CN2358256Y - Double-rotor brushless dc fan - Google Patents
Double-rotor brushless dc fan Download PDFInfo
- Publication number
- CN2358256Y CN2358256Y CN 98248231 CN98248231U CN2358256Y CN 2358256 Y CN2358256 Y CN 2358256Y CN 98248231 CN98248231 CN 98248231 CN 98248231 U CN98248231 U CN 98248231U CN 2358256 Y CN2358256 Y CN 2358256Y
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- fan
- rotor
- internal rotor
- utility
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Abstract
The utility model relates to a double-rotor brushless DC fan, which is composed of a frame, a circuit board, a stator, two positioning sheets, an inner rotor, an outer rotor, and a fan, wherein, a middle ring body of the fan is provided with the outer rotor; a spindle of the fan is provided with the inner rotor; the outer rotor is positioned at the outer circumference of the stator; the inner rotor is penetrated in a stator bore. When the fan runs, the outer rotor which is driven by the stator with magnetic force runs, and meanwhile, the inner rotor which rotates is driven, and the torsional force of rotation of the fan can be enhanced; when the inner rotor runs, the utility model is supported by the magnetic force, so mechanical friction hardly exists when the stator and the inner rotor run, so noises can not be generated, the manufacture of the utility model is simple, the size is minimized corresponding to the sizes of components, such as the stator, the outer rotor, etc., and the area for heat radiation of fan blades can be enhanced.
Description
The utility model relates to the ventilation plant in a kind of field air conditioning of ventilating, but particularly relate to a kind ofly rotate that torsion is big, low noise, heat radiation function is good and motor volume minimizing has practicability double rotor brushless DC fan.
Fan is a kind of common cooling and radiating structure, it mainly is to be installed in the middle of electronics or the electric machine assembly, and make fan blade running by magnetic energy, the heat temperature that produces with electronics or electric machine assembly running action the time derives, reach heat radiation and cooling purpose, impaired to avoid electronics or electric machine assembly Yin Gaowen.
See also Fig. 1, shown in Figure 2, general existing traditional fan, the central authorities of its framework 10 are the containing groove 101 that runs through, containing groove 101 bottoms have supporting base 102, supporting base 102 is to join with pole with the inner circumference edge of containing groove 101, be provided with card again in the central authorities of supporting base 102 and choose a place to give a banquet 103, choose a place to give a banquet 103 central authorities of this card are a perforation 104, stator 12 outer periphery are arranged with coil, its central authorities then are provided with an endoporus 121, two pole pieces 13 can be installed in respectively stator 12 on, below, and its outer periphery are corresponding projection and are provided with two tabs 132, and be provided with mesopore 131 in the central, circuit board 11 and stator 12 are installed on the axle sleeve 14 in regular turn, make axle sleeve 14 be installed in card again and choose a place to give a banquet in 103 the perforation 104, and be equiped with two bearings 15 in the axle sleeve 14,16 in fan can its axle 161 and is installed in the bearing 15.
Turn round because the existing traditional fan of this kind is the magnetic force of 17 of rotors by stator 12 and fan 16, so the power resources of this fan rotation are the magnetic thrust that only comes from 12 pairs of rotors 17 of stator, the torsion of its fan rotation is quite limited; Moreover, owing to be equiped with bearing 15 between the axle 161 of fan and the axle sleeve 14, frictional loss when rotating to lower fan, but the noise that this ball bearing 15 is produced in the running is quite big, and limited by the size condition of bearing, make the members such as axle sleeve 14, stator 12 and rotor 17 of fan can't make less size, the blade area of fan is reduced, reduce the effect of heat radiation.This shows that above-mentioned existing fan structure still has many defectives, and the assistant officer waits to be improved.
Because the defective that above-mentioned existing fan exists, the design people actively study innovation based on abundant practical experience and professional knowledge, through constantly studying, design, and after studying sample and improvement repeatedly, creates the utility model finally.
Main purpose of the present utility model is, overcomes the defective that existing fan exists, and a kind of double rotor brushless DC fan of new structure is provided, and makes it have that the torsion of rotation is big, noise is low, heat radiation function is good, and the effect that the motor volume can minimizing.
