CN102624158B - Electric tool and magneto - Google Patents
Electric tool and magneto Download PDFInfo
- Publication number
- CN102624158B CN102624158B CN201110032957.0A CN201110032957A CN102624158B CN 102624158 B CN102624158 B CN 102624158B CN 201110032957 A CN201110032957 A CN 201110032957A CN 102624158 B CN102624158 B CN 102624158B
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- Prior art keywords
- magneto
- coil
- diverter
- end cap
- motor
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- 238000004804 winding Methods 0.000 claims abstract description 16
- 230000001629 suppression Effects 0.000 claims abstract description 6
- 230000000875 corresponding Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The open a kind of magneto of the embodiment of the present invention, including stator and rotor, described stator includes end cap, the brush being installed on end cap, for connecting the electric connection line of extraneous power supply, described rotor includes rotating shaft, it is fixed on the rotor core of rotating shaft, it is fixed on the diverter of rotating shaft, the winding being set around in rotor core and electrically connect with diverter, parallel is used between winding, described brush and diverter sliding contact, annular electro magnetic disturbance suppression device also it is equiped with on described end cap, described electromagnetic interference eliminator part is positioned at motor internal, described electric connection line passes described electromagnetic interference eliminator part.Invention additionally discloses a kind of electric tool applying above-mentioned magneto.The magneto of the present invention, uses two brushes, and electromagnetic interference eliminator part is positioned at motor internal, is not take up outside motor space；Use parallel between winding, the power density of motor can be improved, meet the trend of electric tool miniaturization.
Description
Technical field
The present invention relates to a kind of magneto, particularly relate to a kind of magneto being applied to electric tool.
Background technology
Along with electric tool such as electric drill, electric hammer, electric saw, electric planer, electric wrench and electric screw driver etc.
Being widely used, people are more and more higher to the requirement of electric tool, and as required, electric tool is not affecting performance
On the premise of volume the smaller the better.
It is desirable to provide a kind of electric tool and motor thereof being to meet the demand.
Summary of the invention
The one side of the embodiment of the present invention provides a kind of magneto, including stator and rotor, described stator
The brush that including end cap, is installed on end cap, for connecting the electric connection line of extraneous power supply, described rotor
The rotor core, the diverter being fixed on rotating shaft that including rotating shaft, are fixed on rotating shaft, it is set around rotor core
Winding that is upper and that electrically connect with diverter, described brush and diverter sliding contact, described end cap also fills
Being provided with annular electro magnetic disturbance suppression device, described electric connection line presses down through described electromagnetic interference in motor internal
Device processed.
Preferably, described diverter includes some for the commutator segment with brush contact, described rotor core
Including several teeth, described winding includes that some coils, each coil are wound on identical tooth, each
The two ends of coil are connected directly to two corresponding commutator segments respectively.
Preferably, each coil is only wrapped on a tooth.
Preferably, described motor stator includes 4 magnetic poles, and described rotor includes 6 coils, described commutation
Device includes 6 commutator segments.
Preferably, described motor includes two brushes and some equipotentials being connected between corresponding commutator segment
Line.
On the other hand, the present invention also provides for a kind of magneto, including stator and rotor, described stator bag
Include end cap, the brush being installed on end cap, for connecting the electric connection line of extraneous power supply, described rotor bag
Include rotating shaft, be fixed on the rotor core of rotating shaft, be fixed on the diverter of rotating shaft, be set around in rotor core
And the winding electrically connected with diverter, described brush and diverter sliding contact, if described diverter includes
Doing for the commutator segment with brush contact, described rotor core includes several teeth, if described winding includes
Main line circle, each coil is wound on identical tooth, and the two ends of each coil are connected directly to biphase respectively
The commutator segment answered, described some coils become parallel.
The magneto of the embodiment of the present invention: electromagnetic interference eliminator part is positioned at motor internal, is not take up electricity
Machine space outerpace；Use parallel between winding coil, the power density of motor can be improved, symbol
Close the trend of electric tool miniaturization.
In order to be able to be further understood that inventive feature and technology contents, refer to below in connection with this
Bright detailed description and accompanying drawing, but institute's accompanying drawing only provides reference and explanation use, is not used for the present invention
It is any limitation as.
Accompanying drawing explanation
Fig. 1 illustrates the electric drill of one embodiment of the invention；
Fig. 2 illustrates the schematic perspective view of the magneto of one embodiment of the invention；
Fig. 3 is the schematic perspective view after upper cover removed by the magneto of Fig. 2；
Fig. 4 is the cross sectional representation of the magneto of Fig. 1；
Fig. 5 is the rotor windings connection diagram of the magneto of Fig. 1；
The parallel schematic diagram of 4 hot-wire coils when Fig. 6 show motor work.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by the detailed description of the invention of the present invention is described in detail, will make the present invention's
Technical scheme and other beneficial effects are apparent.
