JPH0250182B2

JPH0250182B2 -

Info

Publication number: JPH0250182B2
Application number: JP56211268A
Authority: JP
Inventors: Susumu Fujishima
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1981-12-25
Filing date: 1981-12-25
Publication date: 1990-11-01
Also published as: JPS58112286A

Description

[Detailed description of the invention]

本発明は、小型モータの整流子外周に摺接する
刷子接点の刷子板材を作る刷子用摺動接点材料
（以下「摺動接点材料」という。）の改良に関す
る。従来より小型モータの整流子外周に摺接する刷
子接点の刷子板材を作るには、主として硬さ、ば
ね特性の優れた洋白（Cu54〜58重量％、Ni16.5
〜19.5重量％、Zn22.5〜29.5重量％）が用いられ
てきたが洋白では摺動時の機械的、電気的腐食に
より酸化物が発生する為耐消耗性に劣り、消耗粉
が生じ易く、消耗粉が生じるとノイズが発生する
という欠点があつた。本発明は、かかる欠点を解消すべくなされたも
ので、耐消耗性に優れた洋白系の摺動接点材料を
提供せんとするものである。本発明の摺動接点材料は、Ni14.9〜19.4重量
％、Zn20.2〜29.4重量％、Te、Mo、Pb及びSeの
少なくとも一種を合計で0.5〜10重量％及び残部
CuのCu合金から成るものである。かかる本発明の摺動接点材料に於いてNi14.9〜
19.4重量％、Zn20.2〜29.4重量％、Te、Mo、Pb
及びSeの少なくとも一種を合計で0.5〜10重量％
及び残部CuのCu合金とするのは、刷子接点の摺
動時に発生するTe、Mo、Pb及びSeの少なくと
も一種の酸化物が潤滑剤となり、前記従来の洋白
の耐消耗性が向上するからであり、また発生した
Te、Mo、Pb及びSeの酸化物は軟らかい為、摺
動作用により容易に除去されて接触抵抗が高く不
安定になることがないからであり、Te、Mo、
Pb及びSeの少なくとも一種を合計で0.5重量％未
満では潤滑剤としての効果が発揮できず、Te、
Mo、Pb及びSeの少なくとも一種を合計で10重量
％を超えると、酸化物の発生が多くなり、接触抵
抗が高く不安定となるものである。また、Ni、Zn、Cu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。次に本発明による摺動接点材料と従来の摺動接
点材料にて作つた刷子接点の刷子板材について説
明する。従来の合金材料を基材とし、これにTeを添加
し、後記の表の実施例１に示す成分組成の摺動接
点材料とし、以下同様にして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摺動接点材料
と従来例の摺動接点材料にて作つた幅0.5mm、厚
さ0.15mmの刷子板材を長さ10mmに切断の上図示の
如くこの刷子板材２を１枚保持して成る刷子接点
３の刷子板材２を、外周に厚さ0.2mmのAg−Cu10
重量％より成る接点片１ａを３枚有する直径10
mm、長さ６mmの小型モータの整流子１の外周に上
下相対向するように摺接させて後記の試験条件に
て整流子の回転試験を行い、刷子接点３の刷子板
材２の消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。試験条件電圧：24V 電流：直流250ｍＡ整流子の回転数：2000回転／分整流子の回転時間：300時間刷子接点の接触力：10ｇ The present invention relates to improvements in a brush sliding contact material (hereinafter referred to as "sliding contact material") for making a brush plate material for a brush contact that slides on the outer periphery of a commutator of a small motor. Traditionally, nickel silver (54-58% by weight Cu, 16.5% Ni), which has excellent hardness and spring characteristics, has been used to make the brush plate material for the brush contacts that slide on the outer circumference of the commutator of small motors.
~19.5% by weight, Zn22.5~29.5% by weight) has been used, but nickel silver produces oxides due to mechanical and electrical corrosion during sliding, so it has poor wear resistance and tends to produce consumable powder. However, there was a drawback that noise was generated when consumable powder was generated. The present invention has been made in order to eliminate such drawbacks, and aims to provide a nickel silver-based sliding contact material that has excellent wear resistance. The sliding contact material of the present invention contains 14.9 to 19.4% by weight of Ni, 20.2 to 29.4% by weight of Zn, a total of 0.5 to 10% by weight of at least one of Te, Mo, Pb, and Se, and the balance.
It is made of Cu alloy. In such a sliding contact material of the present invention, Ni14.9~
19.4 wt%, Zn20.2~29.4 wt%, Te, Mo, Pb
and at least one type of Se in a total of 0.5 to 10% by weight
The reason why a Cu alloy is used is that the oxide of at least one of Te, Mo, Pb, and Se generated when the brush contact slides acts as a lubricant, improving the abrasion resistance of the conventional nickel silver. and also occurred
This is because the oxides of Te, Mo, Pb, and Se are soft and are easily removed by sliding action, resulting in high contact resistance and no instability.
If the total content of at least one of Pb and Se is less than 0.5% by weight, the lubricant cannot be effective, and Te,
If the total amount of at least one of Mo, Pb and Se exceeds 10% by weight, oxides will be generated in large quantities, resulting in high contact resistance and instability. Furthermore, by setting the content of Ni, Zn, and Cu 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. be. Next, brush plate materials of brush contacts made of the sliding contact material according to the present invention and the conventional sliding contact material will be explained. A conventional alloy material is used as a base material, and Te is added to it to make a sliding contact material having the composition shown in Example 1 in the table below, and in the same manner, a book with the composition shown in the left column of the table below is made. A brush plate material 2 having a width of 0.5 mm and a thickness of 0.15 mm made from a sliding contact material according to an embodiment of the invention and a conventional sliding contact material is cut into a length of 10 mm as shown in the above figure. The brush plate material 2 of the brush contact 3 is made of Ag-Cu10 with a thickness of 0.2 mm on the outer periphery.
Diameter 10 with three contact pieces 1a made of 10% by weight
A rotation test of the commutator was carried out under the test conditions described below by sliding it in sliding contact with the outer periphery of the commutator 1 of a small motor with a length of 6 mm, vertically facing each other, and the amount of wear of the brush plate material 2 of the brush contact 3 When the contact resistance was measured, the results shown in the right column of the table below were obtained. Test conditions Voltage: 24V Current: DC 250mA Commutator rotation speed: 2000 revolutions/min Commutator rotation time: 300 hours Brush contact force: 10g

