Fan device and machining method

Abstract

The invention discloses a fan device. The fan device comprises fan blades, a rotary shaft and an insert, wherein knurls are formed in one end of the rotary shaft, the end of the rotary shaft is sleeved with the fan blades, the rotary shaft is sleeved with the insert, and the insert is inlaid in the fan blades. A machining method for the fan device comprises the following steps: (1) fixing one end of the rotary shaft and the insert in an injection mold after knurling the end of the rotary shaft; and (2) carrying out injection molding in the injection mold to obtain the fan blades through injection molding forming. Because one end of the rotary shaft and the insert are fixed in the injection mold, the perpendicularity between the rotary shaft and the insert can be revised through positioning of the mold; then the fan blades are obtained by carrying out injection molding forming in the injection mold so that the insert can be inlaid in the fan blades, it is guaranteed that one end of the rotary shaft is tightly fixed to the fan blades, and good concentricity is achieved; it is guaranteed that when the rotary shaft drives the fan blades to rotate, the stability is high, noise is reduced, and the service life is prolonged; and the manufacturing process is simple, the workload of a producer is reduced, and compared with the prior art, the materials of a machine case is saved, and the cost is reduced.

Description

technical field [0001] The invention belongs to a main component and a processing method of a motor fan, in particular to a fan device and a processing method. Background technique [0002] When the conventional motor fan is assembled, the rotor shaft is usually directly riveted into the rotor casing. Since the joint area between the rotor casing and the rotating shaft is small, the bonding strength is difficult to guarantee; and then the rotor casing riveted into the rotating shaft is pressed into the In the injection molding fan blade, the connection between the rotating shaft and the fan blade is realized by matching the size of the casing and the fan blade. This assembly method is difficult to ensure the bonding strength between the rotor shaft and the fan blades, and it is difficult to guarantee the concentricity and balance of the two. The noise is relatively large during use, and the service life is affected. Contents of the invention [0003] The object of the pre...

AI Technical Summary

Problems solved by technology

[0002] When the conventional motor fan is assembled, the rotor shaft is usually directly riveted into the rotor casing. Since the joint area between the rotor casing and the rotating shaft is small, the bonding strength is difficult to guarantee; and then the rotor casing riveted into the rotating shaft is pressed into the In the injection molding fan blade, the connection between the rotating shaft and the fan blade is realized by matching the size of the casing and the fan blade

This assembly method is difficult to ensure the bonding strength between the rotor shaft and the fan blades, as well as the concentricity and balance of the two. It is very noisy during use and affects the service life.

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