Drive device for moving a covering element, door component and method for assembling the drive device

The device has a drive (33), a guide arrangement (31), a thrust element (32) connected to the drive, guided in the guide element and for connection to the cover element for the purpose of moving the cover element. The drive is coupled to the thrust element via a transfer arrangement for driving the thrust element, whereby the transfer arrangement extends at least partly into the guide arrangement. Independent claims are also included for the following: (A) a vehicle door assembly (B) and a method of fitting a drive device.