JPH08242559A - Carbon brush for rotary machine - Google Patents
Carbon brush for rotary machineInfo
- Publication number
- JPH08242559A JPH08242559A JP4314795A JP4314795A JPH08242559A JP H08242559 A JPH08242559 A JP H08242559A JP 4314795 A JP4314795 A JP 4314795A JP 4314795 A JP4314795 A JP 4314795A JP H08242559 A JPH08242559 A JP H08242559A
- Authority
- JP
- Japan
- Prior art keywords
- carbon brush
- commutator
- base material
- view
- rotating
- 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
Description
【０００１】[0001]
【産業上の利用分野】この発明は、発電機及び電動機等
の回転機器に使用されるカーボンブラシに関し、特に抵
抗損失が少なく、寿命及び整流性を含めた耐久性能に優
れた回転機器用カーボンブラシに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon brush used for rotating equipment such as a generator and an electric motor, and particularly to a carbon brush for rotating equipment which has a small resistance loss and is excellent in durability including life and rectifying property. It is about.
【０００２】[0002]
【従来の技術】近年の電動機は、小型・大容量化の傾向
を示し、それに使用されるカーボンブラシに求められる
性能課題も小型化・低抵抗化・低摩耗化・大容量化に伴
う高温対策等と厳しくなってきており、それに用いられ
るカーボンブラシは、小型ながら抵抗損が小さく、かつ
摩耗の少ないものが要求されるようになった。そこで、
最近では上記課題を解決するため、回転する整流子に接
触する接触面を除く、カーボンブラシ基材の周面に、例
えば金、銀、銅等の電気良導性の金属被膜を施すことに
よって、カーボンブラシ基材の抵抗は高くても、カーボ
ンブラシ基材の周面に設けた金属被膜の作用でみかけの
抵抗を下げて全体の電気抵抗を低減し、またその結果、
抵抗発熱によるカーボンブラシの温度上昇を抑える事が
可能となった。2. Description of the Related Art In recent years, electric motors have tended to become smaller and have larger capacities, and the performance problems required for the carbon brushes used in them have also been high-temperature countermeasures due to miniaturization, low resistance, low wear, and large capacity. As the carbon brushes used for the carbon brushes are small, they have been required to have small resistance loss and little wear. Therefore,
Recently, in order to solve the above problems, except for the contact surface that contacts the rotating commutator, the peripheral surface of the carbon brush base material, for example, by applying an electrically conductive metal coating such as gold, silver, or copper, Even if the resistance of the carbon brush base material is high, the apparent resistance is reduced by the action of the metal coating provided on the peripheral surface of the carbon brush base material to reduce the overall electrical resistance, and as a result,
It has become possible to suppress the temperature rise of the carbon brush due to resistance heating.
【０００３】図１４は、例えば特開平５−１８２７３３
号公報に示された従来のカーボンブラシを示す斜視図、
図１５はカーボンブラシを整流子に圧接させた状態を示
す上面図、図１６はその側面図である。図において、１
はカーボンブラシ基材、２はカーボンブラシに電流を導
く役目のリード線、３は整流子６の銅片に摺動接触する
カーボンブラシの先端面、４はカーボンブラシ基材１の
周面を覆う電気良導性の金属被膜、５はカーボンブラシ
が整流子６へ良好に摺動接触するためのコイル状のば
ね、７は整流子の銅片、８は整流子６の回転軸、Ａは整
流子６の回転方向を示す矢印である。FIG. 14 shows, for example, Japanese Unexamined Patent Publication No. 5-182733.
Perspective view showing a conventional carbon brush shown in Japanese Patent Publication,
FIG. 15 is a top view showing a state where a carbon brush is pressed against a commutator, and FIG. 16 is a side view thereof. In the figure, 1
Is a carbon brush base material, 2 is a lead wire for guiding a current to the carbon brush, 3 is a tip surface of the carbon brush which is in sliding contact with the copper piece of the commutator 6, and 4 is a peripheral surface of the carbon brush base material 1. A metal film having good electrical conductivity, 5 is a coiled spring for allowing the carbon brush to slidably contact the commutator 6, 7 is a copper piece of the commutator, 8 is a rotating shaft of the commutator 6, and A is commutator. It is an arrow which shows the rotation direction of the child 6.
