JP2004332818A - Electric valve - Google Patents

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Publication number
JP2004332818A
JP2004332818A JP2003129037A JP2003129037A JP2004332818A JP 2004332818 A JP2004332818 A JP 2004332818A JP 2003129037 A JP2003129037 A JP 2003129037A JP 2003129037 A JP2003129037 A JP 2003129037A JP 2004332818 A JP2004332818 A JP 2004332818A
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JP
Japan
Prior art keywords
lid member
stator coil
coil assembly
locking piece
case
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JP2003129037A
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Japanese (ja)
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JP4246541B2 (en
Inventor
Takashi Hirakawa
尚 平川
Mineo Kinoshita
峰夫 木下
Morio Kaneko
守男 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2003129037A priority Critical patent/JP4246541B2/en
Publication of JP2004332818A publication Critical patent/JP2004332818A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain the sufficient fitting strength, and to surely and accurately fix a stator coil assembly to a required circumferential fitting position without generating looseness. <P>SOLUTION: The stator coil assembly is fixed to a main body by engagement of a fork-like engaging piece 42, a non-return engaging piece 43 and a pair of looseness preventing pieces 44 and 45 in four positions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、電動弁に関し、特に、ステッピングモータ駆動の電動弁に関するものである。
【0002】
【従来の技術】
有底円筒形状のケースの開口端に、当該ケースを密閉に蓋する円盤状の蓋部材(ベースプレート)が固着固定され、ケース内に、弁体、ステッピングモータのロータが配置され、ケースの外周にステッピングモータのステータコイル組立体がはめ込み装着され、蓋部材側に弁ポートが設けられ、ステッピングモータによって弁体を駆動する電動弁は知られている(例えば、特許文献1)。
【0003】
上述のようなステッピングモータ駆動の電動弁では、位相合わせ、反転相合わせ、弁開点位置合わせ等のために、円筒状のステータコイル組立体がケース外周に対して周方向(磁極配置方向)に取付決めされた位置に装着される必要がある。
【0004】
この周方向の位置決め構造としては、ステータコイル組立体に一体的に設けられた位置決め片の先端凸形状部を弁ハウジングの外壁に形成された位置決め凹部に係合させるもの(例えば、特許文献2、3)、ステータコイル組立体に取り付けられた二股状係止片を弁ハウジングに固定の管継手に跨ぎ係合させるもの(例えば、特許文献3)、ステータコイル組立体に取り付けられた二股状係止片を弁ハウジングの外壁に打ち込み装着された位置決めピンに係合させるもの(例えば、特許文献3、4)など、種々、知られている。
【0005】
【特許文献1】
特開2002−147900号公報
【特許文献2】
特開平8−312823号公報
【特許文献3】
特開2000−74245号公報
【特許文献4】
特開2001−32954号公報
【0006】
【発明が解決しようとする課題】
ステータコイル組立体に設けられた位置決め片の先端凸形状部を弁ハウジング外壁の位置決め凹部に係合させるものは、回転耐力の不足、不安定性があり、充分な取付強度(位置保持強度)を得る構造にすることが難しい。また、この凹凸係合だけで、ステータコイル組立体の抜け止め(軸線方向位置決め)を行おうとしても、充分な抜け止め強度を確保することが難しい。
【0007】
ステータコイル組立体に取り付けられた二股状係止片を弁ハウジングに固定の管継手に跨ぎ係合させるものでは、管継手の位置によってステータコイル組立体の周方向位置が一義的に決まり、ステータコイル組立体のリード線引き出し位置(コネクタ位置)を変更可能な構造にすることができない。また、管継手の取付精度を高めないと、ステータコイル組立体の所要の周方向取付位置精度を得ることができない。
【0008】
また、ステータコイル組立体に取り付けられた二股状係止片を管継手に跨ぎ係合させただけのものや、ステータコイル組立体に取り付けられた二股状係止片を弁ハウジングの外壁に打ち込み装着された位置決めピンの両側に係合させるだけものでは、ステータコイル組立体をケース外周に組み付けた状態でのがた付きをなくすことが難しく、組付精度が悪化し、騒音を生じる原因になる。
【0009】
また、目視しないと誤った周方向位置にステータコイル組立体を挿入できてしまうものや、挿入後に回転させて位置決めするものでは、ステータコイル組立体を誤った位置に固定してしまう可能性があり、タンパプルーフに関して配慮が成されていない。
【0010】
この発明は、上述の如き問題点を解消するためになされたもので、充分な取付強度を得ることができると共に、ステータコイル組立体を所要の周方向取付位置に、がた付きを生じることなく確実に精度よく固定でき、また、ステータコイル組立体を誤った位置に固定してしまう可能性を排除し、タンパプルーフをなされた電動弁を提供することを目的としている。
【0011】
【課題を解決するための手段】
上述の目的を達成するために、この発明による電動弁は、有底円筒形状のケースと、前記ケースの開口端に固着されて当該ケースを密閉に蓋する円盤状の蓋部材とを有し、前記ケース内に、弁体、ステッピングモータのロータが配置され、前記ケースの外周に前記ステッピングモータの円筒形状のステータコイル組立体がはめ込み装着され、前記蓋部材側に弁ポートが設けられ、前記ステッピングモータによって前記弁体を駆動する電動弁において、前記蓋部材の外周部に突起部が突出形成され、前記ステータコイル組立体に、前記突起部を両側から挟むように前記突起部に二股係合する二股状係止片と、前記蓋部材の外周部に軸線方向に逆止係合する逆止係合爪を含む逆止係合片と、前記蓋部材の外周部に弾力的に当接する一対のがた付き防止片とが設けられている。
【0012】
この発明による電動弁によれば、ステータコイル組立体に取り付けられた二股状係止片が、蓋部材の外周部に突出形成された突起部を両側から挟み込むように、突起部に二股係合するから、凹凸係合に比して、ステータコイル組立体がケースと共に本体側をなす蓋部材に充分な取付強度をもって周方向位置決め状態で固定され、逆止係合片の逆止係合爪が蓋部材の外周部に軸線方向に逆止係合することにより、凹凸係合だけある場合に比して、ステータコイル組立体の抜け止め(軸線方向位置決め)が確実に行われ、充分な抜け止め強度を確保できる。更に、対をなすがた付き防止片部材が蓋部材の外周部に弾力的に当接することにより、二股状係止片、逆止係合片と合わせて合計4箇所で、ステータコイル組立体が蓋部材に係合し、がた付きがなくなる。
【0013】
このがた付きを効果的になくす上で、前記二股状係止片と前記逆止係合片は、前記ステータコイル組立体の中心軸を挟んで略対向する位置に設けられ、前記一対のがた付き防止片は、前記ステータコイル組立体の中心軸を挟んで略対向するように、前記二股状係止片および前記逆止係合片の間の位置に各々設けられていることが好ましい。
【0014】
この発明による電動弁は、詳細構成として、前記ステータコイル組立体が、本体部と、前記本体部端面部に周方向取付位置を変更可能に取り付けられる環状のブラケット板とを含み、前記二股状係止片と、前記逆止係合片と、前記一対のがた付き防止片が前記ブラケット板に折曲形成されている。
