公开(公告)号：US6127756A

公开(公告)日：2000-10-03

申请号：US261902

申请日：1999-03-03

申请人： Tadao Iwaki ,  Kimio Komata

发明人： Tadao Iwaki ,  Kimio Komata

IPC分类号： G11B19/20 ,  F16C17/10 ,  F16C33/10 ,  F16C33/24 ,  H02K7/08 ,  H02G5/16

CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/045 ,  F16C17/102 ,  F16C17/105 ,  H02K7/088

摘要： A spindle motor has a rotor, a stator and an air dynamic pressure bearing for supporting the rotor for rotation about a rotational axis relative to the stator. The air dynamic pressure bearing comprises a first dynamic pressure bearing portion and a second dynamic pressure bearing portion. The first dynamic pressure bearing portion comprises a convex side bearing member having a conical convex portion, a concave side bearing member having a conical concave portion receiving the conical convex portion, and dynamic pressure generating grooves formed on one of a surface of the conical convex portion and a surface of the conical concave portion. The second dynamic pressure bearing portion comprises a shaft having a first end fixed to the concave side bearing member and extending along the rotational axis, a bore formed in the convex side bearing member for receiving a second end of the shaft to permit rotation of the convex side bearing member relative to the concave side bearing member about the shaft, and dynamic pressure grooves formed on one of an outer circumferential surface of the shaft and an inner circumferential surface of the bore.

摘要翻译： 主轴电动机具有转子，定子和空气动压轴承，用于支撑转子相对于定子绕旋转轴线旋转。 空气动压轴承包括第一动压轴承部分和第二动压轴承部分。 第一动压轴承部分包括具有锥形凸部的凸侧支承构件，具有容纳锥形凸部的锥形凹部的凹侧支承构件和形成在锥形凸部的一个表面上的动压产生槽 和锥形凹部的表面。 第二动压轴承部分包括轴，其具有固定到凹侧支承构件并沿着旋转轴线延伸的第一端，形成在凸侧轴承构件中的孔，用于接收轴的第二端以允许凸起 侧轴承构件相对于凹侧支承构件绕轴旋转，动压槽形成在轴的外周面和孔的内周面之一上。