POWER ASSEMBLY AND AUTOMOBILE

A powertrain includes a motor, a reducer, and an elastic component. The reducer includes an input shaft, the motor includes an output shaft, the input shaft is coaxially coupled to the output shaft, a coupling end of the input shaft includes a first limiting platform and a first coupling surface, and a coupling end of the output shaft includes a second limiting platform and a second coupling surface. The first coupling surface and the second coupling surface are disposed opposite to each other along a radial direction of the input shaft, and the first coupling surface is in contact with the second coupling surface, so that the output shaft is in transmission connection with the input shaft. The first limiting platform and the second limiting platform are disposed opposite to each other along an axial direction of the input shaft. The elastic component is fastened between the first limiting platform and the second limiting platform. The first limiting platform and the second limiting platform are disposed opposite to each other along the axial direction of the input shaft, and the elastic component is disposed between the first limiting platform and the second limiting platform. The elastic component allows the motor to move axially in an operation process. Compared with a manner in which inner and outer rings of a bearing of a fixed motor are completely fastened, this reduces an assembly requirement of the motor and a design requirement of a housing