CN109617352A - A kind of external rotor electric machine and exhaust fan - Google Patents
A kind of external rotor electric machine and exhaust fan Download PDFInfo
- Publication number
- CN109617352A CN109617352A CN201910086305.1A CN201910086305A CN109617352A CN 109617352 A CN109617352 A CN 109617352A CN 201910086305 A CN201910086305 A CN 201910086305A CN 109617352 A CN109617352 A CN 109617352A
- Authority
- CN
- China
- Prior art keywords
- electric machine
- shaft
- external rotor
- rotor electric
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 claims description 22
- 241000883990 Flabellum Species 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004412 Bulk moulding compound Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A kind of external rotor electric machine, including stator and can relative stator rotation rotor, the rotor includes the shell being fixedly connected, magnetizer, magnet and shaft, the shell is molded the integral structure to be formed using BMC for one, and the side wall extended including a top plate and one from the periphery of the top plate, the shaft is connected as one through the top plate and with the top plate, the magnetizer is fixed on the inside of the side wall and is integrated with the cage connection, and the magnet is fixed on the inside of the magnetizer.The shell precision of rotor of the invention is high, density is big, and then improves rotary inertia when rotor rotation, so that the noise generated in rotor rotation process is effectively reduced, while the strength and stiffness of rotor are also higher, manufacturing process is simpler.
Description
Technical field
The present invention relates to motor fields, and in particular to a kind of external rotor electric machine and the exhaust fan with the external rotor electric machine.
Background technique
Motor is generally divided into external rotor electric machine and inner rotor motor.The rotor of external rotor electric machine is rotatably installed in stator
The rotor of outside, inner rotor motor is rotatably installed in stator interior.External rotor electric machine because its is compact-sized, save space,
The advantages that deft design and be often applied to the product scopes such as exhaust fan.With being gradually increased for people's living standard, people couple
It is higher and higher in the use demand of the products such as exhaust fan, it is usual when wherein the size of noise is the products such as consumer's purchase exhaust fan
One of an important factor for considering.For this purpose, how to reduce the noise generated in external rotor electric machine rotation process in the prior art
It is a technical problem urgently to be resolved for those skilled in the art.
Summary of the invention
In view of this, the present invention is intended to provide a kind of external rotor electric machine that can solve the above problem and have the outer rotor
The exhaust fan of motor.
For this purpose, one aspect of the present invention provides a kind of external rotor electric machine, including stator and can relative stator rotation rotor, institute
Stating rotor includes the shell being fixedly connected, magnetizer, magnet and shaft, and the shell is molded the one to be formed using BMC for one
Structure, and the side wall extended including a top plate and one from the periphery of the top plate, the shaft through the top plate and with it is described
Top plate is connected as one, and the magnetizer is fixed on the inside of the side wall and is integrated with the cage connection, the magnet
It is fixed on the inside of the magnetizer.
Further, the top plate of the shell includes flat body part, and the body part includes the first opposite table
Face and second surface, the top plate further include reinforcement part, the reinforcement part from prominent extend of the first surface of the body part and
At the shaft runs through the body part and the reinforcement part.
Further, the external rotor electric machine further includes bearing, and the shaft runs through the bearing, the end of the reinforcement part
Portion is protruded into offset with the inner ring of the bearing.
In some embodiments, the cross-sectional area of the reinforcement part is from the end of the reinforcement part towards the body part
First surface is gradually increased.
In some embodiments, the top plate of the shell further includes a flange, the flange from the body part second
Surface protrusion extends, and the shaft sequentially passes through the flange, body part and reinforcement part.
In some embodiments, the body part further includes several through-holes around the shaft, several through-holes with
It is uniformly distributed centered on the shaft, and each through-hole runs through the first surface and second surface of the body part.
In some embodiments, the side wall of the shell has a step, inside indent of the step from the side wall
It forms, the magnetizer is abutted with the step.
In some embodiments, the side wall of the shell, magnetizer and magnet are annular in shape.
In some embodiments, the shell is connected as one by the way of overmolded with the shaft, magnetizer.
On the other hand, the present invention also provides a kind of exhaust fan, including flabellum and external rotor electric machine above-mentioned, the outer rotors
The shaft of motor is fixedly connected with the flabellum.
