JPS61158681A - Electric brush - Google Patents
Electric brushInfo
- Publication number
- JPS61158681A JPS61158681A JP27572184A JP27572184A JPS61158681A JP S61158681 A JPS61158681 A JP S61158681A JP 27572184 A JP27572184 A JP 27572184A JP 27572184 A JP27572184 A JP 27572184A JP S61158681 A JPS61158681 A JP S61158681A
- Authority
- JP
- Japan
- Prior art keywords
- electric brush
- electric
- brush
- raw material
- carbon fiber
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 本発明は回転電機の電刷子に関する。[Detailed description of the invention] The present invention relates to an electric brush for a rotating electric machine.
（従来技術とその問題点）
整流の困難な直流機及び交流整流子機に用いる電刷子の
整流性能を向上させるため従来採られてきた方法は、刷
子材の弾性率を下げ粘性係数と固有抵抗を上げることで
あった。しかし、最近の電気機械の進歩に対しては、こ
のような方法のみでは到底追い付かなくなってきたため
、内外に於いて複合桐子即ち層状刷子及び分割刷子が実
用されるようＫなった。(Prior art and its problems) The conventional method to improve the rectification performance of electric brushes used in DC machines and AC commutator machines, which are difficult to rectify, is to lower the elastic modulus of the brush material and increase the viscosity coefficient and specific resistance. It was to raise the level. However, with recent advances in electrical machinery, it has become impossible for this method alone to keep up with the progress, so composite paulownia, that is, layered brushes and split brushes, have come into practical use both at home and abroad.
即ち整流時に於ける刷子の短絡電流はり７クタンス電圧
によって決定され、リアクタンスは電刷子の厚さく逆関
係に増減する。そこでリアクタンス電圧を減少するため
電刷子の厚さを大きくすると短絡抵抗が減少し、そのた
めに短絡電流が増大する。又短絡抵抗を増大するために
電刷子の厚さを小さくするとりアクタンス電圧が増大し
、そのために短絡電流が増大する。That is, the short-circuit current of the brush during rectification is determined by the reactance voltage, and the reactance increases and decreases in an inverse relationship with the thickness of the electric brush. Therefore, if the thickness of the electric brush is increased in order to reduce the reactance voltage, the short circuit resistance will decrease, and therefore the short circuit current will increase. Furthermore, if the thickness of the electric brush is reduced in order to increase the short-circuit resistance, the actance voltage increases, which increases the short-circuit current.
従って電刷子の厚さを適切に決定して良好な整流作用を
保持することは困難であるので、短絡電流通路の抵抗を
高くして整流作用を改善する目的で、電刷子を複数個に
分割し２分割片をある程度自由に動き得るようにした分
割刷子１分割片を例えば合成樹脂で接着し分割片間を絶
縁し電刷子全体の厚さを小さくすることなく、即ちリア
クタンス電圧を増大することなく短絡電流通路の抵抗を
高くした貼シ合せ刷子などがある。しかしこれらの電刷
子は、加工がむずかしいこと、加工工数が多くかかるこ
と等のために高価となって、用途としては鉄鋼関係の圧
延機用のモーター、電車の主電動機等の大形直流機等に
のみ用いられ、自動車のスターター用モーター、プロワ
−用モーター。Therefore, it is difficult to properly determine the thickness of the electric brush and maintain a good rectifying effect, so in order to improve the rectifying effect by increasing the resistance of the short-circuit current path, the electric brush is divided into multiple pieces. A divided brush in which the two divided pieces can move freely to a certain extent. One divided piece is bonded with synthetic resin, for example, to insulate the divided pieces, and the reactance voltage can be increased without reducing the thickness of the entire electric brush. There are laminated brushes that have a higher resistance in the short-circuit current path. However, these electric brushes are expensive because they are difficult to process and require a large number of man-hours, and their applications include motors for steel-related rolling mills, large DC machines such as main motors for trains, etc. Used only for automobile starter motors and propeller motors.
