JPH0329847B2

JPH0329847B2 -

Info

Publication number: JPH0329847B2
Application number: JP58102090A
Authority: JP
Priority date: 1983-06-08
Filing date: 1983-06-08
Publication date: 1991-04-25
Also published as: JPS59229440A

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、
Pt0.1〜１重量％、Pd42〜44重量％、Ag39〜41重
量％、Cu15.5〜17.5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、各元素の複合添加による相乗
効果と相俟つて、特に耐蝕性、ばね性、機械的強
度、加工性の点に着目されて、Pt、Pd、Ag、Cu
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、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、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
Pt0.1〜１重量％、Pd42〜44重量％、Ag39〜41重
量％、Cu15.5〜17.5重量％のPt−Pd−Ag−Cu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Pt0.1〜１重量％、Pd42〜44重量％、Ag39〜41
重量％、Cu15.5〜17.5重量％のPt−Pd−Ag−Cu
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、Li、Tl、
Mgの金属間化合物を分散することによつて硬く
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5.0
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、Pt、
Pd、Ag、Cu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及び
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,
Alloy materials consisting of 0.1 to 1% by weight of Pt, 42 to 44% by weight of Pd, 39 to 41% by weight of Ag, and 15.5 to 17.5% by weight of Cu were widely used (Kogyo Nichi Nichi Shimbun on July 8, 1966). (See page 30 of New Contact Materials edited by the Japan Electronic Materials Technology Association, published by the Japan Electronic Materials Technology Association). This alloy material has been developed by combining Pt, Pd, Ag, and Cu, with particular attention paid to its corrosion resistance, spring properties, mechanical strength, and workability, as well as the synergistic effects of the combined addition of each element.
The elements and content are limited. However, brush contacts made of this alloy material have poor abrasion resistance when sliding with the commutator, tend to generate abrasion powder, and have unstable contact resistance, causing noise generation. 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
Pt-Pd-Ag-Cu with Pt0.1~1wt%, Pd42~44wt%, Ag39~41wt%, Cu15.5~17.5wt%
92-98.5% by weight and the balance is In 1.0-5.0% by weight,
At least one of Te, Ti, Li and Mg in total
It consists of 0.5 to 3% by weight. In the sliding contact material for brushes of the present invention, the composition ratio is 0.1 to 1% by weight of Pt, 42 to 44% by weight of Pd, and 39 to 41% of Ag.
wt%, Cu15.5-17.5 wt% Pt−Pd−Ag−Cu
is 92-98.5% by weight and the balance is In 1.0-5.0% by weight,
At least one of Te, Ti, Li and Mg in total
The reason why the content is 0.5 to 3% by weight is that In, Te, Li, Tl,
This is to make it hard by dispersing an intermetallic compound of Mg, and if the In content is less than 1.0% by weight or Te,
A total of 0.5 of at least one of Ti, Li and Mg
If the weight is less than 5.0%, the effect cannot be achieved, and In is less than 5.0%.
wt% or more than Te, Ti, Li and Mg
If the total amount of at least one of these exceeds 3% by weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become unstable. Also, Pt,
By setting the contents of Pd, Ag, and Cu within a range that does not change the composition ratio of the conventional alloy material,
The properties of conventional alloy materials will be exhibited without being impaired. Next, a conventional alloy material is used as a base material, and In and
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 to 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、Li、Mgの少なくとも一種によつて
金属間化合物が分散し硬くなり、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 simply due to the fact that the sliding contact material for brushes of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 14, is hard due to the dispersion of intermetallic compounds by In and at least one of Te, Li, and Mg. This is because the wear resistance is improved. 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 Pt with composition ratio of 0.1 to 1% by weight, Pd 42 to 44% by weight, Ag 39 to 41% by weight, Cu 15.5 to 17.5% by weight
-Pd-Ag-Cu is 92-98.5% by weight and the balance is In1.0
5.0% by weight, and at least one of Te, Ti, Li, and Mg in a total amount of 0.5 to 3% by weight.