Apparatus for adjusting air gap in toroidal type linear motor.

摘要

An apparatus for adjusting air gap in a toroidal type linear motor which includes a moving element (28) having a cylindrical through opening and a stationary element (38) received in the cylindrical through opening, and in which the moving element is so movable as to maintain a predetermined annular air gap between the stationary and moving elements, said apparatus comprising: a plurality of rollers (46) rotatably fixed to the top and bottom surface of the moving element; and biasing means (52) for biasing the rollers toward the central axis of the stationary element, and for cooperating with said rollers for maintaining the annular air gap.