The purpose of this utility model is to be realized by following technological scheme.According to a kind of double rotor brushless DC fan that the utility model proposes, it is by framework, circuit board, stator, two location pieces, internal rotor, external rotor and fan are formed, framework central authorities are provided with the containing groove that runs through, the central authorities of containing groove are provided with a card with rod rest and choose a place to give a banquet, circuit board and stator are fixedly arranged on card chooses a place to give a banquet, the middle ring body outer periphery extension of fan is provided with several blades, its inside then is equiped with an axle, the inner circumference edge of ring body is installed with one group and is the external rotor that is positioned at the stator outer periphery and can turns round by magnetic force therebetween after establishing in addition, it is characterized in that: be installed with one group on the above-mentioned axle and be the internal rotor that the endoporus that is arranged in stator and the magnetic force by therebetween turn round after establishing, have the gap between the endoporus of this internal rotor and stator, and on it, under stator inner hole in the cover be installed with the location internal rotor location piece.
The purpose of this utility model can also further realize by following technical measures.
Aforesaid double rotor brushless DC fan, wherein said stator in it hole peripheral be and equidistantly be provided with the even number road and be axial dividing strip, and stator is respectively equipped with a pole piece up and down, the outer periphery of pole piece are corresponding projection and are provided with the outer tab of even number, and its central authorities are mesopore, this mesopore is to extend axially corresponding to outer tab position and is provided with tab, and the tab of two pole pieces is sheathed on respectively in the endoporus of stator, and four tabs are staggered and are fastened between each dividing strip.
Aforesaid double rotor brushless DC fan, wherein said stator in it hole peripheral be and equidistantly be provided with the even number road and be axial grooving.
The utility model compared with prior art has tangible advantage and good effect.By above technological scheme as can be known, the utility model is that the middle ring body at fan is provided with external rotor, the axle of fan is provided with internal rotor, external rotor is positioned at the outer periphery of stator, internal rotor is arranged in the endoporus of stator, fan in the running, stator can magnetic force promotes the external rotor running, can promote simultaneously internal rotor again and rotate, and can improve the torsion that fan rotates; Moreover the internal rotor running time is to be supported by magnetic force, so stator and internal rotor almost do not have mechanical friction in the running, thus can not produce noise, and also its manufacturing is comparatively simple, relatively can be with the size minimizing of members such as stator, external rotor, and can improve the heat diffusion area of fan blade.By above-mentioned structural design, make the utility model double rotor brushless DC fan have following advantage:
1, rotation torsion is big:
Because stator of the present utility model is to promote external rotor and internal rotor rotation with magnetic force simultaneously, so fan can obtain bigger rotation torsion in the running.
2, low noise:
Because the utility model is to be equiped with internal rotor between the axle of fan and stator, and has the magnetic thrust again between internal rotor and the stator, internal rotor is to be supported by magnetic force again, so make fan can not produce noise in the running.
3, volume minimizing, heat radiation function are good:
Because inner rotor core of the present utility model is simple, easy to manufacture, so can be made into less Dimensions, but also minimizing of the relative size that makes members such as stator, external rotor, and then the size that can dwindle motor, and the area of increasing fan blade, and can increase radiating efficiency.
In sum, it has the utility model and rotates that torsion is big, noise is low, heat radiation function is good, and the motor volume can minimizing effect, no matter it structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Concrete structure of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Fig. 1 is the exploded perspective schematic representation of existing conventional fan structure.
Fig. 2 is the generalized section of conventional fan composite structure.
Fig. 3 is the exploded perspective schematic representation of first kind of structure kenel of the utility model.
Fig. 4 is the composite structure generalized section of first kind of structure kenel of the utility model.
Fig. 5 is the exploded perspective schematic representation of second kind of structure kenel of the utility model.
Fig. 6 is the composite structure generalized section of second kind of structure kenel of the utility model.
