US Patent 11318836 Electrical bridge driving system and vehicle

An electrical bridge driving system for a vehicle includes: an electric motor; a transmission shaft connected for co-rotation with the electric motor; a first gear provided on the transmission shaft; a second gear engaged with the first gear; a planetary gear apparatus, wherein the second gear is connected for co-rotation to an input end of the planetary gear apparatus; and a differential mechanism, wherein an output end of the planetary gear apparatus is connected for co-rotation to an input end of the differential mechanism. The second gear, the planetary gear apparatus, and the differential mechanism are coaxial. The electrical bridge driving system can have a larger transmission ratio in a compact space.