【0015】
この発明による電動弁では、ブラケット板に、二股状係止片、逆止係合片、がた付き防止片の全てが設けられ、ブラケット板の本体部端面部に対する周方向取付位置を変更することにより、ステータコイル組立体より出ているリード線の引き出し位置を中心軸線周りに変更することができ、かつ、ロータの磁極がいくつに分割されているかによって、弁体の全開や全閉時の各磁極の周方向位置が変化するのに合わせて、ステータコイル組立体の周方向位置を調整することができる。
【0016】
この発明による電動弁は、さらに、前記二股状係止片と前記突起部とが二股係合する係合部が前記蓋部材の外周より小さい径方向位置に設けられている。この構造により、二股状係止片と突起部とが二股係合する周方向位置以外では、二股状係止片が蓋部材に衝突し、ステータコイル組立体をケースに対して正規の軸線方向挿入位置まで挿入することができず、タンパプルーフがなされる。
【0017】
また、上述の目的を達成するために、この発明による電動弁は、有底円筒形状のケースと、前記ケースの開口端に固着されて当該ケースを密閉に蓋する円盤状の蓋部材とを有し、前記ケース内に、弁体、ステッピングモータのロータが配置され、前記ケースの外周に前記ステッピングモータの円筒形状のステータコイル組立体がはめ込み装着され、前記蓋部材側に弁ポートが設けられ、前記ステッピングモータによって前記弁体を駆動する電動弁において、前記蓋部材の外周部に突起部が突出形成され、前記ステータコイル組立体には前記突起部に二股係合する二股状係止片が設けられ、前記二股状係止片と前記突起部とが二股係合する係合部が前記蓋部材の外周より小さい径方向位置に設けられている。
【0018】
この発明による電動弁によれば、二股状係止片と突起部とが二股係合する周方向位置以外では、二股状係止片が蓋部材に衝突し、ステータコイル組立体をケースに対して正規の軸線方向挿入位置まで挿入することができず、タンパプルーフがなされる。
【0019】
この発明による電動弁は、詳細構成として、前記ステータコイル組立体は、本体部と、前記本体部の端面部に周方向取付位置を変更可能に取り付けられる円環状のブラケット板とを含み、前記ブラケット板に前記二股状係止片が折曲形成されている。
【0020】
この発明による電動弁では、ブラケット板に、二股状係止片が設けられ、ブラケット板の本体部端面部に対する周方向取付位置を変更することにより、ステータコイル組立体より出ているリード線の引き出し位置を中心軸線周りに変更することができる。
【0021】
この発明による電動弁は、さらに、二股状係止片は、前記突起部を受け入れる凹溝状の係合部を含み、当該係合部の入口部の横幅が、前記突起部の凹溝係合部の横幅より小さい。この構造により、二股状係止片と突起部との係合部でも、がた付き防止が行われる。
【0022】
【発明の実施の形態】
以下に添付の図を参照してこの発明の実施の形態を詳細に説明する。
図1〜図8はこの発明による電動弁の一つの実施形態を示している。
【0023】
電動弁は、深絞りによる有底円筒形状(キャン状)のケース10と、円盤板状の蓋部材11とを有している。蓋部材11は、ケース10の開口端10Aに気密に固着されてケース10を密閉に蓋し、ケース10内に、密閉構造の弁室・ロータ室12を画定している。
【0024】
蓋部材11は、ステンレス板材をプレス成形・打ち抜きしたものであり、上面部にはケース10の開口端10Aの内径にほぼ等しい外径の段差部11A(図1参照)が形成されている。段差部11Aにはケース10の開口端10Aが嵌合し、この嵌合部がろう付け、溶接等によって気密接合されている。
【0025】
蓋部材11の所要部位(3ケ所)に、貫通孔11B、11C、11D(図4参照)が打ち抜き形成されている。貫通孔11B、11C、11Dには各々管継手14、15、16の一端部が挿入され、各々リングろうによるろう付けやペーストによるろう付け等によって固定されている。
【0026】
蓋部材11の上面部にはステンレス板材製の中間板17がろう付けによって固定されている。中間板17の上面部にはステンレス薄板製の弁座シート18が取り付けられている。中間板17、弁座シート18には、貫通孔11B、11C、11Dに連通する貫通孔(弁ポート19)や切り欠き20等が設けられている。
【0027】
弁室・ロータ室12内にある弁座シート18の上面が弁座面であり、この弁座面に弁体21が配置されている。弁体21は、中心孔21Aを遊嵌合状態で貫通する中心軸22によって回転中心を設定され、中心軸22に案内されて中心軸線周りに回転し、連通する弁ポートの切り換えによって流路切換を行う。中心軸22は、下端を中間板17より回転可能に支持され、上端をケース10に係合している軸受部材24によって回転可能に支持されている。
【0028】
弁体21は係合部23によってケース10内に設けられているステッピングモータ30のロータ31とトルク伝達関係に連結される。ロータ31は、外周部を多極着磁されたプラスチックスマグネットであり、ボス部に貫通形成された中心孔31Aを遊嵌合状態で貫通する中心軸22によって弁体21と同様に回転中心を設定され、中心軸22に案内されて中心軸線周りに回転し、前述したように、係合部23によって弁体21とトルク伝達関係に連結され、弁体21を回転駆動する。
【0029】
ロータ31のボス部の下端部と弁体21の上面部との間には、圧縮コイルばねによる押さえばね25が挟まれている。押さえばね25は、弁体21の底面を弁座シート18の上面(弁座面)に押し付けて低差圧状態での弁シールの安定性を確保している。
【0030】
ケース10の外周部には、ステッピングモータ30のステータ組立体(ステータユニット)32が位置決め装着されている。ステータ組立体32は、上下の外凾33、上下2段のボビン34およびコイル巻線35、複数個の磁極歯36、電気コネクタ部37等を有し、封止樹脂38によって液密封止されている。ステッピングモータ30は、ステータ組立体32のコイル巻線35に対する通電より、ロータ31を分割回転駆動する。
【0031】
ステータ組立体32は、ケース10の外周に嵌合する円形横断面の中央開口39を有する円筒状をなしている。外凾33の下底面33Aには環状のブラケット板40が係脱可能に取り付けられている。
【0032】
ブラケット板40は、プレス成形品であり、外周形状がロータ31の着磁極数に応じた多角形状(例えば略六角形状)で、内周形状が略円形の環状基部41と、環状基部41より折曲形成された二股状係合片42、逆止係合片43、対をなすがた付き防止片44、45とを一体形成されている。
【0033】
二股状係合片42は、環状基部41より略直角に折曲されて上下反転のY字形をなし、二股奥部に凹溝状の係合部42Aを、その奥部のばね性付与用切欠部42Bを有する。
【0034】
逆止係合片43は、ステータコイル組立体32の中心軸を挟んで二股状係合片42と略対向している。逆止係合片43は、二股状係合片42等の他の片より長く、環状基部41より少し内側に傾斜しており、中間に内側に傾斜起立した逆止係合爪43Aを切り起こし形成され、先端に手操作による逆止解除用の掴み部43Bを有する。
【0035】
逆止係合片43の逆止係合爪43Aは、蓋部材11の外周縁部に軸線方向に逆止係合し(図1参照)、ステータコイル組立体32の抜け止めを行う。
【0036】
がた付き防止片44、45は、ステータコイル組立体32の中心軸を挟んで略対向するように、二股状係止片42および逆止係合片43の間の位置に各々設けられている。
【0037】
がた付き防止片44、45は、環状基部41より少し内側に傾斜するように折曲された折曲基部44A、45Aと、その先端に設けられた外側傾斜のガイド部44B、45Bとを有する。この対をなすがた付き防止片44、45は、各々、蓋部材11の外周面に弾力的に当接し、蓋部材11を径方向両側よりばね性をもってを挟み込む。
【0038】
外凾33の下底面33Aには、各々横転L字形をなす一対の抜き差しガイド部46、47と、差し込み奥部のストッパをなす横転L字形のストッパ係合部48と、差し込み手前側にあって抜け止めを行う逆止形状の抜け止め係合部49とが各々切り起こし形成されている。
【0039】
ブラケット板40は、抜け止め係合部49を乗り越えて一対の抜き差しガイド部46、47間に差し込まれ、抜き差しガイド部46、47に案内されて差し込み先端側がストッパ係合部48に係合するまで押し込まれ、差し込み手前側が抜け止め係合部49に逆止係合することにより、外凾33の下底面33Aに接合状態で固定される。
【0040】
図2に示されているように、ロータ31の着磁極数に応じた多角形状に形成されたブラケット板40の環状基部41の外周部にある6個の直線部41A〜41Fのうち、3組の平行な二つの直線部41Aと41D、42Bと41E、42Cと41Fの各々の平行離間寸法A、B、Cは互いに等しく、これらは、外凾33の抜き差しガイド部46と47の平行離間寸法Dに等しい。
【0041】
これにより、ブラケット板40を外凾33の抜き差しガイド部46、47間に差し込む平行な二つの直線部41A・41D、42B・41E、42C・41Fを選ぶことができる。
