Device arrangement of the mechanical control of the rotation of a wheel mounted on a wheel hub

The arrangement has a crown (30) immobilized in rotation with respect to a spindle (10). A cage (32) is provided with two planet gears (34), and is rotatably integrated with a hub (12) of a wheel. The wheel is fixed on the hub rotatably mounted on the spindle, by interposition of a bearing (16) fixed by a nut (20). A hub head (24) is fixed on the hub by a fixation unit i.e. screw (26). A spacer (42) is interposed between the hub and the hub head. The spacer carries the cage with the planet gears. The crown is fixed on a fixed support (36) integrated with the spindle.