JP5288284B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP5288284B2
JP5288284B2 JP2010028978A JP2010028978A JP5288284B2 JP 5288284 B2 JP5288284 B2 JP 5288284B2 JP 2010028978 A JP2010028978 A JP 2010028978A JP 2010028978 A JP2010028978 A JP 2010028978A JP 5288284 B2 JP5288284 B2 JP 5288284B2
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annular portion
radial direction
bearing
overlaps
reference end
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JP2011167005A (en
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智之 志摩
弘晃 荻原
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Denso Corp
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Denso Corp
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    • 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
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • 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
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Description

本発明は、発電機や電動機などの回転電機に関する。   The present invention relates to a rotating electrical machine such as a generator or an electric motor.

回転電機には、例えば、自動車やトラック等に搭載される車両用交流発電機がある。
従来より、回転動作中に外部から冷却風とともに飛来する異物が軸受け近傍の空間に侵入することを防止するようにした車両用交流発電機が知られている。例えば、特許文献１の車両用交流発電機では、リア側軸受けの外輪を保持するフレーム側の軸受け収納部と、回転子に取り付けられたリア側の冷却ファンの内周に設けられた円環部とを軸方向に重複させることにより、異物の侵入を防止している。 As the rotating electrical machine, for example, there is a vehicle AC generator mounted on an automobile, a truck, or the like.
2. Description of the Related Art Conventionally, there is known a vehicular AC generator that prevents foreign matters flying together with cooling air from the outside during rotation operation from entering a space near a bearing. For example, in the vehicle alternator disclosed in Patent Document 1, a frame-side bearing housing portion that holds an outer ring of a rear-side bearing, and an annular portion provided on the inner periphery of a rear-side cooling fan attached to the rotor Are overlapped in the axial direction to prevent intrusion of foreign matter.

特許文献１の車両用交流発電機のリア側軸受け部分を図９に示す。リア側の冷却ファン３６の径方向内側にバーリング加工による円環部３６ａが設けられ、円環部３６ａの端部が軸受け収納部４４の端部と軸方向に沿って重複している。この重複によって、外部から破線矢印Ｖのように飛来する水や塵等の異物は、円環部３６ａに遮られ軸受け近傍の空間４９への侵入が防止される。このように、壁を重ねることによって生じる効果を一般に「スリンガー効果」という。すなわち、特許文献１の車両用交流発電機は、スリンガー効果を利用して異物の侵入防止を図るものである。
また、円環部３６ａの径方向外側には複数の凸部３６ｂが形成されている。凸部３６ｂが水や塵等の異物をはじき飛ばすことで、異物の排除能力を高めている。 FIG. 9 shows a rear-side bearing portion of the vehicle alternator of Patent Document 1. An annular portion 36a is formed by burring on the inner side in the radial direction of the cooling fan 36 on the rear side, and an end portion of the annular portion 36a overlaps with an end portion of the bearing storage portion 44 along the axial direction. Due to this overlap, foreign matters such as water and dust flying from the outside as indicated by the broken arrow V are blocked by the annular portion 36a and prevented from entering the space 49 in the vicinity of the bearing. In this way, the effect generated by overlapping the walls is generally referred to as “slinger effect”. That is, the vehicular AC generator disclosed in Patent Document 1 uses the slinger effect to prevent foreign matter from entering.
A plurality of convex portions 36b are formed on the radially outer side of the annular portion 36a. The convex portion 36b repels foreign matter such as water and dust, thereby enhancing the foreign matter removal capability.

特開２００９−４４８３０号公報JP 2009-44830 A

特許文献１の構造では、円環部３６ａと軸受け収納部４４との重複構造が軸方向にのみ形成されていた。そのため、破線矢印Ｗに示すように上方からリブ４３および軸受け収納部４４の外周面を伝って軸受け近傍の空間４９に流れ込む水を防止できないという問題があった。   In the structure of Patent Document 1, an overlapping structure of the annular portion 36a and the bearing storage portion 44 is formed only in the axial direction. For this reason, there is a problem that water flowing into the space 49 in the vicinity of the bearing cannot be prevented from being transmitted from above the rib 43 and the outer peripheral surface of the bearing housing portion 44 as indicated by the broken arrow W.

また、軸受け収納部４４は、肉厚Ｔ０が比較的薄く外径が円環部３６ａよりも小さいので、周長が比較的短い。したがって、破線矢印Ａで示す冷却風に接触する放熱面積が小さく、軸受け収納部４４の放熱が充分にできない。そのため、軸受け３４の冷却効果が充分に得られず、軸受け３４のグリースの熱劣化による短寿命の原因となるおそれがあった。   Further, since the bearing housing portion 44 has a relatively thin wall thickness T0 and an outer diameter smaller than that of the annular portion 36a, the circumferential length is relatively short. Therefore, the heat radiation area in contact with the cooling air indicated by the broken line arrow A is small, and the heat radiation of the bearing housing portion 44 cannot be sufficiently performed. Therefore, the cooling effect of the bearing 34 is not sufficiently obtained, and there is a possibility that the life of the grease of the bearing 34 may be shortened due to thermal deterioration.

本発明は、このような点に鑑みて創作されたものであり、その目的は、軸受け近傍の空間への異物の侵入防止効果を高めるとともに、軸受けの冷却効果を向上する回転電機を提供することにある。   The present invention was created in view of the above points, and an object of the present invention is to provide a rotating electrical machine that enhances the effect of preventing foreign matter from entering a space near the bearing and improves the cooling effect of the bearing. It is in.

請求項１に記載の回転電機は、巻線が巻回される固定子と、固定子の径方向内側に回転可能に配置される回転子と、回転子の磁極の軸方向端面に配置されて回転子とともに回転する冷却ファンと、冷却ファンの径方向内側にて軸方向に曲げられて形成され、当該冷却ファンから軸方向に延びる円環部と、回転子を回転可能に支持する軸受けと、軸受けを保持する軸受け収納部が設けられるフレームとを備えており、軸受け収納部は、外周面が径方向外側に広げられ、回転子の軸方向かつ径方向に円環部と重複する。
The rotating electrical machine according to claim 1 is disposed on a stator in which a winding is wound, a rotor rotatably disposed on a radially inner side of the stator, and an axial end surface of a magnetic pole of the rotor. A cooling fan that rotates together with the rotor, an annular portion that is bent in the axial direction on the radially inner side of the cooling fan, extends in the axial direction from the cooling fan, and a bearing that rotatably supports the rotor; And a frame provided with a bearing housing portion that holds the bearing. The bearing housing portion has an outer peripheral surface that is widened radially outward and overlaps the annular portion in the axial direction and the radial direction of the rotor.

