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JP4036434B2 - Valve device - Google Patents

Valve device Download PDF

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Publication number
JP4036434B2
JP4036434B2 JP2002032511A JP2002032511A JP4036434B2 JP 4036434 B2 JP4036434 B2 JP 4036434B2 JP 2002032511 A JP2002032511 A JP 2002032511A JP 2002032511 A JP2002032511 A JP 2002032511A JP 4036434 B2 JP4036434 B2 JP 4036434B2
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JP
Japan
Prior art keywords
valve
housing
coil
hole
solenoid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002032511A
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Japanese (ja)
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JP2003232460A (en
Inventor
裕茂 秋山
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.)
Keihin Corp
Original Assignee
Keihin Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2002032511A priority Critical patent/JP4036434B2/en
Publication of JP2003232460A publication Critical patent/JP2003232460A/en
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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、ソレノイド側のボビンおよびエンドプレートと、開閉弁における弁ハウジングの一部を構成するとともに弁座が形成される弁ケースとが、別部材として構成されて相互に結合されており、部品点数が比較的多くなるとともに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、弁ハウジングと、弁ハウジング内に形成される弁室に臨むとともに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、弁ハウジングとの間に弁室を形成して弁ハウジングに嵌合されるとともに弁孔ならびに該弁孔の前記弁室側の開口端を囲む環状の弁座が設けられる第1仕切り壁と、前記弁孔に常時通じる流体室を第1仕切り壁との間に形成して弁ハウジングに嵌合される第2仕切り壁とを一体に有する弁座形成部に、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とともに前記ソレノイドハウジングに嵌合されるコイル封止部が一体に連設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。
【0006】
このような請求項1記載の発明の構成によれば、弁座が設けられる弁座形成部ならびにコイルを覆うコイル封止部を一体に有する合成樹脂製のモールド封止体に、外周部を露出させるようにしてエンドプレートが埋設されるので、弁座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、エンドプレートおよび弁座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る。またコイルを覆ってコイル組立体にモールド結合されるコイル封止部がソレノイドハウジングに嵌合されるので、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。
【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。
【0008】
請求項3記載の発明は、上記請求項1記載の発明の構成に加えて、前記弁座形成部の第2仕切り壁には、前記弁軸の軸方向移動を可能とするようにして該弁軸を同軸に囲繞する円筒状のガイド筒が一体に設けられ、コイル状の戻しばねが、前記ガイド筒および弁軸を囲繞して第2仕切り壁および弁体間に縮設されることを特徴とし、かかる構成によれば、戻しばね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。
【0009】
請求項4記載の発明は、上記請求項1記載の発明の構成に加えて、前記弁座形成部は、第1および第2仕切り壁の周方向複数箇所が、相互間での流体の流通を許容する支持壁を介して連結されて成ることを特徴とし、かかる構成によれば、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仕切り壁の強度を維持することができる。
【0010】
請求項5記載の発明は、上記請求項1記載の発明の構成に加えて、前記弁座形成部における第1および第2仕切り壁の外周に、弁ハウジングの内周に弾発的に接触する環状の第1および第2シール部材がそれぞれ装着されることを特徴とし、かかる構成によれば、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、弁室および流体室をそれらの間のシール性および流体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。
【0011】
請求項6記載の発明は、上記請求項5記載の発明の構成に加えて、前記コイル封止部の外周に、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シール部材が装着されることを特徴とし、かかる構成によれば、ソレノイドの軸方向長さを極力短縮しつつモールド封止体の内部を外部との間でシールすることができる。
【0012】
請求項7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ことを特徴とし、かかる構成によれば、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複数部品で構成するときの組付工数の増大を回避することができる。
【0013】
請求項8記載の発明は、上記請求項7記載の発明の構成に加えて、前記ハウジング主部は、外周に環状の第1シール部材が装着される第1仕切り壁を嵌合せしめる第1孔部と、外周に環状の第2シール部材が装着される第2仕切り壁を嵌合させるようにして第1孔部よりも大径に形成される第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時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。
【0014】
請求項9記載の発明は、上記請求項6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シール部材に損傷が生じることを極力回避することができる。
【0015】
請求項10記載の発明は、上記請求項9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。
【0016】
このような請求項10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。
【0017】
請求項11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し、かかる構成によれば、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。
【0018】
請求項12記載の発明は、上記請求項1記載の発明の構成に加えて、前記ボビンには、可動コア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が挿入、固定されることを特徴とし、かかる構成によれば、可動コアを安定してガイドすることができる。
【0019】
【発明の実施の形態】
以下、本発明の実施の形態を、添付の図面に示した本発明の一実施例に基づいて説明する。
【0020】
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。
【0021】
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。
【0022】
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。
【0023】
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。
【0024】
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。
【0025】
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。
【0026】
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。
【0027】
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をその軸方向の移動を可能とするようにして囲繞する。
【0028】
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。
【0029】
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。
【0030】
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。
【0031】
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。
【0032】
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。
【0033】
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。
【0034】
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。