ワイパー用モーター、を動工具用のモーター、家庭用の
クリーナー用モーター等の小形の電刷子には採用されず
、従来からの単体の電刷子が用いられている現状である
。このほか、８糧の性質の相違する例えば成形焼成した
場合の電気比抵抗の相違する原料粉を層状に積層成形し
、焼成した成層刷子が提案されている。第５図及び第６
図に成層刷子の例で１図において１は高電気抵抗原料粉
。It is not used in small electric brushes such as wiper motors, power tool motors, household cleaner motors, etc., and conventional single electric brushes are currently used. In addition, a laminated brush has been proposed in which eight raw material powders having different properties, for example, different electric resistivities when molded and fired, are laminated into layers and fired. Figures 5 and 6
The figure shows an example of a stratified brush. In the figure, 1 is a high electrical resistance raw material powder.
２は低電気抵抗原料粉、３はリード線、矢印４は。2 is a low electrical resistance raw material powder, 3 is a lead wire, and arrow 4 is.
回転子の回転方向である。しかしながらこの従来の成層
刷子は各原料粉の焼成時の収縮率が相違するため層の境
界部に応力が発生し境界部よシ層状剥離又は層内にキレ
ン等が発生する欠点があシ。This is the rotation direction of the rotor. However, this conventional laminated brush has the disadvantage that stress is generated at the boundary between the layers due to the difference in shrinkage rate during firing of each raw material powder, resulting in delamination of the layer at the boundary or generation of dust within the layer.
又粉末同士を積層するため２層の境界部が図示されるよ
うに直線状にならず整流改善効果が予想したほどではな
いという欠点があった。Furthermore, since the powders are layered, the boundary between the two layers does not form a straight line as shown in the figure, and the rectification improvement effect is not as great as expected.
（発明の目的）
本発明は上記した成層刷子の欠点を改良し、良好な整流
作用を有する電刷子を提供することを目的とする。(Objective of the Invention) An object of the present invention is to improve the above-described drawbacks of the laminated brush and to provide an electric brush having a good rectifying effect.
（発明の構成）
本発明は、厚さ方向に、樹脂含浸した炭素繊維シートと
電刷子原料粉の層とを交互に積層成形し焼成してなる電
刷子に関する。(Structure of the Invention) The present invention relates to an electric brush formed by laminating and firing layers of resin-impregnated carbon fiber sheets and electric brush raw material powder alternately in the thickness direction.
本発明において樹脂含浸した炭素繊維シートは。In the present invention, the carbon fiber sheet impregnated with resin is.
炭素繊維の布の１枚に、又は複数枚積重ねたものに、フ
ェノール樹脂、フラン樹脂、エポキシ樹脂等の熱硬化性
樹脂のフェスを含浸したものが好ましい。電刷子原料粉
としては、電解銅粉等の金属粉、金鵜粉及び黒鉛粉との
混合粉、黒鉛粉をバインダーのフェノール樹脂フェスや
タールピッチで混練後粉砕した電刷子素材の成形粉等で
ある。Preferably, one carbon fiber cloth or a stack of carbon fiber cloths is impregnated with a thermosetting resin face such as phenol resin, furan resin, or epoxy resin. Electric brush raw material powders include metal powder such as electrolytic copper powder, mixed powder with gold powder and graphite powder, and molded powder of electric brush material made by kneading graphite powder with a binder phenol resin face or tar pitch and then pulverizing it. be.
