JP3181760B2 - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JP3181760B2 JP3181760B2 JP18724893A JP18724893A JP3181760B2 JP 3181760 B2 JP3181760 B2 JP 3181760B2 JP 18724893 A JP18724893 A JP 18724893A JP 18724893 A JP18724893 A JP 18724893A JP 3181760 B2 JP3181760 B2 JP 3181760B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- cylindrical portion
- cap
- bearing
- housing
- 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 - Fee Related
Links
Landscapes
- Brushless Motors (AREA)
- Motor Or Generator Frames (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はブラシレスモータに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor.
【０００２】[0002]
【従来の技術】ハウジングの円筒部に回転自在に挿入さ
れる軸を備えたブラシレスモータでは、該軸は、円筒部
に内嵌される玉軸受を介して回転自在に枢支される。2. Description of the Related Art In a brushless motor having a shaft rotatably inserted into a cylindrical portion of a housing, the shaft is rotatably supported via a ball bearing internally fitted in the cylindrical portion.
【０００３】ところが、最近では、高価な玉軸受に代え
て円筒状スリーブ軸受（すべり軸受）により軸を回転支
持するようにしたものがあり、安価でしかも構造簡単な
モータが提供されている。[0003] However, recently, there has been a type in which a shaft is rotatably supported by a cylindrical sleeve bearing (slide bearing) instead of an expensive ball bearing, and an inexpensive and simple motor is provided.
【０００４】スリーブ軸受を使用したものでは、反転状
態（ハウジングの円筒部の先端開口部が下方とされる状
態）で使用された場合、スリーブ軸受に含浸された油が
滴下するので、円筒部に、該油を受けるためのキャップ
を付設する場合があった。When the sleeve bearing is used in an inverted state (a state in which the opening at the tip of the cylindrical portion of the housing is set downward), oil impregnated in the sleeve bearing is dripped. In some cases, a cap for receiving the oil is provided.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、油の滴
下量が多くなれば、キャップの油の容量を越え、このキ
ャップから漏れる虞れがあった。However, if the amount of oil dripping increases, the oil capacity of the cap may be exceeded and the oil may leak from the cap.
【０００６】そこで、本発明では、構造が簡単となるす
べり軸受を使用することができ、かつ、該すべり軸受に
含浸された油が外部へ流出することのないブラシレスモ
ータを提供することを目的とする。Accordingly, an object of the present invention is to provide a brushless motor that can use a sliding bearing having a simple structure and that does not allow oil impregnated in the sliding bearing to flow outside. I do.
【０００７】[0007]
【課題を解決するための手段】上述の目的を達成するた
めに、本発明に係るブラシレスモータは、ハウジングの
円筒部に内嵌された中空円筒状のすべり軸受に回転自在
に挿通される軸を備えたブラシレスモータであって、上
記円筒部の先端開口部に、すべり軸受側に開口する油受
け用凹周溝を有するキャップを設け、かつ、該すべり軸
受を油が含浸された多孔質材とすると共に、該すべり軸
受の先端部の半径方向外側部に、軸方向外側に延伸され
る延伸部を設け、上記凹周溝と該延伸部とが相互に非接
触状態で嵌まり合うものである。In order to achieve the above object, a brushless motor according to the present invention has a shaft rotatably inserted into a hollow cylindrical slide bearing fitted inside a cylindrical portion of a housing. A brushless motor provided with a cap having an oil-receiving concave peripheral groove opening on the slide bearing side at the tip end opening of the cylindrical portion, and a porous material impregnated with oil on the slide bearing. And at the radially outer portion of the tip of the plain bearing , extends axially outward.
The concave peripheral groove and the extended portion are not in contact with each other.
It fits in the state of touch .
【０００８】[0008]
【作用】ハウジングの円筒部の先端開口部が下方となる
状態にて使用された場合、すべり軸受に含浸された油
は、すべり軸受の先端部が侵入している凹周溝内に滴下
し、この凹周溝にて受けられる。When used in a state where the opening at the tip of the cylindrical portion of the housing is downward, the oil impregnated in the sliding bearing drops into the concave circumferential groove into which the tip of the sliding bearing has penetrated. It is received in this concave circumferential groove.
