CN102691667B - Fan structure - Google Patents

Abstract

The invention discloses a fan structure comprising a fan frame, a base, a stator, a rotor, a dustproof cover and an impeller. The base is arranged in the fan frame; an annular wall is arranged at the outer edge of the base; the stator is arranged on the base; the annular wall surrounds the stator; the rotor is arranged correspondingly to the stator and a magnetic force is generated by the rotor and the stator; the dustproof cover is connected with the annular wall; the annular wall and the dustproof wall surround the stator and the rotor; and the impeller is coupled with the rotor.

Description

Fan structure

Technical field

The present invention relates to a kind of fan structure, particularly relate to a kind of fan structure that effectively can stop dust foreign body intrusion.

Background technique

In general, in order to fan will be made to have dust-proof effect, design the foreign matters such as the next anti-blocking dust in complicated path often therein and enter, to guarantee fan running quality in the presence of a harsh environment.

Refer to Fig. 1, among existing fan structure 1, fan frame 10 and impeller 60 enter to stator 30 place and/or bearing 20 place by intercepting dust to the mode of inserting each other.More specifically, fan frame 10 and impeller 60 are that the protuberance 12 by fanning frame 10 pedestal 11 is put inserting with the ring portion 62 that impeller 60 extends respectively, as shown in the region A of Fig. 1, to intercept circuit board 31 place and/or bearing 20 place that dust enters to stator 30, and then circuit board 31 and/or bearing 20 is avoided to be damaged.

But fan structure 1 can have some shortcomings.First, impeller 60 must keep enough gaps with fan frame 10 in the running.Therefore, may interference phenomenon be caused to the fan frame 10 (or ring wall 12) that inserting is put with impeller 60 (or ring portion 62), and then cause fan structure 1 that the abnormal situation of running occurs.Moreover to fan frame 10 and impeller 60, to inserting, to intercept the path that dust invades be not very complicated each other due to this kind, therefore a small amount of or more tiny dust still can invade circuit board 31 place to stator 30 and/or bearing 20 place.Therefore, the dust-proof effect that fan structure 1 can be reached can be very limited.

Summary of the invention

The present invention adopts feature as detailed below with in order to solve the above problems substantially.That is, a fan frame, a pedestal, a stator, a rotor, a dust cover and an impeller is comprised according to fan of the present invention.Pedestal is arranged in fan frame, the outer rim of pedestal has a ring wall, stator is arranged on pedestal, and this ring wall is around stator, and rotor corresponds to stator and arranges, and mutually produce magnetic force with stator, dust cover is connected to ring wall, and wherein this ring wall and this dust cover are around this stator and this rotor, and this impeller is coupled in rotor, and the coated stator of this impeller and rotor, this impeller drives it to rotate by rotor.

Wherein this impeller more comprises a barricade, and barricade is arranged relative to dust cover, and has gap between barricade and dust cover; This impeller comprises a wheel hub and multiple flabellum, it is peripheral that the plurality of flabellum is set around this wheel hub, this barricade is extended by the direction of this wheel hub to this rotor, one end of this barricade connects this wheel hub, the other end extends downward above this rotor, and have gap between this rotor, this dust cover and this barricade are all annular, and the setting that corresponds to each other.

Have a gap between rotor and impeller, the ring wall of pedestal is arranged at the gap between rotor and impeller.One end of dust cover connects ring wall in the side direction of rotor, and the other end extends to the top of rotor, and dust cover and ring wall are the component be separated, and goodly connects with mutual snap fit.

Rotor is better comprises a rotating shaft, an iron-clad and is arranged at magnet ring in iron-clad.Have a central siphon in stator, rotating shaft is sheathed in central siphon in a rotating manner, and stator is arranged between central siphon and ring wall, has at least one bearing in this central siphon, and in order to accept this rotating shaft, this central siphon is arranged at this base central, is formed in one with this pedestal.In addition, this fan frame, this pedestal and this ring wall are preferably one-body molded.

Meanwhile, according to fan structure of the present invention, more comprise a binding member, be arranged between this rotating shaft and this iron-clad, fix this rotating shaft and this iron-clad in order to combine, this iron-clad is preferably around this stator exterior.

The better mode shaping with plastic-injection of this binding member takes shape between this rotating shaft and this rotor, and this impeller is connected to this rotor by this binding member.