【０００４】次に動作について説明する。カーボンブラ
シは回転体である整流子６との間で電流通電を行い、発
電機あるいは電動機においては、カーボンブラシによっ
て短絡されているコイルの電流が、接触期間中に電気的
に１８０℃反転する際に流れる短絡電流を抑える作用を
行なっている。Next, the operation will be described. The carbon brush conducts current with the commutator 6, which is a rotating body, and in the generator or the electric motor, when the current of the coil short-circuited by the carbon brush is electrically reversed by 180 ° C. during the contact period. It has the function of suppressing the short-circuit current flowing to the.
【０００５】しかしながら、カーボンブラシ全面に金属
被膜を施すと整流が悪くなる傾向にある。これは、抵抗
の低い金属被膜に負荷電流が集中するためで、特に整流
子の回転方向と直交する接触面では短絡電流の急激集中
により磁束の変化の遅れが火花を発生させる要因の一つ
となっている。However, if the entire surface of the carbon brush is coated with a metal film, the rectification tends to be deteriorated. This is because the load current concentrates on the metal film with low resistance, and especially on the contact surface orthogonal to the rotating direction of the commutator, the delay of the change in magnetic flux due to the rapid concentration of the short-circuit current is one of the factors that cause sparks. ing.
【０００６】通常、カーボンブラシと整流子との間で負
荷電流が適当に分散していれば、火花の発生する機会は
生じないが、寿命末期でのカーボンブラシと整流子の接
触状態のように、カーボンブラシの抵抗が著しく低くな
った場合は（初期から末期に向かってカーボンブラシの
長さが短くなった分、抵抗値も低くなる）、負荷電流は
電機子コイルのインダクタンスがあるため急に減少する
ことが難しく、電流密度は極めて過大なものとなる。す
ると、カーボンブラシと整流子の温度は急激に上昇し、
ついには接触部分である整流子の銅片は融点に達し溶融
を始め、接触部分から引き出されて溶融橋絡を形成す
る。この溶融橋絡の開離現象が連続しておこれば、回転
方向に向ってその長さが伸びて最終的には、これを支え
きれず気化して、カーボンブラシとの接触端部（図１５
に示す矢印Ｂあたり）より火花が発生してしまう。この
現象は、金属被膜の抵抗とカーボンブラシの抵抗との差
が１００００Ω以上ある場合におこりやすい。[0006] Normally, if the load current is appropriately dispersed between the carbon brush and the commutator, no chance of sparking occurs, but like the contact state between the carbon brush and the commutator at the end of life, , If the resistance of the carbon brush becomes extremely low (the length of the carbon brush becomes shorter from the beginning to the end, the resistance value also becomes lower), the load current suddenly changes due to the inductance of the armature coil. It is difficult to reduce, and the current density becomes extremely large. Then, the temperature of the carbon brush and commutator rises rapidly,
Finally, the copper piece of the commutator, which is the contact portion, reaches the melting point and starts melting, and is drawn out from the contact portion to form a molten bridge. If the separation phenomenon of the melted bridge occurs continuously, its length extends in the direction of rotation and eventually it cannot vaporize because it cannot support it (Fig. 15
Around the arrow B shown in (), a spark is generated. This phenomenon is likely to occur when the difference between the resistance of the metal coating and the resistance of the carbon brush is 10,000 Ω or more.
【０００７】[0007]
【発明が解決しようとする課題】従来のカーボンブラシ
は以上のように構成されているので、火花の発生、整流
不良による摩耗等によって、安定な整流が得られない、
カーボンブラシの寿命が短くなる等の問題点があった。
この発明は上記のような問題点を解決するためになされ
たもので、カーボンブラシの低抵抗化・大容量化に伴う
高温対策ができるとともに、安定整流に伴う低摩耗化・
入力の安定化をより精度良く得られることを目的として
いる。Since the conventional carbon brush is constructed as described above, stable commutation cannot be obtained due to sparks, abrasion due to improper commutation, or the like.