従来技術では、軸受け収納部は、軸方向のみで円環部と重複していた。それに対し、本発明では、軸受け収納部は、軸方向と径方向との両方で円環部と重複する。これにより、スリンガー効果の向上により異物の侵入防止能力を高めることができる。
また、径方向に重複範囲を設けるのに伴って軸受け収納部の外周面を径方向外側に広げることにより、軸受け収納部の肉厚が厚くなり、周長が増すため、放熱面積が増大する。よって、軸受けの冷却効果を向上することができる。
その結果、軸受け近傍の空間への異物の侵入防止効果が高められ、また、軸受けの冷却効果が向上する。 In the prior art, the bearing storage portion overlaps the annular portion only in the axial direction. On the other hand, in the present invention, the bearing housing portion overlaps the annular portion in both the axial direction and the radial direction. Thereby, the penetration | invasion prevention capability of a foreign material can be improved by the improvement of a slinger effect.
Further, by expanding the outer peripheral surface of the bearing storage portion radially outward as the overlapping range is provided in the radial direction, the thickness of the bearing storage portion is increased and the peripheral length is increased, so that the heat radiation area is increased. Therefore, the bearing cooling effect can be improved.
As a result, the effect of preventing foreign matter from entering the space near the bearing is enhanced, and the bearing cooling effect is improved.

請求項２〜６に記載の回転電機では、請求項１に記載の回転電機において、軸受け収納部と円環部とが重複する構成が特定して示される。
請求項２に記載の回転電機では、軸受け収納部は、基準端面、凹段差面、及び、外向壁を有する。基準端面は、円環部側の端面である。凹段差面は、基準端面の径方向外側に位置し、基準端面に対し円環部と反対側に形成される。外向壁は、径方向外側に面して周方向に形成され、基準端面と凹段差面とを接続する。そして、凹段差面が円環部と径方向に重複し、外向壁が円環部と軸方向に重複する。 In the rotating electrical machine according to claims 2 to 6, in the rotating electrical machine according to claim 1, a configuration in which the bearing housing portion and the annular portion overlap is specified and shown.
In the rotary electric machine according to claim 2, the bearing housing portion has a reference end surface, a concave step surface, and an outward wall. The reference end face is an end face on the annular portion side. The concave step surface is located on the outer side in the radial direction of the reference end surface, and is formed on the side opposite to the annular portion with respect to the reference end surface. The outward wall is formed in the circumferential direction facing the radially outer side, and connects the reference end surface and the concave step surface. The concave step surface overlaps with the annular portion in the radial direction, and the outward wall overlaps with the annular portion in the axial direction.

この構成により、軸受け収納部の円環部側の端面と外周面との境界に凹段差面を設けることで径方向の重複範囲を簡単に形成することができる。   With this configuration, it is possible to easily form an overlapping range in the radial direction by providing a concave step surface at the boundary between the end surface on the annular portion side of the bearing storage portion and the outer peripheral surface.

さらに請求項３に記載の回転電機では、円環部は径方向外側に曲折して外折縁部を形成し、凹段差面が該外折縁部と径方向に重複する。
また、請求項４に記載の回転電機では、円環部は径方向内側に曲折して内折縁部を形成し、凹段差面が該内折縁部と径方向に重複する。 Furthermore, in the rotary electric machine according to claim 3, the annular portion is bent radially outward to form an outer folding edge, and the concave step surface overlaps the outer folding edge in the radial direction.
In the rotating electric machine according to claim 4, the annular portion is bent radially inward to form an inner folded edge, and the concave step surface overlaps the inner folded edge in the radial direction.

円環部の端面が凹段差面に対向する場合、円環部の板厚が軸受け収納部と径方向に重複する。そこで、重複範囲を増やそうとすれば板厚を厚くする必要があり、重量増加やコストアップを招くことになる。
それに対し、円環部に外折縁部または内折縁部を設けた場合、外折縁部または内折縁部の長さの分だけ軸受け収納部と径方向に重複するため、重複範囲を容易に増やすことができる。重複範囲を増やすことにより、スリンガー効果が向上し、軸受け近傍の空間への異物の侵入防止能力を高めることができる。 When the end surface of the annular portion faces the concave stepped surface, the plate thickness of the annular portion overlaps with the bearing storage portion in the radial direction. Therefore, if the overlapping range is increased, it is necessary to increase the plate thickness, resulting in an increase in weight and an increase in cost.
On the other hand, when the outer folding edge or inner folding edge is provided in the annular part, it overlaps with the bearing storage part in the radial direction by the length of the outer folding edge or inner folding edge, so the overlapping range is It can be increased easily. By increasing the overlapping range, the slinger effect is improved and the ability to prevent foreign matter from entering the space near the bearing can be enhanced.

また、円環部を径方向外側に曲げる場合には、外折縁部の長さに応じて軸受け収納部の外周面を径方向外側にさらに広げることにより、軸受け収納部の肉厚が厚くなり周長が増すため、放熱面積がさらに増大する。よって、軸受けの冷却効果をさらに向上することができる。
なお、円環部を径方向外側に曲げる場合と内側に曲げる場合とを比較すると、径方向内側に曲げる方が製造しやすい。 In addition, when bending the annular part radially outward, the outer peripheral surface of the bearing storage part is further expanded radially outward according to the length of the outer folding edge, thereby increasing the thickness of the bearing storage part. Since the perimeter increases, the heat radiation area further increases. Therefore, the bearing cooling effect can be further improved.
Note that, when the case where the annular portion is bent radially outward and the case where the annular portion is bent radially inward is compared, it is easier to manufacture the case where the annular portion is bent radially inward.