【0042】
このことにより、ブラケット板40の外凾33に対する周方向取付位置が、ロータ31の着磁極数に応じて定まる角度間隔で、変更可能になり、ロータ31の磁極がいくつに分割されているかによって、弁体21の全開や全閉時の各磁極の周方向位置が変化するのに合わせて、ステータコイル組立体32の周方向位置を調整することができ、かつ、ステータコイル組立体32より出ているリード線51の引き出し位置を中心軸線周りに変更することが可能になる。
【0043】
蓋部材11は、D字形の外周形状を有し、その直線部11Eに突起部50を打ち抜きプレス成形によって一体形成されている。突起部50は、瓢箪形をなし、根元側に二股状係合片42の係合部42Aと係合する狭隘形状部(凹溝係合部)50Aを有する。
【0044】
二股状係合片42は、突起部50の狭隘形状部50Aを両側から挟み、突起部42を跨ぐようにして突起部50に二股係合するものであり、凹溝状の係合部42Aに隘形状部50Aを受け入れ、これを両側から挟む。これにより、ステータコイル組立体32がケース10に対して所定の周方向位置に回り止め固定される。
【0045】
この回り止め固定構造により、凹凸係合に比して、ステータコイル組立体32がケース10と共に本体側をなす蓋部材11に充分な取付強度をもって周方向位置決め状態で固定される。二股状係止片42が係合する突起部50は、蓋部材11に一体形成されているから、二股状係止片42が弁ハウジングに取り付けられた管継手やスプリングピンに係合する場合に比して、ステータコイル組立体32の周方向取付位置精度を容易に高めることができる。
【0046】
つぎに、各部の最適寸法設定について説明する。
図4、図7に示されているように、蓋部材11は、D字形の外周形状をなしており、Dカット(直線部11E)の中心からの径方向寸法Fは、蓋部材11の通常円弧部11Fの半径Hより小さい(F<H)。突起部50は、Dカットにあるから、狭隘形状部50Aの中心からの径方向寸法Eも、蓋部材11の通常円弧部11Fの半径Hより小さい(E<H)。そして、二股状係合片42の中心からの寸法は狭隘形状部50Aの径方向寸法Eに等しく、誤組み付け防止のために、H≧F+t+αに設定されている。ここで、tはブラケット板40、特に二股状係合片42の板厚、αは余裕(確実性)のための寸法である。
【0047】
上述の寸法設定により、二股状係止片42と突起部50とが二股係合する係合部(狭隘形状部50A)が蓋部材11の外周(通常円弧部11F)より小さい径方向位置に設けられることになり、図8に示されているように、二股状係止片42と突起部50とが二股係合する周方向位置以外では、二股状係止片42が蓋部材11に衝突し、ステータコイル組立体32をケース10に対して正規の軸線方向挿入位置まで挿入することができない。これにより、誤組み付けを未然に防ぐ、タンパプルーフがなされる。
【0048】
図4、図5に示されているように、二股状係止片42の係合部42Aの各部寸法J、K、Lは、蓋部材11の狭隘形状部50Aの幅寸法G、板厚Tを挟み込む下記の寸法設計になっている。
J=G−α、K=T−α、L=G+α
ただし、Jは、二股状係止片42の係合部42Aの入口部の横幅寸法、Kは入口部を除く係合部42Aの深さ寸法、Tは蓋部材の板厚、Lは入口部以外の係合部42Aの横幅寸法である。
【0049】
J=G−αであることにより、係合部42Aの入口部の横幅寸法Jが突起部50の狭隘形状部50Aの横幅寸法Gより小さい。
【0050】
この構造により、差し込み係合時のクリック感が得られ、二股状係止片42と突起部50との係合部でのがた付き防止、挿入抜け止め、挿入後の固定力(上方)が得られる。そして、この係合部において、係合部42Aの奥部のばね性付与用切欠部42Bの存在により、適当なばね性が確保される。
【0051】
また、突起部50の狭隘形状部50Aに二股状係止片42を差し込み易くする目的で、ガイドとして、二股状係止片42が上下反転のY字形(テーパ形状)になっており、突起部50の狭隘形状部50Aの上面角部が、図4中に拡大して示されているように、面取り(面取れ部50B)あるいR加工され、二股状係止片42の挿入、係合を確実、容易としている。
【0052】
がた付き防止片44、45は、ステータコイル組立体32の中心軸を挟んで略対向する位置から、若干内側に傾斜するように曲げ加工してあり、これらがた付き防止片44、45の存在により、蓋部材11を確実にホルードでき、挿入、係合時の安定性が得られる。がた付き防止片44、45の下方先端部の中心からの寸法Mは、蓋部材11のDカット部を除くほぼ円形部の半径Hより大きく、しかも、外側傾斜のガイド部44B、45Bにより、がた付き防止片44、45を挿入し易い形状になっている。
【0053】
がた付き防止片44、45の折曲基部44A、45Aの中心からの寸法Nは寸法Hよりも小さく(N<H)、鉛直方向寸法(長手方向寸法)を蓋部材11の底面までの寸法Oに対して若干大きくすることによって、クリック感と本体部(蓋部材11側)を常に上方にホールドさせる作用力を発生させている。なお、上述の係合位置合せを確実とするために、がた付き防止片44、45の鉛直方向寸法は二股状係止片42よりも、短くしている。
【0054】
逆止係合片43の逆止係合爪43Aは、蓋部材11のDカット部を除くほぼ円形の外周縁を乗り越えてラチエット的(逆止)な機能となる。即ち、挿入時には、たわんでスムーズに蓋部材11の外径部を乗り越えるが、抜き取る方向には引っかかり状態となって通常の引き抜き荷重では、脱着できなくなる。この逆止係合による抜け止めは、凹凸係合だけある場合に比して、充分な抜け止め強度を得ることができる。なお、意識的に、脱着する際には、逆止解除用の掴み部43Bをつかんで先端部を外径方向にたわませ、ラチエット状態を解除することができる。
【0055】
図9、図10はこの発明による電動弁の他の実施形態を示している。なお、図9、図10において、図7、図8に対応する部分は、図7、図8に付した符号と同一の符号を付けて、その説明を省略する。
【0056】
この実施形態では、二股状係止片42が縦方向に屏風状に折曲された形状になっている。この折曲形状により二股状係止片42の剛性が高くなり、図8に示されているように、二股状係止片42と突起部50とが二股係合する周方向位置以外において、二股状係止片42が蓋部材11に衝突している時に、強く押されても、二股状係止片4が径方向外方へ変形することがなく、タンパプルーフ効果が確実に得られるようになる。
【0057】
また、他の実施形態として、図11に示されているように、ブラケット板40に、取付ボルト通し孔52を明けられた弁装置取付用の取付片(マウントブラケット)53を一体的に折曲形成することもできる。これにより、マウントブラケット等の別部品を必要とすることなく、取付片53によって電動弁を使用箇所に取り付けることができ、部品点数の削減を図ることができる。
【0058】
また、逆止係合片43の逆止係合爪43Aは、切り起こし形成以外に、図12に示されているように、ルーバ加工によってルーバ加工形状に形成することもできる。
【0059】
また、ステータコイル組立体32は、図13に示されているような樹脂ポッティング型のものにも同様に適合可能である。なお、図13において、54は樹脂ポッティング部を、55はカバーを各々示している。
【0060】
また、この発明による電動弁は、上述の構造による流路切換弁に限られることはなく、ステッピングモータ駆動の種々の型式の流量制御弁にも同様に適用できる。
【0061】
【発明の効果】
以上の説明から理解される如く、この発明による電動弁によれば、対をなすがた付き防止片部材が蓋部材の外周部に弾力的に当接することにより、二股状係止片、逆止係合片と合わせて合計4箇所で、ステータコイル組立体が蓋部材に係合し、がた付きがなくなる。
【図面の簡単な説明】
【図1】この発明による電動弁の一つの実施形態を示す縦断面図である。
【図2】この発明の一つの実施形態による電動弁のステータコイル組立体とブラケット板との取付構造を示す分解斜視図である。
【図3】この発明の一つの実施形態による電動弁の本体側とブラケット板との取付構造を示す分解斜視図である。
【図4】この発明の一つの実施形態による電動弁の蓋部材の要部を一部拡大して示す斜視図である。
【図5】この発明の一つの実施形態による電動弁の二股係合片の正面図である。
【図6】図3のX矢視図である。
【図7】図3のY矢視図である。
【図8】図3のY矢視図で、誤組み付け状態を示す図である。
【図9】この発明による電動弁の他の実施形態による図3のY矢視相当図である。
【図10】この発明による電動弁の他の実施形態による誤組み付け状態を示す図3のY矢視相当図である。
【図11】この発明の他の実施形態による電動弁のブラケット板の斜視図である。
【図12】この発明の他の実施形態による電動弁のブラケット板の逆止爪部分の斜視図である。
【図13】この発明による電動弁の他の実施形態を示す縦断面図である。
【符号の説明】
10 ケース
11 蓋部材
12 弁室・ロータ室
21 弁体
30 スッピングモータ
31 ロータ
32 ステータ組立体
40 ブラケット板
41 環状基部
42 二股状係合片
