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1. 发明申请

WO2006033758A3 ELECTROCHEMICAL MACHINING TOOL AND METHOD FOR MACHINING A PRODUCT USING THE SAME 审中-公开
标题翻译：电化学加工工具及其加工产品的方法
公开(公告)号：WO2006033758A3
公开(公告)日：2007-01-11
申请号：PCT/US2005030072
申请日：2005-08-25
申请人： MINEBEA CO LTD , OBARA RIKURO , YASUDA TOMOYUKI
发明人： OBARA RIKURO , YASUDA TOMOYUKI
IPC分类号： C25D17/12 , B23H3/00 , B23H3/04 , B23H5/02 , B23H5/10 , B23H7/26 , B23H7/32 , B23H9/02 , B23H11/00
CPC分类号： B23H9/00 , B23H3/04 , B23H2200/10
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：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，并且去除与之相关联的毛刺（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动机中的流体动力压力轴承中。

2. 发明申请

WO2005119072A3 FLUID DYNAMIC PRESSURE BEARING 审中-公开
标题翻译：流体动力压力轴承
公开(公告)号：WO2005119072A3
公开(公告)日：2006-12-21
申请号：PCT/US2005018641
申请日：2005-05-27
申请人： MINEBEA CO LTD , OBARA RIKURO
发明人： OBARA RIKURO
IPC分类号： F16C17/10 , F16C32/06 , F16C33/08 , F16C33/10 , F16C35/02
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。

3. 发明申请

WO2005047717A3 FLUID DYNAMIC BEARING MECHANISM 审中-公开
标题翻译：流体动力轴承机构
公开(公告)号：WO2005047717A3
公开(公告)日：2005-12-15
申请号：PCT/US2004026628
申请日：2004-08-17
申请人： NMB USA INC , MINEBEA CO LTD , OBARA RIKURO
发明人： OBARA RIKURO
IPC分类号： F16C20060101 , F16C32/06 , F16C33/10
CPC分类号： F16C17/107 , F16C17/105 , F16C2370/12
摘要： A fluid dynamic bearing mechanism (1) that can ensure bearing rigidity, reduce shaft loss torque, reduce power consumption, stabilize axial rotation, and improve rotational accuracy is disclosed. The fluid dynamic bearing mechanism (1) is suitable for use in a hard disk drive. In the fluid dynamic bearing mechanism (equipped with a bearing case (10) endplate (20), and shaft (30)) a cylindrical hole (11) of the bearing case is stepped cylindrical hole that has a large diameter part (11a) and a small diameter part (11b). The shaft is stepped shaft that has a large diameter part (31a) and a small diameter part (31b). On the outer circumference of either the large diameter part of the stepped cylindrical hole, or the large diameter part of the stepped shaft, a first dynamic pressure groove (51) is formed. On the outer circumference of either the small diameter part of the stepped cylindrical hole or the small diameter part of the stepped shaft, a second dynamic pressure groove (52) is formed. On the surface of a step part of the stepped cylindrical hole, the third dynamic pressure groove (53) is formed. The small gaps that face each of the three dynamic pressure grooves are filled with a dynamic pressure generating lubricating oil.
摘要翻译：公开了一种能够确保轴承刚性，减少轴损失转矩，降低功耗，稳定轴向旋转并提高旋转精度的流体动力轴承机构（1）。流体动力轴承机构（1）适用于硬盘驱动器。在具有轴承箱（10）端板（20）和轴（30））的流体动力轴承机构中，轴承箱的圆柱形孔（11）是具有大直径部分（11a）和小直径部分（11b）。轴是具有大直径部分（31a）和小直径部分（31b）的台阶轴。在台阶式圆柱形孔的大直径部分或阶梯轴的大直径部分的外圆周上形成有第一动压槽（51）。在阶梯式圆柱形孔的小直径部分或阶梯轴的小直径部分的外圆周上形成有第二动压槽（52）。在台阶式圆柱形孔的台阶部分的表面上形成第三动压槽53。面对三个动态压力槽中的每一个的小间隙填充有动态压力产生润滑油。

