JPH023389B2 - - Google Patents
Info
- Publication number
- JPH023389B2 JPH023389B2 JP24962783A JP24962783A JPH023389B2 JP H023389 B2 JPH023389 B2 JP H023389B2 JP 24962783 A JP24962783 A JP 24962783A JP 24962783 A JP24962783 A JP 24962783A JP H023389 B2 JPH023389 B2 JP H023389B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- rotor
- large diameter
- fixed shaft
- fan
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 20
- 239000010687 lubricating oil Substances 0.000 description 11
- 239000000956 alloy Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【発明の詳細な説明】
［技術分野］
本発明は電動機、さらに詳しくは、筒状のハウ
ジングの軸方向の一端内周面から軸方向に沿つて
固定軸が突設され、ロータの回転中心に沿つてロ
ータと一体に設けられた軸受けが固定軸の外周面
に沿つて嵌挿される電動機に関するものである。Detailed Description of the Invention [Technical Field] The present invention relates to an electric motor, and more specifically, a fixed shaft is provided along the inner circumferential surface of one end in the axial direction of a cylindrical housing, and a fixed shaft is provided at the center of rotation of the rotor. This invention relates to an electric motor in which a bearing provided integrally with a rotor is fitted along the outer peripheral surface of a fixed shaft.
［背景技術］
一般に、筒状に形成されたハウジング１の軸方
向の一端内周面から固定軸２を突設するととも
に、この固定軸２にロータ３と一体に回転する軸
受け２５を嵌挿したこの種の電動機においては、
第１図に示す実開昭53―9841号公報に開示されて
いるように、潤滑油が含浸されたフエルトの油溜
め２６を固定軸２に沿つて配設するとともに、固
定軸２の両端部に対応して一対の軸受け２５を油
溜め２６の両端部を覆う形で配設することによ
り、油溜め２６から軸受け２５への給油を行なう
ようにしている。ところが、この構造において
は、ロータ３が回転すると油溜め２６内の潤滑油
は遠心力により油溜め２６の外周を覆う中空筒２
７の半径方向に流れるものであるから、油溜め２
６に対して中空筒２７の軸方向の両端部に配設さ
れた軸受へ２５には潤滑油が供給されないことが
ある。これにより、軸受け２５に油切れが生じや
すく、軸受け２５の寿命が短くなつたり、ロータ
３の回転に伴なう軸受け２５と固定軸２との間の
摩擦が大きくなつて騒音が生じたりするという問
題がある。[Background Art] Generally, a fixed shaft 2 is provided protruding from the inner circumferential surface of one axial end of a housing 1 formed in a cylindrical shape, and a bearing 25 that rotates integrally with the rotor 3 is inserted into the fixed shaft 2. In this type of electric motor,
As disclosed in Japanese Utility Model Application Publication No. 53-9841 shown in FIG. By arranging a pair of bearings 25 to cover both ends of the oil reservoir 26, the bearings 25 are supplied with oil from the oil reservoir 26. However, in this structure, when the rotor 3 rotates, the lubricating oil in the oil reservoir 26 is moved by centrifugal force to the hollow cylinder 2 that covers the outer periphery of the oil reservoir 26.
Since the flow is in the radial direction of oil sump 2
In contrast to 6, lubricating oil may not be supplied to the bearings 25 disposed at both ends of the hollow cylinder 27 in the axial direction. As a result, the bearing 25 tends to run out of oil, shortening the life of the bearing 25, and increasing the friction between the bearing 25 and the fixed shaft 2 as the rotor 3 rotates, causing noise. There's a problem.
