Display screen rotating device, display screen assembly and vehicle

The utility model relates to a display screen rotating device, a display screen assembly and a vehicle, the display screen rotating device comprises a motor module, and the output end of the motor module is a first worm; the damping rotating shaft comprises a first shaft section and a second shaft section which can rotate relatively and have damping torque, the first shaft section is connected with an input gear meshed with the first worm, and the lead angle of the first worm is smaller than the equivalent friction angle between meshing gear teeth of the first worm and the input gear; the second shaft section is connected with an output gear; and the rotating mechanism is used for being fixedly connected to a display screen and is provided with a tooth part meshed with the output gear. Thus, by arranging the damping rotating shaft, the display screen can be stopped at any position in the manual mode, and the problem that the display screen rotating device cannot be used under the condition that the electric m