請求項５に記載の回転電機では、軸受け収納部は、基準端面、凸段差面、及び、内向壁を有する。基準端面は円環部側の端面である。凸段差面は、基準端面および円環部の径方向外側に位置し、基準端面に対し円環部側に形成される。内向壁は、径方向内側に面して周方向に形成され、基準端面と凸段差面とを接続する。そして、基準端面が円環部と径方向に重複し、内向壁が円環部と軸方向に重複する。   In the rotary electric machine according to claim 5, the bearing housing portion has a reference end surface, a convex step surface, and an inward wall. The reference end face is an end face on the annular portion side. The convex step surface is located on the outer side in the radial direction of the reference end surface and the annular portion, and is formed on the annular portion side with respect to the reference end surface. The inward wall is formed in the circumferential direction facing the inner side in the radial direction, and connects the reference end surface and the convex step surface. The reference end surface overlaps with the annular portion in the radial direction, and the inward wall overlaps with the annular portion in the axial direction.

この構成により、凸段差面は、径方向内側への異物の侵入路を覆うように形成される。したがって、軸受け近傍の空間への異物の侵入防止効果がさらに向上する。   With this configuration, the convex stepped surface is formed so as to cover the entry path of the foreign substance to the radially inner side. Therefore, the effect of preventing foreign matter from entering the space near the bearing is further improved.

また、円環部の径方向外側に凸段差面を形成するため軸受け収納部の外周面を径方向外側にさらに広げることにより、軸受け収納部の肉厚が厚くなり、周長が増すため、放熱面積がさらに増大する。よって、軸受けの冷却効果をさらに向上することができる。   In addition, since the convex stepped surface is formed on the outer side in the radial direction of the annular part, the outer peripheral surface of the bearing storage part is further expanded outward in the radial direction, so that the thickness of the bearing storage part is increased and the peripheral length is increased. The area further increases. Therefore, the bearing cooling effect can be further improved.

請求項６に記載の回転電機では、軸受け収納部は、基準端面および凹溝を有する。基準端面は、円環部側の端面である。凹溝は、基準端面の径方向外側に位置し、基準端面に対し円環部と反対側に形成される。そして、凹溝の溝底面が円環部と径方向に重複し、凹溝の径方向内側の周方向に形成される外向溝壁と凹溝の径方向外側の周方向に形成される内向溝壁とが円環部と軸方向に重複する。   In the rotating electrical machine according to claim 6, the bearing housing portion has a reference end face and a concave groove. The reference end face is an end face on the annular portion side. The concave groove is located on the outer side in the radial direction of the reference end surface, and is formed on the side opposite to the annular portion with respect to the reference end surface. Then, the groove bottom surface of the groove overlaps with the annular portion in the radial direction, the outward groove wall formed in the circumferential direction on the radially inner side of the groove, and the inward groove formed in the circumferential direction on the radially outer side of the groove. The wall overlaps with the torus in the axial direction.

この構成により、軸受け収納部は、軸方向で２箇所、径方向で１箇所の計３箇所で円環部と重複するため、スリンガー効果がさらに向上する。よって、異物の侵入防止効果が最良となる。   With this configuration, the bearing housing portion overlaps with the annular portion at a total of three locations, two in the axial direction and one in the radial direction, so that the slinger effect is further improved. Therefore, the foreign matter intrusion preventing effect is the best.

本発明の第１実施形態による車両用交流発電機の全体構成を示す断面図である。It is sectional drawing which shows the whole structure of the vehicle alternator by 1st Embodiment of this invention. 図１のＺ方向から視たリア側のフレーム４の側面図である。FIG. 2 is a side view of the rear frame 4 as viewed from the Z direction in FIG. 1. 本発明の実施形態による回転電機を車両用交流発電機として適用した構成図である。It is the block diagram which applied the rotary electric machine by embodiment of this invention as an alternating current generator for vehicles. 本発明の第１実施形態による車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles by 1st Embodiment of this invention. 本発明の第２実施形態による車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles by 2nd Embodiment of this invention. 本発明の第３実施形態による車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles by 3rd Embodiment of this invention. 本発明の第４実施形態による車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles by 4th Embodiment of this invention. 本発明の第５実施形態による車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles by 5th Embodiment of this invention. 従来技術の車両用交流発電機の要部断面図である。It is principal part sectional drawing of the alternating current generator for vehicles of a prior art.

以下、本発明の実施形態による回転電機を図面に基づいて説明する。
（第１実施形態）
図３に、本発明の実施形態の回転電機を車両用交流発電機として適用した構成を示す。
エンジン８０は、車両の動力発生装置であり、図示しないクランク軸が左右の駆動輪８１を連結するドライブシャフト８２と機械的に連結されている。自動変速装置９０は、クランク軸から駆動輪８１へ動力を伝達する動力伝達系統に設けられている。 Hereinafter, a rotating electrical machine according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
In FIG. 3, the structure which applied the rotary electric machine of embodiment of this invention as an alternating current generator for vehicles is shown.
The engine 80 is a vehicle power generation device, and a crankshaft (not shown) is mechanically connected to a drive shaft 82 that connects the left and right drive wheels 81. The automatic transmission 90 is provided in a power transmission system that transmits power from the crankshaft to the drive wheels 81.

回転電機としての車両用交流発電機１は、エンジン８０のクランク軸と機械的に接続され、伝達された運動エネルギーを電気エネルギーに変換する。変換された電気エネルギーはバッテリ８４に充電される。バッテリ８４は、車両用交流発電機１、スタータ８５、及び、電装品８７等と接続され、直流電力を供給する。スタータ８５は、エンジン８０のクランク軸に初期回転を付与する。電装品８７は、空調装置、ヘッドライト、燃料噴射装置等から構成される。   The vehicle alternator 1 as a rotating electrical machine is mechanically connected to the crankshaft of the engine 80 and converts the transmitted kinetic energy into electric energy. The converted electrical energy is charged in the battery 84. The battery 84 is connected to the vehicle AC generator 1, the starter 85, the electrical component 87, and the like, and supplies DC power. The starter 85 applies initial rotation to the crankshaft of the engine 80. The electrical component 87 includes an air conditioner, a headlight, a fuel injection device, and the like.

次に、図１を参照して、第１実施形態の回転電機の全体構成について説明する。車両用交流発電機１は、固定子２、回転子３、フレーム４、ブラシ装置５、リアカバー６等を含んで構成されている。図１において、左側がフロント側、右側がリア側である。
固定子２は、回転子３のポールコア３２の径方向外側に所定の隙間を介して配置されている。固定子２は、固定子鉄心２２と、３相の固定子巻線２３と、固定子鉄心２２と固定子巻線２３との間を電機絶縁するインシュレータ２４とを備えている。 Next, the overall configuration of the rotating electrical machine according to the first embodiment will be described with reference to FIG. The vehicle alternator 1 includes a stator 2, a rotor 3, a frame 4, a brush device 5, a rear cover 6, and the like. In FIG. 1, the left side is the front side and the right side is the rear side.
The stator 2 is arranged on the radially outer side of the pole core 32 of the rotor 3 with a predetermined gap. The stator 2 includes a stator core 22, a three-phase stator winding 23, and an insulator 24 that electrically insulates between the stator core 22 and the stator winding 23.

