A driving assembly includes a motor bracket, a first driving motor arranged on the motor bracket, a spherical crank, and a second driving motor arranged on the motor bracket and spaced apart from the first driving motor. The spherical crank includes a connecting pillar and a ball head. One end of the connecting pillar is connected with an output shaft of the first driving motor. The ball head is arranged at another end of the connecting pillar. A sphere center of the ball head is not on a rotation axis of the connecting pillar. The second driving motor includes an output shaft arranged at a first end of the second driving motor and configured to be connected with a fan blade. A second end of the second driving motor is rotatably connected with the ball head.