Drive arrangement for a door device, and door device

A drive arrangement to drive a door shaft of a door, the drive arrangement comprising:

• a driven shaft which is operatively connected to the door shaft, the driven shaft comprising an external toothing;
• a transmission arrangement which is configured to drive the driven shaft, the transmission arrangement comprising an eccentric gear transmission which comprises three orbiting toothed disks which are configured to orbit in a phase-shifted manner with respect to one another, each of the three orbiting toothed disks comprising,
• an outer periphery which comprises a concave part, and
• an internal toothing which is arranged in the concave part of the outer periphery,
• wherein the internal toothing of each of the three orbiting toothed disks is configured to mesh with the external toothing of the driven shaft;
• and
• three eccentric drive shafts, each of the three eccentric drive shafts being configured to drive the three orbiting toothed disks.