JPH0360891B2

JPH0360891B2 -

Info

Publication number: JPH0360891B2
Application number: JP57176913A
Authority: JP
Inventors: Fujimatsu Takiguchi
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1982-10-07
Filing date: 1982-10-07
Publication date: 1991-09-18
Also published as: JPS5967355A

Description

[Detailed description of the invention]

本発明は、刷子用摺動接点材料の改良に関す
る。従来、摺動接点材料としては各種材料が用いら
れ、とりわけ刷子用摺動接点材料としては、Au9
〜11重量％、Pt9〜11重量％、Pd34〜36重量％、
Ag29〜31重量％、Cu13〜15重量％、Zn0.5〜1.5
重量％より成る合金材料が広く用いられていた
（昭和40年７月８日に工業日日新聞社から発行さ
れた日本電子材料技術協会編の新しい接点材料第
30頁参照）。この合金材料は、とりわけ機械的強度、耐蝕
性、ばね性等の優れた特性を有し、各元素の複合
添加による相乗効果と相俟つて、特にAu、Ptに
よる耐蝕性、Ag、Pd、Cuによるばね性、Cu、
Pt、Auなどによる機械的強度、Znの鋳造性、加
工性の点に着目されて、Au、Pt、Pd、Ag、Cu、
Znなどの元素及び含有量を限定されて成るもの
である。然し乍ら、この合金材料で製作した刷子接点で
は、整流子との摺動時の機械的、電気的腐食によ
り酸化物が発生する為、耐摩耗性が劣り、摩耗粉
が生じ易く、接触抵抗が不安定でノイズ発生の原
因となつていた。本発明は、斯かる欠点を解消すべくなされたも
のであり、前記合金材料を基材としてこれに特定
の材料を僅かに添加させて、発生する酸化物を潤
滑剤とし、耐摩耗性を向上させた刷子用摺動接点
材料を提供せんとするものである。本発明の刷子用摺動接点材料は、組成比でAu9
〜11重量％、Pt9〜11重量％、Pd34〜36重量％、
Ag29〜31重量％、Cu13〜15重量％、Zn0.5〜1.5
重量％のAu−Pt−Pd−Ag−Cu−Znが95〜99.5
重量％及び残部がＢ、Si及びGeの少なくとも一
種を合計で0.5〜５重量％から成るものである。本発明の刷子用摺動接点材料に於いて、組成比
でAu9〜11重量％、Pt9〜11重量％、Pd34〜36重
量％、Ag29〜31重量％、Cu13〜15重量％、
Zn0.5〜1.5重量％のAu−Pt−Pd−Ag−Cu−Zn
が95〜99.5重量％及び残部がＢ、Si及びGeの少な
くとも一種を合計で0.5〜５重量％としている理
由は、前記従来の合金材料の耐摩耗性を向上すべ
く潤滑剤となる酸化物を適量発生させる為で、
Ｂ、Si及びGeのうち少なくとも一種を合計で0.5
重量％未満ではその効果を発揮できず、Ｂ、Si及
びGeのうち少なくとも一種を合計で５重量％を
超えると酸化物の発生量が多くなり、接触抵抗が
高くなり、その上不安定となるものである。ま
た、Au、Pt、Pd、Ag、Cu、Znの含有量は、前
記従来の合金材料の組成比に変更を加えない範囲
とすることにより、従来の合金材料の特性は損な
われることなく発揮されることとなるものであ
る。次に従来の合金材料を基材とし、これにＢを添
加し、表の実施例１に示す成分組成の刷子用摺動
接点材料とし、以下同様にして表に示す成分組成
の本発明による刷子用摺動接点材料と従来の刷子
用摺動接点材料を用いて夫々線径0.7mmの刷子線
材を作り、これを各々長さ８mmに切断し、２本並
列させて一端を幅10mm、長さ13mm、厚さ0.2mmの
台材に溶接し、他端に2Rの円弧状の接触部を曲
成して刷子接点を作つた。そして夫々の刷子接点
を円盤状の整流子に接触させ、整流子を正逆回転
させて下記の試験条件にて摺動試験を行い、摩耗
量及び接触抵抗を測定した処、下記の表の右欄に
示すような結果を得た。試験条件電流：直流0.6A 電圧：12V 負荷：抵抗負荷回転速度：1000回転／分周速：130〜120m／min 接触力：100g 試験時間：７時間 The present invention relates to improvements in sliding contact materials for brushes. Conventionally, various materials have been used as sliding contact materials, and in particular, Au9 is used as sliding contact material for brushes.
~11 wt%, Pt9~11 wt%, Pd34~36 wt%,
Ag29~31wt%, Cu13~15wt%, Zn0.5~1.5
Alloy materials consisting of
(See page 30). This alloy material has particularly excellent properties such as mechanical strength, corrosion resistance, and spring properties, and together with the synergistic effect of compound addition of each element, it has particularly good corrosion resistance due to Au and Pt, Ag, Pd, and Cu. Spring properties due to Cu,
Focusing on the mechanical strength of Pt, Au, etc., and the castability and workability of Zn, Au, Pt, Pd, Ag, Cu,
It is made by limiting elements such as Zn and their content. However, in brush contacts made of this alloy material, oxides are generated due to mechanical and electrical corrosion when sliding with the commutator, resulting in poor wear resistance, easy generation of wear particles, and poor contact resistance. It was unstable and caused noise. The present invention has been made to eliminate such drawbacks, and uses the above-mentioned alloy material as a base material and adds a small amount of a specific material to it, uses the generated oxide as a lubricant, and improves wear resistance. It is an object of the present invention to provide a sliding contact material for a brush that has a high quality. The sliding contact material for brushes of the present invention has a composition ratio of Au9
~11 wt%, Pt9~11 wt%, Pd34~36 wt%,
Ag29~31wt%, Cu13~15wt%, Zn0.5~1.5
Weight% Au-Pt-Pd-Ag-Cu-Zn is 95~99.5
The balance is a total of 0.5 to 5% by weight of at least one of B, Si, and Ge. In the sliding contact material for brushes of the present invention, the composition ratio is 9 to 11% by weight of Au, 9 to 11% by weight of Pt, 34 to 36% by weight of Pd, 29 to 31% by weight of Ag, 13 to 15% by weight of Cu,
Au-Pt-Pd-Ag-Cu-Zn with Zn0.5-1.5 wt%
The reason why the balance is 95 to 99.5% by weight and the balance is 0.5 to 5% by weight in total of at least one of B, Si, and Ge is that oxides that act as lubricants are In order to generate an appropriate amount,
A total of 0.5 of at least one of B, Si, and Ge
If it is less than 5% by weight, the effect cannot be exhibited, and if the total amount of at least one of B, Si, and Ge exceeds 5% by weight, the amount of oxides generated increases, contact resistance becomes high, and it becomes unstable. It is something. Furthermore, by setting the content of Au, Pt, Pd, Ag, Cu, and Zn within a range that does not change the composition ratio of the conventional alloy material, the characteristics of the conventional alloy material can be exhibited without loss. This is something that will happen. Next, a conventional alloy material is used as a base material, and B is added thereto to obtain a brush sliding contact material having the composition shown in Example 1 of the table. Brush wires with a wire diameter of 0.7 mm were made using sliding contact materials for commercial use and conventional sliding contact materials for brushes, each cut into 8 mm lengths, and two wires were placed in parallel with one end having a width of 10 mm and a length of 10 mm. A brush contact was made by welding to a base material of 13 mm and 0.2 mm thickness, and curving a 2R arc-shaped contact part on the other end. Then, each brush contact was brought into contact with a disk-shaped commutator, and the commutator was rotated in forward and reverse directions to perform a sliding test under the following test conditions, and the wear amount and contact resistance were measured. The results shown in the column were obtained. Test conditions Current: DC 0.6A Voltage: 12V Load: Resistive load Rotation speed: 1000 revolutions/min Circumferential speed: 130 to 120 m/min Contact force: 100 g Test time: 7 hours

