JP4657249B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP4657249B2
JP4657249B2 JP2007137865A JP2007137865A JP4657249B2 JP 4657249 B2 JP4657249 B2 JP 4657249B2 JP 2007137865 A JP2007137865 A JP 2007137865A JP 2007137865 A JP2007137865 A JP 2007137865A JP 4657249 B2 JP4657249 B2 JP 4657249B2
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frame
surface portion
rotating electrical
degrees
electrical machine
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JP2008295194A (en
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克己 大畑
渡 広末
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

この発明は回転電機に係り、特に、フレーム構造に改良を加えた回転電機に関するものである。   The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine having an improved frame structure.

回転電機のフレーム構造に係る従来装置として、アーマチュアの振れ回りなどに起因する振動や騒音の発生を防止するために、ヨークの底部中央に圧入した軸受と、ブラケットの圧入した軸受とでアーマチュアを軸支する回転電機において、軸受を圧入する支持部の周辺に板厚の薄い肉薄部をプレス加工によって形成し、肉厚が相対的に厚くなる肉厚部との間に段部を形成した技術が提案されている（例えば、特許文献１参照）。   As a conventional device related to the frame structure of a rotating electrical machine, in order to prevent the occurrence of vibration and noise due to armature swinging, the armature is pivoted with a bearing press-fitted into the center of the bottom of the yoke and a bearing press-fitted with a bracket. In a rotating electrical machine to be supported, there is a technology in which a thin part with a thin plate thickness is formed by press working around a support part for press-fitting a bearing, and a step part is formed between the thick part with a relatively large thickness. It has been proposed (see, for example, Patent Document 1).

特開２００５−７３３１９号公報（要約の欄、図１）JP 2005-73319 A (summary column, FIG. 1)

特許文献１により提案された回転電機によれば、支持部の周囲の強度をプレス加工により加工硬化させることで底部の強度が増加し、アーマチュアの振れ回りによる振動や騒音の発生を防止できる効果があり、また、薄肉とすることで、板厚が減少する分だけフレーム内の空間を大きくすることができる効果がある。   According to the rotating electrical machine proposed by Patent Document 1, the strength of the bottom portion is increased by press hardening the strength around the support portion, and the effect of preventing the generation of vibration and noise due to armature swinging is obtained. In addition, by making it thin, there is an effect that the space in the frame can be increased as much as the plate thickness decreases.

しかし、上記のように構成されたフレーム構造においては、軸受支持部周囲の段部を形成するためのプレス金型構成が複雑であり、生産性の悪化、金型製造コストの増大を招くことになる。また、フレーム円管部と底面を繋ぐ角部が直角となっていることより、フレームがロータ側およびロータと反対側の両方に振動することができ、騒音悪化につながりやすい問題がある。   However, in the frame structure configured as described above, the configuration of the press mold for forming the stepped portion around the bearing support portion is complicated, leading to deterioration in productivity and an increase in mold manufacturing cost. Become. Moreover, since the corner | angular part which connects a flame | frame circular pipe part and a bottom face is a right angle, a flame | frame can vibrate to both a rotor side and the other side of a rotor, and there exists a problem which tends to lead to noise deterioration.

この発明では、上記のような問題を解決するためになされたもので、フレーム底面部の肉厚を均等のままとし、プレス金型構成を単純化し、生産性の悪化、金型製造コストの増大を抑制し、且つ回転電機の全長を長くすることなく振動、騒音対策が可能となるフレーム形状の回転電機を提供することを目的とする。   The present invention was made to solve the above-described problems, and the thickness of the bottom surface of the frame is kept uniform, the press mold configuration is simplified, the productivity is deteriorated, and the mold manufacturing cost is increased. It is an object of the present invention to provide a frame-shaped rotating electrical machine that can suppress vibration and noise without increasing the overall length of the rotating electrical machine.

