JP4036433B2

JP4036433B2 - Valve device

Info

Publication number: JP4036433B2
Application number: JP2002032510A
Authority: JP
Inventors: 裕茂秋山
Original assignee: Keihin Corp
Current assignee: Keihin Corp
Priority date: 2002-02-08
Filing date: 2002-02-08
Publication date: 2008-01-23
Anticipated expiration: 2022-02-08
Also published as: JP2003232459A

Description

【０００１】
【発明の属する技術分野】
本発明は、弁装置に関し、特に開弁方向にばね付勢された開閉弁の弁体をソレノイドで閉弁方向に駆動するようにした弁装置の改良に関する。
【０００２】
【従来の技術】
従来、かかる弁装置は、たとえば特開２００１−２４８４３３号公報で開示されており、このものでは、エンジンの排気系に供給される二次空気の流量を制御するために上記弁装置が用いられている。
【０００３】
【発明が解決しようとする課題】
ところが上記公報で開示された弁装置では、開閉弁の弁ハウジングが、下流側接続管が取付けられる弁ケースに、上流側接続管が取付けられるカバーが結合されて成るものであり、部品点数および組付工数が比較的多くなり、コスト低減が困難となっている。
【０００４】
本発明は、かかる事情に鑑みてなされたものであり、部品点数および組付け工数の低減を図り、低コスト化を可能とした弁装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の発明は、上流側接続管および下流側接続管が連設される弁ハウジングと、前記上流側接続管に通じて弁ハウジング内に形成される弁室に臨むとともに前記下流側接続管に通じる弁孔を中央部に開口させて弁ハウジング内に固定配置される弁座と、該弁座に着座して弁孔を閉鎖することを可能として前記弁室に収納されるとともに前記弁孔を開放する側にばね付勢される弁体と、前記弁孔を軸方向移動可能に貫通して前記弁体に連設される弁軸とを有する開閉弁と；前記弁軸に同軸に連設される可動コアと、該可動コアに同軸上で対向する固定コアと、可動コアおよび固定コアを囲繞するボビンにコイルが巻装されて成るコイル組立体と、前記コイル組立体を覆う有底円筒状に形成されて前記固定コアに磁気的に結合されるととも前記弁ハウジングに結合される磁性金属製のソレノイドハウジングと、該ソレノイドハウジングの閉塞端との間に前記コイル組立体を挟んで該ソレノイドハウジングに磁気的に結合される磁性金属製のエンドプレートとを有するソレノイドと；で構成される弁装置において、前記弁ハウジングは、有底筒状のハウジング主部と、そのハウジング主部の側面から側方に延びる前記上流側接続管および下流側接続管とを有して一体に型成形されて成ると共に、前記ハウジング主部および前記ソレノイドハウジングの開口端がかしめ結合され、前記上流側接続管および下流側接続管の前記ハウジング主部への連設部間でハウジング主部に嵌合されるとともに外周にはハウジング主部の内面に弾発接触する環状の第１シール部材が装着される円盤状の第１仕切り壁と、前記下流側接続管のハウジング主部への連設部を第１仕切り壁との間に挟む位置でハウジング主部に嵌合されるとともに外周にはハウジング主部の内面に弾発接触する環状の第２シール部材が装着される円盤状の第２仕切り壁とが周方向複数箇所で連結されて成る弁座形成部が、前記ハウジング主部に挿入、固定され、ハウジング主部の閉塞端との間に前記弁室を形成する第１仕切り壁に、その中央部を貫通する弁孔と、その弁孔の前記弁室側の開口端を囲む環状の弁座とが設けられることを特徴とする。
【０００６】
このような請求項１記載の発明の構成によれば、弁ハウジングは、ハウジング主部、上流側接続管および下流側接続管を有して一体に型成形されて成るものであるので、弁ハウジングを１部材で構成するようにして部品点数の低減を図るとともに弁ハウジングを組付ける手間を省いて組付工数を減少し、コスト低減に寄与することができる。また弁ハウジングおよびソレノイドハウジングをかしめ結合するので、ソレノイドハウジングに対する弁ハウジングの周方向相対位置を自由に選ぶことができ、上流側接続管および下流側接続管の設定位置の自由度を向上することができる。しかも上流側接続管および下流側接続管を別部材に取付けるようにしたときには、取付け代が必要となるので弁ハウジングの軸方向長さが比較的大きくなるとともに、取付け部のリーク対策が必要となるのであるが、ハウジング主部に上流側接続管および下流側接続管が一体に連なるものであるので、取付け代を不要として弁ハウジングを軸方向に小型化することができるとともにリーク対策が不要となる。また、第１および第２シール部材を予め装着して小組みした弁座形成部を弁ハウジング内に挿入、固定することで、上流側接続管に連なる弁室と、下流側接続管に連なる空気室とを両室相互のシール性および空気室の外部とのシール性を維持しつつ弁ハウジング内に形成することができ、組付け性を良好とすることができる。
【０００７】
また請求項２記載の発明は、上記請求項１記載の発明の構成に加えて、前記弁ハウジングの開口端部外周にソレノイドとは反対側に臨む環状の段部が設けられ、前記ソレノイドハウジングの開口端部には、弁ハウジング側に向かうにつれて大径となるようにして内方側に凸に彎曲した彎曲部と、前記ハウジング主部の開口端部および前記エンドプレートの外周部を嵌合するようにして前記彎曲部の大径端に連なる嵌合筒部とが設けられ、前記彎曲部とは反対側の嵌合筒部の端部が、前記彎曲部の大径端との間にハウジング主部の開口端部およびエンドプレートを挟むようにしてハウジング主部の前記段部にかしめ係合されることを特徴とする。
【０００８】
このような請求項２記載の発明の構成によれば、切削加工等の面倒な加工を不要としつつ、エンドプレートおよびハウジング主部を係合せしめる段差部分をソレノイドハウジングに容易に形成するようにして、低コスト化を図ることができる。
【０００９】
請求項３記載の発明は、上記請求項１または２記載の発明の構成に加えて、前記ハウジング主部は、第１仕切り壁を嵌合せしめる第１孔部と、第１孔部よりも大径に形成されて第２仕切り壁を嵌合せしめる第２孔部とを有して開口端側に向かうにつれて段階的に大径となるように形成されることを特徴とし、かかる構成によれば、弁座形成部の弁ハウジングへの挿入時に、第１シール部材が弁ハウジングの内面に接触摺動する範囲を極力小さくし、弁座形成部の弁ハウジングへの挿入に必要な力を小さくして組付け性を向上するとともに第１シール部材に損傷が生じることを極力回避することができる。
【００１０】
請求項４記載の発明は、上記請求項１〜３の何れかに記載の発明の構成に加えて、前記コイルを覆ってコイル組立体にモールド結合される合成樹脂製のコイル封止部がソレノイドハウジングに嵌合されることを特徴とし、かかる構成によれば、コイルに連なる導線の振動による断線やショートが生じることを極力防止することができる。
【００１１】
請求項５記載の発明は、上記請求項１〜３の何れかに記載の発明の構成に加えて、前記コイルを覆うようにしてコイル組立体にモールド結合されてソレノイドハウジングに嵌合されるとともに該ソレノイドハウジングの内周に弾発的に接触する環状の第３シール部材が外周に装着されるコイル封止部と、第１および第２シール部材が外周に装着される前記弁座形成部とが一体に形成されて成る合成樹脂製のモールド封止体に、前記エンドプレートが、該エンドプレートの外周部を露出させて埋設されることを特徴とする。
【００１２】
このような請求項５の発明の構成によれば、コイル組立体およびエンドプレートが結合されるモールド封止体を弁ハウジングに組付けるようにして組付け性を高めることを可能としつつ、モールド封止体の内部および外部間のシールを確実にすることができる。
【００１３】
請求項６記載の発明は、上記請求項４または５記載の発明の構成に加えて、前記コイル封止部には、前記コイルに連なる端子を臨ませたカプラが一体に設けられ、該カプラを外方に突出させる開口部が前記ソレノイドハウジングに設けられることを特徴とし、かかる構成によれば、カプラをソレノイドハウジングの所定位置に位置決め配置することができるとともに、ソレノイドハウジング内でのコイル封止部の周方向変位を防止することができる。
【００１４】
請求項７記載の発明は、上記請求項５記載の発明の構成に加えて、前記ソレノイドハウジングは、第３シール部材を弾発的に接触させる内径を有する閉塞端側の小径孔部と、小径孔部よりも大径に形成されるとともに前記コイル封止部の外周との間に環状間隙を形成する大径孔部を有して開口端側に向かうにつれて段階的に大径となるように形成されることを特徴とし、かかる構成によれば、モールド封止体のコイル封止部にソレノイドハウジングを被せる際に、第３シール部材がソレノイドハウジングの内面に接触摺動する範囲を極力小さくし、コイル封止部にソレノイドハウジングを被せる際に必要な力を小さくして組付け性を向上するとともに第３シール部材に損傷が生じることを極力回避することができる。
【００１５】
