JPS6134870Y2 - - Google Patents
Info
- Publication number
- JPS6134870Y2 JPS6134870Y2 JP1980021113U JP2111380U JPS6134870Y2 JP S6134870 Y2 JPS6134870 Y2 JP S6134870Y2 JP 1980021113 U JP1980021113 U JP 1980021113U JP 2111380 U JP2111380 U JP 2111380U JP S6134870 Y2 JPS6134870 Y2 JP S6134870Y2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- case
- shaft
- side plate
- receiving part
- 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
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Landscapes
- Dc Machiner (AREA)
Description
【考案の詳細な説明】
この考案は、輻射ノイズの放出を防止した直流
モータの輻射ノイズ防止装置に関する。[Detailed Description of the Invention] This invention relates to a radiant noise prevention device for a DC motor that prevents the emission of radiant noise.
従来直流モータのブラシ・コミテータ間や機械
式ガバナ接点間の火花放電がモータから放出され
るのを防止するためにシールドケースを用いた
り、フイルター回路が接続されている。しかし、
フイルター回路が接続されても、リード線から伝
搬されるノイズが防止できるのみで、シヤフトが
ケースから突出され、かつ軸受面の油膜によつて
ケースとシヤフトが絶縁されていると、シヤフト
をアンテナとする前記火花放電の輻射ノイズの輻
射は防止されず、第１図のａのノイズ曲線とな
り、ラジオ特にFM帯域受信ラジオ等の雑音源と
なる等の欠点がある。 Conventionally, in order to prevent spark discharge between the brush and commutator of a DC motor or between mechanical governor contacts from being emitted from the motor, a shield case is used or a filter circuit is connected. but,
Even if a filter circuit is connected, it only prevents noise propagated from the lead wire.If the shaft is protruded from the case and the case and shaft are insulated by the oil film on the bearing surface, the shaft cannot be used as an antenna. The radiation of the radiated noise caused by the spark discharge is not prevented, resulting in a noise curve as shown in a of FIG. 1, which has the drawback of becoming a noise source in radios, especially FM band receiving radios.
本考案の目的は、上記欠点に鑑み、シヤフトか
ら輻射されることを防止した直流モータの輻射ノ
イズ防止装置を提案することにある。 SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to propose a radiation noise prevention device for a DC motor that prevents radiation from being radiated from the shaft.
本考案の特徴は、直流モータを導電性金属板よ
りなるモータ・ケースと、該ケースの側板に固定
保持すると共に前記ケースに導電接続し且つ小孔
を有するスラスト受部と、該受部に先端を当接す
る導電性金属よりなるシヤフトとを有するモータ
と、該モータと電源との間の回路に前記モータと
直列に接続したチヨークコイルと、前記モータに
並列に接続したコンデンサとで構成したことであ
る。 The present invention is characterized by a motor case made of a conductive metal plate for a DC motor, a thrust receiving part fixedly held on the side plate of the case, electrically connected to the case, and having a small hole, and a thrust receiving part having a small hole in the receiving part. A motor having a shaft made of conductive metal that comes into contact with the motor, a chiyoke coil connected in series with the motor in a circuit between the motor and a power source, and a capacitor connected in parallel to the motor. .
以下、図示の実施例によつて本考案を説明す
る。第２図で直流モータＭはモータケース１と側
板２に夫々固定された粉末合金よりなる含油軸受
メタル３，４でシヤフト５が軸承され、モータケ
ース１内に固定されたマグネツト６に対応するよ
うにシヤフト５にローター７が固定されてコミテ
ータ８にブラシ９が摺接されている。ブラシ９に
接続されたターミナル１０は制御回路素子が組み
込まれた印刷配線基板１１に半田付け接続されて
給電されている。前記モータケース１と印刷配線
基板１１はシールドケース１２とシールドケース
の側板１３で覆われている。前記側板２に形成さ
れた凹陥部２ａ内底面にはスラスト受部１４が設
けられ、スラスト受部１４上の凹陥部内に前記含
油軸受メタル４が嵌合固定されている。 The present invention will be explained below with reference to illustrated embodiments. In FIG. 2, a DC motor M has a shaft 5 supported by oil-impregnated bearing metals 3 and 4 made of powder alloy fixed to a motor case 1 and a side plate 2, respectively, and a shaft 5 supported by a magnet 6 fixed in the motor case 1. A rotor 7 is fixed to a shaft 5, and a brush 9 is in sliding contact with a commutator 8. A terminal 10 connected to the brush 9 is soldered and connected to a printed wiring board 11 in which a control circuit element is incorporated, and is supplied with power. The motor case 1 and printed wiring board 11 are covered with a shield case 12 and a side plate 13 of the shield case. A thrust receiving part 14 is provided on the inner bottom surface of the recessed part 2a formed in the side plate 2, and the oil-impregnated bearing metal 4 is fitted and fixed in the recessed part on the thrust receiving part 14.
