A drive device for moving a leaf, in particular a door leaf or a window leaf, with an electric machine including an, in particular single, stator and an, in particular single, rotor, which can be rotated about a machine axis, and with a gear coupled to the electric machine. The gear has a first gear element, which can be rotated coaxially with the machine axis, with the first gear element being connected to the rotor in a rotationally-fixed manner.

A drive device has a transmission housing with an external rotor-type electric motor. The electric motor is coupled to the transmission and is actuated by a motor electronic unit. The electric motor has a stator and a rotor which circulates about the stator and is connected to a drive shaft that is guided through a stator bushing with a first sleeve section for holding the stator bushing in the transmission housing in a rotationally fixed manner and with a second sleeve section. A groove frame insulation which surrounds the stator teeth in the axial direction is placed on the second sleeve section. An annular element which is arranged between the first sleeve section and the groove frame insulation and which has a joint element is placed on the second sleeve section of the stator bushing. The joint element engages into a joint contour of the first sleeve section.

The invention relates to a spindle drive for a closure element of a motor vehicle, which spindle drive has a spindle/spindle nut mechanism which has a spindle and a spindle nut, wherein a motor-side drive portion has a drive unit with a drive motor and the spindle, wherein the spindle is connected downstream of the drive motor, wherein a spindle-nut-side drive portion of the spindle drive has the spindle nut, wherein the spindle drive has a drive housing with at least one housing tube which is fixed axially with respect to the motor-side drive portion, wherein a guide tube is arranged radially within the housing tube, which guide tube is fixed axially with respect to the motor-side drive portion and axially guides a drive component of the spindle drive during the drive movements.