さらに請求項８記載の発明は、上記請求項５記載の発明の構成に加えて、前記エンドプレートは、前記ボビンの開閉弁側端面に当接する円盤部と、該円盤部の外周に一端を連ならせて前記ボビンの一部を囲繞する円筒部と、該円筒部の他端から半径方向外方に張り出すとともに外周部が前記モールド封止体から突出する鍔部とを一体に備え、第２シール部材が、側面視では前記円盤部と少なくとも一部が重なる位置で弁座形成部の外周に装着されることを特徴とする。
【００１６】
このような請求項８記載の発明の構成によれば、第２シール部材およびエンドプレート間の距離を協力小さく設定して、弁装置の軸方向長さを極力短縮することができる。
【００１７】
【発明の実施の形態】
以下、本発明の実施形態を、添付図面に示す本発明の一実施例に基づいて説明する。
【００１８】
図１において、この弁装置は、たとえばエンジンの排気系に供給される二次空気の流量を制御するためのものであり、開閉弁５と、該開閉弁５を開閉駆動するソレノイド６とで構成される。
【００１９】
開閉弁５は、上流側接続管９および下流側接続管１０を一体に備える弁ハウジング７と、上流側接続管９に通じて弁ハウジング７内に形成される弁室１１に臨むとともに下流側接続管１０に通じる弁孔１２を中央部に開口させて弁ハウジング７内に固定配置される弁座１３と、該弁座１３に着座して弁孔１２を閉鎖することを可能として弁室１１に収納されるとともに前記弁孔１２を開放する側にばね付勢される弁体１４と、弁孔１２を軸方向移動可能に貫通して弁体１４に連設される弁軸１５とを有する。
【００２０】
弁ハウジング７は、有底筒状のハウジング主部８と、そのハウジング主部８の側面から側方に延びる前記上流側接続管９および下流側接続管１０とを有して一体に型成形されて成り、上流側接続管９はハウジング主部８の閉塞端寄り側面に一体に連設され、下流側接続管１０はハウジング主部８の軸方向中間部側面に一体に連設される。
【００２１】
ハウジング主部８には、合成樹脂から成る弁座形成部１７が挿入、固定されるものであり、この弁座形成部１７は、上流側接続管９および下流側接続管１０のハウジング主部８への連設部間でハウジング主部８に嵌合されるとともに外周にはハウジング主部８の内面に弾発接触する環状の第１シール部材１９が装着される円盤状の第１仕切り壁１７ａと、前記下流側接続管１０のハウジング主部８への連設部を第１仕切り壁１７ａとの間に挟む位置でハウジング主部８に嵌合されるとともに外周にはハウジング主部８の内面に弾発接触する環状の第２シール部材２０が装着される円盤状の第２仕切り壁１７ｂとが、相互間での流体の流通を許容するようにして周方向複数箇所に配置される複数の連結壁１７ｃを介して連結されて成るものである。
【００２２】
第１仕切り壁１７ａは、ハウジング主部８の閉塞端との間に弁室１１を形成するものであり、この第１仕切り壁１７ａに、その中央部を貫通する弁孔１２と、その弁孔１２の弁室１１側の開口端を囲む環状の弁座１３とが設けられる。
【００２３】
第１および第２仕切り壁１７ａ，１７ｂ間には、弁孔１２に常時通じる流体室２１が形成され、この流体室２１は下流側接続管１０に連なる。
【００２４】
一方、ハウジング主部８は、第１仕切り壁１７ａを嵌合せしめる第１孔部８ａと、第１孔部８ａよりも大径に形成されて第２仕切り壁１７ｂを嵌合せしめる第２孔部８ｂとを有して開口端側に向かうにつれて段階的に大径となるように形成される。しかも第１および第２孔部８ａ，８ｂ間には第１テーパ部８ｃが形成され、また第２孔部８ｂの開口端には第２テーパ部８ｄが形成されており、これらのテーパ部８ｃ，８ｄにより弁座形成部１７のハウジング主部８内への挿入操作が容易となる。
【００２５】
第２仕切り壁１７ｂの中央部には第１仕切り壁１７ａ側に延びる円筒状のガイド筒２３が一体に設けられており、該ガイド筒２３は前記弁軸１５をその軸方向移動を可能とするようにして囲繞する。
【００２６】
弁体１４は合成樹脂により円盤状に形成されるものであり、剛性材料から成るリング部材２４が弁体１４に埋封される。一方、弁軸１５の先端部は弁孔１２を同軸に貫通して弁室１１内に突入するものであり、弁室１１内で弁軸１５の先端部は弁体１４の中央部を貫通する。しかも弁体１４の両側で弁軸１５には、一対の金属製のシール受け部材２５，２６が、それらが内周に備える係合爪部２５ａ，２６ａを弁軸１５の外周に食い込ませるようにして固定され、両シール受け部材２５，２６および弁体１４間に環状のシール部材２７，２８がそれぞれ介装される。
【００２７】
一方のシール受け部材２５および第２仕切り壁１７ｂ間には、弁軸１５およびガイド筒２３を囲繞するコイル状の戻しばね２９が縮設され、この戻しばね２９のばね力により、弁体１４および弁軸１５は、弁体１４が弁座１３から離座して弁孔１２を開放する側に付勢されることになる。
【００２８】
ソレノイド６は、前記開閉弁５の弁軸１５に同軸に連設される可動コア３２と、該可動コア３２に同軸上で対向する固定コア３３と、可動コア３２および固定コア３３を囲繞するボビン３４にコイル３５が巻装されて成るコイル組立体３６と、前記コイル組立体３６を覆う有底円筒状に形成されて前記固定コア３３に磁気的に結合されるととも前記弁ハウジング７に結合される磁性金属製のソレノイドハウジング３７と、該ソレノイドハウジング３７の閉塞端との間に前記コイル組立体３６を挟んで該ソレノイドハウジング３７に磁気的に結合される磁性金属製のエンドプレート３８とを有する。
【００２９】
ボビン３４には、可動コア３２を摺動可能に嵌合せしめて円筒状に形成される非磁性材料製のガイドカラー３９が挿入、固定され、固定コア３３も可動コア３２に対応するようにしてガイドカラー３９内に挿入される。しかも固定コア３３は有底円筒状であるソレノイドハウジング３７の閉塞端中央部にかしめ結合される。
【００３０】
またコイル３５を覆う合成樹脂製のコイル封止部１８がコイル組立体３６にモールド結合されており、ソレノイドハウジング３７の内周に弾発的に接触する環状の第３シール部材４０が外周に装着されるコイル封止部１８がソレノイドハウジング３７に嵌合される。
【００３１】
しかもコイル封止部１８と、前記開閉弁５の弁座形成部１７とは、モールド封止体１６として一体に形成されるものであり、エンドプレート３８は、該エンドプレート３８の外周部を露出させてモールド封止体１６に埋設される。
【００３２】
モールド封止体１６には、固定コア３３から離反する側の可動コア３２の移動端を規制すべく可動コア３２に当接し得る規制面４１が設けられる。
【００３３】
ソレノイドハウジング３７は、第３シール部材４０を弾発的に接触させる内径を有する閉塞端側の小径孔部３７ａと、小径孔部３７ａよりも大径に形成されるとともに前記コイル封止部１８の外周との間に環状間隙４２を形成する大径孔部３７ｂとを有して開口端側に向かうにつれて段階的に大径となるようにして、開閉弁５側を開放した有底円筒状に形成されるものであり、該ソレノイドハウジング３７の開口端部には、弁ハウジング７側に向かうにつれて大径となるようにして内方側に凸に彎曲した彎曲部３７ｃと、前記ハウジング主部８の開口端部および前記エンドプレート３８の外周部を嵌合するようにして前記彎曲部３７ｃの大径端に連なる嵌合筒部３７ｄとが設けられる。
【００３４】
一方、弁ハウジング７の開口端部外周にはソレノイド６とは反対側に臨む環状の段部４３が設けられ、前記彎曲部３７ｃとは反対側の嵌合筒部３７ｄの端部が、前記彎曲部３７ｃの大径端との間にハウジング主部８の開口端部およびエンドプレート３８を挟むようにしてハウジング主部８の前記段部４３にかしめ係合されることにより、ソレノイドハウジング３７および弁ハウジング７が相互に結合される。
【００３５】
コイル封止部１８には、コイル３５に連なる端子４４…を臨ませたカプラ４５が一体に設けられ、該カプラ４５を外方に突出させる開口部４６がソレノイドハウジング３７の開口端側に設けられる。
【００３６】
またエンドプレート３８は、ボビン３４の開閉弁５側端面に当接する円盤部３８ａと、該円盤部３８ａの外周に一端を連ならせて前記ボビン３４の一部を囲繞する円筒部３８ｂと、該円筒部３８ｂの他端から半径方向外方に張り出すとともに外周部が前記モールド封止体１６から突出する鍔部３８ｃとを一体に備え、第２シール部材２０が、側面視では前記円盤部３８ａと少なくとも一部が重なる位置で弁座形成部１７の外周に装着される。
【００３７】
次にこの実施例の作用について説明すると、開閉弁５の弁ハウジング７は、ハウジング主部８、上流側接続管９および下流側接続管１０を有して一体に型成形されて成るものであるので、弁ハウジング７を１部材で構成するようにして部品点数の低減を図るとともに弁ハウジング７を組付ける手間を省いて組付工数を減少し、コスト低減に寄与することができる。しかも上流側接続管９および下流側接続管１０を別部材に取付けるようにしたときには、取付け代が必要となるので弁ハウジング７の軸方向長さが比較的大きくなるとともに、取付け部のリーク対策が必要となるのであるが、ハウジング主部８に上流側接続管９および下流側接続管１０が一体に連なるものであるので、取付け代を不要として弁ハウジング７を軸方向に小型化することができるとともにリーク対策が不要となる。
【００３８】
