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    • 27. 发明授权
    • Disc drive with self-pressurizing fluid bearing and
shaft-supporting-ball retaining element
    • 带有自加压流体轴承和轴支撑球保持元件的盘式驱动器
    • US5710678A
    • 1998-01-20
    • US478975
    • 1995-06-07
    • Hans LeutholdDavid John JenningsLakshman NagarathmanSteve GonzalezDean A. TarrantGunter Heine
    • Hans LeutholdDavid John JenningsLakshman NagarathmanSteve GonzalezDean A. TarrantGunter Heine
    • G11B19/20
    • G11B19/2009
    • The present invention replaces the current spindle motor ball bearing system of a hard disc drive by a system comprising three separate elements, including a self-pressurizing journal bearing for establishing radial stiffness which comprises a rotating shaft and sleeve with air or other fluid therebetween. A chevron or herringbone pattern is established on the sleeve or shaft to establish a self-pressurizing hydrodynamic bearing which maintains the stability of the system while providing for very simple manufacturing of the system. Additionally, a thrust bearing is defined based on the air pressure build-up between the housing for the disc stack and the disc stack itself. The term "integrated air-bearing" is used to name this thrust bearing because it is built up with components such as discs and housing which exist in any typical hard disc assembly. The integrated air-bearing may be sufficiently established by building up the bottom surface of the housing or the base of the housing to within a very close distance of the lower surface of the disc; preferably, both the top surface of the top disc and bottom surface of the bottom disc are located close to pads, or other configurations are built up to define a narrow gap between the top and bottom surfaces of the disc stack and the housing. Third, an axial elastic thrust bearing defines the axial position of the disc stack at rests and avoiding contact between the surfaces forming the integrated air-bearing (in other terms, disc and housing). This elastic thrust bearing comprises a ball fixed to the shaft that rest against an elastic shield fixed to the end sleeve of the journal bearing or the base of the disc drive. This bearing defines the axial position of the disc stack.
    • 本发明通过包括三个独立元件的系统来代替硬盘驱动器的当前主轴电机滚珠轴承系统,该系统包括用于建立径向刚度的自加压轴颈轴承,其包括旋转轴和具有空气或其它流体的套筒。 在套筒或轴上建立人字形或人字形图案以建立自加压流体动力轴承,其保持系统的稳定性,同时提供非常简单的系统制造。 另外,推力轴承是基于用于盘片的壳体和盘片本身之间的空气压力积分来定义的。 术语“一体式空气轴承”用于命名该推力轴承,因为它由诸如盘和壳体的部件组成,其存在于任何典型的硬盘组件中。 集成的空气轴承可以通过将壳体的底表面或壳体的底部构建到与盘的下表面非常接近的距离内来充分地建立; 优选地,顶盘的顶表面和底盘的底表面位于靠近垫的位置,或者构建其它构造以限定盘堆叠和壳体的顶表面和底表面之间的窄间隙。 第三,轴向弹性止推轴承限定盘片在静止时的轴向位置,并避免形成一体式空气轴承(换句话说,盘和壳体)的表面之间的接触。 该弹性止推轴承包括固定到轴上的球,其抵靠固定到轴颈轴承的端套或磁盘驱动器的底座的弹性屏蔽。 该轴承定义了盘叠的轴向位置。