There was a problem that the life of the carbon brush was shortened.
The present invention has been made to solve the above-mentioned problems, and it is possible to take measures against high temperature due to low resistance and large capacity of the carbon brush, and reduce wear due to stable rectification.
The purpose is to obtain input stabilization more accurately.
【０００８】[0008]
【課題を解決するための手段】この発明に係るカーボン
ブラシは、回転する整流子に先端面を接触させたカーボ
ンブラシ基材の周面に電気良導性の金属被膜を形成する
とともに該カーボンブラシ基材の前記整流子の回転方向
に平行な表面に形成された金属被膜をその先端面側から
後端面側にわたって帯状に除去しブラシ基材を露出した
ものである。A carbon brush according to the present invention has an electrically conductive metal coating formed on the peripheral surface of a carbon brush base material having a tip end surface in contact with a rotating commutator and the carbon brush. The brush base is exposed by removing the metal coating formed on the surface of the base parallel to the rotating direction of the commutator from the front end side to the rear end side in a strip shape.
【０００９】また、回転する整流子に先端面を接触させ
たカーボンブラシ基材の整流子の回転方向に平行な表面
にその先端面側から後端面側にわたって凹部を形成し、
該凹部内に電気良導性金属を埋設したものである。Further, a concave portion is formed from the front end side to the rear end side of the surface of the carbon brush base material, the front surface of which is in contact with the rotating commutator, parallel to the rotating direction of the commutator,
An electrically conductive metal is embedded in the recess.
【００１０】[0010]
【作用】この発明におけるカーボンブラシは、整流子の
回転方向に対して平行に設けられて表面に形成された金
属被膜を除去することにより、電気良導性の金属被膜で
形成された低抵抗部分とカーボン基材で形成された高抵
抗部分とに分離され、カーボンブラシの表面に負荷電流
が集中することを防ぐ。The carbon brush according to the present invention has a low resistance portion formed of a metal film having good electrical conductivity by removing the metal film formed on the surface of the carbon brush in parallel with the rotating direction of the commutator. And a high resistance portion formed of a carbon base material to prevent the load current from concentrating on the surface of the carbon brush.
【００１１】また、整流子の回転方向に平行な表面にそ
の先端面側から後端面側にわたって凹部を形成し、該凹
部内に電気良導性金属を埋設したことにより、低抵抗部
分と高抵抗部分とに分離され、カーボンブラシ表面に負
荷電流が集中することを防ぐとともに、抵抗損失が少な
く、温度上昇が小さくて電流密度を高くできる。Further, by forming a concave portion on the surface parallel to the rotating direction of the commutator from the front end surface side to the rear end surface side and burying the electrically conductive metal in the concave portion, a low resistance portion and a high resistance portion are formed. The load current is prevented from concentrating on the surface of the carbon brush, and the resistance loss is small, the temperature rise is small, and the current density can be increased.
