JPS61244242A - Oscillation suppressor for brush for miniature motor - Google Patents

Oscillation suppressor for brush for miniature motor

Info

Publication number
JPS61244242A
JPS61244242A JP8375785A JP8375785A JPS61244242A JP S61244242 A JPS61244242 A JP S61244242A JP 8375785 A JP8375785 A JP 8375785A JP 8375785 A JP8375785 A JP 8375785A JP S61244242 A JPS61244242 A JP S61244242A
Authority
JP
Japan
Prior art keywords
brush
density foam
foam substance
oscillation
low
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.)
Granted
Application number
JP8375785A
Other languages
Japanese (ja)
Other versions
JPH065974B2 (en
Inventor
Yoshihiko Funato
船渡 嘉彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60083757A priority Critical patent/JPH065974B2/en
Publication of JPS61244242A publication Critical patent/JPS61244242A/en
Publication of JPH065974B2 publication Critical patent/JPH065974B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K13/00Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/10Arrangements of brushes or commutators specially adapted for improving commutation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

PURPOSE:To absorb oscillation in a wide range and enable foreign matters to be easily avoided, by organizing an oscillation suppressor fitted on a brush plate spring, with high density foam substance and low density foam substance integrated with each other. CONSTITUTION:On a brush 2 supported by a brush-supporting base 1, an oscillation suppressor organized with high density foam substance 11 and low density foam substance 10 integrated with each other is fitted. The absorption of oscillation frequency specially in a wide range is realized by the surface layer of the high density foam substance 11, and foreign matters are hardly stuck, and the absorption of oscillation frequency in a narrow range is realized by the low density foam substance 10. Polyurethane, for example is used for the foam substance.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、音響映像分野、情報家電分野のあらゆる機器
に使用する小型モータの刷子mす振材に関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a brush oscillation material for small motors used in all types of equipment in the audiovisual field and information home appliance field.

従来の技術 近年、小型モータにおける刷子構造は、弾性を有する導
電材料と、コミュテータとの摺動の売主じる振動を吸収
するシート材によって形成されている。この小型モータ
の刷子構造による、副搬効果で、コミュテータと摺動す
る刷子(弾性を有する導電材料)との間で発生する火花
や、振動による機械雑音が太き(左右される。
BACKGROUND OF THE INVENTION In recent years, the brush structure of small motors has been made of an elastic conductive material and a sheet material that absorbs vibrations caused by sliding with a commutator. The brush structure of this small motor causes mechanical noise due to sparks and vibrations generated between the commutator and the sliding brush (elastic conductive material) due to side effects.

以下図面を参照しながら、上述した従来の小型モータの
刷子構造について説明する。
The brush structure of the conventional small motor mentioned above will be described below with reference to the drawings.

第3図は、従来の小型モータの刷子構造を示すものであ
る。第3図において、1は刷子支持基部である。2は弾
性を有する導電材料より成る刷子である。3はコミュテ
ータ導電性個片である。4はモータのシャフトである。
FIG. 3 shows the brush structure of a conventional small motor. In FIG. 3, 1 is a brush support base. 2 is a brush made of an elastic conductive material. 3 is a commutator conductive piece. 4 is the shaft of the motor.

5はコミュテータ個片を保持する樹脂部である。以上の
構成において、モータが第3図の矢印の方向に回転する
と、刷子2とコミュテータ個片3は、導体どうしの摺動
接触を保ちながら、適度の接触抵抗により電気的な働き
を行うものである。
Reference numeral 5 denotes a resin portion that holds the individual commutator pieces. In the above configuration, when the motor rotates in the direction of the arrow in Fig. 3, the brush 2 and the commutator pieces 3 perform electrical work with appropriate contact resistance while maintaining sliding contact between the conductors. be.

発明が解決しようとする問題点 しかし、第3図に示すスリット部aの個所においては、
個片間の段差やパリ等の外部要因により、コミュテータ
3と刷子2との間で、不規則な振動が生じ易く、火花が
発生する。゛この火花により、更にコミュテータ個片の
金属磨耗が促進し、コミュテータ3と刷子2との間で振
動が増加される。この火花による金属磨耗はコミュテー
タ3だけではな(、刷子2も磨耗する(転移現象)。
Problems to be Solved by the Invention However, at the slit portion a shown in FIG.
Irregular vibrations are likely to occur between the commutator 3 and the brush 2 due to external factors such as differences in level between the individual pieces or gaps, and sparks are generated. ``This spark further accelerates the metal wear of the commutator pieces and increases the vibration between the commutator 3 and the brush 2. Metal abrasion due to this spark occurs not only in the commutator 3, but also in the brush 2 (transfer phenomenon).

