JPH0329858B2

JPH0329858B2 -

Info

Publication number: JPH0329858B2
Application number: JP58117441A
Authority: JP
Priority date: 1983-06-29
Filing date: 1983-06-29
Publication date: 1991-04-25
Also published as: JPS609841A

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、
Au70.5〜72.5重量％、Pt7.5〜9.5重量％、Ag3.5
〜5.5重量％、Cu13.5〜15.5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115
頁参照）。この合金材料は、各元素の複合添加による相乗
効果によつて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、それらの点に着目され
て、Au、Pt、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、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
Au70.5〜72.5重量％、Pt7.5〜9.5重量％、Ag3.5
〜5.5重量％、Cu13.5〜15.5重量％、Zn0.5〜1.5重
量％のAu−Pt−Ag−Cu−Znが92〜98.5重量％及
び残部がIn1.0〜5.0重量％、Te、Ti、Li及びMg
の少なくとも一種を合計で0.5〜３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Au70.5〜72.5重量％、Pt7.5〜9.5重量％、
Ag3.5〜5.5重量％、Cu13.5〜15.5重量％、Zn0.5
〜1.5重量％のAu−Pt−Ag−Cu−Znが92〜98.5
重量％及び残部がIn1.0〜5.0重量％、Te、Ti、Li
及びMgの少なくとも一種を合計で0.5〜３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InとTe、Ti、Li、Mgの金属間化
合物の分散によつて硬くする為で、Inが1.0重量
％未満あるいは、Te、Ti、Li及びMg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、Inが５重量％を超えるかあるい
は、Te、Ti、Li及びMgのうち少なくとも一種
を合計で３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、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Inと
Te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,
Au70.5~72.5wt%, Pt7.5~9.5wt%, Ag3.5
An alloy material consisting of ~5.5% by weight, Cu13.5~15.5% by weight, and Zn0.5~1.5% by weight was widely used (JEOL, published by Kogyo Nichiichi Shimbun on July 8, 1966). New contact materials No. 115 compiled by the Materials Technology Association
(see page). This alloy material has excellent properties such as mechanical strength, corrosion resistance, and spring properties due to the synergistic effect of the combined addition of each element. , Zn, and other elements and their contents are limited. 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 provides a sliding contact material for brushes that uses the above-mentioned alloy material as a base material and has improved wear resistance by adding a small amount of a specific material to the alloy material. This is what we intend to provide. The sliding contact material for brushes of the present invention has a composition ratio of
Au70.5~72.5wt%, Pt7.5~9.5wt%, Ag3.5
~5.5 wt%, Cu13.5~15.5 wt%, Zn0.5~1.5 wt% Au-Pt-Ag-Cu-Zn is 92~98.5 wt% and the balance is In1.0~5.0 wt%, Te, Ti , Li and Mg
A total of 0.5 to 3% by weight of at least one of the following. In the sliding contact material for brushes of the present invention, the composition ratio is 70.5 to 72.5% by weight of Au, 7.5 to 9.5% by weight of Pt,
Ag3.5~5.5wt%, Cu13.5~15.5wt%, Zn0.5
~1.5 wt% Au-Pt-Ag-Cu-Zn 92-98.5
Weight% and balance is In1.0~5.0wt%, Te, Ti, Li
and at least one type of Mg in a total of 0.5 to 3% by weight
The reason for this is that in order to improve the wear resistance of the conventional alloy material, it is made harder by dispersing In and intermetallic compounds of Te, Ti, Li, and Mg. If the total amount of at least one of Ti, Li, and Mg is less than 0.5% by weight, the effect cannot be exhibited; If it exceeds % by weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become unstable. In addition, by setting the content of Au, Pt, 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 being impaired. This is the result. Next, a conventional alloy material is used as a base material, and In is added to this.
A sliding contact material for a brush having the composition shown in Example 1 in the table was prepared by adding Te, and a sliding contact material for a brush according to the present invention having the composition shown in the table and a conventional sliding contact for a brush were prepared in the same manner. Each wire diameter is 0.7mm using the material
Brush wire rods were made, each cut into 8 mm lengths, two wires were placed in parallel, one end was welded to a base material with a width of 10 mm, a length of 13 mm, and a thickness of 0.2 mm, and a 2R arc-shaped contact was made at the other end. I made a brush contact by bending the part. 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: 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１〜14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１〜14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、InとTe、Ti、Li及びMgの少なくとも一種の
金属間化合物の分散によつて硬くなり、耐摩耗性
が向上され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 14 had significantly less wear than the conventional brush contacts, and that the contact resistance was 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 14, has a dispersion of In and at least one kind of intermetallic compound of Te, Ti, Li, and Mg. This is because it becomes hard and has improved wear 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 a lower and more stable contact resistance than when using conventional brush contact materials.

Claims

[Claims]

1 Composition ratio: Au70.5-72.5% by weight, Pt7.5-9.5% by weight, Ag3.5-5.5% by weight, Cu13.5-15.5% by weight,
Au-Pt-Ag-Cu-Zn with Zn0.5-1.5 wt% 92~
98.5% by weight and the balance is In1.0~5.0% by weight, Te,
At least one of Ti, Li and Mg in total of 0.5 to 3
% by weight of a sliding contact material for a brush.