JPH0270249A - Metal graphite electric brush - Google Patents
Metal graphite electric brushInfo
- Publication number
- JPH0270249A JPH0270249A JP21894588A JP21894588A JPH0270249A JP H0270249 A JPH0270249 A JP H0270249A JP 21894588 A JP21894588 A JP 21894588A JP 21894588 A JP21894588 A JP 21894588A JP H0270249 A JPH0270249 A JP H0270249A
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- copper powder
- powder
- electric brush
- voltage drop
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 25
- 239000010439 graphite Substances 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 title claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 238000005868 electrolysis reaction Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 239000002966 varnish Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910000341 lead(IV) sulfide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、金属黒鉛質電刷子に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a metal graphite electric brush.
（従来の技術）
一般に、小型モーター等に用いられる金属黒鉛質電刷子
は、銅と黒鉛を主成分とし、モーターの使用条件により
鉛や二硫化モリブデン等の添加剤が含有される。金属黒
鉛質電刷子は、使用目的から整流子との間の接触電圧降
下が低く、モーターの出力損失の少ないものが要求され
る。従来、電刷子の接触電圧降下を低くシカモーターの
出力損失を減らすための手段としては、電刷子の鋼含有
量を増したシ、接触電圧降下増大の要因となる鉛などの
添加量を減らす等の手段が行われてきた。(Prior Art) Generally, metal-graphite electric brushes used in small motors etc. mainly contain copper and graphite, and may contain additives such as lead and molybdenum disulfide depending on the usage conditions of the motor. Metal-graphite electric brushes are required to have low contact voltage drop with the commutator and low motor output loss due to their intended use. Conventionally, measures to lower the contact voltage drop of electric brushes and reduce the output loss of deer motors include increasing the steel content of the electric brush and reducing the amount of additives such as lead, which cause an increase in contact voltage drop. measures have been taken.
（発明が解決しようとする課題）
しかし、鋼含有量を増やすことは、コストアップや相対
的に黒鉛量が減少することによる潤滑性の低下につなが
如、添加剤の減量も潤滑性、耐アーク性等それぞれ添加
剤の特徴が生かしきれなくなるなどの問題点があった。(Problem to be solved by the invention) However, increasing the steel content leads to an increase in cost and a decrease in lubricity due to a relative decrease in the amount of graphite. There were problems such as not being able to take full advantage of the characteristics of the additives, such as their properties.
本発明は、接触電圧降下が低く、モーターの出力損失が
少ない金属黒鉛質電刷子を提供するものである。The present invention provides a metal graphite electric brush with low contact voltage drop and low motor output loss.
（課題を解決するための手段）
本発明は９重量で樹枝状銅粉１に対し０．１以上３未満
のフレーク状銅粉を含有してなる金属黒鉛質電刷子に関
する。(Means for Solving the Problems) The present invention relates to a metal graphite electric brush containing 9 parts by weight of flaky copper powder per 1 part dendritic copper powder of 0.1 or more and less than 3 parts.
樹枝状銅粉は例えば銅の電気分解によって得られる所謂
電解銅粉が用いられる。フレーク状銅粉とは一般的に搗
砕法等の機械的粉砕法によって得られる銅粉を指すが、
形状がフレークであればその等圧に制限はない。As the dendritic copper powder, for example, so-called electrolytic copper powder obtained by electrolysis of copper is used. Flake-like copper powder generally refers to copper powder obtained by mechanical crushing methods such as crushing method.
If the shape is a flake, there is no limit to its equal pressure.
フレーク状銅粉は成形性において樹枝状銅粉に劣る。特
に黒鉛含有量が７５重量％未満の電刷子で顕著であるの
でフレーク状銅粉の量は重量で樹枝状銅粉１に対して３
未満とされる。好ま［〜くは２以下である。−万黒鉛含
有量が７５重ｉ％以上のような多い電刷子における電刷
子の特性は黒鉛の性質に依存する程度が大きく、フレー
ク状銅粉の量が少ないと本発明の目的達成が困難になる
ので、下限は重量で樹脂状鋼粉１に対して０．１とされ
る。Flake-like copper powder is inferior to dendritic copper powder in formability. This is especially noticeable in electric brushes with a graphite content of less than 75% by weight, so the amount of flaky copper powder should be 3 to 1 dendritic copper powder by weight.
is considered to be less than It is preferably 2 or less. -The characteristics of an electric brush with a large graphite content of 75% by weight or more largely depend on the properties of graphite, and if the amount of flaky copper powder is small, it will be difficult to achieve the purpose of the present invention. Therefore, the lower limit is set to 0.1 per 1 resinous steel powder by weight.
上記の割合で樹脂状銅粉とフレーク状銅粉を配合したも
のに黒鉛粉、必要に応じて添加剤を加え。Add graphite powder and additives as necessary to a mixture of resinous copper powder and flaky copper powder in the above ratio.
公知の方法で混合、成形及び焼成して本発明の金属黒鉛
質電刷子とされる。The metal graphite electric brush of the present invention is obtained by mixing, molding and firing by a known method.
なお、黒鉛粉は潤滑性の優れている点で通常は鱗状黒鉛
が使用されるがこれに制限されるものではない。用途に
応じて人造黒鉛、熱分解黒鉛等の粉末の使用も可能であ
る。Incidentally, as the graphite powder, flaky graphite is usually used because of its excellent lubricity, but the graphite powder is not limited to this. Powders such as artificial graphite and pyrolytic graphite can also be used depending on the purpose.