又、振動だけでな(火花のアーク時間が長(なる程、雰
囲気中の有機物との結びつきで、コミュテータ3や刷子
2の摺動面に酸化物が形成され、接触抵抗の増大に結び
つく。
In addition to the vibration alone, the arcing time of the spark is long (I see, by combining with organic matter in the atmosphere, oxides are formed on the sliding surfaces of the commutator 3 and the brush 2, leading to an increase in contact resistance.

この様な現象が進んでゆくと、モータの特性である起動
電圧等が高くなり、モータが動作しなくなった。す、極
めてモータの信頼性を低くする事になる。火花のアーク
時間が長くなると、電気機器等への電気雑音としても悪
影響を及ぼす。そこで従来より、第4図に示す様なゴム
材6と接着材7により振動吸収をおこなってきたが、広
帯域による振動吸収が充分なされていない。又、従来の
ゴム材6においては、一体物であり、又、ゴム表面が凹
凸や粘度が高(なっており、ゴミ(毛羽)等が付着して
も、除去しにくいものとなっている。
As this phenomenon progresses, the starting voltage, which is a characteristic of the motor, increases and the motor no longer operates. This will greatly reduce the reliability of the motor. When the arcing time of the spark becomes longer, it also has an adverse effect on electrical equipment and the like as electrical noise. Conventionally, vibration absorption has been carried out using a rubber material 6 and an adhesive material 7 as shown in FIG. 4, but vibration absorption over a wide band has not been achieved sufficiently. Further, the conventional rubber material 6 is a one-piece product, and the rubber surface is uneven and has a high viscosity, making it difficult to remove dust (fuzz) even if it adheres to it.

広帯域振動吸収の特性面からも、ゴム材6の硬度を低く
する必要があり、温度環境における加工性(切断)も難
しいものとなっている。
Also from the viewpoint of broadband vibration absorption characteristics, the hardness of the rubber material 6 needs to be low, and processability (cutting) in a temperature environment is also difficult.

以上のような構成では、広帯域の振動吸収および異物の
除去、又加工性を満足する小型モータの刷子割振材が、
見つかっていなかった。
With the above configuration, the brush allocation material for a small motor that satisfies broadband vibration absorption, foreign matter removal, and processability is
It hadn't been found.

本発明は、上記問題点に鑑み、広帯域による振動吸収と
異物の除去のやり易い、又あらゆる環境における加工性
を改善した小型モータの制振材を提供するものである。
In view of the above-mentioned problems, the present invention provides a vibration damping material for small motors that can easily absorb vibrations in a wide band and remove foreign substances, and has improved workability in all environments.

問題点を解決するための手段 上記問題点を解決するために本発明の小型モータの制振
材は、同一物性の制振材でありながら、密度の異なる多
重構造を備えたものである。
Means for Solving the Problems In order to solve the above-mentioned problems, the damping material for a small motor of the present invention is a damping material having the same physical properties but having a multilayered structure with different densities.

作用 本発明は上記した構成によって、高密度部分の表面層に
より、特に高域の振動周波数の吸収となめらかさにより
異物が付着しに<(、又除去しやすくなっている。又、
加工性の問題においては高密度物質によりカッティング
等の際、刃が一定のストロークで必ず切断可能となる。
Effect of the present invention Due to the above-described structure, the surface layer of the high-density portion absorbs especially high vibration frequencies and is smooth, making it difficult for foreign matter to adhere to the surface layer and making it easier to remove it.
In terms of workability, the high-density material ensures that the blade can cut with a constant stroke during cutting.

一方低密度物質は、特に低域振動周波数の吸収を可能と
した刷子の制振材としては最適のものとなる。この制振
材は、例えば一体物のポリウレタンシートであるが、シ
ート整形の際、同時に高密度ポリウレタンと低密度ポリ
ウレタンとに構成出来るものである。
On the other hand, low-density materials are particularly suitable as vibration damping materials for brushes that can absorb low vibration frequencies. This damping material is, for example, a one-piece polyurethane sheet, but it can be made into high-density polyurethane and low-density polyurethane at the same time when the sheet is shaped.