回転子３は、界磁巻線３１、ポールコア３２、及び、回転軸３３を備えている。界磁巻線３１は、絶縁処理された銅線を円筒状かつ同心状に巻回したものである。磁極としてのポールコア３２は図示しない６個の爪部を有し、界磁巻線３１を両側から挟み込んでいる。回転軸３３は、ポールコア３２の中心に同軸に設けられ、ポールコア３２と一体に回転する。   The rotor 3 includes a field winding 31, a pole core 32, and a rotation shaft 33. The field winding 31 is a cylindrical and concentric winding of an insulated copper wire. The pole core 32 as a magnetic pole has six claw portions (not shown) and sandwiches the field winding 31 from both sides. The rotation shaft 33 is provided coaxially at the center of the pole core 32 and rotates integrally with the pole core 32.

フレーム４は、固定子２および回転子３を収容している。フロント側の軸受け３９、及び、リア側の軸受け３４は、フレーム４に保持され、回転軸３３を回転可能に支持している。リア側の軸受け３４は、リア側のフレーム４の軸受け収納部４４に収容されている。
フレーム４の軸方向端面に面して吸入窓４１が設けられている。吸入窓４１は、例えばリア側のフレーム４において、図２に示すように、周方向をリブ４３で仕切られて４箇所に設けられている。また、フレーム４の外周に面して吐出窓４２が設けられている。これにより、吸入窓４１から車両用交流発電機１の内部に冷却風が吸入され、吐出窓４２から吐出される。 The frame 4 accommodates the stator 2 and the rotor 3. The front-side bearing 39 and the rear-side bearing 34 are held by the frame 4 and support the rotary shaft 33 so as to be rotatable. The rear side bearing 34 is accommodated in a bearing accommodating portion 44 of the rear side frame 4.
A suction window 41 is provided facing the axial end surface of the frame 4. As shown in FIG. 2, for example, the suction window 41 is provided at four locations in the rear frame 4 with the circumferential direction partitioned by ribs 43. A discharge window 42 is provided facing the outer periphery of the frame 4. As a result, the cooling air is sucked into the vehicle alternator 1 from the suction window 41 and discharged from the discharge window 42.

フロント側のポールコア３２の軸方向端面には、フロント側から吸入した冷却風を軸方向および径方向に吐出するための冷却ファン３５が溶接等によって取り付けられている。同様に、リア側のポールコア３２の軸方向端面には、リア側から吸入した冷却風を径方向に吐出するための冷却ファン３６が溶接等によって取り付けられている。冷却ファン３６の径方向内側には、円環形状で軸方向に延びる円環部３６ａがバーリング加工により設けられている。   A cooling fan 35 for discharging cooling air sucked from the front side in the axial direction and the radial direction is attached to the axial end surface of the pole core 32 on the front side by welding or the like. Similarly, a cooling fan 36 for discharging the cooling air sucked from the rear side in the radial direction is attached to the end face in the axial direction of the pole core 32 on the rear side by welding or the like. On the inner side in the radial direction of the cooling fan 36, an annular portion 36a that is annular and extends in the axial direction is provided by burring.

回転軸３３のリア側端部近傍には、界磁巻線３１の両端に電気的に接続された２つのスリップリング３７、３８が備えられており、スリップリング３７、３８を介してブラシ装置５から界磁巻線３１に対して給電が行われる。
ブラシ装置５は、２つのスリップリング３７、３８のそれぞれに摺接する２つのブラシ５１、５２を収納するブラシホルダ５３を含んで構成されている。
リアカバー６は、リア側のフレーム４の外側に取り付けられるブラシ装置５や整流装置７およびＩＣレギュレータ８を覆うように取り付けられ、これらを異物から保護する。 Two slip rings 37 and 38 electrically connected to both ends of the field winding 31 are provided in the vicinity of the rear side end portion of the rotating shaft 33, and the brush device 5 is provided via the slip rings 37 and 38. To the field winding 31.
The brush device 5 includes a brush holder 53 that houses two brushes 51 and 52 that are in sliding contact with the two slip rings 37 and 38, respectively.
The rear cover 6 is attached so as to cover the brush device 5, the rectifying device 7 and the IC regulator 8 which are attached to the outside of the rear frame 4, and protects these from foreign matters.

次に、軸受け収納部４４および円環部３６ａの詳細について図４に基づいて説明する。図４は、図１のＰ部拡大図である。
軸受け３４はラジアル型のボールベアリングであり、軸受け収納部４４に保持される。軸受け３４と軸受け収容部４４の底面との間にはスプリングワッシャ４５が介装される。 Next, details of the bearing storage portion 44 and the annular portion 36a will be described with reference to FIG. FIG. 4 is an enlarged view of a portion P in FIG.
The bearing 34 is a radial ball bearing, and is held in the bearing storage portion 44. A spring washer 45 is interposed between the bearing 34 and the bottom surface of the bearing housing portion 44.

軸受け収納部４４は、基準端面４４ａ、凹段差面４４ｂ、外向壁４４ｃ、及び、外周面４４ｚを有する。基準端面４４ａは円環部３６ａ側の基準端面である。凹段差面４４ｂは、基準端面４４ａの径方向外側に位置し、基準端面４４ａに対し円環部３６ａと反対側に形成される。外向壁４４ｃは、径方向外側に面して周方向に形成され、基準端面４４ａと凹段差面４４ｂとを接続する。外向壁４４ｃは、回転軸３３に略平行である。   The bearing storage portion 44 has a reference end surface 44a, a concave step surface 44b, an outward wall 44c, and an outer peripheral surface 44z. The reference end face 44a is a reference end face on the annular portion 36a side. The concave step surface 44b is located on the radially outer side of the reference end surface 44a and is formed on the opposite side of the annular portion 36a with respect to the reference end surface 44a. The outward wall 44c is formed in the circumferential direction facing the radially outer side, and connects the reference end surface 44a and the concave step surface 44b. The outward wall 44 c is substantially parallel to the rotation shaft 33.