また弁ハウジング７との間に弁室１１を形成して弁ハウジング７に嵌合されるとともに弁孔１２ならびに該弁孔１２の前記弁室１１側の開口端を囲む環状の弁座１３が設けられる第１仕切り壁１７ａと、前記弁孔１２に常時通じる流体室２１を第１仕切り壁１７ａとの間に形成して弁ハウジング７に嵌合される第２仕切り壁１７ｂとを一体に有する弁座形成部１７に、ソレノイド６側のコイル３５を覆ってコイル組立体３６にモールド結合されるとともにソレノイドハウジング３７に気密に嵌合されるコイル封止部１８が一体に連設されて成る合成樹脂製のモールド封止体１６に、エンドプレート３８が、該エンドプレート３８の外周部を露出させて埋設されている。
【００３９】
したがって弁座１３を形成する部材を別に設けることを不要として部品点数を低減しつつ、コイル組立体３６、エンドプレート３８および弁座１３を一体的に小組みすることを可能として組付工数を減少し、コスト低減に寄与することができ、モールド封止体１６の内部および外部間のシールを確実にすることができる。またコイル３５を覆ってコイル組立体３６にモールド結合されるコイル封止部１８がソレノイドハウジング３７に嵌合されるので、コイル３５に連なる導線の振動による断線やショートが生じることを極力防止することができる。
【００４０】
しかも弁ハウジング７およびソレノイドハウジング３７をかしめ結合するので、ソレノイドハウジング３７に対する弁ハウジング７の周方向相対位置を自由に選ぶことができ、上流側接続管９および下流側接続管１０の設定位置の自由度を向上することができる。
【００４１】
また弁ハウジング７の開口端部外周にソレノイド６とは反対側に臨む環状の段部４３が設けられ、ソレノイドハウジング３７の開口端部には、弁ハウジング７側に向かうにつれて大径となるようにして内方側に凸に彎曲した彎曲部３７ｃと、前記ハウジング主部８の開口端部および前記エンドプレート３８の外周部を嵌合するようにして前記彎曲部３７ｃの大径端に連なる嵌合筒部３７ｄとが設けられ、前記彎曲部３７ｃとは反対側の嵌合筒部３７ｄの端部が、前記彎曲部３７ｃの大径端との間にハウジング主部８の開口端部およびエンドプレート３８を挟むようにしてハウジング主部８の前記段部４３にかしめ係合される。
【００４２】
したがって切削加工等の面倒な加工をソレノイドハウジング３７に施すことを不要としつつ、エンドプレート３８およびハウジング主部８を係合せしめる段差部分をソレノイドハウジング３７に容易に形成するようにして、低コスト化を図ることができる。
【００４３】
また弁座形成部１７が備える第１仕切り壁１７ａの外周には、ハウジング主部８の内面に弾発接触する環状の第１シール部材１９が装着され、第２仕切り壁１７ｂの外周にはハウジング主部８の内面に弾発接触する環状の第２シール部材２０が装着されており、第１および第２シール部材１９，２０を予め装着して小組みした弁座形成部１７を弁ハウジング７内に挿入、固定することで、上流側接続管９に連なる弁室１１と、下流側接続管１０に連なる流体室２１とを相互のシール性および流体室２１の外部とのシール性を維持しつつ弁ハウジング７内に形成することができ、組付け性を良好とすることができる。さらにコイル封止部１８は、その外周に装着された環状の第３シール部材４０を介してソレノイドハウジング３７に嵌合されるものであり、ソレノイド６の軸方向長さを極力短縮しつつモールド封止体１６の内部を外部との間でシールすることができる。
【００４４】
しかもハウジング主部８は、第１仕切り壁１７ａを嵌合せしめる第１孔部８ａと、第１孔部８ａよりも大径に形成されて第２仕切り壁１７ｂを嵌合せしめる第２孔部８ｂとを有して開口端側に向かうにつれて段階的に大径となるように形成されるので、弁座形成部１７の弁ハウジング７への挿入時に、第１シール部材１９が弁ハウジング７の内面に接触摺動する範囲を極力小さくし、弁座形成部１７の弁ハウジング７への挿入に必要な力を小さくして組付け性を向上するとともに第１シール部材１９に損傷が生じることを極力回避することができる。
【００４５】
弁座形成部１７は、第１および第２仕切り壁１７ａ，１７ｂの周方向複数箇所が、相互間での流体の流通を許容する連結壁１７ｃを介して連結されて成るものであり、流体の流通抵抗が大きくなるのを回避しつつ第１および第２仕切り壁１７ａ，１７ｂの強度を維持することができる。
【００４６】
また弁座形成部１７の第２仕切り壁１７ｂには、前記弁軸１５の軸方向移動を可能とするようにして該弁軸１５を同軸に囲繞する円筒状のガイド筒２３が一体に設けられ、コイル３５状の戻しばね２９が、前記ガイド筒２３および弁軸１５を囲繞して第２仕切り壁１７ｂおよび弁体１４間に縮設されるので、戻しばね２９をガイドするための専用の部材を不要とすることができる。
【００４７】
ところでモールド封止体１６のコイル封止部１８には、コイル３５に連なる端子４４を臨ませたカプラ４５が一体に設けられ、該カプラ４５を外方に突出させる開口部４６が前記ソレノイドハウジング３７の開口端側に設けられているので、カプラ４５をソレノイドハウジング３７の所定位置に位置決め配置することができるとともに、ソレノイドハウジング３７内でのコイル封止部１８の周方向変位を防止することができる。
【００４８】
またソレノイドハウジング３７は、第３シール部材４０を弾発的に接触させる内径を有する閉塞端側の小径孔部３７ａと、小径孔部３７ａよりも大径に形成されるとともに前記コイル封止部１８の外周との間に環状間隙４２を形成する大径孔部３７ｂを有して開口端側に向かうにつれて段階的に大径となるように形成されるので、コイル封止部１８にソレノイドハウジング３７を被せる際に、第３シール部材４０がソレノイドハウジング３７の内面に接触摺動する範囲を極力小さくし、コイル封止部１８にソレノイドハウジング３７を被せるのに必要な力を小さくして組付け性を向上するとともに第３シール部材４０に損傷が生じることを極力回避することができる。
【００４９】
さらにエンドプレート３８は、前記ボビン３４の開閉弁５側端面に当接する円盤部３８ａと、該円盤部３８ａの外周に一端を連ならせて前記ボビン３４の一部を囲繞する円筒部３８ｂと、該円筒部３８ｂの他端から半径方向外方に張り出すとともに外周部が前記モールド封止体１６から突出する鍔部３８ｃとを一体に備え、第２シール部材２０が、側面視では前記円盤部３８ａと少なくとも一部が重なる位置で弁座形成部１７の外周に装着されている。
【００５０】
したがって第２シール部材２０およびエンドプレート３８間の距離を協力小さく設定して、弁装置の軸方向長さを極力短縮することができる。
【００５１】
さらにボビン３４には、可動コア３２を摺動可能に嵌合せしめて円筒状に形成される非磁性材料製のガイドカラー３９が挿入、固定されており、このガイドカラー３９により可動コア３２を安定してガイドすることができる。
【００５２】
以上、本発明の実施例を説明したが、本発明は上記実施例に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。
【００５３】
【発明の効果】
以上のように請求項１の発明によれば、弁ハウジングを１部材で構成するようにして部品点数の低減を図るとともに弁ハウジングを組付ける手間を省いて組付工数を減少し、コスト低減に寄与することができる。またソレノイドハウジングに対する弁ハウジングの周方向相対位置を自由に選ぶことができ、上流側接続管および下流側接続管の設定位置の自由度を向上することができる。しかもハウジング主部に上流側接続管および下流側接続管が一体に連なるものであるので、両接続管の取付け代を不要として弁ハウジングを軸方向に小型化することができるとともにリーク対策が不要となる。また、第１および第２シール部材を予め装着して小組みした弁座形成部を弁ハウジング内に挿入、固定することで、上流側接続管に連なる弁室と、下流側接続管に連なる空気室とを両室相互のシール性および空気室の外部とのシール性を維持しつつ弁ハウジング内に形成することができ、組付け性を良好とすることができる。
【００５４】
また請求項２の発明によれば、切削加工等の面倒な加工を不要としつつ、エンドプレートおよびハウジング主部を係合せしめる段差部分をソレノイドハウジングに容易に形成するようにして、低コスト化を図ることができる。
【００５５】
請求項３の発明によれば、弁座形成部の弁ハウジングへの挿入に必要な力を小さくして組付け性を向上するとともに第１シール部材に損傷が生じることを極力回避することができる。
【００５６】
請求項４の発明によれば、コイルに連なる導線の振動による断線やショートが生じることを極力防止することができる。
【００５７】
請求項５の発明によれば、コイル組立体およびエンドプレートが結合されるモールド封止体を弁ハウジングに組付けるようにして組付け性を高めることを可能としつつ、モールド封止体の内部および外部間のシールを確実にすることができる。
【００５８】
請求項６の発明によれば、カプラをソレノイドハウジングの所定位置に位置決め配置することができるとともに、ソレノイドハウジング内でのコイル封止部の周方向変位を防止することができる。
【００５９】
請求項７の発明によれば、コイル封止部にソレノイドハウジングを被せる際に必要な力を小さくして組付け性を向上するとともに第３シール部材に損傷が生じることを極力回避することができる。
【００６０】
さらに請求項８の発明によれば、第２シール部材およびエンドプレート間の距離を協力小さく設定して、弁装置の軸方向長さを極力短縮することができる。
【図面の簡単な説明】
【図１】弁装置の縦断面図である。
【符号の説明】
５・・・・開閉弁
６・・・・ソレノイド
７・・・・弁ハウジング
８・・・・ハウジング主部
８ａ・・・第１孔部
８ｂ・・・第２孔部
９・・・・上流側接続管
１０・・・下流側接続管
１１・・・弁室
１２・・・弁孔
