JPS6245670B2 - - Google Patents
Info
- Publication number
- JPS6245670B2 JPS6245670B2 JP9941679A JP9941679A JPS6245670B2 JP S6245670 B2 JPS6245670 B2 JP S6245670B2 JP 9941679 A JP9941679 A JP 9941679A JP 9941679 A JP9941679 A JP 9941679A JP S6245670 B2 JPS6245670 B2 JP S6245670B2
- Authority
- JP
- Japan
- Prior art keywords
- brush
- metal
- powder
- conductor
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 239000004020 conductor Substances 0.000 claims description 24
- 239000011148 porous material Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 15
- 230000001050 lubricating effect Effects 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000006262 metallic foam Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 239000011135 tin Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、モータ用ブラシに関するものであ
る。詳しく述べると、新規なフラツトモータ用ブ
ラシに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a brush for a motor. More specifically, the present invention relates to a new brush for flat motors.
（従来の技術）
従来、フラツトモータ１は、第１図に示すよう
に、ハウジング２内に設けた永久磁石３と僅かな
間隙４をもつて対設され、かつ、このハウジング
２に回動自在に支持された扁平円盤状のアーマチ
ユア５と、該アーマチユア５の盤面５ａに、先端
平坦面６が弾性的に突設して給電するブラシ７と
を備えている。このブラシ７は、ハウジング２内
に固着されたブラシロツカー９内に嵌挿され、常
時バネ８によりアーマチユア５の盤面５ａに向か
つて押圧されている。(Prior Art) Conventionally, as shown in FIG. 1, a flat motor 1 is disposed opposite to a permanent magnet 3 provided in a housing 2 with a slight gap 4, and is rotatably attached to the housing 2. It includes a supported flat disk-shaped armature 5, and a brush 7 having a flat end surface 6 elastically protruding from a plate surface 5a of the armature 5 to supply power. This brush 7 is fitted into a brush locker 9 fixed in the housing 2, and is constantly pressed by a spring 8 toward the plate surface 5a of the armature 5.
しかしながら、このようにアーマチユア５の盤
面５ａをブラシ７が摺接するフラツトモータにお
いては、アーマチユア５の剛性強度に限界がある
ために、アーマチユア５とブラシ７との機械的摩
擦抵抗、およびアーマチユア摺動部の平面度が起
因してブラシやアーマチユアが振動し、その振動
がモータ構成部と共振し、ハウジング２からの騒
音輻射となりやすい構造となつている。 However, in a flat motor in which the brush 7 slides on the plate surface 5a of the armature 5, there is a limit to the rigidity of the armature 5, so the mechanical frictional resistance between the armature 5 and the brush 7 and the sliding part of the armature are limited. The structure is such that the brush and armature vibrate due to the flatness, and the vibration resonates with the motor components, which tends to cause noise radiation from the housing 2.
現在、一般にフラツトモータに使用されている
ブラシを大別すると、(A)天然黒鉛質ブラシ(B)電気
黒鉛質ブラシおよび(C)金属黒鉛質ブラシがある。 The brushes currently generally used in flat motors can be roughly divided into (A) natural graphite brushes, (B) electrographite brushes, and (C) metal graphite brushes.
しかしながら、前記ブラシのうち、天然黒鉛質
ブラシおよび電気黒鉛質ブラシは接触抵抗は低い
が、ブラシの固有抵抗が大きいために接触電圧降
下が大きくなるとともに、電流密度を大きくとれ
ないという欠点がある。一方、金属黒鉛質ブラシ
は、炭素粉末または黒鉛粉末と、銅等の導電性金
属粉末と、鉛等の潤滑金属粉末とを固化成形して
焼成し、所定の形状および寸法に裁断してなるも
のであり、これによりブラシの固有抵抗をある程
度低下させ電流密度を大きくしていた。 However, among the brushes, natural graphite brushes and electrographite brushes have a low contact resistance, but have a drawback that their specific resistance is large, resulting in a large contact voltage drop and an inability to obtain a large current density. On the other hand, metal graphite brushes are made by solidifying and molding carbon powder or graphite powder, conductive metal powder such as copper, and lubricating metal powder such as lead, and then cutting it into a predetermined shape and size. This lowered the specific resistance of the brush to some extent and increased the current density.