【００１２】[0012]
実施例１．以下、この発明の一実施例を図について説明
する。図１はこの発明の一実施例を示すカーボンブラシ
の斜視図、図２はその断面図、図３はカーボンブラシを
例えば電気掃除機用の電動機に組み込んだ状態を示す側
部断面図である。また、図４はカーボンブラシ保持部の
構成を示す側面図、図５はその断面図である。図におい
て、１はカーボンブラシ基材、２はカーボンブラシに電
流を導くリード線、３は整流子に摺動接触するカーボン
ブラシの先端面、４は電気良導性の金属被膜、９は整流
子６の回転方向に平行に設けられ整流子６の複数の金属
片７と接触する上部表面または下部表面、１０は整流子
６の回転方向に直交に設けられた回転方向側の側部表面
である。また、１１は上部表面と下部表面に各々設けら
れた溝部であり、先端面側から後端面側にわたって帯状
に設けられている。また、１２は電動機の回転体である
電機子、１３は整流子６と摺動接触するカーボンブラシ
をバネにより加圧し、静止体と回転体との間に安定した
電力を伝達するカーボンブラシ保持器であり、電動機の
フレームにねじ等により固定されている。１４はカーボ
ンブラシ保持器のカーボンブラシとの接続部に設けた凸
部で、凹部形状を持つカーボンブラシと嵌合すること
で、カーボンブラシの遊び及びチャタリングを防止し、
さらに安定した整流環境を確保することができる。Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view of a carbon brush showing an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a side sectional view showing a state in which the carbon brush is incorporated in an electric motor for an electric vacuum cleaner, for example. 4 is a side view showing the structure of the carbon brush holder, and FIG. 5 is a sectional view thereof. In the figure, 1 is a carbon brush base material, 2 is a lead wire for conducting an electric current to the carbon brush, 3 is a tip surface of the carbon brush which is in sliding contact with the commutator, 4 is a metal film having good electrical conductivity, and 9 is a commutator. An upper surface or a lower surface 10 which is provided in parallel to the rotation direction of 6 and contacts the plurality of metal pieces 7 of the commutator 6 is a side surface on the rotation direction side which is provided orthogonal to the rotation direction of the commutator 6. . Reference numeral 11 is a groove portion provided on each of the upper surface and the lower surface, and is provided in a band shape from the front end surface side to the rear end surface side. Further, 12 is an armature that is a rotating body of the electric motor, and 13 is a carbon brush holder that pressurizes a carbon brush slidingly contacting the commutator 6 with a spring to transmit stable electric power between the stationary body and the rotating body. And is fixed to the frame of the electric motor with screws or the like. 14 is a convex portion provided at the connecting portion of the carbon brush holder with the carbon brush, and by fitting with the carbon brush having a concave shape, play and chattering of the carbon brush are prevented,
Furthermore, a stable rectification environment can be secured.
【００１３】次に動作について説明する。カーボンブラ
シは回転体である電機子の整流子６との間で電流通電を
行い、発電機あるいは電動機においてはカーボンブラシ
によって短絡されている電機子コイルの電流が、接触期
間中に電気的に電流取出し方向を１８０度反転する際に
流れる短絡電流を抑える作用を行っている。これは、例
えば電機子の各コイルが１回転ごとに２回カーボンブラ
シで短絡され、その都度コイル内の電流は＋Ｉから−Ｉ
へ、次には−Ｉから＋Ｉへと方向を反転させているため
で、その時間は電機子コイルがカーボンブラシで短絡さ
れた瞬間から始まり、短絡が解除される時に終るもの
で、極めて短時間である。Next, the operation will be described. The carbon brush conducts current with the commutator 6 of the armature, which is a rotating body, and in the generator or the electric motor, the current of the armature coil short-circuited by the carbon brush is an electric current during the contact period. It acts to suppress the short-circuit current that flows when the take-out direction is reversed by 180 degrees. This means that, for example, each coil of the armature is short-circuited twice with a carbon brush every one rotation, and the current in the coil is + I to -I each time.
Because the direction is reversed from -I to + I next time, the time starts from the moment when the armature coil is shorted by the carbon brush and ends when the short circuit is released, which is an extremely short time. Is.
【００１４】本実施例におけるカーボンブラシは、整流
子６の回転方向に平行に設けられたカーボンブラシ基材
１の上下表面９に施した金属被膜４を先端面側から後端
面側にわたって帯状に除去し、カーボンブラシ基材を露
出させた構成となっている。これにより、上下表面９が
低抵抗部分と高抵抗部分に分離・層別され、回転方向成
分に負荷電流が集中することを防ぎ、短絡電流を小さく
し、磁束の変化に遅れないようにすることができ、整流
作用を改善することができる。In the carbon brush of this embodiment, the metal coating 4 applied to the upper and lower surfaces 9 of the carbon brush base material 1 provided in parallel with the rotating direction of the commutator 6 is stripped from the front end surface side to the rear end surface side. However, the carbon brush base material is exposed. As a result, the upper and lower surfaces 9 are separated and layered into a low resistance portion and a high resistance portion, the load current is prevented from concentrating on the rotational direction component, the short-circuit current is reduced, and the change of the magnetic flux is not delayed. Therefore, the rectifying function can be improved.
