JP2020171179A - Rotary electric machine - Google Patents

Rotary electric machine Download PDF

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Publication number
JP2020171179A
JP2020171179A JP2019072877A JP2019072877A JP2020171179A JP 2020171179 A JP2020171179 A JP 2020171179A JP 2019072877 A JP2019072877 A JP 2019072877A JP 2019072877 A JP2019072877 A JP 2019072877A JP 2020171179 A JP2020171179 A JP 2020171179A
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Prior art keywords
insulating
heat sink
main body
electrode heat
height
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JP2019072877A
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JP7234757B2 (en
Inventor
秀俊 水野
Hidetoshi Mizuno
秀俊 水野
雅敏 甲村
Masatoshi Komura
甲村　　雅敏
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Denso Corp
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Denso Corp
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Priority to JP2019072877A priority Critical patent/JP7234757B2/en
Priority to DE102020109333.0A priority patent/DE102020109333A1/en
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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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/227—Heat sinks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • H02K11/05—Rectifiers associated with casings, enclosures or brackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • 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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/243—Rotor cores with salient poles ; Variable reluctance rotors of the claw-pole type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Rectifiers (AREA)

Abstract

To provide a rotary electric machine capable of preventing electric leakage due to water droplets adhering between a positive electrode heat sink and a fastening member.SOLUTION: A positive electrode heat sink 3 of a rectifier 31 included in a rotary electric machine 101 includes a main body 41 to which a positive electrode diode is fixed, and a fastening portion 42 formed with a step on an outer peripheral wall 44 of the main body 41 so as to be closer to a negative electrode heat sink 5 than the main body 41. A screw 6 is inserted into the fastening portion 42 of the positive electrode heat sink 3 so as to reach the negative electrode heat sink 5 from the rear cover 25 side. The height H3 of a screw head 51 is lower than the height H1 of the outer peripheral wall 44 of the main body 42. An insulating wall portion 57 of an insulating member 61 is formed such that the height H2 on the side of the main body 42 facing the outer peripheral wall 44 is the highest and higher than the height of the screw head 51. A gap 59 is formed between the rectifier 31 and the rear cover 25 such that liquid that has entered the rear cover 25 can be discharged.SELECTED DRAWING: Figure 2

Description

本発明は、回転電機に関する。 The present invention relates to a rotary electric machine.

従来、例えば特許文献１に記載されるように、電力を供給すると回転トルクを発生し、回転トルクが作用すると電力を発生する回転電機が知られている。この回転電機には、発電された交流を直流に変換するためのレクチファイヤが設けられている。レクチファイヤは、マイナス側ダイオードが固定されるフレームまたはマイナスフィンと、プラス側ダイオードが固定されるプラスフィンとを有し、リアカバーにより覆われている。 Conventionally, as described in, for example, Patent Document 1, there is known a rotary electric machine that generates a rotational torque when an electric power is supplied and generates an electric power when the rotational torque acts. This rotary electric machine is provided with a rectifier for converting the generated alternating current into direct current. The rectifier has a frame or a minus fin to which the minus side diode is fixed and a plus fin to which the plus side diode is fixed, and is covered by a rear cover.

プラス電位を持つプラスフィンは、グランド電位であるマイナスフィンまたはフレームと絶縁体を介してねじにより固定されている。フレーム固定用のねじは、グランド電位を持つフレームと締結されることでグランド電位となるため、ねじ頭部がプラスフィンに接触しないように、樹脂製の絶縁壁を供えた絶縁ワッシャを介して両フレームがねじ止めされている。 The positive fin having a positive potential is fixed by a screw to the negative fin having a positive potential or a frame via an insulator. Since the screw for fixing the frame becomes the ground potential by being fastened to the frame having the ground potential, both of them are passed through an insulating washer provided with a resin insulating wall so that the screw head does not come into contact with the plus fin. The frame is screwed.

ＤＥ１０２０１３２１７８２１号公報DE102013217821A

ところが、ねじ頭部を覆う絶縁壁の高さが、ねじ頭部高さより低い、または同じ程度であると、被液してリアカバー内に通風孔から雨水などが浸入した際に、プラスフィンとねじ頭部の間に付着した液体が溜まってしまい、漏電する虞れが生じていた。 However, if the height of the insulating wall covering the screw head is lower than or about the same as the height of the screw head, the Phillips fin and the screw will be screwed when the liquid is applied and rainwater or the like enters the rear cover through the ventilation holes. The liquid adhering between the heads accumulated, and there was a risk of electric leakage.

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、正極ヒートシンクと締結部材との間に水滴が付着することによる漏電を防止することが可能な回転電機を提供することにある。 The present invention has been created in view of these points, and an object of the present invention is to provide a rotary electric machine capable of preventing electric leakage due to water droplets adhering between a positive electrode heat sink and a fastening member. There is.

本発明の回転電機は、シャフト（１１）と、シャフトに固定されたロータ（１２）と、ロータの径方向外側に設けられ、ロータの回転に伴い交流電流を生じさせるステータ（１３）と、ロータ及びステータを外周側で保持するフレーム（１４，１５）と、フレームの外側に固定され、ステータで生じた交流電流を整流するレクチファイヤ（３１，３２，３３，３５，３６，３７）と、レクチファイヤを覆うように設けられるリアカバー（２５）と、を備える。 The rotary electric machine of the present invention includes a shaft (11), a rotor (12) fixed to the shaft, a stator (13) provided on the radial outer side of the rotor and generating an alternating current as the rotor rotates, and a rotor. A frame (14, 15) that holds the stator on the outer peripheral side, a rectifier (31, 32, 33, 35, 36, 37) that is fixed to the outside of the frame and rectifies the alternating current generated by the stator, and a rectifier. It includes a rear cover (25) provided so as to cover the fire.

レクチファイヤは、グランド側に接続される負極整流素子（４）と、負極整流素子が固定される負極ヒートシンク（５）と、電源側に接続される正極整流素子（２）と、正極ヒートシンク（３）と、締結部材（６）と、絶縁部材（６１，６２，６３，６４，６５，６６，６７）と、を有する。正極ヒートシンクは、負極ヒートシンクとリアカバーとの間に負極ヒートシンクと離間した状態で対向配置され、正極整流素子が固定される本体部（４１）、本体部よりも負極ヒートシンクに近い位置となるように本体部の外周壁（４４）に本体部と段差を有して形成される締結部（４２）、を含む。 The rectifier includes a negative electrode rectifying element (4) connected to the ground side, a negative electrode heat sink (5) to which the negative electrode rectifying element is fixed, a positive electrode rectifying element (2) connected to the power supply side, and a positive electrode heat sink (3). ), A fastening member (6), and an insulating member (61,62,63,64,65,66,67). The positive electrode heat sink is arranged between the negative electrode heat sink and the rear cover in a state of being separated from the negative electrode heat sink, and the main body portion (41) to which the positive electrode rectifying element is fixed is located closer to the negative electrode heat sink than the main body portion. The outer peripheral wall (44) of the portion includes a fastening portion (42) formed with a step from the main body portion.

締結部材（６）は、正極ヒートシンクの締結部にリアカバー側から締結部を挿通して負極ヒートシンクまで到達するように挿入され、正極ヒートシンクと負極ヒートシンクとの離間部分に設けられるシンク間絶縁部（７，７４）を介して正極ヒートシンクと負極ヒートシンクとを締結する部材であって、締結部からリアカバー側へ突出する突出部（５１）の高さ（Ｈ３）が本体部の外周壁の高さ（Ｈ１）よりも低い。 The fastening member (6) is inserted into the fastening portion of the positive electrode heat sink so as to reach the negative electrode heat sink through the fastening portion from the rear cover side, and the inter-sink insulating portion (7) provided at a separated portion between the positive electrode heat sink and the negative electrode heat sink. , 74) is a member for fastening the positive electrode heat sink and the negative electrode heat sink, and the height (H3) of the protruding portion (51) protruding from the fastening portion toward the rear cover side is the height (H1) of the outer peripheral wall of the main body portion. ) Is lower.

絶縁部材は、締結部材の突出部を覆う容器状の部材であって、締結部材が挿入される穴（５８）が形成され、締結部材の突出部と締結部との間に位置する絶縁底部（５６，７２，８６）、絶縁底部の外縁に連続し締結部材の突出部の外周を覆う絶縁壁部（５７，７３，７５，８２，８４，８７）、を有し、絶縁壁部は、本体部の外周壁に対向する側の高さ（Ｈ２）が最も高くかつ締結部材の突出部の高さよりも高く形成されている。レクチファイヤとリアカバーとの間にはリアカバー内に浸入した液体を排出可能とする隙間（５９）が形成されている。 The insulating member is a container-shaped member that covers the protruding portion of the fastening member, and a hole (58) into which the fastening member is inserted is formed, and the insulating bottom portion (58) located between the protruding portion of the fastening member and the fastening portion (the insulating bottom portion). 56,72,86), an insulating wall portion (57,73,75,82,84,87) that is continuous with the outer edge of the insulating bottom and covers the outer periphery of the protruding portion of the fastening member, and the insulating wall portion is the main body. The height (H2) on the side facing the outer peripheral wall of the portion is the highest and is formed higher than the height of the protruding portion of the fastening member. A gap (59) is formed between the rectifier and the rear cover so that the liquid that has entered the rear cover can be discharged.

本発明の構成によれば、回転電機が被液してリアカバー内に雨水などが浸入し、締結部材の突出部に水滴が付着しても、正極ヒートシンクの本体部側の絶縁壁部の高さが最も高く、かつ、突出部の高さよりも高く形成されているため、突出部と本体部との間で水滴による漏電経路が形成されにくい。 According to the configuration of the present invention, the height of the insulating wall on the main body side of the positive electrode heat sink even if the rotating electric machine is exposed to liquid and rainwater or the like infiltrates into the rear cover and water droplets adhere to the protruding portion of the fastening member. Is the highest and is formed higher than the height of the protruding portion, so that it is difficult to form an electric leakage path due to water droplets between the protruding portion and the main body portion.

また、締結部材の突出部に付着した水滴が徐々に溜まった場合でも、絶縁壁部において本体部の外周壁に対向する部位以外の高さが低い部位から、水滴は、隙間を経由してリアカバーの外へ排水される。よって、締結部材の突出部と正極ヒートシンクの外周壁との間で漏電経路が形成されることが効果的に抑制され、漏電を防止することができる。 Further, even if water droplets adhering to the protruding portion of the fastening member are gradually accumulated, the water droplets from the low height portion other than the portion of the insulating wall portion facing the outer peripheral wall of the main body portion pass through the gap to the rear cover. It is drained to the outside of. Therefore, it is possible to effectively suppress the formation of an electric leakage path between the protruding portion of the fastening member and the outer peripheral wall of the positive electrode heat sink, and prevent electric leakage.

第１実施形態による回転電機の軸方向断面図である。It is sectional drawing in the axial direction of the rotary electric machine according to 1st Embodiment. 図１のＩＩ部分の拡大図であり、レクチファイヤを示す断面図である。FIG. 1 is an enlarged view of a portion II of FIG. 1, and is a cross-sectional view showing a rectifier. 回転電機の主に正極ヒートシンクを示す斜視図であって、さらにねじ、絶縁部材、シンク間絶縁部の配置を示す図である。It is a perspective view which mainly shows the positive electrode heat sink of a rotary electric machine, and is also the figure which shows the arrangement of a screw, an insulating member, and an insulating part between sinks. 絶縁部材の斜視図である。It is a perspective view of an insulating member. 第２実施形態による回転電機が備えるレクチファイヤの一部を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a part of a rectifier included in the rotary electric machine according to the second embodiment. 第２実施形態による絶縁部材の斜視図である。It is a perspective view of the insulating member according to 2nd Embodiment. 第３実施形態による回転電機が備えるレクチファイヤの一部を示す軸方向断面図である。It is an axial sectional view which shows a part of the rectifier provided in the rotary electric machine according to 3rd Embodiment. 第４実施形態による絶縁部材を示す斜視図である。It is a perspective view which shows the insulating member by 4th Embodiment. 第５実施形態による回転電機が備えるレクチファイヤの一部を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a part of a rectifier included in the rotary electric machine according to the fifth embodiment. 第６実施形態による回転電機が備えるレクチファイヤの一部を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a part of a rectifier included in the rotary electric machine according to the sixth embodiment. 図１０のＸＩ−ＸＩ線断面図であり、リアカバーと絶縁部材とを示す図である。FIG. 10 is a sectional view taken along line XI-XI of FIG. 10, showing a rear cover and an insulating member. 第７実施形態による回転電機が備えるレクチファイヤの一部を示す軸方向断面図である。FIG. 5 is an axial sectional view showing a part of a rectifier included in the rotary electric machine according to the seventh embodiment. その他の実施形態による絶縁部材を示す斜視図である。It is a perspective view which shows the insulating member by another embodiment. その他の実施形態による絶縁部材を示す斜視図である。It is a perspective view which shows the insulating member by another embodiment. その他の実施形態による絶縁部材を示す部分断面図である。It is a partial cross-sectional view which shows the insulating member by another embodiment. その他の実施形態による絶縁部材を示す部分断面図である。It is a partial cross-sectional view which shows the insulating member by another embodiment. その他の実施形態による絶縁部材を示す部分断面図である。It is a partial cross-sectional view which shows the insulating member by another embodiment. その他の実施形態による絶縁部材を示す部分断面図である。It is a partial cross-sectional view which shows the insulating member by another embodiment.

以下、本発明の複数の実施形態を図面に基づいて説明する。なお、以下の複数の実施形態において、実質的に同様の構成には同じ符号を付し、説明を省略する。
〈第１実施形態〉
［構成］
第１実施形態の構成について、図１〜図４を参照しつつ説明する。第１実施形態の回転電機１０１は、図示しない車両用エンジンの出力軸にベルト等の連結部材を介して連結された、いわゆるオルタネータである。図１に示すように、回転電機１０１は、シャフト１１に固定されたランデル型のロータ１２と、ロータ１２を包囲する位置に設けられるステータ１３と、これらロータ１２及びステータ１３を保持する金属製のフレーム１４，１５とを備えている。 Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the following plurality of embodiments, substantially the same configurations are designated by the same reference numerals, and the description thereof will be omitted.
<First Embodiment>
[Constitution]
The configuration of the first embodiment will be described with reference to FIGS. 1 to 4. The rotary electric machine 101 of the first embodiment is a so-called alternator connected to an output shaft of a vehicle engine (not shown) via a connecting member such as a belt. As shown in FIG. 1, the rotary electric machine 101 is made of a Randell type rotor 12 fixed to a shaft 11, a stator 13 provided at a position surrounding the rotor 12, and a metal holder for the rotor 12 and the stator 13. It includes frames 14 and 15.

ロータ１２は、ロータコア１６と、ロータ巻線１７とを有している。ロータ巻線１７は、絶縁処理された銅線であって、ロータコア１６に巻回されている。ロータ１２は、ロータ巻線１７に電流が流れることで磁極を形成する。ステータ１３は、ロータ１２の径方向外側に設けられ、ステータコア１８、及び、ステータコア１８に形成された複数個のスロットに所定の間隔で巻回されているステータ巻線１９を有している。ステータ１３は、ロータ１２が発生する磁束と鎖交することで交流を発生可能である。 The rotor 12 has a rotor core 16 and a rotor winding 17. The rotor winding 17 is an insulated copper wire, which is wound around a rotor core 16. The rotor 12 forms a magnetic pole when a current flows through the rotor winding 17. The stator 13 is provided on the radial outer side of the rotor 12, and has a stator core 18 and a stator winding 19 wound around a plurality of slots formed in the stator core 18 at predetermined intervals. The stator 13 can generate alternating current by interlinking with the magnetic flux generated by the rotor 12.

フレームは、シャフト１１の軸方向に並ぶフロントフレーム１４とリアフレーム１５とで構成され、これら各フレーム１４，１５はスルーボルトの締結により一体化されている。なお、以降の説明において、単に「軸方向」と言う場合には、シャフト１１の軸方向を意味するものとする。ステータ１３は、フロントフレーム１４及びリアフレーム１５に挟持された状態で固定されている。フレーム１４，１５には軸受け２１，２２が設けられ、この軸受け２１，２２によりシャフト１１及びロータ１２が回転自在に支持されている。シャフト１１の一端側（フロントフレーム１４側）にはプーリ２３が取り付けられている。 The frame is composed of a front frame 14 and a rear frame 15 arranged in the axial direction of the shaft 11, and the frames 14 and 15 are integrated by fastening through bolts. In the following description, when the term "axial direction" is simply used, it means the axial direction of the shaft 11. The stator 13 is fixed to the front frame 14 and the rear frame 15 in a sandwiched state. Bearings 21 and 22 are provided on the frames 14 and 15, and the shaft 11 and the rotor 12 are rotatably supported by the bearings 21 and 22. A pulley 23 is attached to one end side (front frame 14 side) of the shaft 11.

軸方向においてリアフレーム１５の外側には、絶縁カバーとして合成樹脂製のリアカバー２５が固定して取り付けられている。リアフレーム１５とリアカバー２５との間に形成された空間部Ｓには、回転電機１０１で生じた交流電流を整流する整流器としてレクチファイヤ３１が収容されている。なお、空間部Ｓには、レクチファイヤ３１以外に、図示しないレギュレータや界磁コイル通電機構が収容されている。 A synthetic resin rear cover 25 is fixedly attached to the outside of the rear frame 15 in the axial direction as an insulating cover. A rectifier 31 is housed in the space S formed between the rear frame 15 and the rear cover 25 as a rectifier for rectifying the alternating current generated by the rotary electric machine 101. In addition to the rectifier 31, a regulator and a field coil energization mechanism (not shown) are housed in the space S.

リアカバー２５は、レクチファイヤ３１を覆うようにしてリアフレーム１５の軸方向外側に設けられる部材であり、天板部２６と、その外周部から延びる周壁部２７とを有している。リアカバー２５は、ナイロンとエラストマとの混合材等、耐衝撃材により形成されているとよい。リアカバー２５は、天板部２６において複数の図示しない固定具の締結によりリアフレーム１５に対して固定されている。周壁部２７は、以下詳述する正極ヒートシンク３と負極ヒートシンク５とが並ぶ方向（すなわちシャフト１１の軸方向）に延びるように設けられている。 The rear cover 25 is a member provided on the outer side in the axial direction of the rear frame 15 so as to cover the rectifier 31, and has a top plate portion 26 and a peripheral wall portion 27 extending from the outer peripheral portion thereof. The rear cover 25 is preferably formed of an impact resistant material such as a mixed material of nylon and elastomer. The rear cover 25 is fixed to the rear frame 15 by fastening a plurality of fixtures (not shown) on the top plate portion 26. The peripheral wall portion 27 is provided so as to extend in the direction in which the positive electrode heat sink 3 and the negative electrode heat sink 5 described in detail below are aligned (that is, in the axial direction of the shaft 11).

次に、レクチファイヤ３１の構成について詳しく説明する。レクチファイヤ３１は、正極ダイオード２、正極ヒートシンク３、負極ダイオード４、負極ヒートシンク５、ねじ６、絶縁部材６１、シンク間絶縁部７などを主に有している。正極ヒートシンク３は、リアフレーム１５の軸方向外側に設けられる。負極ヒートシンク５は、リアフレーム１５の一部を用いて構成される。正極ヒートシンク３及び負極ヒートシンク５は互いに離間している。 Next, the configuration of the rectifier 31 will be described in detail. The rectifier 31 mainly includes a positive electrode diode 2, a positive electrode heat sink 3, a negative electrode diode 4, a negative electrode heat sink 5, a screw 6, an insulating member 61, an inter-sink insulating portion 7, and the like. The positive electrode heat sink 3 is provided on the outer side in the axial direction of the rear frame 15. The negative electrode heat sink 5 is configured by using a part of the rear frame 15. The positive electrode heat sink 3 and the negative electrode heat sink 5 are separated from each other.

正極ヒートシンク３には、整流回路において電源（バッテリ）側に接続される複数の正極ダイオード２が固定されている。正極ダイオード２は正極整流素子に相当し、例えばツェナダイオードにより構成されている。正極ヒートシンク３は、金属材料よりなり、各正極ダイオード２と電源部との間に電気接続されることで正極に帯電される。 A plurality of positive electrode diodes 2 connected to the power supply (battery) side in the rectifier circuit are fixed to the positive electrode heat sink 3. The positive electrode diode 2 corresponds to a positive electrode rectifying element, and is composed of, for example, a Zener diode. The positive electrode heat sink 3 is made of a metal material, and the positive electrode is charged by being electrically connected between each positive electrode diode 2 and the power supply unit.

図２，図３に示すように、正極ヒートシンク３は、本体部４１と、締結部４２とを有している。本体部４１は、略円環状をなす板状部材であり、複数の正極ダイオード２が固定される。正極ダイオード２のリード線４３（図１参照）は、負極ヒートシンク５側を向いている。締結部４２は、本体部４１よりも負極ヒートシンク５に近い位置となるように本体部４１の外周壁４４に段差を有して形成されている。 As shown in FIGS. 2 and 3, the positive electrode heat sink 3 has a main body portion 41 and a fastening portion 42. The main body 41 is a plate-shaped member having a substantially annular shape, and a plurality of positive electrode diodes 2 are fixed to the main body 41. The lead wire 43 (see FIG. 1) of the positive electrode diode 2 faces the negative electrode heat sink 5 side. The fastening portion 42 is formed with a step on the outer peripheral wall 44 of the main body portion 41 so as to be closer to the negative electrode heat sink 5 than the main body portion 41.

以下、締結部４２のリアカバー２５側の端面４５からリアカバー２５側への軸方向における突出量を、単に「高さ」と言う。なお、「リアカバー２５側」とは、詳細にはリアカバー２５の天板部２６側を意味する。締結部４２のカバー側端面４５は、外周壁４４のカバー側端面４６よりも、負極ヒートシンク５に近い位置となっている。締結部４２には、ねじ挿入用の穴４７(図２参照)が貫通して形成されている。締結部４２は、本体部４１の外周壁４４に略等間隔に複数箇所（本実施形態では３箇所）形成されている。 Hereinafter, the amount of protrusion of the fastening portion 42 from the end surface 45 on the rear cover 25 side to the rear cover 25 side in the axial direction is simply referred to as "height". The "rear cover 25 side" specifically means the top plate portion 26 side of the rear cover 25. The cover-side end surface 45 of the fastening portion 42 is located closer to the negative electrode heat sink 5 than the cover-side end surface 46 of the outer peripheral wall 44. A hole 47 (see FIG. 2) for inserting a screw is formed through the fastening portion 42. A plurality of fastening portions 42 are formed on the outer peripheral wall 44 of the main body portion 41 at substantially equal intervals (three locations in the present embodiment).

ねじ６は、各ヒートシンク３，５を軸方向において締結する部材であり、締結部４２に対してリアカバー２５側から挿入される。ねじ６は、頭部５１と、軸部５２とを有している。締結状態において、頭部５１は、締結部４２からリアカバー２５側へ突出している。頭部５１は、「突出部」に相当する。頭部５１の突出先端は、本体部４１の外周壁４４におけるリアカバー２５側の端面４６よりも軸方向において負極ヒートシンク５寄りに位置している。すなわち、頭部５１の高さＨ３は、正極ヒートシンク３の外周壁４４の高さＨ１より低くなっている。ねじ６は、「締結部材」に相当する。 The screw 6 is a member that fastens the heat sinks 3 and 5 in the axial direction, and is inserted into the fastening portion 42 from the rear cover 25 side. The screw 6 has a head portion 51 and a shaft portion 52. In the fastened state, the head 51 projects from the fastened portion 42 toward the rear cover 25. The head 51 corresponds to a "protruding portion". The protruding tip of the head 51 is located closer to the negative electrode heat sink 5 in the axial direction than the end surface 46 on the rear cover 25 side of the outer peripheral wall 44 of the main body 41. That is, the height H3 of the head 51 is lower than the height H1 of the outer peripheral wall 44 of the positive electrode heat sink 3. The screw 6 corresponds to a "fastening member".

再び図１を参照する。負極ヒートシンク５には、整流回路においてグランド側に接続される複数の負極ダイオード４が固定されている。負極ダイオード４のリード線５３は、正極ヒートシンク３側を向いている。負極ダイオード４は負極整流素子に相当し、例えばツェナダイオードにより構成されている。負極ヒートシンク５は、リアフレーム１５の一部であり、かつ正極ヒートシンク３に対向する。負極ヒートシンク５、すなわちリアフレーム１５は、グランド電位となっており、正極ヒートシンク３に対して電位差を有している。なお、図２に示すように、ねじ軸部５２の挿入側先端は、負極ヒートシンク５に到達しており、ねじ６も同様にグランド電位となっている。 See FIG. 1 again. A plurality of negative electrode diodes 4 connected to the ground side in the rectifier circuit are fixed to the negative electrode heat sink 5. The lead wire 53 of the negative electrode diode 4 faces the positive electrode heat sink 3 side. The negative electrode diode 4 corresponds to a negative electrode rectifying element, and is composed of, for example, a Zener diode. The negative electrode heat sink 5 is a part of the rear frame 15 and faces the positive electrode heat sink 3. The negative electrode heat sink 5, that is, the rear frame 15 has a ground potential and has a potential difference with respect to the positive electrode heat sink 3. As shown in FIG. 2, the insertion-side tip of the screw shaft portion 52 reaches the negative electrode heat sink 5, and the screw 6 also has a ground potential.

シンク間絶縁部７は、例えば樹脂等の絶縁材料で形成され、ねじ軸部５２の外周に接してねじ６毎に設けられている。図２に示すように、シンク間絶縁部７は、大径部５４と、大径部５４と同軸に設けられる小径部５５と、を有している。大径部５４は、各ヒートシンク３，５が軸方向に離間している離間部分を埋めるように、また、小径部５５は、締結部４２の穴４７とねじ軸部５２との隙間を埋めるように設けられている。 The inter-sink insulating portion 7 is formed of an insulating material such as resin, and is provided for each screw 6 in contact with the outer periphery of the screw shaft portion 52. As shown in FIG. 2, the inter-sink insulating portion 7 has a large diameter portion 54 and a small diameter portion 55 provided coaxially with the large diameter portion 54. The large diameter portion 54 fills the separated portion where the heat sinks 3 and 5 are separated in the axial direction, and the small diameter portion 55 fills the gap between the hole 47 of the fastening portion 42 and the screw shaft portion 52. It is provided in.

絶縁部材６１は、ねじ頭部５１を覆う容器状の部材であり、例えば樹脂等の絶縁材料で形成されている。図４に示すように、絶縁部材６１は、その全体形状が、有底円筒部材を軸方向に斜めに交差する平面で切った形状をなしている。絶縁部材６１は、絶縁底部５６と、絶縁壁部５７と、を有している。絶縁底部５６の中央には、ねじ６が挿通する穴５８が形成されている。絶縁壁部５７は、絶縁底部５６の外縁から垂直方向に連続して形成されている。穴５８の径はねじ軸部５２の外径より大きく、締結時、穴５８とねじ軸部５２との間には僅かな隙間が形成される。 The insulating member 61 is a container-shaped member that covers the screw head 51, and is made of an insulating material such as resin. As shown in FIG. 4, the overall shape of the insulating member 61 is such that the bottomed cylindrical member is cut by a plane that intersects diagonally in the axial direction. The insulating member 61 has an insulating bottom portion 56 and an insulating wall portion 57. A hole 58 through which the screw 6 is inserted is formed in the center of the insulating bottom portion 56. The insulating wall portion 57 is formed continuously in the vertical direction from the outer edge of the insulating bottom portion 56. The diameter of the hole 58 is larger than the outer diameter of the screw shaft portion 52, and a slight gap is formed between the hole 58 and the screw shaft portion 52 at the time of fastening.

図２に示すように、組み付け時の状態において、絶縁底部５６は、ねじ頭部５１と締結部４２との間に位置している。絶縁壁部５７は、ねじ頭部５１の外周を覆っている。絶縁壁部５７は、本体部４１の外周壁４４に対向する側が最も高く、外周壁４４から外側へ離れていくほど徐々に低くなっている。また、絶縁部材６１は、ねじ頭部５１を覆うことが可能であって、かつ、締結部４２からはみ出さない程度の大きさに形成されている。 As shown in FIG. 2, the insulating bottom portion 56 is located between the screw head 51 and the fastening portion 42 in the assembled state. The insulating wall portion 57 covers the outer circumference of the screw head 51. The insulating wall portion 57 is highest on the side of the main body portion 41 facing the outer peripheral wall 44, and gradually decreases as the distance from the outer peripheral wall 44 increases. Further, the insulating member 61 is formed to have a size that can cover the screw head 51 and does not protrude from the fastening portion 42.

締結状態において、外周壁４４の高さＨ１、絶縁壁部５７において最も高い部位である外周壁４４に対向する側の高さＨ２、ねじ頭部５１の高さＨ３が、この順で高くなっている。また、絶縁部材６１、正極ヒートシンク３、及び負極ヒートシンク５の外周と、リアカバー２５の周壁部２７との間には、リアカバー２５内に浸入した液体を排出可能とする隙間５９が形成されている。この隙間５９は、図２において破線の矢印Ａ１で示す排水経路を形成する。 In the fastened state, the height H1 of the outer peripheral wall 44, the height H2 of the side facing the outer peripheral wall 44, which is the highest portion of the insulating wall portion 57, and the height H3 of the screw head 51 increase in this order. There is. Further, a gap 59 is formed between the outer periphery of the insulating member 61, the positive electrode heat sink 3, and the negative electrode heat sink 5 and the peripheral wall portion 27 of the rear cover 25 so that the liquid that has penetrated into the rear cover 25 can be discharged. The gap 59 forms a drainage path indicated by the broken line arrow A1 in FIG.

［効果］
（１）本実施形態では、回転電機１０１が被液してリアカバー２５内に通風孔から雨水などが浸入し、ねじ頭部５１に水滴が付着しても、正極ヒートシンク３の本体部４１側の絶縁壁部５７の高さＨ２が、ねじ頭部５１の高さＨ３よりも高いため、ねじ頭部５１と本体部４１との間で水滴による漏電経路が形成されにくい。 [effect]
(1) In the present embodiment, even if the rotary electric machine 101 is exposed to liquid and rainwater or the like enters the rear cover 25 from the ventilation holes and water droplets adhere to the screw head 51, the positive heat sink 3 is on the main body 41 side. Since the height H2 of the insulating wall portion 57 is higher than the height H3 of the screw head portion 51, it is difficult to form a leakage path due to water droplets between the screw head portion 51 and the main body portion 41.

また、ねじ頭部５１に付着した水滴が徐々に溜まった場合でも、絶縁壁部５７の低くなっている側から、つまり正極ヒートシンク３の外周から隙間５９等の排水経路を通って、水滴はリアカバー２５の外へ排水される。よって、ねじ頭部５１と正極ヒートシンク３の外周壁４４との間で漏電経路が形成されることが効果的に抑制され、漏電を防止することができる。 Further, even when water droplets adhering to the screw head 51 gradually accumulate, the water droplets pass through a drainage path such as a gap 59 from the lower side of the insulating wall portion 57, that is, from the outer circumference of the positive electrode heat sink 3, and the water droplets are rear-covered. It is drained to the outside of 25. Therefore, it is possible to effectively suppress the formation of an electric leakage path between the screw head 51 and the outer peripheral wall 44 of the positive electrode heat sink 3, and prevent electric leakage.

仮に、ねじ頭部５１を覆う絶縁部材６１の絶縁壁部５７の高さＨ２が、ねじ頭部５１の高さＨ３より低い、または同じ程度であると、絶縁壁部５７とねじ頭部５１との間に付着した液体が溜まってしまい、漏電経路が形成され漏電する虞れが生ずるが、本実施形態ではそうした問題を回避することができる。 If the height H2 of the insulating wall portion 57 of the insulating member 61 covering the screw head 51 is lower than or about the same as the height H3 of the screw head 51, the insulating wall portion 57 and the screw head 51 The liquid adhering to the space is accumulated, and a leakage path is formed, which may cause an electric leakage. However, in the present embodiment, such a problem can be avoided.

なお、ねじ頭部５１の高さＨ３を、本体部４１の外周壁４４の高さＨ１より高くなるように固定すれば、水滴による漏電経路は形成されにくくなるが、ねじ頭部５１が本体部４１よりリアカバー２５側に飛び出すことになり、回転電機１０１自体の軸方向長さが長くなり装置が大型化するという問題が生じる。しかし、本実施形態では、装置全体はコンパクトに維持したまま、ねじ頭部５１に水が溜まらない構成とすることができる。 If the height H3 of the screw head 51 is fixed so as to be higher than the height H1 of the outer peripheral wall 44 of the main body 41, it becomes difficult to form an electric leakage path due to water droplets, but the screw head 51 is the main body. Since it protrudes from 41 to the rear cover 25 side, there arises a problem that the axial length of the rotary electric machine 101 itself becomes long and the device becomes large. However, in the present embodiment, the entire device can be kept compact and water does not collect on the screw head 51.

（２）また、ねじ頭部５１周辺に長期間水滴が溜まることがないため、ねじ６や周辺部材の水による腐食を抑制することができる。 (2) Further, since water droplets do not collect around the screw head 51 for a long period of time, corrosion of the screw 6 and peripheral members by water can be suppressed.

（３）本実施形態の絶縁部材６１は、絶縁底部５６と絶縁壁部５７とを有し、有底円筒部材を軸方向に斜めに交差する平面で切った形状をなしている。このように、簡易な構成であるため、製造が容易であり、組み付けも容易である。 (3) The insulating member 61 of the present embodiment has an insulating bottom portion 56 and an insulating wall portion 57, and has a shape in which a bottomed cylindrical member is cut by a plane that intersects diagonally in the axial direction. As described above, since it has a simple structure, it is easy to manufacture and easy to assemble.

〈第２実施形態〉
次に、第２実施形態の回転電機１０２について、図５、図６を参照して説明する。第２実施形態では、第１実施形態の回転電機１０１に対し、絶縁部材の構成が異なる。第２実施形態のレクチファイヤ３２が備える絶縁部材６２は、絶縁底部５６の外周の一部分から負極ヒートシンク５側へ軸方向に延びて形成される延設部７１をさらに有している。延設部７１は、正極ヒートシンク３の締結部４２の外周を覆うように曲面状に形成されている。すなわち、締結部４２の外周が排水経路に露出しない構成となっている。 <Second Embodiment>
Next, the rotary electric machine 102 of the second embodiment will be described with reference to FIGS. 5 and 6. In the second embodiment, the configuration of the insulating member is different from that of the rotary electric machine 101 of the first embodiment. The insulating member 62 included in the rectifier 32 of the second embodiment further has an extending portion 71 formed so as to extend axially from a part of the outer periphery of the insulating bottom portion 56 toward the negative electrode heat sink 5. The extending portion 71 is formed in a curved surface shape so as to cover the outer periphery of the fastening portion 42 of the positive electrode heat sink 3. That is, the outer circumference of the fastening portion 42 is not exposed to the drainage path.

本実施形態によれば、上記第１実施形態と同様の効果を奏し、さらに、正極ヒートシンク３の締結部４２の外周が排水経路に露出しないため、大量に排水する際に、グランド電位のねじ６と正極ヒートシンク３の露出部とで漏電することが抑制される。 According to the present embodiment, the same effect as that of the first embodiment is obtained, and further, since the outer periphery of the fastening portion 42 of the positive electrode heat sink 3 is not exposed to the drainage path, the ground potential screw 6 is used when a large amount of drainage is performed. Leakage between the and the exposed portion of the positive electrode heat sink 3 is suppressed.

〈第３実施形態〉
次に、第３実施形態の回転電機１０３について、図７を参照して説明する。第３実施形態では、第２実施形態の回転電機１０２に対し、絶縁部材の構成が異なる。第３実施形態のレクチファイヤ３３が備える絶縁部材６３は、絶縁底部７２、絶縁壁部７３、延設部７１、及びシンク間絶縁部７４を有している。すなわち、絶縁部材６３は、シンク間絶縁部７４と一体に形成されている。本実施形態の絶縁部材６３は、正極ヒートシンク３の締結部４２の外周側から、締結部４２に嵌め込むことで組み付けされる。 <Third Embodiment>
Next, the rotary electric machine 103 of the third embodiment will be described with reference to FIG. 7. In the third embodiment, the configuration of the insulating member is different from that of the rotary electric machine 102 of the second embodiment. The insulating member 63 included in the rectifier 33 of the third embodiment has an insulating bottom portion 72, an insulating wall portion 73, an extension portion 71, and an inter-sink insulating portion 74. That is, the insulating member 63 is integrally formed with the inter-sink insulating portion 74. The insulating member 63 of the present embodiment is assembled by fitting it into the fastening portion 42 from the outer peripheral side of the fastening portion 42 of the positive electrode heat sink 3.

本実施形態によれば、上記第２実施形態と同様の効果を奏し、さらに、シート間絶縁部が別体である場合と比較すると、両絶縁体部の間に隙間が生じ得ないため、隙間からの浸水による漏電を抑制することができる。 According to the present embodiment, the same effect as that of the second embodiment is obtained, and further, as compared with the case where the insulating portion between sheets is a separate body, a gap cannot be generated between both insulating portions, so that a gap is formed. Leakage due to flooding from the water can be suppressed.

〈第４実施形態〉
次に、第４実施形態の絶縁部材６４について、図８を参照して説明する。第４実施形態の絶縁部材６４の絶縁壁部７５は、壁高一定部７６と、段差部７７とを有している。壁高一定部７６は、円筒状をなし、その高さＨ２がねじ頭部５１の高さＨ３（図２参照）より高い高さで一定に形成されている。段差部７７は、絶縁底部５６とは反対側の端部から絶縁底部５６側へ絶縁壁部７５の一部を方形状に切り欠いて形成されている。段差部７７の高さＨ４は、壁高一定部の高さＨ２の概ね３分の１程度である。 <Fourth Embodiment>
Next, the insulating member 64 of the fourth embodiment will be described with reference to FIG. The insulating wall portion 75 of the insulating member 64 of the fourth embodiment has a wall height constant portion 76 and a step portion 77. The wall height constant portion 76 has a cylindrical shape, and its height H2 is formed to be constant at a height higher than the height H3 of the screw head 51 (see FIG. 2). The step portion 77 is formed by cutting out a part of the insulating wall portion 75 in a square shape from the end portion on the side opposite to the insulating bottom portion 56 to the insulating bottom portion 56 side. The height H4 of the step portion 77 is approximately one-third of the height H2 of the constant wall height portion.

上記絶縁部材６４は、壁高一定部７６が本体部４１の外周壁４４に対向し、かつ、段差部７７が、本体部４１の外周壁４４に対向する側から離れた位置であって外周壁４４に対向しない位置となるように、ねじ頭部５１の外周に上記各実施形態と同様に設けられる。こうした絶縁部材６４の取り付け状態は、上記各実施形態と同様であるため図面は省略する。 In the insulating member 64, the wall height constant portion 76 faces the outer peripheral wall 44 of the main body 41, and the stepped portion 77 is located away from the side of the main body 41 facing the outer peripheral wall 44. Similar to each of the above embodiments, the screw head 51 is provided on the outer circumference of the screw head 51 so as not to face the 44. Since the mounting state of the insulating member 64 is the same as that of each of the above embodiments, the drawings will be omitted.

本実施形態によれば、上記第１実施形態の効果（１）、（２）と同様の効果を奏し、さらに、大量に被液した際には、段差部７７が排水出口として機能するため、より排水効果が高まり漏電経路が形成される可能性を低くすることができる。 According to the present embodiment, the same effects as those of the first embodiment (1) and (2) are exhibited, and when a large amount of liquid is applied, the step portion 77 functions as a drainage outlet. The drainage effect is enhanced and the possibility of forming an electric leakage path can be reduced.

〈第５実施形態〉
次に、第５実施形態の回転電機１０５について、図９を参照して説明する。第５実施形態では、第１実施形態の回転電機１０１に対し、絶縁部材の構成が異なる。第５実施形態のレクチファイヤ３５が備える絶縁部材６５は、カバー側絶縁部７９と、ねじ側絶縁部８１とで構成されている。ねじ側絶縁部８１は、「締結部材側絶縁部」に相当する。 <Fifth Embodiment>
Next, the rotary electric machine 105 of the fifth embodiment will be described with reference to FIG. In the fifth embodiment, the configuration of the insulating member is different from that of the rotary electric machine 101 of the first embodiment. The insulating member 65 included in the rectifier 35 of the fifth embodiment is composed of a cover-side insulating portion 79 and a screw-side insulating portion 81. The screw-side insulating portion 81 corresponds to the "fastening member-side insulating portion".

カバー側絶縁部７９は、リアカバー２５の天板部２６から締結部４２に向けて、概ね、ねじ頭部５１の高さ位置まで延びて、リアカバー２５と一体に形成されており、円筒形状をなしている。ねじ側絶縁部８１は、有底円筒形状をなしている。そして、カバー側絶縁部７９のねじ側端部と、ねじ側絶縁部８１のリアカバー側端部とが、例えばシリコン接着剤等の弾性を有する接着剤により固定されて一体に形成されている。 The cover-side insulating portion 79 extends from the top plate portion 26 of the rear cover 25 toward the fastening portion 42 to the height position of the screw head 51, and is integrally formed with the rear cover 25 to form a cylindrical shape. ing. The screw side insulating portion 81 has a bottomed cylindrical shape. The screw-side end of the cover-side insulating portion 79 and the rear cover-side end of the screw-side insulating portion 81 are integrally formed by being fixed by an elastic adhesive such as a silicon adhesive.

本実施形態では、ねじ側絶縁部８１の底部が、絶縁底部５６を構成する。そして、ねじ側絶縁部８１の円筒状の外周壁とカバー側絶縁部７９の円筒状の外周壁とで、絶縁壁部８２が構成されている。なお、本実施形態では、絶縁壁部８２において本体部４１の外周壁４４に対向する側の高さＨ２は、外周壁４４の高さＨ１よりも高くなっている。 In the present embodiment, the bottom portion of the screw side insulating portion 81 constitutes the insulating bottom portion 56. The insulating wall portion 82 is formed by the cylindrical outer peripheral wall of the screw-side insulating portion 81 and the cylindrical outer peripheral wall of the cover-side insulating portion 79. In the present embodiment, the height H2 of the insulating wall portion 82 on the side of the main body portion 41 facing the outer peripheral wall 44 is higher than the height H1 of the outer peripheral wall 44.

本実施形態によれば、上記第１実施形態の効果（１）、（２）と同様の効果を奏し、さらに、リアカバー２５に外力が加わった際に、絶縁部材６５が外力を吸収するように作用することで、リアカバー２５の強度が増し、破損を抑制することができる。また、ねじ頭部５１の全周が絶縁部材６５で覆われるため、ねじ頭部５１に水滴が付着する虞がほぼなくなり、確実に漏電防止の効果が得られる。さらに、カバー側絶縁部７９とねじ側絶縁部８１とは、弾性を有する接着剤により固定されているので防水性を高めることができる。 According to the present embodiment, the same effects as those of the first embodiment (1) and (2) are exhibited, and further, when an external force is applied to the rear cover 25, the insulating member 65 absorbs the external force. By acting, the strength of the rear cover 25 is increased, and damage can be suppressed. Further, since the entire circumference of the screw head 51 is covered with the insulating member 65, there is almost no possibility that water droplets adhere to the screw head 51, and the effect of preventing electric leakage can be surely obtained. Further, since the cover-side insulating portion 79 and the screw-side insulating portion 81 are fixed by an elastic adhesive, the waterproof property can be improved.

〈第６実施形態〉
次に、第６実施形態の回転電機１０６について、図１０、図１１を参照して説明する。第６実施形態では、第５実施形態の回転電機１０５に対し、絶縁部材を構成するカバー側絶縁部の形状が異なる。第６実施形態のレクチファイヤ３６が備える絶縁部材６６は、カバー側絶縁部８３と、ねじ側絶縁部８１とで構成されている。カバー側絶縁部８３の絶縁壁部８４には、円筒形状の外周の一部が切り欠かれた切欠部８５が形成されている。切欠部８５は、カバー側絶縁部８３のねじ６側の端部であって、かつ、本体部４１の外周壁４４から離れた位置、すなわち外周壁４４と対向しない位置に形成されている。 <Sixth Embodiment>
Next, the rotary electric machine 106 of the sixth embodiment will be described with reference to FIGS. 10 and 11. In the sixth embodiment, the shape of the cover-side insulating portion constituting the insulating member is different from that of the rotary electric machine 105 of the fifth embodiment. The insulating member 66 included in the rectifier 36 of the sixth embodiment is composed of a cover-side insulating portion 83 and a screw-side insulating portion 81. The insulating wall portion 84 of the cover-side insulating portion 83 is formed with a cutout portion 85 in which a part of the outer periphery of the cylindrical shape is cut out. The notch 85 is formed at the end of the cover-side insulating portion 83 on the screw 6 side and at a position away from the outer peripheral wall 44 of the main body 41, that is, at a position not facing the outer peripheral wall 44.

図１１において、水の流れを破線の矢印Ａ１，Ａ２で示している。本実施形態によれば、上記第１実施形態の効果（１）、（２）と同様の効果を奏する。さらに、振動等で、仮にカバー側絶縁部８３とねじ側絶縁部８１とがずれてねじ頭部５１周辺に水滴が付着した場合でも、図１１において矢印Ａ２で示すように、切欠部８５から効率的に排水することができる。 In FIG. 11, the flow of water is indicated by dashed arrows A1 and A2. According to the present embodiment, the same effects as those of the first embodiment (1) and (2) are obtained. Further, even if the cover side insulating portion 83 and the screw side insulating portion 81 are displaced due to vibration or the like and water droplets adhere to the vicinity of the screw head 51, the efficiency is increased from the notch 85 as shown by the arrow A2 in FIG. Can be drained.

〈第７実施形態〉
次に、第７実施形態の回転電機１０７について、図１２を参照して説明する。第７実施形態のレクチファイヤ３７が備える絶縁部材６７は、容器状部材であって、リアカバー２５の天板部２６側から嵌め込まれてリアカバー２５と一体に構成されている。絶縁部材６７は、有底円筒部材を軸方向に斜めに交差する平面で切った形状をなしている。絶縁部材６７は、絶縁底部８６と、絶縁壁部８７とを有している。絶縁壁部８７は、リアカバー２５を貫通してその先端がリアカバー２５から僅かに突出している。 <7th Embodiment>
Next, the rotary electric machine 107 of the seventh embodiment will be described with reference to FIG. The insulating member 67 included in the rectifier 37 of the seventh embodiment is a container-shaped member, which is fitted from the top plate portion 26 side of the rear cover 25 and is integrally formed with the rear cover 25. The insulating member 67 has a shape obtained by cutting a bottomed cylindrical member by a plane that intersects diagonally in the axial direction. The insulating member 67 has an insulating bottom portion 86 and an insulating wall portion 87. The tip of the insulating wall portion 87 penetrates the rear cover 25 and slightly protrudes from the rear cover 25.

本実施形態では、ねじ頭部５１が絶縁部材６７によって完全に覆われるため、漏電やねじ頭部５１の腐食を抑制するなどの効果が得られる。 In the present embodiment, since the screw head 51 is completely covered by the insulating member 67, effects such as suppressing electric leakage and corrosion of the screw head 51 can be obtained.

〈他の実施形態〉
上記各実施形態において、正極ヒートシンク３と負極ヒートシンク５とを締結する締結部材は、ねじ６ではなくリベットなどのその他の締結部材であっても良い。 <Other Embodiments>
In each of the above embodiments, the fastening member for fastening the positive electrode heat sink 3 and the negative electrode heat sink 5 may be other fastening member such as a rivet instead of the screw 6.

上記各実施形態において、締結部４２は、その一部が本体部４１の外周から外側へ張り出して形成されるものとしたが、本体部４１の外径内に収まるように形成されていても良い。 In each of the above embodiments, a part of the fastening portion 42 is formed so as to project outward from the outer circumference of the main body portion 41, but the fastening portion 42 may be formed so as to fit within the outer diameter of the main body portion 41. ..

上記各実施形態において、負極ヒートシンク５は、リアフレーム１５の一部として構成したが、リアフレーム１５とは別体として構成しても良い。 In each of the above embodiments, the negative electrode heat sink 5 is configured as a part of the rear frame 15, but may be configured as a separate body from the rear frame 15.

上記各実施形態において、負極ダイオード４のリード線５３と、正極ダイオード２のリード線４３とは、向きが異なっているが、同一の方向に延びていても良い。 In each of the above embodiments, the lead wire 53 of the negative electrode diode 4 and the lead wire 43 of the positive electrode diode 2 have different directions, but may extend in the same direction.

上記第４実施形態において、段差部７７の高さは適宜変更可能であり、図１３に示す絶縁部材６８の段差部８８のように、絶縁底部５６に一致する高さとしても良い。また、第４実施形態において、図１３に示すように第２実施形態と同様の延設部７１を備えても良い。同様に、図１４に示す絶縁部材６９ように、第５実施形態のねじ側絶縁部８１に延設部７１を備えても良い。第６、７実施形態についても同様に延設部を設けても良い。 In the fourth embodiment, the height of the step portion 77 can be changed as appropriate, and may be a height that matches the insulating bottom portion 56, such as the step portion 88 of the insulating member 68 shown in FIG. Further, in the fourth embodiment, as shown in FIG. 13, the extension portion 71 similar to that in the second embodiment may be provided. Similarly, as in the insulating member 69 shown in FIG. 14, the screw-side insulating portion 81 of the fifth embodiment may be provided with an extension portion 71. An extension portion may be provided in the same manner for the sixth and seventh embodiments.

上記第５、６実施形態において、カバー側絶縁部７９，８３とねじ側絶縁部８１との接触部に、図１５に示すように、溝を設けてＯリング８９等の防水用部材を設けて固定しても良い。または、図１６〜図１８の各図に示すように、各絶縁部の接触部に係合形状を設けて、両者の係合により接続するようにしても良い。図１６は、対応する凹部と凸部の形状の組み合わせによる例であり、図１７は、係合爪９１による例を示している。また、図１８に示すように、組み付け時に、ねじ側絶縁部８１の絶縁壁部が潰れて、カバー側絶縁部７９，８３に嵌め込まれるようにしても良い。 In the fifth and sixth embodiments, as shown in FIG. 15, a groove is provided in the contact portion between the cover side insulating portions 79 and 83 and the screw side insulating portion 81, and a waterproof member such as an O-ring 89 is provided. It may be fixed. Alternatively, as shown in each of FIGS. 16 to 18, an engaging shape may be provided at the contact portion of each insulating portion, and the two may be engaged to connect with each other. FIG. 16 shows an example of a combination of the shapes of the corresponding concave portion and the convex portion, and FIG. 17 shows an example of the engagement claw 91. Further, as shown in FIG. 18, at the time of assembly, the insulating wall portion of the screw side insulating portion 81 may be crushed and fitted into the cover side insulating portions 79 and 83.

本発明は、上述した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で種々の形態で実施可能である。 The present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the spirit of the invention.

２ ・・・正極ダイオード
３ ・・・正極ヒートシンク
４ ・・・負極ダイオード（負極整流素子）
５ ・・・負極ヒートシンク（負極ヒートシンク）
６ ・・・ねじ（締結部材）
７ ・・・シンク間絶縁部
１１ ・・・シャフト
１２ ・・・ロータ
１３ ・・・ステータ
１４ ・・・フロントフレーム
１５ ・・・リアフレーム
２５ ・・・リアカバー
３１ ・・・レクチファイヤ
４１ ・・・本体部
４２ ・・・締結部
４４ ・・・外周壁
５１ ・・・頭部（突出部）
５６ ・・・絶縁底部
５７ ・・・絶縁壁部
５９ ・・・隙間
６１ ・・・絶縁部材
１０１ ・・・回転電機 2 ・ ・ ・ Positive electrode diode 3 ・ ・ ・ Positive electrode heat sink 4 ・ ・ ・ Negative electrode diode (negative electrode rectifying element)
5 ・ ・ ・ Negative electrode heat sink (negative electrode heat sink)
6 ・ ・ ・ Screw (fastening member)
7 ・ ・ ・ Insulation between sinks 11 ・ ・ ・ Shaft 12 ・ ・ ・ Rotor 13 ・ ・ ・ Stator 14 ・ ・ ・ Front frame 15 ・ ・ ・ Rear frame 25 ・ ・ ・ Rear cover 31 ・ ・ ・ Rectifier 41 ・ ・ ・Main body 42 ・ ・ ・ Fastening 44 ・ ・ ・ Outer wall 51 ・ ・ ・ Head (protruding part)
56 ・ ・ ・ Insulation bottom 57 ・ ・ ・ Insulation wall 59 ・ ・ ・ Gap 61 ・ ・ ・ Insulation member 101 ・ ・ ・ Rotating electric machine

Claims (8)

シャフト（１１）と、前記シャフトに固定されたロータ（１２）と、前記ロータの径方向外側に設けられ、前記ロータの回転に伴い交流電流を生じさせるステータ（１３）と、前記ロータ及び前記ステータを外周側で保持するフレーム（１４，１５）と、前記フレームの外側に固定され、前記ステータで生じた交流電流を整流するレクチファイヤ（３１，３２，３３，３５，３６，３７）と、前記レクチファイヤを覆うように設けられるリアカバー（２５）と、を備え、
前記レクチファイヤは、
グランド側に接続される負極整流素子（４）と、
前記負極整流素子が固定される負極ヒートシンク（５）と、
電源側に接続される正極整流素子（２）と、
前記負極ヒートシンクと前記リアカバーとの間に前記負極ヒートシンクと離間した状態で対向配置され、前記正極整流素子が固定される本体部（４１）、前記本体部よりも前記負極ヒートシンクに近い位置となるように前記本体部の外周壁（４４）に前記本体部と段差を有して形成される締結部（４２）、を含む正極ヒートシンク（３）と、
前記正極ヒートシンクの前記締結部に前記リアカバー側から前記締結部を挿通して前記負極ヒートシンクまで到達するように挿入され、前記正極ヒートシンクと前記負極ヒートシンクとの離間部分に設けられるシンク間絶縁部（７，７４）を介して前記正極ヒートシンクと前記負極ヒートシンクとを締結する部材であって、前記締結部から前記リアカバー側へ突出する突出部（５１）の高さ（Ｈ３）が前記本体部の前記外周壁の高さ（Ｈ１）よりも低い締結部材（６）と、
前記締結部材の前記突出部を覆う容器状の部材であって、前記締結部材が挿入される穴（５８）が形成され、前記締結部材の前記突出部と前記締結部との間に位置する絶縁底部（５６，７２，８６）、前記絶縁底部の外縁に連続し前記締結部材の前記突出部の外周を覆う絶縁壁部（５７，７３，７５，８２，８４，８７）、を有し、前記絶縁壁部は、前記本体部の前記外周壁に対向する側の高さ（Ｈ２）が最も高くかつ前記締結部材の前記突出部の高さよりも高く形成されている絶縁部材（６１，６２，６３，６４，６５，６６，６７）と、
を有し、前記レクチファイヤと前記リアカバーとの間には前記リアカバー内に浸入した液体を排出可能とする隙間（５９）が形成されている回転電機。 A shaft (11), a rotor (12) fixed to the shaft, a stator (13) provided on the radial outer side of the rotor and generating an alternating current as the rotor rotates, and the rotor and the stator. A frame (14, 15) holding the frame on the outer peripheral side, a rectifier (31, 32, 33, 35, 36, 37) fixed to the outside of the frame and rectifying an alternating current generated in the stator, and the above. With a rear cover (25) provided to cover the rectifier,
The rectifier is
The negative electrode rectifying element (4) connected to the ground side and
A negative electrode heat sink (5) to which the negative electrode rectifying element is fixed and
The positive electrode rectifying element (2) connected to the power supply side and
The main body (41), which is arranged between the negative electrode heat sink and the rear cover in a state of being separated from the negative electrode heat sink and to which the positive electrode rectifying element is fixed, is located closer to the negative electrode heat sink than the main body. A positive electrode heat sink (3) including a fastening portion (42) formed on the outer peripheral wall (44) of the main body portion with a step from the main body portion.
An inter-sink insulating portion (7) that is inserted into the fastening portion of the positive electrode heat sink from the rear cover side so as to reach the negative electrode heat sink and is provided at a separated portion between the positive electrode heat sink and the negative electrode heat sink. , 74) is a member for fastening the positive electrode heat sink and the negative electrode heat sink, and the height (H3) of the protruding portion (51) protruding from the fastening portion toward the rear cover side is the outer circumference of the main body portion. Fastening member (6) lower than wall height (H1),
A container-shaped member that covers the protruding portion of the fastening member, in which a hole (58) into which the fastening member is inserted is formed, and insulation is located between the protruding portion and the fastening portion of the fastening member. It has a bottom portion (56, 72, 86) and an insulating wall portion (57, 73, 75, 82, 84, 87) that is continuous with the outer edge of the insulating bottom portion and covers the outer periphery of the protruding portion of the fastening member. The insulating wall portion is formed so that the height (H2) of the main body portion facing the outer peripheral wall is the highest and higher than the height of the protruding portion of the fastening member (61, 62, 63). , 64, 65, 66, 67),
A rotary electric machine having a gap (59) formed between the rectifier and the rear cover so that the liquid that has entered the rear cover can be discharged. 前記絶縁壁部の最も高い部位の高さは、前記本体部の前記外周壁よりも低い請求項１に記載の回転電機。 The rotary electric machine according to claim 1, wherein the height of the highest portion of the insulating wall portion is lower than that of the outer peripheral wall of the main body portion. 前記絶縁壁部は円筒状をなし、前記本体部の前記外周壁に対向する側から離れていくほど徐々に低くなっている請求項１または請求項２に記載の回転電機。 The rotary electric machine according to claim 1 or 2, wherein the insulating wall portion has a cylindrical shape, and the height gradually decreases as the distance from the side of the main body portion facing the outer peripheral wall increases. 前記絶縁壁部（７５）は、
前記締結部材の前記突出部の高さよりも高い高さで一定に形成される壁高一定部（７６）と、
前記本体部の前記外周壁に対向する側から離れた位置に、前記絶縁底部とは反対側の端部から前記絶縁底部側へ前記絶縁壁部の一部を切り欠いて形成される段差部（７７）と、
を含んでいる請求項１または請求項２に記載の回転電機。 The insulating wall portion (75) is
A wall height constant portion (76) formed to be constant at a height higher than the height of the protrusion portion of the fastening member, and
A stepped portion (a step portion) formed by cutting out a part of the insulating wall portion from the end portion on the side opposite to the insulating bottom portion to the insulating bottom portion side at a position away from the side of the main body portion facing the outer peripheral wall. 77) and
The rotary electric machine according to claim 1 or 2, which comprises. 前記絶縁部材（６２）は、前記正極ヒートシンクの前記締結部の外周の少なくとも一部を覆うように、前記絶縁底部から前記シャフトの軸方向に延びて形成される延設部（７１）を有する請求項１〜請求項４のうちいずれか一項に記載の回転電機。 The insulating member (62) has an extension portion (71) formed so as to extend from the insulating bottom portion in the axial direction of the shaft so as to cover at least a part of the outer periphery of the fastening portion of the positive electrode heat sink. The rotary electric machine according to any one of items 1 to 4. 前記絶縁部材（６３）は、前記シンク間絶縁部（７４）と一体に形成されている請求項１〜請求項５のうちいずれか一項に記載の回転電機。 The rotary electric machine according to any one of claims 1 to 5, wherein the insulating member (63) is integrally formed with the inter-sink insulating portion (74). 前記絶縁壁部（８２，８４）の少なくとも一部は、前記リアカバーの一部として形成されている請求項１〜請求項６のうちいずれか一項に記載の回転電機。 The rotary electric machine according to any one of claims 1 to 6, wherein at least a part of the insulating wall portion (82, 84) is formed as a part of the rear cover. 前記絶縁部材（６５，６６）は、前記絶縁壁部を構成するとともに前記リアカバーの一部として形成されるカバー側絶縁部（７９，８３）と、前記カバー側絶縁部の前記締結部材側に設けられ前記絶縁壁部と前記絶縁底部のうち少なくとも前記絶縁底部を構成する締結部材側絶縁部（８１）と、を含んでいる請求項７に記載の回転電機。 The insulating member (65, 66) is provided on the cover side insulating portion (79,83) which constitutes the insulating wall portion and is formed as a part of the rear cover, and on the fastening member side of the cover side insulating portion. The rotary electric machine according to claim 7, further comprising the insulating wall portion and the fastening member side insulating portion (81) constituting at least the insulating bottom portion among the insulating bottom portions.
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Citations (5)

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WO2013080258A1 (en) * 2011-11-30 2013-06-06 三菱電機株式会社 Rotating electrical machine for vehicle
DE102013217821A1 (en) * 2013-09-06 2015-03-12 Robert Bosch Gmbh Electric machine and method for manufacturing an electric machine
US20150295480A1 (en) * 2014-04-11 2015-10-15 Remy Technologies Llc Electric machine with combined insulator and terminal assembly
JP2017103922A (en) * 2015-12-02 2017-06-08 三菱電機株式会社 Power supply unit-integrated rotary electric machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012170294A (en) * 2011-02-16 2012-09-06 Mitsubishi Electric Corp Rotating electric machine for vehicle
WO2013080258A1 (en) * 2011-11-30 2013-06-06 三菱電機株式会社 Rotating electrical machine for vehicle
DE102013217821A1 (en) * 2013-09-06 2015-03-12 Robert Bosch Gmbh Electric machine and method for manufacturing an electric machine
US20150295480A1 (en) * 2014-04-11 2015-10-15 Remy Technologies Llc Electric machine with combined insulator and terminal assembly
JP2017103922A (en) * 2015-12-02 2017-06-08 三菱電機株式会社 Power supply unit-integrated rotary electric machine

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