Device for lubricating a geartrain

A device for lubricating a geartrain arranged in an internal chamber of a housing, said chamber having a bottom part which forms a storing area for storing a lubricant for the gear train and in which a bottom part of one of the gears rotating around an axis is normally immersed, characterized in that the chamber has, at least locally around the one gear, a peripheral inner profile matching substantially the peripheral outline of said one gear, adjacent the latter, and comprises, at a level higher than that of said bottom part of said chamber, a separating nose extending inwardly into said chamber and toward the periphery of said one gear and connected to a discharge conduit which is formed in said housing and opens inwardly in said chamber in front of said nose relative to a direction of rotation of said one gear, the discharge conduit communicating outwardly with a top part of a lubricant storage container located outside said housing and having a base portion communicating with said bottom part of said chamber via an external return conduit, said storage container defining a generally vertical inner accumulation volume divided, by a partition wall, into first and second chambers intercommunicating via a passage formed in a lower part of said partition wall, said discharge conduit opening outwardly, at a first level, in an upper part of said first chamber, and the storage container further comprising a feeding conduit having a lower portion communicating with said bottom part of said internal chamber and opening upwardly at a second level into an upper part of said second chamber.