JPH022051Y2 - - Google Patents

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案はモータ等の回転電機の改善に関するも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to improvement of rotating electric machines such as motors.

〔従来技術及び考案が解決しようとする問題点〕[Problems to be solved by the prior art and the invention]

従来における回転電機は、第１図イ，ロに図示
する如く、金属製のブラシホルダ１を絶縁基板２
を介装して金属製基板３に取付け、該金属製基板
３の突出部３１をヨーク４とブラケツト５間に挾
み込んで固定していた。その為、モータの作動
中、コミユテータ６とブラシ７間に発生する機械
的振動は、ブラシホルダ１から前記金属製基板
３、そしてヨーク４、ブラケツト５へとモータ全
体に伝達されて構成部材の共振振動等が誘引さ
れ、騒音発生の原因となつていた。 In a conventional rotating electric machine, a metal brush holder 1 is mounted on an insulating substrate 2, as shown in FIG.
The metal substrate 3 was attached to the metal substrate 3 with the metal substrate 3 interposed therebetween, and the protrusion 31 of the metal substrate 3 was inserted between the yoke 4 and the bracket 5 and fixed. Therefore, during the operation of the motor, mechanical vibrations generated between the commutator 6 and the brush 7 are transmitted to the entire motor from the brush holder 1 to the metal substrate 3, then to the yoke 4 and bracket 5, causing resonance of the constituent members. Vibrations were induced, causing noise.

〔問題を解決するための手段〕[Means to solve the problem]

本考案は、上記の如き実情に鑑みこれらの欠点
を一掃することが出来る回転電機を提供すること
を目的として創案されたものであり、殊に、 断面コ字状のブラシホルダケースと該ブラシホ
ルダケースの開口部を覆うブラシホルダベースと
を有する金属製ブラシホルダと、 該金属製ブラシホルダを支持する金属製基板
と、 該金属製基板を支持するケーシングと、 前記金属製ブラシホルダと前記金属製基板との
間及び該金属製基板と前記ケーシングとの間に、
それぞれ介装される第１及び第２の弾性部材とを
有する回転電機であつて、 前記ブラシホルダケースは、その開口部両側
に、側方に延びる爪を有し、 前記第１弾性部材は、両端に立壁を有する凹状
の部材であつて、該立壁に溝が形成されており、 前記金属製基板は、前記ブラシホルダケースの
爪に対応する位置に切起し爪を有すると共に、外
周に突出部を有し、 前記第２弾性部材は溝を有し、 前記ケーシングは、筒状のヨークと該筒状ヨー
クの開口を覆うエンドブラケツトとを有し、 前記ブラシホルダケースの前記開口側に前記ブ
ラシホルダベースが係合され、 前記第１弾性部材の溝に前記ブラシホルダケー
スの爪が挿入されて、両者が係止されると共に両
者の間に前記ブラシホルダベースが挾持され、 前記金属製基板上に前記第１弾性部材が載置さ
れると共に、前記金属製基板の爪が前記第１弾性
部材の立壁を巻込むよう折り曲げられ、前記ブラ
シホルダケースの爪が前記第１弾性部材を介して
挾持され、 前記金属製基板の突出部が、前記第２弾性部材
の溝に挿入され、前記第２弾性部材を介して前記
ヨークと前記エンドブラケツト間に挾持されてな
ることを特徴とするものである。 The present invention was devised in view of the above-mentioned circumstances with the aim of providing a rotating electric machine that can eliminate these drawbacks, and in particular, provides a brush holder case with a U-shaped cross section and the brush holder. a metal brush holder having a brush holder base that covers an opening of a case; a metal substrate that supports the metal brush holder; a casing that supports the metal substrate; and the metal brush holder and the metal brush holder. between the substrate and between the metal substrate and the casing,
A rotating electric machine having first and second elastic members interposed therein, wherein the brush holder case has claws extending laterally on both sides of an opening thereof, and the first elastic member is It is a concave member having standing walls at both ends, and grooves are formed in the standing walls, and the metal substrate has cut and raised claws at positions corresponding to the claws of the brush holder case, and protrudes from the outer periphery. the second elastic member has a groove, the casing has a cylindrical yoke and an end bracket that covers an opening of the cylindrical yoke, and the second elastic member has a groove on the opening side of the brush holder case. The brush holder base is engaged, the claw of the brush holder case is inserted into the groove of the first elastic member, and both are locked, and the brush holder base is held between them, and the metal substrate The first elastic member is placed thereon, the claws of the metal substrate are bent to wrap around the vertical walls of the first elastic member, and the claws of the brush holder case are bent through the first elastic member. The protruding portion of the metal substrate is inserted into the groove of the second elastic member, and is sandwiched between the yoke and the end bracket via the second elastic member. be.

