JPH0254410B2

JPH0254410B2 -

Info

Publication number: JPH0254410B2
Application number: JP56211278A
Authority: JP
Inventors: Takaaki Sagawa
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1981-12-25
Filing date: 1981-12-25
Publication date: 1990-11-21
Also published as: JPS58110646A

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摺動接点材料としては、
硬さ、ばね特性などの優れたTi2.4〜3.4重量％、
残部Cuより成るTi−Cuが用いられてきたが、Ti
−Cuでは耐摩耗性が劣り、摩耗粉が生じ易く、
摩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、耐摩耗性を向上させ且つ接触抵抗を低く安
定されたTi−Cu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、Ti2.3〜3.4重量％、
Nb、In及びBaの少なくとも一種を合計で0.5〜５
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、Ti2.3
〜3.4重量％、Nb、In及びBaの少なくとも一種を
合計で0.5〜５重量％残部CuのCu合金とするの
は、Nb、In、Baの元素が潤滑剤となり、耐摩耗
性が向上するからであり、またこれら潤滑剤の摩
耗粉が軟らかくて摺動作用により容易に除去でき
て接触抵抗が低く安定するからで、Nb、In、Ba
の少なくとも一種を合計で0.5重量％未満ではそ
の効果が無く、Nb、In、Baの少なくとも一種を
合計で５重量％を超えると、酸化物の発生量が多
くなり、接触抵抗が高く不安定となるものであ
る。なお、Ti、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Nb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巾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10mm、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. Conventionally, the sliding contact materials used to make brush plate materials for brush contacts that slide into contact with the outer periphery of the commutator of small motors include:
Ti2.4~3.4% by weight, with excellent hardness and spring properties, etc.
Ti-Cu with the remainder being Cu has been used, but Ti
-Cu has poor wear resistance and easily generates wear particles.
The drawback was that noise was generated when wear debris was generated. The present invention has been made to eliminate these drawbacks, and aims to provide a Ti--Cu based sliding contact material that has improved wear resistance and low and stable contact resistance. The sliding contact material of the present invention contains Ti2.3 to 3.4% by weight,
At least one of Nb, In and Ba in total of 0.5 to 5
% by weight and the balance is Cu alloy. In the sliding contact material of the present invention, Ti2.3
~3.4% by weight, at least one of Nb, In, and Ba in total and 0.5 to 5% by weight balance Cu alloy because the elements of Nb, In, and Ba act as lubricants and improve wear resistance. This is also because the wear particles of these lubricants are soft and can be easily removed by sliding action, resulting in low and stable contact resistance.
If the total amount of at least one of Nb, In, and Ba is less than 0.5% by weight, there is no effect, and if the total amount of at least one of Nb, In, and Ba exceeds 5% by weight, the amount of oxides generated increases, resulting in high contact resistance and instability. It is what it is. Note that by setting the content of Ti 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. 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 Nb 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 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 was cut into a length of 10 mm, and the brush plate material 2 was cut as shown in the figure. The brush plate material 2 of the brush contact 3 held in one piece is coated with a 0.2 mm thick Ag-
Commutator rotation test using three contact pieces 1a made of 10% Cu by sliding contact with the outer circumference of the commutator 1 of a small motor with a diameter of 10 mm and a length of 6 mm so as to face each other vertically under the test conditions described below. The amount of wear and contact resistance of the brush plate material 2 of the brush contact point 3 was measured, and 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
刷子板材の摩耗量は40〜60μmであつたのに対し、
実施例の刷子接点の刷子板材の摩耗量は20〜
30μmで著しく減少していて耐摩耗性に優れてい
ることが判る。また従来例の刷子板材では接触抵
抗が１〜５Ωであつたのに対し、実施例の刷子板
材では接触抵抗が0.6〜0.75Ωで低く安定してい
ることが判る。これはひとえに実施例の刷子板材
が摺動中含有されたNb、In、Baが潤滑剤となつ
て耐摩耗性が向上し、潤滑剤の軟らかい摩耗粉が
摺動作用により容易に除去されるからに他ならな
い。以上詳記した通り本発明の摺動接点材料は、
Ti−CuにNb、In、Baが含有されてこれら元素
が摺動中潤滑剤となり、またこの潤滑剤は摺動作
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摩耗性が向上してノイ
ズが発生することが無く、しかも摺動中の接触抵
抗が低く安定するという優れた効果がある。[Table] As is clear from the table above, the amount of wear of the brush plate material of the conventional brush contact was 40 to 60 μm, whereas
The wear amount of the brush plate material of the brush contact in the example is 20~
It can be seen that the wear resistance is significantly reduced at 30μm, 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 5 Ω, whereas the contact resistance of the brush plate material of the example was low and stable at 0.6 to 0.75 Ω. This is because the Nb, In, and Ba contained in the brush plate material of the example act as a lubricant during sliding, improving wear resistance, and the soft wear particles of the lubricant are easily removed by the sliding action. Nothing but. As detailed above, the sliding contact material of the present invention is
Ti-Cu contains Nb, In, and Ba, and these elements act as lubricants during sliding, and this lubricant is easily removed during sliding, so the brush plate material of brush contacts made with these elements has a high resistance to wear. It has the excellent effect of improved abrasion resistance, no noise generation, and low and stable contact resistance during sliding.

[Brief explanation of the drawing]

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。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 2.3 to 3.4% by weight of Ti, a total of 0.5 to 5% by weight of at least one of Nb, In, and Ba, and the balance Cu
A sliding contact material for brushes characterized by being an alloy.