JPH02197238A - Metal graphite brush - Google Patents
Metal graphite brushInfo
- Publication number
- JPH02197238A JPH02197238A JP1323089A JP1323089A JPH02197238A JP H02197238 A JPH02197238 A JP H02197238A JP 1323089 A JP1323089 A JP 1323089A JP 1323089 A JP1323089 A JP 1323089A JP H02197238 A JPH02197238 A JP H02197238A
- Authority
- JP
- Japan
- Prior art keywords
- brush
- powder
- parts
- pores
- graphite
- 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
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 27
- 239000010439 graphite Substances 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 23
- 239000002184 metal Substances 0.000 title abstract description 18
- 229910052751 metal Inorganic materials 0.000 title abstract description 18
- 239000011148 porous material Substances 0.000 claims abstract description 19
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 2
- 229910052753 mercury Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 14
- 239000011230 binding agent Substances 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004898 kneading Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 229910021382 natural graphite Inorganic materials 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- FBOUIAKEJMZPQG-AWNIVKPZSA-N (1E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pent-1-en-3-ol Chemical compound C1=NC=NN1/C(C(O)C(C)(C)C)=C/C1=CC=C(Cl)C=C1Cl FBOUIAKEJMZPQG-AWNIVKPZSA-N 0.000 description 1
- RSPISYXLHRIGJD-UHFFFAOYSA-N OOOO Chemical compound OOOO RSPISYXLHRIGJD-UHFFFAOYSA-N 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は長寿命、低摺動音化が要求されるワイパーモ
ータ、自動車電装用モータやマイクロモータ等に使用す
る金属黒鉛質ブラシに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a metal graphite brush used in wiper motors, motors for automobile electrical equipment, micro motors, etc., which are required to have a long life and low sliding noise.
従来の技術
従来、この種の金属黒鉛質ブラシは、例えば、黒鉛原料
に嵩密度の低いものを用いたり、揮発成分の多いバイン
ダーを加えて焼成時のバインダーの揮発によってブラシ
をやわらかくしたり、あるいは成型圧を低くしたりして
製造していた。このようにしてブラシの機械的強度を下
げるとともに、ブラシの座乗性を良好にし、しかも低い
摺動音にしようとするものであった。Conventional technology Conventionally, this type of metal graphite brush has been made by using, for example, a graphite raw material with a low bulk density, adding a binder with a high volatile content and making the brush soft by volatilization of the binder during firing, or It was manufactured by lowering the molding pressure. In this way, the mechanical strength of the brush is reduced, the seating comfort of the brush is improved, and the sliding noise is reduced.
発明が解決しようとする問題点
しかしながら、このような従来の金属黒鉛質ブラシにあ
っては、摺動音の低減効果が不十分であったり、あるい
は機械的強度が通常品の１／２〜１／３と低下するため
、特にモータに偏心や段差がある場合、ブラシの摩耗が
顕著になる欠点があった。Problems to be Solved by the Invention However, with such conventional metal graphite brushes, the effect of reducing sliding noise is insufficient, or the mechanical strength is 1/2 to 1 of that of ordinary products. /3, which has the disadvantage that brush wear becomes noticeable, especially when the motor has eccentricity or steps.
さらに、最近の金属黒鉛質ブラシに対する要求としては
、摺動音の低減と高速回転での耐摩耗性の向上をあげる
ことができる。とくに、自動車電装用のモータにおいて
は、この種の要求が極めて強くなってきている。Furthermore, recent requirements for metal-graphite brushes include reduction in sliding noise and improvement in wear resistance at high speed rotation. In particular, this type of demand is becoming extremely strong for motors for automotive electrical equipment.
これに対し、従来は機械的強度を低下させ、追従性や摺
動音の改良を行ってきた。In response to this, conventional efforts have been to reduce mechanical strength and improve followability and sliding noise.
しかし、その反面、多少の整流子の偏心や段差によって
ブラシの摩耗が増大するなどの新たな問題が生じるよう
になった。However, on the other hand, new problems have arisen, such as increased brush wear due to some eccentricity or step difference in the commutator.