Following technical effect can be achieved in the present invention: on the one hand, the shell of the rotor in the present invention is one using BMC injection molding shape
At integral structure, the shell precision of formation is high, density is big, and then improves rotary inertia when rotor rotation, to effectively drop
The noise generated in low rotor rotation process；On the other hand, the shell in the present invention, shaft, magnetizer are connected as one, effectively
The concentricity of shaft is improved, and then reduces the vibration in rotor rotation process, to further decrease in rotor rotation process
The noise of generation and generallys use mach method manufacture shell at the same time in the prior art, then by shaft, magnetizer
The technology being assembled on shell is compared, and the integral strength and rigidity of rotor of the invention are higher, and manufacturing process is simpler.
Detailed description of the invention
Fig. 1 is the structural schematic block diagram of the exhaust fan of one embodiment of the invention.
Fig. 2 is the perspective view of the external rotor electric machine of exhaust fan shown in Fig. 1.
Fig. 3 is the cross-sectional view of external rotor electric machine shown in Fig. 2.
Fig. 4 is the exploded view of external rotor electric machine shown in Fig. 2.
Fig. 5 is the further exploded view of external rotor electric machine shown in Fig. 4, and part of components are omitted.
Fig. 6 is the exploded view of another angle of external rotor electric machine shown in Fig. 5.
Specific embodiment
Below with reference to attached drawing and specific embodiment, the present invention is described in detail, so that technology of the invention
Scheme and its advantages are relatively sharp clear.It is appreciated that attached drawing is only for reference and description, not it is used to the present invention
It limits, the size shown in attached drawing is intended merely to facilitate clear description, and does not limit proportionate relationship.
Referring to figs. 1 to shown in Fig. 4, the exhaust fan of one embodiment of the invention includes flabellum 10 and external rotor electric machine 20.It is described
External rotor electric machine 20 includes mounting rack 30, circuit board 40, mounting post 50, bearing 60, stator 70 and rotor 80.
The mounting rack 30 includes ring portion 31, and several bending sections extended to form are inclined outwardly from the outside of the ring portion 31
32, and the branch portion 33 to be formed is extended radially outward from the bending section 32, the branch portion 33 offers mounting hole 34.
The circuit board 40 is substantially annular in shape, and the mounting hole 34 of the corresponding each branch portion 33 of circuit board 40 offers another mounting hole 41.
The mounting post 50 includes the first section 51 interconnected and the second section 52, during the first section 51 and the second section 52 be in
Empty cylindrical shape, and the diameter of the first section 51 is greater than the diameter of the second section 52.In the present embodiment, the mounting post 50 is also
Including a connection ring edge 53, connection the extending outwardly radially outside from first section 51 of ring edge 53.Installation
When, circuit board 40 and mounting rack 30 are respectively arranged in the axial ends of connection ring edge 53, then for example, by zero, bolt etc.
Part connects the mounting hole 41 on mounting hole 34 and the circuit board 40 on the branch portion 33, can be fixedly connected with mounting rack
30, mounting post 50 and circuit board 40.The side of the circuit board 40 is also plugged with needle stand 42, for connecting controller (in figure not
It shows).The stator 70 is substantially annular in shape, is tight at 52 outside of the second section of the mounting post 50.
In the present embodiment, the quantity of the bearing 60 is two, and two bearings 60 are respectively arranged in the mounting post 50
The first section 51 and the second section 52 in.Specifically, the mounting post 50 further includes an annular convex platform 54, the annular convex platform
54 radially inside extending internally from first section 51 and/or the second section 52.One of 60 close-fitting of bearing
In the first section 51 and it is supported in one end of annular convex platform 54, another 60 close-fitting of bearing is in the second section 52 and is supported in
The other end of annular convex platform 54.Particularly, the end face of the end face of another bearing 60 and second section 52, in this way
The advantages of setting, is described further below.
