JPS61130444A - Sliding contact point material - Google Patents

Abstract

PURPOSE:To control the adhesive property and to improve the wear resistance by adding prescribed percenrtages of C, In, Sn and Fe group element to Ag. CONSTITUTION:A sliding contact point material is obtd. by adding 0.1-5wt% C and 0.5-10wt% in total of In and Sn to Ag. An Fe group element may be substituted for part (0.01-0.5wt%) of said added elements. The adhesion of the contact material during sliding action is suppressed, and wear resistance is improved.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、すり接点材料の改良に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in sliding contact materials.

（従来技術と問題点） 従来よりすり接点材料の一つとしてＡｇ−Ｃｄ合金が用
いられてきたが、Ａｇ−Ｃｄ合金はすり動作時に凝着し
耐摩耗性が十分でなく、このＡｇ−Ｃｄ合金で小型モー
タの整流子の外周の接点片を製作して使用した場合には
刷子接点とのすり動作により摩耗粉が生じ、ノイズ発生
の原因となっていた。(Prior art and problems) Ag-Cd alloy has conventionally been used as one of the sliding contact materials, but Ag-Cd alloy adheres during sliding operation and does not have sufficient wear resistance. When a contact piece for the outer periphery of a commutator of a small motor is made of alloy and used, abrasion powder is generated due to the sliding action with the brush contact, which causes noise generation.

（発明の目的） 本発明は、斯かる欠点を解消すべくなされたものであり
、Ａｇ−Ｃｄ合金の凝着性を抑え耐摩耗性を向上させる
と共に接触抵抗を低く安定させたすり接点材料を提供せ
んとするものである。(Object of the Invention) The present invention has been made to eliminate such drawbacks, and provides a sliding contact material that suppresses the adhesion of Ag-Cd alloy, improves wear resistance, and has low and stable contact resistance. This is what we intend to provide.

（発明の構成） 本発明のすり接点材料は、Ａｇ中に、Ｃを０．１〜５重
量％とＩｎ及びＳｎを合計で０．５〜１０重量％添加し
て成るものである。(Structure of the Invention) The sliding contact material of the present invention is made by adding 0.1 to 5% by weight of C and 0.5 to 10% by weight of In and Sn in total to Ag.

また本発明のすり接点材料の添加元素の一部をｏ、ｏｔ
〜ｏ、ｓ重量％の範囲でＦｅ族元素（Ｆ　ｅ、　Ｃｏ。In addition, some of the additive elements of the sliding contact material of the present invention are o, ot
Fe group elements (Fe, Co.

Ｎｉ）に置換しても良いものである。Ni) may be substituted.

かかる本発明のすり接点材料に於いて、Ａｇ中に０．１
〜５重量％のＣを添加するのは、Ａｇの耐摩耗性を向上
させる為で、０．１重量％未満ではその効果が現われず
、５重量％を超えると加工困難となるものである。また
Ｉｎ及びＳｎを合計で０．５〜１０重量％添加するのは
、すり動作中に発生する前記元素の酸化物が潤滑剤とし
て作用し耐摩耗性を向上させる為で、０．５重量％未満
ではその効果が現われず、１０重量％を超えると、酸化
物の発生量が多く接触抵抗が高く不安定になるものであ
る。In the sliding contact material of the present invention, 0.1
The reason for adding up to 5% by weight of C is to improve the wear resistance of Ag; if it is less than 0.1% by weight, the effect will not appear, and if it exceeds 5% by weight, it will be difficult to process. In addition, the reason why In and Sn are added in a total of 0.5 to 10% by weight is that the oxides of the above elements generated during the sliding action act as a lubricant and improve wear resistance. If it is less than 10% by weight, the effect will not be apparent, and if it exceeds 10% by weight, a large amount of oxides will be generated, resulting in high contact resistance and instability.

さらに添加元素の一部をｏ、ｏｉ〜０．５重量％の範囲
でＦｅ族元素（Ｆｅ、Ｃｏ、Ｎｉ）に置換した場合には
、結晶粒を微細化でき一段と耐摩耗性を向上できるもの
で、０．０１重量％未満では結晶粒を微細化できず、０
．５重量％を超えると合金せず、Ａｇ中に単体で大きな
塊りとして析出し、それ以上の効果の得られないもので
ある。Furthermore, when some of the added elements are replaced with Fe group elements (Fe, Co, Ni) in the range of o, oi to 0.5% by weight, the crystal grains can be made finer and wear resistance can be further improved. If it is less than 0.01% by weight, the crystal grains cannot be refined;
．． If it exceeds 5% by weight, it will not form an alloy and will precipitate as a single large lump in Ag, making it impossible to obtain any further effects.

