Spindle motor for use in hard disk drive for driving magnetic storage disks, has air bearings formed by annular bearing surface in region of larger diameter of rotary component and annular bearing surface of stationary component

摘要

The motor (10) has stationary and rotary motor components rotatably supported relative to each other by hydrodynamic conical, radial and axial bearings (22, 24, 30, 32) and rotationally driven by an electro-magnetic drive system. Axial and radial air bearings (52, 62) are formed by an annular bearing surface in a region of larger diameter of the rotary component and an annular bearing surface of the stationary component. The bearing surfaces are separated from each other by an air gap, and the air bearings are characterized by pump structures, which are arranged on the bearing surfaces.