実施例 以下本発明の実施例の小型モータの刷子割振材について
、図面を参照しながら説明する。第1図は本発明の第1
の実施例における小型モータの刷子制振材の構造を示す
ものである。
EXAMPLE Hereinafter, a brush allocation material for a small motor according to an example of the present invention will be described with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
2 shows the structure of a brush damping material for a small motor in an embodiment of the present invention.

第1図において、11は高密度ポリウレタンシートであ
り、10は低密度ポリウレタンシートである。この様に
、同時整形で同材質の多重に構成された小型モータの刷
子割振材について、第1図及び第3図を用いてその動作
を説明する。
In FIG. 1, 11 is a high-density polyurethane sheet, and 10 is a low-density polyurethane sheet. The operation of the brush allocating material for a small motor, which is formed simultaneously and made of the same material in multiple layers, will be described with reference to FIGS. 1 and 3.

まず、第3図は、コミュテータ3がモータの回転と共に
矢印方向に回り、刷子2が不規則な振動を発生しながら
、電気的な導通を繰り返す。第1図の様な制振材10.
11を刷子2面に接着材等で固定させると第3図で発生
した不規則な撮動が、ポリウレタンシート10と11で
吸収される。特に同一物質のポリウレタンシートであり
ながら、低密度ポリウレタンシート10では、低帯域の
振動吸収がなされ、高密度ポリウレタンシート11では
、高帯域周波数の吸収と共に、広帯域による振動吸収が
なされる。これにより、モータの機械雑音の改善、火花
による電気機器に悪影響をおよぼす電気雑音の向上、コ
ミュテータ3と刷子2の磨耗(転移)を防ぎ高信頼性の
小型モータの刷子制振材とすることができる。以下本発
明の第2の実施例について図面を参照しながら説明する
First, in FIG. 3, the commutator 3 rotates in the direction of the arrow as the motor rotates, and the brush 2 repeats electrical conduction while generating irregular vibrations. Damping material 10 as shown in Figure 1.
When the polyurethane sheets 10 and 11 are fixed to the two surfaces of the brush with an adhesive or the like, the irregular photographing that occurs in FIG. 3 is absorbed by the polyurethane sheets 10 and 11. In particular, although they are polyurethane sheets made of the same material, the low-density polyurethane sheet 10 absorbs vibrations in a low band, and the high-density polyurethane sheet 11 absorbs vibrations in a wide band as well as in a high frequency band. This improves the mechanical noise of the motor, the electrical noise that adversely affects electrical equipment due to sparks, and prevents wear (transfer) between the commutator 3 and the brush 2, making it possible to create a highly reliable brush vibration damping material for small motors. can. A second embodiment of the present invention will be described below with reference to the drawings.

第2図は本発明の第2の実施例を示す小型モータの刷子
割振材の構成図である。同図において21は低密度ポリ
ウレタンシートであり、22は高密度ポリウレタンシー
トで以上は第1図の構成と同様なものである。第1図の
構成と異なるのは、両面高密度ポリウレタンシート24
を、A−A ’面にてスライスした点である。上記の様
に構成された小型モータの刷子制振材について以下動作
を説明する。
FIG. 2 is a configuration diagram of a brush allocator for a small motor showing a second embodiment of the present invention. In the figure, 21 is a low-density polyurethane sheet, and 22 is a high-density polyurethane sheet, which is the same as the structure shown in FIG. 1. The difference from the configuration shown in Figure 1 is that the double-sided high-density polyurethane sheet 24
This is the point obtained by slicing on the A-A' plane. The operation of the brush damping material for a small motor configured as described above will be described below.

超薄型および超小型モータの刷子制振材としては、制振
材の厚さをto、5以下のものもあり、尚広帯域の振動
吸収と可能とする場合、高密度ポリウレタン部の比率が
増すと低域での振動吸収が不充分となる。この様な場合
、tl、oのポリウレタンシートをスライスしてto、
5の厚さのシートとし、高密度部分と低密度部分の比率
を一定に保つことが出来、第1の実施例に示した動作に
よる効果を発揮することができる。
As brush damping materials for ultra-thin and ultra-small motors, the thickness of the damping material is to, 5 or less, and if broadband vibration absorption is possible, the ratio of high-density polyurethane parts increases. This results in insufficient vibration absorption in the low range. In such a case, slice the polyurethane sheet of tl, o,
5, the ratio of high-density parts to low-density parts can be kept constant, and the effect of the operation shown in the first embodiment can be exhibited.