１３・・・弁座
１４・・・弁体
１５・・・弁軸
１６・・・モールド封止体
１７・・・弁座形成部
１７ａ・・第１仕切り壁
１７ｂ・・第２仕切り壁
１８・・・コイル封止部
１９・・・第１シール部材
２０・・・第２シール部材
３２・・・可動コア
３３・・・固定コア
３４・・・ボビン
３５・・・コイル
３６・・・コイル組立体
３７・・・ソレノイドハウジング
３７ａ・・小径孔部
３７ｂ・・大径孔部
３７ｃ・・彎曲部
３７ｄ・・嵌合筒部
３８・・・エンドプレート
３８ａ・・円盤部
３８ｂ・・円筒部
３８ｃ・・鍔部
４０・・・第３シール部材
４２・・・環状間隙
４３・・・段部
４４・・・端子
４５・・・カプラ
４６・・・開口部[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a valve device, and more particularly to an improvement in a valve device in which a valve body of an on-off valve spring-biased in a valve opening direction is driven in a valve closing direction by a solenoid.
[0002]
[Prior art]
  Conventionally, such a valve device is disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-248433, and in this device, the valve device is used to control the flow rate of secondary air supplied to an exhaust system of an engine. Yes.
[0003]
[Problems to be solved by the invention]
  However, in the valve device disclosed in the above publication, the valve housing of the on-off valve is formed by combining a valve case to which the downstream connection pipe is attached and a cover to which the upstream connection pipe is attached. Man-hours are relatively large, making it difficult to reduce costs.
[0004]
  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a valve device that can reduce the number of parts and the number of assembling steps and can reduce the cost.
[0005]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is a valve housing in which an upstream connecting pipe and a downstream connecting pipe are provided in series, and a valve formed in the valve housing through the upstream connecting pipe. A valve seat that faces the chamber and communicates with the downstream connecting pipe at a central portion thereof, and is fixedly disposed in the valve housing, and the valve seat can be closed by being seated on the valve seat An on-off valve having a valve body housed in a chamber and spring-biased to open the valve hole, and a valve shaft penetrating the valve hole so as to be axially movable and connected to the valve body A movable core coaxially connected to the valve shaft, a fixed core coaxially facing the movable core, and a coil assembly in which a coil is wound around a movable core and a bobbin surrounding the fixed core; The fixed assembly is formed in a bottomed cylindrical shape covering the coil assembly. A magnetic metal solenoid housing coupled to the valve housing and a closed end of the solenoid housing with the coil assembly sandwiched between the solenoid housing and the solenoid housing. And a solenoid having an end plate made of magnetic metal, wherein the valve housing includes a bottomed cylindrical housing main portion and the upstream side extending laterally from a side surface of the housing main portion. It has a connecting pipe and a downstream connecting pipe and is integrally molded.AsThe housing main part and the open end of the solenoid housing are connected by caulking.An annular first seal that is fitted into the housing main portion between the connecting portion of the upstream connecting pipe and the downstream connecting tube connected to the housing main portion and elastically contacts the inner surface of the housing main portion on the outer periphery. A disc-shaped first partition wall on which a member is mounted and a housing main portion of the downstream connecting pipe connected to the housing main portion at a position sandwiched between the first partition wall and the outer periphery Includes a valve seat forming portion formed by connecting a disc-shaped second partition wall to which an annular second seal member that elastically contacts the inner surface of the housing main portion is connected at a plurality of locations in the circumferential direction. A valve hole penetrating through the central portion of the first partition wall, which is inserted and fixed to the closed end of the main portion of the housing and forms the valve chamber, and an opening end of the valve hole on the valve chamber side. A surrounding annular valve seat is providedIt is characterized by that.
