Fan driving mechanism and spraying device

The utility model provides a fan driving mechanism and a spraying device. The fan driving mechanism comprises a driving shaft, a mounting disc, at least one driving shoe, at least one return spring, a driven hub and a fan, the driving shaft is sleeved with the mounting disc, one end of the driving shoe is hinged to the end face of one end of the mounting disc, one end of the return spring is connected with the end face of one end of the mounting disc, and the other end of the return spring is connected with the driving shoe. The driven hub is rotationally arranged on the driving shaft in a sleeving mode, the driving hoof is located in the driven hub, and the fan is installed on the driven hub. When the fan works, the rotating speed of the driving shaft meets the requirement, the liquid medicine atomization quality and effect are guaranteed, and the spraying distance requirement is guaranteed. And the fan is stably started, and the starting load and the starting impact are reduced. Rotation of the fan during i