そして本考案は、この構成によつて、ブラシの
機械的振動の伝達経路を第１及び第２の弾性部材
で遮断し、騒音を低減させたものである。 According to the present invention, with this configuration, the transmission path of the mechanical vibration of the brush is blocked by the first and second elastic members, thereby reducing noise.

〔実施例〕〔Example〕

次に、本考案の一実施例を図面に基づき説明す
る。第２図、イは、一対のブラシを有するブラシ
装置の分解斜視図で、８はピグテール９が植設さ
れたブラシである。１０は金属板をプレス成形し
て断面コ字状に製作したブラシホルダケースで、
上部にピクテール９が挿通される穴１０１、下部
開口部両側に側方へ延びる４つの爪１０２を有す
る。１１は前記ブラシホルダケース１０の下部開
口部を覆うよう前記爪１０２に係合する４つの切
欠き部１１１を設けた金属板からなるブラシホル
ダベースである。１２は第１弾性部材であり、両
端に立壁１２１を有する凹状ゴム部材であつて、
該立壁内面に４つの溝１２２を有し、外面に溝１
２２に対応して凹部１２３を有する。１３は金属
板をプレス成形して製作した基板である。金属製
基板１３は中央にブラシホルダが組み込まれる段
部１３１を成形して、両端に上方に向けて切起し
爪１３２を設けると共に、金属製基板１３の剛性
を高めるため両側部１３３を折り曲げ、外周４箇
所に突出部１３４を設け、さらに第１弾性部材を
金属製基板１３の段部１３１に組み込まれる際、
位置決めとなる突き当り部１３５を設けたもので
ある。１４は１字状に成形したゴム状の第２弾性
部材で、中央部に凹溝１４１を設け、４箇所に膨
出部１４２を形成したものである。第２図ロに示
す１５は円筒状のヨークであり、内周４箇所に第
２弾性部材を位置決め支持する打出し部１５１を
有し、円筒状ヨーク開口縁にはエンドブラケツト
（図示しない）をかしめ固定するためのかしめ凸
起１５２が設けられている。 Next, an embodiment of the present invention will be described based on the drawings. FIG. 2A is an exploded perspective view of a brush device having a pair of brushes, and 8 is a brush with a pigtail 9 implanted therein. 10 is a brush holder case made by press-molding a metal plate and having a U-shaped cross section.
It has a hole 101 in the upper part through which the pictail 9 is inserted, and four claws 102 extending laterally on both sides of the lower opening. Reference numeral 11 denotes a brush holder base made of a metal plate provided with four notches 111 that engage with the claws 102 so as to cover the lower opening of the brush holder case 10. 12 is a first elastic member, which is a concave rubber member having vertical walls 121 at both ends,
The vertical wall has four grooves 122 on its inner surface, and a groove 1 on its outer surface.
It has a recess 123 corresponding to 22. 13 is a substrate manufactured by press-molding a metal plate. The metal substrate 13 is formed with a stepped portion 131 in the center into which the brush holder is installed, and upwardly cut and raised claws 132 are provided at both ends, and both side portions 133 are bent to increase the rigidity of the metal substrate 13. Protrusions 134 are provided at four locations on the outer periphery, and when the first elastic member is incorporated into the stepped portion 131 of the metal substrate 13,
An abutting portion 135 is provided for positioning. Reference numeral 14 denotes a rubber-like second elastic member formed into a single character shape, and has a groove 141 in the center and bulges 142 at four locations. Reference numeral 15 shown in FIG. 2B is a cylindrical yoke, which has four protruding parts 151 on its inner circumference for positioning and supporting the second elastic member, and an end bracket (not shown) at the opening edge of the cylindrical yoke. A caulking protrusion 152 is provided for caulking and fixing.