Below in conjunction with accompanying drawing and preferred embodiment, to according to its concrete structure of double rotor brushless DC fan, feature and the effect thereof that the utility model proposes, describe in detail as after.
See also Fig. 3, shown in Figure 4, the utility model double rotor brushless DC fan, it is made up of a framework 20, a circuit board 21, a stator 22, two pole pieces 23, two location pieces 25, an internal rotor 24, an external rotor 27 and a fan 26, wherein:
This framework 20, its central authorities are provided with the containing groove 201 that runs through, and the bottom in the containing groove 201 is provided with a supporting base 202, and supporting base 202 is to be provided with pole being connected with the inner circumference edge of containing groove 201, the central authorities of supporting base 202 are provided with card again and choose a place to give a banquet 203, and choose a place to give a banquet 203 central authorities of card are a perforation 204;
This circuit board 21 can overlap to set firmly and places card to choose a place to give a banquet on 203;
This stator 22, its outer periphery are arranged with coil, and central authorities then are provided with an endoporus 221, and the periphery of this endoporus 221 is and equidistantly is provided with the axial dividing strip in four roads 222;
This pole piece 23, its outer periphery are corresponding projection and are provided with two outer tabs 232, and its central authorities are a mesopore 231, and mesopore 231 is to extend axially corresponding to outer tab 232 positions and is provided with tab 233, two pole pieces 23 are for being sheathed in the endoporus 221 by the both sides of stator 22 respectively by its tab 233, and make four tabs 233 be staggered 222 of each dividing strips that are fastened in, then again stator 22 covers are fixed in card and choose a place to give a banquet on 203;
This location piece 25, cover is fixed in 222 of each dividing strips of endoporus 221 two side ends of stator 22, and 25 of two location pieces are placed again and are provided with an internal rotor 24;
This internal rotor 24,221 of the endoporus of itself and stator 22 also have the gap, after the axle 262 of fan 26 wore location piece 25, and are fixed structure with internal rotor 24.
This external rotor 27, the inner circumference edge of ring body 261 in the form of a ring and in can corresponding being fixedly arranged on;
This fan 26 is provided with ring body 261 in, and the outer periphery of middle ring body 261 have extended to form several blades, and its inside then is equiped with an axle 262.
During fan 26 runnings, stator 22 can promote external rotor 27 runnings with magnetic force by the outer tab 232 of pole piece 23, tab 233 that again can pole piece 23 and promote internal rotor 24 with magnetic force and rotate simultaneously, so internal rotor 24 except the function with the surface friction drag that can reduce 221 of axle 262 and stator 22 endoporus, more can promote the torsion that fan 26 rotates; Moreover, because internal rotor 24 of the present utility model is supported by magnetic force, almost there is not mechanical friction, so can not produce noise, and its manufacturing is comparatively simple, so the size minimizing of members such as stator 22, internal rotor 24, external rotor 27 relatively can be able to be improved the heat diffusion area of fan blade.
See also Fig. 5 and shown in Figure 6, be another kind of structure kenel of the present utility model, it is made up of a framework 30, a circuit board 31, a stator 32, two location pieces 34, an internal rotor 33, an external rotor 36 and a fan 35, wherein:
This framework 30, central authorities are provided with the containing groove 301 that runs through, and the bottom in the containing groove 301 is provided with a supporting base 302, and supporting base 302 is to be provided with pole being connected with the inner circumference edge of containing groove 301, the central authorities of supporting base 302 are provided with card again and choose a place to give a banquet 303, and choose a place to give a banquet 303 central authorities of card are a perforation 304;
This circuit board 31 can overlap and is fixedly arranged on card and chooses a place to give a banquet on 303;
This stator 32, central authorities are provided with an endoporus 321, and the periphery of endoporus 321 is and equidistantly is provided with the axial grooving in four roads 322;
This fan 35 is provided with ring body 351 in, and the outer periphery of middle ring body 351 extend to form and are provided with several blades, and its inside then is equiped with an axle 352;
This external rotor 36, the inner circumference edge of ring body 351 in the form of a ring and in can corresponding being fixedly arranged on;
This location piece 34, cover sets firmly endoporus 321 two side ends that place stator 32, and 34 of two location pieces are placed again and are provided with an internal rotor 33;
This internal rotor 33,321 of the endoporus of itself and stator 32 also have the gap, after the axle 352 of fan 35 wore location piece 34, and are fixed structure with internal rotor 33.