本発明の電刷子は１例えば通常の一体成形用プレスによ
り囚ダイス底部に樹脂含浸した炭素繊維シートを敷き、
・その上に電刷子原料粉を流し込んでリード線と一体成
形する。（Ｂ）ダイス底部に樹脂含浸した炭素繊維シー
トを敷いた後、電刷子原料粉１次いで樹脂含浸した炭素
繊維シートの積層を１回又は複数回繰り返してからリー
ド線を埋込んで成形する。次いで例えば７００℃で焼成
して第２図に示すような厚さ方向の下面に炭素繊維、シ
ート６の密着した電刷子、第１図に示すような炭素繊維
シート６が厚さ方向の上下面及び中間部に密着した電刷
子等を得る。The electric brush of the present invention includes 1, for example, a resin-impregnated carbon fiber sheet is spread on the bottom of a die using a conventional press for integral molding;
・Pour electric brush raw material powder on top of it and mold it integrally with the lead wire. (B) After laying a resin-impregnated carbon fiber sheet on the bottom of the die, stacking the electric brush raw material powder first and then the resin-impregnated carbon fiber sheet is repeated one or more times, and then lead wires are embedded and molded. Then, it is fired at, for example, 700°C, and the carbon fiber sheet 6 is attached to the electric brush on the lower surface in the thickness direction as shown in FIG. 2, and the carbon fiber sheet 6 as shown in FIG. And obtain an electric brush etc. that is in close contact with the intermediate part.
（作用）
上記のようにして得られた電刷子は炭素繊維シート中の
樹脂が、比較的電気抵抗の高い炭素繊維を結合し、更に
炭素繊維シートと電刷子原料粉成形体の焼成された電気
抵抗の低い層との密着を強化し１回転型機に装着した場
合の短絡電流を小さくする。(Function) In the electric brush obtained as described above, the resin in the carbon fiber sheet binds carbon fibers with relatively high electrical resistance, and the electric It strengthens the adhesion with the low-resistance layer and reduces the short-circuit current when installed in a single-rotation machine.
（実施例） 次に実施例を説明する。(Example) Next, an example will be described.
炭素繊維の布（日本カイノール社製、商品名Ｎ５０１）
にフェノール樹脂フェス（日立化成工業製ＶＰ−１１Ｎ
）を真空含浸し風乾後、４０℃で２時間、６５℃で１時
間乾燥して樹脂含浸した炭素繊維シート（以下含浸シー
トと呼ぶ）を得。Carbon fiber cloth (manufactured by Nippon Kynor Co., Ltd., product name N501)
Phenol resin face (manufactured by Hitachi Chemical Co., Ltd. VP-11N)
) was vacuum-impregnated and air-dried, and then dried at 40°C for 2 hours and 65°C for 1 hour to obtain a resin-impregnated carbon fiber sheet (hereinafter referred to as an impregnated sheet).
ｌｌＸ１６ｍｍに切断したシートを３枚用意した（内２
枚は更に第３図に示すようにリード線を入れる孔７を打
抜いた）。電刷子原料粉として電解銅粉（福田金属箔粉
工業製、商品名ＣＥ−８）７０重量％及び鱗状黒鉛（日
本黒鉛工業Ｍ、商品名ＣＢ−１００）３０重量−の混合
粉を用意した。Three sheets cut to 16mm x 16mm were prepared (2 of them were
The sheet was further punched with holes 7 for inserting lead wires as shown in FIG. 3). As electric brush raw material powder, a mixed powder of 70% by weight of electrolytic copper powder (manufactured by Fukuda Metal Foil & Powder Industries, trade name CE-8) and 30% by weight of scaly graphite (manufactured by Nippon Graphite Industries M, trade name CB-100) was prepared.
メカニカルプレスに断面１１Ｘ１６ａｍのダイス及び上
下パンチからなる金型を装着し、第４図に示すようにダ
イス９及び下パンチ１０で囲まれる空所の下パンチ１０
の上に、孔なしシート５．電刷子原料粉８．孔ありシー
ト５′、電刷子原料粉８゜孔あシシート５′の順にシー
ト及び電刷子原料粉を積み重ね２次いで上パンチ内から
リード線３を孔７を通しながら上下パンチを下降及び上
昇させて４トン／ａｎ″の圧力で一体成形を行なった。A die consisting of a die with a cross section of 11 x 16 am and an upper and lower punch is attached to a mechanical press, and a lower punch 10 is placed in the empty space surrounded by the die 9 and the lower punch 10 as shown in FIG.