以上の構成部品は、つぎの様に組立られる。ま
ず、ブラシ８をブラシホルダケース１０に挿入
し、そしてブラシホルダケース１０の下部開口部
にブラシホルダベース１１を突き当て、爪１０２
に切欠き部１１１を係合した後に、ブラシホルダ
ケース１０の４つの爪１０２をそれぞれ第１弾性
部材１２の溝１２２に差し込み三者を一体化す
る。そしてこれを金属製基板１３の段部１３１に
嵌め込む。この時、突き当り部１３５は位置決め
の作用をする。次に、金属製基板１３の４つの切
起し爪１３２を、それぞれブラシホルダケース１
０の爪１０２に対応する位置、つまり第１弾性部
材１２の凹部１２３に巻き込むように折り曲げ、
これにより、ブラシホルダケース１０の爪１０２
が第１弾性部材１２を介して弾性的に挾持された
構造となる。次に、金属製基板１３の外周４箇所
の突出部１３４を第２弾性部材１４の凹溝１４１
に差し込んで、金属製基板１３に第２弾性部材を
装着してブラシ装置が完成する。このようなブラ
シ装置は、第２図ハに図示する如く、ヨーク１５
の打出し部１５１を第２弾性部材の一方の２つの
膨出部１４２で挾んで位置決めし、ヨーク１５に
装着される。この際、他方の２つの膨出部１４２
はヨーク１５の開口縁より若干外側に突出してい
る。最後に、ヨーク１５の開口部にエンドブラケ
ツト（図示しない）を組付け、ヨーク１５開口縁
の凸起１５２をかしめ両者を固定するが、この
時、ヨーク１５開口縁より突出した第２弾性部材
１４の膨出部１４２がエンドブラケツトにより押
圧され、金属製基板１３の突出部１３４が第２弾
性部材１４を介してエンドブラケツトとヨーク１
５の打出し部１５１とで挾持される。 The above components are assembled as follows. First, the brush 8 is inserted into the brush holder case 10, and the brush holder base 11 is butted against the lower opening of the brush holder case 10.
After engaging the notches 111 with the brush holder case 10, the four claws 102 of the brush holder case 10 are respectively inserted into the grooves 122 of the first elastic member 12 to integrate the three parts. Then, this is fitted into the stepped portion 131 of the metal substrate 13. At this time, the abutting portion 135 functions for positioning. Next, each of the four cut and raised claws 132 of the metal substrate 13 is attached to the brush holder case 1.
0, so as to wrap around the recess 123 of the first elastic member 12,
As a result, the claw 102 of the brush holder case 10
are elastically held together via the first elastic member 12. Next, the protrusions 134 at four locations on the outer periphery of the metal substrate 13 are inserted into the grooves 141 of the second elastic member 14.
The second elastic member is attached to the metal substrate 13, and the brush device is completed. Such a brush device includes a yoke 15 as shown in FIG.
The embossed portion 151 of the second elastic member is sandwiched between the two bulged portions 142 of the second elastic member for positioning, and then mounted on the yoke 15. At this time, the other two bulges 142
protrudes slightly outward from the opening edge of the yoke 15. Finally, an end bracket (not shown) is assembled to the opening of the yoke 15, and the protrusion 152 on the edge of the opening of the yoke 15 is caulked to fix both. At this time, the second elastic member 14 protruding from the opening edge of the yoke 15 is fixed. The bulging portion 142 of the metal substrate 13 is pressed by the end bracket, and the protruding portion 134 of the metal substrate 13 is connected to the end bracket and the yoke 1 via the second elastic member 14.
It is held between the embossing portion 151 of No. 5.