【０００９】そして、滴下量が多くなって凹周溝内に多
量の油が溜まれば、すべり軸受の先端部が凹周溝に侵入
しているので、該先端部がこの油内に浸漬し、毛細管現
象により、凹周溝内の油は再びすべり軸受に吸収され
る。If the amount of dripping increases and a large amount of oil accumulates in the concave circumferential groove, the leading end of the slide bearing has penetrated into the concave circumferential groove. Due to the capillary phenomenon, the oil in the concave circumferential groove is again absorbed by the slide bearing.
【００１０】[0010]
【実施例】以下、実施例を示す図面に基づいて本発明を
詳説する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.
【００１１】図１は本発明に係るブラシレスモータを使
用したファン装置を示し、このファン装置は、中央部に
軸受用の円筒部１を有するハウジング２と、該ハウジン
グ２の円筒部１にすべり軸受３を介して回転自在に挿通
される軸４と、該軸４の一端部が挿入固定されるロータ
５と、円筒部１に外嵌固定されるステータ６と、ロータ
５の内周面にヨーク７を介して固着されるロータマグネ
ット８と、を備える。FIG. 1 shows a fan device using a brushless motor according to the present invention. This fan device has a housing 2 having a cylindrical portion 1 for bearing at the center and a sliding bearing on the cylindrical portion 1 of the housing 2. A shaft 4 rotatably inserted through the shaft 3, a rotor 5 into which one end of the shaft 4 is inserted and fixed, a stator 6 fitted and fixed to the cylindrical portion 1 outside, and a yoke on the inner peripheral surface of the rotor 5 And a rotor magnet 8 fixed through the rotor 7.
【００１２】ハウジング２の円筒部１は、一方開口状で
他端が底壁部10にて閉じた有底円筒形状とされる。The cylindrical portion 1 of the housing 2 has a bottomed cylindrical shape with one opening and the other end closed by a bottom wall portion 10.
【００１３】また、すべり軸受３は、外径側に配設され
るスリーブ軸受11と、内径側に配設される短円筒体のメ
タル軸受12，12と、からなる。スリーブ軸受11及びメタ
ル軸受12ともに油が含浸された多孔質材である焼結金属
等からなる。なお、スリーブ軸受11を油の含油量を重視
して油含油量を多くし、メタル軸受12を耐摩耗性を重視
して油含油量を少なくするのが好ましい。The sliding bearing 3 comprises a sleeve bearing 11 disposed on the outer diameter side, and short cylindrical metal bearings 12 disposed on the inner diameter side. Both the sleeve bearing 11 and the metal bearing 12 are made of a sintered metal or the like which is a porous material impregnated with oil. It is preferable to increase the oil content of the sleeve bearing 11 with emphasis on the oil content, and reduce the oil content of the metal bearing 12 with emphasis on wear resistance.
【００１４】そして、底壁部10には、軸４を受けるスラ
スト受部材13が設けられる。このスラスト受部材13は、
例えば、ＰＰＳ系樹脂複合材からなり、底壁部10の内面
に設けられた凹窪部14に嵌合される。なお、軸４の端面
15は球面加工される。The bottom wall 10 is provided with a thrust receiving member 13 for receiving the shaft 4. This thrust receiving member 13
For example, it is made of a PPS-based resin composite material, and is fitted into the concave portion 14 provided on the inner surface of the bottom wall portion 10. The end face of the shaft 4
15 is spherical processed.
【００１５】従って、軸４は、スラスト受部材13とすべ
り軸受３にて安定した状態で円滑にその軸心廻りに回転
することができる。Therefore, the shaft 4 can be smoothly rotated around its axis in a stable state by the thrust receiving member 13 and the slide bearing 3.
【００１６】また、凹窪部14の外周縁には、図３と図４
に示すように、周方向に沿って立上り壁16…が立設さ
れ、この立上り壁16の外径側に平面視円弧状の溝17…が
形成され、この溝17には径方向溝18が連設される。The outer peripheral edge of the concave portion 14 is shown in FIGS.
As shown in the figure, rising walls 16 are erected along the circumferential direction, and circular grooves 17 are formed on the outer diameter side of the rising walls 16 in plan view, and radial grooves 18 are formed in the grooves 17. It is installed continuously.
