JPS6138387Y2 - - Google Patents
Info
- Publication number
- JPS6138387Y2 JPS6138387Y2 JP6355978U JP6355978U JPS6138387Y2 JP S6138387 Y2 JPS6138387 Y2 JP S6138387Y2 JP 6355978 U JP6355978 U JP 6355978U JP 6355978 U JP6355978 U JP 6355978U JP S6138387 Y2 JPS6138387 Y2 JP S6138387Y2
- Authority
- JP
- Japan
- Prior art keywords
- frame
- motor
- protrusion
- bracket
- small
- 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 4
- 238000012856 packing Methods 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
- Dc Machiner (AREA)
Description
【考案の詳細な説明】
本考案は小型直流モータの絶縁劣化保護装置に
関するもので、例えばプリンター等の過酷な使用
によるカーボンブラシの摩耗粉がモータ内部に充
満し、このカーボン粉によつて起こるモータの絶
縁抵抗劣化を防止しようとするものである。また
モータのブラシ摺動音が外部へ洩れることも防止
しようとするものである。[Detailed description of the invention] This invention relates to an insulation deterioration protection device for a small DC motor. The aim is to prevent deterioration of insulation resistance. It is also intended to prevent the sound of the brush sliding of the motor from leaking to the outside.
従来、この種のモータでは、内部に充満し、フ
レーム内面等の金属部に貼り付いたカーボン粉の
ため、ブラケツトの端子部とフレーム内面の間に
沿面放電が起こり、この間での絶縁抵抗の劣化
や、さらに進行すると、短絡状態になる可能性が
あつた。また、モータのランニングが進むにつ
れ、カーボンが摩耗し、整流子が荒れることによ
つて機械雑音が増加して来るという現象も見られ
た。 Conventionally, in this type of motor, creeping discharge occurred between the terminals of the bracket and the inner surface of the frame due to carbon powder that filled the inside and stuck to metal parts such as the inner surface of the frame, resulting in deterioration of insulation resistance between them. If the problem progressed further, there was a possibility of a short-circuit condition. Additionally, as the motor continued to run, the carbon wore out and the commutator became rough, causing an increase in mechanical noise.
本考案は上記従来の欠点に鑑みてなされたもの
で、以下本考案の実施例を添付図面を参照して説
明する。図において、１は金属製モータフレー
ム、２はフレーム１の内面に固着した界磁用マグ
ネツト、３は界磁用マグネツト２に対向して回転
自在に設けたアマチユア、４は遠心力ガバナスイ
ツチ、５は整流子、６はフレーム内径より外径寸
法が小さい壁状の突起部７を有する合成樹脂製の
ブラケツトで、整流子５に接触する刷子８、この
刷子８に電気的、機械的に接続した端子板９が取
付けられている。１０はリング状のゴム製パツキ
ングである。以上の構成において、組立時、ブラ
ケツト６にアマチユア３を挿入し、さらにフレー
ム１を挿入してフレーム１をカシメ付けてモータ
を組むわけであるが、フレーム１を挿入する際、
ゴムパツキン１０をフレーム１の内面に設けたマ
グネツト２の底部円周面とブラケツト６に設けた
突起部７の間に挾み、押え込んで、モータを構成
する。このようにすれば、モータの整流子５の付
近にはフレーム１の金属部が露出することがない
ので、カーボン粉がモータ内部に充満しても端子
９とフレーム１の間には高い絶縁が保たれる。 The present invention has been devised in view of the above-mentioned drawbacks of the conventional art, and embodiments of the present invention will now be described with reference to the accompanying drawings. In the figure, 1 is a metal motor frame, 2 is a field magnet fixed to the inner surface of the frame 1, 3 is an armature rotatably provided opposite to the field magnet 2, 4 is a centrifugal force governor switch, and 5 is a The commutator 6 is a bracket made of synthetic resin having a wall-like protrusion 7 whose outer diameter is smaller than the inner diameter of the frame, a brush 8 in contact with the commutator 5, and a terminal electrically and mechanically connected to the brush 8. A plate 9 is attached. 10 is a ring-shaped rubber packing. In the above configuration, when assembling, the armature 3 is inserted into the bracket 6, the frame 1 is further inserted, and the frame 1 is caulked to assemble the motor.