The rotor 80 includes shaft 81, magnetizer 82, magnet 83 and the shell 90 being fixedly connected.The shell 90 is one
The one knot formed using a kind of BMC (Bulk Molding Compound, glass fiber reinforcement bulk die worker engineering plastics) injection molding
Structure, and the side wall 95 extended including a top plate 91 and one from the periphery of the top plate 91.The shaft 81 runs through the top plate 91
And it is connected as one with the top plate 91.Preferably, the shaft 81 extends vertically through the center of the top plate 91.The present embodiment
In, side wall 95, magnetizer 82 and the magnet 83 of the shell 90 are annular in shape, and the magnetizer 82 is fixed on the side wall 95
Inside and be connected as one with the shell 90, the magnet 83 is fixed on the inside of the magnetizer 82, and then described
An accommodating chamber 84 open at one end is formed in rotor 80, for accommodating the stator 70, so that the rotor 80 is around described fixed
Son 70 and can relative stator 70 circumferentially rotate.When assembly, one end of the shaft 81 of the rotor 80 is sequentially inserted into mounting post 50
The second section 52 in bearing 60 and the first section 51 in bearing 60, by the other end of the shaft 81 of the rotor 80 and institute
Flabellum 10 is stated to be fixedly connected.
On the one hand, the shell 90 of the rotor 80 in the present embodiment is molded the integral structure to be formed using BMC for one, formation
90 precision of shell is high, density is big, and then improves rotary inertia when rotor 80 rotates, so that 80 rotation process of rotor be effectively reduced
The noise of middle generation；On the other hand, the shell 90 in the present embodiment, shaft 81, magnetizer 82 are connected as one, and are effectively increased
The concentricity of shaft 81, and then the vibration in 80 rotation process of rotor is reduced, to further decrease in 80 rotation process of rotor
The noise of generation is molded the also effective integral strength for improving rotor 80 of the shell 90 to be formed and just using BMC at the same time
Degree improves the service life of external rotor electric machine 20.Furthermore shell 90, shaft 81, magnetizer 82 are integrated connection, and in the prior art
It is generally necessary to which the technology that shaft, magnetizer are respectively assembled to shell is compared, manufacturing process is simpler.
Preferably, the shell 90 is connected as one by the way of overmolded with the shaft 81, magnetizer 82.Tool
Body, in shell molds 90, the shaft 81, magnetizer 82 are arranged in mold, BMC is then injected into and forms integrally connected
Shell 90, shaft 81 and magnetizer 82.Shell 90, shaft 81, magnetizer 82 are directly connected to by the way of overmolded
Be integrated, in the prior art usually machining control precision by way of compared with, the precision in the present embodiment is protected by mold
Card, precision controlling is simpler, and integrated shell 90 obtained, shaft 81, the precision of magnetizer 82 are also higher.
It will illustrate the detailed structure of the rotor 80 and the stator 70 referring concurrently to Fig. 5 and Fig. 6 below.
In the present embodiment, the side wall 95 of the shell 90 has a step 96, and the step 96 is from the side wall 95
Side indent forms.One end of the magnetizer 82 is abutted with the step 96, the end of the side wall 95 of the other end and the shell 90
Portion flushes, and the outside of magnetizer 82 partial sidewall 95 corresponding with the step 96 abuts.In the present embodiment, the magnetizer 82
For an iron hoop.The magnet 83 can be fixedly connected using modes such as gluings with the inside of the magnetizer 82.The magnet 83
Height be less than the magnetizer 82 height.
In the present embodiment, the top plate 91 of the shell 90 of the rotor 80 includes body part 92, reinforcement part 93 and flange 94.Institute
It is flat-shaped in round flat to state body part 92, and including opposite first surface 920 and second surface 921.The reinforcement part 93 is described in
The protrusion of first surface 920 of body part 92 extends, and the flange 94 prolongs from the protrusion of second surface 921 of the body part 92
It stretches, the shaft 81 sequentially passes through the flange 94, body part 92 and reinforcement part 93.In 80 rotation process of rotor, reinforce
Good constraint is played the role of to shaft 81 by portion 93, while increasing the intensity of shaft 81, also improves the coaxial of shaft 81
Degree, and then the balance in 81 rotation process of shaft is effectively improved, vibration is reduced, to further decrease 80 rotation process of rotor
In noise.The flange 94 plays further beam to the one end for the second surface 921 that shaft 81 is located at the body part 92
Effect is tied up, and then further increases the intensity and concentricity of shaft 81.In the present embodiment, the flange 94 is in a ring.It can manage
Xie Di, the flange 94 can also be in other shapes.