【0035】
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。
【0036】
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。
【0037】
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。
【0038】
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。
【0039】
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。
【0040】
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、たとえば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。
【0041】
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。
【0042】
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。
【0043】
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。
【0044】
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。
【0045】
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。
【0046】
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。
【0047】
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。
【0048】
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。
【0049】
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。
【0050】
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。
【0051】
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。
【0052】
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。
【0053】
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。
【0054】
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。
【0055】
【発明の効果】
以上のように請求項1記載の発明によれば、弁座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、エンドプレートおよび弁座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る。また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。
【0056】
請求項2記載の発明によれば、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。
【0057】
請求項3記載の発明によれば、戻しばね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。
【0058】
請求項4記載の発明によれば、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仕切り壁の強度を維持することができる。
【0059】
請求項5記載の発明によれば、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、弁室および流体室をそれらの間のシール性および流体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。
【0060】
請求項6記載の発明によれば、ソレノイドの軸方向長さを極力短縮しつつモールド封止体の内部を外部との間でシールすることができる。
【0061】
請求項7記載の発明によれば、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複数部品で構成するときの組付工数の増大を回避することができる。
【0062】
請求項8記載の発明によれば、弁座形成部の弁ハウジングへの挿入時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。
【0063】
請求項9記載の発明によれば、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シール部材に損傷が生じることを極力回避することができる。
【0064】
請求項10記載の発明によれば、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。
【0065】
請求項11記載の発明によれば、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。
【0066】
さらに請求項12記載の発明によれば、可動コアを安定してガイドすることができる。
【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
17c・・・支持壁
18・・・コイル封止部
19・・・第1シール部材
20・・・第2シール部材
21・・・流体室
23・・・ガイド筒
29・・・戻しばね
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
39・・・ガイドカラー
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 solenoid-side bobbin and end plate, and a valve case that forms part of the valve housing of the on-off valve and that has a valve seat are configured as separate members. The number of parts is relatively large and the number of assembly steps is 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, a first aspect of the present invention is a valve housing and a valve which faces a valve chamber formed in the valve housing and is fixedly arranged in the valve housing with a valve hole opened in the center. A valve body that is seated in the valve seat so as to be able to close the valve hole and is housed in the valve chamber and is spring-biased to open the valve hole; and the valve hole in the axial direction An on-off valve having a valve shaft that movably penetrates and is connected to the valve body; a movable core that is coaxially connected to the valve shaft; and a fixed core that is coaxially opposed to the movable core; A coil assembly in which a coil is wound around a bobbin surrounding a movable core and a fixed core, a bottomed cylindrical shape covering the coil assembly, and magnetically coupled to the fixed core, and the valve A magnetic metal solenoid housing coupled to the housing; A solenoid having a magnetic metal end plate that is magnetically coupled to the solenoid housing with the coil assembly sandwiched between a closed end of the solenoid housing; A first partition wall provided with an annular valve seat that forms a valve chamber therebetween and is fitted into the valve housing and surrounds the valve hole and an opening end of the valve hole on the valve chamber side; A valve seat forming portion integrally forming a fluid chamber communicating therewith between the first partition wall and a second partition wall fitted to the valve housing is molded and coupled to the coil assembly so as to cover the coil. In addition, the end plate exposes the outer peripheral portion of the end plate on a synthetic resin mold sealing body in which a coil sealing portion fitted to the solenoid housing is integrally connected. Characterized in that it is embedded.