【００１７】凹窪部14の内周面には、立上り壁16の先端
に達する突部19…が設けられ、これにより、凹窪部14に
嵌合されるスラスト受部材13が密嵌状となる。20は凹窪
部14の底面に設けられた凹所である。The inner peripheral surface of the concave portion 14 is provided with protrusions 19 reaching the tip of the rising wall 16, whereby the thrust receiving member 13 fitted in the concave portion 14 is tightly fitted. Become. Reference numeral 20 denotes a recess provided on the bottom surface of the recess 14.
【００１８】ところで、スラスト受部材13を、取外す場
合、図７に示す治具21を使用する。治具21は、柄部22と
先端部23とからなる一対の第１・第２部材24ａ，24ｂ
と、第１・第２部材24ａ，24ｂを揺動自在に枢支する枢
支軸26と、を備え、第１・第２部材24ａ，24ｂの柄部2
2，22を接近させれば、先端部23，23が接近し、柄部2
2，22を離間させれば、先端部23，23が離間する。When removing the thrust receiving member 13, a jig 21 shown in FIG. 7 is used. The jig 21 includes a pair of first and second members 24a and 24b each including a handle 22 and a tip 23.
And a pivot 26 for pivotally supporting the first and second members 24a and 24b. The handle 2 of the first and second members 24a and 24b is provided.
2 and 22, the tips 23 and 23 approach, and the handle 2
If the parts 2 and 22 are separated from each other, the tips 23 and 23 are separated from each other.
【００１９】また、第１部材24ａの先端部23の内面先端
に、三角形の突部25が設けられ、第２部材24ｂの先端部
23の内面先端に、円弧状の突部27が設けられる。なお、
第１部材24ａの先端部23の幅寸法が隣合う立上り壁16，
16間の隙間より小さい場合には、この突部25を断面三角
形状の幅方向突条から構成してもよい。Further, a triangular projection 25 is provided at the inner end of the tip 23 of the first member 24a, and the tip of the second member 24b.
An arc-shaped protruding portion 27 is provided at the tip of the inner surface of 23. In addition,
The rising wall 16, in which the width dimension of the tip portion 23 of the first member 24a is adjacent,
When the gap is smaller than the gap between the protrusions 16, the protrusion 25 may be formed of a width-direction protrusion having a triangular cross section.
【００２０】従って、図６と図８に示すように、スラス
ト受部材13を治具21にて挾持すれば、該スラスト受部材
13を凹窪部14から取出すことができる。Therefore, as shown in FIGS. 6 and 8, when the thrust receiving member 13 is clamped by the jig 21, the thrust receiving member
13 can be removed from the recess 14.
【００２１】また、ハウジング２の円筒部１の内周面29
には、図３と図４に示すように、突条部28…が周方向に
所定ピッチ（具体的には、 120°ピッチ）に配設され、
これにより、すべり軸受３ががたつくことなく、円筒部
１に内嵌される。さらに、円筒部１の外径側には、突条
部28に対応して逃げ孔30…が貫設される。The inner peripheral surface 29 of the cylindrical portion 1 of the housing 2
3 and 4, the ridges 28 are arranged at a predetermined pitch in the circumferential direction (specifically, at a pitch of 120 °).
Thereby, the sliding bearing 3 is fitted in the cylindrical portion 1 without rattling. Further, on the outer diameter side of the cylindrical portion 1, escape holes 30.
【００２２】しかして、円筒部１の先端開口部１ａに
は、油受け用凹周溝31を有するキャップ32が設けられ
る。キャップ32は、図２に示すように、円筒部１に内嵌
される内筒部33と、円筒部１に外嵌される外筒部34と、
内外筒部33，34を連結する連結壁35と、内筒部33から内
径方向へ突出する突出壁部36と、からなる。突出壁部36
はその内径端部がすべり軸受３側へ弯曲し、上記凹周溝
31を形成する。Thus, a cap 32 having an oil receiving concave peripheral groove 31 is provided in the distal end opening 1a of the cylindrical portion 1. As shown in FIG. 2, the cap 32 includes an inner cylindrical portion 33 fitted inside the cylindrical portion 1, an outer cylindrical portion 34 fitted outside the cylindrical portion 1,
It comprises a connecting wall 35 connecting the inner and outer cylindrical portions 33 and 34, and a projecting wall portion 36 projecting from the inner cylindrical portion 33 in the inner diameter direction. Projecting wall 36
Is bent toward the slide bearing 3 at the inner diameter end, and
Form 31.
