| 主权项 |
1. A drive module comprising:
an electric motor; a differential assembly having a differential input member and a pair of differential output members; a multi-speed transmission assembly transmitting rotary power between the electric motor and the differential input member, the multi-speed transmission assembly comprising a housing, a two-speed planetary transmission stage, a first clutch, a second clutch and a transmission output member, the two-speed planetary transmission stage having a sun gear, a ring gear, a plurality of planet gears and a planet carrier, the sun gear being the input of the two-speed planetary stage, the planet gears being meshed with the sun gear and with the ring gear, the planet gears being rotatably mounted on the planet carrier, one of the planet carrier and the ring gear being the output of the two-speed planetary transmission stage and being drivingly coupled to the transmission output member, the first clutch being selectively operable for locking the two-speed planetary transmission stage such that it operates in a 1:1 gear ratio, the second clutch being operable for controlling rotation of the other one of the planet carrier and the ring gear, the transmission output member being meshingly engaged to the differential input member; and a pair of axle shafts, each of the axle shafts being coupled to an associated one of the differential output members for rotation therewith. |