43 逆止係合片
44、45 がた付き防止片
46、47 抜き差しガイド部
48 ストッパ係合部
49 抜け止め係合部
50 突起部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a motor-operated valve, and more particularly to a motor-operated valve driven by a stepping motor.
[0002]
[Prior art]
A disc-shaped lid member (base plate) for sealingly closing the case is fixedly fixed to the open end of the bottomed cylindrical case, and a valve body and a rotor of a stepping motor are arranged in the case. 2. Description of the Related Art There is known an electric valve in which a stator coil assembly of a stepping motor is fitted and mounted, a valve port is provided on a lid member side, and a valve body is driven by the stepping motor (for example, Patent Document 1).
[0003]
In the electric valve driven by the stepping motor as described above, the cylindrical stator coil assembly is arranged in the circumferential direction (magnetic pole arrangement direction) with respect to the outer periphery of the case for phase adjustment, inversion phase adjustment, valve opening point alignment, and the like. It needs to be installed at a fixed position.
[0004]
As this circumferential positioning structure, a structure in which a protruding end portion of a positioning piece provided integrally with a stator coil assembly is engaged with a positioning recess formed on an outer wall of a valve housing (for example, Patent Document 2, 3) a bifurcated locking piece attached to a stator coil assembly that straddles and engages a pipe joint fixed to a valve housing (for example, Patent Document 3); a bifurcated locking attached to a stator coil assembly Various types are known, such as those in which a piece is driven into the outer wall of a valve housing to engage with a positioning pin (for example, Patent Documents 3 and 4).
[0005]
[Patent Document 1]
JP 2002-147900 A [Patent Document 2]
Japanese Patent Application Laid-Open No. 8-313823 [Patent Document 3]
Japanese Patent Application Laid-Open No. 2000-74245 [Patent Document 4]
JP 2001-32954 A
[Problems to be solved by the invention]
The one in which the convex portion at the tip of the positioning piece provided on the stator coil assembly is engaged with the positioning concave portion on the outer wall of the valve housing has insufficient rotation resistance and instability, and obtains sufficient mounting strength (position holding strength). Difficult to structure. Further, it is difficult to secure a sufficient strength to prevent the stator coil assembly from coming off (positioning in the axial direction) only by this concave / convex engagement.
[0007]
In the case where the forked locking piece attached to the stator coil assembly is straddled and engaged with a pipe joint fixed to the valve housing, the circumferential position of the stator coil assembly is uniquely determined by the position of the pipe joint. A structure in which the lead wire withdrawal position (connector position) of the assembly cannot be changed cannot be provided. Unless the fitting accuracy of the pipe joint is increased, the required circumferential mounting position accuracy of the stator coil assembly cannot be obtained.
[0008]
In addition, a forked locking piece attached to the stator coil assembly is merely straddled and engaged with the pipe joint, or a forked locking piece attached to the stator coil assembly is driven into the outer wall of the valve housing. If the stator coil assembly is only engaged on both sides of the positioning pin, it is difficult to eliminate the backlash in a state where the stator coil assembly is assembled on the outer periphery of the case, and the assembling accuracy is deteriorated, which causes noise.
[0009]
Also, if the stator coil assembly can be inserted into the wrong circumferential position unless it is visually observed, or if the stator coil assembly is rotated and positioned after insertion, the stator coil assembly may be fixed at the wrong position. No consideration has been given to tamper proof.
[0010]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is possible to obtain a sufficient mounting strength and to prevent the stator coil assembly from being attached to a required circumferential mounting position without rattling. It is an object of the present invention to provide a tamper-proof motor-operated valve that can be reliably fixed with high accuracy and eliminates the possibility of fixing a stator coil assembly at an incorrect position.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a motor-operated valve according to the present invention has a bottomed cylindrical case, and a disk-shaped lid member fixed to an open end of the case and sealingly closing the case, A valve body and a rotor of a stepping motor are arranged in the case, a cylindrical stator coil assembly of the stepping motor is fitted and mounted on an outer periphery of the case, and a valve port is provided on the lid member side, and the stepping is performed. In a motor-operated valve for driving the valve body by a motor, a protrusion is formed on an outer peripheral portion of the lid member, and the protrusion is engaged with the stator coil assembly so as to sandwich the protrusion from both sides. A fork-shaped locking piece, a non-return engagement piece including a non-return engagement claw that non-returnly engages the outer peripheral portion of the lid member in the axial direction, and a pair of elastically abutting outer peripheral portions of the lid member. Rattle It is provided with locking piece.
[0012]
According to the electric valve according to the present invention, the forked locking piece attached to the stator coil assembly is forkedly engaged with the projection so as to sandwich the projection formed on the outer peripheral portion of the lid member from both sides. Therefore, the stator coil assembly is fixed to the lid member forming the main body side together with the case in a circumferentially-positioned state with sufficient mounting strength as compared with the concave-convex engagement. The non-return engagement with the outer peripheral portion of the member in the axial direction ensures that the stator coil assembly can be securely prevented from being removed (axially positioned) as compared with the case where only the concave and convex engagement is provided, and that the retaining strength is sufficient. Can be secured. Further, the pair of rattle preventing piece members elastically abut against the outer peripheral portion of the lid member, so that the stator coil assembly can be assembled at a total of four locations including the forked locking piece and the non-return engaging piece. Engagement with the lid member eliminates rattling.
[0013]
In order to effectively eliminate this rattling, the forked locking piece and the check engagement piece are provided at positions substantially opposed to each other across the central axis of the stator coil assembly, and the pair of It is preferable that the anti-rattle pieces are respectively provided at positions between the forked locking pieces and the non-return engaging pieces so as to substantially oppose each other with the central axis of the stator coil assembly interposed therebetween.
[0014]
As a detailed configuration, the motor-operated valve according to the present invention includes, as a detailed configuration, the stator coil assembly including a main body, and an annular bracket plate attached to the main body end face so as to be able to change a circumferential mounting position. A stop piece, the non-return engagement piece, and the pair of rattling prevention pieces are formed by bending the bracket plate.
[0015]
In the motor-operated valve according to the present invention, the bracket plate is provided with all of the forked locking pieces, the non-return engagement pieces, and the rattling preventing pieces, and the circumferential mounting position of the bracket plate with respect to the main body end face is changed. Thus, the lead-out position of the lead wire coming out of the stator coil assembly can be changed around the central axis, and depending on how many the magnetic poles of the rotor are divided, each position when the valve body is fully opened or fully closed The circumferential position of the stator coil assembly can be adjusted as the circumferential position of the magnetic pole changes.
[0016]
In the motor-operated valve according to the present invention, an engagement portion in which the forked locking piece and the projection are forkedly engaged is provided at a radial position smaller than the outer periphery of the lid member. With this structure, the bifurcated locking piece collides with the lid member at a position other than the circumferential position where the bifurcated locking piece and the protruding portion are bifurcated, and the stator coil assembly is inserted into the case in the normal axial direction. It cannot be inserted to the position and tamper proof is performed.
[0017]
Further, in order to achieve the above-mentioned object, a motor-operated valve according to the present invention includes a bottomed cylindrical case, and a disk-shaped lid member fixed to an open end of the case and sealingly closing the case. In the case, a valve body, a rotor of a stepping motor are arranged, a cylindrical stator coil assembly of the stepping motor is fitted and mounted on an outer periphery of the case, and a valve port is provided on the lid member side, In the electric valve for driving the valve body by the stepping motor, a protrusion is formed on an outer peripheral portion of the lid member, and the stator coil assembly is provided with a fork-shaped locking piece for engaging the fork with the protrusion. An engagement portion in which the forked locking piece and the protruding portion are forkedly engaged is provided at a radial position smaller than the outer periphery of the lid member.
[0018]
According to the electric valve according to the present invention, the bifurcated locking piece collides with the lid member at a position other than the circumferential position where the bifurcated locking piece and the projection engage with the bifurcated engagement, and the stator coil assembly is moved to the case. It cannot be inserted to the normal axial insertion position, and is tamper proof.
[0019]
As a detailed configuration of the motor-operated valve according to the present invention, the stator coil assembly includes a main body, and an annular bracket plate attached to an end surface of the main body so as to be able to change a circumferential mounting position; The bifurcated locking piece is bent on a plate.
[0020]
In the motor-operated valve according to the present invention, the bracket plate is provided with the bifurcated locking piece, and by changing the circumferential mounting position of the bracket plate with respect to the end surface of the main body, the lead wire coming out of the stator coil assembly is drawn out. The position can be changed around the central axis.
[0021]
In the motor-operated valve according to the present invention, the bifurcated locking piece further includes a concave groove-shaped engaging portion for receiving the protrusion, and the lateral width of the entrance portion of the engaging portion is set to the concave groove engagement of the protrusion. Smaller than the width of the part. With this structure, rattling is also prevented at the engagement portion between the forked locking piece and the projection.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 8 show one embodiment of a motor-operated valve according to the present invention.
[0023]
The motor-operated valve has a cylindrical case (can shape) 10 with a bottom formed by deep drawing, and a disk-shaped lid member 11. The lid member 11 is hermetically fixed to the open end 10A of the case 10 to hermetically cover the case 10, and defines a valve chamber / rotor chamber 12 having a sealed structure in the case 10.
[0024]
The lid member 11 is formed by stamping and punching a stainless steel plate, and has a step portion 11A (see FIG. 1) having an outer diameter substantially equal to the inner diameter of the open end 10A of the case 10 on the upper surface. The opening end 10A of the case 10 is fitted to the step portion 11A, and the fitting portion is air-tightly joined by brazing, welding, or the like.
[0025]
Through holes 11B, 11C, and 11D (see FIG. 4) are punched and formed at required portions (three places) of the lid member 11. One ends of pipe joints 14, 15, 16 are inserted into the through holes 11B, 11C, 11D, respectively, and are fixed by brazing with a ring braze, brazing with a paste, or the like.
[0026]
An intermediate plate 17 made of a stainless steel plate is fixed to the upper surface of the lid member 11 by brazing. A valve seat 18 made of a thin stainless steel plate is attached to the upper surface of the intermediate plate 17. The intermediate plate 17 and the valve seat 18 are provided with through-holes (valve ports 19) communicating with the through-holes 11B, 11C and 11D, notches 20, and the like.