尚、第1の実施例においては、高密度ポリウレタンシー
ト11を刷子2と平行に、置いた構造としたが刷子2と
垂直に置いてもよい。また第2の実施例では、低密度ポ
リウレタンシート21を刷子2に置いた構造としたが、
高密度ポリウレタンシート22を刷子2側に置いた構造
としてもよい。
In the first embodiment, the high-density polyurethane sheet 11 is placed parallel to the brush 2, but it may be placed perpendicular to the brush 2. Furthermore, in the second embodiment, the structure was such that the low density polyurethane sheet 21 was placed on the brush 2.
It is also possible to have a structure in which the high-density polyurethane sheet 22 is placed on the brush 2 side.

尚、第5図は刷子減衰特性を示すもので、(a)は制振
材がない場合、(b)は従来の制振材を用いた場合、(
c)は本発明の割振材を用いた場合のそれぞれの特性を
示すものである。
In addition, Fig. 5 shows the brush damping characteristics, (a) when there is no damping material, (b) when conventional damping material is used, (
c) shows the respective characteristics when using the allocation material of the present invention.

発明の効果 以上のように本発明は、低密度発泡体と高密度発泡体の
一体構造を設けることにより、小型モータの刷子制振材
とすることができる。
Effects of the Invention As described above, the present invention can be used as a brush damping material for a small motor by providing an integrated structure of a low-density foam and a high-density foam.

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

第1図は本発明の第1の実施例における小型モータの刷
子制振材の断面図、第2図は本発明の第2の実施例にか
かる断面図、第3図はコミュテータと刷子との構成図、
第4図は従来の刷子割振材の断面図、第5図は本発明の
刷子制振材と従来品との刷子減衰特性を比較して示す波
形図である。 2・・・・・・刷子、10.21・・・・・・低密度ポ
リウレタンシート、11.22・・・・・・高密度ポリ
ウレタンシート。 代理人の氏名 弁理士 中尾敏男 ほか1名/−45)
μ4奸 3−−−コ汰テータ 4−一−シデフト ト・1ジ訃のゴ°ムa 第4 t!l       ’F−$4列第5図
FIG. 1 is a cross-sectional view of a brush damping material for a small motor according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a second embodiment of the present invention, and FIG. Diagram,
FIG. 4 is a sectional view of a conventional brush damping material, and FIG. 5 is a waveform chart showing a comparison of the brush damping characteristics of the brush damping material of the present invention and a conventional product. 2... Brush, 10.21... Low density polyurethane sheet, 11.22... High density polyurethane sheet. Name of agent: Patent attorney Toshio Nakao and 1 other person/-45)
μ4奸3---Kotata 4-1-Sideft Tot・1st death rubber a 4th t! l'F-$4 column Figure 5

Claims (1)

【特許請求の範囲】[Claims] 刷子板バネに取り付けられる制振材を、高密度発泡体と
低密度発泡体の一体構造で構成してなる小型モータの刷
子制振材。
Brush vibration damping material for small motors, in which the damping material attached to the brush plate spring is composed of an integrated structure of high-density foam and low-density foam.
JP60083757A 1985-04-19 1985-04-19 Brush damping material for small motors Expired - Lifetime JPH065974B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60083757A JPH065974B2 (en) 1985-04-19 1985-04-19 Brush damping material for small motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60083757A JPH065974B2 (en) 1985-04-19 1985-04-19 Brush damping material for small motors

Publications (2)

Publication Number Publication Date
JPS61244242A true JPS61244242A (en) 1986-10-30
JPH065974B2 JPH065974B2 (en) 1994-01-19

Family

ID=13811425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60083757A Expired - Lifetime JPH065974B2 (en) 1985-04-19 1985-04-19 Brush damping material for small motors

Country Status (1)

Country Link
JP (1) JPH065974B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10833467B2 (en) * 2017-11-06 2020-11-10 Schleifring Gmbh Vibration absorbing device for slip-ring brushes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598275U (en) * 1982-07-01 1984-01-19 アルプス電気株式会社 DC motor brush device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598275U (en) * 1982-07-01 1984-01-19 アルプス電気株式会社 DC motor brush device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10833467B2 (en) * 2017-11-06 2020-11-10 Schleifring Gmbh Vibration absorbing device for slip-ring brushes

Also Published As

Publication number Publication date
JPH065974B2 (en) 1994-01-19

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