Preferably, the cross-sectional area of the reinforcement part 93 of the top plate 91 is from the end of the reinforcement part 93 towards the ontology
The first surface 920 in portion 92 is gradually increased, and due to the end of the bearing 60 in the second section 52 of the mounting post 50 above-mentioned
The end face in face and second section 52, therefore, the end of the reinforcement part 93 can also protrude into and the mounting post 50
The second section 52 in the inner ring of bearing 60 offset (visible in Fig. 3) so that section that shaft 81 is connect with shell 90 and turning
The section that axis 81 is connect with bearing 60 is continuously fettered, and then further increases the intensity and concentricity of shaft 81.This reality
It applies in example, the reinforcement part 93 is substantially in a circular table shape.It is to be appreciated that in other embodiments, the reinforcement part 93 can also be in
The other shapes such as cylindrical shape, prism-shaped.
In the present embodiment, the body part 92 of the top plate 91 further includes several through-holes 922 around the shaft 81, and if
Dry through-hole 922 is uniformly distributed centered on shaft 81, and each through-hole 922 is through the first surface 920 of the body part 92 and the
Two surfaces 921.The design of through-hole 922 can not only effectively improve the heat dissipation performance of motor, and pass through the size of through-hole 922, number
The balance of shell 90 also can be improved in the arrangement of amount etc., and then reduces the vibration of rotor 80, realizes the purpose of further noise reduction.This
In embodiment, several through-holes 922 are uniformly distributed circumferentially.
The stator 70 includes stator core 71, encloses the upper and lower insulating frame 74 of the stator core 71 jointly, and around
The stator coil 79 being located on upper and lower insulating frame 74.The stator core 71 includes the yoke portion 72 of annular and is connected to yoke portion 72
Several teeth portion 73 in outside, several teeth portion 73 are uniformly distributed circumferentially.Each teeth portion 73 includes the tooth body connecting with yoke portion 72
730 and the crown 731 that is connect with the end of tooth body 730.The upper and lower insulating frame 74 includes a ring part 75, certainly annular
Ring edge portion 76 made of 75 one end of portion extends radially outward, several branches 77 in outside for being connected to ring edge portion 76, Yi Jilian
Connect the interconnecting piece 78 of contiguous branch 77.The interconnecting piece 78 is arc-shaped, and the corresponding yoke portion 72 for being covered on the stator core 71
Outside.The branch 77 includes the square frame 770 of the tooth body 730 of the corresponding stator core 71, and the corresponding stator magnet
The arc frame 771 of the crown 731 of core 71.When assembly, the both ends of stator core 71 will be respectively placed in around insulating frame 74 above and below,
Then make to be aligned with the teeth portion 73 of stator core 71 respectively around the branch 77 of insulating frame 74 above and below, and then will be above and below around insulating frame
74 are fastened on 71 surface of stator core, and only expose the outside and inside of stator core 71, realize in the side of upper and lower insulating frame 74
On shape frame 770 after winding stator coil 79, guarantee the insulation of stator core 71 and stator coil 79.
The foregoing is merely the preferable specific embodiments of the present invention, and protection scope of the present invention is not limited to listed above
Embodiment, anyone skilled in the art within the technical scope of the present disclosure, can become apparent to
Technical solution simple change or equivalence replacement fall within the protection scope of the present invention.
Claims (10)
1. a kind of external rotor electric machine, including stator and can relative stator rotation rotor, the rotor include be fixedly connected it is outer
Shell, magnetizer, magnet and shaft, which is characterized in that the shell be one the integral structure to be formed is molded using BMC, and including
One top plate and the side wall that extends from the periphery of the top plate, the shaft through the top plate and are connected as one with the top plate
Body, the magnetizer are fixed on the inside of the side wall and are integrated with the cage connection, and the magnet is fixed on described lead
The inside of magnet.
2. external rotor electric machine according to claim 1, which is characterized in that the top plate of the shell includes flat ontology
Portion, the body part include opposite first surface and second surface, and the top plate further includes reinforcement part, and the reinforcement part is from institute
The first surface protrusion for stating body part extends, and the shaft runs through the body part and the reinforcement part.
3. external rotor electric machine according to claim 2, which is characterized in that the external rotor electric machine further includes bearing, described
Shaft runs through the bearing, and the end of the reinforcement part is protruded into offset with the inner ring of the bearing.
4. external rotor electric machine according to claim 2, which is characterized in that the cross-sectional area of the reinforcement part is from the reinforcement
The first surface of the end in portion towards the body part is gradually increased.
