Spindle motor for operating hard disk drive and fan, has axial section formed between outer wall of hub and inner wall of base plate or between outer wall of hub and inner wall of laminated stator core

摘要

The motor (1) has a fluid-dynamic bearing system with a fixed motor component comprising a base plate (8) and a bush (3), and a rotatably movable motor component comprising a shaft pivotably supported in the bush. A hub (4) is connected with a shaft (2), and a barrier gap (10) has an axial section running parallel to rotation axes (22). The section is formed between an outer wall of the hub and an inner wall of the base plate or between an outer wall of the hub and an inner wall of a laminated stator core (15), or between an inner wall of the hub and an outer wall of the base plate.