［発明の目的］
本発明は上述の点に鑑みて為されたものであつ
て、その主な目的とするところは、軸受けに油切
れが生じないようにして、軸受への寿命を向上さ
せ、かつ騒音が低減された電動機を提供すること
にあり、他の目的とするところは、ハウジング内
の空間を有効に利用して油溜めを設け、デツドス
ペースが生じないようにすることにより、電動機
の小型化に寄与することにあり、さらに他の目的
とするところは、電動機へのフアンの取り付けを
容易にすることにある。[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to prevent the bearing from running out of oil and improve the life of the bearing. Another objective is to provide an electric motor with reduced noise.Another objective is to make the electric motor more compact by effectively utilizing the space inside the housing and providing an oil sump to avoid dead space. Another objective is to facilitate the installation of a fan to an electric motor.
［発明の開示］
以下、本発明の実施例を図面に基づいて説明す
る。本発明に係る電動機は、筒状のハウジング１
の軸方向の一端内周面から軸方向に沿つて固定軸
２が突設され、ロータ３の回転中心に沿つてロー
タ３と一体に設けられた軸受け４が固定軸２の外
周面に沿つて嵌挿される電動機であつて、軸受け
４は焼結合金を用いて一端部に大径部５を有した
筒体に形成され、大径部５内が油溜め６とされた
ことを特徴とするものである。本実施例では誘導
電動機を例示する。[Disclosure of the Invention] Hereinafter, embodiments of the present invention will be described based on the drawings. The electric motor according to the present invention has a cylindrical housing 1
A fixed shaft 2 is provided extending along the axial direction from the inner circumferential surface of one end in the axial direction, and a bearing 4 provided integrally with the rotor 3 along the rotation center of the rotor 3 is provided along the outer circumferential surface of the fixed shaft 2. The electric motor is fitted into an electric motor, and the bearing 4 is formed of a sintered metal into a cylinder having a large diameter part 5 at one end, and the inside of the large diameter part 5 is an oil reservoir 6. It is something. In this embodiment, an induction motor is exemplified.
ハウジング１は、第２図および第３図に示すよ
うに、前端面が開放された略円筒状に形成され、
周壁の前端部に螺入されるねじ１１によつてスタ
ータ１２が保持される。ステータ１２はリンング
状の鉄芯１３にステータコイル１４を巻装して形
成される。ハウジング１の後壁の前面中央部には
取付台１５が突設されており、この取付台１５の
中央部には固定軸２が嵌着され、固定軸２はその
前端部がハウジング１の軸方向に沿つて突出す
る。固定軸２にはロータ３の回転中心に沿つてロ
ータ３に嵌着された軸受け４が嵌挿される。ロー
タ３の前面にはロータエンドリング２３が軸受け
４との間で保持されており、ロータ３と軸受け４
とが確実に固定されるようにしている。軸受け４
は前端部において後端部よりも内外径ともに大き
くなつた大径部５を有する形状に形成され、後端
部の小径部９が固定軸２の外周に沿つて嵌挿され
る。小径部９の軸方向の両端を挾む形で固定軸２
には一対の間座２１が固定され、また、固定軸２
の前端側の間座２１の前面に接して固定軸２には
止め輪２２が固定されており、これにより、固定
軸２からの軸受け４の抜け止めがなされている。
ところで、この軸受け４は焼結合金によつて形成
されており、上記大径部５内にはフエルトに潤滑
油を含浸させた油溜め６が収容されている。した
がつて、油溜め６に含浸された潤滑油は焼結合金
で形成された軸受け４にも含浸されるものであ
り、ロータ３が回転すると、油溜め６に含浸され
た潤滑油は遠心力により油溜め６の外周部に集ま
つて軸受け４の大径部５内に含浸され、軸受へ４
を形成する焼結合金内の空孔を通つて小径部９に
も導かれる。ここで軸受け４と固定軸２との摩擦
により軸受け４の小径部９の温度が上昇すると、
潤滑油に対流を生じ、第４図に矢印で示すよう
に、大径部６から小径部９への潤滑油の供給が促
進される。このようにして潤滑油が軸受け４の内
周面と固定軸２の外周面との間を濡らし、軸受け
４の寿命を向上させるとともに、軸受け４と固定
軸２との間の摩擦により生じる騒音を軽減できる
ものである。ロータ３の回転が停止すれば油溜め
６を形成している基材が潤滑油を回収する。ま
た、軸受け４の外周面は潤滑油が軸受け４の外に
染み出すことがないよう非浸透となる処理が施さ
れている。大径部５の前端面はエンドキヤツプ２
４により閉塞され、油溜め６が露出しないように
している。 As shown in FIGS. 2 and 3, the housing 1 is formed into a substantially cylindrical shape with an open front end surface.