Below in conjunction with Fig. 1 to Fig. 6, embodiments of the invention are illustrated.It is to be appreciated that the present invention
Electric tool can be electric drill, electric hammer, electric saw, electric planer, electric wrench and electric screw driver etc..
For simplifying explanation, illustrate as a example by electric drill below.
Refer to Fig. 1, described electric drill includes housing 10, the driving motor 20 that is installed in housing 10, by electricity
The reducing gear 70 that machine 20 drives, the tool heads 90 that driven by reducing gear.
Refer to Fig. 2 to Fig. 6, according to the magneto of one embodiment of the invention, including stator 30 and rotor
50。
Described stator 30 include shell 31, end cap 322,324, the brush 341 that is installed on end cap,
342, for connecting the electric connection line 36 of extraneous power supply.
Described shell 31 is substantially cylindrical, including an opening and a blind end.
Described end cap is fixed to the opening of described shell 31, including inner cap 322 and enclosing cover 324, described interior
Lid 322 is positioned at inside shell 31 opening, be used for installing described brush 341,342 and other electronic components in
On it.Outside described enclosing cover 324 and opening, and fix with the end of described shell 31, be used for covering institute
State brush 34 and other electronic components in the inner.
Described electric connection line 36 is for the brush 341,342 being installed in inner end cap 32 and other electronics unit
Part is powered.Annular electro magnetic disturbance suppression device (Ferrite core) also it is equiped with in described inner end cap 322
38, described electromagnetic interference eliminator part 38 is positioned at outer end cap 324, and described electric connection line 36 is in motor internal
Through described electromagnetic interference eliminator part 38.
Described rotor 50 includes rotating shaft 52, the rotor core 54 being fixed on rotating shaft 52, is fixed on changing of rotating shaft
To device 56, the winding that is set around in rotor core and electrically connects with diverter 56.Described brush 341,342
For with diverter 56 sliding contact.
Described diverter 56 includes some for the commutator segment 561～566 with brush contact, described rotor core
54 include several teeth 541～546, and described winding includes some coils 581～586, and each coil is wound in
On identical tooth, the two ends of each coil 581～586 are connected directly to two corresponding commutator segments respectively
581～586.So, during motor work, brush 341,342 contacts and through commutator segment with diverter 56
561～566 in winding power, winding hot-wire coil parallel with one another.
Preferably, each coil is only wound on a tooth.
In this embodiment, described motor stator includes 4 magnetic poles 41～44, and described diverter includes 6 commutations
Sheet 561～566, described rotor includes 6 coils 581～586, and winding sequence is as follows:
Coiling starting end is hung to commutator segment 561, then hang to commutator segment 564 (two commutator segments 561,564 it
Between coiling constitute equipotential line), then further around some circles on tooth 541 formed coil 581, so, coil
One end of 581 is connected directly to commutator segment 564；
Another end of coil 581 is directly hung to commutator segment 565, hangs to commutator segment 562 (two commutations the most again
Coiling between sheet 565,562 constitutes equipotential line), then form coil further around some circles on tooth 545
585, so, an end of coil 585 is connected directly to commutator segment 562；
Another end of coil 585 is directly hung to commutator segment 563, hangs to commutator segment 566 (two commutations the most again
Coiling between sheet 563,566 constitutes equipotential line), then form coil further around some circles on tooth 543
583, so, an end of coil 583 is connected directly to commutator segment 566；
Another end of coil 583 is directly hung to commutator segment 561, is then formed further around some circles on tooth 544
Coil 584, so, an end of coil 584 is connected directly to commutator segment 561；
Another end of coil 584 is directly hung to commutator segment 565, is then formed further around some circles on tooth 542
Coil 582, so, an end of coil 582 is connected directly to commutator segment 565；
Another end of coil 582 is directly hung to commutator segment 563, is then formed further around some circles on tooth 546
Coil 586, so, an end of coil 586 is connected directly to commutator segment 563, another end of coil 586
End is connected directly to commutator segment 564.
So, during motor work, each 4 coil electricities, described hot-wire coil becomes parallel,
As shown in Figure 6 (in figure, square frame represents 1 coil).
Motor shown in the embodiment of the present invention, uses two brushes, and electromagnetic interference eliminator part is positioned at motor
Inside, is not take up outside motor space；Use parallel between winding coil, motor can be improved
Power density, meet the trend of electric tool miniaturization.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of invention and principle, should be included in this
Within the protection domain of invention.
Claims (13)
1. a magneto, including stator and rotor, described stator includes end cap, is installed on end cap
Brush, for connecting the electric connection line of extraneous power supply, described rotor includes rotating shaft, is fixed on rotating shaft
Rotor core, be fixed on rotating shaft diverter, be set around in rotor core and electrically connect with diverter around
Group, described brush and diverter sliding contact, it is characterised in that: also it is equiped with annular electro on described end cap
Magnetic disturbance suppression device, described electromagnetic interference eliminator part is positioned at motor internal, and described electric connection line passes
Described electromagnetic interference eliminator part, described annular electro magnetic disturbance suppression device is at the circumferencial direction of described end cap
Upper and described brush spacing is arranged.