[0006]
  According to such a configuration of the first aspect of the present invention, the valve housing has a housing main portion, an upstream connection pipe, and a downstream connection pipe, and is integrally molded. As a single member, the number of parts can be reduced, and the labor for assembling the valve housing can be eliminated, the number of assembling steps can be reduced, and the cost can be reduced. In addition, since the valve housing and the solenoid housing are connected by caulking, the relative position in the circumferential direction of the valve housing with respect to the solenoid housing can be freely selected, and the degree of freedom of the setting positions of the upstream connection pipe and the downstream connection pipe can be improved. it can. In addition, when the upstream side connecting pipe and the downstream side connecting pipe are attached to different members, an installation allowance is required, so that the axial length of the valve housing becomes relatively large and a countermeasure against leakage of the mounting portion is required. However, since the upstream connecting pipe and the downstream connecting pipe are integrally connected to the main portion of the housing, the valve housing can be downsized in the axial direction without the need for an attachment, and the countermeasure against leakage is not required. .Also, by inserting and fixing a valve seat forming portion, which is pre-mounted with the first and second seal members, into the valve housing, the valve chamber connected to the upstream connection pipe and the air connected to the downstream connection pipe The chamber can be formed in the valve housing while maintaining the sealability between the two chambers and the outside of the air chamber, and the assemblability can be improved.
[0007]
  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, an annular stepped portion facing the opposite side of the solenoid is provided on the outer periphery of the opening end of the valve housing. The open end is fitted with a bent portion that is bent inward so as to increase in diameter toward the valve housing, and the open end of the housing main portion and the outer periphery of the end plate. Thus, a fitting cylinder portion connected to the large-diameter end of the bent portion is provided, and the end portion of the fitting cylinder portion opposite to the bent portion is between the large-diameter end of the bent portion and the housing. It is characterized by being caulked and engaged with the step portion of the main portion of the housing so as to sandwich the opening end portion of the main portion and the end plate.
[0008]
  According to the configuration of the invention described in claim 2, the step portion for engaging the end plate and the housing main portion can be easily formed in the solenoid housing while eliminating troublesome processing such as cutting. Can reduce costs.
[0009]
  Claim3The invention described is the above claim.1 or 2In addition to the configuration of the invention described above, the housing main portion is formed with a first hole portion into which the first partition wall is fitted, and a second hole formed with a larger diameter than the first hole portion and into which the second partition wall is fitted. And having a two-hole portion so that the diameter gradually increases toward the opening end side. According to such a configuration, when the valve seat forming portion is inserted into the valve housing, The range in which one seal member contacts and slides on the inner surface of the valve housing is made as small as possible, the force required for inserting the valve seat forming portion into the valve housing is reduced to improve assembly and damage to the first seal member Can be avoided as much as possible.
[0010]
  Claim4The invention described is the above claim 1.To any of ~ 3In addition to the configuration of the invention described above, a coil sealing portion made of a synthetic resin that covers the coil and is mold-bonded to the coil assembly is fitted into the solenoid housing. It is possible to prevent the occurrence of disconnection or short-circuit due to the vibration of the conducting wire connected to the line as much as possible.
[0011]
  Claim5The invention described is the above claim.1 to 3In addition to the configuration of the invention described above, an annular third seal that is molded and coupled to the coil assembly so as to cover the coil, is fitted into the solenoid housing, and elastically contacts the inner periphery of the solenoid housing. A synthetic resin mold sealing body in which a coil sealing portion on which a member is mounted on the outer periphery and the valve seat forming portion on which the first and second seal members are mounted on the outer periphery are integrally formed, The end plate is embedded with the outer peripheral portion of the end plate exposed.
[0012]
  Such claims5According to the configuration of the invention, the mold sealing body to which the coil assembly and the end plate are coupled can be assembled to the valve housing to improve the assemblability, and the inside and outside of the mold sealing body. The seal between can be ensured.
[0013]
  Claim6The invention described is the above claim.4Or5In addition to the configuration of the invention described above, the coil sealing portion is integrally provided with a coupler facing a terminal connected to the coil, and an opening for projecting the coupler outward is provided in the solenoid housing. According to this configuration, the coupler can be positioned and arranged at a predetermined position of the solenoid housing, and the circumferential displacement of the coil sealing portion in the solenoid housing can be prevented.
[0014]
  Claim7The invention described is the above claim.5In addition to the configuration of the invention described above, the solenoid housing is formed with a small-diameter hole portion on the closed end side having an inner diameter for elastically contacting the third seal member, and a larger diameter than the small-diameter hole portion, and According to such a configuration, a large-diameter hole portion that forms an annular gap is formed between the outer periphery of the coil sealing portion and the diameter gradually increases toward the opening end side. For example, when the solenoid housing is put on the coil sealing portion of the mold sealing body, the range in which the third seal member contacts and slides on the inner surface of the solenoid housing is minimized, and the coil sealing portion is put on the solenoid housing. The required force can be reduced to improve the assemblability, and damage to the third seal member can be avoided as much as possible.
[0015]
  Further claims8The invention described is the above claim.5In addition to the configuration of the invention described above, the end plate includes a disc portion that abuts on an end face of the bobbin on the on-off valve side, and a cylindrical portion that surrounds a part of the bobbin by connecting one end to the outer periphery of the disc portion. And a flange portion projecting radially outward from the other end of the cylindrical portion and having an outer peripheral portion protruding from the mold sealing body, wherein the second seal member is at least in contact with the disk portion in a side view. It is attached to the outer periphery of the valve seat forming portion at a position where a part thereof overlaps.
[0016]
  Such claims8According to the configuration of the described invention, the distance between the second seal member and the end plate can be set to be small in cooperation, and the axial length of the valve device can be shortened as much as possible.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.
[0018]
  In FIG. 1, this valve device is for controlling the flow rate of secondary air supplied to the exhaust system of an engine, for example, and comprises an on-off valve 5 and a solenoid 6 that drives the on-off valve 5 to open and close. Is done.
[0019]
  The on-off valve 5 faces the valve housing 7 integrally provided with the upstream connecting pipe 9 and the downstream connecting pipe 10 and the valve chamber 11 formed in the valve housing 7 through the upstream connecting pipe 9 and is connected downstream. The valve hole 12 communicating with the pipe 10 is opened at the center, and the valve seat 13 is fixedly arranged in the valve housing 7. The valve chamber 12 can be closed by being seated on the valve seat 13. The valve body 14 is housed and spring-biased to open the valve hole 12, and the valve shaft 15 extends through the valve hole 12 so as to be movable in the axial direction and is connected to the valve body 14.
[0020]
  The valve housing 7 includes a bottomed cylindrical housing main portion 8 and the upstream connection tube 9 and the downstream connection tube 10 that extend laterally from the side surface of the housing main portion 8 and are integrally molded. The upstream connection tube 9 is integrally connected to the side surface near the closed end of the housing main portion 8, and the downstream connection tube 10 is integrally connected to the side surface in the axial direction of the housing main portion 8.
