The invention relates to an actuator, comprising a spindle drive, a first gear which causes a translational displacement of a first connection unit connected to the spindle drive, and a second gear which engages with the first gear and which is rotationally coupled to a second connection unit, wherein the actuator is designed such that a relative rotation of the two gears with respect to each other causes an actuation of the spindle drive and a displacement of the spindle drive relative to the central axis of the second gear. Furthermore, the invention relates to devices for supporting a pivot member, such as a door, with respect to a parent assembly, such as a vehicle body.