Drive system for a wind turbine

A drive system for a wind turbine, comprising

• a transmission unit comprising at least one planetary gear stage which has a ring gear, a plurality of planetary gears, a planetary carrier and a sun gear,
• a first shaft which is associated with the transmission unit and has a coupling flange configured for connection to a work machine shaft or a rotor shaft, and which is supported by the planetary carrier,
• a gearbox housing enclosing the transmission unit and a motor or a generator unit connected to a second shaft of the transmission unit,
• a rotor of the motor or generator unit which is connected in a rotatably fixed manner to a hollow rotor shaft,
• a coupling or clamping connection arranged radially between the second shaft of the transmission unit and the hollow rotor shaft,
• a gearbox housing support arranged between transmission unit and the motor or generator unit and having a hollow cylindrical extension which concentrically encloses a motor-side or generator-side end section of the second shaft of the transmission unit and forms a bearing seat for a bearing arrangement radially disposed between the second shaft and the hollow cylindrical extension, wherein rotor and the hollow rotor shaft concentrically enclose the hollow cylindrical extension,
• at least one outer bearing element of the bearing arrangement which is connected to the hollow cylindrical extension, with the bearing arrangement supporting both the second shaft of the transmission unit and the hollow rotor shaft.