Fluid-dynamic bearing system for rotary mounting of spindle motor that is utilized for rotary driving of magnetic storage disk of hard disk drive, has stopper element arranged at end of shaft and partially formed as integral part of shaft

摘要

The system has radial bearings (22a, 22b) formed along an axially extending portion of a bearing gap (20). A fluid-dynamic thrust bearing (26) is arranged along a radially extending portion of the bearing gap. Sealing gaps (32, 34) outwardly seal an end of the bearing gap. A stopper element (18) is arranged at an end of a shaft (12) and joined to one of the sealing gaps. The stopper element is partially formed as an integral part of the shaft. A rotor component (14) has an annular groove for receiving a hollow cylindrical portion of a component of the stopper element. Independent claims are also included for the following: (1) a spindle motor (2) a hard disk drive.