JPH0261535B2

JPH0261535B2 -

Info

Publication number: JPH0261535B2
Application number: JP57230656A
Authority: JP
Inventors: Fujimatsu Takiguchi
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1982-12-25
Filing date: 1982-12-25
Publication date: 1990-12-20
Also published as: JPS59118838A

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、
Au19.0〜21.0重量％、Pt4.0〜6.0重量％、Pd44.0
〜46.0重量％、Ag29.0〜31.0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、その点に着目
されて、Au、Pt、Pd、Ag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耐摩耗性が劣り、摩耗粉
が生じ易く、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
Au19.0〜21.0重量％、Pt4.0〜6.0重量％、Pd44.0
〜46.0重量％、Ag29.0〜31.0重量％のAu−Pt−
Pd−Agが95〜99.5重量％及び残部がSb、Mo、
Pb及びZnの少なくとも一種を合計で0.5〜5.0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Au19.0〜21.0重量％、Pt4.0〜6.0重量％、
Pd44.0〜46.0重量％、Ag29.0〜31.0重量％のAu
−Pt−Pd−Agが95〜99.5重量％及び残部がSb、
Mo、Pb及びZnの少なくとも一種を合計で0.5〜
5.0重量％としている理由は、前記従来の合金材
料の耐摩耗性、接触抵抗の安定性を向上すべく潤
滑剤となる酸化物を適量発生させる為で、Sb、
Mo、Pb及びZnのうち少なくとも一種を合計で
0.5重量％未満では酸化物の発生量が少なくて潤
滑剤としての効果を発揮できず、Sb、Mo、Pb及
びZnのうち少なくとも一種を合計で5.0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在とし、これにSb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, as sliding contact materials for brushes,
Au19.0~21.0wt%, Pt4.0~6.0wt%, Pd44.0
-46.0% by weight, Ag29.0-31.0% by weight were widely used (New contact materials edited by Japan Electronic Materials Technology Association, published by Kogyo Nichi-Nichi Shimbun on July 8, 1965) (See page 30). This alloy material has particularly excellent properties such as mechanical strength, corrosion resistance, and spring properties, and with this in mind, it is made with limited elements and contents such as Au, Pt, Pd, and Ag. It is. However, brush contacts made of this alloy material have poor abrasion resistance when sliding with the commutator, and are likely to generate abrasion powder, causing 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
Au19.0~21.0wt%, Pt4.0~6.0wt%, Pd44.0
~46.0 wt%, Ag29.0~31.0 wt% Au−Pt−
Pd-Ag is 95-99.5% by weight and the balance is Sb, Mo,
The total amount of at least one of Pb and Zn is 0.5 to 5.0% by weight. In the sliding contact material for brushes of the present invention, the composition ratio is 19.0 to 21.0% by weight of Au, 4.0 to 6.0% by weight of Pt,
Pd44.0~46.0wt%, Ag29.0~31.0wt%Au
-Pt-Pd-Ag is 95 to 99.5% by weight and the balance is Sb,
At least one of Mo, Pb and Zn in total of 0.5~
The reason why it is set at 5.0% by weight is to generate an appropriate amount of oxides that act as lubricants in order to improve the wear resistance and contact resistance stability of the conventional alloy materials.
At least one of Mo, Pb and Zn in total
If it is less than 0.5% by weight, the amount of oxide generated is small and it cannot be effective as a lubricant, and if the total amount of at least one of Sb, Mo, Pb and Zn exceeds 5.0% by weight, the amount of oxide generated is large. This results in high contact resistance and instability. Also
By setting the content of Au, Pt, Pd, and Ag 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 being impaired. be. Next, a conventional alloy material is used as a base material, and Sb is added thereto to obtain a brush sliding contact material having the composition shown in Example 1 of the table. Brush wire rods with a wire diameter of 0.7 mm were made using sliding contact materials for conventional brushes and conventional sliding contact materials for brushes, each of which was cut to a length of 8 mm, and two wires were placed in parallel with one end having a width of 10 mm and a length of 10 mm. 13mm, thickness 0.2mm
A brush contact was made by welding it to the base material and bending a 2R arc-shaped contact part at the other end. Then, each brush contact was brought into contact with a disc-shaped commutator, the commutator was rotated forward and backward, and a sliding test was conducted 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: Resistance load Rotation speed: 1000 rotations/divided speed: 130-120m/min Contact force: 100g 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、接触抵抗が同等に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Sb、Mo、Pb、Zn等の酸化物
が発生し、この酸化物が潤滑剤となり、耐摩耗性
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、
接触抵抗に変わらないからに他ならない。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と同等の接触抵抗
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 have significantly less wear than the conventional brush contacts, and the contact resistance is equally low and stable. This is 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 Sb, Mo, Pb, and Zn during sliding, and this oxidation This is because the substance acts as a lubricant and improves wear resistance. In addition, since the oxide is soft, it can be easily removed by sliding action.
This is because there is no change in contact resistance. 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 contact resistance equivalent to that of a conventional brush contact material.

Claims

[Claims]

1 Composition ratio: Au19.0-21.0% by weight, Pt4.0-6.0% by weight, Pd44.0-46.0% by weight, Ag29.0-31.0% by weight
Au-Pt-Pd-Ag is 95-99.5% by weight and the balance is
At least one of Sb, Mo, Pb and Zn in total
A sliding contact material for a brush, characterized in that the content is 0.5 to 5.0% by weight.