Self-Energized Air-Bearing Spindle in a Disk Drive Motor
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
In a data recording disk file a plurality of disks are supported on and rotated by a central spindle of a drive motor. The spindle is supported during its rotation by an air-bearing along the spindle axis and between the end of the spindle and an end plate, the latter air-bearing providing a thrust bearing for the spindle. The end plate includes a plurality of sectors of negative pressure air-bearing surfaces arranged on the outer perimeter which causes a self-energized air-bearing to be created between the end plate and the end of the spindle during rotation of the spindle. As shown in Fig. 1, the spindle 10 is rotatable within a housing 12 and prevented from contact with housing 12 by an air-bearing in the cylindrical gap 14.