（発明が解決しようとする問題点）
しかしながら、この金属黒鉛質ブラシは、前記
のごとき粉末物質を形成し焼成してなるものであ
るから、ミクロ的には第２図に示すように、固有
抵抗の大きい黒鉛質粉末ａと、固有抵抗の小さい
導線性金属粉末ｂと、潤滑金属粉末ｃとの種々異
なる粉末が不規則かつ独立に配列している遊離体
であるので、各構成素子、例えば導電性金属粉末
ｂにおいては連続性がなく、このためブラシの固
有抵抗を下げることは困難である。しかして、固
有抵抗を下げようとすれば銅等のごとき導電性金
属の含有量を増大させる必要がある。(Problems to be Solved by the Invention) However, since this metal-graphite brush is made by forming and firing the above-mentioned powder material, microscopically it has a specific resistance as shown in Figure 2. Since it is a loose body in which various powders such as a graphite powder a with a large resistance, a conductive metal powder b with a small resistivity, and a lubricating metal powder c are arranged irregularly and independently, each component, e.g. Since there is no continuity in the metallic powder b, it is difficult to lower the specific resistance of the brush. Therefore, in order to lower the resistivity, it is necessary to increase the content of conductive metal such as copper.
ところが、導電性金属の含有量を増大させれば
接触抵抗が増すと共に機械的な摩擦抵抗も増加
し、アーマチユアおよびブラシの振動を誘発し、
モータの輻射騒音が増大するという欠点があつ
た。 However, increasing the content of conductive metal increases contact resistance and mechanical frictional resistance, which induces vibrations in the armature and brushes.
The drawback was that the radiated noise of the motor increased.
本発明は、前記のごとき従来のブラシの諸欠点
を解消するためになされたもので、ブラシの接触
抵抗、摩擦抵抗及び固有抵抗を共に低くすること
によつて、電流密度を大きくとりつつ接触電圧降
下及び摩擦抵抗を小さくし、ブラシの振動を誘発
するおそれのない理想的なモータ用ブラシを提供
することを目的とするものである。 The present invention was made in order to eliminate the various drawbacks of the conventional brushes as described above, and by lowering the contact resistance, frictional resistance, and specific resistance of the brush, it is possible to increase the current density while increasing the contact voltage. The object of the present invention is to provide an ideal motor brush that has low falling and frictional resistance and is free from the risk of inducing brush vibration.
（問題点を解決するための手段）
上記目的を達成するために本発明では、連続気
孔を有する発泡金属からなる導電体を炭素粉末ま
たは黒鉛粉末と一体的に形成し、焼成したことを
特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that a conductor made of a foamed metal having continuous pores is integrally formed with carbon powder or graphite powder, and then fired. It is something to do.
（作用）
このように構成したモータ用ブラシには、その
内部の全域にわたつて連続気孔を有する発泡金属
からなる導電体が均一に存在することになり、ま
た、炭素粉末または黒鉛粉末も均一に存在するこ
とになるので、ブラシの固有抵抗および接触抵抗
を共に低下することになり、電流密度の増大と接
触抵抗の減少とを共に図ることができることにな
る。また、摩擦抵抗も小さくなるのでアーマチユ
アおよびブラシの振動の発生を抑制することもで
きる。(Function) In the motor brush configured in this way, a conductor made of foamed metal with continuous pores is uniformly present throughout the interior, and carbon powder or graphite powder is also uniformly present throughout the interior. Since it exists, both the specific resistance of the brush and the contact resistance are reduced, and it is possible to increase the current density and reduce the contact resistance. Furthermore, since the frictional resistance is reduced, vibrations of the armature and brush can be suppressed.
（実施例）
つぎに、図面を参照しながら本発明の一実施例
を説明する。(Example) Next, an example of the present invention will be described with reference to the drawings.
すなわち、第３図に示すように、連続気孔を有
する発泡金属から成る導電体（以下、連続気孔導
電体という。）１１を、炭素粉末、黒鉛粉末等の
ように固有抵抗の大きい黒鉛質粉末１２とともに
所定の形状及び寸法に一体形成したのち、焼成す
ることによつて焼結するものであつて、必要によ
り、さらに所望の形状及び寸法に裁断される。こ
のようにして、第３図に示すように、連続気孔導
電体１１の間に黒鉛粉末１２が充填されたブラシ
１３が得られる。 That is, as shown in FIG. 3, a conductor 11 made of a foamed metal having open pores (hereinafter referred to as an "open pore conductor") is mixed with a graphite powder 12 having a high specific resistance such as carbon powder or graphite powder. After being integrally formed with a predetermined shape and size, it is sintered by firing, and if necessary, it is further cut into a desired shape and size. In this way, as shown in FIG. 3, a brush 13 in which graphite powder 12 is filled between continuous pore conductors 11 is obtained.