【００１５】また、上下表面は、例えばカーボンブラシ
全周面に金属被膜を被覆した後、次の工程で先端面のみ
被覆を切削等にて取り除き、その次の工程で回転方向に
対して平行に設けられた上下表面に施した金属被膜を先
端面側から終端面側にわたって帯状に除去しカーボンブ
ラシ基材を露出させて形成する方法がある。しかし、こ
れに限ったものではなく、カーボンブラシ基材を露出さ
せる部分に予めマスキングして金属被膜を施すことで、
カーボンブラシ基材を露出してもよい。なお、削除幅に
ついては、あまり削除すると金属被膜によるみかけの抵
抗値を下げてしまい、モータ効率まで低下してしまう恐
れがあるので、例えば、削除幅を上下接触面のそれぞれ
の表面積の１／２以下にすることが図１３のグラフより
実験的に検証されており望ましい。また、除去する金属
被膜の長さは、カーボンブラシの先端から後端の全長に
わったて除去されなくても、カーボンブラシが実際に使
用される部分の金属被膜が削除されていればよい。The upper and lower surfaces, for example, after the metal brush is coated on the entire surface of the carbon brush, only the tip surface is removed by cutting or the like in the next step, and in the next step, it is made parallel to the rotation direction. There is a method in which the metal coating film provided on the upper and lower surfaces provided is removed in a strip shape from the front end surface side to the end surface side to expose the carbon brush base material. However, the present invention is not limited to this, and by previously masking the portion where the carbon brush base material is exposed and applying a metal coating,
The carbon brush substrate may be exposed. As for the deletion width, if it is deleted too much, the apparent resistance value due to the metal film may be lowered, and the motor efficiency may be lowered. Therefore, for example, the deletion width should be 1/2 of the surface area of each of the upper and lower contact surfaces. The following is desirable because it has been experimentally verified from the graph of FIG. Further, the length of the metal coating to be removed does not need to be removed over the entire length from the front end to the rear end of the carbon brush, as long as the metal coating at the portion where the carbon brush is actually used may be removed.
【００１６】実施例２．図６は実施例２のカーボンブラ
シを示す断面図、図７はカーボンブラシ保持部の構成を
示す側面図、図８はその断面図である。１５はカーボン
ブラシ基材１の上下表面９の両端部に施した金属被膜を
先端面側から終端面側に向けて除去した切り欠き部であ
る。この構成により、実施例１と同等の効果を得ること
ができる。１６はカーボンブラシ保持器１３のカーボン
ブラシ１との接続部に設けた突部で、カーボンブラシ１
の上下接触面９の切り欠き部１５と嵌合することで、カ
ーボンブラシ１の遊び及びチャタリングを防止し、さら
に安定した整流環境を確保することができる。なお、削
除幅については実施例１同様、両端部の切り欠き部を合
わせて上下接触面全面の略１／２以下にすることが望ま
しい。Example 2. FIG. 6 is a sectional view showing a carbon brush of Example 2, FIG. 7 is a side view showing the configuration of a carbon brush holding portion, and FIG. 8 is a sectional view thereof. Reference numeral 15 is a notch formed by removing the metal coating applied to both ends of the upper and lower surfaces 9 of the carbon brush base material 1 from the front end surface side toward the end surface side. With this configuration, the same effect as that of the first embodiment can be obtained. Reference numeral 16 is a protrusion provided at the connecting portion of the carbon brush holder 13 with the carbon brush 1.
