Apparatus for bending ends, arranged in annular layers, of bar conductors of a stator of an electrical machine

An apparatus for bending ends, arranged in at least four annular layers, of straight or bent bar conductors arranged in at least four annular layers of a stator of an electrical machine of an electric motor or generator, the apparatus comprising:

• a holder, in particular a clamping holder, for the stator;
• at least four coupling members which are arranged concentrically with respect to a center axis of the apparatus wherein a front end of each of the coupling members has a large number of annularly arranged coupling recesses for gripping the ends of the bar conductors of one of the annular layers, respectively;
• and
• wherein each coupling member has a first drive device for displacing the coupling member in an axial direction of the center axis and a second drive device for rotating the coupling member about the center axis so that all the coupling members can be axially displaced and rotated independently of each other;
• wherein an individual drive platform is provided for each coupling member, wherein each coupling member is rotatable but axially fixedly supported on the respective drive platform about the center axis, wherein the drive platforms are individually displaceably arranged on a common fixed jacking rod assembly along the center axis, wherein the jacking rod assembly comprises at least two jacking rods which are arranged parallel with the center axis, and wherein each respective drive platform has:
• the first drive device and the second drive device of the coupling member provided for the respective drive platform;
• at least two jacking pieces for axially displacing the respective drive platform along the axial direction, wherein the jacking pieces are axially secured to the drive platform and are each coupled to one of the jacking rods, and wherein the jacking pieces are driven by the first drive device of the respective drive platform;
• and
• a gear mechanism for rotating the coupling member relative to the drive platform, wherein the gear mechanism is coupled to the coupling member of the respective drive platform and is driven by the second drive device of the respective drive platform.