A starter 12 is held by a screw 11 screwed into the front end of the peripheral wall. The stator 12 is formed by winding a stator coil 14 around a ring-shaped iron core 13. A mounting base 15 is protruded from the front center of the rear wall of the housing 1. A fixed shaft 2 is fitted into the center of the mounting base 15, and the front end of the fixed shaft 2 is connected to the shaft of the housing 1. protrude along a direction. A bearing 4 fitted to the rotor 3 is fitted onto the fixed shaft 2 along the rotation center of the rotor 3. A rotor end ring 23 is held between the rotor 3 and the bearing 4 on the front surface of the rotor 3.
and ensure that it is securely fixed. Bearing 4
is formed in a shape having a large diameter portion 5 at the front end that is larger in both inner and outer diameters than the rear end, and a small diameter portion 9 at the rear end is fitted along the outer periphery of the fixed shaft 2. A fixed shaft 2 is mounted between both ends of the small diameter portion 9 in the axial direction.
A pair of spacers 21 are fixed to the fixed shaft 2.
A retaining ring 22 is fixed to the fixed shaft 2 in contact with the front surface of the spacer 21 on the front end side, thereby preventing the bearing 4 from coming off from the fixed shaft 2.
By the way, this bearing 4 is formed of a sintered alloy, and an oil reservoir 6 made of felt impregnated with lubricating oil is accommodated in the large diameter portion 5. Therefore, the lubricating oil impregnated in the oil sump 6 is also impregnated into the bearing 4 formed of a sintered alloy, and when the rotor 3 rotates, the lubricating oil impregnated in the oil sump 6 is subjected to centrifugal force. The oil collects on the outer periphery of the oil reservoir 6 and is impregnated into the large diameter portion 5 of the bearing 4, and flows into the bearing 4.
It is also guided to the small diameter portion 9 through the pores in the sintered alloy forming the sintered alloy. Here, when the temperature of the small diameter portion 9 of the bearing 4 increases due to friction between the bearing 4 and the fixed shaft 2,
Convection is generated in the lubricating oil, and the supply of lubricating oil from the large diameter portion 6 to the small diameter portion 9 is promoted as shown by the arrow in FIG. In this way, the lubricating oil wets the space between the inner peripheral surface of the bearing 4 and the outer peripheral surface of the fixed shaft 2, improving the life of the bearing 4 and reducing noise caused by friction between the bearing 4 and the fixed shaft 2. This can be reduced. When the rotor 3 stops rotating, the base material forming the oil reservoir 6 collects the lubricating oil. Further, the outer circumferential surface of the bearing 4 is treated to be non-permeable so that lubricating oil does not seep out of the bearing 4. The front end surface of the large diameter portion 5 is the end cap 2.
4 to prevent the oil reservoir 6 from being exposed.
上記ロータ３は円柱状に形成され、その前端面
にはフアン取付用のボス７が３本突設されてい
る。上記大径部５はこれらのボス７に囲まれる部
分に位置しており、ロータ３の前面からの突出量
は大径部５がボス７に比べて若干大きくなつてい
る。 The rotor 3 is formed in a cylindrical shape, and three bosses 7 for attaching the fan are protruded from the front end surface thereof. The large diameter portion 5 is located in a portion surrounded by these bosses 7, and the amount of protrusion from the front surface of the rotor 3 is slightly larger for the large diameter portion 5 than for the bosses 7.
