CAMBIO PER AUTOVEICOLI CON LUBRIFICAZIONE FORZATA DEGLI INGRANAGGI FOLLI

A gearbox for motor vehicles with forced lubrication of the idle gears comprising a grooved driving shaft carrying gears for the different speeds, rotatably supported on corresponding bushes fixed to the driving shaft, in which at least one of the gears has on one side a surface provided with an eccentrically recessed area, housing a freely rotating ring with internal toothing, which is also eccentric, a bush supporting the gear and having at one of its ends a ring gear which projects radially outwards and is coaxial with the driving shaft and which is located in the recessed area of the gear, the internal toothing of the ring and the ring gear forming a chamber which is divided into two parts, for intake and delivery, by a sector projecting into the recessed area from the gear, a flat cover element being provided facing the recessed area, the intake part of the chamber being connected by a channel to the opposite surface of the gear and the delivery part of the chamber being connected by a passage to the inside of the bush.