[0021]
  A valve seat forming portion 17 made of synthetic resin is inserted into and fixed to the housing main portion 8, and the valve seat forming portion 17 is the housing main portion 8 of the upstream connecting pipe 9 and the downstream connecting pipe 10. A disk-shaped first partition wall 17a fitted with the housing main portion 8 between the continuous portions and attached with an annular first seal member 19 that elastically contacts the inner surface of the housing main portion 8 on the outer periphery. And the downstream connecting pipe 10 is connected to the housing main portion 8 at a position where the connecting portion to the housing main portion 8 is sandwiched between the first partition wall 17a and the inner surface of the housing main portion 8 on the outer periphery. The disc-shaped second partition wall 17b on which the annular second seal member 20 that is elastically contacted is attached to a plurality of locations in the circumferential direction so as to allow fluid flow between them. It is connected via a connecting wall 17c. .
[0022]
  The first partition wall 17a forms a valve chamber 11 between the closed end of the housing main portion 8 and the first partition wall 17a has a valve hole 12 penetrating through the central portion thereof and a valve hole thereof. 12 and an annular valve seat 13 surrounding the open end of the valve chamber 11 side is provided.
[0023]
  A fluid chamber 21 that always communicates with the valve hole 12 is formed between the first and second partition walls 17 a and 17 b, and the fluid chamber 21 is connected to the downstream connection pipe 10.
[0024]
  On the other hand, the housing main part 8 has a first hole 8a for fitting the first partition wall 17a and a second hole part formed to have a larger diameter than the first hole 8a and for fitting the second partition wall 17b. 8b and is formed so as to gradually increase in diameter toward the opening end side. Moreover, a first taper portion 8c is formed between the first and second holes 8a and 8b, and a second taper portion 8d is formed at the opening end of the second hole 8b. These taper portions 8c , 8d facilitates the operation of inserting the valve seat forming portion 17 into the housing main portion 8.
[0025]
  A cylindrical guide tube 23 extending toward the first partition wall 17a is integrally provided at the center of the second partition wall 17b, and the guide tube 23 allows the valve shaft 15 to move in the axial direction. So go.
[0026]
  The valve body 14 is formed in a disc shape from a synthetic resin, and a ring member 24 made of a rigid material is embedded in the valve body 14. On the other hand, the distal end portion of the valve shaft 15 passes through the valve hole 12 coaxially and enters the valve chamber 11, and the distal end portion of the valve shaft 15 penetrates the central portion of the valve body 14 in the valve chamber 11. . In addition, a pair of metal seal receiving members 25 and 26 are inserted into the valve shaft 15 on both sides of the valve body 14 so that the engagement claw portions 25a and 26a provided on the inner periphery thereof bite into the outer periphery of the valve shaft 15. The annular seal members 27 and 28 are interposed between the seal receiving members 25 and 26 and the valve body 14, respectively.
[0027]
  A coiled return spring 29 surrounding the valve shaft 15 and the guide cylinder 23 is provided between the seal receiving member 25 and the second partition wall 17b, and the spring force of the return spring 29 causes the valve body 14 and The valve shaft 15 is biased to the side where the valve body 14 is separated from the valve seat 13 and opens the valve hole 12.
[0028]
  The solenoid 6 includes a movable core 32 that is coaxially connected to the valve shaft 15 of the on-off valve 5, a fixed core 33 that is coaxially opposed to the movable core 32, and a bobbin that surrounds the movable core 32 and the fixed core 33. 34, a coil assembly 36 having a coil 35 wound thereon, and a bottomed cylindrical shape covering the coil assembly 36, which is magnetically coupled to the fixed core 33 and coupled to the valve housing 7. A magnetic metal solenoid housing 37 and a magnetic metal end plate 38 magnetically coupled to the solenoid housing 37 with the coil assembly 36 sandwiched between the closed end of the solenoid housing 37. Have.
[0029]
  A guide collar 39 made of a non-magnetic material, which is formed in a cylindrical shape by inserting the movable core 32 slidably into the bobbin 34, is inserted and fixed, and the fixed core 33 also corresponds to the movable core 32 and is guided. It is inserted into the collar 39. In addition, the fixed core 33 is caulked and coupled to the central portion of the closed end of the solenoid housing 37 having a bottomed cylindrical shape.
[0030]
  Further, a synthetic resin coil sealing portion 18 covering the coil 35 is mold-coupled to the coil assembly 36, and an annular third seal member 40 that elastically contacts the inner periphery of the solenoid housing 37 is mounted on the outer periphery. The coil sealing portion 18 is fitted into the solenoid housing 37.
[0031]
  Moreover, the coil sealing portion 18 and the valve seat forming portion 17 of the on-off valve 5 are integrally formed as the mold sealing body 16, and the end plate 38 exposes the outer peripheral portion of the end plate 38. And embedded in the mold sealing body 16.
[0032]
  The mold sealing body 16 is provided with a regulating surface 41 that can come into contact with the movable core 32 to regulate the moving end of the movable core 32 on the side away from the fixed core 33.
[0033]
  The solenoid housing 37 is formed with a small-diameter hole portion 37a on the closed end side having an inner diameter that elastically contacts the third seal member 40, and a larger diameter than the small-diameter hole portion 37a, and the coil sealing portion 18 It has a large-diameter hole portion 37b that forms an annular gap 42 between the outer periphery and a bottomed cylindrical shape in which the opening / closing valve 5 side is opened so that the diameter gradually increases toward the opening end side. The solenoid housing 37 is formed at the opening end portion thereof, and a bent portion 37c that is bent inward so as to increase in diameter toward the valve housing 7 side, and the housing main portion 8 A fitting cylinder portion 37d that is connected to the large-diameter end of the bent portion 37c is provided so as to fit the opening end portion and the outer peripheral portion of the end plate 38.
[0034]
  On the other hand, an annular step 43 facing the opposite side of the solenoid 6 is provided on the outer periphery of the opening end of the valve housing 7, and the end of the fitting cylinder 37d opposite to the bent portion 37c is the bent portion. The solenoid housing 37 and the valve housing 7 are engaged by caulking engagement with the stepped portion 43 of the housing main portion 8 so as to sandwich the open end portion of the housing main portion 8 and the end plate 38 between the large diameter end of the portion 37c. Are connected to each other.
[0035]
  The coil sealing portion 18 is integrally provided with a coupler 45 facing a terminal 44 connected to the coil 35, and an opening 46 for projecting the coupler 45 outward is provided on the opening end side of the solenoid housing 37. .
[0036]
  The end plate 38 includes a disc portion 38a that contacts the end face of the bobbin 34 on the on-off valve 5 side, a cylindrical portion 38b that surrounds a part of the bobbin 34 with one end connected to the outer periphery of the disc portion 38a, The second sealing member 20 is integrally provided with a flange portion 38c that projects radially outward from the other end of the cylindrical portion 38b and whose outer peripheral portion protrudes from the mold sealing body 16, and the second sealing member 20 in the side view is the disc portion 38a. And is mounted on the outer periphery of the valve seat forming portion 17 at a position where at least a part thereof overlaps.
[0037]
  Next, the operation of this embodiment will be described. The valve housing 7 of the on-off valve 5 has a housing main portion 8, an upstream connection pipe 9, and a downstream connection pipe 10, and is integrally molded. Therefore, it is possible to reduce the number of parts by constituting the valve housing 7 with a single member, and to reduce the number of assembling steps by eliminating the trouble of assembling the valve housing 7, thereby contributing to cost reduction. In addition, when the upstream connecting pipe 9 and the downstream connecting pipe 10 are attached to separate members, an installation allowance is required, so that the axial length of the valve housing 7 becomes relatively large, and measures against leakage at the mounting portion are taken. Although it is necessary, since the upstream connecting pipe 9 and the downstream connecting pipe 10 are integrally connected to the housing main portion 8, the valve housing 7 can be downsized in the axial direction without the need for an installation fee. At the same time, measures against leakage are not required.
