Electric traction axle/beam

An electric traction axle/beam, e-axle/e-beam, for a vehicle, said e-axle/e-beam comprising at least one electric machine, a pair of drive shafts and a transmission chain operatively connecting said at least one electric machine to said pair of drive shafts,

• said transmission chain comprising operationally interposed in series between said at least one electric machine and said pair of drive shafts a first transfer system, a second transfer system and a differential unit,
• said drive shafts being coaxial to a longitudinal axis of said axle, said electric machine insisting on an axis parallel and distinct from said longitudinal axis,
• wherein said second transfer system is of the epicyclic type, comprising a sungear, a crown connected to a portion of said axle and a plurality of satellites meshing between said sungear and said crown and connected by a carrier, said carrier being operationally connected to said differential unit,
• said e-axle/e-beam further comprising at least one speed ratio change system operationally interposed between said first transfer system and said second transfer system,
• wherein said speed ratio change system is configured to connect said input shaft with one of said sungear or said carrier or to disconnect said input shaft with respect to said second transfer system,
• wherein said speed ratio change system comprises a first sleeve carried movably along said axis by said input shaft and provided with toothing configured to be selectively operationally connected to respective toothing integral with said carrier and said sungear respectively, and
• wherein said first sleeve is coaxial to said axis.