CN100521404C - Carbon brush - Google Patents
Carbon brush Download PDFInfo
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- CN100521404C CN100521404C CNB2006101518672A CN200610151867A CN100521404C CN 100521404 C CN100521404 C CN 100521404C CN B2006101518672 A CNB2006101518672 A CN B2006101518672A CN 200610151867 A CN200610151867 A CN 200610151867A CN 100521404 C CN100521404 C CN 100521404C
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims description 37
- 230000001070 adhesive effect Effects 0.000 claims description 37
- 239000003575 carbonaceous material Substances 0.000 claims description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 26
- 229910052750 molybdenum Inorganic materials 0.000 claims description 26
- 239000011733 molybdenum Substances 0.000 claims description 26
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 25
- 239000010439 graphite Substances 0.000 claims description 23
- 229910002804 graphite Inorganic materials 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 229920001187 thermosetting polymer Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 30
- 230000000452 restraining effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 49
- 239000000203 mixture Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 15
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 11
- 229910052721 tungsten Inorganic materials 0.000 description 11
- 239000010937 tungsten Substances 0.000 description 11
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 10
- 239000002956 ash Substances 0.000 description 10
- 229920000647 polyepoxide Polymers 0.000 description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 9
- 238000000465 moulding Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000007654 immersion Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 239000005083 Zinc sulfide Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011135 tin Substances 0.000 description 6
- 229910052718 tin Inorganic materials 0.000 description 6
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 229920001568 phenolic resin Polymers 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000010696 ester oil Substances 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000013212 metal-organic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- ZYHMJXZULPZUED-UHFFFAOYSA-N propargite Chemical compound C1=CC(C(C)(C)C)=CC=C1OC1C(OS(=O)OCC#C)CCCC1 ZYHMJXZULPZUED-UHFFFAOYSA-N 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
A carbon brush with improved radio interference restraining property that restrains generation of radio noise is provided. The carbon brush comprises carbon base material and an additive.
Description
The application is application number the dividing an application for China's application of " carbon brush " that be CN03138665.2 (applying date is on June 6th, 2003), denomination of invention.
Technical field
The present invention relates to a kind of carbon brush that is used for motor, particularly be used for the carbon brush of the commutator machine of electric tool, vacuum cleaner etc., produce less radio interference.
Technical background
Traditionally, by in carbon-based material, adding kollag and grinding agent and on all surfaces the part that contact commutator except brush, applying the metal of satisfactory electrical conductivity, the temperature that suppresses brush raises and also keeps stable commutation effect for a long time, developed the carbon brush that is used for this class motor, as disclosed among the JP-A-2000-197315.
But, in recent years,, pursued miniaturization, high output and higher rotating speed especially about the carbon brush of the brush motor of vacuum cleaner, electric tool etc.So, required to have small size but had more small resistor loss and the carbon brush of friction more.
On the other hand, the carbon brush that satisfies this requirement is easy to generate radio noise.When producing radio noise, may the electric equipment around the carbon brush be had some influences and cause their irregular workings.So, in many countries, comprise Japan, particularly in the European countries and the U.S., the strict standard that overcomes radio noise is provided and has taked preventive measures to resist the generation of radio noise.In order to reduce the generation of various radio interference, considered the oil immersion of brush base material, as disclosed among the JP-A-8-130078.
But along with rotating speed further increases, independent oil immersion is not enough to control radio interference.And there is a problem in oil immersion, promptly because the loss of the impregnation oils that long term storage produces has hindered the stable control of radio interference.
Therefore, the purpose of this invention is to provide the more carbon brush of small radio interference of a kind of generation, it suppresses the generation of radio noise.
Summary of the invention
In order to overcome the above problems, the inventor has been found that specific metal or the inorganic material of adding suppresses the generation of radio interference in the carbon back material of brush, and has finished the present invention.
Particularly, by in carbon-based material, adding the additive of making by metal or inorganic material, the radio interference of having improved carbon brush of the present invention produces performance, and described carbon-based material is by mixing powdered graphite and this adhesive component of heat treatment forms with adhesive.
Additive is preferably made with at least a of tungsten, tin, zinc oxide and zinc sulphide.
Preferably, additive is no more than 3 weight % of carbon-based material and is not less than 0.3 weight %.
Preferably, additive is molybdenum bisuphide and carborundum.