【表】上記の表で明らかなように実施例１〜15の刷子
接点は従来例の刷子接点に比し摩耗量が著しく少
なく、接触抵抗が低く安定していることが判る。
これはひとえに実施例１〜15の刷子接点の刷子線
材を構成している本発明の刷子用摺動接点材料
が、摺動時にＢ、Si、Ge等の酸化物が発生し、
この酸化物が潤滑剤となり、耐凝着性が向上する
からに他ならない。また酸化物が軟らかい為、摺
動作用により容易に除去されるので、接触抵抗が
低く安定するからに他ならない。以上詳記した通り本発明による刷子用摺動接点
材料によれば、従来の刷子用摺動接点材料に比べ
著しく耐摩耗性に優れ、摩耗粉の発生量が極めて
少なく、ノイズの発生が殆んど無く、また従来の
刷子用摺動接点材料による場合よりも低く安定し
た接触抵抗を有する刷子接点を得ることができる
という効果がある。[Table] As is clear from the above table, it can be seen that the brush contacts of Examples 1 to 15 had significantly less wear than the conventional brush contacts, and the contact resistance was low and stable.
This is simply because the sliding contact material for brushes of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 15, generates oxides such as B, Si, and Ge during sliding.
This is because this oxide acts as a lubricant and improves adhesion resistance. In addition, since the oxide is soft, it can be easily removed by sliding action, and this is because the contact resistance is low and stable. As detailed above, the sliding contact material for brushes according to the present invention has significantly superior wear resistance compared to conventional sliding contact materials for brushes, generates extremely little wear powder, and generates almost no noise. This has the advantage that it is possible to obtain a brush contact having a lower and more stable contact resistance than when using conventional brush contact materials.

Claims

[Claims]

1 Composition ratio of Au9 to 11% by weight, Pt9 to 11% by weight,
Au-Pt-Pd-Ag-Cu with Pd34-36 wt%, Ag29-31 wt%, Cu13-15 wt%, Zn0.5-1.5 wt%
-95 to 99.5% by weight of Zn and the balance is B, Si and Ge
A sliding contact material for a brush, characterized in that the total amount of at least one of the following is 0.5 to 5% by weight.