Patent ID: 8256318

Claim:
A system for gearing, the system comprising a toothed wheel mounted on a shaft, the wheel being pierced by channels fed with lubricant, each channel opening out to the toothed periphery of the wheel, wherein said wheel is mounted on an end portion of the shaft, so as to be capable of being rotated by said shaft, wherein said end portion is hollow so as to present an inside chamber, said chamber opening out to the outside of the shaft, via an orifice situated at an end of the shaft, and wherein said channels communicate with said chamber, the system including an injector for injecting lubricant into the chamber, the injector being situated outside the chamber, not being in contact with the shaft, and facing said orifice in such a manner as to inject the lubricant through said orifice, the lubricant penetrating into and flowing along the channels to the toothed periphery of the wheel under the effect of centrifugal force associated with rotation of the shaft, wherein the end portion of the shaft is provided with a rim which extends radially relative to an axis of rotation of the shaft and surrounds said orifice, the chamber being defined by the rim which serves to retain lubricant fluid in the chamber, and wherein the shaft is adapted to rotate around an axis of rotation, wherein each channel communicates with the chamber via an inlet orifice situated in a side wall of the chamber, and wherein said injector has an injection axis passing through the orifice and being inclined relative to the axis of rotation of the shaft towards said side wall in such a manner that the lubricant comes directly into contact with the side wall.