Preferably, molybdenum bisuphide is not less than 0.5% of carbon-based material and adhesive total amount, and is not more than 3%, and carborundum is not less than 0.1% of carbon-based material and adhesive total amount, and is not more than 0.5%.
Carbon-based material is preferably used oil-impregnated.
Adhesive is thermosetting resin or pitch preferably.
The accompanying drawing summary
Fig. 1 is the figure of expression according to the result of the terminal interference voltage measurement of the carbon brush of embodiment of the present invention.
Fig. 2 is the enlarged drawing of the low frequency region shown in Fig. 1.
Fig. 3 is the figure of expression according to the result of the interference voltage measurement of the carbon brush of embodiment of the present invention.
Carbon-based material of the present invention can be native graphite, expanded graphite or Delanium. Wherein, the Delanium that has than low-crystallinity is particularly preferred. Also can use by mixing the prepared graphite granule of these graphite materials. The form of graphite is especially restriction, and can be for example flaky graphite or amorphous graphite. By using these carbon-based materials and being adjusted in mixing condition, baking condition of preparatory phase etc., can realize the resistivity of the brush base material of wishing.
As the adhesive in conjunction with these graphite granules, can use thermosetting resin commonly used. For example, can use solid or liquid epoxies, phenolic resins or by these epoxy resin of modification, the prepared various thermosetting resins of phenolic resins. Preferably, these resins for adhesive are 10-40% of composition.
Add in the sulfide of the oxide of tungsten, tin, zinc, these metals and these metals one or more in the carbon-based material. Especially, additive is preferably by at least a the making in tungsten, tin, zinc oxide and the zinc sulphide. And tungsten is particularly preferred as additive, because only a small amount of tungsten can show stable radio interference rejection in wide frequency ranges.
Additive is 3 % by weight of carbon-based material or still less, more preferably 1% or still less, and be 0.3% or more. If additive capacity is less than 0.3 % by weight, the radio interference inhibitory action is little. If additive capacity surpasses the limit of 3 % by weight, perhaps 1% the more preferably limit, the hardness of carbon-based material increases, and low friction performance worsens.
In addition, molybdenum bisuphide and carborundum can be additives. Molybdenum bisuphide is as additive, separately when resin etc. mixes, flocculates easily under the impact of static etc. and is not easy Uniform Dispersion. But, in the present invention, owing to molybdenum bisuphide mixes with the electrically conductive graphite particle, so, because the less generation of flocculation of generation of static electricity. And adhesive joins wherein and mixes, and then grinds. So molybdenum bisuphide disperses fully by mechanochemical treatment, and adhere to also bonding with adhesive and graphite granule securely. Contain powdered graphite to what prepare in this way as mixed-powder moulding and the heat treatment of main component, to produce the brush base material.
But, contain the brush of molybdenum bisuphide, form coating at commutator face easily in the time of in use. Along with this coating thickening, peel off easily. If occur partly to peel off etc., electric current has worsened commutation ability in this segment set. In some cases, commutator itself is damaged and necessary changes. So the addition of molybdenum bisuphide is preferably the 0.5%-3% of the total amount of carbon-based material and adhesive. 1.0%-2.0% more preferably. This can meet the radio noise standard. If the molybdenum bisuphide addition is less than 0.5%, the lubricity of this commutator reduces and the generation radio noise. If described amount is greater than 3%, the coating that forms at commutator face becomes too much, and commutation ability worsens. As a result, produce radio noise.
In order to reduce this coating that is formed at commutator face by molybdenum bisuphide, add the carborundum as grinding agent in the brush base material. Equally, if the amount of carborundum is too many or its particle size is too large and carborundum flocculation rather than Uniform Dispersion, then commutator face is damaged, and this can cause radio noise. So the addition of carborundum is preferably the 0.1%-0.5% of carbon-based material and adhesive total amount, more preferably 0.1%-0.3%. If should measure less than 0.1, carborundum does not present the effect of its hope. If should measure greater than 0.5%, commutator face is damaged, and the rising of brush temperature, burns out commutator. If the particle size of carborundum is greater than 100 μ m, its abrasive action is too strong, thus alligatoring commutator face and the friction that increases commutator. If particle size less than 5 μ m, then reduces the effect of removing the coating on the commutator face. So particle size is preferably 5-100 μ m. Because carborundum and resin etc. have affinity and in resin etc. dispersiveness arranged, so carborundum and resin can add and mix with lubricant when beginning, perhaps carborundum and resin can mix, grind, then pass through the mixing adding.
