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    Ferrofluid cap seal for spindle motor
    2.
    发明授权
    Ferrofluid cap seal for spindle motor 失效
    用于主轴电机的碳氟化物盖密封

    公开(公告)号：US06334616B1

    公开(公告)日：2002-01-01

    申请号：US09416970

    申请日：1999-10-12

    申请人： M. Amine Hajji ,  Andrew K. Hanlon ,  Holavanahally Seshachar Nagaraj

    发明人： M. Amine Hajji ,  Andrew K. Hanlon ,  Holavanahally Seshachar Nagaraj

    IPC分类号： F16J1544

    CPC分类号： F16J15/43

    摘要： A hard disk drive spindle motor has a hub, a drive shaft, and a bearing therebetween. The spindle motor also has a ferrofluid seal to prevent any incidental oil emissions from the bearing from entering the drive. A ferrofluid cap is mounted on the axial end of the spindle motor for sealing the ferrofluid seal. The cap is a flat ring and has an elastomeric pad around its outer edge. The pad seats in a recess in the bore of the hub. The cap does not touch the shaft as it rotates with the hub about the shaft. Any excess ferrofluid from the ferrofluid seal is forced radially outward away from the shaft by centrifugal force. The cap contains the excess ferrofluid within the spindle motor and prevents it from entering other areas of the disk drive.

    摘要翻译： 硬盘驱动主轴电机具有毂，驱动轴和它们之间的轴承。 主轴电机还具有铁磁流体密封件，以防止任何偶然的轴承中的排放物进入驱动器。 铁芯流体盖安装在主轴电机的轴向端，用于密封铁磁流体密封。 盖子是一个平的环，并且在其外缘周围具有弹性垫。 垫座位于轮毂孔中的凹槽中。 当轴毂绕轴旋转时，盖子不会碰到轴。 来自铁磁流体密封件的任何多余的铁磁流体通过离心力径向向外离开轴。 盖子包含主轴电机内的过量铁磁流体，并防止其进入磁盘驱动器的其他区域。

    Ball bearing oil/grease loss containment method
    4.
    发明授权
    Ball bearing oil/grease loss containment method 有权
    滚珠轴承油/油脂损失容纳法

    公开(公告)号：US06179472B2

    公开(公告)日：2001-01-30

    申请号：US09170377

    申请日：1998-10-13

    申请人： Larry Joe Gilliland ,  Holavanahally Seshachar Nagaraj ,  Daniel Stacer

    发明人： Larry Joe Gilliland ,  Holavanahally Seshachar Nagaraj ,  Daniel Stacer

    IPC分类号： F16C3378

    CPC分类号： F16C33/80 ,  F16C19/06 ,  F16C33/7846 ,  Y10S277/925

    摘要： Shield designs for ball bearing based spindle motors that exhibit containment of grease and the base oil within the bearings at accelerated conditions of temperature and speed are provided at the shield OD contact area, the use of an impervious shield material, the use of barrier films, shield/bearing designs that use tortuous paths and labyrinth schemes for reducing the oil and grease loss from the shield ID gap of DASD spindle ball bearings, and stainless steel shield designs.

    摘要翻译： 在加速的温度和速度条件下，在轴承内容纳润滑脂和基础油的基于球轴承的主轴电动机的屏蔽设计设置在屏蔽OD接触区域，使用不透水屏蔽材料，使用阻挡膜， 使用曲折路径和迷宫方案的屏蔽/轴承设计，可减少DASD主轴滚珠轴承的屏蔽ID间隙产生的油脂损失，以及不锈钢屏蔽设计。

    Fluid bearing seal and support structure
    6.
    发明授权
    Fluid bearing seal and support structure 失效
    流体轴承密封和支撑结构

    公开(公告)号：US06339515B2

    公开(公告)日：2002-01-15

    申请号：US09314486

    申请日：1999-05-18

    申请人： Chen-Hsiung Lee ,  Holavanahally Seshachar Nagaraj ,  Neal Bertram Schirle

    发明人： Chen-Hsiung Lee ,  Holavanahally Seshachar Nagaraj ,  Neal Bertram Schirle

    IPC分类号： G11B1702

    CPC分类号： F16C33/107 ,  F16C33/74 ,  F16C2370/12 ,  G11B19/2018 ,  G11B25/043 ,  H02K5/124 ,  H02K5/1677

    摘要： A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft and a bearing plate and load plate coupled to a sleeve, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier disposed between the sleeve and the stator. A second diffusion barrier is disposed between the load plate and the shaft. The bearing structure may also include an O-ring disposed above the bearing plate for sealing a gap between the bearing plate and the sleeve.

    摘要翻译： 公开了一种用于主轴电动机的轴承结构。 轴承结构提供流体轴承密封和支撑结构，其可以同时解决防止漏油，保持轴承在冲击下的完整性，减少油蒸发和最小化主动轴承表面的变形的问题。 轴承结构包括联接到轴的推力板和联接到套筒的支承板和承载板，其中负载板朝向推力板推动支承板，并且其中粘合剂介于负载板和止推板之间 。 粘合剂可以是UV环氧树脂。 套筒可操作地联接到定子，并且定子在接收到驱动信号时旋转套筒。 轴承还包括设置在套筒和定子之间的扩散阻挡层。 第二扩散阻挡层设置在负载板和轴之间。 轴承结构还可以包括设置在支承板上方的用于密封支承板和套筒之间的间隙的O形环。

    Ball bearing oil/grease loss containment shield
    7.
    发明授权
    Ball bearing oil/grease loss containment shield 失效
    滚珠轴承油/油脂损失防护罩

    公开(公告)号：US06280094B1

    公开(公告)日：2001-08-28

    申请号：US09604146

    申请日：2000-06-27

    申请人： Larry Joe Gilliland ,  Holavanahally Seshachar Nagaraj ,  Daniel Stacer

    发明人： Larry Joe Gilliland ,  Holavanahally Seshachar Nagaraj ,  Daniel Stacer

    IPC分类号： F16C3378

    CPC分类号： F16C33/80 ,  F16C19/06 ,  F16C33/7846 ,  Y10S277/925

    摘要： Improved shield designs for ball bearing based spindle motors that exhibit improved containment of grease and the base oil within the bearings at accelerated conditions of temperature and speed is disclosed. Improved shield designs are provided at the shield OD contact area, the use of an impervious shield material, the use of barrier films, shield/bearing designs that use tortuous paths and labyrinth schemes for reducing the oil and grease loss from the shield ID gap of DASD spindle ball bearings, and improved stainless steel shield designs.

    摘要翻译： 公开了改进的用于基于滚珠轴承的主轴电机的屏蔽设计，其在加速的温度和速度条件下表现出改善的轴承内润滑脂和基础油的容纳性。 在屏蔽OD接触区域提供改进的屏蔽设计，使用不透水屏蔽材料，使用阻挡膜，使用曲折路径的屏蔽/轴承设计和迷宫方案，以减少来自屏蔽ID间隙的油和油脂损失 DASD主轴球轴承，以及改进的不锈钢护罩设计。