JPH0259232B2

JPH0259232B2 -

Info

Publication number: JPH0259232B2
Application number: JP57230653A
Authority: JP
Inventors: Susumu Fujishima
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1982-12-25
Filing date: 1982-12-25
Publication date: 1990-12-11
Also published as: JPS59118835A

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、
Au19.0〜21.0重量％、Pt4.0〜6.0重量％、Pd44.0
〜46.0重量％、Ag29.0〜31.0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、その点に着目
されて、Au，Pt，Pd，Ag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着し
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、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
Au19.0〜21.0重量％、Pt4.0〜6.0重量％、Pd44.0
〜46.0重量％、Ag29.0〜31.0重量％のAu−Pt−
Pd−Agが95〜99.5重量％及び残部がCo及びTiの
少なくとも一種を合計で0.5〜5.0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Au19.0〜21.0重量％、Pt4.0〜60重量％、
Pd44.0〜46.0重量％、Ag29.0〜31.0重量％のAu
−Pt−Pd−Agが95〜99.5重量％及び残部がCo及
びTiの少なくとも一種を合計で0.5〜5.0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及びTi
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、Co及びTiの少なくと
も一種を合計で5.0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
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, as sliding contact materials for brushes,
Au19.0~21.0wt%, Pt4.0~6.0wt%, Pd44.0
-46.0% by weight, Ag29.0-31.0% by weight were widely used (New Contact Materials edited by Japan Electronic Materials Technology Association, published by Kogyo Nichi-Nichi Shimbun on July 8, 1966) (See page 30). This alloy material has particularly excellent properties such as mechanical strength, corrosion resistance, and spring properties, and with this in mind, it is made with limited elements and contents such as Au, Pt, Pd, and Ag. It is. However, brush contacts made of this alloy material have a low softening temperature and tend to adhere when sliding with the commutator, resulting in poor wear resistance, easy generation of wear particles, unstable contact resistance, and noise generation. It was the cause of The present invention has been made in order to eliminate such drawbacks, and provides a brush for use in which the above-mentioned alloy material is used as a base material and a specific material is slightly added thereto to raise the softening temperature and improve the abrasion resistance. The present invention aims to provide a sliding contact material. The sliding contact material for brushes of the present invention has a composition ratio of
Au19.0~21.0wt%, Pt4.0~6.0wt%, Pd44.0
~46.0 wt%, Ag29.0~31.0 wt% Au−Pt−
The composition consists of 95 to 99.5% by weight of Pd-Ag and the balance of at least one of Co and Ti in a total of 0.5 to 5.0% by weight. In the sliding contact material for brushes of the present invention, the composition ratio is 19.0 to 21.0% by weight of Au, 4.0 to 60% by weight of Pt,
Pd44.0~46.0wt%, Ag29.0~31.0wt%Au
The reason why -Pt-Pd-Ag is 95 to 99.5% by weight and the balance is at least one of Co and Ti is 0.5 to 5.0% by weight in total is that the softening temperature of the conventional alloy material is raised to improve adhesion resistance. Co and Ti
If the total amount of at least one of Co 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 and Ti exceeds 5.0% by weight, the amount of oxides generated increases, the contact resistance increases, and the This will result in instability. Also, Au, Pt, Pd, Ag
By setting the content 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 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１〜９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、接触抵抗が同時に低く安定していることが
判る。これはひとえに実施例１〜９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，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と同等の接触抵抗
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 9 have significantly less wear than the conventional brush contacts, and the contact resistance is also low and stable. This is simply because the sliding contact material for brushes of the present invention, which constitutes the brush wire of the brush contacts of Examples 1 to 9, is prevented from softening during sliding by Co and Ti, and the adhesion resistance is improved. It is only because it is done. 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 contact resistance equivalent to that of a conventional brush contact material.

Claims

[Claims]

1 Composition ratio: Au19.0-21.0% by weight, Pt4.0-6.0% by weight, Pd44.0-46.0% by weight, Ag29.0-31.0% by weight
Au-Pt-Pd-Ag is 95-99.5% by weight and the balance is
A sliding contact material for a brush, characterized in that the total content of at least one of Co and Ti is 0.5 to 5.0% by weight.