Gearbox for an electric powertrain

An electric powertrain for a vehicle, comprising at least one electric motor and a gearbox for transmitting a motor torque to at least one drive shaft, the gearbox for an electric powertrain, the gearbox comprising:

• a primary shaft, on which are arranged a first primary gear which is fixed in rotation with respect to the primary shaft, a second primary gear and a third primary gear;
• a secondary shaft, on which are arranged a first secondary gear that is meshing with the first primary gear and that is by default free to rotate around the secondary shaft, a second secondary gear meshing with the second primary gear and a third secondary gear meshing with the third primary gear;
• a first coupling member, which is arranged along the secondary shaft and which can be moved between:
• an engaged position, in which it couples the first secondary gear in rotation with the secondary shaft;
• and
• a neutral position, in which the first secondary gear can rotate around the secondary shaft;
• and
• a second coupling member, which is arranged along one shaft among the primary and secondary shafts and which is movable between:
• a first position in which it couples one of the second and third gears in rotation with the one shaft;
• a second position in which it couples the other of the second and third gears in rotation with the one shaft;
• and
• a neutral position in which the second and third gears can rotate around the one shaft;
• wherein the electric motor comprises a motor shaft on which is arranged a pinion meshing with the first primary gear of the primary shaft.

An electric powertrain for a vehicle, comprising at least one electric motor and a first gearbox for transmitting a motor torque to at least one drive shaft, the first gearbox comprising:

• a primary shaft, on which are arranged a first primary gear which is fixed in rotation with respect to the primary shaft, a second primary gear and a third primary gear;
• a secondary shaft, on which are arranged a first secondary gear that is meshing with the first primary gear and that is by default free to rotate around the secondary shaft, a second secondary gear meshing with the second primary gear and a third secondary gear meshing with the third primary gear;
• a first coupling member, which is arranged along the secondary shaft and which can be moved between:
• an engaged position, in which it couples the first secondary gear in rotation with the secondary shaft;
• and
• a neutral position, in which the first secondary gear can rotate around the secondary shaft;
• and
• a second coupling member, which is arranged along one shaft among the primary and secondary shafts and which is movable between:
• a first position in which it couples one of the second and third gears in rotation with the one shaft;
• a second position in which it couples the other of the second and third gears in rotation with the one shaft;
• and
• a neutral position in which the second and third gears can rotate around the one shaft;
• wherein the electric powertrain comprises another electric motor, arranged to provide an additional torque to the at least one drive shaft, via a separate second gearbox, the second gearbox comprising a dedicated input shaft, the secondary shaft being common to the first gearbox and the second gearbox.