また、摺動音の低減に対しては従来の対策は不十分であ
った。Furthermore, conventional measures have been insufficient for reducing sliding noise.
さらに、従来の金属黒鉛質ブラシには次のような問題点
もあった。Furthermore, conventional metal graphite brushes have the following problems.
（１） 黒鉛原料に嵩密度の低いものを用いると、ブラ
シの嵩密度が低下し、座乗性は改善されるが、比抵抗が
高くなりゃすく、接触抵抗が増大して、出力低下を招く
欠点がある。(1) If a graphite raw material with a low bulk density is used, the bulk density of the brush will decrease and seating comfort will be improved, but the specific resistance will increase, contact resistance will increase, and the output will decrease. There are drawbacks.
（２） 揮発分の多いバインダーを用いると、ブラシの
機械的強度が極端に低下し、加工時や使用時に破損しや
すくなる。また、熱膨張が大きくなり、ブラシホルダー
への固着問題が生じる。さらに、皮膜が着きやすくなる
ため、接触抵抗が高くなりやすい。(2) If a binder with a high volatile content is used, the mechanical strength of the brush will be extremely reduced, making it more likely to break during processing or use. Moreover, thermal expansion increases, causing a problem of sticking to the brush holder. Furthermore, since the film tends to adhere to the surface, the contact resistance tends to increase.
（３） 成型圧を低くしただけでは、前述の問題点が少
し改善されるものの、音や摩耗がそれほど改善されない
。(3) Merely lowering the molding pressure will slightly improve the above-mentioned problems, but will not significantly improve noise and wear.
発明の目的
この発明は前述のような従来技術の種々の欠点を改善し
て、機械的強度を大きく低下させる事なしに摺動音の小
さい金属黒鉛質ブラシを提供することを目的としている
。OBJECTS OF THE INVENTION The object of the present invention is to improve the various drawbacks of the prior art as described above, and to provide a metal-graphite brush with low sliding noise without significantly reducing mechanical strength.
発明の要旨
この発明の要旨は請求項１に記載した金属黒鉛質ブラシ
である。SUMMARY OF THE INVENTION The gist of the present invention is a metal graphite brush according to claim 1.
問題点を解決するための手段
この発明による金属黒鉛質ブラシは主としてワイパーモ
ータ、自動車電装用モータやマイクロモータに使用する
ものであり、ブラシ組織内に５〜３００μｍの気孔を分
散させる。Means for Solving the Problems The metal graphite brush according to the present invention is mainly used for wiper motors, motors for automobile electrical equipment, and micro motors, and has pores of 5 to 300 μm dispersed in the brush structure.
水銀ポロシメーターによる気孔径分布の測定で５〜３０
０μｍの気孔径の占める気孔量が気孔量全体の２０％〜
７０％を占めるように設定する。5 to 30 when measuring pore size distribution using a mercury porosimeter
The amount of pores occupied by the pore diameter of 0 μm is ~20% of the total amount of pores
Set it to occupy 70%.
このような金属黒鉛質ブラシは、例えば、ブラシ原料に
粉末状の揮発性物質例えばＰｖＡまたはセルロースを所
定量加える。ワイパーモータの場合、５〜２０重量％の
ＰＶＡまたは、５〜１０重量％のセルロースを加える。Such a metal graphite brush is produced by adding a predetermined amount of a powdered volatile substance such as PvA or cellulose to the brush raw material. For wiper motors, add 5-20% by weight of PVA or 5-10% by weight of cellulose.
この揮発性物質は熱処理時に揮発させて５〜３００μｍ
の気孔をブラシ組織内に形成する。This volatile substance is evaporated during heat treatment and has a thickness of 5 to 300 μm.
pores are formed within the brush tissue.