A motor is constructed by sandwiching and pressing a rubber gasket 10 between the bottom circumferential surface of a magnet 2 provided on the inner surface of a frame 1 and a protrusion 7 provided on a bracket 6. In this way, the metal part of the frame 1 will not be exposed near the commutator 5 of the motor, so even if the inside of the motor is filled with carbon powder, high insulation will be maintained between the terminals 9 and the frame 1. It is maintained.
また、ブラケツト６の突起部７の外径をフレー
ム内径よりも小さくしてフレーム内面に沿わせる
ことにより、ゴムパツキン１０はマグネツト２の
端面と突起部７に挾まれ、フレーム１とブラケツ
ト６との嵌合部の隙間を封止し、機械雑音が外部
へ漏れるのを防止している。すなわち、従来この
種のモータにおいては、ブラケツトとフレームと
の嵌合には空隙があり、密閉が不完全であるた
め、整流子とカーボン刷子の摺動音がフレームと
ブラケツトの嵌合部の隙間から漏れ出ていたが、
上記構成によればこの摺動音もゴムパツキンの密
着性により外部へ漏ることを防ぐ効果があるもの
である。 Furthermore, by making the outer diameter of the protrusion 7 of the bracket 6 smaller than the inner diameter of the frame and aligning it with the inner surface of the frame, the rubber gasket 10 is sandwiched between the end face of the magnet 2 and the protrusion 7, and the frame 1 and the bracket 6 are fitted together. The joint gap is sealed to prevent mechanical noise from leaking outside. In other words, in conventional motors of this type, there is a gap in the fitting between the bracket and the frame, and the sealing is incomplete, so the sliding noise of the commutator and carbon brush is caused by the gap between the fitting part of the frame and the bracket. It was leaking from the
According to the above structure, this sliding noise is also effectively prevented from leaking to the outside due to the tightness of the rubber gasket.
以上のように本考案によるゴムパツキングをフ
レームとブラケツト間に挾み込むことによつて、
カーボン粉による絶縁劣化を防止することがで
き、機械雑音の低減にも効果大なるものである。 As described above, by inserting the rubber packing according to the present invention between the frame and the bracket,
It is possible to prevent insulation deterioration due to carbon powder, and is also highly effective in reducing mechanical noise.
図は本考案の実施例にかかる小型直流モータの
断面図である。
１……モータフレーム、２……界磁用マグネツ
ト、６……ブラケツト、７……突起部、１０……
ゴムパツキング。
The figure is a sectional view of a small DC motor according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Motor frame, 2...Field magnet, 6...Bracket, 7...Protrusion, 10...
Rubber patch king.
Claims (1)
トを固着してなる小型直流モータにおいて、前記
モータフレームに嵌合される合成樹脂にて成形さ
れたブラケツトの外径円周上にフレーム内径より
外径寸法が小さい壁状の突起部を設け、この突起
部により包囲される空間内に整流子と刷子を位置
させ、かつ、前記突起部と前記マグネツトとの隙
間にリング状のゴムパツキングを挾み込んでなる
小型直流モータ。 In a small DC motor in which a field magnet is fixed to the inner surface of a metal motor frame, the outer diameter of a bracket molded from synthetic resin that is fitted onto the motor frame is larger than the inner diameter of the frame. A small wall-shaped protrusion is provided, a commutator and a brush are positioned in a space surrounded by the protrusion, and a ring-shaped rubber packing is inserted into the gap between the protrusion and the magnet. Small DC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6355978U JPS6138387Y2 (en) | 1978-05-11 | 1978-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6355978U JPS6138387Y2 (en) | 1978-05-11 | 1978-05-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54164831U JPS54164831U (en) | 1979-11-19 |
| JPS6138387Y2 true JPS6138387Y2 (en) | 1986-11-06 |
Family
ID=28966855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6355978U Expired JPS6138387Y2 (en) | 1978-05-11 | 1978-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6138387Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0626050Y2 (en) * | 1989-01-31 | 1994-07-06 | 自動車電機工業株式会社 | Holder base mounting structure for small motors for automotive electrical components |
-
1978
- 1978-05-11 JP JP6355978U patent/JPS6138387Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54164831U (en) | 1979-11-19 |
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