Electric traction axle/beam
AssigneeFpt Industrial S.P.A.
InventorsFabio Pesola, Marco Tessitore, Francesco Cantone, Pietro Esposito, Emanuele Colacito, Domenico Feola
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Abstract
An electric traction axle/beam, e-axle/e-beam, for a vehicle comprising at least one electric machine, a pair of drive shafts each connected to a respective wheel of the vehicle and a transmission chain operatively connecting the electric machine to the pair of drive shafts, the transmission chain comprising a first transfer system, a second transfer system, and a differential unit operationally interposed in series between them, the drive shafts being coaxial to a longitudinal axis of the axle, the electric machine being subtended by a parallel and separate axis of the longitudinal axis.
Claims11
An electric traction axle for a vehicle 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 a first transfer system, a second transfer system, and a differential unit operationally interposed in series between said at least one electric machine and said pair of drive shafts,
- 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 first sun gear a crown connected to a non-rotating portion of said axle and a plurality of satellites meshing between said first sun gear and said crown and connected by a carrier, said carrier being operationally connected to said differential unit,
- said electric traction axle further comprising at least one speed ratio change system operationally interposed between said first transfer system and said second transfer system,
- wherein said at least one speed ratio change system is configurable among three operating modes to connect an input shaft with one of said first sun gear or said carrier or to disconnect said input shaft with respect to said second transfer system,
- said second transfer system comprises a second sun gear, a second plurality of satellites meshing with said second sun gear, said second plurality of satellites being rigidly connected to said plurality of satellites and carried by a same carrier,
- said at least one speed ratio change system comprises a first sleeve movably carried along said axis by said input shaft and provided with toothing configured to be selectively operationally connected to respective teeth integral with said carrier and said first sun gear respectively;
- said at least one speed ratio change system comprises a second sleeve movably carried along said axis by said input shaft and provided with toothing configured to be selectively operationally connected to toothing integral with said second sun gear.
Dependencies are inferred from the claim text.