この発明による回転電機は、有底筒形状に構成され、底面部にベアリングの支持部を備えたフレームを有する回転電機であって、上記有底筒形状のフレームは、鋼板のプレス加工により形成され、ステータまたはマグネットが固定される円管部と上記底面部をつなぐ角部の内角が７０度以上９０度未満であることを特徴とするものである。 A rotating electrical machine according to the present invention is a rotating electrical machine having a frame having a bottomed cylindrical shape and having a bearing support portion on a bottom surface portion, and the bottomed cylindrical frame is formed by pressing a steel plate. , it is characterized in that the inner angle of the corner portion connecting the circular tube portion and the bottom portion of the stator or the magnet is fixed is less than 70 degrees than 90 degrees.

この発明によれば、プレス金型構成を単純化し、生産性の悪化、金型製造コストの増大を抑制し、且つ回転電機の全長を長くすることなく振動、騒音対策が可能となるフレーム形状の回転電機を提供することができる。   According to the present invention, a frame shape that simplifies the press mold configuration, suppresses deterioration in productivity, suppresses increase in mold manufacturing cost, and can take measures against vibration and noise without increasing the overall length of the rotating electrical machine. A rotating electrical machine can be provided.

以下に添付図面を参照して、この発明に係る回転電機の好適な実施の形態を詳細に説明する。   Exemplary embodiments of a rotating electrical machine according to the present invention will be explained below in detail with reference to the accompanying drawings.

実施の形態１．
図１はこの発明の実施の形態１に係る回転電機、例えば、ブラシレスモータの断面図で
、図２はフレーム形状図である。
図１において、ブラシレスモータ１は、有底筒形状をしたフレーム２を備え、フレーム２の円管部２ａの内周にコイル巻線３が施されたステータ４が圧入等で固定されている。また、ステータ４の内周面と所定のギャップを介してロータ５が配設されている。ロータ５は、シャフト６に接着等で固定されたマグネット７を有しており、フレーム２に設けられたベアリングケース部８に保持されるベアリング９と、ハウジング１０に設けられたベアリングケース部１１に保持されるベアリング１２とによって回転自在に支持されている。また、フレーム２は鋼板のプレスによって形成されている。 Embodiment 1 FIG.
1 is a cross-sectional view of a rotary electric machine, for example, a brushless motor, according to Embodiment 1 of the present invention, and FIG. 2 is a frame shape view.
In FIG. 1, a brushless motor 1 includes a frame 2 having a bottomed cylindrical shape, and a stator 4 having a coil winding 3 applied to the inner periphery of a circular pipe portion 2a of the frame 2 is fixed by press-fitting or the like. A rotor 5 is disposed through a predetermined gap from the inner peripheral surface of the stator 4. The rotor 5 has a magnet 7 fixed to the shaft 6 by bonding or the like. The rotor 5 is supported by a bearing 9 held by a bearing case portion 8 provided on the frame 2 and a bearing case portion 11 provided on the housing 10. The bearing 12 is held so as to be rotatable. The frame 2 is formed by pressing a steel plate.

図２はフレーム形状図であって、フレーム２は、円管部２ａと底面部２ｂを繋ぐ角部の内角が９０度未満に構成されている。   FIG. 2 is a frame shape diagram, and the frame 2 is configured so that the inner angle of the corner portion connecting the circular tube portion 2a and the bottom surface portion 2b is less than 90 degrees.