尚、前記連続気孔導電体１１は、発泡金属とい
われるものであつて、その材料となる導電性金属
としては、銅、アルミニウム、銀等またはそれら
の合金がある。連続気孔導電体１１は、内部に連
続した多数の気孔を有するスポンジ状の金属であ
り、その構成金属の平均等価線径は通常10〜500
μ、好ましくは50〜200μである。その製造方法
は、例えば、連続気孔を有する合成樹脂発泡体の
内部表面に金属被覆をメツキあるいはその他の方
法で形成させたのち、前記合成樹脂発泡を燃焼除
去するか、あるいは金属粉末を燃焼させることに
より行なわれる。 The continuous pore conductor 11 is called foamed metal, and the conductive metal used as its material includes copper, aluminum, silver, etc., or alloys thereof. The continuous pore conductor 11 is a sponge-like metal having a large number of continuous pores inside, and the average equivalent wire diameter of its constituent metals is usually 10 to 500.
μ, preferably 50 to 200 μ. The manufacturing method includes, for example, forming a metal coating on the inner surface of a synthetic resin foam having open pores by plating or other methods, and then burning and removing the synthetic resin foam, or burning metal powder. This is done by
第４図は、本発明の他の実施例を示すもので、
前記のごとき連続気孔導電体１１の表面に銀、
金、白金、パラジウム、錫等のような固有抵抗の
小さい導電性金属の被膜１４を、前記導電体１１
を前記導電性金属化合物の溶液中に浸漬してメツ
キ、その他の方法により形成されたのち、第３図
の場合と同様に黒鉛質粉末１２とともに一体形成
し、ついで焼成することにより得られる固有抵抗
の小さいモータ用ブラシ１３である。 FIG. 4 shows another embodiment of the present invention,
Silver on the surface of the continuous pore conductor 11 as described above,
A coating 14 of a conductive metal with low specific resistance such as gold, platinum, palladium, tin, etc. is applied to the conductor 11.
is immersed in a solution of the conductive metal compound and formed by plating or other methods, then integrally formed with graphite powder 12 as in the case of FIG. 3, and then fired. This is a small motor brush 13.
また、第５図は、本発明のさらに他の実施例を
示すもので、前記のごとき連続気孔導電体１１の
表面に、錫等のような潤滑金属の被膜１５を前記
導電体１１を前記潤滑金属化合物の溶液に浸漬し
てメツキ、その他の方法により形成されたのち、
第３図の場合と同様に黒鉛質粉末１２とともに一
体形成し、ついで焼成することにより得られるブ
ラシとコミテーターとの摩擦係数の小さなモータ
用ブラシ１３である。 Further, FIG. 5 shows still another embodiment of the present invention, in which a coating 15 of a lubricating metal such as tin is applied to the surface of the continuous pore conductor 11 as described above to lubricate the conductor 11. After being formed by immersion in a solution of metal compounds, plating, or other methods,
This motor brush 13 has a small friction coefficient between the brush and the commutator, which is obtained by integrally forming the brush with the graphite powder 12 and then firing it, as in the case of FIG. 3.
さらに、第６図は、本発明の別の実施例を示す
もので、前記のごとき連続気孔導電体１１を、炭
素粉末、黒鉛粉末等のように固有抵抗の大きい黒
鉛質粉末１２に、鉛等の潤滑金属粉末１６および
鉛、銀、錫、金、白金、パラジウム、アルミニウ
ム等の低固有抵抗粉末１７のいずれか一方または
両方を混合して一体形成し、焼成することにより
固有抵抗および摩擦係数の小さいブラシ１３が得
られる。この場合に、前記連続気孔導電体１１の
代りに、第４図に示すような導電性金属被膜１４
を有する連続気孔導電体または第５図に示すよう
な潤滑金属被膜１５を有する連続気孔導電体を用
いて同様に製造することもできる。 Furthermore, FIG. 6 shows another embodiment of the present invention, in which the continuous pore conductor 11 as described above is replaced with a graphite powder 12 having a high specific resistance such as carbon powder, graphite powder, etc. The lubricating metal powder 16 and the low resistivity powder 17 such as lead, silver, tin, gold, platinum, palladium, aluminum or the like are mixed together, formed into one, and fired to improve the resistivity and coefficient of friction. A small brush 13 is obtained. In this case, instead of the continuous pore conductor 11, a conductive metal coating 14 as shown in FIG.
Similarly, an open pore conductor having a lubricating metal coating 15 as shown in FIG. 5 may be used.