各ボス７にはボス孔１６が設けられ、ハウジン
グ１の前方に配設されてフアン８の翼部１７を保
持する基台１８の前面からボス孔１６に取付ビス
１９が螺入されることにより、フアン８がロータ
３に固定される。このように、フアン８の基台１
８がボス７の前端に当接する形でロータ３に結合
されることによつてボス７間に形成される空間に
軸受へ４の大径部５が位置し、その大径部５内に
油溜め６が収容されるので、ボス７間の空間がデ
ツドスペースとならず、スペースが有効利用さ
れ、その結果、フアン８を取り付けた状態での電
動機全体の小型化が図れるものである。フアン８
の基台１８の中央部には取付孔２０が開口してお
り、上記軸受け４の大径部５の前端部がこの取付
孔２０内に嵌合する。軸受け４は型によつて成型
されており偏心が少なく、また大径部５では外周
径が大きいものであるから、この軸受け４にフア
ン８の取付孔２０が嵌合することにより、フアン
８の芯出しが容易にできるものである。 Each boss 7 is provided with a boss hole 16, and a mounting screw 19 is screwed into the boss hole 16 from the front surface of a base 18 that is disposed at the front of the housing 1 and holds the wing section 17 of the fan 8. , a fan 8 is fixed to the rotor 3. In this way, base 1 of fan 8
The large diameter part 5 of the bearing 4 is located in the space formed between the bosses 7 by the boss 7 being coupled to the rotor 3 in such a manner that the part 8 is in contact with the front end of the boss 7. Since the reservoir 6 is accommodated, the space between the bosses 7 does not become a dead space, and the space is effectively utilized. As a result, the entire motor with the fan 8 attached can be made smaller. fan 8
A mounting hole 20 is opened in the center of the base 18, and the front end of the large diameter portion 5 of the bearing 4 fits into the mounting hole 20. Since the bearing 4 is molded with a mold and has little eccentricity, and the large diameter portion 5 has a large outer diameter, the mounting hole 20 of the fan 8 fits into the bearing 4, so that the fan 8 Centering can be done easily.
［発明の効果］
本発明は上述のように、軸受けが焼結合金を用
いて一端部に大径部を有した筒体に形成され、大
径部内が油溜めとされているので、油溜め内の潤
滑油が焼結合金である軸受けを通して固定軸の表
に供給されることになり、軸受けに油切れが生じ
ることなく、軸受けの寿命が向上するとともに、
騒音が低減されるという利点を有するものであ
る。また、ロータの軸方向の一端面にフアン取付
用の複数のボスが突設され、これらのボスに囲ま
れる部分に軸受けの大径部が位置するものにあつ
ては、ボスに囲まれた部分がデツドスペースとな
らず、ハウジング内の空間が有効に利用されると
いう利点を有する。その結果、電動機の小型化に
寄与することができる。さらに、ロータにフアン
取付用のボスが突設されるとともに、大径部が円
筒状に形成され、大径部の外周面にロータのボス
に固定されたフアンの中心部が嵌合するものにお
いては、フアンの芯出しを軸受けの大径部にフア
ンを嵌合させることによつて行ない、ロータとフ
アンとの結合をフアンをボスに固定することによ
つて行なうものであるから、電動機へのフアンの
取り付け作業が容易になるものである。[Effects of the Invention] As described above, in the present invention, the bearing is formed of a cylindrical body using a sintered alloy and has a large diameter portion at one end, and the inside of the large diameter portion serves as an oil sump. The lubricating oil inside is supplied to the surface of the fixed shaft through the sintered alloy bearing, which prevents the bearing from running out of oil and extends the life of the bearing.