実施の形態１に係る回転電機１は上記ように構成されている。そして、この回転電機１を駆動すると、ロータ５のシャフト６の先端５ａから伝わる取り付け機器側からの振動伝搬、ロータ５自身の磁気的振動、あるいはロータ５の回転アンバランスなどのロータ５の振れ回りによりフレーム２の底面部２ｂに振動が発生する。しかし、フレーム２の円管部２ａと底面部２ｂを繋ぐ角部の内角が９０度未満に構成されていることにより、底面部２ｂにロータ５と反対側へ変位するための荷重が増し、ロータ加振力による底面部２ｂのロータ５と反対側への振動が抑制され、振動、騒音の低減効果をもたらすことが出来る。   The rotating electrical machine 1 according to Embodiment 1 is configured as described above. When this rotating electrical machine 1 is driven, the vibration of the rotor 5 such as vibration propagation from the mounting device side transmitted from the tip 5 a of the shaft 6 of the rotor 5, magnetic vibration of the rotor 5 itself, or rotation unbalance of the rotor 5, etc. As a result, vibration is generated in the bottom surface 2b of the frame 2. However, since the inner angle of the corner portion connecting the circular tube portion 2a and the bottom surface portion 2b of the frame 2 is configured to be less than 90 degrees, the load for displacing the bottom surface portion 2b to the opposite side of the rotor 5 increases. The vibration of the bottom surface 2b due to the excitation force to the opposite side of the rotor 5 is suppressed, and the effect of reducing vibration and noise can be brought about.

また、実施の形態１に係る回転電機１のフレーム２の形状は、円管部２ａと底面部２ｂを繋ぐ角度が９０度に構成されている従来構造のフレームに対して、相違点が円管部２ａと底面部２ｂを繋ぐ角度のみであり、製造する際のプレス金型構成の変更及び追加工程なしに実現可能であり、生産性の悪化、金型製造コストの増大を生じさせることなく振動、騒音の低減効果をもたらすことが出来る。   Further, the shape of the frame 2 of the rotating electrical machine 1 according to the first embodiment is different from that of the conventional structure in which the angle connecting the circular tube portion 2a and the bottom surface portion 2b is 90 degrees. It is only an angle connecting the part 2a and the bottom part 2b, and can be realized without changing the press die configuration and additional steps when manufacturing, and without causing deterioration in productivity and increase in die manufacturing cost. , Noise reduction effect can be brought about.

また、別の効果として、図１に示すようなブラシレスモータにおいては、コイル巻線３が施されたステータ４のコイル端１３のフレーム底面部２ｂ側の端部位置は、マグネット７のフレーム底面部２ｂ側の端部位置より、フレーム底面部２ｂ側に位置するので、円管部２ａと底面部２ｂを繋ぐ角度の内角を９０度未満に構成することにより、ブラシレスモータ１の内部の空間を有効に利用することが出来、全長を長くすることなく振動、騒音の低減効果をもたらすことが出来る。   As another effect, in the brushless motor as shown in FIG. 1, the end position of the coil end 13 of the stator 4 to which the coil winding 3 is applied on the frame bottom surface portion 2 b side is the frame bottom surface portion of the magnet 7. Since it is located on the frame bottom surface portion 2b side from the end portion position on the 2b side, the internal space of the brushless motor 1 is made effective by configuring the inner angle of the angle connecting the circular tube portion 2a and the bottom surface portion 2b to less than 90 degrees. Therefore, it is possible to bring about an effect of reducing vibration and noise without increasing the overall length.

更に、フレーム２の円管部２ａと底面部２ｂを繋ぐ角度の内角は、９０度未満７０度以上が望ましく、７０度未満の場合には、コイル端１３のフレーム底面部２ｂ側の端部位置とフレーム２の底面部２ｂの空間が大きくなるため、全長が長くなる欠点が生じる。   Further, the inner angle of the angle connecting the circular tube portion 2a and the bottom surface portion 2b of the frame 2 is desirably less than 90 degrees and 70 degrees or more, and in the case of less than 70 degrees, the end position of the coil end 13 on the frame bottom surface portion 2b side. Since the space of the bottom surface portion 2b of the frame 2 is increased, there is a disadvantage that the entire length becomes longer.