[0027]
The upper surface of the valve seat 18 in the valve chamber / rotor chamber 12 is a valve seat surface, and the valve element 21 is disposed on the valve seat surface. The center of rotation of the valve body 21 is set by a center shaft 22 that penetrates through the center hole 21A in a loosely fitted state, is guided by the center shaft 22, rotates around the center axis, and switches the communicating valve port to switch the flow path. I do. The center shaft 22 has a lower end rotatably supported by the intermediate plate 17 and an upper end rotatably supported by a bearing member 24 engaged with the case 10.
[0028]
The valve body 21 is connected to the rotor 31 of the stepping motor 30 provided in the case 10 in a torque transmitting relationship by the engaging portion 23. The rotor 31 is a plastic magnet whose outer peripheral portion is multipolar magnetized. The center of rotation of the rotor 31 is the same as that of the valve body 21 by the center shaft 22 that penetrates through a center hole 31A formed through the boss portion in a loosely fitted state. It is set, guided by the central shaft 22, rotated around the central axis, and connected to the valve body 21 in the torque transmitting relationship by the engaging portion 23 as described above, and drives the valve body 21 to rotate.
[0029]
Between the lower end of the boss of the rotor 31 and the upper surface of the valve body 21, a pressing spring 25 made of a compression coil spring is sandwiched. The presser spring 25 presses the bottom surface of the valve body 21 against the upper surface (valve seat surface) of the valve seat 18 to ensure the stability of the valve seal in a low differential pressure state.
[0030]
A stator assembly (stator unit) 32 of the stepping motor 30 is positioned and mounted on the outer periphery of the case 10. The stator assembly 32 includes upper and lower outer casings 33, upper and lower two-stage bobbins 34 and coil windings 35, a plurality of magnetic pole teeth 36, an electrical connector section 37, and the like. I have. The stepping motor 30 divides and drives the rotor 31 by energizing the coil winding 35 of the stator assembly 32.
[0031]
The stator assembly 32 has a cylindrical shape having a central opening 39 with a circular cross section that fits on the outer periphery of the case 10. An annular bracket plate 40 is detachably attached to the lower bottom surface 33A of the outer box 33.
[0032]
The bracket plate 40 is a press-formed product. The outer peripheral shape is a polygonal shape (for example, a substantially hexagonal shape) according to the number of magnetized poles of the rotor 31 and the inner peripheral shape is a substantially circular shape. A bent fork-shaped engaging piece 42, a non-return engaging piece 43, and a pair of rattle preventing pieces 44 and 45 are integrally formed.
[0033]
The bifurcated engagement piece 42 is bent at a substantially right angle from the annular base 41 to form a Y-shape that is upside down. It has a portion 42B.
[0034]
The check engagement piece 43 is substantially opposed to the forked engagement piece 42 with the center axis of the stator coil assembly 32 interposed therebetween. The check engagement piece 43 is longer than other pieces such as the bifurcated engagement piece 42 and is slightly inclined inwardly of the annular base 41, and cuts and raises the check engagement claw 43A which is inclined inward and inward in the middle. It has a grip portion 43B at its tip for manual release of the non-return.
[0035]
The non-return engagement claw 43A of the non-return engagement piece 43 is non-reversely engaged with the outer peripheral edge of the lid member 11 in the axial direction (see FIG. 1), and prevents the stator coil assembly 32 from falling off.
[0036]
The rattling preventing pieces 44 and 45 are respectively provided at positions between the forked locking piece 42 and the non-return engaging piece 43 so as to substantially oppose each other with the central axis of the stator coil assembly 32 interposed therebetween. .
[0037]
The rattling preventing pieces 44 and 45 have bent bases 44A and 45A that are bent so as to be inclined slightly inward from the annular base 41, and guide parts 44B and 45B that are provided at the ends thereof and that are inclined outward. . The pair of rattle preventing pieces 44 and 45 elastically abut against the outer peripheral surface of the lid member 11, and sandwich the lid member 11 from both sides in the radial direction with resiliency.
[0038]
On the lower bottom surface 33A of the outer box 33, a pair of insertion / removal guides 46 and 47 each forming a horizontal L-shape, a horizontal L-shaped stopper engagement portion 48 serving as a stopper at the back of the insertion, and a front side of the insertion. Each of the non-removable retaining engagement portions 49 for retaining is formed by cutting and raising.
[0039]
The bracket plate 40 is inserted between the pair of insertion / removal guides 46 and 47 over the retaining engagement portion 49 and guided by the insertion / removal guides 46 and 47 until the insertion distal end engages the stopper engagement portion 48. By being pushed in, the front side of the insertion is reversely engaged with the retaining engagement portion 49, so that the outer housing 33 is fixed to the lower bottom surface 33 </ b> A in a joined state.
[0040]
As shown in FIG. 2, three sets of six straight portions 41A to 41F on the outer peripheral portion of the annular base 41 of the bracket plate 40 formed in a polygonal shape corresponding to the number of magnetized poles of the rotor 31 are set. The parallel separation dimensions A, B, and C of the two parallel linear portions 41A and 41D, 42B and 41E, and 42C and 41F are equal to each other, and these are the parallel separation dimensions of the insertion / extraction guide portions 46 and 47 of the outer box 33. Equal to D.
[0041]
Thereby, two parallel straight portions 41A and 41D, 42B and 41E, and 42C and 41F into which the bracket plate 40 is inserted between the insertion and insertion guide portions 46 and 47 of the outer box 33 can be selected.
[0042]
Accordingly, the circumferential mounting position of the bracket plate 40 with respect to the outer housing 33 can be changed at an angular interval determined according to the number of magnetized poles of the rotor 31, and depending on how many magnetic poles of the rotor 31 are divided, The circumferential position of the stator coil assembly 32 can be adjusted in accordance with a change in the circumferential position of each magnetic pole when the valve body 21 is fully opened or fully closed. It is possible to change the lead-out position of the lead wire 51 around the central axis.
[0043]
The lid member 11 has a D-shaped outer peripheral shape, and is formed integrally with the linear portion 11E by stamping and punching the projection 50. The protruding portion 50 has a gourd shape, and has a narrowed portion (recessed groove engaging portion) 50A on the base side for engaging with the engaging portion 42A of the forked engaging piece 42.
[0044]
The bifurcated engagement piece 42 sandwiches the narrow portion 50A of the projection 50 from both sides and engages the projection 50 bifurcatedly so as to straddle the projection 42. The bottle-shaped portion 50A is received and sandwiched from both sides. As a result, the stator coil assembly 32 is prevented from rotating around the case 10 at a predetermined circumferential position.
[0045]
By this rotation preventing structure, the stator coil assembly 32 is fixed to the cover member 11 which forms the main body together with the case 10 in a circumferentially positioned state with sufficient mounting strength as compared with the uneven engagement. Since the projection 50 with which the forked locking piece 42 engages is formed integrally with the lid member 11, when the forked locking piece 42 is engaged with a pipe joint or a spring pin attached to the valve housing. In comparison, the accuracy of the circumferential mounting position of the stator coil assembly 32 can be easily increased.
[0046]
Next, the optimal dimension setting for each part will be described.
