公开(公告)号：US20110007989A1

公开(公告)日：2011-01-13

申请号：US12815289

申请日：2010-06-14

申请人： Taketo NONAKA ,  Toshiki MAEDA

发明人： Taketo NONAKA ,  Toshiki MAEDA

IPC分类号： F16C32/06

CPC分类号： F16C33/745 ,  F16C17/107 ,  F16C33/103 ,  F16C2240/40 ,  F16C2370/12

摘要： A bearing unit for a disk drive device is formed by a sleeve concave portion and a shaft concave portion, and is provided with a capillary seal portion in which the gap between the sleeve concave portion and the shaft concave portion is increased in diameter toward the hub side of the sleeve. Assuming that: the outer circumferential diameter at the tilt starting end on the base member side of the shaft concave portion is D0; the inner circumferential diameter at the tilt starting end on the hub side of the sleeve concave portion is D1; the facing outer circumferential diameter of the shaft concave portion, which faces, in the radial direction, the inner circumference at the tilt starting end of the sleeve concave portion, is D2; and the diameter of the most concave inner circumference of the sleeve concave portion is D3, D2 is larger than D0, D3 is larger than D1, and the difference between D3 and D0 is larger than that between D0 and D2.

摘要翻译： 用于盘驱动装置的轴承单元由套筒凹部和轴凹部形成，并且设置有毛细管密封部，毛细管密封部中套筒凹部与轴凹部之间的间隙直径朝向轮毂 袖子的一侧。 假设：轴凹部的基体侧的倾斜起始端的外周径为D0; 套筒凹部的轮毂侧的倾斜起始端的内周径为D1; 在轴向凹部的倾斜起始端的径向的内周面上的轴凹部的面向外周径为D2， 并且套筒凹部的最凹陷的内周的直径为D3，D2大于D0，D3大于D1，D3和D0之间的差大于D0和D2之间的差。