JPH0260729B2

JPH0260729B2 -

Info

Publication number: JPH0260729B2
Application number: JP57181165A
Authority: JP
Inventors: Fujimatsu Takiguchi
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1982-10-15
Filing date: 1982-10-15
Publication date: 1990-12-18
Also published as: JPS5970737A

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、Au9
〜11重量％、Pt9〜11重量％、Pd34〜36重量％、
Ag29〜31重量％、Cu13〜15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
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、Pd、Cuによるばね性、Cu、
Pt、Auなどによる機械的強度、Znの鋳造法、加
工性の点に着目されて、Au、Pt、Pd、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
は軟化温度が低く、整流子との摺動時に凝集しや
すいため、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軟化温度を高め、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Au9
〜11重量％、Pt9〜11重量％、Pd34〜36重量％、
Ag29〜31重量％、Cu13〜15重量％、Zn0.5〜1.5
重量％のAu−Pt−Pd−Ag−Cu−Znが95〜99.5
重量％及び残部がCo、Sn及びTiの少なくとも一
種を合計で0.5〜５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Au9〜11重量％、Pt9〜11重量％、Pd34〜36重
量％、Ag29〜31重量％、Cu13〜15重量％、
Zn0.5〜1.5重量％のAu−Pt−Pd−Ag−Cu−Zn
が95〜99.5重量％及び残部がCo、Sn及びTiの少
なくとも一種を合計で0.5〜５重量％としている
理由は、前記従来の合金材料の軟化温度を高めて
耐凝着性を向上させる為で、Co、Sn及びTiのう
ち少なくとも一種で0.5重量％未満ではその効果
を発揮できず、Co、Sn及びTiのうち少なくとも
一種を合計で５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、
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Co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, Au9 is used as sliding contact material for brushes.
~11 wt%, Pt9~11 wt%, Pd34~36 wt%,
Ag29~31wt%, Cu13~15wt%, Zn0.5~1.5
Alloy materials consisting of
(See page 30). 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, Pd, and Cu. Spring properties due to Cu,
Focusing on the mechanical strength of Pt, Au, etc., the casting method of Zn, and the workability, Au, Pt, Pd, Ag, Cu,
It is made by limiting elements such as Zn and their content. However, brush contacts made of this alloy material have a low softening temperature and tend to aggregate when sliding with the commutator, resulting in poor wear resistance and easy formation of wear particles.
The contact resistance was unstable and caused noise. The present invention was made to eliminate such drawbacks, and uses the alloy material as a base material and slightly adds a specific material to increase the softening temperature, and uses the generated oxide as a lubricant to improve resistance. It is an object of the present invention to provide a sliding contact material for brushes with improved abrasion resistance. The sliding contact material for brushes of the present invention has a composition ratio of Au9
~11 wt%, Pt9~11 wt%, Pd34~36 wt%,
Ag29~31wt%, Cu13~15wt%, Zn0.5~1.5
Weight% Au-Pt-Pd-Ag-Cu-Zn is 95~99.5
The balance consists of a total of 0.5 to 5% by weight of at least one of Co, Sn, and Ti. In the sliding contact material for brushes of the present invention, the composition ratio is 9 to 11% by weight of Au, 9 to 11% by weight of Pt, 34 to 36% by weight of Pd, 29 to 31% by weight of Ag, 13 to 15% by weight of Cu,
Au-Pt-Pd-Ag-Cu-Zn with Zn0.5~1.5 wt%
The reason why the content is 95 to 99.5% by weight and the balance is 0.5 to 5% by weight in total of at least one of Co, Sn, and Ti is to increase the softening temperature of the conventional alloy material and improve the adhesion resistance. If at least one of Co, Sn, and Ti is less than 0.5% by weight, the effect cannot be exhibited, and if the total amount of at least one of Co, Sn, and Ti exceeds 5% by weight, the amount of oxides generated increases. The contact resistance becomes high, and furthermore, it becomes unstable. Also, Au, Pt, Pd, Ag,
By setting the contents of 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. Next, a conventional alloy material is used as a base material, and Co is added thereto to obtain a brush sliding contact material having the composition shown in Example 1 of the table. Brush wires with a wire diameter of 0.7 mm were made using sliding contact materials for commercial use and conventional sliding contact materials for brushes, each cut into 8 mm lengths, 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、摺動時の軟化をCo、Sn、Tiによつて防止さ
れ、耐凝着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 table above, it can be seen that the brush contacts of Examples 1 to 15 had significantly less wear than the conventional brush contacts, and 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 15, is prevented from softening during sliding by Co, Sn, and Ti, and is resistant to adhesion. This is because it improves sexuality. 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 sliding contact materials.

Claims

[Claims]

1 Composition ratio of Au9 to 11% by weight, Pt9 to 11% by weight,
Au-Pt-Pd-Ag-Cu with Pd34-36 wt%, Ag29-31 wt%, Cu13-15 wt%, Zn0.5-1.5 wt%
−95-99.5% by weight of Zn and the balance being Co, Sn and Ti
A sliding contact material for a brush, characterized in that the total amount of at least one of the following is 0.5 to 5% by weight.