Patent ID: 7514635
Filing Date: 2009-04-07
Classification: H01H

Abstract:
1. A shaft of a drive comprising two electrically conducting connecting pieces, which can be connected to different electric potentials, and an insulating tube, which is subjected to torsional loading introduced by the drive, wherein the two connecting pieces are respectively fastened to one of the two ends of the insulating tube, the shaft comprising an embedding for fastening at least one of the two connecting pieces to the insulating tube, the embedding comprises an embedded part, which is formed by an end portion of one of the two connecting pieces, and an embedding body, which is formed of the insulating tube produced by a casting process thereby producing a construction with positive engagement and freedom from play between the end portion of one of the two connecting pieces and the insulating tube, and, in the embedding, the end portion of the connecting piece comprising an outer periphery and the insulating tube comprising an inner periphery defining a form-fit connection between the embedded part and the embedding body, the outer periphery of the end portion and the inner periphery of the insulation tube having a non-circular cross-section thereby allowing torques introduced by the drive to be transmitted by the connecting pieces and insulating tube.