【００２３】また、外筒部34の開口端部内面には、係止
用の突条37が設けられ、円筒部１の先端部外周面は、溝
38が形成され、図１と図２に示すように、円筒部１の先
端部を、内外筒部33，34にて形成される凹周溝32ａに挿
入すれば、突条37が溝38に係止し、キャップ32は円筒部
１に装着される。A locking ridge 37 is provided on the inner surface of the open end of the outer cylindrical portion 34, and the outer peripheral surface of the distal end portion of the cylindrical portion 1 has a groove.
1 and 2, when the tip of the cylindrical portion 1 is inserted into the concave peripheral groove 32a formed by the inner and outer cylindrical portions 33 and 34, the ridge 37 is formed in the groove 38. The cap 32 is locked, and the cap 32 is attached to the cylindrical portion 1.
【００２４】しかして、スリーブ軸受11は、先端部の内
周面に切欠き凹周溝39が形成され、延伸部40が形成さ
れ、この延伸部40の先端部、つまり、すべり軸受３の先
端部３ａが、油受け用凹周溝31に侵入する。Thus, the sleeve bearing 11 has a notched concave peripheral groove 39 formed on the inner peripheral surface of the distal end portion, and an extended portion 40 is formed, and the distal end portion of the extended portion 40, that is, the distal end of the sliding bearing 3 is formed. The portion 3a enters the oil receiving concave peripheral groove 31.
【００２５】また，軸４を固定するハウジング２のボス
部42は、大径部42ａと中径部42ｂと小径部42ｃと、を備
え、中径部42ｂの一部がキャップ32に遊嵌状に侵入し、
小径部42ｃの外周面は、キャップ32の突出壁部36に沿っ
て弯曲している。なお、小径部42ｃの端部には、外鍔部
42ｄが形成され、この外鍔部42ｄの外周に一対の係止突
部が膨出形成されている。The boss 42 of the housing 2 for fixing the shaft 4 has a large diameter portion 42a, a medium diameter portion 42b, and a small diameter portion 42c, and a part of the medium diameter portion 42b is loosely fitted to the cap 32. Invading,
The outer peripheral surface of the small diameter portion 42c is curved along the protruding wall portion 36 of the cap 32. In addition, an outer flange portion is provided at an end of the small diameter portion 42c.
42d is formed, and a pair of locking projections are formed to bulge around the outer periphery of the outer flange 42d.
【００２６】この場合、キャップ32の内筒部33の内周面
と中径部42ｂの外周面との間、乃至キャップ32の突出壁
部36の外面と小径部42ｃの外周面との間には、隙間が形
成される。さらに、外鍔部42ｄの外径寸法Ｄ1 を、キャ
ップ32の突出壁部36の内径寸法Ｄ2 より僅かに大きくし
ている。これは、図２に示すように、ボス部42が下方と
なるように配置された場合において、ボス部42の外鍔部
42ｄに付着した油がその外周縁から滴下した際に、油受
け用凹周溝31にて確実に受けることができるようにする
ためである。In this case, between the inner peripheral surface of the inner cylindrical portion 33 of the cap 32 and the outer peripheral surface of the middle diameter portion 42b, or between the outer surface of the projecting wall portion 36 of the cap 32 and the outer peripheral surface of the small diameter portion 42c. A gap is formed. Further, the outer diameter D 1 of the 42d outer flange portion is slightly larger than the inner diameter D 2 of the protruding wall portion 36 of the cap 32. This is because, as shown in FIG. 2, when the boss portion 42 is arranged so as to face down, the outer flange portion of the boss portion 42
This is because when the oil adhering to 42d is dropped from the outer peripheral edge, it can be reliably received in the oil receiving concave peripheral groove 31.
【００２７】従って、上述の如く構成されたキャップ32
を円筒部１に装着すれば、図２に示すように、反転され
た状態でこのブラシレスモータが使用された場合、すべ
り軸受３の油が滴下した際、凹周溝31にて該油を受ける
ことができる。Therefore, the cap 32 constructed as described above is used.
