JPS6332025B2 - - Google Patents
Info
- Publication number
- JPS6332025B2 JPS6332025B2 JP23272282A JP23272282A JPS6332025B2 JP S6332025 B2 JPS6332025 B2 JP S6332025B2 JP 23272282 A JP23272282 A JP 23272282A JP 23272282 A JP23272282 A JP 23272282A JP S6332025 B2 JPS6332025 B2 JP S6332025B2
- Authority
- JP
- Japan
- Prior art keywords
- air guide
- bracket
- cooling fan
- rib
- electric 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
- 238000001816 cooling Methods 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、一般家庭で使われる電動機器に使わ
れる電動機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric motor used in electric appliances used in general households.
従来例の構成とその問題点
従来、この種の電動機は、電動機の温度上昇が
高く、冷却構造が設計上の大きな留意点となつて
いる。一般には第１図に示す様に鉄板で作られた
ブラケツト１を有するモータ２の軸３に固着され
た冷却フアン４により、冷却を行なつている。Conventional Structure and Problems Conventionally, this type of electric motor has a high temperature rise, and the cooling structure has been a major consideration in the design. Generally, as shown in FIG. 1, cooling is performed by a cooling fan 4 fixed to the shaft 3 of a motor 2 having a bracket 1 made of an iron plate.
冷却フアン４の性能を高め、又、冷却風が電動
機２に沿つて流れ易くするために、エアガイド５
が電動機２に取付けられている。エアガイド５の
効果を大きくするには冷却フアン４とエアガイド
仕切部６の隙間７を小さくすれば良い。しかし、
エアガイド５はその止め具部分をブラケツト１に
引つかけているだけで取付けているためエアガイ
ド５の位置規制が充分でなく、冷却フアン４とエ
アガイド５の接触を防ぐために隙間７をあまり小
さくする事ができない。そのため、第２図で示す
ようにエアガイド５に位置規制リブ８を設けて電
動機２に当接させる事により、エアガイド５の固
定を充分にし、隙間７を小さくする事は可能では
あるが、このようにすると、電動機の種々の振動
すなわちブラシ、ベアリング等に起因する振動が
エアガイド５へ伝わり易くなり、これらの振動を
拡大して大きな騒音を発生する事になる。すなわ
ち電動機２の金属部分にエアガイド５が接触する
と種々の振動が減衰する事なく同エアガイド５に
伝わり、振動する面積が広くなり騒音を拡大する
事になる。このため、鉄板でできた電動機２とエ
アガイド５の固定を充分にする事は、騒音上好ま
しくなく、結果として隙間７をあまり小さくする
事ができないところから、冷却フアン４の効率を
良くする事ができず、必要以上に大きな径の冷却
フアン４を使つており、このために生じる冷却フ
アン騒音が大きな問題になつている。 In order to improve the performance of the cooling fan 4 and to make it easier for cooling air to flow along the electric motor 2, an air guide 5 is provided.
is attached to electric motor 2. In order to increase the effect of the air guide 5, the gap 7 between the cooling fan 4 and the air guide partition 6 may be made smaller. but,
Since the air guide 5 is attached by simply hooking its stopper part onto the bracket 1, the position of the air guide 5 is not sufficiently regulated.In order to prevent the cooling fan 4 and the air guide 5 from coming into contact, the gap 7 must be left too large. It cannot be made smaller. Therefore, as shown in FIG. 2, it is possible to sufficiently fix the air guide 5 and reduce the gap 7 by providing a position regulating rib 8 on the air guide 5 and bringing it into contact with the electric motor 2. If this is done, various vibrations of the electric motor, that is, vibrations caused by brushes, bearings, etc., will be easily transmitted to the air guide 5, and these vibrations will be magnified to generate large noise. That is, when the air guide 5 comes into contact with a metal part of the electric motor 2, various vibrations are transmitted to the air guide 5 without being attenuated, and the vibrating area becomes wider, increasing noise. For this reason, it is undesirable to sufficiently fix the electric motor 2 and the air guide 5, which are made of iron plates, in terms of noise, and as a result, the gap 7 cannot be made very small, so it is necessary to improve the efficiency of the cooling fan 4. Therefore, a cooling fan 4 with a diameter larger than necessary is used, and the resulting cooling fan noise has become a major problem.
