静性。 本发明的鼓风机具有在对鼓风机通电时旋转的叶轮适配器， 用于支撑所述叶轮的旋转中心部的轴承装置，所述轴承装置包括： 一个套筒，一个包括一个较大直径部分的台阶轴和一个设置在其一端的一个减小直径部分，该第一内滚道槽形成在围绕该较大直径部分的外周面的适当位置处，该第一外滚道槽形成在 所述套筒的内周面与所述第一内侧滚道槽对应，所述第一列的滚珠插入在所述第一和第二槽之间，内圈可滑动地配合在所述缩径部上，所述第二外滚道槽形成在所述内圈 内圈的外周面，形成在套筒的内周面上的第二外滚道槽，以与第二内滚道槽对应，插入第二内滚道槽之间的第二列的滚珠，止动环 设置在所述缩径部的远端的内周的周围，以及设置在所述止挡之间的预加载弹簧 环和内圈的端面，以向内圈提供适当量的预加载力。

公开(公告)号：US06229237B1

公开(公告)日：2001-05-08

申请号：US09469270

申请日：1999-12-22

申请人： Rikuro Obara ,  Seiichi Matsuura

发明人： Rikuro Obara ,  Seiichi Matsuura

IPC分类号： H02K708

CPC分类号： G11B19/2009

摘要： Between rotation shaft 1a and the frame 4, two bearings 5 having inner races 5b narrower in width compared with outer races 5a are disposed and each of end faces of outer races 5a is made to abut each other. Since in general, the outer race and the inner race are secured in the size precision, by making each end faces of the outer race to abut each other, an assembling precision between two bearings 5 is secured. Further, spacing secured between inner races 5b enables to displace the inner ring 5b minutely due to the preload to be given to the end face of the inner races 5b at the time of assembling of the spindle motor, which is expected to absorb a minute play inevitable to the bearings, as a result to increase the rotation precision after completion of the spindle motor.

摘要翻译： 在旋转轴1a和框架4之间设置有两个具有与外圈5a相比宽度窄的内圈5b的两个轴承5，使外圈5a的每个端面相互抵接。 由于通常，通过使外圈的各端面彼此抵接，外圈和内圈以尺寸精度固定，确保了两个轴承5之间的组装精度。 此外，内圈5b之间的间隔使得能够在组装主轴电动机时由于预压力而使内圈5b微小地移动到内圈5b的端面，预期其将吸收一分钟 不可避免的轴承，从而提高主轴电机完成后的旋转精度。

公开(公告)号：US5843369A

公开(公告)日：1998-12-01

申请号：US769565

申请日：1996-12-19

申请人： Rikuro Obara ,  Yutaka Daikuhara

发明人： Rikuro Obara ,  Yutaka Daikuhara

IPC分类号： C22C38/18 ,  F16C33/62

CPC分类号： F16C33/62 ,  C22C38/18 ,  F16C19/06 ,  Y10S148/906

摘要： To provide a stainless steel for anti-friction bearings, which is obtained by making its eutectic carbide contents finer in particle diameter and suppressing the generation of non-metallic substances to an extremely low level, thus having a homogenious and dense structure and permitting highly accurate machining. The provided stainless steel is composed of 0.60 to 0.75% of carbon, 10.5 to 13.5% of chromium, 1.0% or below of silicon and 0.3 to 0.8% of manganese, % being by weight, the remainder of the composition being iron and inevitably introduced impurities, has a hardness of HRC 58 or above, contains eutectic carbide particles of 10 .mu.m and below in diameter, and has oxygen and titanium concentrations each of 10 ppm or below.

摘要翻译： 为了提供一种用于抗磨轴承的不锈钢，其通过使其共晶碳化物的粒径更细并且将非金属物质的产生抑制在非常低的水平上而获得，因此具有均匀且致密的结构并且允许高精度 加工。 所提供的不锈钢由碳的0.60〜0.75％，铬的10.5〜13.5％，硅的1.0％以下和锰的0.3〜0.8％构成，其中的铁是不可避免的， 杂质，具有HRC 58以上的硬度，含有直径10μm以下的共晶碳化物粒子，氧和钛的浓度各自为10ppm以下。

公开(公告)号：US5826989A

公开(公告)日：1998-10-27

申请号：US659478

申请日：1996-06-06

申请人： Rikuro Obara ,  Katashi Tatsuno

发明人： Rikuro Obara ,  Katashi Tatsuno

IPC分类号： H02K5/16 ,  F16C19/18 ,  F16C19/54 ,  F16C19/56 ,  F16C25/06 ,  F16C33/32 ,  F16C33/60 ,  F16C35/12 ,  G11B19/20 ,  H02K5/173 ,  F16C19/10

