Dustproof oil throwing prevention fan

The utility model discloses a dustproof oil throwing prevention fan which comprises a fan frame and fan blades. The fan frame is internally provided with an inner fan frame. The fan blades are provided with a fan blade assembly. The fan frame is connected with the fan blades through the inner fan frame and the fan blade assembly in a sleeved mode. The inner fan frame and the fan blade assembly are internally and sequentially provided with an iron shell, a rubber magnet, an upper wire frame, a silicon steel sheet, a lower wire frame, a PCB, a middle fan frame tube, an oil bearing and a central spindle. The middle fan frame tube is arranged inside the fan frame. The middle fan frame tube is sleeved with the upper wire frame, the silicon steel sheet, the lower wire frame and the PCB. The central spindle and the oil bearing are in insertion connection and are arranged inside the middle fan frame tube. The central spindle is connected with the fan blade assembly in an abutting mode. A blade type gear is arranged on the periphery of the position, connected with the central spindle, of the fan blade assembly. According to the dustproof oil throwing prevention fan, outside dust or foreign bodies are prevented from entering a bearing area, lubricating oil inside the oil bearing is effectively prevented from overflowing, the lubricating effect of the fan is improved, noise of the fan is reduced, and the service life of the dustproof oil throwing prevention fan is prolonged.