発明の目的
本発明は上述のような欠点を解消し、冷却効率
のすぐれたしかも騒音の低い電動機を提供するも
のである。OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and provides an electric motor with excellent cooling efficiency and low noise.
発明の構成
本発明の電動機は、回転子を軸支する合成樹脂
製のブラケツトと、回転子軸端に固着された冷却
フアンと、前記ブラケツトに取付けられ、かつ底
部に前記冷却フアンの外周部に位置する円穴を設
けた略円筒形のエアガイドとを有し、前記エアガ
イドの内底部に係合し、エアガイドの径方向およ
び軸方向位置を規制する位置規制リブとエアガイ
ドの内周部に設けたリブと嵌合してエアガイドの
下方への抜け止めを行なう取付リブを前記ブラケ
ツトに一体に形成する事により、冷却効率のすぐ
れた騒音の低い電動機を得るものである。Structure of the Invention The electric motor of the present invention includes a bracket made of synthetic resin that pivotally supports a rotor, a cooling fan fixed to the end of the rotor shaft, and a cooling fan attached to the bracket and attached to the outer circumference of the cooling fan at the bottom. a substantially cylindrical air guide with a circular hole for positioning; a position regulating rib that engages with the inner bottom of the air guide and regulates the radial and axial positions of the air guide; and an inner periphery of the air guide. By integrally forming a mounting rib on the bracket, which engages with a rib provided on the bracket and prevents the air guide from coming off downward, an electric motor with excellent cooling efficiency and low noise can be obtained.
実施例の説明
以下、添付図面に基づいて本発明の一実施例に
ついて説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
第３図、第４図において、１０は回転子で、樹
脂製のブラケツト１１で支持されている。１２は
固定子で、積層鉄板によつて作られ、合成樹脂脂
製のブラケツト１１に固定されている。１３は冷
却フアンで、回転子軸１４の一端に固着されてい
る。１５は略円筒形に構成され、かつ底部に冷却
フアン１３の外周部に位置する円穴を設けたエア
ガイドで、このエアガイド１５の内周部には三角
形の断面形状を有するリブ１５′が２本ずつ相対
向して設けられている。前記ブラケツト１１の外
側壁には、リブ１５′と嵌合するような三角形の
断面形状を有する溝１７を設けた取付リブ１６が
一体に形成されている。またブラケツト１１の底
部には、端部に円錐形の凹部１９′を設けた円筒
状の位置規制リブ１９が一体に形成されている。
また前記エアガイド１５の内底部には、前記位置
規制リブ１９の円錐形の凹部１９′と対峙するよ
うに円錐形凸部１８が４ケ所に設けられている。
そして前記エアガイド１５は、取付リブ１６とリ
ブ１５′が、また位置規制リブ１９の凹部１９′と
円錐形凸部１８がそれぞれ嵌合する事により、ブ
ラケツト１１の外周部に取付けられている。また
冷却フアン１３に対するエアガイド１５の径方向
及び軸方向の位置は、位置規制リブ１９により精
度良く決められ、かつ取付リブ１６は、エアガイ
ド１５の下方への抜け止めの役目を果たしてい
る。 In FIGS. 3 and 4, reference numeral 10 denotes a rotor, which is supported by a bracket 11 made of resin. A stator 12 is made of laminated iron plates and fixed to a bracket 11 made of synthetic resin. A cooling fan 13 is fixed to one end of the rotor shaft 14. Reference numeral 15 denotes an air guide having a substantially cylindrical shape and having a circular hole at the bottom located at the outer periphery of the cooling fan 13. On the inner periphery of the air guide 15, a rib 15' having a triangular cross-sectional shape is provided. Two of them are provided facing each other. A mounting rib 16 is integrally formed on the outer wall of the bracket 11 and is provided with a groove 17 having a triangular cross-sectional shape to fit into the rib 15'. Further, a cylindrical position regulating rib 19 having a conical recess 19' at its end is integrally formed at the bottom of the bracket 11.