実施の形態２．
図３はこの発明の実施の形態２に係る回転電機、例えば、ブラシ付モータの断面図で、図４はフレーム形状図である。
図３において、ブラシ付モータ３０は、有底筒形状をしたフレーム３１を備え、フレーム３１の円管部３１ａの内周にマグネット３２がホルダ３３を介して圧入等で固定されている。また、マグネット３２の内周面と所定のギャップを介してアーマチュア３４が配設されている。アーマチュア３４は、シャフト３５に固定した複数のティースにコイル巻線３６を施して形成されており、フレーム３１に設けられたベアリングケース部３７に保持されるベアリング３８と、ハウジング３９に設けられたベアリングケース部４０に保持されるベアリング４１によって回転自在に支持されている。また、フレーム３１は鋼板のプレスによって形成されている。 Embodiment 2. FIG.
3 is a cross-sectional view of a rotary electric machine, for example, a brush motor, according to Embodiment 2 of the present invention, and FIG. 4 is a frame shape view.
In FIG. 3, the brushed motor 30 includes a frame 31 having a bottomed cylindrical shape, and a magnet 32 is fixed to the inner periphery of a circular pipe portion 31 a of the frame 31 by a press fit or the like via a holder 33. In addition, an armature 34 is disposed through a predetermined gap from the inner peripheral surface of the magnet 32. The armature 34 is formed by applying a coil winding 36 to a plurality of teeth fixed to a shaft 35, a bearing 38 held by a bearing case portion 37 provided on the frame 31, and a bearing provided on a housing 39. A bearing 41 held by the case portion 40 is rotatably supported. The frame 31 is formed by pressing a steel plate.

図４はフレーム形状図であって、フレーム３１は、円管部３１ａと底面部３１ｂを繋ぐ
角部の内角が９０度を超える角度で構成されている。 FIG. 4 is a frame shape diagram, and the frame 31 is configured such that the inner angle of the corner portion connecting the circular pipe portion 31a and the bottom surface portion 31b exceeds 90 degrees.

実施の形態２に係る回転電機３０は上記ように構成されている。そして、この回転電機３０を駆動すると、アーマチュア３４のシャフト３５の先端３４ａから伝わる取り付け機器側からの振動伝搬、アーマチュア３４自身の磁気的振動、あるいはアーマチュア３４の回転アンバランスなどのアーマチュア３４の振れ回りによりフレーム底面部３１ｂの振動が発生する。しかし、フレーム３１の円管部３１ａと底面部３１ｂを繋ぐ角部の内角が９０度を超える角度に構成されていることにより、底面部３１ｂにアーマチュア３４側へ変位するための荷重が増し、アーマチュア加振力による底面部３１ｂのアーマチュア３４側への振動が抑制され、振動、騒音の低減効果をもたらすことが出来る。   The rotating electrical machine 30 according to the second embodiment is configured as described above. When the rotating electrical machine 30 is driven, vibration of the armature 34 such as vibration propagation from the attachment device side transmitted from the tip 34a of the shaft 35 of the armature 34, magnetic vibration of the armature 34 itself, or rotation unbalance of the armature 34, etc. As a result, vibration of the frame bottom surface portion 31b occurs. However, since the inner angle of the corner portion connecting the circular pipe portion 31a and the bottom surface portion 31b of the frame 31 is configured to exceed 90 degrees, the load for displacing the bottom surface portion 31b toward the armature 34 increases, and the armature Vibration to the armature 34 side of the bottom surface portion 31b due to the excitation force is suppressed, and an effect of reducing vibration and noise can be brought about.

実施の形態２に係る回転電機３０のフレーム３１の形状は、実施の形態１と同様、円管部３１ａと底面部３１ｂを繋ぐ角度が９０度に構成されている従来構造のフレームに対して、相違点が円管部３１ａと底面部３１ｂを繋ぐ角度のみであり、製造する際のプレス金型構成の変更及び追加工程なしに実現可能であり、生産性の悪化、金型製造コストの増大を生じさせることなく振動、騒音の低減効果をもたらすことが出来る。   The shape of the frame 31 of the rotating electrical machine 30 according to the second embodiment is the same as that of the first embodiment, with respect to the frame of the conventional structure in which the angle connecting the circular pipe portion 31a and the bottom surface portion 31b is 90 degrees. The only difference is the angle connecting the circular pipe portion 31a and the bottom surface portion 31b, which can be realized without changing the press die configuration during manufacturing and without additional steps, resulting in reduced productivity and increased die manufacturing cost. The effect of reducing vibration and noise can be brought about without causing it.