4. 发明申请

WO2005113995A3 FLUID DYNAMIC BEARING AND STORAGE DISK DRIVE WITH A SPINDLE MOTOR HAVING THE FLUID DYNAMIC BEARING 审中-公开
标题翻译：流体动力轴承和存储盘驱动器，带有流体动力轴承的主动马达
公开(公告)号：WO2005113995A3
公开(公告)日：2007-04-12
申请号：PCT/US2005016389
申请日：2005-05-11
申请人： MINEBEA CO LTD , OBARA RIKURO
发明人： OBARA RIKURO
IPC分类号： F16C17/02 , F16C17/10 , F16C32/06 , F16C33/10 , F16C33/74 , G11B19/20 , H02K5/167 , H02K7/08
CPC分类号： F16C33/107 , F16C17/107 , F16C2370/12
摘要： A hydrodynamic bearing having a bearing sleeve (7), a rotational shaft (11) supported for rotation by the bearing sleeve, a bearing gap (21) formed between the bearing sleeve and the rotational shaft, lubrication oil (12) contained within the bearing gap, at least one hydrodynamic pressure-generating groove (24) formed at an inner peripheral surface of the bearing sleeve; and an oil reservoir (29). The oil reservoir includes a gradually expanding section (33) located in a position distanced from the pressure-generating groove and a first larger inner diameter section (31a) located adjacently to the gradually expanding section. A second larger inner diameter section (31B) is located immediately below an opening of the bearing sleeve and an oil-repelling peripherial groove (32) located between the first larger inner diameter section of the oil reservoir and the second larger diameter section. The oil-repelling peripheral groove and the second larger diameter section constitute an oil scatter and leakage prevention mechanism of the fluid dynamic bearing.
摘要翻译：一种流体动力轴承，其具有轴承套筒（7），支撑用于由轴承套筒旋转的旋转轴（11），形成在轴承套筒和旋转轴之间的轴承间隙（21），包含在轴承内的润滑油间隙，形成在所述轴承套筒的内周面上的至少一个流体动力学压力产生槽（24）和油箱（29）。储油器包括位于远离压力产生槽的位置的逐渐扩大部分（33）和与逐渐扩张部分相邻的第一较大内径部分（31a）。第二较大的内径部分（31B）位于轴承套筒的开口的正下方，以及位于储油器的第一较大内径部分和第二较大直径部分之间的排油周边槽（32）。排油周边槽和第二较大直径部分构成流体动力轴承的油分散防漏机构。

