Method and device to draw-in coils into slots of stator laminated cores of electric machines

Abstract

A method and apparatus for drawing windings into slots in laminated stators of electrical machines by producing coils on a form and transferring the coils onto an insertion tool. The insertion tool includes appropriately annularly arrayed parallel short and long insertion shafts having free ends and an axially driven insertion block fastened to the short insertion shafts. In a first phase of the insertion process, the insertion tool draws in the coils into the slots where the short insertion shafts and long insertion shafts, with their free ends, move upward from a starting position through the bore of the stator past the upper edge of the stator to a second position. In a second phase, the long insertion shafts are retracted to a third position with their free ends just above the upper edge of the stator while the insertion block and the short insertion shafts move together forward to the third position. In a third phase, the insertion block, the short insertion shafts and the long insertion shafts return from their respective third position to the starting position.

Dependencies are inferred from the claim text.