5. external rotor electric machine according to claim 2, which is characterized in that the top plate of the shell further includes a flange, institute
It states flange to extend from the second surface protrusion of the body part, the shaft sequentially passes through the flange, body part and adds
Strong portion.
6. external rotor electric machine according to claim 2, which is characterized in that the body part further includes around the shaft
Several through-holes, several through-holes are uniformly distributed centered on the shaft, and each through-hole runs through the first of the body part
Surface and second surface.
7. external rotor electric machine according to claim 1, which is characterized in that the side wall of the shell has a step, described
Step is formed from the inside indent of the side wall, and the magnetizer is abutted with the step.
8. external rotor electric machine according to claim 1, which is characterized in that side wall, magnetizer and the magnet of the shell
It is annular in shape.
9. external rotor electric machine according to claim 1, which is characterized in that the shell is by the way of overmolded and institute
State shaft, magnetizer is connected as one.
10. a kind of exhaust fan, which is characterized in that including flabellum and external rotor electric according to any one of claim 1 to 9
Machine, the shaft of the external rotor electric machine are fixedly connected with the flabellum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910086305.1A CN109617352B (en) | 2019-01-29 | 2019-01-29 | Outer rotor motor and exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910086305.1A CN109617352B (en) | 2019-01-29 | 2019-01-29 | Outer rotor motor and exhaust fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109617352A true CN109617352A (en) | 2019-04-12 |
| CN109617352B CN109617352B (en) | 2024-02-06 |
Family
ID=66018848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910086305.1A Active CN109617352B (en) | 2019-01-29 | 2019-01-29 | Outer rotor motor and exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109617352B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026327A (en) * | 2007-02-28 | 2007-08-29 | 阮桂林 | Non negative torque outer-rotor permanent magnet motor |
| CN101127462A (en) * | 2006-08-16 | 2008-02-20 | 台达电子工业股份有限公司 | Fan, motor and magnetic conduction shell |
| KR20100030515A (en) * | 2008-09-10 | 2010-03-18 | 엘지전자 주식회사 | Outer rotor type fan motor |
| CN102195422A (en) * | 2011-05-20 | 2011-09-21 | 戴珊珊 | Multilayer coupling type external rotor permanent magnet brushless motor |
| CN203429443U (en) * | 2013-08-10 | 2014-02-12 | 常州至精精机有限公司 | Mounting casing of washer driving mechanism |
| WO2017036354A1 (en) * | 2015-08-28 | 2017-03-09 | 戴珊珊 | Permanent magnetic reluctance motor with independent ac excitation by outer rotor |
| CN207021844U (en) * | 2017-06-01 | 2018-02-16 | 姜春辉 | A kind of cartridge type outer rotor iron-core less motor |
| CN209562364U (en) * | 2019-01-29 | 2019-10-29 | 艾博金电气制造（深圳）有限公司 | A kind of external rotor electric machine and exhaust fan |
-
2019
- 2019-01-29 CN CN201910086305.1A patent/CN109617352B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127462A (en) * | 2006-08-16 | 2008-02-20 | 台达电子工业股份有限公司 | Fan, motor and magnetic conduction shell |
| CN101026327A (en) * | 2007-02-28 | 2007-08-29 | 阮桂林 | Non negative torque outer-rotor permanent magnet motor |
| KR20100030515A (en) * | 2008-09-10 | 2010-03-18 | 엘지전자 주식회사 | Outer rotor type fan motor |
| CN102195422A (en) * | 2011-05-20 | 2011-09-21 | 戴珊珊 | Multilayer coupling type external rotor permanent magnet brushless motor |
| CN203429443U (en) * | 2013-08-10 | 2014-02-12 | 常州至精精机有限公司 | Mounting casing of washer driving mechanism |
| WO2017036354A1 (en) * | 2015-08-28 | 2017-03-09 | 戴珊珊 | Permanent magnetic reluctance motor with independent ac excitation by outer rotor |
| CN207021844U (en) * | 2017-06-01 | 2018-02-16 | 姜春辉 | A kind of cartridge type outer rotor iron-core less motor |
| CN209562364U (en) * | 2019-01-29 | 2019-10-29 | 艾博金电气制造（深圳）有限公司 | A kind of external rotor electric machine and exhaust fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109617352B (en) | 2024-02-06 |
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