Fluid dynamic pressure - the support means, the spindle motor with a fluid dynamics of pressure - bearing device and recording disks - before the direction of running gear

摘要

Fluid dynamic pressure - bearing device, comprising:a shaft member,a bearing member, which holds the shaft member and a relative movement between the shaft member and the bearing member allows,a sealing member with an upper wall, wherein the upper wall has a projection hole, through which an upper end part of the shaft member, wherein the sealing member is arranged to an upper end part of the bearing member to cover,a closure member, which has a lower end part of the bearing member closes, anda bearing gap, the dynamics of pressure comprises recesses which in each case between the spindle member and the bearing member and between the shaft member and the closure member are formed:a radially dynamic pressure depression in one of the outer circumferential surface of the shaft member or an inner peripheral surface of the bearing member is formed, wherein the radially dynamic pressure depression a dynamic pressure force is generated, which receives a load in a radial direction, a first thrust dynamic pressure depression in a downwardly directed surface of the shaft member or an upper surface of the closure member is provided, wherein the first thrust dynamic pressure depression a dynamic pressure force is produced,..