When the brushless motor is used in an inverted state, as shown in FIG. 2, when the oil of the slide bearing 3 is dripped, the oil is received in the concave circumferential groove 31 as shown in FIG. be able to.
【００２８】そして、滴下量が多くなって、凹周溝31に
多くの油が溜まったとしても、すべり軸受３の先端部３
ａが凹周溝31内に侵入しているので、該先端部３ａが油
内に浸漬されることになり、浸漬されれば、毛細管現象
にて、油はスリーブ軸受３に吸収される。即ち、このよ
うに、反転状態にて使用されたとしても、油は円筒部１
の外部へ飛散しない。Even if the amount of dripping increases and a large amount of oil accumulates in the concave circumferential groove 31, the leading end 3 of the sliding bearing 3
Since a has penetrated into the concave circumferential groove 31, the tip portion 3a is immersed in the oil. If immersed, the oil is absorbed by the sleeve bearing 3 by capillary action. That is, even if the oil is used in the inverted state, the oil is not
Do not fly outside.
【００２９】しかして、ボス部42の小径部42ｃには、断
面山形状の油案内部43が形成されている。即ち、図５に
示すように、このブラシレスモータが横倒された場合
に、突出壁部36を伝って、ボス部42に油が滴下された際
に、ロータ５の回転により、この油案内部43の傾斜面に
沿って油が矢印の如く飛散してスリーブ軸受11に吸収さ
れるようにしている。The small-diameter portion 42c of the boss portion 42 has an oil guide portion 43 having a mountain-shaped cross section. That is, as shown in FIG. 5, when the brushless motor is laid down and the oil drops on the boss portion 42 along the projecting wall portion 36, the rotation of the rotor 5 causes the oil guide portion to rotate. The oil scatters along the inclined surface 43 as shown by the arrow and is absorbed by the sleeve bearing 11.
【００３０】ところで、キャップ32は、ポリアミド系樹
脂（炭素数６のε−カプロラクタムの開環重合によって
得られるポリアミド（ナイロン６）、ヘキサメチレンジ
アミンとアジピン酸の重縮合によって合成されるナイロ
ン66）にて形成され、ハウジング２は、ＰＢＴ（ポリブ
チレンテレフタレート）にて形成される。The cap 32 is made of a polyamide resin (polyamide (nylon 6) obtained by ring-opening polymerization of ε-caprolactam having 6 carbon atoms, nylon 66 synthesized by polycondensation of hexamethylenediamine and adipic acid). The housing 2 is formed of PBT (polybutylene terephthalate).
【００３１】即ち、キャップ32の線膨張係数を、8.1 ×
10-5とし、ハウジング２の線膨張係数を３×10-5とし、
これにより、常温でのキャップ32の最大締め代Ａ（図２
参照）を0.09mm位とし、 120℃の高温状態で締め代Ａを
0.13mm位となるように設定し、高温になるほど圧入力を
大としてシール効果を高めている。That is, the linear expansion coefficient of the cap 32 is set to 8.1 ×
10 -5 , the coefficient of linear expansion of the housing 2 is 3 × 10 -5 ,
Thereby, the maximum interference A of the cap 32 at normal temperature (FIG. 2)
) To about 0.09mm, and tightening margin A at a high temperature of 120 ° C
It is set to be about 0.13mm, and the higher the temperature, the greater the pressure input and the higher the sealing effect.
【００３２】逆に、低温になれば、上記締め代Ａは小と
なって、圧入部分が緩くなるが、温度低下にともなって
油の粘度も大きくなり、かつ、体積も小となって、油の
流出を抑えることができる。Conversely, when the temperature becomes low, the interference A becomes small and the press-fit portion becomes loose, but the oil viscosity becomes large and the volume becomes small as the temperature decreases, and the oil becomes small. Outflow can be suppressed.
【００３３】次に、ステータ６は、図１に示すように、
複数枚の薄板状コアが積層されてなるステータコア44
と、該コア44に装着されるインシュレータ45，46と、イ
ンシュレータ45，46が装着された状態のコア44に巻設さ
れるコイル47とからなる。Next, as shown in FIG.
Stator core 44 formed by laminating a plurality of thin plate cores
And insulators 45 and 46 attached to the core 44, and a coil 47 wound around the core 44 with the insulators 45 and 46 attached.