このようにして完成した回転電機は、作動中、
ブラシ８が回転するコミユテータに接触して、ブ
ラシ８に機械的振動が発生するが、その振動は第
１及び第２の弾性部材１２，１４に吸収されて、
伝達経路が遮断され、騒音が減少する。第３図、
イ，ロは、従来品との騒音差を比較するスペクト
ル図で、横軸を周波数（０〜20000Hz）、縦軸を騒
音レベルとして電圧で表したものである。同レベ
ルでグラフ値を比較した場合、3000Hz、18000Hz
付近に効果がみられる。特に3000Hz付近は聴感に
対して大きく作用する所であり、この付近はレベ
ル値以上の効果を出している。又、全域にわたつ
ても、従来例に比べ騒音レベルは低くなつてお
り、本考案の効果が出ている。第３図、ハは、使
用頻度の多い20000rpm近辺の騒音レベルを従来
品と比較したもので、５〜8dB下がつている。 The rotating electrical machine completed in this way is in operation,
When the brush 8 comes into contact with the rotating commutator, mechanical vibration is generated in the brush 8, but the vibration is absorbed by the first and second elastic members 12 and 14.
The transmission path is blocked and noise is reduced. Figure 3,
A and B are spectrum diagrams comparing the noise difference with conventional products, where the horizontal axis represents frequency (0 to 20,000 Hz) and the vertical axis represents noise level, expressed in voltage. When comparing graph values at the same level, 3000Hz and 18000Hz
Effects can be seen in the vicinity. In particular, the area around 3000Hz has a large effect on the sense of hearing, and the area around this area has an effect that exceeds the level value. Moreover, the noise level is lower than that of the conventional example even over the entire area, demonstrating the effectiveness of the present invention. Figure 3, C, compares the noise level around 20,000 rpm, which is frequently used, with the conventional product, and it is 5 to 8 dB lower.

〔作用効果〕[Effect]

以上の通り、本考案はブラシに発生する機械的
振動を、まずブラシホルダと基板間に介装した第
１弾性部材により吸収し、さらにケーシングに伝
わる振動を基板とケーシング間に介装した第２弾
性部材により吸収するようにしたもので、ブラシ
が振動のモータ全体に伝達されて構成部材の共振
振動等を誘引することがなく、騒音低減させるこ
とができる。 As described above, the present invention absorbs the mechanical vibrations generated in the brush by the first elastic member interposed between the brush holder and the substrate, and further absorbs the vibrations transmitted to the casing by the second elastic member interposed between the substrate and the casing. Since the vibration is absorbed by the elastic member, the brush does not transmit the vibration to the entire motor and induce resonance vibration of the component members, thereby reducing noise.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、イは、従来のブラシ装置の平面図。第
１図、ロは、従来のブラシ装置が装着されたモー
タの部分断面図。第２図、イは、本考案に係る回
転電機のブラシ装置の分解斜視図。第２図、ロ
は、本考案に係る回転電機のヨークの部分斜視
図。第２図、ハは、本考案に係るブラシ装置をヨ
ークに組付た状態を示す部分斜視図。第３図、イ
は、従来品の騒音を示すスペクトル図。第３図、
ロは、本考案の回転電機の騒音を示すスペクトル
図。第３図ハは、従来品と本考案との各回転数に
於ける騒音レベル差を示す図。 １：ブラシホルダ、２：絶縁基板、３：金属製
基板、３１：突出部、４：ヨーク、５：ブラケツ
ト、６：コミユテータ、７：ブラシ、８：ブラ
シ、９：ピグテール、１０：ブラシホルダケー
ス、１０１：穴、１０２：爪、１１：ブラシホル
ダベース、１１１：切欠き部、１２：第１弾性部
材、１２１：立壁、１２２：溝、１２３：凹部、
１３：金属製基板１３１：段部、１３２：切起し
爪、１３３：両側部、１３４：突出部、１３５：
突き当り部、１４：第２弾性部材、１４１：凹
溝、１４２：膨出部、１５：ヨーク、１５１：打
出し部、１５２：凸起。 FIG. 1A is a plan view of a conventional brush device. FIG. 1B is a partial sectional view of a motor equipped with a conventional brush device. FIG. 2A is an exploded perspective view of a brush device for a rotating electric machine according to the present invention. FIG. 2B is a partial perspective view of the yoke of the rotating electric machine according to the present invention. FIG. 2C is a partial perspective view showing a state in which the brush device according to the present invention is assembled to a yoke. FIG. 3A is a spectrum diagram showing the noise of the conventional product. Figure 3,
B is a spectrum diagram showing the noise of the rotating electric machine of the present invention. FIG. 3C is a diagram showing the noise level difference at each rotation speed between the conventional product and the present invention. 1: Brush holder, 2: Insulating board, 3: Metal board, 31: Projection, 4: Yoke, 5: Bracket, 6: Commutator, 7: Brush, 8: Brush, 9: Pigtail, 10: Brush holder case , 101: hole, 102: claw, 11: brush holder base, 111: notch, 12: first elastic member, 121: vertical wall, 122: groove, 123: recess,
13: Metal substrate 131: Stepped portion, 132: Cut and raised claw, 133: Both sides, 134: Projection, 135:
Abutting portion, 14: second elastic member, 141: groove, 142: bulging portion, 15: yoke, 151: protruding portion, 152: protrusion.