また、別の効果として、図３のようなブラシ付きモータ３０においては、コイル巻線３６のコイル端４２におけるフレーム底面部３１ｂ側の端部位置は、マグネット３２のフレーム底面部３１ｂ側の端部位置より、フレーム底面部３１ｂ側に位置するので、円管部３１ａと底面部３１ｂを繋ぐ角度の内角が９０度を超える角度に構成することで、ブラシ付きモータ３０の内部の空間を有効に利用することが出来、全長を長くすることなく振動、騒音の低減効果をもたらすことが出来る。 As another effect, in the brushed motor 30 as shown in FIG. 3, the end position on the frame bottom surface portion 31 b side of the coil end 42 of the coil winding 36 is the end portion on the frame bottom surface portion 31 b side of the magnet 32. Since it is located on the frame bottom surface portion 31b side from the position, the internal angle of the angle connecting the circular tube portion 31a and the bottom surface portion 31b exceeds 90 degrees, so that the space inside the brushed motor 30 is effectively used. This can reduce the vibration and noise without increasing the overall length.

更に、フレーム３１の円管部３１ａと底面部３１ｂを繋ぐ角度の内角は、９０度を超え、１１０度以下の角度が望ましく、１１０度以上の場合には、コイル端４２のフレーム底面部３１ｂ側の端部位置とフレーム３１の底面部３１ｂの空間が大きくなるため、全長が長くなる欠点を生じる。   Further, the inner angle of the angle connecting the circular pipe portion 31a and the bottom surface portion 31b of the frame 31 is preferably more than 90 degrees and not more than 110 degrees, and when it is 110 degrees or more, the coil end 42 side of the frame bottom surface portion 31b Since the space between the end portion position and the bottom surface portion 31b of the frame 31 is increased, there is a disadvantage that the entire length becomes longer.

実施の形態３．
次に実施の形態３について説明する。図５は実施の形態３に係る回転電機、例えば、ブラシレスモータのフレーム形状図である。
ブラシレスモータの全長に取り付け上の制約が無ければ、図１に示すブラシレスモータ１に、図５に示す形状のフレーム５０、即ち、円管部５０ａと底面部５０ｂを繋ぐ角度の内角が９０度を超える角度のフレーム５０を織り込んでも、生産性の悪化、金型製造コストの増大を生じさせることなく振動、騒音の低減効果をもたらすことが出来る。 Embodiment 3 FIG.
Next, a third embodiment will be described. FIG. 5 is a frame shape diagram of a rotating electrical machine according to Embodiment 3, for example, a brushless motor.
If there are no restrictions on the overall length of the brushless motor, the brushless motor 1 shown in FIG. 1 has a frame 50 having the shape shown in FIG. 5, that is, the inner angle of the angle connecting the circular pipe portion 50a and the bottom surface portion 50b is 90 degrees. Even if the frame 50 having an angle exceeding the limit is incorporated, it is possible to bring about an effect of reducing vibration and noise without causing deterioration in productivity and an increase in mold manufacturing cost.

実施の形態４．
次に実施の形態４について説明する。図６は実施の形態４に係る回転電機、例えば、ブラシ付きモータのフレーム形状図である。
ブラシ付きモータの全長に取り付け上の制約が無ければ、図３のブラシ付きモータ３０に、図６に示す形状のフレーム６０、即ち、円管部６０ａと底面部６０ｂを繋ぐ角度の内角が９０度未満であるフレーム６０を織り込んでも、生産性の悪化、金型製造コストの増大を生じさせることなく振動、騒音の低減効果をもたらすことが出来る。 Embodiment 4 FIG.
Next, a fourth embodiment will be described. FIG. 6 is a frame shape diagram of a rotating electrical machine according to the fourth embodiment, for example, a motor with a brush.
If there is no mounting restriction on the overall length of the brushed motor, the inner angle of the angle connecting the frame 60 having the shape shown in FIG. 6, that is, the circular pipe portion 60a and the bottom surface portion 60b, to the brushed motor 30 of FIG. 3 is 90 degrees. Even if the frame 60 that is less than the above is incorporated, it is possible to bring about an effect of reducing vibration and noise without causing deterioration in productivity and increase in mold manufacturing cost.