As shown in FIG. 4 and FIG. 7, the lid member 11 has a D-shaped outer peripheral shape, and the radial dimension F from the center of the D cut (the linear portion 11E) is the same as the normal size of the lid member 11. It is smaller than the radius H of the arc 11F (F <H). Since the projection 50 is in the D-cut, the radial dimension E from the center of the narrowed portion 50A is also smaller than the radius H of the normal arc portion 11F of the lid member 11 (E <H). The dimension from the center of the bifurcated engagement piece 42 is equal to the radial dimension E of the narrow shape portion 50A, and is set to H ≧ F + t + α to prevent erroneous assembly. Here, t is the plate thickness of the bracket plate 40, particularly the bifurcated engagement piece 42, and α is a dimension for margin (reliability).
[0047]
Due to the above-described dimension setting, the engaging portion (narrow-shaped portion 50A) where the forked locking piece 42 and the protruding portion 50 are forkedly engaged is provided at a radial position smaller than the outer periphery (normally the arc portion 11F) of the lid member 11. As shown in FIG. 8, the forked locking piece 42 collides with the lid member 11 at a position other than the circumferential position where the forked locking piece 42 and the protrusion 50 are engaged in the forked state. However, the stator coil assembly 32 cannot be inserted into the case 10 up to the normal axial insertion position. As a result, a tamper-proof operation is performed to prevent erroneous assembly.
[0048]
As shown in FIGS. 4 and 5, the dimensions J, K, and L of the engagement portion 42A of the forked locking piece 42 are the width G and the thickness T of the narrow shape portion 50A of the lid member 11. The following dimensional design sandwiches
J = G-α, K = T-α, L = G + α
Here, J is the width of the entrance of the engaging portion 42A of the forked locking piece 42, K is the depth of the engaging portion 42A excluding the entrance, T is the thickness of the lid member, and L is the entrance. The width dimension of the engaging portion 42A other than the above.
[0049]
Since J = G−α, the width J of the entrance portion of the engagement portion 42A is smaller than the width G of the narrow shape portion 50A of the projection 50.
[0050]
With this structure, a click feeling at the time of insertion engagement is obtained, rattling prevention at the engagement portion between the forked locking piece 42 and the projection 50, insertion / removal prevention, and fixing force (upper) after insertion are achieved. can get. In this engagement portion, a suitable spring property is ensured by the presence of the springiness imparting notch 42B at the back of the engagement portion 42A.
[0051]
Further, in order to make it easy to insert the forked locking piece 42 into the narrow shape portion 50A of the protruding portion 50, the forked locking piece 42 has a vertically inverted Y-shape (tapered shape) as a guide. As shown in the enlarged view of FIG. 4, the upper surface corner of the 50 narrow shape portion 50A is chamfered (chamfered portion 50B) or R-processed, and insertion and engagement of the forked locking piece 42 are performed. Is sure and easy.
[0052]
The rattling preventing pieces 44 and 45 are bent so as to be slightly inwardly inclined from a position substantially opposed to the center axis of the stator coil assembly 32. Due to the presence, the lid member 11 can be reliably held, and the stability at the time of insertion and engagement can be obtained. The dimension M from the center of the lower end portions of the rattling preventing pieces 44, 45 is larger than the radius H of the substantially circular portion excluding the D cut portion of the lid member 11, and furthermore, due to the outwardly inclined guide portions 44B, 45B, The shape is such that the backlash prevention pieces 44 and 45 can be easily inserted.
[0053]
The dimension N from the center of the bending bases 44A, 45A of the rattle preventing pieces 44, 45 is smaller than the dimension H (N <H), and the vertical dimension (longitudinal dimension) is the dimension from the bottom to the bottom surface of the lid member 11. By making it slightly larger than O, a click feeling and an action force for always holding the main body (the lid member 11 side) upward are generated. Note that, in order to ensure the above-described engagement alignment, the vertical dimension of the rattling preventing pieces 44 and 45 is shorter than that of the forked locking piece 42.
[0054]
The non-return engagement claw 43A of the non-return engagement piece 43 has a ratchet-like (non-return) function over the substantially circular outer peripheral edge of the lid member 11 except for the D-cut portion. That is, at the time of insertion, the cover member 11 smoothly bends over the outer diameter portion of the cover member 11 but is caught in the removal direction and cannot be detached with a normal removal load. The retaining by the reverse engagement can provide a sufficient retaining strength as compared with the case where only the concave and convex engagement is provided. In addition, when consciously attaching and detaching, the ratchet state can be released by grasping the grip portion 43B for releasing the non-return and bending the distal end portion in the outer radial direction.
[0055]
9 and 10 show another embodiment of the motor-operated valve according to the present invention. 9 and 10, parts corresponding to those in FIGS. 7 and 8 are denoted by the same reference numerals as those in FIGS. 7 and 8, and description thereof is omitted.
[0056]
In this embodiment, the bifurcated locking piece 42 has a shape that is folded in the vertical direction like a folding screen. Due to the bent shape, the rigidity of the forked locking piece 42 is increased, and as shown in FIG. Even if the fork-shaped locking piece 42 collides with the lid member 11 and is strongly pushed, the forked locking piece 4 is not deformed radially outward, so that the tamper-proof effect can be reliably obtained. Become.
[0057]
As another embodiment, as shown in FIG. 11, a mounting plate (mount bracket) 53 for mounting a valve device having a mounting bolt through hole 52 formed in a bracket plate 40 is integrally bent. It can also be formed. Thus, the motor-operated valve can be attached to the place of use by the attachment piece 53 without requiring a separate component such as a mount bracket, and the number of components can be reduced.
[0058]
In addition to the cut-and-raised formation, the check engagement claw 43A of the check engagement piece 43 can be formed into a louvered shape by louvering as shown in FIG.
[0059]
Further, the stator coil assembly 32 is similarly applicable to a resin potting type as shown in FIG. In FIG. 13, reference numeral 54 denotes a resin potting portion, and 55 denotes a cover.
[0060]
Further, the motor-operated valve according to the present invention is not limited to the flow path switching valve having the above-described structure, and can be similarly applied to various types of flow control valves driven by a stepping motor.
[0061]
【The invention's effect】
As can be understood from the above description, according to the motor-operated valve according to the present invention, the pair of rattle-preventing pieces elastically abut against the outer peripheral portion of the lid member, so that the bifurcated locking piece and the check At a total of four locations including the engagement pieces, the stator coil assembly is engaged with the lid member, and rattling is eliminated.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing one embodiment of a motor-operated valve according to the present invention.
FIG. 2 is an exploded perspective view showing an attachment structure between a stator coil assembly and a bracket plate of the motor-operated valve according to one embodiment of the present invention.
FIG. 3 is an exploded perspective view showing an attachment structure between the main body side of the motor-operated valve and the bracket plate according to one embodiment of the present invention.
FIG. 4 is a partially enlarged perspective view showing a main part of a lid member of the motor-operated valve according to one embodiment of the present invention.
FIG. 5 is a front view of a bifurcated engagement piece of the motor-operated valve according to one embodiment of the present invention.
FIG. 6 is a view as viewed in the direction of the arrow X in FIG. 3;
FIG. 7 is a view as viewed in the direction of the arrow Y in FIG. 3;
8 is a view as viewed in the direction of the arrow Y in FIG.
FIG. 9 is a view corresponding to the arrow Y of FIG. 3 according to another embodiment of the motor-operated valve according to the present invention.
FIG. 10 is a view corresponding to the arrow Y in FIG. 3 showing a misassembly state according to another embodiment of the motor-operated valve according to the present invention.
