JPH0252687B2

JPH0252687B2 -

Info

Publication number: JPH0252687B2
Application number: JP57208261A
Authority: JP
Inventors: Fujimatsu Takiguchi
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1982-11-27
Filing date: 1982-11-27
Publication date: 1990-11-14
Also published as: JPS59100237A

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、硬
さ、耐蝕性、ばね性等の優れた、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。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
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93〜99.5重量％及び残部がGa
及びMnの少なくとも一種を合計で0.5〜７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93〜99.5重量％及び残部が
Ga及びMnの少なくとも一種を合計で0.5〜７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酸化物を適量発生さ
せる為で、Ga及びMn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、Ga及びMn
のうち少なくとも一種を合計で７重量％を超える
と酸化物の発生量が多くなり、接触抵抗が高く不
安定となり、その上ばね性が劣化するものであ
る。次に従来の合金材料を基材とし、これにGa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, materials with excellent hardness, corrosion resistance, spring properties, etc., such as Au69-71% by weight, Pt4-6% by weight, Ag9 ~11 wt%, Cu13~15
% by weight, alloy materials consisting of 0.5-1.5% by weight Ni were widely used. 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
Au69~71wt%, Pt4~6wt%, Ag9~11wt%, Cu13~15wt%, Ni0.5~1.5wt% Au—
Pt-Ag-Cu-Ni is 93-99.5% by weight and the balance is Ga
and at least one type of Mn in a total of 0.5 to 7% by weight
It consists of 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 93-99.5% by weight and the balance is
The reason why at least one of Ga and Mn is set at 0.5 to 7% by weight in total is to generate an appropriate amount of lubricant and oxide to improve the wear resistance of the conventional alloy material. If the total amount of one type is less than 0.5% by weight, the amount of oxide generated is small and the lubricant cannot be effective, and Ga and Mn
If the total amount of at least one of these exceeds 7% by weight, the amount of oxides generated will increase, the contact resistance will be high and unstable, and the spring properties will deteriorate. Next, a conventional alloy material is used as a base material, and Ga is added thereto to obtain a brush sliding contact material having the composition shown in Example 1 in the table. Brush wires with a wire diameter of 0.7 mm were made using the sliding contact material and the conventional sliding contact material for brushes, each 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 13 mm. A brush contact was made by welding to a 0.2 mm thick base material and bending 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１〜11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１〜11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Ga、Mn等の酸化物を発生し、この
酸化物が潤滑剤となり、耐摩耗性、接触抵抗特性
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 11 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 11, generates oxides such as Ga and Mn during sliding, and these oxides act as lubricants. This is because the wear resistance and contact resistance characteristics are 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,
93-99.5 wt% Au-Pt-Ag-Cu-Ni with 9-11 wt% Ag, 13-15 wt% Cu, 0.5-1.5 wt% Ni
and the remainder is a total of at least one of Ga and Mn.
A sliding contact material for a brush, characterized in that the content is 0.5 to 7% by weight.