This has the advantage that noise is reduced. In addition, in the case where multiple bosses for mounting a fan are protruded from one end surface in the axial direction of the rotor, and the large diameter part of the bearing is located in the area surrounded by these bosses, the area surrounded by the bosses. This has the advantage that the housing does not become a dead space and the space within the housing is effectively utilized. As a result, it is possible to contribute to miniaturization of electric motors. Furthermore, the rotor is provided with a protruding boss for attaching the fan, and the large diameter part is formed in a cylindrical shape, and the center part of the fan fixed to the boss of the rotor fits into the outer peripheral surface of the large diameter part. In this method, the centering of the fan is performed by fitting the fan into the large diameter part of the bearing, and the rotor and fan are connected by fixing the fan to the boss. This simplifies the work of installing the fan.
第１図は従来例を示す縦断面図、第２図は本発
明の一実施例を示す第３図中Ｘ―Ｘ線断面に相当
する縦断面図、第３図は同上のフアンを外した状
態の正面図、第４図は同上の動作を説明する概略
部分断面図である。
１はハウジング、２は固定軸、３はロータ、４
は軸受け、５は大径部、６は油溜め、７はボス、
８はフアンである。
Fig. 1 is a longitudinal cross-sectional view showing a conventional example, Fig. 2 is a longitudinal cross-sectional view corresponding to the X-X line cross section in Fig. 3 showing an embodiment of the present invention, and Fig. 3 is a longitudinal cross-sectional view showing an embodiment of the present invention, with the same fan removed. FIG. 4 is a front view of the state and a schematic partial sectional view illustrating the operation of the same. 1 is a housing, 2 is a fixed shaft, 3 is a rotor, 4
is the bearing, 5 is the large diameter part, 6 is the oil reservoir, 7 is the boss,
8 is Juan.
Claims (1)
軸方向に沿つて固定軸が突設され、ロータの回転
中心に沿つてロータと一体に設けられた軸受けが
固定軸の外周面に沿つて嵌挿される電動機であつ
て、軸受けは焼結合金を用いて一端部に大径部を
有した筒体に形成され、大径部内が油溜めとされ
たことを特徴とする電動機。 ２ 上記ロータの軸方向の一端面にフアン取付用
の複数のボスが突設され、これらのボスに囲まれ
る部分に上記大径部が位置することを特徴とする
特許請求の範囲第１項記載の電動機。 ３ 上記大径部が円筒状に形成され、大径部の外
周面にロータのボスに固定されたフアンの中心部
が嵌合することを特徴とする特許請求の範囲第２
項記載の電動機。[Claims] 1. A fixed shaft is provided axially protruding from the inner peripheral surface of one end of the cylindrical housing in the axial direction, and a bearing provided integrally with the rotor along the rotation center of the rotor is attached to the fixed shaft. The electric motor is fitted along the outer peripheral surface of the motor, and the bearing is formed of a sintered metal into a cylinder having a large diameter part at one end, and the inside of the large diameter part is an oil reservoir. electric motor. 2. Claim 1, characterized in that a plurality of bosses for mounting a fan are protruded from one end surface in the axial direction of the rotor, and the large diameter portion is located in a portion surrounded by these bosses. electric motor. 3. Claim 2, wherein the large diameter portion is formed in a cylindrical shape, and a center portion of a fan fixed to a boss of the rotor fits into the outer peripheral surface of the large diameter portion.
Electric motor described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24962783A JPS60134741A (en) | 1983-12-23 | 1983-12-23 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24962783A JPS60134741A (en) | 1983-12-23 | 1983-12-23 | Motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60134741A JPS60134741A (en) | 1985-07-18 |
| JPH023389B2 true JPH023389B2 (en) | 1990-01-23 |
Family
ID=17195837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24962783A Granted JPS60134741A (en) | 1983-12-23 | 1983-12-23 | Motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60134741A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0432891U (en) * | 1990-07-09 | 1992-03-17 |
-
1983
- 1983-12-23 JP JP24962783A patent/JPS60134741A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0432891U (en) * | 1990-07-09 | 1992-03-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60134741A (en) | 1985-07-18 |
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