Furthermore, conical convex portions 18 are provided at four locations on the inner bottom of the air guide 15 so as to face the conical concave portions 19' of the position regulating rib 19.
The air guide 15 is attached to the outer periphery of the bracket 11 by fitting the mounting rib 16 and the rib 15' and the concave portion 19' of the position regulating rib 19 and the conical convex portion 18, respectively. Further, the radial and axial positions of the air guide 15 with respect to the cooling fan 13 are precisely determined by the position regulating ribs 19, and the mounting ribs 16 serve to prevent the air guide 15 from slipping downward.
２０はブラシ、２１は整流子である。 20 is a brush, and 21 is a commutator.
次に作用について述べる。回転子１０を駆動す
ると冷却フアン１３が回転し、冷却風が矢印２２
の方向に流れて電動機を冷却する。この時エアガ
イド１５の冷却フアン１３に対する径方向の位置
は位置規制リブ１９により規制され、位置の精度
は各部品の寸法バラツキ範囲内に押えられ、取付
による位置精度のバラツキは殆んどない。 Next, we will discuss the effect. When the rotor 10 is driven, the cooling fan 13 rotates, and the cooling air flows in the direction of the arrow 22.
It flows in the direction of and cools the motor. At this time, the radial position of the air guide 15 relative to the cooling fan 13 is regulated by the position regulating rib 19, and the position accuracy is kept within the range of dimensional variations of each component, and there is almost no variation in position accuracy due to installation.
このため、冷却フアン１３とエアガイド１５の
仕切部２３との間の隙間２４は従来に比べ小さく
設計しても冷却フアン１３がエアガイド１５に接
触する事がなく、隙間２４を通して環流する空気
成分を大幅に減らす事ができる。すなわち、冷却
風は矢印２２のように流れるため、エアガイド１
５の内部は外部に比べ負圧となり、この場合、隙
間２４が大きいと、空気が外部からこの隙間２４
を介して内部へ逆流することになるが、本発明の
一実施例においては、前記隙間２４を小さくして
も冷却フアン１３がエアガイド１５に接触するこ
とはなく、したがつて前記隙間２４を小さくする
と、この部分の通風抵抗が大きくなるため、この
隙間２４を通してエアガイド１５の内部に逆流す
る空気成分を大幅に減らす事ができ、その結果、
冷却フアン１３の効率を大幅に改善できる。又、
電動機のベアリングやブラシの振動は、ブラケツ
ト１１が樹脂で作られているため、金属に比べる
と振動減衰能力が大きく、ブラケツト１１内で減
衰しエアガイド１５に伝達する事は少なく、ベア
リングやブラシの騒音がエアガイド１５で拡大さ
れる事は無い。 Therefore, even if the gap 24 between the cooling fan 13 and the partition 23 of the air guide 15 is designed to be smaller than before, the cooling fan 13 will not come into contact with the air guide 15, and the air components will circulate through the gap 24. can be significantly reduced. That is, since the cooling air flows as shown by the arrow 22, the air guide 1
5 has a negative pressure compared to the outside, and in this case, if the gap 24 is large, air will flow from the outside into this gap 24.
However, in one embodiment of the present invention, even if the gap 24 is made smaller, the cooling fan 13 will not come into contact with the air guide 15, and therefore the gap 24 will be reduced. If it is made smaller, the ventilation resistance of this part will increase, so the air component flowing back into the air guide 15 through this gap 24 can be significantly reduced, and as a result,
The efficiency of the cooling fan 13 can be greatly improved. or,
Since the bracket 11 is made of resin, the vibrations of the motor's bearings and brushes have a greater vibration damping ability than metal, and are attenuated within the bracket 11 and are less likely to be transmitted to the air guide 15. Noise is not amplified by the air guide 15.
発明の効果
上記実施例からあきらかなように本発明の電動
機は次のような効果を得ている。Effects of the Invention As is clear from the above embodiments, the electric motor of the present invention has the following effects.