Claims (1)

【実用新案登録請求の範囲】 断面コ字状のブラシホルダケース１０と該ブラ
シホルダケース１０の開口部を覆うブラシホルダ
ベース１１とを有する金属製ブラシホルダと、 該金属製ブラシホルダを支持する金属製基板１
３と、 該金属製基板１３を支持するケーシングと、 前記金属製ブラシホルダと前記金属製基板１３
との間及び該金属製基板１３と前記ケーシングと
の間に、それぞれ介装される第１１２及び第２の
弾性部材１４とを有する回転電機であつて、 前記ブラシホルダケース１０は、その開口部両
側に、側方に延びる爪１０２を有し、 前記第１弾性部材１２は、両端に立壁１２１を
有する凹状の部材であつて、該立壁１２１に溝１
２２が形成されており、 前記金属製基板１３は、前記ブラシホルダケー
ス１０の爪１０２に対応する位置に切起し爪１３
２を有すると共に、外周に突出部１３４を有し、 前記第２弾性部材１４は溝１４１を有し、 前記ケーシングは、筒状のヨーク１５と該筒状
ヨーク１５の開口を覆うエンドブラケツトとを有
し、 前記ブラシホルダケース１０の前記開口側に前
記ブラシホルダベース１１が係合され、 前記第１弾性部材１２の溝１２２に前記ブラシ
ホルダケース１０の爪１０２が挿入されて、両者
が係止されると共に両者の間に前記ブラシホルダ
ベース１１が挾持され、 前記金属製基板１３上に前記第１弾性部材１２
が載置されると共に、前記金属製基板１３の爪１
３２が前記第１弾性部材１２の立壁１２１を巻込
むよう折り曲げられ、前記ブラシホルダケース１
０の爪１０２が前記第１弾性部材１２を介して挾
持され、 前記金属製基板１３の突出部１３４が、前記第
２弾性部材１４の溝１４１に挿入され、前記第２
弾性部材１４を介して前記ヨーク１５と前記エン
ドブラケツト間に挾持されてなることを特徴とす
る回転電機。[Claims for Utility Model Registration] A metal brush holder having a brush holder case 10 having a U-shaped cross section and a brush holder base 11 that covers an opening of the brush holder case 10, and a metal supporting the metal brush holder. manufactured board 1
3; a casing that supports the metal substrate 13; the metal brush holder and the metal substrate 13;
The brush holder case 10 is a rotating electric machine having a first elastic member 112 and a second elastic member 14 interposed between the metallic substrate 13 and the casing, respectively. The first elastic member 12 has claws 102 extending laterally on both sides, and the first elastic member 12 is a concave member having standing walls 121 at both ends, and grooves are formed in the standing walls 121.
22 are formed, and the metal substrate 13 has a cut-and-raised claw 13 at a position corresponding to the claw 102 of the brush holder case 10.
2 and a protrusion 134 on the outer periphery, the second elastic member 14 has a groove 141, and the casing has a cylindrical yoke 15 and an end bracket that covers the opening of the cylindrical yoke 15. The brush holder base 11 is engaged with the opening side of the brush holder case 10, and the claws 102 of the brush holder case 10 are inserted into the grooves 122 of the first elastic member 12, so that both are locked. and the brush holder base 11 is held between the two, and the first elastic member 12 is placed on the metal substrate 13.
is placed, and the claw 1 of the metal substrate 13 is
32 is bent so as to wrap around the vertical wall 121 of the first elastic member 12, and the brush holder case 1
0 claws 102 are held via the first elastic member 12, and the protrusion 134 of the metal substrate 13 is inserted into the groove 141 of the second elastic member 14, and the second
A rotating electrical machine characterized in that it is held between the yoke 15 and the end bracket via an elastic member 14.