【００３４】即ち、一方のインシュレータ45には、その
筒部45ａ内周面に弾性係止片部48が設けられ、この係止
片部48が、円筒部１の外周面に設けられた係止突部49，
49に係止し、このステータ６は円筒部１に固定される。That is, one of the insulators 45 is provided with an elastic locking piece 48 on the inner peripheral surface of the cylindrical portion 45 a, and the locking piece 48 is provided on the outer peripheral surface of the cylindrical portion 1. Protrusion 49,
49, and the stator 6 is fixed to the cylindrical portion 1.
【００３５】なお、他方のインシュレータ46には垂下片
50が設けられ、この垂下片50から、コイル47が接続され
た端子51が突設され、この端子51がハウジング２に固定
される回路基板52に接続される。The other insulator 46 has a hanging piece.
A terminal 51 to which the coil 47 is connected protrudes from the hanging piece 50, and the terminal 51 is connected to a circuit board 52 fixed to the housing 2.
【００３６】そして、ステータ６の磁気センターとロー
タマグネット８の磁気センターとを軸方向に所定寸法だ
けずらせ、ロータ５が矢印Ｂ方向への力を受けるように
して、軸４の端面15を常にスラスト受部材13に当接させ
るようにする。Then, the magnetic center of the stator 6 and the magnetic center of the rotor magnet 8 are displaced in the axial direction by a predetermined dimension, so that the rotor 5 receives a force in the direction of arrow B, and the end face 15 of the shaft 4 is always thrust. The receiving member 13 is brought into contact with the receiving member 13.
【００３７】この場合、ステータコア44とロータマグネ
ット８との相対的な位置関係により、ロータ５の回転時
に軸４がスラスト受部材13を介してハウジング２に振動
力を与えるが、実施例においては、ハウジング２の軸対
応位置及びその周辺部には、凹凸部及び逃げ孔30が設け
られ、これにより、振動を減衰させている。In this case, the shaft 4 applies a vibration force to the housing 2 via the thrust receiving member 13 when the rotor 5 rotates, due to the relative positional relationship between the stator core 44 and the rotor magnet 8, but in the embodiment, An uneven portion and a relief hole 30 are provided at a position corresponding to the axis of the housing 2 and its peripheral portion, thereby damping vibration.
【００３８】また、ハウジング２の円筒部１の外周面に
は、図３と図４に示すように、突条53が設けられ、この
突条53がステータ６のステータコア44の内周面に設けら
れた合マーク用の凹所に嵌合する。As shown in FIGS. 3 and 4, a ridge 53 is provided on the outer peripheral surface of the cylindrical portion 1 of the housing 2, and the ridge 53 is provided on the inner peripheral surface of the stator core 44 of the stator 6. Into the recess for the matching mark.
【００３９】具体的には、イとロの逃げ孔30，30間に、
突条53を形成し、ステータコア44に合マーク用の凹所を
180°毎に設ける。More specifically, between the escape holes 30,
A ridge 53 is formed, and a recess for a matching mark is formed in the stator core 44.
Provide every 180 °.
【００４０】従って、突条53に対向するハの逃げ孔30か
ら、突条53に嵌合していない合マーク用凹所に、キャッ
プ32を取外すための治具を挿入し、この治具にてキャッ
プ32の係合を解除すれば、ロータ５をキャップ32ととも
に取外すことができる。Accordingly, a jig for removing the cap 32 is inserted from the escape hole 30 of the c facing the ridge 53 into the matching mark recess not fitted with the ridge 53, and the jig is inserted into this jig. When the cap 32 is disengaged from the rotor 32, the rotor 5 can be removed together with the cap 32.
【００４１】なお、ロータ５は、碗形とされ、外周面に
複数の羽根54…が突設される。The rotor 5 is bowl-shaped, and has a plurality of blades 54 projecting from the outer peripheral surface.
【００４２】次に、図９は他の実施例を示し、この場
合、ステータ６の一方のインシュレータ45とキャップ32
とを一体化している。FIG. 9 shows another embodiment. In this case, one insulator 45 of the stator 6 and the cap 32 are provided.
And are integrated.