一般に金属黒鉛質ブラシは黒鉛に有機結合剤を加えて混
練し、粉砕後に用途に応じて銅粉等の金属粉末を混合し
てから成型および焼成して製造されているが、この発明
はこれらの工程の中で黒鉛の混練時または金属粉との混
合時に揮発性粉末を原料に対して所定量添加して、均一
に混合した後成型を行って熱処理をし、その熱処理の時
に添加した揮発性物質を揮発させ、ブラシ組織内に５〜
３００μｍの気孔を形成して所望の金属黒鉛質ブラシを
得るものである。Generally, metal-graphite brushes are manufactured by adding an organic binder to graphite, kneading it, pulverizing it, mixing it with metal powder such as copper powder depending on the application, and then molding and firing it. During the process, when kneading graphite or mixing with metal powder, a predetermined amount of volatile powder is added to the raw materials, mixed uniformly, then molded and heat treated, and the volatile powder added during the heat treatment is Volatize the substance and leave 5~
A desired metal-graphite brush is obtained by forming pores of 300 μm.
発明の作用効果
この発明による金属黒鉛質ブラシは、比抵抗や曲げ強さ
を通常品と比較して実用上問題となるほど変化させるこ
となく嵩密度を低くし、かつ整流子に対するブラシの追
従性を良くすることができる。その結果、摺動音が低減
でき、しかも耐摩耗性が極めて良好となる。Effects of the Invention The metal-graphite brush according to the present invention has a low bulk density without changing the specific resistance or bending strength to such an extent that it poses a practical problem compared to ordinary products, and has improved followability of the brush against the commutator. You can make it better. As a result, sliding noise can be reduced and wear resistance is extremely good.
この発明による金属黒鉛質ブラシはモータの出力低下を
招くことなく、機械的強度を所望の値に保持しっつ摺動
音を大幅に低減でき、しかも耐摩耗性を改善できるので
ある。このような効果は特にワイパーモータなど自動車
電装用モータやマイクロモータに適用したとき顕著とな
る。The metal-graphite brush according to the present invention can maintain mechanical strength at a desired value without causing a decrease in motor output, can significantly reduce sliding noise, and can improve wear resistance. Such effects are particularly noticeable when applied to motors for automobile electrical equipment such as wiper motors and micro motors.
なお、この発明による金属ブラシは各種のものが可能で
あり、金属粉を混合しない黒鉛質ブラシにも適用できる
ものである。Note that the metal brush according to the present invention can be of various types, and can also be applied to a graphite brush that does not contain metal powder.
実施例１〜３
天然黒鉛粉（日本黒鉛ＣＢ−１５０）１００部に対し、
フェノール樹脂１５部をアルコール３０部に溶解したも
のを結合剤として加えて、混線後に乾燥および粉砕し、
混練粉とした。つぎに、その混練粉６５部と銅粉３５部
に対して揮発性粉末としてＰＶＡを表１の割合で混合し
、２．５ｔ／ＣＴｌで成型した後に還元雰囲気５００℃
で焼成し、金属黒鉛質ブラシを得た。Examples 1 to 3 For 100 parts of natural graphite powder (Japanese graphite CB-150),
A solution of 15 parts of phenolic resin dissolved in 30 parts of alcohol was added as a binder, and after mixing, the mixture was dried and crushed.
It was made into a kneaded powder. Next, 65 parts of the kneaded powder and 35 parts of copper powder were mixed with PVA as a volatile powder in the ratio shown in Table 1, and after molding at 2.5t/CTl, the mixture was heated at 500°C in a reducing atmosphere.
A metal graphite brush was obtained.
同様にして、従来品１と、比較例１および２についても
、表１に示す条件で金属黒鉛質ブラシを製造した。Similarly, metal graphite brushes were manufactured for Conventional Product 1 and Comparative Examples 1 and 2 under the conditions shown in Table 1.
従来品１、比較例１および２、本発明の実施例１〜３に
ついて嵩密度、比抵抗、曲げ強さ、摩耗、回転数および
摺動音を測定したところ表１に示すとおりであった。The bulk density, specific resistance, bending strength, abrasion, rotational speed, and sliding noise of Conventional Product 1, Comparative Examples 1 and 2, and Examples 1 to 3 of the present invention were measured and the results are shown in Table 1.