[0038]
  A valve chamber 11 is formed between the valve housing 7 and is fitted into the valve housing 7, and a valve hole 12 and an annular valve seat 13 surrounding the open end of the valve hole 12 on the valve chamber 11 side are provided. The first partition wall 17a and the second partition wall 17b fitted to the valve housing 7 are formed integrally with the first partition wall 17a by forming a fluid chamber 21 that always communicates with the valve hole 12 therebetween. Synthetic resin in which a coil sealing portion 18 is integrally connected to the seat forming portion 17 so as to cover the coil 35 on the solenoid 6 side and to be mold-coupled to the coil assembly 36 and to be hermetically fitted to the solenoid housing 37. An end plate 38 is embedded in the molded mold sealing body 16 with the outer peripheral portion of the end plate 38 exposed.
[0039]
  Therefore, it is not necessary to separately provide a member for forming the valve seat 13 and the number of parts is reduced, and the coil assembly 36, the end plate 38 and the valve seat 13 can be integrally assembled to reduce the number of assembling steps. In addition, it is possible to contribute to cost reduction and to ensure a seal between the inside and the outside of the mold sealing body 16. Further, since the coil sealing portion 18 that covers the coil 35 and is molded and joined to the coil assembly 36 is fitted into the solenoid housing 37, it is possible to prevent the occurrence of disconnection or short-circuit due to the vibration of the conducting wire connected to the coil 35 as much as possible. Can do.
[0040]
  Moreover, since the valve housing 7 and the solenoid housing 37 are caulked and coupled, the relative position in the circumferential direction of the valve housing 7 with respect to the solenoid housing 37 can be freely selected, and the setting positions of the upstream connection pipe 9 and the downstream connection pipe 10 can be freely set. The degree can be improved.
[0041]
  Further, an annular step 43 facing the opposite side of the solenoid 6 is provided on the outer periphery of the opening end of the valve housing 7, and the opening end of the solenoid housing 37 has a diameter that increases toward the valve housing 7. And a bent portion 37c that is bent inwardly, and an open end portion of the housing main portion 8 and an outer peripheral portion of the end plate 38 so as to be connected to the large-diameter end of the bent portion 37c. An opening end portion of the housing main portion 8 and an end plate between the end portion of the fitting cylinder portion 37d opposite to the bent portion 37c and the large-diameter end of the bent portion 37c. It is caulked and engaged with the stepped portion 43 of the housing main portion 8 so as to sandwich 38.
[0042]
  Therefore, it is not necessary to perform troublesome machining such as cutting on the solenoid housing 37, and a stepped portion for engaging the end plate 38 and the housing main portion 8 is easily formed on the solenoid housing 37, thereby reducing the cost. Can be achieved.
[0043]
  An annular first seal member 19 that elastically contacts the inner surface of the housing main portion 8 is mounted on the outer periphery of the first partition wall 17a included in the valve seat forming portion 17, and the housing is mounted on the outer periphery of the second partition wall 17b. An annular second seal member 20 that elastically contacts the inner surface of the main portion 8 is mounted, and a valve seat forming portion 17 that is assembled in advance by mounting the first and second seal members 19 and 20 in advance is provided in the valve housing 7. The valve chamber 11 connected to the upstream connection pipe 9 and the fluid chamber 21 connected to the downstream connection pipe 10 maintain the mutual sealing performance and the sealing performance with the outside of the fluid chamber 21 by being inserted and fixed inside. However, it can be formed in the valve housing 7 and the assemblability can be improved. Further, the coil sealing portion 18 is fitted into the solenoid housing 37 via an annular third seal member 40 mounted on the outer periphery thereof, and is molded and sealed while reducing the axial length of the solenoid 6 as much as possible. The inside of the stop body 16 can be sealed between the outside.
[0044]
  Moreover, the housing main portion 8 has a first hole portion 8a for fitting the first partition wall 17a and a second hole portion 8b formed with a larger diameter than the first hole portion 8a and for fitting the second partition wall 17b. The first seal member 19 is formed on the inner surface of the valve housing 7 when the valve seat forming portion 17 is inserted into the valve housing 7. The range of contact sliding is reduced as much as possible, the force required for inserting the valve seat forming portion 17 into the valve housing 7 is reduced to improve the assembling property and the first seal member 19 is damaged as much as possible. It can be avoided.
[0045]
  The valve seat forming portion 17 is formed by connecting a plurality of circumferential locations of the first and second partition walls 17a and 17b via connection walls 17c that allow fluid to flow between each other. The strength of the first and second partition walls 17a and 17b can be maintained while avoiding an increase in the flow resistance.
[0046]
  The second partition wall 17b of the valve seat forming portion 17 is integrally provided with a cylindrical guide cylinder 23 that coaxially surrounds the valve shaft 15 so that the valve shaft 15 can be moved in the axial direction. Since the return spring 29 in the form of a coil 35 surrounds the guide cylinder 23 and the valve shaft 15 and is contracted between the second partition wall 17b and the valve body 14, a dedicated member for guiding the return spring 29 Can be made unnecessary.
[0047]
  Incidentally, the coil sealing portion 18 of the mold sealing body 16 is integrally provided with a coupler 45 facing the terminal 44 connected to the coil 35, and an opening 46 for projecting the coupler 45 outward is provided in the solenoid housing 37. Since the coupler 45 can be positioned and arranged at a predetermined position of the solenoid housing 37, the circumferential displacement of the coil sealing portion 18 in the solenoid housing 37 can be prevented. .
[0048]
  The solenoid housing 37 is formed with a small-diameter hole portion 37a on the closed end side having an inner diameter for elastically contacting the third seal member 40 and a larger diameter than the small-diameter hole portion 37a and the coil sealing portion 18. Since the large-diameter hole portion 37b that forms the annular gap 42 is formed between the outer periphery of the coil housing and the outer diameter of the coil sealing portion 18 increases toward the opening end side, the solenoid housing 37 is provided in the coil sealing portion 18. When covering, the range in which the third seal member 40 contacts and slides on the inner surface of the solenoid housing 37 is reduced as much as possible, and the force required to cover the solenoid housing 37 on the coil sealing portion 18 is reduced. As a result, it is possible to prevent the third seal member 40 from being damaged as much as possible.
[0049]
  Further, the end plate 38 includes a disc portion 38a that contacts the end face of the bobbin 34 on the on-off valve 5 side, a cylindrical portion 38b that surrounds a part of the bobbin 34 with one end connected to the outer periphery of the disc portion 38a, The cylindrical portion 38b projects from the other end in the radial direction and an outer peripheral portion integrally includes a flange portion 38c protruding from the mold sealing body 16, and the second seal member 20 has the disc portion in a side view. It is mounted on the outer periphery of the valve seat forming portion 17 at a position at least partially overlapping with 38a.
[0050]
  Therefore, the distance between the second seal member 20 and the end plate 38 can be set to be small, and the axial length of the valve device can be shortened as much as possible.
[0051]
  Furthermore, a guide collar 39 made of a non-magnetic material, which is formed in a cylindrical shape by fitting the movable core 32 in a slidable manner, is inserted into and fixed to the bobbin 34. The guide collar 39 stabilizes the movable core 32. Can guide.
[0052]
  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.
[0053]
【The invention's effect】
  As described above, according to the first aspect of the present invention, the number of parts can be reduced by configuring the valve housing with a single member, and the labor for assembling the valve housing can be saved to reduce the number of assembling steps, thereby reducing the cost. Can contribute. Further, the relative position of the valve housing in the circumferential direction with respect to the solenoid housing can be freely selected, and the degree of freedom of the setting positions of the upstream connecting pipe and the downstream connecting pipe can be improved. Moreover, since the upstream connecting pipe and the downstream connecting pipe are integrally connected to the main portion of the housing, the valve housing can be downsized in the axial direction without the need to install both connecting pipes, and countermeasures against leakage are not required. Become.Also, by inserting and fixing a valve seat forming portion, which is pre-mounted with the first and second seal members, into the valve housing, the valve chamber connected to the upstream connection pipe and the air connected to the downstream connection pipe The chamber can be formed in the valve housing while maintaining the sealability between the two chambers and the outside of the air chamber, and the assemblability can be improved.