また金属黒鉛質電刷子において黒鉛粉の配合量が５０重
ｔ％を越える場合は、金属粉の焼結だけでは強度が低く
なるので、結合材としてフェノール樹脂のような熱硬化
性樹脂のフェスを黒鉛粉と加熱混線粉砕して周囲に熱硬
化性樹脂を被覆した黒鉛（処理黒鉛）か、黒鉛粉と熱硬
化性樹脂の粉末との混合粉末を金属粉に加えることが好
−ましい。In addition, if the blending amount of graphite powder exceeds 50% by weight in a metal-graphite electric brush, the strength will be lowered by just sintering the metal powder, so a thermosetting resin face such as phenolic resin is used as a binding material. It is preferable to add to the metal powder graphite that has been heat mixed and crushed with graphite powder and coated with a thermosetting resin (treated graphite), or a mixed powder of graphite powder and thermosetting resin powder.
（作用） フレーク状銅粉は成形加圧方向に配向するので。(effect) Because the flaky copper powder is oriented in the direction of molding pressure.
成形方向と直角な方向を整流子との摺動面となるように
電刷子の加工をすれば、接触電圧降下が低く、モーター
の出力損失を小さくできる。If the electric brush is processed so that the sliding surface with the commutator is perpendicular to the molding direction, the contact voltage drop will be low and the output loss of the motor can be reduced.
（実施例） 次に本発明の詳細な説明する。(Example) Next, the present invention will be explained in detail.
鱗状黒鉛粉（日本黒鉛工業製、ＣＢ−１５０）にフェノ
ール樹脂フェス（日立化成工業製、ＶＰ１１Ｎ）を加え
て５５℃で混練した後、６０℃で乾燥次いで粉砕して処
理黒鉛を得た。次に電解銅粉（福田金属箔粉工業製、見
掛密度１．７ ｇ ／ ｃｃ ） ＋フレーク状銅粉（
福田金属箔粉工業製、見掛密度１．０ｇ／ｃｃ）及び上
記処理黒鉛を第１表に示す配合割合（重量比）で■形混
合機で混合し、３ｔ／ｄで圧縮成形後、ＮＨ３分解ガス
雰囲気中で７００°Ｃで焼成し９次いで加圧面と直角な
面が摺動面となるように切削加工して電刷子とした。Phenol resin face (VP11N, Hitachi Chemical Co., Ltd.) was added to scaly graphite powder (CB-150, manufactured by Nippon Graphite Industries) and kneaded at 55°C, dried at 60°C, and crushed to obtain treated graphite. Next, electrolytic copper powder (manufactured by Fukuda Metal Foil and Powder Industries, apparent density 1.7 g/cc) + flaky copper powder (
Fukuda Metal Foil & Powder Industry Co., Ltd., apparent density 1.0 g/cc) and the above-mentioned treated graphite were mixed in a ■ type mixer at the compounding ratio (weight ratio) shown in Table 1, and after compression molding at 3 t/d, NH3 It was fired at 700°C in a decomposed gas atmosphere, and then cut so that the surface perpendicular to the pressure surface became the sliding surface to obtain an electric brush.
第１表
（発明の効果）
本発明の金属黒鉛質電刷子は、接触電圧降下が従来の金
属黒鉛質電刷子よりも低く、従ってモーターに組込んだ
場合にモーター出力の損失も少ない。Table 1 (Effects of the Invention) The metal-graphite electric brush of the present invention has a lower contact voltage drop than conventional metal-graphite electric brushes, and therefore, when incorporated into a motor, there is less loss of motor output.
巖印は本発明に含まれないものを示す。A square mark indicates something not included in the present invention.
前述した製法で得られた各電刷子について接触電圧降下
を測定し、その結果を第１表に示した。The contact voltage drop was measured for each electric brush obtained by the above manufacturing method, and the results are shown in Table 1.
第１表から明らかなように、フレーク状銅粉配合量を増
してゆくと接触電圧降下が低くなり、試料丸４は磁１の
約６０％となる。試料魚５のあたりから成形が困難とな
シ、試料患６では成形時に亀裂が発生して成形不能とな
った。As is clear from Table 1, as the amount of flaky copper powder added increases, the contact voltage drop decreases, and Sample Round 4 is about 60% of Magnet 1. Sample fish 5 became difficult to mold, and sample fish 6 cracked during molding, making molding impossible.
Claims (1)
ーク状銅粉を含有してなる金属黒鉛質電刷子。1. A metal graphite electric brush containing 0.1 or more and less than 3 flaky copper powder per 1 dendritic copper powder by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21894588A JPH0270249A (en) | 1988-09-01 | 1988-09-01 | Metal graphite electric brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21894588A JPH0270249A (en) | 1988-09-01 | 1988-09-01 | Metal graphite electric brush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0270249A true JPH0270249A (en) | 1990-03-09 |
Family
ID=16727794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21894588A Pending JPH0270249A (en) | 1988-09-01 | 1988-09-01 | Metal graphite electric brush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0270249A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010193621A (en) * | 2009-02-18 | 2010-09-02 | Toyo Tanso Kk | Metal graphite brush |
-
1988
- 1988-09-01 JP JP21894588A patent/JPH0270249A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010193621A (en) * | 2009-02-18 | 2010-09-02 | Toyo Tanso Kk | Metal graphite brush |
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