By fitting with the notch 15 of the upper and lower contact surfaces 9, play and chattering of the carbon brush 1 can be prevented, and a more stable rectifying environment can be secured. As with the first embodiment, it is desirable that the width of deletion be about 1/2 or less of the entire surface of the upper and lower contact surfaces by combining the cutouts at both ends.
【００１７】実施例３．図９は実施例３のカーボンブラ
シを示す断面図である。１７はカーボンブラシ基材１の
上下接触面９に施した金属被膜を先端面側から後端面側
にわたって略１／３面を除去した切り欠き部であり、実
施例１、２と同等の効果を得ることができる。また、カ
ーボンブラシ保持器の形状に関しては上記実施例１、２
同様、カーボンブラシ保持器に凸部を設け、カーボンブ
ラシの切り欠き部１７と嵌合さすることでカーボンブラ
シ１の遊び及びチャタリングを防止し、さらに安定した
整流環境を確保することができる。なお、削除幅につい
ては実施例１同様、両端部の切り欠き部を合わせて上下
接触面全面の略１／２以下にすることが望ましい。Embodiment 3. FIG. 9 is a cross-sectional view showing a carbon brush of Example 3. Reference numeral 17 denotes a notch formed by removing a metal coating applied to the upper and lower contact surfaces 9 of the carbon brush base material 1 from the front end surface side to the rear end surface side, and has the same effect as in Examples 1 and 2. Obtainable. In addition, regarding the shape of the carbon brush holder, the above-mentioned first and second embodiments are used.
Similarly, by providing a convex portion on the carbon brush holder and engaging with the cutout portion 17 of the carbon brush, play and chattering of the carbon brush 1 can be prevented, and a more stable rectifying environment can be secured. As with the first embodiment, it is desirable that the width of deletion be about 1/2 or less of the entire surface of the upper and lower contact surfaces by combining the cutouts at both ends.
【００１８】実施例４．図１０は、実施例４のカーボン
ブラシを示す断面図である。図１１はカーボンブラシ保
持器の構成を示す側面図、図１２はその断面図である。
図において、１８はカーボンブラシ基材の上下表面の先
端面側から終端面側にわたって設けた凹部、１９は電気
良導性の金属であり、金属１９を凹部１８内に埋設して
カーボンブラシを形成する。これにより、上下表面は、
金属部分の低抵抗部と、カーボンブラシ基材の高抵抗部
に分離させることにより、整流作用が改善され、さら
に、抵抗損失が少なく、温度上昇が小さくて電流密度を
高くできるカーボンブラシを形成することができる。Example 4. FIG. 10 is a cross-sectional view showing a carbon brush of Example 4. FIG. 11 is a side view showing the configuration of the carbon brush holder, and FIG. 12 is a sectional view thereof.
In the figure, 18 is a recessed portion provided from the front end surface side to the end surface side of the upper and lower surfaces of the carbon brush base material, and 19 is a metal having good electrical conductivity. A metal 19 is embedded in the recessed portion 18 to form a carbon brush. To do. As a result, the upper and lower surfaces are
By separating the low resistance part of the metal part and the high resistance part of the carbon brush base material, a rectifying action is improved, and further, a carbon brush that has a small resistance loss, a small temperature rise and a high current density is formed. be able to.
【００１９】[0019]
【発明の効果】以上のように、この発明によれば、回転
する整流子に先端面を接触させたカーボンブラシ基材の
周面に電気良導性の金属被膜を形成するとともに該カー
ボンブラシ基材の前記整流子の回転方向に平行な表面に
形成された金属被膜をその先端面側から後端面側にわた
って帯状に除去しブラシ基材を露出したので、表面に負
荷電流が集中することを防ぎ、磁束の変化に遅れのない
ようにすることができるので整流作用を改善できる。よ
って、安定整流に伴うカーボンブラシの低摩耗化及び耐
久性の向上、また、電動機入力の安定化をより良く得ら
れる効果がある。As described above, according to the present invention, an electrically conductive metal coating is formed on the peripheral surface of a carbon brush base material whose tip end surface is brought into contact with a rotating commutator, and the carbon brush base material is formed. Since the metal film formed on the surface of the material parallel to the rotation direction of the commutator is stripped from the front end surface side to the rear end surface side to expose the brush base material, concentration of load current on the surface is prevented. Since the change of the magnetic flux can be delayed, the rectifying action can be improved. Therefore, there is an effect that the carbon brush is less worn and the durability is improved due to the stable rectification, and the electric motor input is more stabilized.