2. magneto as claimed in claim 1, wherein, described diverter include some for electricity
The commutator segment of brush contact, described rotor core includes that several teeth, described winding include some coils, often
One coil is wound on identical tooth, and the two ends of each coil are connected directly to two respectively and commutate accordingly
Sheet.
3. magneto as claimed in claim 2, wherein, described some coils become the side of being connected in parallel
Formula.
4. magneto as claimed in claim 2, wherein, each coil is only wrapped on a tooth.
5. magneto as claimed in claim 2, wherein, described motor stator includes 4 magnetic poles, institute
Stating rotor and include 6 coils, described diverter includes 6 commutator segments.
6. magneto as claimed in claim 1, wherein, described diverter include some for electricity
Brush contact commutator segment, described motor include two brushes and some be connected between corresponding commutator segment etc.
Bit line.
7. magneto as claimed in claim 1, wherein, described end cap includes inner cap and enclosing cover, institute
Stating and be equiped with above-mentioned annular electro magnetic disturbance suppression device on inner cap week side, described enclosing cover is positioned at described inner cap one
End so that described electromagnetic interference eliminator part is between described inner cap and enclosing cover.
8. magneto as claimed in claim 7, wherein, described stator also includes outside band opening
Shell, described end cap is fixed to the opening of shell, and described shell offers and passes for described electric connection line
Perforate, described electromagnetic interference eliminator part sets the through hole running through its two ends, described electromagnetic interference eliminator
The through hole of part is relative with the perforate of described shell.
9. a magneto, including stator and rotor, described stator includes end cap, is installed on end cap
Brush, for connecting the electric connection line of extraneous power supply, described rotor includes rotating shaft, is fixed on rotating shaft
Rotor core, be fixed on rotating shaft diverter, be set around in rotor core and electrically connect with diverter around
Group, described brush and diverter sliding contact, it is characterised in that: described diverter include some for
The commutator segment of brush contact, described rotor core includes that several teeth, described winding include some coils,
Each coil is wound on identical tooth, and each coil is only wrapped on a tooth, the two ends of each coil
It is connected directly to two corresponding commutator segments, the quantity of described commutator segment, the quantity of described tooth and institute respectively
The quantity stating coil is identical, and during the work of described motor, coil sections is energized, and the coil of energising becomes parallel connection even
Connect mode.
10. magneto as claimed in claim 9, wherein, the quantity of described brush is two, described
The quantity of commutator segment, tooth and coil is six, and described motor also includes that three are connected to corresponding two
Equipotential line between commutator segment, during the work of described motor, has 4 coil electricities and becomes parallel.
11. magnetoes as claimed in claim 10, wherein, described motor stator includes 4 magnetic poles.
12. magnetoes as claimed in claim 9, wherein, described end cap are also equiped with annular electromagnetism
AF panel device, described electric connection line passes described electromagnetic interference eliminator part in motor internal.
13. 1 kinds of electric tools, the driving motor including housing, being installed in housing, are driven by motor
Reducing gear, the tool heads that driven by reducing gear, wherein, described motor such as claim 1 to 12 times
One described magneto.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110032957.0A CN102624158B (en) | 2011-01-27 | Electric tool and magneto | |
| DE102012100666A DE102012100666A1 (en) | 2011-01-27 | 2012-01-26 | electric motor |
| US13/360,225 US9130438B2 (en) | 2011-01-27 | 2012-01-27 | Permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110032957.0A CN102624158B (en) | 2011-01-27 | Electric tool and magneto |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102624158A CN102624158A (en) | 2012-08-01 |
| CN102624158B true CN102624158B (en) | 2016-12-14 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5231322A (en) * | 1992-08-07 | 1993-07-27 | Ford Motor Company | Cartridge brush with integral filter inductor |
| US5949173A (en) * | 1993-06-07 | 1999-09-07 | General Electric Company | Permanent magnet direct current motor |
| CN100999075A (en) * | 2006-01-11 | 2007-07-18 | 日立工机株式会社 | Electric tool and assembling method thereof |
| CN101783567A (en) * | 2009-01-19 | 2010-07-21 | 德昌电机(深圳)有限公司 | DC motor and cooling fan module using same |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5231322A (en) * | 1992-08-07 | 1993-07-27 | Ford Motor Company | Cartridge brush with integral filter inductor |
| US5949173A (en) * | 1993-06-07 | 1999-09-07 | General Electric Company | Permanent magnet direct current motor |
| CN100999075A (en) * | 2006-01-11 | 2007-07-18 | 日立工机株式会社 | Electric tool and assembling method thereof |
| CN101783567A (en) * | 2009-01-19 | 2010-07-21 | 德昌电机(深圳)有限公司 | DC motor and cooling fan module using same |
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