JPH0252701B2

JPH0252701B2 -

Info

Publication number: JPH0252701B2
Application number: JP58023920A
Authority: JP
Inventors: Susumu Fujishima
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1983-02-16
Filing date: 1983-02-16
Publication date: 1990-11-14
Also published as: JPS59150036A

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、
Au69〜71重量％、Pt4〜６重量％、Ag9〜11重量
％、Cu13〜15重量％、Ni0.5〜1.5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、Pt、Cuによるばね性、Cu、
Ni、Pt、Auなどによる機械的強度、その他、鋳
造性、加工性の点に着目されて、Au、Pt、Ag、
Cu、Ni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、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
Au69〜71重量％、Pt4〜６重量％、Ag9〜11重量
％、Cu13〜15重量％、Ni0.5〜1.5重量％のAu―
Pt―Ag―Cu―Niが92〜98.5重量％及び残部が
Sb1.0〜5.0重量％、In、Ti、Tl及びZrの少なくと
も一種を合計で0.5〜3.0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Au69〜71重量％、Pt4〜６重量％、Ag9〜11重
量％、Cu13〜15重量％、Ni0.5〜1.5重量％のAu
―Pt―Ag―Cu―Niが92〜98.5重量％及び残部が
Sb1.0〜5.0重量％、In、Ti、Tl及びZrの少なくと
も一種を合計で0.5〜3.0重量％としている理由
は、前記従来の合金材料の耐摩耗性を向上すべく
SbとIn、Ti、Tl、Zrとの金属間化合物を分散し
て硬くする為で、Sbが１重量％未満あるいは、
In、Ti、Tl及びZr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、Sb
が５重量％を超えるかあるいはIn、Ti、Tl及び
Zr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、Ni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Sbと
In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,
An alloy material consisting of 69-71% by weight of Au, 4-6% by weight of Pt, 9-11% by weight of Ag, 13-15% by weight of Cu, and 0.5-1.5% by weight of Ni was widely used (July 8, 1966).
(See page 30 of New Contact Materials, edited by Japan Electronic Materials Technology Association, published by Kogyo Nichi Nichi Shimbun, Inc.). 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, Pt, and Cu. Spring properties due to Cu,
Focusing on the mechanical strength, castability, and processability of Ni, Pt, and Au, Au, Pt, Ag,
It is made by limiting elements such as Cu and Ni and their content. 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
Au69~71wt%, Pt4~6wt%, Ag9~11wt%, Cu13~15wt%, Ni0.5~1.5wt% Au—
Pt-Ag-Cu-Ni is 92-98.5% by weight and the balance is
The composition contains 1.0 to 5.0% by weight of Sb and a total of 0.5 to 3.0% by weight of at least one of In, Ti, Tl, and Zr. In the sliding contact material for brushes of the present invention, the composition ratio of Au is 69 to 71% by weight, Pt is 4 to 6% by weight, Ag is 9 to 11% by weight, Cu is 13 to 15% by weight, and Ni is 0.5 to 1.5% by weight.
-Pt-Ag-Cu-Ni is 92 to 98.5% by weight and the balance is
The reason why Sb is 1.0 to 5.0% by weight and at least one of In, Ti, Tl, and Zr is 0.5 to 3.0% by weight in total is to improve the wear resistance of the conventional alloy material.
This is to disperse and harden intermetallic compounds of Sb and In, Ti, Tl, and Zr, and Sb is less than 1% by weight or
If the total amount of at least one of In, Ti, Tl, and Zr is less than 0.5% by weight, the effect cannot be exhibited, and Sb
exceeds 5% by weight or In, Ti, Tl and
If the total amount of at least one type of Zr exceeds 3% by weight, the amount of oxides generated will increase, contact resistance will increase, and furthermore, it will become unstable. Also,
By setting the content of Au, Pt, Ag, Cu, and Ni 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. It is something. Next, a conventional alloy material is used as a base material, and Sb and Sb are added to this.
By adding In, a brush sliding contact material having the composition shown in Example 1 of the table was prepared, and the same was applied to the brush sliding contact material of the present invention having the composition shown in the table and the conventional brush sliding contact material. Brush wire rods with a wire diameter of 0.7 mm were made using the materials, and each was cut into lengths of 8 mm.
Two pieces are placed in parallel and one end is 10mm wide, 13mm long, and thick.
A brush contact was made by welding to a 0.2 mm base material and curving a 2R arc-shaped contact part at 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: 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、SbとIn、Ti、Tl、Zrと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 brush sliding contact material 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 of Sb, In, Ti, Tl, and Zr. 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 Composition ratio: Au69-71% by weight, Pt4-6% by weight,
92-98.5 wt% Au-Pt-Ag-Cu-Ni with 9-11 wt% Ag, 13-15 wt% Cu, 0.5-1.5 wt% Ni
and the balance is Sb1.0-5.0% by weight, In, Ti, Tl and Zr
A sliding contact material for a brush, comprising a total of 0.5 to 3.0% by weight of at least one of the above.