This binding member has a column, and this impeller has more a joining hole, and this column is connected to this impeller through this joining hole, and this column is better is fused to this joining hole.

For making above-mentioned purpose of the present invention, feature and advantage become apparent, preferred embodiment cited below particularly also coordinates appended accompanying drawing to elaborate.

Accompanying drawing explanation

Fig. 1 is the generalized section showing a kind of existing fan structure;

Fig. 2 is the generalized section showing fan structure of the present invention; And

Fig. 3 is the decomposing schematic representation of display according to Fig. 2.

Primary component symbol description

1,100 ~ fan structure

10,110 ~ fan frame

11,111 ~ pedestal

12 ~ protuberance

20,120 ~ bearing

30,130 ~ stator

31,131 ~ circuit board

60,180 ~ impeller

62 ~ ring portion

112 ~ ring wall

113 ~ central siphon

140 ~ rotating shaft

151 ~ iron-clad

152 ~ magnet ring

160 ~ binding member

161 ~ column

170 ~ annular dust cover

181 ~ circular retaining wall

182 ~ joining hole

183 ~ flabellum

184 ~ wheel hub

Embodiment

Hereby coordinate accompanying drawing that preferred embodiment of the present invention is described.

Refer to Fig. 2 and Fig. 3, the fan structure 100 of the present embodiment mainly includes fan frame 110, pedestal 111, stator 130, rotor, dust cover 170 and an impeller 180.Rotor is better to be comprised rotating shaft 140, iron-clad 151 and and is arranged at magnet ring 152 in iron-clad 151.Have a central siphon 113 in stator 130, stator 130 is arranged between central siphon 113 and ring wall 112, has at least one bearing in this central siphon, and in order to accept this rotating shaft, at this, bearing 120 can be the form of an oil-impregnated bearing or a ball bearing.This central siphon 113 is arranged at this pedestal 111 central authorities, can be separating member or one-body molded with this pedestal 111.In addition, this fan frame 110, this pedestal 111 and this ring wall 112 are preferably one-body molded.

Pedestal 111 is arranged in fan frame 110, the outer rim of pedestal 111 has a ring wall 112, stator 130 is arranged on pedestal 111, this ring wall 112 is around stator 130, rotating shaft 140 is sheathed in stator 130 in a rotating manner, rotor corresponds to stator 130 and arranges, and mutually produce magnetic force with stator 130, dust cover 170 is connected to ring wall 112, wherein this ring wall 112 and this dust cover 170 are around this stator 130, this magnet ring 152 and this iron-clad 151, this impeller 180 is coupled in this rotor, and the coated stator 130 of this impeller 180 and rotor, this impeller 180 drives it to rotate by rotor.

Wherein this impeller 180 more comprises a barricade 181, and barricade 181 is arranged relative to dust cover 170, and has gap between barricade 181 and dust cover 170; This impeller 180 comprises a wheel hub 184 and multiple flabellum 183 being connected to wheel hub 184, it is peripheral that the plurality of flabellum 183 is set around this wheel hub 184, this barricade 181 is extended by the direction of this wheel hub 184 to the iron-clad 151 of rotor, one end of this barricade 181 connects this wheel hub 184, the other end extends downward above the iron-clad 151 of rotor, and have gap between iron-clad 151, this dust cover 170 and this barricade 181 are all annular, and the setting that corresponds to each other.

Have a gap between rotor iron-clad 151 and impeller 180, the ring wall 112 of pedestal 111 upwards extends around this pedestal 111, and is arranged at the gap between rotor iron-clad 151 and impeller 180.One end of dust cover 170 connects ring wall 112, and the other end extends to the top of rotor, and dust cover 170 is connected with snap fit with ring wall 112 is better.

Iron-clad 151 is connected to rotating shaft 140 by binding member 160.In other words, binding member 160 takes shape between rotating shaft 140 and iron-clad 151, with in conjunction with fixed rotating shaft 140 and iron-clad 151.It should be noted that among the present embodiment, binding member 160 can the shaping mode of plastic-injection take shape between rotating shaft 140 and iron-clad 151.