【００２０】また、回転する整流子に先端面を接触させ
たカーボンブラシ基材の前記整流子の回転方向に平行な
表面にその先端面側から後端面側にわたって凹部を形成
し、該凹部内に電気良導性金属を埋設したので、上記と
同様の効果があるととに、抵抗損失が少なく、温度上昇
が小さくで電流密度を高くできるカーボンブラシを形成
することができる。Further, a concave portion is formed on the surface of the carbon brush base material having the tip end surface in contact with the rotating commutator parallel to the rotation direction of the commutator from the tip end surface side to the rear end surface side, and the concave portion is formed in the concave portion. Since the electrically conductive metal is embedded, the carbon brush having the same effect as described above and having a small resistance loss, a small temperature rise and a high current density can be formed.
【図１】この発明の実施例１によるカーボンブラシを示
す斜視図である。FIG. 1 is a perspective view showing a carbon brush according to a first embodiment of the present invention.
【図２】この発明の実施例１によるカーボンブラシを示
す断面図である。FIG. 2 is a sectional view showing a carbon brush according to a first embodiment of the present invention.
【図３】この発明の実施例１によるカーボンブラシを組
み込んだ状態を示す側部断面図である。FIG. 3 is a side sectional view showing a state in which the carbon brush according to the first embodiment of the present invention is incorporated.
【図４】この発明の実施例１によるカーボンブラシ保持
部の側面図である。FIG. 4 is a side view of the carbon brush holder according to the first embodiment of the present invention.
【図５】この発明の実施例１によるカーボンブラシ保持
部の断面図である。FIG. 5 is a sectional view of a carbon brush holder according to Embodiment 1 of the present invention.
【図６】この発明の実施例２によるカーボンブラシを示
す断面図である。FIG. 6 is a sectional view showing a carbon brush according to a second embodiment of the present invention.
【図７】この発明の実施例２によるカーボンブラシ保持
部の側面図である。FIG. 7 is a side view of a carbon brush holder according to a second embodiment of the present invention.
【図８】この発明の実施例２によるカーボンブラシ保持
部の断面図である。FIG. 8 is a sectional view of a carbon brush holder according to a second embodiment of the present invention.
【図９】この発明の実施例３によるカーボンブラシを示
す断面図である。FIG. 9 is a sectional view showing a carbon brush according to a third embodiment of the present invention.
【図１０】この発明の実施例４によるカーボンブラシを
示す断面図である。FIG. 10 is a sectional view showing a carbon brush according to a fourth embodiment of the present invention.
【図１１】この発明の実施例４によるカーボンブラシ保
持部の側面図である。FIG. 11 is a side view of a carbon brush holder according to a fourth embodiment of the present invention.
【図１２】この発明の実施例４によるカーボンブラシ保
持部の断面図である。FIG. 12 is a sectional view of a carbon brush holder according to a fourth embodiment of the present invention.
【図１３】この発明の実施例によるカーボンブラシの効
率対比グラフである。FIG. 13 is an efficiency comparison graph of a carbon brush according to an embodiment of the present invention.
【図１４】この発明の従来技術を示すカーボンブラシの
斜視図である。FIG. 14 is a perspective view of a carbon brush showing a conventional technique of the present invention.
【図１５】この発明の従来技術を示すカーボンブラシと
整流子の上面図である。FIG. 15 is a top view of a carbon brush and a commutator showing a conventional technique of the present invention.