【００４３】即ち、インシュレータ45は、図10と図11に
示すように、ステータコア44に当接する当接壁55と、該
当接壁55から垂下される垂下壁56と、当接壁55から立設
される円筒部57と、を備え、該円筒部57にキャップ32が
連設される。That is, as shown in FIGS. 10 and 11, the insulator 45 is provided upright from the contact wall 55 contacting the stator core 44, the hanging wall 56 hanging down from the contact wall 55, and the contact wall 55. And the cap 32 is connected to the cylindrical portion 57.
【００４４】この場合のキャップ32は、上述のキャップ
32と同様、内筒部33と外筒部34と連結壁35と突出壁部36
とからなる。In this case, the cap 32 is
32, the inner cylinder 33, the outer cylinder 34, the connecting wall 35, and the protruding wall 36
Consists of
【００４５】従って、外筒部34の内周面には突条37が設
けられず、ハウジング２の円筒部１には突条37が係止す
る溝が形成されない。Accordingly, no ridge 37 is provided on the inner peripheral surface of the outer cylindrical portion 34, and no groove is formed in the cylindrical portion 1 of the housing 2 for engaging the ridge 37.
【００４６】即ち、円筒部１の先端部をキャップ32の凹
周溝32ａに嵌合させて円筒部57の内面に形成される弾性
係止片部48を、円筒部１の外周面の係止突部49に係止さ
せれば、キャップ32が装着される。That is, by fitting the distal end of the cylindrical portion 1 into the concave circumferential groove 32a of the cap 32, the elastic locking piece 48 formed on the inner surface of the cylindrical portion 57 is locked to the outer circumferential surface of the cylindrical portion 1. The cap 32 is mounted by locking the projection 32 to the projection 49.
【００４７】従って、この実施例によれば、ハウジング
２の円筒部１の形状を簡素化することができる。Therefore, according to this embodiment, the shape of the cylindrical portion 1 of the housing 2 can be simplified.
【００４８】なお、本発明は上述の実施例に限定され
ず、本発明の要旨を逸脱しない範囲で設計変更自由であ
り、例えば、キャップ32がハウジング２の円筒部１と一
体化されているものであってもよい。この場合、円筒部
１の底壁部10を省略して円筒部１を基端開口状とし、こ
の基端開口部に、スラスト受部材13を有する基端用のキ
ャップを装着するようにすればよい。It should be noted that the present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the gist of the present invention. For example, the cap 32 is integrated with the cylindrical portion 1 of the housing 2. It may be. In this case, the bottom wall portion 10 of the cylindrical portion 1 may be omitted so that the cylindrical portion 1 has a base opening shape, and a cap for the base end having the thrust receiving member 13 may be attached to the base opening portion. Good.
【００４９】[0049]
【発明の効果】本発明は上述の如く構成されているの
で、次に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００５０】 構造が簡単となるすべり軸受３を使用
することができ、コストの低減を図ると共に、円滑に回
転することができるブラシレスモータを提供することが
できる。A sliding bearing 3 having a simple structure can be used, and a brushless motor that can reduce the cost and can rotate smoothly can be provided.
【００５１】 反転状態（ハウジング２の円筒部１の
先端開口部１ａが下方となる状態）にて使用されても、
すべり軸受３の油をキャップ32の凹周溝31にて受けるこ
とができ、しかも、油の滴下量が多くなって油の溜る量
が増大したとしても、この凹周溝31内の油は再びすべり
軸受３の先端部３ａを介して該すべり軸受３に吸収され
るので、油の円筒部１外への流出を有効に防止すること
ができる。Even when used in an inverted state (a state where the distal end opening 1a of the cylindrical portion 1 of the housing 2 is downward),
The oil in the sliding bearing 3 can be received in the concave peripheral groove 31 of the cap 32, and even if the amount of oil dripping increases and the amount of accumulated oil increases, the oil in the concave peripheral groove 31 is reapplied. Since the oil is absorbed by the slide bearing 3 through the tip 3a of the slide bearing 3, it is possible to effectively prevent oil from flowing out of the cylindrical portion 1.
【図１】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of the present invention.
【図２】反転状態の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part in an inverted state.
【図３】要部断面平面図である。FIG. 3 is a sectional plan view of a main part.