（発明の効果）
以上述べたように、本発明によるモータ用ブラ
シは、連続気孔導電体を炭素粉末または黒鉛粉末
と一体的に形成し、焼成してなるものであるか
ら、導電体はブラシ内の全域にわたつて連続して
均一に存在することになる。したがつて、このよ
うなブラシを使用すれば、コミテータは常にこの
連続気孔導電体と接触することになるので、ブラ
シの固有抵抗は低減するにも拘らず、導電性金属
粉末の含有量を特に増大させる必要もなく、この
ため、コミテータとブラシとの摩擦係数はなんら
増大することはない。また、前記連続気孔導電体
の表面に銀、金、白金、パラジウム、錫等のよう
な固有抵抗の小さい導電性金属の被膜を形成させ
ておけば、ブラシの固有抵抗はさらに減少する。
さらに、前記連続気孔導電体の表面に鉛等のよう
な潤滑金属の被膜を形成させておけば、コミテー
タとブラシとの摩擦抵抗はさらに減少する。(Effects of the Invention) As described above, the motor brush according to the present invention is formed by integrally forming a continuous pore conductor with carbon powder or graphite powder and firing it, so that the conductor is inside the brush. It exists continuously and uniformly over the entire area. Therefore, when using such brushes, the commutator will always be in contact with this open-pore conductor, so that even though the resistivity of the brush is reduced, the content of the conductive metal powder is particularly limited. There is no need to increase the friction coefficient between the commutator and the brush, so the coefficient of friction between the commutator and the brush does not increase at all. Furthermore, if a film of a conductive metal with low resistivity such as silver, gold, platinum, palladium, tin, etc. is formed on the surface of the continuous pore conductor, the resistivity of the brush can be further reduced.
Furthermore, if a coating of a lubricating metal such as lead is formed on the surface of the continuous pore conductor, the frictional resistance between the commutator and the brush can be further reduced.
第１図は、フラツトモータの断面図、第２図
は、従来のフラツトモータ用ブラシにおける構成
素子の配列モデル、第３〜６図は、本発明による
モータ用ブラシの構成を示すモデル断面図であ
る。
１１…連続気孔導電体、１２…黒鉛質粉末、１
３…モータ用ブラシ、１４…導電性金属被膜、１
５…潤滑金属被膜、１６…潤滑金属粉末、１７…
低固有抵抗金属粉末。
FIG. 1 is a sectional view of a flat motor, FIG. 2 is a model of the arrangement of constituent elements in a conventional flat motor brush, and FIGS. 3 to 6 are model sectional views showing the configuration of a motor brush according to the present invention. 11... Continuous pore conductor, 12... Graphite powder, 1
3... Motor brush, 14... Conductive metal coating, 1
5... Lubricating metal coating, 16... Lubricating metal powder, 17...
Low resistivity metal powder.
Claims (1)
炭素粉末または黒鉛粉末と一体的に形成し、焼成
してなるモータ用ブラシ。 ２ 連続気孔を有する発泡金属からなる導電体の
表面に固有抵抗の小さい金属の被膜を形成させて
なる特許請求の範囲第１項に記載のモータ用ブラ
シ。 ３ 連続気孔を有する発泡金属からなる導電体の
表面に潤滑金属の被膜を形成させてなる特許請求
の範囲第１項に記載のモータ用ブラシ。 ４ 炭素粉末または黒鉛粉末に、潤滑金属粉末お
よび低固有抵抗金属粉末を混合して一体的に形成
し、焼成してなる特許請求の範囲第１項ないし第
３項のいずれか一つに記載のモータ用ブラシ。[Scope of Claims] 1. A motor brush made by integrally forming a conductor made of foamed metal with continuous pores with carbon powder or graphite powder, and firing the conductor. 2. The motor brush according to claim 1, wherein a metal coating with low specific resistance is formed on the surface of a conductor made of a metal foam having continuous pores. 3. The motor brush according to claim 1, wherein a lubricating metal film is formed on the surface of a conductor made of a foamed metal having continuous pores. 4. The method according to any one of claims 1 to 3, which is formed by mixing carbon powder or graphite powder with lubricating metal powder and low resistivity metal powder, and firing the mixture. Brush for motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9941679A JPS5624778A (en) | 1979-08-06 | 1979-08-06 | Brush for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9941679A JPS5624778A (en) | 1979-08-06 | 1979-08-06 | Brush for motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5624778A JPS5624778A (en) | 1981-03-09 |
| JPS6245670B2 true JPS6245670B2 (en) | 1987-09-28 |
Family
ID=14246863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9941679A Granted JPS5624778A (en) | 1979-08-06 | 1979-08-06 | Brush for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5624778A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950013548B1 (en) * | 1989-05-02 | 1995-11-08 | 미쓰비시 덴키 가부시키가이샤 | Idle control device for an internal combustion engine |
| US5879747A (en) * | 1992-10-20 | 1999-03-09 | Nippondenso Co., Ltd. | Composite material and process of producing same |
-
1979
- 1979-08-06 JP JP9941679A patent/JPS5624778A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5624778A (en) | 1981-03-09 |
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