Owing in carbon-based material, add molybdenum bisuphide and carborundum with scheduled volume in this way, so, the coating regulatory function of the lubricity of molybdenum bisuphide and carborundum interacts on the commutator face, has therefore stablized commutation ability and has suppressed the generation of radio noise.
When powdered graphite and adhesive such as thermosetting resin or pitch mix, add these additives.
Powdered graphite and thermosetting resin adhesive are mixed and carbonization or curing adhesive component after, with this brush base material of oil-impregnated.This oil immersion further promotes the improvement of radio interference rejection.For this oil, can use synthetic hydrocarbon oil, ester oil, mineral oil or petroleum hydrocarbon.The oil immersion ratio is preferably 2 weight % or more, more preferably 2-10% of brush base material.Particularly preferably being this oily 1-0.5% is silicon components.
Be pressed on the whole lateral surfaces of the upwardly extending brush in side on the commutator face as brush therein or the metal coating on its part, can form and apply copper by electroless process.When carrying out copper facing, after copper facing, carry out above-mentioned oil immersion.If the plated copper film that applies like this is too thick, then is in the surface of the brush carrier slidingsurface of its alligatoring pairing when sliding, and often increases with friction between the commutator that contacts at brush.On the other hand, if plated copper film is extremely thin, the effect of brush substrate coating is little, can not sufficiently reduce the resistance of brush.This feasible temperature rising that is difficult to suppress brush.So preferably the thickness of plated copper film is about 0.1-100 μ m.
Embodiment preferred describes in detail
Hereinafter, will use embodiment to describe the present invention in detail.Should be noted that and the invention is not restricted to following examples.
Embodiment 1
To 70 parts of average particle size particle size be 20 μ m and content of ashes be 1.0% or the mixture of still less Delanium powder and native graphite powder in, add 30 mass parts phenolic resins and 0.5 part of tungsten, this mixture was mixed 1 hour at 150 ℃.After this, this mixture is ground to 40 orders or littler particle size, and under the pressure of 100Mpa, is pressed into the size of 6 * 9 * 15mm,, thereby form the brush base material at 700 ℃ of described resins of heat treatment.Using this brush base material according to DIN51561 is 68 (mm in the kinetic viscosity of 40 ℃ of mensuration
2/ s) synthetic alkyl oil and ester oil immersion, and, make it reach 4.5 weight % of total weight with this brush base material of oil-impregnated.
Embodiment 2
By the tungsten among the 0.5 weight % adding tin replacement embodiment 1 that presses base material, preparation brush base material.This brush base material oil-impregnated, making oil mass is 3.8 weight %.
Embodiment 3
Make its 0.5% tungsten that replaces among the embodiment 1 that reaches base material weight, preparation brush base material by adding zinc oxide (ZnO).This brush base material oil-impregnated, making oil mass is 3.7 weight %.
Embodiment 4
Make its 0.5% tungsten that replaces among the embodiment 1 that reaches base material weight, preparation brush base material by adding zinc sulphide (ZnS).This brush base material oil-impregnated, making oil mass is 4.0 weight %.
The comparative example 1
To 70 mass parts average particle size particle size be 20 μ m and content of ashes be 1.0% or the mixture of still less Delanium powder and native graphite powder in, add 30 mass parts phenolic resins, this mixture was mixed 1 hour at 150 ℃.After this, this mixture is ground to 40 orders or littler particle size, and under the pressure of 100MPa, is pressed into the size of 6 * 9 * 15mm,, thereby form the brush base material at 700 ℃ of described resins of heat treatment.This brush base material use with embodiment 1 in used identical oil immersion bubble, making oil mass is 4.5 weight %.
Brush for embodiment 1-4 and comparative example 1, under the condition of AC 230V, 60Hz and 15 minutes, use is carried out measurement of end (terminal) interference voltage and interference voltage and is measured based on EMI (electronic jamming) test of CISPR (Comite International Specialdes Perturbations Radioelectriques) 14 standards.The result that the terminal interference voltage of table 1 expression is measured.The result that table 2 expression interference voltage is measured.
Table 1
Table 2
Shown in table 1 and 2, when containing tungsten, tin, zinc, zinc oxide or zinc sulphide as additive, noise level can reduce some dB.
Table 3 expression embodiment 1-4 and comparative example's 1 physical characteristic.