During fan 35 runnings, stator 32 can promote external rotor 36 runnings with magnetic force by the pole piece of its outer periphery, can promote internal rotor 33 rotations with each magnetic pole of setting that grooving 322 is separated with magnetic force in stator 32 endoporus 321 again simultaneously, so this internal rotor 33 except the surface friction drag function with 321 of endoporus that reduce axle 352 and stator 32, more can promote the torsion of fan 35 rotations; Moreover, because internal rotor 33 of the present utility model is to be supported by magnetic force in the running, can not produce noise so almost have mechanical friction, and its manufacturing is comparatively simple, can corresponding automatic batch production design, and the size minimizing of members such as stator 32, internal rotor 33, external rotor 36 relatively can be able to be improved the heat diffusion area of fan blade.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (3)
1, a kind of double rotor brushless DC fan, it is made up of framework, circuit board, stator, two location pieces, internal rotor, external rotor and fan, framework central authorities are provided with the containing groove that runs through, the central authorities of containing groove are provided with a card with rod rest and choose a place to give a banquet, circuit board and stator are fixedly arranged on card chooses a place to give a banquet, the middle ring body outer periphery extension of fan is provided with several blades, its inside then is equiped with an axle, the inner circumference edge of ring body is installed with one group and is the external rotor that is positioned at the stator outer periphery and can turns round by magnetic force therebetween after establishing in addition, it is characterized in that:
Be installed with one group on the above-mentioned axle and be the internal rotor that the endoporus that is arranged in stator and the magnetic force by therebetween turn round after establishing, have the gap between the endoporus of this internal rotor and stator, and cover is installed with the location piece of location internal rotor in its upper and lower stator inner hole.
2, double rotor brushless DC fan according to claim 1, it is characterized in that described stator in it hole peripheral be and equidistantly be provided with the even number road and be axial dividing strip, and stator is respectively equipped with a pole piece up and down, the outer periphery of pole piece are corresponding projection and are provided with the outer tab of even number, and its central authorities are mesopore, this mesopore is to extend axially corresponding to outer tab position and is provided with tab, and the tab of two pole pieces is sheathed on respectively in the endoporus of stator, and four tabs are staggered and are fastened between each dividing strip.
3, double rotor brushless DC fan according to claim 1, it is characterized in that described stator in it hole peripheral be and equidistantly be provided with the even number road and be axial grooving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98248231 CN2358256Y (en) | 1998-11-13 | 1998-11-13 | Double-rotor brushless dc fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98248231 CN2358256Y (en) | 1998-11-13 | 1998-11-13 | Double-rotor brushless dc fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2358256Y true CN2358256Y (en) | 2000-01-12 |
Family
ID=33993290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98248231 Expired - Fee Related CN2358256Y (en) | 1998-11-13 | 1998-11-13 | Double-rotor brushless dc fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2358256Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353650C (en) * | 2003-04-29 | 2007-12-05 | 建准电机工业股份有限公司 | Brushless DC motor |
| CN101487478B (en) * | 2008-01-15 | 2012-06-13 | 台达电子工业股份有限公司 | Fan and its inner rotor motor |
| CN101512876B (en) * | 2006-08-30 | 2012-07-18 | Lg电子株式会社 | Outer rotor type fan-motor |
-
1998
- 1998-11-13 CN CN 98248231 patent/CN2358256Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353650C (en) * | 2003-04-29 | 2007-12-05 | 建准电机工业股份有限公司 | Brushless DC motor |
| CN101512876B (en) * | 2006-08-30 | 2012-07-18 | Lg电子株式会社 | Outer rotor type fan-motor |
| CN101487478B (en) * | 2008-01-15 | 2012-06-13 | 台达电子工业股份有限公司 | Fan and its inner rotor motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |