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JP2016077069A - Automotive rotating electrical machine - Google Patents

Automotive rotating electrical machine Download PDF

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Publication number
JP2016077069A
JP2016077069A JP2014205365A JP2014205365A JP2016077069A JP 2016077069 A JP2016077069 A JP 2016077069A JP 2014205365 A JP2014205365 A JP 2014205365A JP 2014205365 A JP2014205365 A JP 2014205365A JP 2016077069 A JP2016077069 A JP 2016077069A
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housing
motor
ring
cover motor
electrical machine
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JP2014205365A
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JP6506523B2 (en
Inventor
中山 賢治
Kenji Nakayama
賢治 中山
金澤 宏至
Hiroshi Kanazawa
宏至 金澤
濱田 泰久
Yasuhisa Hamada
泰久 濱田
省三 川崎
Shozo Kawasaki
省三 川崎
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Engineering Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle rotary electric machine which is capable of fixing a motor housing and a cover motor corresponding component without being enlarged.SOLUTION: An on-vehicle rotary electric machine 100 is configured in such a manner that one bearing 9 is disposed in a housing 1 that is configured integrally, another bearing 10 is disposed in a cover motor 13 and the cover motor 13 is fixed to the housing 1 by ring-shaped members 19a and 19b which are shrink-fitted or press-fitted to the housing 1. Further, the on-vehicle rotary electric machine may also be configured in such a manner that a projection is provided on a surface of the ring-shaped member 19b at a side of the cover motor 13, a recess is provided on a surface of the cover motor 13 at a side of the ring-shaped member 19b, and the projection of the ring-shaped member 19b and the recess of the cover motor 13 are fitted.SELECTED DRAWING: Figure 6

Description

本発明は、車載用回転電機に用いるカバーモータ(ベアリング軸受けフランジ)をハウジングに固定する構造及び、回転電機の軸受け構造に関するものである。   The present invention relates to a structure for fixing a cover motor (bearing bearing flange) used for a vehicle-mounted rotating electrical machine to a housing, and a bearing structure for the rotating electrical machine.

従来の技術として、以下の2件の文献がある。特許文献1にはカバーモータ相当部品のベアリングケースとモータハウジングの固定をベアリングケースのインロー部で、モータハウジングと位置決めし、ねじ固定している構造が開示されている。また、特許文献2にも特許文献1と同様にねじ固定している構造が開示されているが、こちらのベアリングケースには、固定子巻線からなる、モータ3相出力結線がモータハウジング内部まで通っている。   There are the following two documents as conventional techniques. Patent Document 1 discloses a structure in which a bearing case corresponding to a cover motor and a motor housing are fixed to each other with a motor housing at an inlay portion of the bearing case and fixed with screws. Also, Patent Document 2 discloses a structure in which screws are fixed in the same manner as Patent Document 1, but in this bearing case, a motor three-phase output connection consisting of a stator winding extends to the inside of the motor housing. Passing through.

国際公開WO2008/108431号公報International Publication No. WO2008 / 108431 特開2013−34388号公報JP 2013-34388 A

特許文献1に記載のものは、ベアリングケースとモータハウジングを、ねじで固定している。このため、ベアリングケースとモータハウジングに、ねじ座面が必要な形状となり、部品が大型化する事が考えられる。   The thing of patent document 1 has fixed the bearing case and the motor housing with the screw. For this reason, it is conceivable that screw bearing surfaces are required for the bearing case and the motor housing, and the size of the parts increases.

また、特許文献2に記載されているものも、特許文献1と同様に、ねじ座面が必要な事からベアリングケースとモータハウジングの大型化が必要になる事が考えられる。   In addition, as described in Patent Document 2, as in Patent Document 1, since a screw seat surface is required, it may be necessary to increase the size of the bearing case and the motor housing.

そこで本発明は、大型化することなくモータハウジングとカバーモータ相当部品の固定が可能な車載用回転電機を提供することを目的とする。   Accordingly, an object of the present invention is to provide a vehicle-mounted rotating electrical machine that can fix a motor housing and a cover motor equivalent component without increasing the size.

上記課題を解決するために、例えば特許請求の範囲に記載の構成を採用する。   In order to solve the above problems, for example, the configuration described in the claims is adopted.

本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、一体で構成されるハウジングに一方のベアリングが配置され、カバーモータに他方のベアリングが配置され、前記カバーモータが、前記ハウジングに焼嵌め又は圧入されたリング状部材により、前記ハウジングに固定されたことを特徴とする。   The present application includes a plurality of means for solving the above-described problems. To give an example, one bearing is disposed in an integrally formed housing, and the other bearing is disposed in a cover motor. The ring-shaped member is shrink-fitted or press-fitted into the housing, and is fixed to the housing.

本発明によれば、モータハウジングとカバーモータの固定部を設ける必要が無く、小型化と部品コスト低減とを図ることができる。   According to the present invention, there is no need to provide a fixing portion between the motor housing and the cover motor, and it is possible to achieve downsizing and cost reduction of parts.

上記した以外の課題、構成及び効果は、以下の実施例の説明により明らかにされる。   Problems, configurations, and effects other than those described above will become apparent from the description of the following examples.

電動パワーステアリング用モータの構成を説明する断面図Sectional drawing explaining the structure of the motor for electric power steering 実施例1及び実施例2のハウジング及び固定子組付け状態の断面斜視図Sectional perspective view of housing and stator assembled state of Example 1 and Example 2 実施例1及び実施例2のカバーモータ及び回転子組付け状態の断面斜視図Cross-sectional perspective view of the cover motor and rotor assembly state of Example 1 and Example 2 実施例1及び実施例2のハウジング及び、カバーモータ嵌合状態の断面斜視図Sectional perspective view of housing of Example 1 and Example 2 and cover motor fitting state (a)実施例1のカバーモータ固定部材の斜視図、(b)実施例2のカバーモータ固定部材の斜視図(A) The perspective view of the cover motor fixing member of Example 1, (b) The perspective view of the cover motor fixing member of Example 2. 実施例1及び実施例2のカバーモータ固定部材般合状態の断面斜視図Cross-sectional perspective view of cover motor fixing member in a general state of Example 1 and Example 2

本発明の実施例について図1〜図6を用いて説明する。   An embodiment of the present invention will be described with reference to FIGS.

本発明の一実施例である、電動パワーステアリング用モータを用いてカバーモータ(ベアリング軸受けフランジ)をハウジングに固定する構造及び、回転電機の軸受け構造について説明していく。図1は電動パワーステアリングモータの軸方向断面図を示したものである。   A structure for fixing a cover motor (bearing bearing flange) to a housing using an electric power steering motor and a bearing structure for a rotating electrical machine, which are embodiments of the present invention, will be described. FIG. 1 is an axial sectional view of an electric power steering motor.

先ず、全体の構成について説明する。ハウジング1の内周側には分割されたステータコア2が、溶接または溶接レスでリング形状を保持し圧入または焼嵌めされている。このステータコア2にはボビン3が取り付けられ、その外周部にコイル4が巻かれている。コイル4の口出し線は中継端子台14に設けられた中継端子15に機械カシメと溶接にて接続され、ねじ18が通る貫通穴15aを有した中継端子15の端面は、バスバーモールド16に設けられた、ねじ18の座面部を有する3相出力端子17の端面とねじ18を締結する事により、中継端子15と3相出力端子17が接続される。ステータコア2の内周側には、シャフト5、ロータコア6、磁石7、磁石カバー8から構成される回転子が設けられており、回転子はFベアリング9及びRベアリング10により支持され、Fベアリング9はハウジング1に、トメワ12を用いて軸方向に固定され、Rベアリング10は、予圧ばね11の予圧を受けて、Fベアリング9及びRベアリング10の内・外輸の隙間を打ち消しながら、カバーモータ13が抜ける方向に予圧の影響がかからないようにシャフト5に固定される。カバーモータ13の固定はリング19aをハウジング1の内部で焼嵌め、又は圧入し、ハウジング1のカバーモータ搭載面1aに押し付けたようにリング19aと挟み込む事で、カバーモータ13を回定している。カバーモータ13は貫通穴が設けられ、中継端子15及び3相出力端子17が通っており、バスバーモールド16の絶縁体の空間の中で、先に述べたように、ねじ18により中継端子15と3相出力端子17が接続される。更に、中継端子15と3相出力端子17は各相の接続を3相出力できるように配線され、UVWの3相出力となっている。この3相出力端子17にインバータから電力を給電することで、モータは回転する。   First, the overall configuration will be described. A divided stator core 2 is press-fitted or shrink-fitted on the inner peripheral side of the housing 1 while maintaining a ring shape without welding or welding. A bobbin 3 is attached to the stator core 2 and a coil 4 is wound around the outer periphery thereof. The lead wire of the coil 4 is connected to the relay terminal 15 provided on the relay terminal block 14 by mechanical caulking and welding, and the end surface of the relay terminal 15 having a through hole 15a through which the screw 18 passes is provided on the bus bar mold 16. The relay terminal 15 and the three-phase output terminal 17 are connected by fastening the screw 18 to the end face of the three-phase output terminal 17 having the seating surface portion of the screw 18. A rotor including a shaft 5, a rotor core 6, a magnet 7, and a magnet cover 8 is provided on the inner peripheral side of the stator core 2, and the rotor is supported by an F bearing 9 and an R bearing 10. Is fixed to the housing 1 in the axial direction with the use of a tomewa 12, and the R bearing 10 receives the preload of the preload spring 11 and cancels the clearance between the inner and outer parts of the F bearing 9 and the R bearing 10. It is fixed to the shaft 5 so as not to be affected by the preload in the direction in which 13 is removed. The cover motor 13 is fixed by shrink-fitting the cover motor 13 by shrink-fitting or press-fitting the ring 19a inside the housing 1 and sandwiching it with the ring 19a as if pressed against the cover motor mounting surface 1a of the housing 1. . The cover motor 13 is provided with a through hole, through which the relay terminal 15 and the three-phase output terminal 17 pass, and in the insulator space of the bus bar mold 16, as described above, the screw 18 is connected to the relay terminal 15. A three-phase output terminal 17 is connected. Further, the relay terminal 15 and the three-phase output terminal 17 are wired so that the connection of each phase can be output in three phases, and are UVW three-phase outputs. The motor rotates by supplying electric power from the inverter to the three-phase output terminal 17.

次に、図2を用いて、カバーモータ13挿入前のハウジング1内部の構成について説明する。ハウジング1内部の最外周にはステータコア2が配置されている。ステータコア2はT型の分割コアで構成されており、2つのティースにボビン3を互いに組合せた状態で、1つのコイル4が集中的に巻かれる2連続巻線構造となっている。各ステータコア2はコアバック外周部で、溶接または溶接レスでリング形状に連結される。コイル4の口出し線は、樹脂で形成された中継端子台14の貫通穴を介して、中継端子15に機械カシメと溶接にて接続される。U・V・Wの3相出力用の中継端子15には、3相出力端子17と、ねじ18で接続可能にするための、貫通穴15aが設けられている。中継端子台14は、樹脂で形成されたボビン3と熱カシメ、又は接着剤により固定される。これらのステータコア2などから成る巻線ユニットと、中継端子台14などから成る結線ユニットを組合せたものをハウジング1の内部に焼嵌め、又は圧入などで挿入し嵌合させている。ハウジング1の内部には、径違いの段差部を利用して、カバーモータ搭載面1aが形成されている。ハウジング1のベアリングボックスには、Fベアリング9が挿入され、トメワ12によりFベアリング9が固定される。   Next, the internal structure of the housing 1 before the cover motor 13 is inserted will be described with reference to FIG. A stator core 2 is disposed on the outermost periphery inside the housing 1. The stator core 2 is formed of a T-shaped split core, and has a two-continuous winding structure in which one coil 4 is concentratedly wound in a state where the bobbin 3 is combined with two teeth. Each stator core 2 is connected in a ring shape with or without welding at the outer periphery of the core back. The lead wire of the coil 4 is connected to the relay terminal 15 by mechanical caulking and welding through a through hole of the relay terminal block 14 formed of resin. The relay terminal 15 for U / V / W three-phase output is provided with a three-phase output terminal 17 and a through hole 15 a for enabling connection with a screw 18. The relay terminal block 14 is fixed by a bobbin 3 made of resin and heat caulking, or an adhesive. A combination of the winding unit composed of the stator core 2 and the like and the wiring unit composed of the relay terminal block 14 is inserted into the housing 1 by shrink fitting or press-fitting or the like. A cover motor mounting surface 1a is formed inside the housing 1 by using a step portion having a different diameter. An F bearing 9 is inserted into the bearing box of the housing 1, and the F bearing 9 is fixed by the tomewa 12.

図3を用いて、ハウジング1挿入前の回転子の構成について説明する。シャフト5の外周側には、ロータコア6が焼嵌め、又は圧入により固定され、ロータコア6の外周面に接着材を塗布し、磁石7が固定される。磁石7の外面には、磁石カバー8が配置される。カバーモータ13のベアリングボックスに予圧ばね11を設置し、予圧ばね11がカバーモータ13のベアリングボックスと挟み込まれるような形でRベアリング10が配置され、シャフト5とRベアリングの内輪が圧入固定される。   The configuration of the rotor before the housing 1 is inserted will be described with reference to FIG. The rotor core 6 is fixed to the outer peripheral side of the shaft 5 by shrink fitting or press fitting, and an adhesive is applied to the outer peripheral surface of the rotor core 6 to fix the magnet 7. A magnet cover 8 is disposed on the outer surface of the magnet 7. The preload spring 11 is installed in the bearing box of the cover motor 13, the R bearing 10 is arranged in such a manner that the preload spring 11 is sandwiched between the bearing box of the cover motor 13, and the shaft 5 and the inner ring of the R bearing are press-fitted and fixed. .

図4を用いて、ハウジング1のカバーモータ搭載面1aにカバーモータ13が搭載された状態を説明する。先に図2にて述べたように、ハウジング1の内部には、径違いの段差部を設けて形成された、カバーモータ搭載面1aが構成される。カバーモータ搭載面1aの上面にはカバーモータ13が搭載され、中継端子台14に設けられた、UVWの3相中継端子15が、カバーモータ13に設けられた、貫通穴を介してカバーモータ13上に配置される。   The state where the cover motor 13 is mounted on the cover motor mounting surface 1a of the housing 1 will be described with reference to FIG. As described above with reference to FIG. 2, the cover motor mounting surface 1 a is formed inside the housing 1 so as to be provided with a step portion having a different diameter. A cover motor 13 is mounted on the upper surface of the cover motor mounting surface 1a, and a UVW three-phase relay terminal 15 provided on the relay terminal block 14 is provided in the cover motor 13 via a through hole. Placed on top.

図5の(a)にハウジング1内部で、カバーモータ13を固定するための、リング形状の1つ目の実施例を示す。先に図4で説明したようにハウジング1とカバーモータ13を搭載した状態では、カバーモータ13の軸方向固定がされておらず、また、カバーモータ13が回転してしまうため、リング19aをハウジング1内部に焼嵌め、又は圧入し、カバーモータ13をカバーモータ搭載面1aとリング19aの端面で軸方向に挟み込む事で発生する軸力を利用して、カバーモータ13の軸方向固定及び回転抑制と回転防止を行う。リング19aは、例えばハウジング1の軸方向略中心位置付近に配置される。   FIG. 5A shows a first embodiment of a ring shape for fixing the cover motor 13 inside the housing 1. As described above with reference to FIG. 4, when the housing 1 and the cover motor 13 are mounted, the cover motor 13 is not fixed in the axial direction, and the cover motor 13 rotates. The cover motor 13 is fixed in the axial direction and the rotation is suppressed by using the axial force generated by inserting the cover motor 13 in the axial direction between the cover motor mounting surface 1a and the end surface of the ring 19a. And prevent rotation. The ring 19a is disposed, for example, in the vicinity of the substantially center position in the axial direction of the housing 1.

リング19aの材質はハウジング1、カバーモータ13と同素材とする事で、熱による線膨張係数差による嵌合緩みを防止できる。また、ハウジング1内部での嵌合とする事が可能となり、リング19aを嵌合するためのハウジング1の余分な肉厚増加が不要となる事から、部品の大型化を防ぐ事が可能になる。更に、防水型回転電機として利用する場合においては、ハウジング1とカバーモータ13の嵌合面に防水シール構造を取る必要が無く、防水型回転電機とする事が可能となる。モータ3相出力結線においては、ハウジング1内部だけで結線処理が可能な構造としており、ハウジング1外部からのコンタミ侵入が無い構造を得る事が可能となる。   By making the material of the ring 19a the same material as the housing 1 and the cover motor 13, it is possible to prevent loose fitting due to a difference in linear expansion coefficient due to heat. Further, it is possible to fit inside the housing 1, and it becomes unnecessary to increase the thickness of the housing 1 for fitting the ring 19a, so that it is possible to prevent an increase in size of the parts. . Furthermore, when used as a waterproof rotary electric machine, it is not necessary to provide a waterproof seal structure on the fitting surface of the housing 1 and the cover motor 13, and a waterproof rotary electric machine can be obtained. In the motor three-phase output connection, the connection processing can be performed only inside the housing 1, and it is possible to obtain a structure in which no contamination enters from the outside of the housing 1.

図5の(b)にハウジング1内部で、カバーモータ13を固定するための、リング形状の2つ目の実施例を示す。先に説明したように、リング19bの材質をハウジング1、カバーモータ13と同素材とする事で、図5の(a)で説明した効果と同様の効果を得る事が可能となるが、図5の(b)に示す2つ目の実施例形状では、リング19bのカバーモータ13を固定する際に挟み込む面に、歯型を追加したものである。リング19bで新たに追加した凸型の歯型(凸部)は、カバーモータ13のリング19bとの嵌合面に凹部(図示せず)を設ける事で、凸凹形状が嵌合し、更に強固にカバーモータ13の回転抑制を行う事が可能となる。   FIG. 5B shows a second embodiment of a ring shape for fixing the cover motor 13 inside the housing 1. As described above, by making the material of the ring 19b the same as that of the housing 1 and the cover motor 13, it is possible to obtain the same effect as the effect described in FIG. In the second embodiment shape shown in FIG. 5B, a tooth shape is added to the surface sandwiched when the cover motor 13 of the ring 19b is fixed. The convex tooth shape (convex portion) newly added in the ring 19b is provided with a concave portion (not shown) on the fitting surface of the cover motor 13 with the ring 19b, so that the concave and convex shape is fitted and further strengthened. In addition, the rotation of the cover motor 13 can be suppressed.

図6にハウジング1にリング19a、及び、リング19bが焼嵌め、又は圧入された状態を示す。先に図5の(a)及び(b)で述べたように、リング19aをハウジング1内部に焼嵌め、又は圧入し、カバーモータ13をカバーモータ搭載面1aとリング19aの端面で、軸方向に挟み込む事で発生する軸力を利用して、カバーモータ13の軸方向固定及び回転抑制と回転防止を行う。   FIG. 6 shows a state in which the ring 19a and the ring 19b are shrink-fitted or press-fitted into the housing 1. As previously described in FIGS. 5A and 5B, the ring 19a is shrink-fitted or press-fitted into the housing 1, and the cover motor 13 is axially moved between the cover motor mounting surface 1a and the end surface of the ring 19a. The cover motor 13 is fixed in the axial direction, the rotation is suppressed, and the rotation is prevented by using the axial force generated by being sandwiched between the two.

また、2つ目の実施例では、リング19bのカバーモータ13を固定する際に挟み込む面に、凸型の歯型形状を追加し、カバーモータ13の嵌合面に凹形状(図示せず)を設ける事で、凸凹形状が嵌合し、更に強固にカバーモータ13の回転抑制を行う事が可能となる。   In the second embodiment, a convex tooth shape is added to the surface of the ring 19b that is sandwiched when the cover motor 13 is fixed, and a concave shape (not shown) is formed on the fitting surface of the cover motor 13. By providing the protrusions and recesses, the concave and convex shapes can be fitted, and the rotation of the cover motor 13 can be more strongly suppressed.

リング19a,19bの材質は、ハウジング1、カバーモータ13と同素材とする事で、熱による線膨張係数差による嵌合緩みを防止できる。   The ring 19a, 19b is made of the same material as the housing 1 and the cover motor 13, so that loosening due to a difference in linear expansion coefficient due to heat can be prevented.

また、ハウジング1内部での嵌合とする事が可能となり、リング19aを嵌合するためのハウジング1の余分な肉厚増加が不要となる事から、部品の大型化を防ぐ事が可能になる。例えば、リング19a,19bを、ハウジング1の厚みが4mm以下の部分に嵌合させることができる。   Further, it is possible to fit inside the housing 1, and it becomes unnecessary to increase the thickness of the housing 1 for fitting the ring 19a, so that it is possible to prevent an increase in size of the parts. . For example, the rings 19a and 19b can be fitted to a portion where the thickness of the housing 1 is 4 mm or less.

更に、防水型回転電機として利用する場合においては、ハウジング1とカバーモータ13の鍛合面に防水シール構造を取る必要が無く、防水型回転電機とする事が可能となる。   Furthermore, when used as a waterproof rotary electric machine, it is not necessary to provide a waterproof seal structure on the forging surfaces of the housing 1 and the cover motor 13, and a waterproof rotary electric machine can be obtained.

モータ3相出力結線においては、ハウジング1内部だけで結線処理が可能な構造としており、ハウジング1外部からのコンタミ侵入が無い構造を得る事が可能となる。   In the motor three-phase output connection, the connection processing can be performed only inside the housing 1, and it is possible to obtain a structure in which no contamination enters from the outside of the housing 1.

本発明の実施の態様の例を簡潔にまとめると、次のようになる。   An example of an embodiment of the present invention can be briefly summarized as follows.

<実施の態様1>
車載用に用いられる回転電機であって、一体で構成されるハウジングに1つのベアリングを有し、片方のベアリングを支持するカバーモータ(ベアリング軸受けフランジ)を、前記ハウジングにリング状の部材により、焼き嵌め固定する。
<Embodiment 1>
A rotating electrical machine used for in-vehicle use, wherein a cover motor (bearing bearing flange) that has one bearing and supports one of the bearings is baked on the housing by a ring-shaped member. Fit and fix.

<実施の態様2>
実施の態様1に記載のリング状の部材において、カバーモータ固定面に凸型の歯型が設けられ、カバーモータのO型リング嵌合形状を凹型として嵌合されている。
<Embodiment 2>
In the ring-shaped member described in the first embodiment, a convex tooth shape is provided on the cover motor fixing surface, and the O-ring fitting shape of the cover motor is fitted as a concave shape.

<実施の態様3>
実施の態様1又は2に記載のリング状の部材が、ハウジング、カバーモータと線膨張係数を略同一とする。
<Embodiment 3>
The ring-shaped member described in the first or second embodiment has substantially the same linear expansion coefficient as that of the housing and the cover motor.

<実施の態様4>
実施の態様1又は2に記載のリング状の部材が、ハウジングの軸方向略中心位置付近に嵌合されている。
<Embodiment 4>
The ring-shaped member described in the first or second embodiment is fitted in the vicinity of a substantially central position in the axial direction of the housing.

<実施の態様5>
実施の態様1又は2のリング状の部材を、ハウジング厚み4mm以下の部分に嵌合させる。
<Embodiment 5>
The ring-shaped member of Embodiment 1 or 2 is fitted into a portion having a housing thickness of 4 mm or less.

従来技術、例えば特許文献1に記載のものは、ベアリングケースとモータハウジングを、ねじで固定している。このため、ベアリングケースとモータハウジングに、ねじ座面が必要な形状となり、部品が大型化する事が考えられる。また、ベアリングケースとモータハウジングの嵌合面はゴム部材などを利用した防水シール構造にはなっておらず、防水シール構造とするには更なる大型化と防水シール専用部品の追加が必要となる事が考えられる。防水シール構造となっていない事から、モータ外部からモータ内部へのコンタミ侵入の可能性があり、モータ内部の囲転子と固定子のエアギャップ面にコンタミが詰まりモータロックの可能性がある事が考えられる。   In the prior art, for example, one described in Patent Document 1, a bearing case and a motor housing are fixed with screws. For this reason, it is conceivable that screw bearing surfaces are required for the bearing case and the motor housing, and the size of the parts increases. In addition, the mating surface between the bearing case and the motor housing does not have a waterproof seal structure using a rubber member, etc. In order to achieve a waterproof seal structure, further enlargement and addition of parts dedicated to the waterproof seal are required. Things can be considered. There is a possibility of contamination from the outside of the motor to the inside of the motor because it is not a waterproof seal structure, and there is a possibility that the air gap between the surrounding trochanter and the stator inside the motor will become clogged and the motor may be locked. Can be considered.

また、特許文献2に記載されているものも、特許文献1と同様に、ねじ座面が必要な事からベアリングケースとモータハウジングの大型化が必要になる事が考えられる。また、ベアリングケースとモータハウジングの嵌合面には防水シール構造とはなっておらず、防水性には乏しい構造となっている事が考えられる。更に、ベアリングケースには固定子巻線からなる、モータ3相出力結線がモータハウジング内部から外部まで通っているために、結線が通る部位には空気孔が空いた構造となる事が考えられ、特許文献1に記載の構造よりも、更に耐コンタミ性が悪化してしまう事が考えられる。   In addition, as described in Patent Document 2, as in Patent Document 1, since a screw seat surface is required, it may be necessary to increase the size of the bearing case and the motor housing. Further, the fitting surface between the bearing case and the motor housing does not have a waterproof seal structure, and it is conceivable that the structure has poor waterproofness. Furthermore, the bearing case is composed of stator windings, and the motor three-phase output connection passes from the inside of the motor housing to the outside. It is conceivable that the contamination resistance is further deteriorated as compared with the structure described in Patent Document 1.

そこで、本発明を採用することにより、モータハウジング内径側でカバーモータの固定が可能となり、部品の大型化を防ぐ事ができる。また、モータハウジングとカバーモータの嵌合面はモータハウジング内部とする事が可能となり、防水型回転電機とする場合においては、嵌合面に防水シール構造を設ける必要が無い。更に、モータハウジング内でのモータ3相出力結線が可能な構造としている事で、モータハウジング外部からのコンタミ侵入が無い構造を得る事が可能となる。また、従来のリング構造として、カバーモータの固定は、C型リングのばね力を用いて、モータハウジングの内径に食い込ませた事による、摩擦力で、カバーモータを軸方向に固定していたが、C型リングを採用した場合、モータハウジングに取付け溝を形成する必要があるため、モータハウジングが径方向に大型化してしまう事と、Cリング嵌め込み時の作業性が悪く、Cリング取付け治具から外れてしまうと、作業危険性が高いため、Oリングを採用する事で、嵌め込み時の作業性及び安全性を改善すると共に、モータハウジングの肉厚増加を防ぐ事が可能となる。   Therefore, by employing the present invention, the cover motor can be fixed on the inner diameter side of the motor housing, and the size of the parts can be prevented from being increased. Further, the fitting surface between the motor housing and the cover motor can be inside the motor housing, and in the case of a waterproof rotating electrical machine, it is not necessary to provide a waterproof seal structure on the fitting surface. Furthermore, by adopting a structure that enables motor three-phase output connection in the motor housing, it is possible to obtain a structure in which no contamination enters from the outside of the motor housing. In addition, as a conventional ring structure, the cover motor is fixed in the axial direction by the frictional force generated by biting into the inner diameter of the motor housing using the spring force of the C-shaped ring. When a C-shaped ring is used, it is necessary to form a mounting groove in the motor housing, so that the motor housing is enlarged in the radial direction and the workability when the C-ring is fitted is poor. If it comes off, the work risk is high, and by adopting an O-ring, it is possible to improve workability and safety at the time of fitting, and to prevent an increase in the thickness of the motor housing.

本発明は、電動パワーステアリングモータに用いられるブラシレスモータや各種発電機等の車載用回転電機の軸受け構造及びカバーモータをハウジングに固定する構造として利用することができる。   INDUSTRIAL APPLICABILITY The present invention can be used as a structure for fixing a bearing motor and a cover motor of an in-vehicle rotating electrical machine such as a brushless motor or various generators used for an electric power steering motor to a housing.

なお、本発明は上記した実施例に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。   In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

100 車載用電動機
1 ハウジング
1a カバーモータ搭載面
2 ステータコア
3 ボビン
4 コイル
5 シャフト
6 ロータコア
7 磁石
8 磁石カバー
9 Fベアリング
10 Rベアリング
11 予圧ばね
12 トメワ
13 カバーモー夕
14 中継端子台
15 中継端子
16 ハスバーモールド
17 3相出力端子
18 ねじ
19a リング
19b リング
DESCRIPTION OF SYMBOLS 100 In-vehicle motor 1 Housing 1a Cover motor mounting surface 2 Stator core 3 Bobbin 4 Coil 5 Shaft 6 Rotor core 7 Magnet 8 Magnet cover 9 F bearing 10 R bearing 11 Preload spring 12 Tomewa 13 Cover motor 14 Relay terminal block 15 Relay terminal 16 Hasbar Mold 17 Three-phase output terminal 18 Screw 19a Ring 19b Ring

Claims (5)

一体で構成されるハウジングに一方のベアリングが配置され、
カバーモータに他方のベアリングが配置され、
前記カバーモータが、前記ハウジングに焼嵌め又は圧入されたリング状部材により、前記ハウジングに固定された車載用回転電機。
One of the bearings is arranged in a one-piece housing,
The other bearing is placed on the cover motor,
A vehicle-mounted rotating electrical machine in which the cover motor is fixed to the housing by a ring-shaped member that is shrink-fitted or press-fitted into the housing.
請求項1に記載の車載用回転電機であって、
前記リング状部材のカバーモータ側の面に凸部が設けられ、
前記カバーモータの前記リング状部材側の面に凹部が設けられ、
前記リング状部材の凸部と前記カバーモータの凹部とが嵌合した車載用回転電機。
The in-vehicle rotating electrical machine according to claim 1,
A convex portion is provided on the surface of the ring-shaped member on the cover motor side,
A recess is provided on the surface of the cover motor on the ring-shaped member side,
An in-vehicle rotating electrical machine in which a convex portion of the ring-shaped member and a concave portion of the cover motor are fitted.
請求項1又は2に記載の車載用回転電機であって、
前記リング状部材は、前記ハウジング及び前記カバーモータと線膨張係数が略同一である車載用回転電機。
The in-vehicle rotating electrical machine according to claim 1 or 2,
The ring-shaped member is a vehicle-mounted rotating electrical machine whose linear expansion coefficient is substantially the same as that of the housing and the cover motor.
請求項1乃至3のいずれかに記載の車載用回転電機であって、
前記リング状部材が、前記ハウジングの厚み4mm以下の部分に配置された車載用回転電機。
The in-vehicle rotating electrical machine according to any one of claims 1 to 3,
A vehicle-mounted rotating electrical machine in which the ring-shaped member is disposed in a portion of the housing having a thickness of 4 mm or less.
請求項1乃至4のいずれかに記載の車載用回転電機であって、
前記リング状部材が、前記ハウジングの軸方向の略中心に設けられた車載用回転電機。
The in-vehicle rotating electrical machine according to any one of claims 1 to 4,
A vehicle-mounted rotating electrical machine in which the ring-shaped member is provided at substantially the center in the axial direction of the housing.
JP2014205365A 2014-10-06 2014-10-06 Automotive electric rotating machine Expired - Fee Related JP6506523B2 (en)

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US10778060B2 (en) 2016-08-12 2020-09-15 Nidec Corporation Motor
US10938262B2 (en) 2016-08-12 2021-03-02 Nidec Corporation Motor and electric power steering device
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