ELECTRIC VEHICLE POWER TRANSFER DEVICE CONFIGURED TO EFFICIENTLY TRANSFER POWER AND ELECTRIC VEHICLE COMPRISING SAME

The present invention relates to an electric vehicle power transfer device and an electric vehicle comprising same. The purpose of the present invention is to provide an electric vehicle power transfer device configured to efficiently transfer power and an electric vehicle comprising same, wherein a driving motor portion and a two-stage transmission portion are integrally connected, driving power is transferred to a wheel driving shaft by a power transfer portion, and power can thus be transferred efficiently regardless of the distance between the two-stage transmission portion and wheels. The present invention comprises: a driving motor portion; a two-stage transmission portion connected to the driving motor portion; and a power transfer portion connected/installed to the two-stage transmission portion and wheels. The two-stage transmission portion comprises: a first rotating portion having a first rotating shaft to which the driving motor portion is spline-shaft-coupled, and to which a low-stage gear and a high-stage gear are connected/installed; a second rotating portion having a first transfer gear meshing with the low-stage gear of the first rotating portion, having a second transfer gear meshing with the high-stage gear thereof, and having a second rotating shaft to which the first and second transfer gears are integrally connected/installed; and a third rotating portion having a third transfer gear meshing with the second transfer gear of the second rotating portion, and having a third rotating shaft integrally connected/installed to the third transfer gear. The power transfer portion comprises: a driving rotating body connected/installed to the third rotating shaft so as to be rotated/driven integrally; a following rotating body connected/installed to a wheel shaft so as to be rotated/driven integrally; and a connecting body connected/installed to the driving rotating body and the following rotating body such that rotational driving power is transferred from the driving rotating body to the following rotating body. La présente invention se rapporte à un dispositif de transfert de puissance de véhicule électrique et à un véhicule électrique comprenant ce dernier. Le but de la présente invention est de fournir un dispositif de transfert de puissance de véhicule électrique configuré pour transférer efficacement une puissance et un véhicule électrique comprenant ce dernier, une partie de moteur d'entraînement et une partie de transmission à deux étages