表１から明らかなように、この発明による実施例１〜３
は摩耗および摺動音について従来品１や比較例１および
２と比較してすぐれていた。As is clear from Table 1, Examples 1 to 3 according to the present invention
was superior to Conventional Product 1 and Comparative Examples 1 and 2 in terms of wear and sliding noise.
なお、ＰＶＡは粒径が１００μｍよりも小さいもののみ
を使用した。Note that only PVA with a particle size smaller than 100 μm was used.
実施例４および５
粒径１００μｍ以下の人造黒鉛粉１００部に対して揮発
性粉末としてセルロース粉を表２の割合で添加・混合し
、混合粉を得た。セルロース粉末の粒径は１０〜５０μ
ｍであった。フェノール樹脂１５部をアルコール４０部
で溶解した結合剤によって前述の混合粉を混練した後、
乾燥および粉砕し、銅粉４０部。Examples 4 and 5 Cellulose powder was added as a volatile powder to 100 parts of artificial graphite powder having a particle size of 100 μm or less at the ratio shown in Table 2 and mixed to obtain a mixed powder. The particle size of cellulose powder is 10-50μ
It was m. After kneading the above mixed powder with a binder made by dissolving 15 parts of phenolic resin in 40 parts of alcohol,
40 parts of dried and ground copper powder.
混線粉６０部の割合で混合し、２ ｔ ／ ｃｄで成型
した後５００℃で焼成して金属黒鉛質ブラシを得た。The mixed wire powder was mixed at a ratio of 60 parts, molded at 2 t/cd, and then fired at 500°C to obtain a metal graphite brush.
同様にして比較例３，４および５も製造した。Comparative Examples 3, 4 and 5 were also produced in the same manner.
これらの実施例４および５と、比較例３゜４および５に
ついて嵩密度、比抵抗、曲げ強さ、摩耗および回転数を
測定したところ表２のような結果を得た。The bulk density, specific resistance, bending strength, wear, and rotational speed of Examples 4 and 5 and Comparative Examples 3, 4, and 5 were measured, and the results shown in Table 2 were obtained.
表２から明らかなように、この発明の実施例４および５
は特に摩耗の点で優れていることが判明した。As is clear from Table 2, Examples 4 and 5 of the present invention
was found to be particularly good in terms of wear.
この発明による金属黒鉛質ブラシをラジェターファン用
モータに適用すると、高速回転において従来品１に比較
して摩耗が１／２〜１／３に低減できるという顕著な効
果が得られたのである。When the metal graphite brush according to the present invention was applied to a radiator fan motor, a remarkable effect was obtained in that the wear could be reduced to 1/2 to 1/3 compared to the conventional product 1 at high speed rotation.
実施例６〜８
実施例１〜３と同様の方法でＰＶＡを１０重量％とし、
ＰＶＡの粒径を表３に示す粒径に設定して気孔径による
比較を行った。Examples 6-8 PVA was made 10% by weight in the same manner as Examples 1-3,
The particle size of PVA was set to the particle size shown in Table 3, and comparisons were made based on pore size.
表３から明らかなように、気孔径が５μｍよりも小さい
と、摺動音や摩耗が改善されず、３００μｍよりも大き
い気孔径を形成しようとすると、焼成時にクラックが発
生し、所望のブラシが製造できなかった。As is clear from Table 3, if the pore diameter is smaller than 5 μm, sliding noise and wear will not be improved, and if an attempt is made to form a pore diameter larger than 300 μm, cracks will occur during firing and the desired brush will not be produced. Could not be manufactured.
なお、表１について説明を追加すると、この発明による
金属黒鉛質ブラシをワイパーモータに用いる□と、従来
品１に比べてモータの回転数の低下を招くことなく摩耗
および摺動音について顕著な効果が認められ、実用上の
効果が大きい。In addition, to add an explanation to Table 1, when the metal graphite brush according to the present invention is used in a wiper motor, it has a remarkable effect on wear and sliding noise without causing a decrease in the rotational speed of the motor compared to conventional product 1. has been recognized and has great practical effects.
