Two speed gear reducer for electric drive module

An electric drive module (EDM) for an electrified vehicle, the EDM having a housing, an electric motor and a two-speed gearbox assembly, the two-speed gearbox assembly comprising:

• one compound planetary gear set including a sun gear, a ring gear and a single planetary carrier having compound planetary gears each including a first gear in meshing engagement with the sun gear and a second gear in meshing engagement with the ring gear;
• an input shaft connected to the sun gear and coupled to an output of the electric motor;
• a first torque transfer device configured to be controlled to selectively couple the carrier to the input shaft;
• a second torque transfer device configured for selectively coupling the carrier to the housing;
• an output shaft;
• first and second fixed gear reduction gearsets;
• the second fixed gear reduction gearset being a final drive gearset and coupling the output shaft of the two-speed gearbox assembly to a differential of the electrified vehicle, the second fixed gear reduction gearset having a first reduction gear fixed to the output shaft and a second reduction gear in meshing engagement with the first reduction gear and coupled to the differential;
• and
• a park lock gear directly connected to the output shaft of the two-speed gearbox assembly upstream of the second fixed gear reduction gearset;
• wherein the ring gear is connected to the output shaft of the two-speed gearbox assembly;
• wherein the input shaft and the output shaft are both offset from and parallel to one or more axles of the vehicle that are coupled to the differential;
• wherein the EDM is selectively switchable among (i) a first gear mode where the first torque transfer device is disengaged and the second torque transfer device is engaged grounding the carrier to the housing;
• and (ii) a second gear mode where the second torque transfer device is disengaged and the first torque transfer device is engaged to couple for common rotation the carrier and the sun gear;
• wherein the input shaft and the output shaft of the two-speed gearbox assembly are concentric;
• and
• wherein an inner end of the input shaft is rotatable supported by an adjacent inner end of the output shaft of the two-speed gearbox assembly.