Fluid dynamic bearing for spindle motor of hard disk drive, has two bearing components rotatable together at axis of rotation, where one bearing component has bearing bush, and another bearing component has shaft

摘要

The fluid dynamic bearing has two bearing components rotatable together at an axis of rotation (14). A section of an upper surface of a bearing component is provided with additional groove structures (36,40), where the upper surface is arranged in an area of a bearing gap (16). One bearing component has a bearing bush (10), and another bearing component has a shaft (12).