| 摘要 |
The objective of the present invention is to provide a drive device for an electric vehicle wherein, by improving the supporting structure of an input shaft of a speed reduction unit, the rotation accuracy and durability thereof are improved and noise is reduced, and the bearing rigidity of hub bearings is also improved. The drive device for an electric vehicle comprises: a speed reduction unit (12) including an input shaft (13) that is driven by an electric motor (11); a hub unit (15) that is rotated and driven by an output member (14) of the speed reduction unit (12); and a housing (16) that houses the electric motor (11) and the speed reduction unit (12). The input shaft (13) of the speed reduction unit (12) is supported by bearings (58, 59) provided at two locations in the axial direction. The drive device is constructed such that: the bearings (58, 59) provided at the two locations are both supported by the output member (14); and among hub bearings (89a, 89b) that are arranged at two locations in the axial direction of the hub unit (15), the PCD of the inboard-side hub bearing (89b) is set larger than the PCD of the outboard-side hub bearing (89a). |