（実施例及び従来例） 本発明によるすり接点材料と従来のすり接点材料にて作
った小型モータの整流子の接点片について説明する。(Embodiments and Conventional Examples) A contact piece for a commutator of a small motor made of a sliding contact material according to the present invention and a conventional sliding contact material will be described.

後記の表の左欄に示す成分組成の本発明の実施例である
すり接点材料と従来例のすり接点材料にて、図面に示す
如く小型モータの直径１２ｎ、長さ８ｆｌの整流子１の
外周に厚さ２龍の接点片１ａが形成され、この接点片１
ａの外周面の上下に、ＡｕＡ　ｇ　−Ｃｕ　−ｐ　ｔよ
り成る直径０．７ｍｍ、長さ８鶴の２本の刷子線材２を
有する刷子接点３を相対向するように接触させて、後記
の試験条件にて整流子１の回転試験を行い、接点片１ａ
の摩耗量と接触抵抗を測定した処、後記の表の右欄に示
すような結果を得た。Using the sliding contact material according to the embodiment of the present invention and the conventional sliding contact material having the composition shown in the left column of the table below, the outer periphery of a commutator 1 of a small motor with a diameter of 12n and a length of 8fl as shown in the drawings is used. A contact piece 1a having a thickness of 2 mm is formed on the contact piece 1.
Brush contacts 3 having two brush wires 2 made of AuA g -Cu -pt with a diameter of 0.7 mm and a length of 8 wires are brought into contact with the upper and lower sides of the outer peripheral surface of a so as to face each other, as described below. A rotation test was conducted on the commutator 1 under the test conditions, and the contact piece 1a
The wear amount and contact resistance were measured, and the results shown in the right column of the table below were obtained.

試験条件 電　　　　圧：ＤＣ１２Ｖ 電　　　　流：　　０．６Ａ 整流子の回転数：　１０００ｒ　ｐ　ｍ整流子の回転時
間ニア時間 刷子接点の接触カニ１００ｇ （以下余白） 前記の表で明らかなように従来例の接点片の摩耗量に比
べ、実施例の接点片の摩耗量は著しく減少していて耐摩
耗性に優れていることが判る。また従来例の接点片を有
する整流子の接触抵抗に対し、実施例の接点片を有する
整流子の接触抵抗は低く安定していることが判る。Test conditions Voltage: DC12V Current: 0.6A Commutator rotation speed: 1000rpm Commutator rotation time Near time Brush contact contact crab 100g (blank below) As is clear from the table above, the conventional contact It can be seen that the amount of wear on the contact piece of the example is significantly reduced compared to the amount of wear on the piece, indicating that it has excellent wear resistance. Furthermore, it can be seen that the contact resistance of the commutator having the contact pieces of the example is lower and more stable than the contact resistance of the commutator having the contact pieces of the conventional example.

（発明の効果） 以上詳記した通り本発明のすり接点材料は、凝着しにく
（耐摩耗性に優れているので、これにより作った小型モ
ータの整流子の接点片は刷子接点とのすり接待摩耗粉の
発生が極めて少なく、従ってノイズが発生することがな
く、接触抵抗が低く安定している等の優れた効果がある
。(Effects of the Invention) As detailed above, the sliding contact material of the present invention is resistant to adhesion (has excellent abrasion resistance), so the contact piece of the commutator of a small motor made using this material can be used to contact brush contacts. It has excellent effects such as very little generation of contact wear powder, therefore no noise, and low and stable contact resistance.

【図面の簡単な説明】[Brief explanation of drawings]

図は小型モータの整流子と刷子接点との接触状態を示す
斜視図である。 ■・−・−・・整流子、１ａ・・−−−一接点片、２−
・・−刷子線材、３・−ｍ−・刷子接点。The figure is a perspective view showing the state of contact between the commutator and brush contacts of a small motor. ■・--- Commutator, 1a---One contact piece, 2-
...-Brush wire, 3.-m-.Brush contact.

Claims (1)

【特許請求の範囲】 １）Ａｇ中に、Ｃを０．１〜５重量％とＩｎ及びＳｎを
合計で０．５〜１０重量％添加して成るすり接点材料。 ２）上記添加元素の一部が０．０１〜０．５重量％の範
囲でＦｅ族元素に置換されていることを特徴とする特許
請求の範囲第１項記載のすり接点材料。[Claims] 1) A sliding contact material made by adding 0.1 to 5% by weight of C and 0.5 to 10% by weight of In and Sn in total to Ag. 2) The sliding contact material according to claim 1, wherein a part of the additional element is substituted with an Fe group element in a range of 0.01 to 0.5% by weight.