円環部３６ａの端面３６ｓは、軸方向に、基準端面４４ａと凹段差面４４ｂとの間に位置し、径方向に、外向壁４４ｃと外周面４４ｚとの間に位置する。これにより、軸受け収納部４４は、凹段差面４４ｂが円環部３６ａと径方向に重複し、外向壁４４ｃが円環部３６ａと軸方向に重複する。径方向については、端面３６ｓの幅、すなわち円環部３６ａの板厚が重複範囲となる。   The end surface 36s of the annular portion 36a is positioned between the reference end surface 44a and the concave stepped surface 44b in the axial direction, and is positioned between the outward wall 44c and the outer peripheral surface 44z in the radial direction. Thereby, as for the bearing accommodating part 44, the concave level | step difference surface 44b overlaps with the annular part 36a in radial direction, and the outward wall 44c overlaps with the annular part 36a in an axial direction. In the radial direction, the width of the end face 36s, that is, the plate thickness of the annular portion 36a is in the overlapping range.

外周面４４ｚは、図２に示すように、周方向の４箇所でリブ４３に接続している。また、周方向のリブ４３に接続していない部分は吸入窓４１に面している。これにより、吸入窓４１を通る冷却風が外周面４４ｚに接触し、軸受け収納部４４の熱が放熱される。
また、軸受け収納部４４の肉厚を従来技術と比較すると、凹段差面４４ｂを設けるのに伴って外周面４４ｚを径方向外側に広げることにより、第１実施形態の肉厚Ｔ１は従来技術の肉厚Ｔ０（図９参照）よりも厚くなっている。 As shown in FIG. 2, the outer peripheral surface 44 z is connected to the ribs 43 at four locations in the circumferential direction. Further, the portion not connected to the circumferential rib 43 faces the suction window 41. Thereby, the cooling air passing through the suction window 41 comes into contact with the outer peripheral surface 44z, and the heat of the bearing housing portion 44 is radiated.
Further, when comparing the thickness of the bearing housing portion 44 with the prior art, the thickness T1 of the first embodiment is the same as that of the prior art by widening the outer peripheral surface 44z radially outward as the concave stepped surface 44b is provided. It is thicker than the wall thickness T0 (see FIG. 9).

（作用）
次に、車両用交流発電機１の作用を説明する。エンジン８０からの回転力がベルト等を介して車両用交流発電機１のプーリ２０に伝えられると、回転子３が所定方向に回転する。この状態で回転子３の界磁巻線３１に外部から励磁電圧を印加することにより、ポールコア３２のそれぞれの爪部が励磁され、固定子巻線２３に３相交流電圧を発生させる。 (Function)
Next, the operation of the vehicle alternator 1 will be described. When the rotational force from the engine 80 is transmitted to the pulley 20 of the vehicle alternator 1 via a belt or the like, the rotor 3 rotates in a predetermined direction. In this state, by applying an excitation voltage from the outside to the field winding 31 of the rotor 3, each claw portion of the pole core 32 is excited, and a three-phase AC voltage is generated in the stator winding 23.

回転子３の回転と共に冷却ファン３５、３６が回転することにより、冷却風が吸入窓４１から吸入され、吐出窓４２から吐出される。冷却風によって、軸受け３４、３９に発生する摩擦熱が放熱され、グリースの熱劣化などによる耐久劣化が防止される。
また、特にリア側では、冷却風と共に侵入する水や塵等の異物が不具合の原因となるおそれがある。そこで、軸受け収納部４４が軸方向かつ径方向に円環部３６ａと重複することで異物の侵入を防止する。 When the cooling fans 35 and 36 rotate together with the rotation of the rotor 3, the cooling air is sucked from the suction window 41 and discharged from the discharge window 42. The frictional heat generated in the bearings 34 and 39 is dissipated by the cooling air, and durability deterioration due to thermal deterioration of the grease is prevented.
In particular, on the rear side, foreign matter such as water and dust entering with the cooling air may cause a problem. Therefore, the bearing housing portion 44 overlaps the annular portion 36a in the axial direction and the radial direction, thereby preventing foreign matter from entering.

（効果）
特許文献１の従来技術では、軸受け収納部４４は、軸方向のみで円環部３６ａと重複していた。それに対し、本発明では、軸受け収納部４４は、軸方向と径方向との両方で円環部３６ａと重複する。これにより、スリンガー効果が向上し、異物の侵入防止能力を高めることができる。すなわち、リブ４３から破線矢印Ｗのように流れ落ちた異物は、外向壁４４ｃが障壁となって軸受け近傍の空間４９への侵入が防止される。
また、肉厚Ｔ１が厚くなり、外周面４４ｚの周長が増すため、破線矢印Ａで示す冷却風に接触する放熱面積が増大する。よって、軸受け３４の冷却効果を向上させることができる。 (effect)
In the prior art of Patent Document 1, the bearing storage portion 44 overlaps the annular portion 36a only in the axial direction. On the other hand, in the present invention, the bearing housing portion 44 overlaps the annular portion 36a both in the axial direction and in the radial direction. Thereby, a slinger effect improves and the invasion prevention capability of a foreign material can be improved. That is, the foreign matter that has flowed down from the rib 43 as indicated by the broken line arrow W is prevented from entering the space 49 in the vicinity of the bearing, with the outward wall 44c serving as a barrier.
Further, since the wall thickness T1 is increased and the peripheral length of the outer peripheral surface 44z is increased, the heat radiation area in contact with the cooling air indicated by the dashed arrow A is increased. Therefore, the cooling effect of the bearing 34 can be improved.

以下、本発明の第２〜第５実施形態について図面に基づいて説明する。なお、第１実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。
（第２実施形態）
本発明の第２実施形態を図５に基づいて説明する。
円環部３６ａは軸受け収納部４４の近傍で径方向外側に約９０°曲げられて、外折縁部３６ｔが形成されている。外折縁部３６ｔは、軸受け収納部４４の凹段差面４４ｂにほぼ平行に対向し、径方向に重複する。また、曲げられていない部分である原円環部３６ｒは収納部４４の外向壁部４４ｃと軸方向に重複する。 Hereinafter, 2nd-5th embodiment of this invention is described based on drawing. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st Embodiment, and description is abbreviate | omitted.
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG.
The annular portion 36a is bent about 90 ° radially outward in the vicinity of the bearing housing portion 44 to form an outer folded edge portion 36t. The outer folded edge 36t faces the concave step surface 44b of the bearing storage portion 44 substantially in parallel and overlaps in the radial direction. In addition, the original circular portion 36 r that is not bent overlaps the outward wall portion 44 c of the storage portion 44 in the axial direction.

