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1. 发明申请

US20100052447A1 HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND INFORMATION DEVICE 审中-公开
标题翻译：水动力轴承装置，主轴电机和信息装置
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。

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