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Invention Grant
US08861129B2 Spindle motor having enhanced bearing rigidity and increased storage space for lubricating fluid and hard disk drive including the same 有权
主轴电动机具有增强的轴承刚性和增加用于润滑液的储存空间和包括其的硬盘驱动器

Spindle motor having enhanced bearing rigidity and increased storage space for lubricating fluid and hard disk drive including the same
Abstract:
There is provided a spindle motor including: a shaft including a body portion and an extending portion extending from an upper portion of the body portion in an outer radial direction; a sleeve rotatably supporting the shaft; a rotor rotating in conjunction with the shaft and having a stopper portion facing an outer circumferential surface of the sleeve; and a cover plate coupled to the sleeve, while maintaining a gap with lower portions of the shaft and the sleeve, wherein the cover plate includes an airtight portion disposed below the shaft and the sleeve, an inner wall portion extending from the airtight portion in an axial direction and coupled to an outer circumferential surface of the sleeve, an outer wall portion coupled to a base member, and an upper wall portion connecting an upper end of the inner wall portion and an upper end of the outer wall portion.
Abstract(Chinese):

提供了一种主轴电动机，其包括：轴，包括主体部分和从主体部分的上部沿径向方向延伸的延伸部分; 可旋转地支撑轴的套筒; 与所述轴一起旋转并具有面向所述套筒的外周表面的止动部分的转子; 以及与所述套筒联接的盖板，同时与所述轴和所述套筒的下部保持间隙，其中所述盖板包括设置在所述轴和所述套筒下方的气密部分，从所述气密部分延伸的内壁部分 轴向方向并且联接到套筒的外周表面，连接到基部构件的外壁部分和连接内壁部分的上端和外壁部分的上端的上壁部分。

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