また、外折縁部３６ｔの長さに対応した凹段差面４４ｂを設けるのに伴って外周面４４ｚをさらに径方向外側に広げることにより、軸受け収納部４４の肉厚Ｔ２は第１実施形態の肉厚Ｔ１よりも厚くなっている。   Further, by providing the concave step surface 44b corresponding to the length of the outer folding edge 36t, the outer peripheral surface 44z is further expanded radially outward, so that the wall thickness T2 of the bearing storage portion 44 is the same as that of the first embodiment. It is thicker than the wall thickness T1.

円環部３６ａの端面３６ｓが凹段差面４４ｂに対向する場合、円環部３６ａの板厚が軸受け収納部４４と径方向に重複する。そこで、重複範囲を増やそうとすれば板厚を厚くする必要があり、重量増加やコストアップを招くことになる。
それに対し、円環部３６ａに外折縁部３６ｔを設けた場合、外折縁部３６ｔの長さの分だけ軸受け収納部４４と径方向に重複するため、容易に重複範囲を増やすことができる。重複範囲を増やすことにより、スリンガー効果が向上し、軸受け近傍の空間４９への異物の侵入防止能力を高めることができる。 When the end surface 36s of the annular portion 36a faces the concave step surface 44b, the plate thickness of the annular portion 36a overlaps with the bearing storage portion 44 in the radial direction. Therefore, if the overlapping range is increased, it is necessary to increase the plate thickness, resulting in an increase in weight and an increase in cost.
On the other hand, when the outer fold edge portion 36t is provided in the annular portion 36a, it overlaps in the radial direction with the bearing storage portion 44 by the length of the outer fold edge portion 36t, so that the overlapping range can be easily increased. . By increasing the overlapping range, the slinger effect is improved and the ability to prevent foreign matter from entering the space 49 in the vicinity of the bearing can be enhanced.

また、肉厚Ｔ２が厚くなり、外周面４４ｚの周長が増すため、破線矢印Ａで示す冷却風に接触する放熱面積がさらに増大する。よって、軸受け３４の冷却効果をさらに向上させることができる。   Further, since the thickness T2 is increased and the peripheral length of the outer peripheral surface 44z is increased, the heat radiation area in contact with the cooling air indicated by the broken line arrow A is further increased. Therefore, the cooling effect of the bearing 34 can be further improved.

（第３実施形態）
本発明の第３実施形態を図６に基づいて説明する。
円環部３６ａは軸受け収納部４４の近傍で径方向内側に約９０°曲げられて、内折縁部３６ｕが形成されている。内折縁部３６ｕは、軸受け収納部４４の凹段差面４４ａにほぼ平行に対向し、径方向に重複する。また、端面３６ｓは収納部４４の外向壁部４４ｃと軸方向に重複する。
なお、軸受け収納部４４の肉厚Ｔ３は、第２実施形態の肉厚Ｔ２と同程度である。 (Third embodiment)
A third embodiment of the present invention will be described with reference to FIG.
The annular portion 36a is bent about 90 ° radially inward in the vicinity of the bearing housing portion 44 to form an inner folded edge portion 36u. The inner folding edge portion 36u faces the concave step surface 44a of the bearing storage portion 44 substantially in parallel and overlaps in the radial direction. The end face 36s overlaps the outward wall 44c of the storage part 44 in the axial direction.
The wall thickness T3 of the bearing storage portion 44 is approximately the same as the wall thickness T2 of the second embodiment.

第２実施形態と同様、円環部３６ａに内折縁部３６ｕを設けた場合、内折縁部３６ｕの長さの分だけ軸受け収納部４４と径方向に重複するため、容易に重複範囲を増やすことができる。重複範囲を増やすことにより、スリンガー効果が向上し、軸受け近傍の空間４９への異物の侵入防止能力を高めることができる。
また、第２実施形態と同等の冷却効果が得られる。
なお、第２実施形態と第３実施形態とを比較すると、円環部３６ａを径方向内側に曲げる第３実施形態の方が製造しやすい。 As in the second embodiment, when the inner folding edge 36u is provided in the annular portion 36a, the overlapping portion easily overlaps with the bearing storage portion 44 in the radial direction by the length of the inner folding edge 36u. Can be increased. By increasing the overlapping range, the slinger effect is improved and the ability to prevent foreign matter from entering the space 49 in the vicinity of the bearing can be enhanced.
Moreover, the cooling effect equivalent to 2nd Embodiment is acquired.
When the second embodiment and the third embodiment are compared, the third embodiment in which the annular portion 36a is bent radially inward is easier to manufacture.

（第４実施形態）
本発明の第４実施形態を図７に基づいて説明する。
軸受け収納部４４は、基準端面４４ａ、凸段差面４４ｄ、内向壁４４ｅ、及び、外周面４４ｚを有する。凸段差面４４ｄは、基準端面４４ａの径方向外側に位置し、基準端面４４ａに対し円環部３６ａ側に形成される。内向壁４４ｅは、径方向内側に面して周方向に形成され、基準端面４４ａと凸段差面４４ｄとを接続する。内向壁４４ｅは、回転軸３３に略平行である。 (Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIG.
The bearing storage portion 44 has a reference end surface 44a, a convex step surface 44d, an inward wall 44e, and an outer peripheral surface 44z. The convex step surface 44d is located on the radially outer side of the reference end surface 44a and is formed on the annular portion 36a side with respect to the reference end surface 44a. The inward wall 44e faces the radially inner side and is formed in the circumferential direction, and connects the reference end surface 44a and the convex step surface 44d. The inward wall 44e is substantially parallel to the rotation shaft 33.