【図４】ハウジングの断面正面図である。FIG. 4 is a sectional front view of a housing.
【図５】横倒状態の要部拡大断面図である。FIG. 5 is an enlarged sectional view of a main part in a sideways state.
【図６】要部拡大断面図である。FIG. 6 is an enlarged sectional view of a main part.
【図７】スラスト受部材取外し用治具を示す斜視図であ
る。FIG. 7 is a perspective view showing a jig for removing a thrust receiving member.
【図８】スラスト受部材取外し状態を示す説明図であ
る。FIG. 8 is an explanatory view showing a state where a thrust receiving member is removed.
【図９】他の実施例を示す断面図である。FIG. 9 is a sectional view showing another embodiment.
【図10】キャップの平面図である。FIG. 10 is a plan view of a cap.
【図11】図10のＸ−Ｏ−Ｘ線断面図である。FIG. 11 is a sectional view taken along line XOX of FIG. 10.
１ 円筒部 １ａ 先端開口部 ２ ハウジング ３ すべり軸受 ４ 軸 31 油受け用凹周溝 32 キャップ DESCRIPTION OF SYMBOLS 1 Cylindrical part 1a Tip opening part 2 Housing 3 Slide bearing 4 Shaft 31 Concave peripheral groove for oil receiving 32 Cap
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−60355（ＪＰ，Ａ) 特開 平６−178488（ＪＰ，Ａ) 特開 平６−150529（ＪＰ，Ａ) 特開 平６−269142（ＪＰ，Ａ) 実開 平１−58265（ＪＰ，Ｕ) 実開 平３−50955（ＪＰ，Ｕ) 実開 平５−55758（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 5/10 H02K 5/16 - 5/167 H02K 29/00 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-60355 (JP, A) JP-A-6-178488 (JP, A) JP-A-6-150529 (JP, A) JP-A-6-150529 269142 (JP, A) Japanese Utility Model 1-58265 (JP, U) Japanese Utility Model 3-50955 (JP, U) Japanese Utility Model 5-55758 (JP, U) (58) Fields surveyed (Int. 7 , DB name) H02K 5/10 H02K 5/16-5/167 H02K 29/00
Claims (1)
空円筒状のすべり軸受３に回転自在に挿通される軸４を
備えたブラシレスモータであって、上記円筒部１の先端
開口部１ａに、すべり軸受３側に開口する油受け用凹周
溝31を有するキャップ32を設け、かつ、該すべり軸受３
を油が含浸された多孔質材とすると共に、該すべり軸受
３の先端部３ａの半径方向外側部に、軸方向外側に延伸
される延伸部40を設け、上記凹周溝31と該延伸部40とが
相互に非接触状態で嵌まり合うことを特徴とするブラシ
レスモータ。1. Inside a cylindrical part 1 of a housing 2
A brushless motor having a shaft 4 that is rotatably inserted into an empty cylindrical sliding bearing 3, the distal end opening portion 1a of the cylindrical portion 1, the oil-receiving concave peripheral groove 31 which opens to the sliding bearing 3 side Provided with a cap 32, and the sliding bearing 3
Is a porous material impregnated with oil, and extends radially outward of the distal end 3a of the slide bearing 3 in the axially outward direction.
Is provided, the concave circumferential groove 31 and the extending portion 40
A brushless motor characterized in that they fit in a non-contact state with each other .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18724893A JP3181760B2 (en) | 1993-06-29 | 1993-06-29 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18724893A JP3181760B2 (en) | 1993-06-29 | 1993-06-29 | Brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0715904A JPH0715904A (en) | 1995-01-17 |
| JP3181760B2 true JP3181760B2 (en) | 2001-07-03 |
Family
ID=16202647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18724893A Expired - Fee Related JP3181760B2 (en) | 1993-06-29 | 1993-06-29 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3181760B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7669643B2 (en) | 2002-05-29 | 2010-03-02 | Alfa Laval Corporate Ab | Plate heat exchanger device and a heat exchanger plate |
-
1993
- 1993-06-29 JP JP18724893A patent/JP3181760B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7669643B2 (en) | 2002-05-29 | 2010-03-02 | Alfa Laval Corporate Ab | Plate heat exchanger device and a heat exchanger plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715904A (en) | 1995-01-17 |
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