【表】前記の表で明らかなように従来例の刷子接点の
刷子板材の消耗量は60〜70μｍであつたのに対
し、実施例の刷子接点の刷子板材の消耗量は20〜
30μｍで著しく減少していて耐消耗性に優れてい
ることが判る。また従来例の刷子板材では、接触
抵抗が１〜6Ωであつたのに対し、実施例の刷子
板材では接触抵抗が0.6〜0.85Ωで著しく低く安定
していることが判る。これはひとえに実施例の刷
子板材が、摺動時に発生するTe、Mo、Pb、Se
の酸化物の潤滑剤により耐消耗性が向上し、また
この軟らかい酸化物が摺動作用により容易に除去
されて刷子板材の接触抵抗が低く安定するからに
他ならない。以上詳記した通り本発明の摺動接点材料は、摺
動時に発生するTe、Mo、Pb、Seの酸化物が潤
滑剤となり、またこの酸化物は摺動作用により容
易に除去されるので、これにより作つた刷子接点
の刷子板材は耐消耗性が著しく向上し、消耗粉の
発生が大幅に減少し、ノイズの発生が激減し、ま
た接触抵抗が低く安定する。従つて相手方の小型
モータの整流子の回転数のばらつきも少なくなる
等の優れた効果がある。[Table] As is clear from the above table, the amount of wear of the brush plate material of the brush contact of the conventional example was 60 to 70 μm, whereas the amount of wear of the brush plate material of the brush contact of the example was 20 to 70 μm.
It can be seen that the thickness decreases significantly at 30 μm, indicating excellent wear resistance. Further, it can be seen that the contact resistance of the brush plate material of the conventional example was 1 to 6 Ω, whereas the contact resistance of the brush plate material of the example was 0.6 to 0.85 Ω, which was extremely low and stable. This is simply due to the fact that the brush plate material of the example has Te, Mo, Pb, and Se generated during sliding.
This is because the wear resistance is improved by the oxide lubricant, and the soft oxide is easily removed by the sliding action, making the contact resistance of the brush plate material low and stable. As detailed above, in the sliding contact material of the present invention, the oxides of Te, Mo, Pb, and Se generated during sliding act as lubricants, and these oxides are easily removed by the sliding action. The brush plate material of the brush contact made by this method has significantly improved wear resistance, the generation of wasted powder is greatly reduced, the generation of noise is drastically reduced, and the contact resistance is low and stable. Therefore, there are excellent effects such as less variation in the rotational speed of the commutator of the other small motor.

[Brief explanation of the drawing]

図は小型モータの整流子と刷子接点の接触状態
を示す斜視図である。１……整流子、１ａ……接点片、２……刷子板
材、３……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. 1...Commutator, 1a...Contact piece, 2...Brush plate material, 3...Brush contact.

Claims

[Claims]

1 Ni14.9-19.4% by weight, Zn20.2-29.4% by weight,
At least one of Te, Mo, Pb and Se in total
A sliding contact material for a brush, characterized in that it is a Cu alloy containing 0.5 to 10% by weight and the balance being Cu.