円環部３６ａの端面３６ｓは、軸方向に、凸段差面４４ｄと基準端面４４ａとの間に位置し、径方向に、内向壁４４ｅの径方向内側に位置する。これにより、軸受け収納部４４は、基準端面４４ａが円環部３６ａと径方向に重複し、内向壁４４ｅが円環部３６ａと軸方向に重複する。径方向については、端面３６ｓの幅、すなわち円環部３６ａの板厚が重複範囲となる。   An end surface 36s of the annular portion 36a is positioned between the convex step surface 44d and the reference end surface 44a in the axial direction, and is positioned radially inward of the inward wall 44e. Thereby, as for the bearing accommodating part 44, the reference | standard end surface 44a overlaps with the annular part 36a in radial direction, and the inward wall 44e overlaps with the annular part 36a in an axial direction. In the radial direction, the width of the end face 36s, that is, the plate thickness of the annular portion 36a is in the overlapping range.

また、円環部３６ａの径方向外側に凸段差面４４ｄを形成するため外周面４４ｚをさらに径方向外側に広げることにより、軸受け収納部４４の肉厚Ｔ４は、第１実施形態の肉厚Ｔ１または第２実施形態の肉厚Ｔ２よりも厚くなっている。   Further, by forming the convex stepped surface 44d on the radially outer side of the annular portion 36a, the outer peripheral surface 44z is further expanded radially outward so that the thickness T4 of the bearing storage portion 44 is equal to the thickness T1 of the first embodiment. Alternatively, it is thicker than the wall thickness T2 of the second embodiment.

第４実施形態では、基準端面４４ａの径方向外側に、基準端面４４ａに対し円環部３６ａ側に凸段差面４４ｄが形成される。すなわち、凸段差面４４ｄは、径方向内側への異物の侵入路を覆うように形成される。破線矢印Ｗで示すようにリブ４３から流れ落ちた異物に対しては、円環部３６ａの端面３６ｓによるスリンガー効果に加え、円環部３６ａの遠心力による排出効果もある。したがって、軸受け近傍の空間４９への異物の侵入防止効果がさらに向上する。   In the fourth embodiment, a convex step surface 44d is formed on the annular portion 36a side with respect to the reference end surface 44a outside the reference end surface 44a in the radial direction. That is, the convex stepped surface 44d is formed so as to cover the entry path of the foreign matter inward in the radial direction. As shown by the broken line arrow W, the foreign matter that has flowed down from the rib 43 has a discharge effect due to the centrifugal force of the annular portion 36a in addition to the slinger effect by the end surface 36s of the annular portion 36a. Therefore, the effect of preventing foreign matter from entering the space 49 in the vicinity of the bearing is further improved.

また、肉厚Ｔ４が厚くなり、外周面４４ｚの周長が増すため、破線矢印Ａで示す冷却風に接触する放熱面積がさらに増大する。よって、軸受け３４の冷却効果をさらに向上させることができる。   Further, since the wall thickness T4 is increased and the peripheral length of the outer peripheral surface 44z is increased, the heat radiation area in contact with the cooling air indicated by the dashed arrow A is further increased. Therefore, the cooling effect of the bearing 34 can be further improved.

（第５実施形態）
本発明の第５実施形態を図８に基づいて説明する。
軸受け収納部４４は、基準端面４４ａ、凹溝４４ｆ、及び、外周面４４ｚを有する。凹溝４４ｆは、基準端面４４ａの径方向外側に位置し、基準端面４４ａに対し円環部３６ａと反対側に形成される。凹溝４４ｆは、溝底面４４ｇ、径方向内側の外向溝壁４４ｈ、及び、径方向外側の内向溝壁４４ｉを有する。 (Fifth embodiment)
A fifth embodiment of the present invention will be described with reference to FIG.
The bearing storage portion 44 has a reference end surface 44a, a concave groove 44f, and an outer peripheral surface 44z. The concave groove 44f is located on the radially outer side of the reference end surface 44a, and is formed on the opposite side of the annular portion 36a with respect to the reference end surface 44a. The concave groove 44f has a groove bottom surface 44g, a radially inner outward groove wall 44h, and a radially outer groove wall 44i.

円環部３６ａの端面３６ｓは、軸方向に、基準端面４４ａと溝底面４４ｇとの間に位置し、径方向に、外向溝壁４４ｈとの内向溝壁４４ｉとの間に位置する。これにより、軸受け収納部４４は、溝底面４４ｇが円環部３６ａと径方向に重複し、外向溝壁４４ｈおよび内向溝壁４４ｉが円環部３６ａと軸方向に重複する。径方向については、端面３６ｓの幅、すなわち円環部３６ａの板厚が重複範囲となる。
なお、軸受け収納部４４の肉厚Ｔ５は、第４実施形態の肉厚Ｔ４と同程度である。 The end surface 36s of the annular portion 36a is positioned between the reference end surface 44a and the groove bottom surface 44g in the axial direction, and is positioned between the inward groove wall 44i and the outward groove wall 44h in the radial direction. Thereby, as for the bearing accommodating part 44, the groove bottom face 44g overlaps with the annular part 36a in radial direction, and the outward groove wall 44h and the inward groove wall 44i overlap with the annular part 36a in the axial direction. In the radial direction, the width of the end face 36s, that is, the plate thickness of the annular portion 36a is in the overlapping range.
The wall thickness T5 of the bearing storage portion 44 is approximately the same as the wall thickness T4 of the fourth embodiment.

第５実施形態では、軸受け収納部４４は、軸方向で２箇所、径方向で１箇所の計３箇所で円環部３６ａと重複するため、軸受け近傍の空間４９まで侵入する可能性はさらに低くなる。
また、第４実施形態と同等の冷却効果が得られる。 In the fifth embodiment, since the bearing storage portion 44 overlaps with the annular portion 36a at a total of three locations, two in the axial direction and one in the radial direction, the possibility of entering the space 49 near the bearing is even lower. Become.
Moreover, the cooling effect equivalent to 4th Embodiment is acquired.

以上、本発明はこのような実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲において、種々の形態で実施することができる。
上記の実施形態では車両用交流発電機について説明したが、本発明の回転電機は、車両用以外の船舶用などの発電機、または電動機にももちろん利用できる。 As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.
Although the vehicle AC generator has been described in the above embodiment, the rotating electrical machine of the present invention can of course be used for a generator for a ship other than the vehicle, or an electric motor.

