Fan assembly having a rotatingly drive hub

A fan assembly having a rotatingly driven hub comprising a hub housing, with a plurality of radial fan blades that can be pivoted toward the hub housing, with a central stationary supporting neck, on which the hub housing is supported in an axially stationary and rotationally supported manner, and with an actuating drive for the fan blades, which has a linear drive with an actuating element inserted into the supporting neck and an actuator that can be axially displaced via the actuating element, wherein an annular body that is non-rotational relative to the hub housing is radially supported in relation to the actuator and connected to the fan blades that can be adjusted in terms of their pitch via a plurality of drive elements that are engaged eccentrically in relation to the rotational axes thereof, wherein the actuator comprises a support body on the supporting neck that is axially displaceable and is guided thereon in a non-rotating manner wherein the actuating element of the linear drive comprises a spindle guided and supported in the supporting neck in an axially stationary manner, and the axially displaceable actuator comprises the support body encompassing the free end of the supporting neck, in the shape of a sleeve formed over the spindle.