Electric drive assembly system and vehicle

The present disclosure relates to an electric drive assembly system comprising an electric machine (100) comprising a motor shaft (10) rotating about an axis of rotation (X), a reduction gearbox (200) coupled to the electric machine (100), the reduction gearbox (200) comprising an input shaft (20) rotationally coupled with the motor shaft (10). A circumferential groove (1) is provided at the coupling region of the motor shaft (10) and the input shaft (20), the motor shaft (10) comprising a first radial through-hole (12) in fluid communication with the circumferential groove (1), and the input shaft (20) comprising a second radial through-hole (22) in fluid communication with the circumferential groove (1). The first radial through hole (12) and the second radial through hole (22) are located in the two radial sides of the circumferential groove (1) respectively. The invention further relates to a vehicle. The vehicle comprises the electric drive assembly system. 本公开涉及一种电驱动总成系统，包括：电机(100)，包括绕旋转轴线(X)旋转的电机轴(10)，