Table 3
Physical characteristic
| Bulk specific weight | Hardness SHORE C type | Resistivity μ Ω m | Bond strength MPa | |
| Embodiment 1 | 1.61 | 35 | 720 | 20.0 |
| Embodiment 2 | 1.60 | 35 | 690 | 19.4 |
| Embodiment 3 | 1.60 | 36 | 690 | 19.6 |
| Embodiment 4 | 1.62 | 36 | 700 | 19.5 |
| The comparative example | 1.60 | 35 | 670 | 20.6 |
As shown in table 3, even contain tungsten, tin, zinc, zinc oxide or zinc sulphide, also can keep physical characteristic satisfactorily as additive.
Adding molybdenum bisuphide powder and the silicon carbide powder embodiment as additive will be described below.
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.1% or littler Delanium powder, 1 part of molybdenum bisuphide powder and 0.15 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
Embodiment 6
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.1% or littler Delanium powder, 1 part of molybdenum bisuphide powder and 0.3 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
Embodiment 7
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.1% or littler Delanium powder, 2 parts of molybdenum bisuphide powder and 0.15 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
Embodiment 8
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.1% or littler Delanium powder, 0.5 part of molybdenum bisuphide powder and 0.15 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
Embodiment 9
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.1% or littler Delanium powder, 3 parts of molybdenum bisuphide powder and 0.15 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
The comparative example 2
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.2% or littler Delanium powder and 0.15 part of average particle size particle size be 50 μ m carborundum mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
The comparative example 3
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.2% or littler Delanium powder, 1 part of molybdenum bisuphide powder and 1 part of average particle size particle size be 75 μ m aluminium powder mixes that powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
The comparative example 4
The average particle size particle size of 80 mass parts be 40 μ m and content of ashes be 0.2% or littler Delanium powder and 0.5 part of molybdenum bisuphide powder mix, powdered graphite is 100 parts with the total amount of the adhesive that the back adds., and mixed at normal temperatures 1 hour as adhesive to the universal epoxy resin that wherein adds 20 mass parts.Then, this mixture is ground to 400 μ m or littler particle size, and under the pressure of 200MPa, is pressed into the size of 7 * 11 * 30mm.Then this moulding material 180 ℃ of heat treatments, thereby form carbon brush.
For the brush of embodiment 5-9 and comparative example 2-4, use EMI test based on CISPR 14 standards, under the condition of AC 230V and 50Hz, carry out terminal interference voltage measurement and interference voltage and measure.Table 4 and Fig. 1 and 2 represent the result that terminal interference voltage is measured.Table 5 and Fig. 3 represent the result that interference voltage is measured.Fig. 2 is the enlarged drawing of the low frequency region shown in Fig. 1.
Table 4
Table 5
As table 4 and 5 and Fig. 1-3 shown in, with being not less than 0.5% and be not more than 3% molybdenum bisuphide by what in carbon-based material, add carbon-based material and adhesive total amount, and add carbon-based material and adhesive total amount be not less than 0.5% and be not more than the carbon brush of the embodiment 1-5 that 1% silicon produces, the radio noise that is produced is equal to or less than the radio noise standard in the European countries and the U.S..
The present invention constitutes as mentioned above.By in carbon-based material, adding specific metal component or inorganic material such as molybdenum bisuphide and carborundum, reduced radio noise and can stably improve the radio interference rejection with predetermined ratio.
Claims (7)
1. carbon brush that produces less radio interference, it is characterized in that, in the carbon-based material of carbon brush, added additive, wherein said additive is molybdenum bisuphide and carborundum, and wherein molybdenum bisuphide is being not less than 0.5 weight % and being not more than 3 weight % of described carbon-based material, and carborundum is being not less than 0.1 weight % and being not more than 0.5 weight % of described carbon-based material.
2. carbon brush that produces less radio interference, it is characterized in that, it is the carbon brush that contains the less radio interference of generation of carbon-based material and additive, it is to produce by add described additive in powdered graphite and adhesive is mixing and the heat treatment adhesive forms described carbon-based material, wherein said additive is molybdenum bisuphide and carborundum, and wherein molybdenum bisuphide is being not less than 0.5 weight % and being not more than 3 weight % of described carbon-based material, and carborundum is being not less than 0.1 weight % and being not more than 0.5 weight % of described carbon-based material.