代 理 人 弁理士 １）辺 徹Ｃ０ＣＩ）−一 ！ｆ 寸 ＼ｆ ＼ｒ ｑつ Ｑ ＋Ｎ ＋４’）Ｃ１つ 翠 匣 匣 鄭 Ｒ（祉 鄭 垣 詠 鯉 Ｘデ Ｃぐ （Ｎ （’、Ｉ Ｃ１’） ｏＯＯつ ぽ〕 へ寸ト 旺 瓶 〉 ｉ 廿 澄 １ト ｕ〕 ０ ０ ロ〕 −〇Ｊ（Ｎ 渕 ζ 鄭 染 舗 鯉 Ｆ−１００ ＼才 ！才 ＼ｆ ＼ｆ Ｃｑ Ｏつ Ｘデ Ｃぐ ■ ０ ω寸ト ｕ〕 Ｃぐ Ｏり Ｃぐ ＣＱｒ→ ｏ ＯＯ Ｏつ ■ （） ！デ＼デば〕 ← へ Ｕつ ＯＯＯ ＼？ ０ ０ ｃｑ ＣＱ 翠 匣 匣 寥 濶 凝 （寥 垣 詠 沢Representative Patent Attorney 1) Toru Hen C0CI)-1 ! f ＼f ＼r q Q +N +4’) 1 C green box Zheng R Kaki Ei Koi X de C (N (’, I C1’) oOOtsu po〕 Hessunto want bottle 〉 i 廿 Sumi 1t u 0 0 b〕 −〇J(N Fuchi ζ Zheng dye Store Koi F-100 \Skilled! talent ＼f \f Cq Otsu X de Cgu ■ 0 ω size u Cgu Ori Cgu CQr→ o OO Otsu ■ () ! de＼deba〕 ← fart Utsu OOOO \? 0 cq CQ green box 寥 濶 Kaki Ei Sawa
Claims (1)
００μｍの気孔径の占める気孔量が気孔量全体の２０％
〜７０％を占め、かつそれらの５〜３００μｍの気孔が
ブラシ組織内に分散されていることを特徴とする金属黒
鉛質ブラシ。5 to 3 when measuring pore size distribution using a mercury porosimeter
The amount of pores occupied by the pore size of 00μm is 20% of the total amount of pores.
A metal-graphite brush characterized in that the pores occupying ~70% and having a size of 5 to 300 μm are dispersed within the brush structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1013230A JPH0813181B2 (en) | 1989-01-24 | 1989-01-24 | Metal graphite brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1013230A JPH0813181B2 (en) | 1989-01-24 | 1989-01-24 | Metal graphite brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02197238A true JPH02197238A (en) | 1990-08-03 |
| JPH0813181B2 JPH0813181B2 (en) | 1996-02-07 |
Family
ID=11827383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1013230A Expired - Fee Related JPH0813181B2 (en) | 1989-01-24 | 1989-01-24 | Metal graphite brush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0813181B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7615166B2 (en) | 2004-08-27 | 2009-11-10 | Aisin Seiki Kabushiki Kaisha | Brush material for motor and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54105704A (en) * | 1978-02-08 | 1979-08-20 | Oopatsuku Kk | Metallic graphite brush |
| JPS5694946A (en) * | 1979-12-28 | 1981-07-31 | Toshiba Ceramics Co Ltd | Metallic graphite brush |
| JPS6245670A (en) * | 1985-08-22 | 1987-02-27 | Nippon Kayaku Co Ltd | Resin composition for undercoating of metallized paper |
-
1989
- 1989-01-24 JP JP1013230A patent/JPH0813181B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54105704A (en) * | 1978-02-08 | 1979-08-20 | Oopatsuku Kk | Metallic graphite brush |
| JPS5694946A (en) * | 1979-12-28 | 1981-07-31 | Toshiba Ceramics Co Ltd | Metallic graphite brush |
| JPS6245670A (en) * | 1985-08-22 | 1987-02-27 | Nippon Kayaku Co Ltd | Resin composition for undercoating of metallized paper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7615166B2 (en) | 2004-08-27 | 2009-11-10 | Aisin Seiki Kabushiki Kaisha | Brush material for motor and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0813181B2 (en) | 1996-02-07 |
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