In addition, impeller 180 is also be connected to rotor by binding member 160, binding member 160 has multiple column 161, impeller 180 has multiple joining hole 182 (as shown in Figure 3), and the column 161 of binding member 160 is through the joining hole 182 of impeller 180 and is connected to impeller 180 (as shown in Figure 2).Then, column 161 can be fused to joining hole 182, to reach the linking steady character between rotor and impeller 180.

As mentioned above, ring wall 112 and dust cover 170 are round bearing 120, stator 130 and rotor, and collocation is toward the barricade 181 of downward-extension, make the path entering stator more roundaboutization of the foreign matters such as dust, thus can intercept circuit board 131 place and/or bearing 120 place that the foreign matters such as extraneous dust enter stator 130, be damaged to avoid circuit board 131 and/or bearing 120.

In addition, the fan structure 100 disclosed by the present embodiment is except can having excellent dust-proof effect, and it can also have other advantage.For example, because binding member 160 can the shaping mode of plastic-injection take shape between rotating shaft 140 and rotor, therefore rotating shaft 140 can be quite excellent with the running balance effect of rotor.In addition, because fan structure 100 is binding members 160 of utilizing plastic-injection shaping in conjunction with rotating shaft 140, rotor and impeller 180, therefore the entirety of fan structure 100 manufactures instinct is lowered.In addition, among the fan structure 100 disclosed by the present embodiment, the interference phenomenon between fan frame 110 and impeller 180 can be avoided.In other words, fan structure 100 can keep smooth operation while having excellent dust-proof effect.

Although disclose the present invention in conjunction with above preferred embodiment; but itself and be not used to limit the present invention, be anyly familiar with this operator, without departing from the spirit and scope of the present invention; can do a little change and retouching, what therefore protection scope of the present invention should define with the claim of enclosing is as the criterion.

Claims (14)

1. a fan, comprising:

Fan frame;

Pedestal, be arranged in this fan frame, the outer rim of this pedestal has a ring wall;

Stator, is arranged on this pedestal;

Rotor, is arranged corresponding to this stator, and mutually produces magnetic force with this stator, the magnet ring that this rotor comprises rotating shaft, iron-clad and is arranged in iron-clad;

Dust cover, is connected to this ring wall, and wherein this ring wall and this dust cover are around this stator and this rotor;

Impeller, is coupled in this rotor; And

Binding member, is arranged between this rotating shaft and this iron-clad, and fix this rotating shaft and this iron-clad in order to combine, this binding member has column, and this impeller also has joining hole, and this column is connected to this impeller through this joining hole.

2. fan structure as claimed in claim 1, wherein this impeller also comprises barricade, and this barricade arranges relative to this dust cover, and have gap between this barricade and this dust cover.

3. fan structure as claimed in claim 2, wherein this impeller comprises wheel hub and multiple flabellum, and it is peripheral that the plurality of flabellum is set around this wheel hub, and this barricade is extended by the direction of this wheel hub to this rotor.

4. fan structure as claimed in claim 3, wherein one end of this barricade connects this wheel hub, and the other end extends downward above this rotor, and has gap between this rotor.

5. fan structure as claimed in claim 2, wherein this dust cover and this barricade are the corresponding setting of annular.

6. fan structure as claimed in claim 1, wherein have a gap between this rotor and this impeller, this ring wall of this pedestal is arranged at this gap between this rotor and this impeller.

7. fan structure as claimed in claim 6, wherein one end of this dust cover connects this ring wall in the side direction of this rotor, and the other end extends to the top of this rotor.

8. fan structure as claimed in claim 7, wherein this dust cover and this ring wall are the component be separated, and connect with snap fit.

9. fan structure as claimed in claim 1, wherein has central siphon in this stator, has at least one bearing in this central siphon, in order to accept this rotating shaft.

10. fan structure as claimed in claim 1, wherein this central siphon is arranged at this base central, is formed in one with this pedestal.

11. fan structures as claimed in claim 1, wherein this binding member takes shape between this rotating shaft and this iron-clad in the mode that plastic-injection is shaping.

12. fan structures as claimed in claim 1, wherein this impeller is connected to this rotor by this binding member.

13. fan structures as claimed in claim 12, wherein this column is fused to this joining hole.

14. fan structures as claimed in claim 1, wherein this fan frame, this pedestal and this ring wall are formed in one.