CPC分类号： H02K5/1737 ,  F16C19/505 ,  F16C19/54 ,  F16C25/06 ,  F16C33/32 ,  F16C33/60 ,  F16C35/12 ,  G11B19/2009 ,  H02K5/1735 ,  F16C19/08 ,  F16C2370/12

摘要： A compound ball bearing comprises a bearing body including a spindle 1, a sleeve 2 surrounding the spindle 1, and an inner ring fitted on the spindle or an outer ring fitted in the sleeve, and balls 5, 9 provided between the spindle 1 and sleeve 2, between the spindle and outer ring or between the inner ring 6 and sleeve 2. A motor component such as a hub 11 for the rotor, a flange for the motor base or a yoke yolder is molded as a one-piece molding with the sleeve, spindle or inner ring. The inner or outer ring can be secured in a proper position by facilitating its pre-loading, and the vibration accuracy of the spindle can be improved.

公开(公告)号：US20090160277A1

公开(公告)日：2009-06-25

申请号：US11628385

申请日：2005-05-27

申请人： Rikuro Obara

发明人： Rikuro Obara

IPC分类号： H02K7/08 ,  F16C32/06

CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/107 ,  F16C33/08 ,  F16C2370/12

摘要： A fluid dynamic bearing (1) with a rotating shaft (3) inserted into a sleeve (2) fitted into a case (7) is disclosed. Tree rotating shaft (3) rotates freely without contact with the sleeve (2) by means of dynamic pressure force generated by the lubricant fluid that fills the gap formed around the rotating shaft (3). An adhesive groove (2c) is formed around the entire outer circumferential surface of the sleeve (2). At least one hole (7a) facing the adhesive groove (2c) is formed in case (7), and case (7) and sleeve (2) are; adhered by the injection of an adhesive (13) into adhesive groove (2c) from the hole (7a). The fluid dynamic pressure bearing, manufactured in this manner provides a high-quality bearing that is easy to construct, that can be adapted to low-cost manufacturing, and that can maintain dimensional and structural accuracy and in which the case (7) and sleeve (2) can be reliably adhered together with the adhesive (13). Such bearing will maintain long-term airtightness of the joint between the sleeve (2) and the case (7) and prevent leakage of lubricant fluid during manufacture. The bearing can be used for a spindle and other compact motors for driving memory devices for magnetic discs and optical discs (such as a CD or a DVD), motors for polygon mirrors used for scanning processes of laser beam printers, and for small motors for use such as in axial flow fans.

摘要翻译： 公开了一种流体动力轴承（1），其具有插入套筒（2）中的旋转轴（3），该套筒（2）装配到壳体（7）中。 树旋转轴（3）通过填充形成在旋转轴（3）周围的间隙的润滑剂流体产生的动态压力而自由旋转而不与套筒（2）接触。 在套筒（2）的整个外周面上形成有粘接槽（2c）。 在壳体（7）和壳体（7）和套管（2）之间形成面向粘合剂槽（2c）的至少一个孔（7a） 通过从孔（7a）注入粘合剂（13）到粘合剂槽（2c）中来粘附。 以这种方式制造的流体动压轴承提供了易于构造的高品质轴承，其可以适应于低成本制造，并且可以维持尺寸和结构精度，并且其中壳体（7）和套筒 （2）可以与粘合剂（13）可靠地粘合在一起。 这种轴承将保持套筒（2）和壳体（7）之间的接头的长期气密性，并防止制造过程中润滑剂流体泄漏。 轴承可用于主轴和其他紧凑型电动机，用于驱动用于磁盘和光盘（如CD或DVD）的存储设备，用于激光束打印机扫描过程的多面镜的电机和用于小型电机的小型电机 使用如轴流式风机。

公开(公告)号：US07246440B2

公开(公告)日：2007-07-24

申请号：US10614212

申请日：2003-07-08

申请人： Rikuro Obara ,  Kenji Fukunaga

发明人： Rikuro Obara ,  Kenji Fukunaga

IPC分类号： F16C33/66 ,  B21D53/10 ,  B21K1/76 ,  B23P6/00 ,  B23P17/00

CPC分类号： F16C35/061 ,  F16C19/06 ,  F16C19/54 ,  F16C33/6622 ,  F16C2235/00 ,  H02K5/1735 ,  H02K5/1737 ,  Y10T29/49009 ,  Y10T29/497 ,  Y10T29/49702

摘要： A spindle motor is formed so as to support a pivot of a rotor by a pair of open bearings.The open bearings thus constructed will be less expensive and simple structures, so that a manufacturing cost thereof is reduced compared to a conventional spindle motor using a pair of ball bearings with shields. Accordingly, a low-cost spindle motor can be provided.

摘要翻译： 主轴电动机形成为通过一对敞开的轴承来支撑转子的枢轴。 如此构造的开式轴承的结构便宜且结构简单，与使用一对具有屏蔽的球轴承的常规主轴电机相比，其制造成本降低。 因此，可以提供低成本的主轴电动机。