この発明に係る回転電機は、油圧ポンプを備えた電動油圧式パワーステアリング装置を駆動する回転電機に利用できる。   The rotating electrical machine according to the present invention can be used for a rotating electrical machine that drives an electrohydraulic power steering apparatus including a hydraulic pump.

この発明の実施の形態１に係る回転電機の断面図である。It is sectional drawing of the rotary electric machine which concerns on Embodiment 1 of this invention. 図１に示す回転電機のフレーム形状図である。It is a frame shape figure of the rotary electric machine shown in FIG. この発明の実施の形態２に係る回転電機の断面図である。It is sectional drawing of the rotary electric machine which concerns on Embodiment 2 of this invention. 図３に示す回転電機のフレーム形状図である。It is a frame shape figure of the rotary electric machine shown in FIG. 実施の形態３に係る回転電機のフレーム形状図である。FIG. 6 is a frame shape diagram of a rotating electrical machine according to a third embodiment. 実施の形態４に係る回転電機のフレーム形状図である。FIG. 6 is a frame shape diagram of a rotating electrical machine according to a fourth embodiment.

符号の説明Explanation of symbols

１ ブラシレスモータ
２，３１，５０，６０ フレーム
２ａ，３１ａ，５０ａ，６０ａ 円管部
２ｂ，３１ｂ，５０ｂ，６０ｂ 底面部
３，３６ コイル巻線
４ ステータ
５ ロータ
６，３５ シャフト
７，３２ マグネット
８，１１，３７，４０ ベアリングケース部
９，１２，３８，４１ ベアリング
１０，３９ ハウジング
１３，４２ コイル端
３０ ブラシ付モータ
３３ ホルダ
３４ アーマチュア DESCRIPTION OF SYMBOLS 1 Brushless motor 2, 31, 50, 60 Frame 2a, 31a, 50a, 60a Round pipe part 2b, 31b, 50b, 60b Bottom face part 3, 36 Coil winding 4 Stator 5 Rotor 6, 35 Shaft 7, 32 Magnet 8, 11, 37, 40 Bearing case part 9, 12, 38, 41 Bearing 10, 39 Housing 13, 42 Coil end 30 Brushed motor 33 Holder 34 Armature

Claims (1)

有底筒形状に構成され、底面部にベアリングの支持部を備えたフレームを有する回転電機であって、上記有底筒形状のフレームは、鋼板のプレス加工により形成され、ステータまたはマグネットが固定される円管部と上記底面部をつなぐ角部の内角が７０度以上９０度未満であることを特徴とする回転電機。 A rotating electric machine having a bottomed cylindrical shape and having a frame with a bearing support on the bottom surface, wherein the bottomed cylindrical frame is formed by pressing a steel plate, and a stator or magnet is fixed to the rotating electric machine. rotating electric machine, wherein the internal angle of the circular pipe portion and the corner portion connecting the bottom portion is less than 70 degrees than 90 degrees that.
JP2007137865A 2007-05-24 2007-05-24 Rotating electric machine Expired - Fee Related JP4657249B2 (en)

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JP4657249B2 true JP4657249B2 (en) 2011-03-23

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093506U (en) * 1973-12-28 1975-08-06
JPS5162304A (en) * 1974-11-29 1976-05-29 Hitachi Ltd TEISOON JUDODENDOKI
JPS6173538A (en) * 1984-09-14 1986-04-15 Hitachi Ltd Miniature motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093506U (en) * 1973-12-28 1975-08-06
JPS5162304A (en) * 1974-11-29 1976-05-29 Hitachi Ltd TEISOON JUDODENDOKI
JPS6173538A (en) * 1984-09-14 1986-04-15 Hitachi Ltd Miniature motor

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