Spare wheel pickup assembly

A unit for picking up a spare wheel of a vehicle, the unit comprising:

• a cable that supports and determines the vertical disposition of the spare wheel,
• a drum onto which the cable is wound, the drum rotatable in a first direction to at least partially unwind the cable from the drum to effectuate a lowering of the spare wheel, the drum rotatable in a second direction opposite the first direction to effectuate a raising of the spare wheel,
• a gear assembly configured to apply a torque on the drum to cause the drum to rotate in either the first or second directions, the gear assembly comprising a cam having a wobbling movement as the gear assembly transmits the torque,
• a rotatable stop situated adjacent a side edge of the cam and configured to act on the edge of the cam to limit the travel of the cam during the wobbling movement, the stop having a first contact surface and second contact surface, the edge of the cam configured to slide along the first contact surface as the drum is rotated in the second direction by operation of the cam;
• and
• a guide surface configured to interact with the second contact surface of the stop to limit the rotation of the stop when the edge of the cam acts on the stop.