Motor assembly, hydraulic energy supply device, chassis system and vehicle

The utility model provides a motor assembly, a hydraulic energy supply device, a chassis system and a vehicle. The motor assembly comprises a motor controller and a motor. And the motor is connected to the outer side of the motor controller. The motor comprises a housing. A flow channel is formed in the portion, facing the motor controller, of the machine shell. According to the utility model, the flow channel is arranged at the part, facing the motor controller, of the shell of the motor, so that the heat dissipation of the motor controller is facilitated, and the operation efficiency of the motor controller is further improved.