【図１６】この発明の従来技術を示すカーボンブラシと
整流子の断面図である。FIG. 16 is a sectional view of a carbon brush and a commutator showing a conventional technique of the present invention.
１ カーボンブラシ基材 ２ リード線 ３ カーボンブラシの先端面 ４ 金属被膜 ５ ばね ６ 整流子 ７ 銅片 ８ 回転軸 ９ 上下表面 １０ 側部表面 １１ 溝部 １２ 電機子 １３ カーボンブラシ保持器 １４ 凸部 １５ 切り欠き部 １６ 突部 １７ 切り欠き部 １８ 凹部 １９ 金属 DESCRIPTION OF SYMBOLS 1 Carbon brush base material 2 Lead wire 3 Carbon brush tip surface 4 Metal coating 5 Spring 6 Commutator 7 Copper piece 8 Rotating shaft 9 Upper and lower surface 10 Side surface surface 11 Groove 12 Armature 13 Carbon brush cage 14 Convex portion 15 Cutting Notch 16 Protrusion 17 Notch 18 Recess 19 Metal
Claims (2)
ーボンブラシ基材の周面に電気良導性の金属被膜を形成
するとともに該カーボンブラシ基材の前記整流子の回転
方向に平行な表面に形成された金属被膜をその先端面側
から後端面側にわたって帯状に除去しブラシ基材を露出
したことを特徴とする回転機器用カーボンブラシ。1. An electrically conductive metal coating is formed on the peripheral surface of a carbon brush base material whose tip end surface is in contact with a rotating commutator, and the carbon brush base material is parallel to the rotating direction of the commutator. A carbon brush for a rotating machine, wherein a metal coating formed on the surface is removed in a band shape from the front end side to the rear end side to expose a brush base material.
ーボンブラシ基材の前記整流子の回転方向に平行な表面
にその先端面側から後端面側にわたって凹部を形成し、
該凹部内に電気良導性金属を埋設したことを特徴とする
回転機器用カーボンブラシ。2. A recess is formed on a surface of a carbon brush base material having a tip surface in contact with a rotating commutator parallel to the rotation direction of the commutator, from the tip surface side to the rear end surface side.
A carbon brush for rotating equipment, characterized in that an electrically conductive metal is embedded in the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04314795A JP3354336B2 (en) | 1995-03-02 | 1995-03-02 | Carbon brush for rotating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04314795A JP3354336B2 (en) | 1995-03-02 | 1995-03-02 | Carbon brush for rotating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08242559A true JPH08242559A (en) | 1996-09-17 |
| JP3354336B2 JP3354336B2 (en) | 2002-12-09 |
Family
ID=12655737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04314795A Expired - Fee Related JP3354336B2 (en) | 1995-03-02 | 1995-03-02 | Carbon brush for rotating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354336B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002001681A1 (en) * | 2000-06-28 | 2002-01-03 | Totankako Co., Ltd. | Carbon brush for electric machine |
| US7129615B2 (en) | 2003-04-09 | 2006-10-31 | Totankako Co., Ltd. | Metal coated carbon brush |
| CN104362490A (en) * | 2014-12-02 | 2015-02-18 | 湖南省华京粉体材料有限公司 | Method for preparing tungsten disulfide composite material for motor carbon brush |
-
1995
- 1995-03-02 JP JP04314795A patent/JP3354336B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002001681A1 (en) * | 2000-06-28 | 2002-01-03 | Totankako Co., Ltd. | Carbon brush for electric machine |
| US6909219B2 (en) | 2000-06-28 | 2005-06-21 | Totankako Co., Ltd. | Carbon brush for electric machine |
| US7129615B2 (en) | 2003-04-09 | 2006-10-31 | Totankako Co., Ltd. | Metal coated carbon brush |
| CN104362490A (en) * | 2014-12-02 | 2015-02-18 | 湖南省华京粉体材料有限公司 | Method for preparing tungsten disulfide composite material for motor carbon brush |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3354336B2 (en) | 2002-12-09 |
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