Heat radiating fan

Abstract

A heat radiating fan comprises a frame body, an air-flow channel which is provided with a fixing base interconnected with the frame body by a plurality of connecting pieces, and the fixing base is axially provided with a plurality of first location holes; a first end of a first housing is radially provided with a first projecting ring lip which is provided with a plurality of second location holes corresponded with the plurality of first location holes, and a second end of the first housing is provided with a first supporting portion; a first end of a second housing is radially provided with a second projecting ring lip which is provided with a plurality of third location holes corresponded with the plurality of first location holes and the plurality of second location holes and offered to combine positioning components, and a second end of the second housing is provided with a second supporting portion; a motor arranged inside the first housing and the second housing comprises a rotor, a stator and a circuit board, wherein the rotor is provided with a rotating shaft and a magnetic element, the rotating shaft is pivoted on the first supporting portion and the second supporting portion, the magnetic element is contraposed to the stator, and the circuit board is electrically connected with the stator.

Description

technical field [0001] The invention relates to a cooling fan, in particular to a cooling fan which can be easily processed, manufactured and assembled. Background technique [0002] Please refer to figure 1 As shown, China Taiwan Publication No. 200744290 "Fan and Its Inner Rotor Motor" invention patent case, the patent case discloses a conventional cooling fan 80, the cooling fan 80 generally includes a housing 81, a stator structure 82, a The rotor structure 83 , a driving device 84 and an impeller 85 . The housing 81 is composed of a first housing 811 and a second housing 812, the first housing 811 and the second housing 812 are fixed by positioning elements 813 such as screws or rivets; the stator structure 82 has a Magnetic element 821; the rotor structure 83 has a rotating shaft 831 and a magnetic element 832, the rotating shaft 831 penetrates to the inside of the housing 81, and the rotating shaft 831 is supported by a first bearing 833 and a second bearing 834 for...

AI Technical Summary

Problems solved by technology

Since the motor housing 912 of the fan frame 91 is made of plastic injection molding, when the circuit board 94 controls the process of magnetic linkage between the stator 923 and the magnetic element 922, the motor housing 912 itself does not It is impossible to provide a magnetic effect, so it is easy to generate magnetic flux leakage. On the other hand, it will also cause the problem of electromagnetic interference, which will affect the operation efficiency of the impeller 93, thereby reducing the heat dissipation effect of the existing cooling fan 90.

Moreover, it is difficult to assemble the magnetic element 922, the stator 923, the circuit board 94, etc. inside the fan frame portion 911 and the motor housing 912.

Especially, when the fan frame 91, the motor 92 and the impeller 93 of the cooling fan 90 are larger in size, or when the fan frame 91 is made of metal material, this structure obviously cannot be used for manufacturing.

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