5. 发明申请

WO2005124170A3 FLUID DYNAMIC PRESSURE BEARING, SPINDLE MOTOR USING THE FLUID DYNAMIC PRESSURE BEARING AND RECORDING DISK DRIVE UNIT USING THE SPINDLE MOTOR 审中-公开
标题翻译：流体动力压力轴承，使用流体动力轴承的主轴电机和使用主轴电机的记录盘驱动单元
公开(公告)号：WO2005124170A3
公开(公告)日：2007-01-04
申请号：PCT/US2005020321
申请日：2005-06-09
申请人： MINEBEA CO LTD , OBARA RIKURO
发明人： OBARA RIKURO
IPC分类号： F16C17/10 , F16C32/06 , F16C33/08 , F16C33/10 , F16C35/02 , G11B19/20 , H02K5/16
CPC分类号： G11B19/2018 , F16C17/107 , F16C33/08 , F16C33/107 , F16C2370/12 , H02K5/163
摘要： A shaft body 2 of a fluid dynamic bearing having a flange portion 4 at one end is supported rotatably via radial direction micro clearances by the sleeve 5 having a dynamic pressure generating groove 11 on the inner peripheral portion. A flange portion 4 is inserted between the lower end surface of the sleeve 5 and end plate 7. A dynamic pressure generating groove 12 is formed on the lower end surface of sleeve 5, and a dynamic pressure generating groove 13 is formed on the upper surface of the endplate 7. The lower end surface of the sleeve 5 and the upper surface of the flange portion 4, and the upper surface of the end plate 7 and the lower surface of the flange portion 4 are facing each other via respective thrust direction micro clearances. Sleeve 5 is inserted into the case 6 such that the upper end surface is projected from the upper end surface of the case 6. The outer peripheral face of the sleeve is fixed at the upper end of the case 6 by filling an adhesive in an adhesive reservoir formed between the sleeve 5 and the case 6. Adhesion and leakage of the adhesive to the locations other than the specified locations to be filled can be prevented, the number of manufacturing steps for the fluid dynamic bearing is reduced, quality is maintained, mass procucibility is improved and low cost production is achieved.
摘要翻译：具有在一端具有凸缘部分4的流体动力轴承的轴体2通过径向方向的微间隙可旋转地通过在内周部分上具有动压产生槽11的套筒5支撑。在套筒5的下端面和端板7之间插入有凸缘部4.在套筒5的下端面上形成动压产生槽12，在上表面形成动压生成槽13 套筒5的下端面和凸缘部分4的上表面以及端板7的上表面和凸缘部分4的下表面通过相应的推力方向微型面对间隙。套筒5插入到壳体6中，使得上端表面从壳体6的上端面突出。套筒的外周面通过将粘合剂填充到粘合剂中而固定在壳体6的上端可以防止粘合剂与要填充的特定位置之间的位置的粘合和泄漏，流体动力轴承的制造步骤数量减少，质量得到保持，质量提高了生产性，实现了低成本生产。

6. 发明申请

WO2005117006A2 FLUID DYNAMIC PRESSURE BEARING, SPINDLE MOTOR AND STORAGE DISK DRIVE DEVICE HAVING THE FLUID DYNAMIC PRESSURE BEARING AND A METHOD OF MANUFACTURING THEREOF 审中-公开
标题翻译：流体动力压力轴承，具有流体动力压力轴承的主轴电动机和存储盘驱动装置及其制造方法
公开(公告)号：WO2005117006A2
公开(公告)日：2005-12-08
申请号：PCT/US2005016844
申请日：2005-05-13
申请人： MINEBEA CO LTD , NMB USA INC , OBARA RIKURO , YOSHIKAWA HIROSHI
发明人： OBARA RIKURO , YOSHIKAWA HIROSHI
IPC分类号： F16C17/02 , F16C17/04 , F16C33/10 , F16C33/12 , G11B15/68 , G11B19/20
CPC分类号： G11B19/2018 , F16C17/045 , F16C17/107 , F16C33/107 , F16C33/121 , F16C2204/60 , F16C2370/12 , Y10T29/49639 , Y10T29/49707
摘要： A fluid dynamic bearing having a shaft and a bearing sleeve rotatably supported relative to each other. At least one of the shaft and the bearing sleeve is made of steel or stainless steel made of by weight C: 0.6~1.20%; Si: 1.0% or less; Mn: 1.0% or less; Cr: 10.5~18.0%; Mo: 1.0% or less; S.: 0.03% or less; and Fe. The dynamic pressure bearing surface is formed by ridges remaining in between multiple dynamic pressure grooves formed by electrochemical machining.
摘要翻译：一种流体动力轴承，其具有轴和相对于彼此可旋转地支撑的轴承套。轴和轴承套中的至少一个由钢或不锈钢制成，重量C：0.6〜1.20％; Si：1.0％以下; Mn：1.0％以下; Cr：10.5〜18.0％; Mo：1.0％以下; S：0.03％以下; 和Fe。动压轴承表面由残留在通过电化学加工形成的多个动压槽之间的脊形成。

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