3. according to the carbon brush of the less radio interference of generation of claim 2, it is characterized in that, when powdered graphite and adhesive are mixing, add these additives.
4. according to the carbon brush of the less radio interference of generation of claim 1, wherein said carbon-based material oil-impregnated.
5. according to the carbon brush of the less radio interference of generation of claim 2 or 3, wherein said carbon-based material oil-impregnated.
6. according to the carbon brush of the less radio interference of generation of claim 2 or 3, wherein said adhesive is thermosetting resin or pitch.
7. according to the carbon brush of the less radio interference of generation of claim 5, wherein said adhesive is thermosetting resin or pitch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002165933A JP3872383B2 (en) | 2002-06-06 | 2002-06-06 | Carbon brush |
| JP165933/2002 | 2002-06-06 | ||
| JP323279/2002 | 2002-11-07 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031386652A Division CN100375343C (en) | 2002-06-06 | 2003-06-06 | Carbno brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1956280A CN1956280A (en) | 2007-05-02 |
| CN100521404C true CN100521404C (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101518672A Expired - Lifetime CN100521404C (en) | 2002-06-06 | 2003-06-06 | Carbon brush |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3872383B2 (en) |
| CN (1) | CN100521404C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007028841A (en) * | 2005-07-20 | 2007-02-01 | Hitachi Chem Co Ltd | Brush for dc electric motor and its manufacturing method |
| CN101297462B (en) | 2005-11-10 | 2012-07-25 | 株式会社美姿把 | Carbon brush of motor and method for producing the same |
| JP6267912B2 (en) | 2013-10-02 | 2018-01-24 | 東洋炭素株式会社 | Metal-carbon brush and method for producing the same |
| CN104779511B (en) * | 2014-01-15 | 2017-04-05 | 苏州东翔碳素有限公司 | The preparation method of running machine motor brush and the brush prepared by the method |
| CN104022425A (en) * | 2014-06-23 | 2014-09-03 | 3M中国有限公司 | Carbon brush and preparation method thereof |
| DE102015205735A1 (en) * | 2015-03-30 | 2016-10-06 | Schunk Hoffmann Carbon Technology Ag | Use of a carbon composite material for producing electrical contact bodies for a fuel pump and contact body |
| DE102016213653A1 (en) * | 2016-07-26 | 2018-02-01 | Schunk Hoffmann Carbon Technology Ag | Discharge device for dissipation of electrical interference |
| JP7250337B2 (en) * | 2019-11-25 | 2023-04-03 | トライス株式会社 | METAL-GRAPHITIC EARTH BRUSH MAINLY COMPOUNDED BY SILVER AND METHOD FOR MANUFACTURING THE SAME |
| CN116505341B (en) * | 2023-05-10 | 2023-11-28 | 湖北东南佳新材料有限公司 | Wear-resistant carbon brush material and preparation method thereof |
-
2002
- 2002-06-06 JP JP2002165933A patent/JP3872383B2/en not_active Expired - Lifetime
-
2003
- 2003-06-06 CN CNB2006101518672A patent/CN100521404C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004014294A (en) | 2004-01-15 |
| JP3872383B2 (en) | 2007-01-24 |
| CN1956280A (en) | 2007-05-02 |
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Effective date of registration: 20070316 Address after: Osaka City, Osaka of Japan Applicant after: TOYO TANSO Co.,Ltd. Address before: Japan Osaka Toyonaka Applicant before: Totankako Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHANGHAI TOYO TANSO Co.,Ltd. Assignor: TOYO TANSO Co.,Ltd. Contract record no.: 2010990000305 Denomination of invention: Fixing apparatus for vacuum sweeper motor carbon brush assembling Granted publication date: 20090729 License type: Common License Open date: 20070502 Record date: 20100521 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190415 Address after: Kagawa Patentee after: Totankako Co.,Ltd. Address before: Osaka City, Osaka of Japan Patentee before: TOYO TANSO Co.,Ltd. |
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Address after: Osaka Patentee after: Totankako Co.,Ltd. Address before: Kagawa Patentee before: Totankako Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20070502 Assignee: Dongyang Carbon (Zhejiang) Co.,Ltd. Assignor: Totankako Co.,Ltd. Contract record no.: 2019990000197 Denomination of invention: Fixing apparatus for vacuum sweeper motor carbon brush assembling Granted publication date: 20090729 License type: Common License Record date: 20190620 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
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