Reduction gear with integrated with built-in lubricator for power steering

A mechanism comprising at least one wheel which is movably mounted in rotation, in at least one first direction of rotation about an axis of rotation, in a casing containing a lubricant, said wheel being delimited radially by a peripheral rim and axially by at least one first annular wheel flank secant to the axis of rotation, and which borders said rim, while the casing forms, about the axis of rotation and opposite to the first wheel flank, an annular cover crown, secant to the axis of rotation, and which radially overlaps said first wheel flank, said mechanism being characterized in that wherein the wheel includes at least one vane which protrudes axially on the first wheel flank, towards the cover crown, while the casing includes at least one deflector which protrudes axially on the cover crown, towards the first wheel flank, the vane and the deflector being arranged such that, in projection in a projection plane normal to the axis of rotation, the vane has, in the first direction of rotation, a first leading edge which describes a first scanning ring about the axis of rotation, while the deflector has a retaining edge which extends at least partially inside said scanning ring and whose yaw orientation is different from that of the first leading edge, such that, when the first leading edge of the vane approaches then overflies the retaining edge of the deflector in the first direction of rotation, the fictitious intersection point between the first leading edge and the retaining edge is displaced radially towards the rim, by gradually moving away from the axis of rotation, so that the relative movement of the wheel relative to the casing in the first direction of rotation allows the vane and the deflector to cooperate in order to discharge the lubricant towards the peripheral rim.