FIG. 11 is a perspective view of a bracket plate of a motor-operated valve according to another embodiment of the present invention.
FIG. 12 is a perspective view of a check pawl portion of a bracket plate of a motor-operated valve according to another embodiment of the present invention.
FIG. 13 is a longitudinal sectional view showing another embodiment of the motor-operated valve according to the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 10 case 11 lid member 12 valve chamber / rotor chamber 21 valve element 30 spping motor 31 rotor 32 stator assembly 40 bracket plate 41 annular base 42 forked engaging piece 43 non-return engaging piece 44, 45 rattling preventing piece 46, 47 Removal / insertion guide part 48 Stopper engagement part 49 Retaining engagement part 50 Projection part

Claims (7)

有底円筒形状のケースと、前記ケースの開口端に固着されて当該ケースを密閉に蓋する円盤状の蓋部材とを有し、前記ケース内に、弁体、ステッピングモータのロータが配置され、前記ケースの外周に前記ステッピングモータの円筒形状のステータコイル組立体がはめ込み装着され、前記蓋部材側に弁ポートが設けられ、前記ステッピングモータによって前記弁体を駆動する電動弁において、
前記蓋部材の外周部に突起部が突出形成され、
前記ステータコイル組立体に、前記突起部を両側から挟むように前記突起部に二股係合する二股状係止片と、前記蓋部材の外周部に軸線方向に逆止係合する逆止係合爪を含む逆止係合片と、前記蓋部材の外周部に弾力的に当接する一対のがた付き防止片とが設けられている、
ことを特徴とする電動弁。
It has a bottomed cylindrical case, a disk-shaped lid member fixed to the open end of the case and sealingly closing the case, and in the case, a valve element and a rotor of a stepping motor are arranged, A cylindrical stator coil assembly of the stepping motor is fitted and mounted on the outer periphery of the case, a valve port is provided on the lid member side, and the electric valve drives the valve body by the stepping motor.
A projection is formed on the outer periphery of the lid member,
A fork-shaped locking piece forcibly engaging the projection with the stator coil assembly so as to sandwich the projection from both sides; and a non-return engagement for axially non-return engagement with the outer peripheral portion of the lid member A non-return engagement piece including a claw, and a pair of rattling prevention pieces that are elastically in contact with an outer peripheral portion of the lid member are provided.
An electric valve characterized by the above-mentioned.
前記二股状係止片と前記逆止係合片は、前記ステータコイル組立体の中心軸を挟んで略対向する位置に設けられ、前記一対のがた付き防止片は、前記ステータコイル組立体の中心軸を挟んで略対向するように、前記二股状係止片および前記逆止係合片の間の位置に各々設けられていることを特徴とする請求項1記載の電動弁。The bifurcated locking piece and the non-return engagement piece are provided at positions substantially opposing each other across the central axis of the stator coil assembly, and the pair of rattle preventing pieces are provided on the stator coil assembly. The motor-operated valve according to claim 1, wherein the motor-operated valve is provided at a position between the bifurcated locking piece and the check engagement piece so as to substantially oppose each other with a central axis interposed therebetween. 前記ステータコイル組立体は、本体部と、前記本体部端面部に周方向取付位置を変更可能に取り付けられる環状のブラケット板とを含み、前記二股状係止片と、前記逆止係合片と、前記一対のがた付き防止片が前記ブラケット板に折曲形成されていることを特徴とする請求項1または2記載の電動弁。The stator coil assembly includes a main body, and an annular bracket plate attached to an end surface of the main body such that a circumferential mounting position can be changed, and the bifurcated locking piece, the check engagement piece, The motor-operated valve according to claim 1, wherein the pair of rattling preventing pieces are formed by bending the bracket plate. 前記二股状係止片と前記突起部とが二股係合する係合部が前記蓋部材の外周より小さい径方向位置に設けられていることを特徴とする請求項1〜3の何れか1項記載の電動弁。The engaging portion in which the bifurcated locking piece and the protruding portion are bifurcatedly engaged is provided at a radial position smaller than the outer periphery of the lid member. Motorized valve as described. 有底円筒形状のケースと、前記ケースの開口端に固着されて当該ケースを密閉に蓋する円盤状の蓋部材とを有し、前記ケース内に、弁体、ステッピングモータのロータが配置され、前記ケースの外周に前記ステッピングモータの円筒形状のステータコイル組立体がはめ込み装着され、前記蓋部材側に弁ポートが設けられ、前記ステッピングモータによって前記弁体を駆動する電動弁において、
前記蓋部材の外周部に突起部が突出形成され、前記ステータコイル組立体には前記突起部に二股係合する二股状係止片が設けられ、
前記二股状係止片と前記突起部とが二股係合する係合部が前記蓋部材の外周より小さい径方向位置に設けられている、
ことを特徴とする電動弁。
It has a bottomed cylindrical case, a disk-shaped lid member fixed to the open end of the case and sealingly closing the case, and in the case, a valve element and a rotor of a stepping motor are arranged, A cylindrical stator coil assembly of the stepping motor is fitted and mounted on the outer periphery of the case, a valve port is provided on the lid member side, and the electric valve drives the valve body by the stepping motor.
A protrusion is formed on an outer peripheral portion of the lid member, and the stator coil assembly is provided with a forked locking piece that is forkedly engaged with the protrusion.
An engagement portion in which the forked locking piece and the protruding portion are forkedly engaged is provided at a radial position smaller than the outer periphery of the lid member.
An electric valve characterized by the above-mentioned.
前記ステータコイル組立体は、本体部と、前記本体部の端面部に周方向取付位置を変更可能に取り付けられる円環状のブラケット板とを含み、前記ブラケット板に前記二股状係止片が折曲形成されていることを特徴とする請求項5記載の電動弁。The stator coil assembly includes a main body, and an annular bracket plate attached to an end surface of the main body such that a circumferential mounting position can be changed. The bifurcated locking piece is bent on the bracket plate. The motor-operated valve according to claim 5, wherein the motor-operated valve is formed. 前記二股状係止片は、前記突起部を受け入れる凹溝状の係合部を含み、当該係合部の入口部の横幅が、前記突起部の凹溝係合部の横幅より小さいことを特徴とする請求項1〜6の何れか1項記載の電動弁。The bifurcated locking piece includes a concave groove-shaped engaging portion for receiving the protrusion, and a lateral width of an entrance portion of the engaging portion is smaller than a lateral width of the concave groove engaging portion of the protrusion. The motor-operated valve according to any one of claims 1 to 6, wherein
JP2003129037A 2003-05-07 2003-05-07 Motorized valve Expired - Fee Related JP4246541B2 (en)

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JP2013245728A (en) * 2012-05-24 2013-12-09 Fuji Koki Corp Motor-operated valve
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CN109944975A (en) * 2017-12-20 2019-06-28 株式会社鹭宫制作所 Motor-driven valve stator and motor-driven valve
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JP2021132527A (en) * 2018-02-16 2021-09-09 株式会社不二工機 Stator unit and motor-operated valve with the same
JP7286186B2 (en) 2018-02-16 2023-06-05 株式会社不二工機 Stator unit and electric valve provided with it

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