前記モータケース１、側板２、シールドケース
１２、シールドケースの側板１３、スラスト受部
１４は導電性金属板で形成され、シヤフト５は導
電性金属材で形成されている。 The motor case 1, the side plate 2, the shield case 12, the side plate 13 of the shield case, and the thrust receiving part 14 are made of conductive metal plates, and the shaft 5 is made of a conductive metal material.
前記側板２の凹陥部２ａの底面には第３図のよ
うに小孔２ｂが穿設されている。 A small hole 2b is bored in the bottom of the concave portion 2a of the side plate 2, as shown in FIG.
前記直流モータの電源回路には第４図のように
チヨークコイル１５が直列に、コンデンサ１６が
並列に接続されている。 As shown in FIG. 4, a chiyoke coil 15 is connected in series and a capacitor 16 is connected in parallel to the power supply circuit of the DC motor.
直流モータが前記のように構成されると、含油
軸受メタル４より滲み出されたオイルは小孔２ｂ
から外部へ流出される。したがつて、シヤフト５
とスラスト受部１４との間には油膜が出来にく
く、シヤフトとスラスト受部は電気接触しやす
く、電気導通が得られやすいので、シヤフト５と
モータケース１は同電位となり、シヤフトがコミ
テータ８とブラシ９の摺接等で発正される火花放
電のアンテナの役目をしなくなる。その結果モー
タの輻射ノイズは第１図のノイズ曲線ｂとなり、
従来のノイズ曲線ａに比較して約20dbの軽減を
計ることができた。 When the DC motor is constructed as described above, the oil seeped out from the oil-impregnated bearing metal 4 flows through the small hole 2b.
leaked to the outside. Therefore, shaft 5
It is difficult for an oil film to form between the shaft and the thrust receiver 14, and the shaft and the thrust receiver easily come into electrical contact and electrical continuity is easily obtained, so the shaft 5 and the motor case 1 are at the same potential, and the shaft is connected to the commutator 8. It no longer functions as an antenna for spark discharges generated by sliding contact of the brush 9, etc. As a result, the motor radiation noise becomes noise curve b in Figure 1,
We were able to measure a reduction of approximately 20db compared to the conventional noise curve a.
前記第４図の電源回路のチヨークコイル１５が
トロイダルチヨークコイルで構成されると、ノイ
ズは第１図のノイズ曲線ｃとなりさらに改善され
る。 When the chiyoke coil 15 of the power supply circuit shown in FIG. 4 is constituted by a toroidal chiyoke coil, the noise becomes the noise curve c shown in FIG. 1 and is further improved.
第５図は銅粉末合金等の含油軸受メタル４にス
ラスト受部４ａが形成された実施例で、スラスト
受部４ａに小孔４ｂが形成されている。この実施
例の場合も前記と同様に含油軸受メタルから滲み
出たオイルは小孔４ｂから外部に流出されて、ス
ラスト受部とシヤフトの接触面は油膜でさまたげ
られず、シヤフトとモータケースは同電位にたも
たれる。 FIG. 5 shows an embodiment in which a thrust receiving portion 4a is formed in an oil-impregnated bearing metal 4 such as a copper powder alloy, and a small hole 4b is formed in the thrust receiving portion 4a. In the case of this embodiment as well, the oil oozing from the oil-impregnated bearing metal flows out from the small hole 4b, and the contact surface between the thrust receiver and the shaft is not obstructed by the oil film, and the shaft and motor case are the same. Leaning against the electric potential.
前記説明におけるモータの制御回路印刷配線基
板はシールドケース外部に設けてもよい。又チヨ
ークコイルはモータの両側に設けてもよい。 The motor control circuit printed wiring board in the above description may be provided outside the shield case. Further, the choke coils may be provided on both sides of the motor.
本考案は前述のように構成されたから、シヤフ
トがモータケースと同電位に接続されて火花放電
のアンテナ作用を持たないので輻射ノイズの発生
が防止され、特にラジオカセツトに用いられたと
き、FM受信帯域に与えるノイズ障害が改善され
る実用上優れた効果を奏するモータが得られる。 Since the present invention is constructed as described above, the shaft is connected to the same potential as the motor case and does not have the antenna effect of spark discharge, which prevents the generation of radiated noise.Especially when used in a radio cassette, it is useful for FM reception. A motor that exhibits excellent practical effects in which noise interference in the band is improved can be obtained.