On top of the non-perforated sheet 5. Electric brush raw material powder8. The sheets and electric brush raw material powder are stacked in the order of perforated sheet 5', electric brush raw material powder 8° perforated sheet 5', and then the upper and lower punches are lowered and raised while passing the lead wire 3 through the hole 7 from inside the upper punch. Integral molding was performed at a pressure of 4 tons/an''.
成形品は窒素ガス雰囲気中で７００℃で焼成して厚さ７
■Ｘ４＠１１１ｍＸ長さ１６ｍｍの電刷子を得た。The molded product is baked at 700℃ in a nitrogen gas atmosphere to a thickness of 7.
■An electric brush measuring 4×111 m×16 mm in length was obtained.
実施例及び比較例で得られた電刷子を１２ｖ。The electric brushes obtained in Examples and Comparative Examples were used at 12V.
１鼎の自動車用スターターに組込み、１．５秒ＯＮ。Incorporated into a single car starter and turned on for 1.5 seconds.
８．５秒ＯＦＦの条件でスターターモーターの起動サイ
クル試験を実施し、そのときの整流火花を観察し、電刷
子摩耗量の測定を行なった。A starting cycle test of the starter motor was carried out under the condition of OFF for 8.5 seconds, rectifying sparks at that time were observed, and the amount of wear of the electric brush was measured.
その結果、整流火花は実施例の電刷子を使用した場合が
４〜５号、比較例の電刷子を使用したものが５〜６号、
電刷子摩耗量も第７図に示すように実施例の電刷子が少
なく、実施例の電刷子は整流が優れることが示される。As a result, the rectifying sparks were No. 4 to 5 when the electric brush of the example was used, No. 5 to No. 6 when the electric brush of the comparative example was used, and
As shown in FIG. 7, the amount of electric brush wear was also small in the electric brush of the example, indicating that the electric brush of the example had excellent rectification.
（発明の効果）
本発明によれば従来の層状刷子のような眉間剥離やキレ
ンを生ずることがないと共に、電刷子の厚さを変更する
ことなく短絡電流を小さくできるので回転電機の整流性
能が向上し、自動車用、家電用等の小型電動機への適用
が可能となる。(Effects of the Invention) According to the present invention, there is no possibility of peeling between the eyebrows or cracking unlike conventional layered brushes, and the short circuit current can be reduced without changing the thickness of the electric brush, which improves the rectification performance of rotating electric machines. This makes it possible to apply it to small electric motors for automobiles, home appliances, etc.
第１図及び第２図は本発明の電刷子の例を示す断面図、
第３図及び第４図は本発明の実施例における電刷子の樹
脂含浸した炭素繊維シートの正面図及び成形方法を説明
する断面図、第５図及び第６図は従来の成層刷子の断面
図、第７図はスターターの起動回数と電刷子摩耗量を示
す断面図である。
符号の説明
１・・・高電気抵抗原料粉
２・・・低電気抵抗原料粉
３・・・リード線 ４・・・回転子の回転方向５
．５′・・・シート ６・・・炭素繊維シート７・
・・孔 ８・・・電刷子原料粉９・・・ダ
イス １０・・・下パンチ１１・・・上パンチ
第１（２） 茅２０
第５■ ′Ｊ／！−４０
早 ７図
ス’１−ＩＡ漣２勧回数1 and 2 are cross-sectional views showing examples of the electric brush of the present invention,
FIGS. 3 and 4 are front views of a resin-impregnated carbon fiber sheet of an electric brush according to an embodiment of the present invention, and sectional views for explaining the molding method. FIGS. 5 and 6 are sectional views of a conventional laminated brush. , FIG. 7 is a sectional view showing the number of times the starter is started and the amount of wear of the electric brush. Explanation of symbols 1... High electrical resistance raw material powder 2... Low electrical resistance raw material powder 3... Lead wire 4... Rotation direction of rotor 5
．． 5'... Sheet 6... Carbon fiber sheet 7.