(1) エアガイドをブラケツトの位置規制リブで位
置規制しながらエアガイドをブラケツトに嵌着
できるため、精度良く、エアガイドをブラケツ
トに取付ける事が可能になり、その結果、冷却
フアンとエアガイド仕切部との径方向の隙間を
従来に比べ大幅に小さくできるため、空気が逆
流するということはなくなり、その結果、冷却
フアンの効率を大幅に改善できる。(1) Since the air guide can be fitted to the bracket while regulating its position with the bracket's position regulating rib, it is possible to attach the air guide to the bracket with high accuracy, and as a result, the cooling fan and air guide partition Since the radial gap between the cooling fan and the cooling fan can be made much smaller than in the past, there will be no backflow of air, and as a result, the efficiency of the cooling fan can be greatly improved.
(2) ブラケツト、位置規制リブ、取付リブが合成
樹脂で一体に形成されているため、ベアリング
やブラシの振動がエアガイドに伝わる事は少な
く、これらの振動に起因する騒音が拡大される
事はない。(2) Since the bracket, position regulating rib, and mounting rib are integrally formed from synthetic resin, the vibrations of the bearings and brushes are less likely to be transmitted to the air guide, and the noise caused by these vibrations will not be amplified. do not have.
(3) 位置規制リブ、取付リブをブラケツトに、合
成樹脂により一体に形成しているため、別体で
形成したものに比べ、コスト的にも安価に提供
することができる。(3) Since the position regulating ribs and the mounting ribs are integrally formed on the bracket from synthetic resin, they can be provided at a lower cost than when they are formed separately.
第１図、第２図はそれぞれ従来の電動機を示す
断面図、第３図は本発明の一実施例を示す電動機
の断面図、第４図は本発明の一実施例のブラケツ
ト部の拡大斜視図である。
１０……回転子、１１……ブラケツト、１３…
…冷却用フアン、１５……エアガイド、１９……
位置規制リブ、１６……取付リブ。
FIGS. 1 and 2 are sectional views showing a conventional electric motor, FIG. 3 is a sectional view of an electric motor according to an embodiment of the present invention, and FIG. 4 is an enlarged perspective view of a bracket portion of an embodiment of the present invention. It is a diagram. 10...Rotor, 11...Bracket, 13...
...Cooling fan, 15...Air guide, 19...
Position regulating rib, 16...Mounting rib.
Claims (1)
と、回転子軸端に固着された冷却フアンと、前記
ブラケツトに取付けられ、かつ底部に前記冷却フ
アンの外周部に位置する円穴を設けた略円筒形の
エアガイドとを有し、前記エアガイドの内底部に
係合し、エアガイドの径方向および軸方向位置を
規制する位置規制リブとエアガイドの内周部に設
けたリブと嵌合してエアガイドの下方への抜け止
めを行なう取付リブを前記ブラケツトに一体に形
成した電動機。1. A bracket made of synthetic resin that pivotally supports the rotor, a cooling fan fixed to the end of the rotor shaft, and a circular hole attached to the bracket and located at the outer periphery of the cooling fan at the bottom. a cylindrical air guide, and a position regulating rib that engages with the inner bottom of the air guide and regulates the radial and axial positions of the air guide, and is fitted with a rib provided on the inner circumference of the air guide. The electric motor has a mounting rib integrally formed on the bracket to prevent the air guide from falling downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57232722A JPS59123443A (en) | 1982-12-28 | 1982-12-28 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57232722A JPS59123443A (en) | 1982-12-28 | 1982-12-28 | Electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59123443A JPS59123443A (en) | 1984-07-17 |
| JPS6332025B2 true JPS6332025B2 (en) | 1988-06-28 |
Family
ID=16943756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57232722A Granted JPS59123443A (en) | 1982-12-28 | 1982-12-28 | Electric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59123443A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11637474B2 (en) | 2021-03-19 | 2023-04-25 | Ametek, Inc. | Throughflow vacuum motor with reverse airflow |
-
1982
- 1982-12-28 JP JP57232722A patent/JPS59123443A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59123443A (en) | 1984-07-17 |
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