１：車両用交流発電機（回転電機）、２：固定子、２０：プーリ、３：回転子、３１：界磁巻線、３２：ポールコア、３３：回転軸、３４、３９：軸受け、３５、３６：冷却ファン、３６ａ：円環部、３６ｒ：原円環部、３６ｓ：端面、３６ｔ：外折縁部、３６ｕ：内折縁部、３７、３８：スリップリング、４：フレーム、４１：吸入窓、４２：吐出窓、４３：リブ、４４：軸受け収納部、４４ａ：基準端面、４４ｂ：凹段差面、４４ｃ：外向壁、４４ｄ：凸段差面、４４ｅ：内向壁、４４ｆ：凹溝、４４ｇ：溝底面、４４ｈ：外向溝壁、４４ｉ：内向溝壁、４４ｚ：外周面、４５：スプリングワッシャ、４９：軸受け近傍の空間、５：ブラシ装置、６：リアカバー、８０：エンジン   1: vehicle alternator (rotary electric machine), 2: stator, 20: pulley, 3: rotor, 31: field winding, 32: pole core, 33: rotating shaft, 34, 39: bearing, 35, 36: Cooling fan, 36a: Ring part, 36r: Original ring part, 36s: End face, 36t: Outer fold edge part, 36u: Inner fold edge part, 37, 38: Slip ring, 4: Frame, 41: Suction Window, 42: Discharge window, 43: Rib, 44: Bearing storage section, 44a: Reference end surface, 44b: Concave step surface, 44c: Outward wall, 44d: Convex step surface, 44e: Inward wall, 44f: Concave groove, 44g : Groove bottom surface, 44h: outward groove wall, 44i: inward groove wall, 44z: outer peripheral surface, 45: spring washer, 49: space near the bearing, 5: brush device, 6: rear cover, 80: engine

Claims (6)

巻線が巻回される固定子と、
前記固定子の径方向内側に回転可能に配置される回転子と、
前記回転子の磁極の軸方向端面に配置されて前記回転子とともに回転する冷却ファンと、
前記冷却ファンの径方向内側にて軸方向に曲げられて形成され、当該冷却ファンから軸方向に延びる円環部と、
前記回転子を回転可能に支持する軸受けと、
前記軸受けを保持する軸受け収納部が設けられるフレームと、
を備え、
前記軸受け収納部は、外周面が径方向外側に広げられ、前記回転子の軸方向かつ径方向に前記円環部と重複することを特徴とする回転電機。 A stator around which the winding is wound;
A rotor disposed rotatably inside the stator in the radial direction;
A cooling fan that is disposed on an axial end face of the magnetic pole of the rotor and rotates together with the rotor;
An annular portion formed by being bent in the axial direction on the radially inner side of the cooling fan, and extending in the axial direction from the cooling fan;
A bearing that rotatably supports the rotor;
A frame provided with a bearing housing for holding the bearing;
With
The rotating electrical machine characterized in that an outer peripheral surface of the bearing housing portion is widened radially outward and overlaps the annular portion in the axial direction and the radial direction of the rotor. 前記軸受け収納部は、
前記円環部側の端面である基準端面と、
前記基準端面の径方向外側に位置し、前記基準端面に対し前記円環部と反対側に形成される凹段差面と、
径方向外側に面して周方向に形成され、前記基準端面と前記凹段差面とを接続する外向壁と、
を有し、
前記凹段差面が前記円環部と径方向に重複し、前記外向壁が前記円環部と軸方向に重複することを特徴とする請求項１に記載の回転電機。 The bearing storage part
A reference end face which is an end face on the annular portion side;
A concave step surface which is located on the outer side in the radial direction of the reference end surface and is formed on the opposite side of the annular portion with respect to the reference end surface;
An outward wall formed in the circumferential direction facing the radially outer side and connecting the reference end surface and the concave step surface;
Have
2. The rotating electrical machine according to claim 1, wherein the concave step surface overlaps with the annular portion in a radial direction, and the outward wall overlaps with the annular portion in an axial direction. 前記円環部は径方向外側に曲折して外折縁部を形成し、前記凹段差面が該外折縁部と径方向に重複することを特徴とする請求項２に記載の回転電機。   The rotating electrical machine according to claim 2, wherein the annular portion is bent radially outward to form an outer folding edge, and the concave stepped surface overlaps the outer folding edge in the radial direction. 前記円環部は径方向内側に曲折して内折縁部を形成し、前記凹段差面が該内折縁部と径方向に重複することを特徴とする請求項２に記載の回転電機。   3. The rotating electrical machine according to claim 2, wherein the annular portion is bent radially inward to form an inner folding edge portion, and the concave step surface overlaps the inner folding edge portion in the radial direction. 前記軸受け収納部は、
前記円環部側の端面である基準端面と、
前記基準端面および前記円環部の径方向外側に位置し、前記基準端面に対し前記円環部側に形成される凸段差面と、
径方向内側に面して周方向に形成され、前記基準端面と前記凸段差面とを接続する内向壁と、
を有し、
前記基準端面が前記円環部と径方向に重複し、前記内向壁が前記円環部と軸方向に重複することを特徴とする請求項１に記載の回転電機。 The bearing storage part
A reference end face which is an end face on the annular portion side;
A convex stepped surface that is located on the outer side in the radial direction of the reference end surface and the annular portion and is formed on the annular portion side with respect to the reference end surface;
An inward wall that faces the radially inner side and is formed in the circumferential direction, connecting the reference end surface and the convex step surface;
Have
2. The rotating electrical machine according to claim 1, wherein the reference end surface overlaps with the annular portion in a radial direction, and the inward wall overlaps with the annular portion in an axial direction. 前記軸受け収納部は、
前記円環部側の端面である基準端面と、
前記基準端面の径方向外側に位置し、前記基準端面に対し前記円環部と反対側に形成される凹溝と、
を有し、
前記凹溝の溝底面が前記円環部と径方向に重複し、前記凹溝の径方向内側に周方向に形成される外向溝壁と前記凹溝の径方向外側に周方向に形成される内向溝壁とが前記円環部と軸方向に重複することを特徴とする請求項１に記載の回転電機。 The bearing storage part
A reference end face which is an end face on the annular portion side;
A ditch formed on the outer side in the radial direction of the reference end surface and formed on the opposite side of the annular portion with respect to the reference end surface;
Have
The groove bottom surface of the concave groove overlaps with the annular portion in the radial direction, and is formed in the circumferential direction on the radially outer side of the groove and the outward groove wall formed in the radial direction inside the concave groove. The rotating electrical machine according to claim 1, wherein an inward groove wall overlaps the annular portion in the axial direction.
JP2010028978A 2010-02-12 2010-02-12 Rotating electric machine Expired - Fee Related JP5288284B2 (en)

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