... Hole 8 ... Electric brush raw material powder 9 ... Dice 10 ... Lower punch 11 ... Upper punch No. 1 (2) Kaya 20 No. 5 ■ 'J/! -40 Early 7 Figures'1-IA Ren 2 times
Claims (1)
原料粉の層とを交互に積層成形し焼成してなる電刷子。1. An electric brush made by laminating resin-impregnated carbon fiber sheets and layers of electric brush raw material powder alternately in the thickness direction and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59275721A JPH0612674B2 (en) | 1984-12-28 | 1984-12-28 | Electric brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59275721A JPH0612674B2 (en) | 1984-12-28 | 1984-12-28 | Electric brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61158681A true JPS61158681A (en) | 1986-07-18 |
| JPH0612674B2 JPH0612674B2 (en) | 1994-02-16 |
Family
ID=17559450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59275721A Expired - Lifetime JPH0612674B2 (en) | 1984-12-28 | 1984-12-28 | Electric brush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612674B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6261284A (en) * | 1985-09-10 | 1987-03-17 | トライス株式会社 | Manufacture of laminate electric brush |
| JPS63218179A (en) * | 1987-03-05 | 1988-09-12 | トライス株式会社 | Brush used in liquid fuel |
| WO2005096474A1 (en) * | 2004-04-02 | 2005-10-13 | Namiki Seimitsu Houseki Kabusikikaisha | Electric contact mechanism for small motor |
| JP2006345593A (en) * | 2005-06-07 | 2006-12-21 | Matsushita Electric Ind Co Ltd | Laminated plastic brush |
| US8029296B2 (en) | 2000-02-07 | 2011-10-04 | Micro Contacts, Inc. | Carbon fiber electrical contacts formed of composite carbon fiber material |
| US8398413B2 (en) | 2000-02-07 | 2013-03-19 | Micro Contacts, Inc. | Carbon fiber electrical contacts formed of composite material including plural carbon fiber elements bonded together in low-resistance synthetic resin |
| JP2014033611A (en) * | 2012-07-31 | 2014-02-20 | Johnson Electric Sa | Method and apparatus for reducing noise or electromagnetic interference in rotating device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4869002A (en) * | 1971-12-20 | 1973-09-20 | ||
| JPS5624777A (en) * | 1979-08-06 | 1981-03-09 | Nihon Radiator Co | Brush for motor |
-
1984
- 1984-12-28 JP JP59275721A patent/JPH0612674B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4869002A (en) * | 1971-12-20 | 1973-09-20 | ||
| JPS5624777A (en) * | 1979-08-06 | 1981-03-09 | Nihon Radiator Co | Brush for motor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6261284A (en) * | 1985-09-10 | 1987-03-17 | トライス株式会社 | Manufacture of laminate electric brush |
| JPS63218179A (en) * | 1987-03-05 | 1988-09-12 | トライス株式会社 | Brush used in liquid fuel |
| US8029296B2 (en) | 2000-02-07 | 2011-10-04 | Micro Contacts, Inc. | Carbon fiber electrical contacts formed of composite carbon fiber material |
| US8398413B2 (en) | 2000-02-07 | 2013-03-19 | Micro Contacts, Inc. | Carbon fiber electrical contacts formed of composite material including plural carbon fiber elements bonded together in low-resistance synthetic resin |
| WO2005096474A1 (en) * | 2004-04-02 | 2005-10-13 | Namiki Seimitsu Houseki Kabusikikaisha | Electric contact mechanism for small motor |
| JP2006345593A (en) * | 2005-06-07 | 2006-12-21 | Matsushita Electric Ind Co Ltd | Laminated plastic brush |
| JP2014033611A (en) * | 2012-07-31 | 2014-02-20 | Johnson Electric Sa | Method and apparatus for reducing noise or electromagnetic interference in rotating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0612674B2 (en) | 1994-02-16 |
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