第１図は従来例と本考案モータのノイズレベル
グラフ、第２図は本考案が実施されたモータの要
部断面側面図、第３図は本考案モータの要部断面
図、第４図は本考案モータ電源回路の説明図、第
５図は同上他の実施例要部断面図である。
１……モータケース、２……側板、２ａ……凹
陥部、２ｂ，４ｂ……小孔、３，４……軸受メタ
ル、５……シヤフト、１２……シールドケース、
１３……シールドケース側板、１４……スラスト
受部、１５……チヨークコイル、１６……コンデ
ンサ、Ｍ……直流モータ、ａ，ｂ，ｃ……ノイズ
曲線。
Fig. 1 is a noise level graph of the conventional example and the motor of the present invention, Fig. 2 is a sectional side view of the main part of the motor in which the invention has been implemented, Fig. 3 is a sectional view of the main part of the motor of the invention, and Fig. 4 is An explanatory diagram of the motor power supply circuit of the present invention, FIG. 5 is a sectional view of the main parts of another embodiment of the same. 1... Motor case, 2... Side plate, 2a... Recessed part, 2b, 4b... Small hole, 3, 4... Bearing metal, 5... Shaft, 12... Shield case,
13... Shield case side plate, 14... Thrust receiver, 15... Chi York coil, 16... Capacitor, M... DC motor, a, b, c... Noise curve.
Claims (1)
スの側板に固定保持すると共に前記ケースに導電
接続したスラスト受部と、該受部又は前記側板に
穿設した小孔と、該受部に先端を当接する導電性
金属よりなるジヤフトとを有するモーターと、該
モータと電源との間の回路に前記モータと直列に
接続したチヨークコイルと、前記モータに並列に
接続したコンデンサとを有する直流モータの輻射
ノイズ防止装置。 A motor case made of a conductive metal plate, a thrust receiving part fixedly held on a side plate of the case and conductively connected to the case, a small hole bored in the receiving part or the side plate, and a tip in the receiving part. Radiation noise of a DC motor that has a motor that has a shaft made of conductive metal that comes into contact with it, a chiyoke coil that is connected in series with the motor in a circuit between the motor and a power source, and a capacitor that is connected in parallel to the motor. Prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980021113U JPS6134870Y2 (en) | 1980-02-22 | 1980-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980021113U JPS6134870Y2 (en) | 1980-02-22 | 1980-02-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56123785U JPS56123785U (en) | 1981-09-21 |
| JPS6134870Y2 true JPS6134870Y2 (en) | 1986-10-09 |
Family
ID=29617285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980021113U Expired JPS6134870Y2 (en) | 1980-02-22 | 1980-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6134870Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716152Y2 (en) * | 1989-06-09 | 1995-04-12 | 株式会社スイケンテクノロジー | Joint structure of movable pipe joint |
-
1980
- 1980-02-22 JP JP1980021113U patent/JPS6134870Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56123785U (en) | 1981-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5139442A (en) | Modular jack | |
| US5942819A (en) | Motor brush assembly with noise suppression | |
| US4590614A (en) | Dipole antenna for portable radio | |
| US4384223A (en) | Radio-frequency interference suppressing system for permanent magnet field motor | |
| JPH0515361U (en) | Filter connector and shielding plate for filter connector | |
| GB2140218A (en) | Electric motor | |
| ES453920A1 (en) | Protectively covered mounting for a plug-in electronic apparatus of a motor vehicle | |
| US8217542B2 (en) | Electric motor | |
| JPS6134870Y2 (en) | ||
| US6276966B1 (en) | Jack with shield plate | |
| US5231322A (en) | Cartridge brush with integral filter inductor | |
| US4205891A (en) | Radio frequency interference suppressor connector | |
| US4077378A (en) | Distributor with noise suppressing device | |
| US6490171B2 (en) | Apparatus for shielding | |
| US20220060090A1 (en) | Electrical machine having an electronics circuit board which makes contact with a stator housing | |
| US3221223A (en) | Structure for by-passing radio energy to the housing of electrical apparatus | |
| JPS6217827B2 (en) | ||
| KR940000406Y1 (en) | Substrate of electric circuit | |
| GB2172754A (en) | Electric motor | |
| US4700157A (en) | Connector plug having a radio frequency suppression filter | |
| JPS6134754Y2 (en) | ||
| JPH0638432A (en) | Method for connecting grounding of direct current brushless motor | |
| JPS59771Y2 (en) | Electronics | |
| JPH0112790Y2 (en) | ||
| JPH021914Y2 (en) |