[0054]
  Further, according to the invention of claim 2, the step of engaging the end plate and the main portion of the housing can be easily formed in the solenoid housing while eliminating troublesome processing such as cutting, thereby reducing the cost. Can be planned.
[0055]
  Claim3According to this invention, it is possible to reduce the force required for inserting the valve seat forming portion into the valve housing to improve the assemblability and to avoid the occurrence of damage to the first seal member as much as possible.
[0056]
  Claim4According to this invention, it is possible to prevent the occurrence of disconnection or short-circuit due to the vibration of the conductive wire connected to the coil as much as possible.
[0057]
  Claim5According to the invention, the mold sealing body to which the coil assembly and the end plate are coupled can be assembled to the valve housing to improve the assemblability, and between the inside and the outside of the mold sealing body. The seal can be ensured.
[0058]
  Claim6According to the invention, the coupler can be positioned and arranged at a predetermined position of the solenoid housing, and the circumferential displacement of the coil sealing portion in the solenoid housing can be prevented.
[0059]
  Claim7According to the invention, it is possible to reduce the force required when the solenoid housing is put on the coil sealing portion to improve the assembling property and to prevent the third seal member from being damaged as much as possible.
[0060]
  Further claims8According to the invention, the distance between the second seal member and the end plate can be set to be small in cooperation, and the axial length of the valve device can be shortened as much as possible.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a valve device.
[Explanation of symbols]
5 ... Open / close valve
6 ... Solenoid
7. Valve housing
8 ... Main part of housing
8a ... 1st hole
8b ... 2nd hole
9 ... Upstream connection pipe
10 ... Downstream connection pipe
11 ... Valve chamber
12 ... Valve hole
13 ... Valve seat
14 ... Valve
15 ... Valve stem
16 ... Mold sealing body
17 ... Valve seat forming part
17a ... first partition wall
17b ... Second partition wall
18 ... Coil sealing part
19: First seal member
20: Second seal member
32 ... movable core
33 ... Fixed core
34 ... Bobbin
35 ... Coil
36 ... Coil assembly
37 ... Solenoid housing
37a ・・ Small hole
37b ... Large diameter hole
37c ・・ Folding part
37d ・・ Fitting cylinder
38 ... End plate
38a ... disc part
38b ・・ Cylindrical part
38c ...
40: Third seal member
42 ... annular gap
43 ... Step
44 ... Terminal
45 ... Coupler
46 ... opening

Claims

A valve housing (7) in which an upstream connecting pipe (9) and a downstream connecting pipe (10) are connected, and a valve chamber formed in the valve housing (7) through the upstream connecting pipe (9) A valve seat (13) facing the (11) and communicating with the downstream connecting pipe (10) at a central portion with the valve hole (12) being opened in the center, and the valve seat ( The valve body (14) is seated in 13) and can be closed in the valve hole (12) and is housed in the valve chamber (11) and spring-biased to open the valve hole (12). And an on-off valve (5) having a valve shaft (15) penetrating the valve hole (12) so as to be axially movable and connected to the valve body (14);
A movable core (32) coaxially connected to the valve shaft (15), a fixed core (33) coaxially opposed to the movable core (32), a movable core (32), and a fixed core (33) A coil assembly (36) in which a coil (35) is wound around a bobbin (34) that surrounds the coil assembly, and a bottomed cylindrical shape that covers the coil assembly (36) and is formed on the fixed core (33). The coil assembly (36) is disposed between a magnetic metal solenoid housing (37) which is magnetically coupled to the valve housing (7) and a closed end of the solenoid housing (37). A solenoid (6) having a magnetic metal end plate (38) sandwiched and magnetically coupled to the solenoid housing (37);
The valve housing (7) includes a bottomed cylindrical housing main part (8) and the upstream connection pipe (9) and the downstream connection pipe (10) extending laterally from the side surface of the housing main part (8). ) and formed by molding integrally with a Rutotomoni, open end of the housing main portion (8) and the solenoid housing (37) is caulked bond,
The upstream connecting pipe (9) and the downstream connecting pipe (10) are fitted to the housing main part (8) between the connecting parts to the housing main part (8), and the housing main part ( 8) To the disk-shaped first partition wall (17a) to which the annular first seal member (19) that elastically contacts the inner surface of 8) is mounted, and to the housing main part (8) of the downstream connection pipe (10). Is connected to the housing main portion (8) at a position sandwiching the continuous portion between the first partition wall (17a) and the outer periphery is elastically contacted with the inner surface of the housing main portion (8). A valve seat forming portion (17) formed by connecting a disc-shaped second partition wall (17b) to which two seal members (20) are mounted at a plurality of locations in the circumferential direction is inserted into the housing main portion (8); Fixed,
A first partition wall (17a) forming the valve chamber (11) between the closed end of the housing main portion (8), a valve hole (12) penetrating through the center thereof, and the valve hole (12) An annular valve seat (13) surrounding the open end of the valve chamber (11) side of the valve device is provided .

An annular step (43) facing the side opposite to the solenoid (6) is provided on the outer periphery of the opening end of the valve housing (7), and the valve housing (7) is provided at the opening end of the solenoid housing (37). ) Fit the bent portion (37c) which is bent inwardly so as to increase in diameter toward the side, the open end portion of the housing main portion (8) and the outer peripheral portion of the end plate (38). And a fitting tube portion (37d) connected to the large-diameter end of the bent portion (37c) in such a manner that the end portion of the fitting tube portion (37d) opposite to the bent portion (37c) is provided. Is caulked to the stepped portion (43) of the housing main portion (8) so that the open end portion of the housing main portion (8) and the end plate (38) are sandwiched between the large diameter end of the bent portion (37c). 2. The valve device according to claim 1, wherein the valve device is engaged. .

The housing main portion (8) is formed with a first hole (8a) into which the first partition wall (17a) is fitted and a diameter larger than that of the first hole (8a). 3. The valve device according to claim 1 , wherein the valve device has a second hole portion (8 b) into which the diameter is increased and is formed so as to gradually increase in diameter toward the opening end side. 4.

The synthetic resin coil sealing portion (18) covering the coil (35) and mold-bonded to the coil assembly (36) is fitted into the solenoid housing (37). The valve apparatus in any one of -3 .

An annular ring that is molded and joined to the coil assembly (36) so as to cover the coil (35) and is fitted into the solenoid housing (37) and elastically contacts the inner periphery of the solenoid housing (37). The coil sealing part (18) to which the third seal member (40) is attached to the outer periphery, and the valve seat forming part (17) to which the first and second seal members (19, 20) are attached to the outer periphery. The end plate (38) is embedded in a synthetic resin mold sealing body (16) formed integrally so as to expose an outer peripheral portion of the end plate (38). The valve apparatus in any one of 1-3 .

The coil sealing portion (18) is integrally provided with a coupler (45) facing a terminal (44) connected to the coil (35), and an opening portion for projecting the coupler (45) outward ( The valve device according to claim 4 or 5 , characterized in that 46) is provided in the solenoid housing (37).

The solenoid housing (37) is formed to have a smaller diameter hole portion (37a) on the closed end side having an inner diameter for elastically contacting the third seal member (40) and a larger diameter than the small diameter hole portion (37a). In addition, a large-diameter hole portion (37b) that forms an annular gap (42) between the outer periphery of the coil sealing portion (18) and the diameter gradually increases toward the opening end side. 6. The valve device according to claim 5 , wherein the valve device is formed.

The end plate (38) has a disc part (38a) that contacts the end face of the bobbin (34) on the on-off valve (5) side, and one end connected to the outer periphery of the disc part (38a). ) And a flange (38c) projecting radially outward from the other end of the cylindrical portion (38b) and having an outer peripheral portion protruding from the mold sealing body. The second seal member (20) is provided integrally, and is mounted on the outer periphery of the valve seat forming portion (17) at a position at least partially overlapping the disc portion (38a) in a side view. 5. The valve device according to 5 .