[0006]
According to the configuration of the invention described in claim 1, the outer peripheral portion is exposed to the synthetic resin mold sealing body integrally including the valve seat forming portion provided with the valve seat and the coil sealing portion covering the coil. Since the end plate is embedded as described above, it is not necessary to separately provide a member for forming the valve seat, and the number of parts can be reduced, and the coil assembly, the end plate and the valve seat can be integrally assembled. As a result, the assembly man-hours can be reduced and the cost can be reduced. Further, since the coil sealing portion that covers the coil and is molded and joined 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 conductive wire connected to the coil as much as possible.
[0007]
According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the coil sealing portion is integrally provided with a coupler facing a terminal connected to the coil. The solenoid housing is provided with an opening projecting in the direction, and according to such a configuration, the coupler can be positioned at a predetermined position of the solenoid housing, and the coil sealing portion in the solenoid housing can be positioned. Circumferential displacement can be prevented.
[0008]
According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the second partition wall of the valve seat forming portion is configured to allow the valve shaft to move in the axial direction. A cylindrical guide cylinder that coaxially surrounds the shaft is integrally provided, and a coiled return spring is contracted between the second partition wall and the valve body so as to surround the guide cylinder and the valve shaft. And according to this structure, the member for exclusive use for guiding a return spring can be made unnecessary.
[0009]
According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the invention, the valve seat forming portion is configured such that a plurality of circumferential positions of the first and second partition walls allow fluid to flow between each other. It is characterized by being connected via an allowable support wall, and according to such a configuration, it is possible to maintain the strength of the first and second partition walls while avoiding an increase in fluid flow resistance.
[0010]
According to a fifth aspect of the invention, in addition to the configuration of the first aspect of the invention, the outer periphery of the first and second partition walls in the valve seat forming portion is elastically contacted with the inner periphery of the valve housing. The annular first and second seal members are respectively mounted, and according to such a configuration, the valve seat forming portion in which the first and second seal members are mounted in advance and assembled is inserted into the valve housing. By fixing, the valve chamber and the fluid chamber can be formed in the valve housing while maintaining the sealing property between them and the sealing property with the outside of the fluid chamber, and the assembly property can be improved. it can.
[0011]
According to a sixth aspect of the invention, in addition to the configuration of the fifth aspect of the invention, an annular third seal member that elastically contacts the inner periphery of the solenoid housing is mounted on the outer periphery of the coil sealing portion. According to this configuration, the inside of the mold sealing body can be sealed with the outside while reducing the axial length of the solenoid as much as possible.
[0012]
According to a seventh aspect of the invention, in addition to the configuration of the first aspect of the invention, 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. The connecting pipe and the downstream connecting pipe are integrally molded, and according to such a configuration, the valve housing is constituted by one member so as to reduce the number of parts and the valve housing. It is possible to avoid an increase in the number of assembling steps when the is composed of a plurality of parts.
[0013]
According to an eighth aspect of the invention, in addition to the configuration of the seventh aspect of the invention, the housing main portion has a first hole for fitting a first partition wall on which an annular first seal member is mounted on the outer periphery. And an opening end side having a second hole portion having a larger diameter than the first hole portion so as to fit a second partition wall on which an annular second seal member is mounted on the outer periphery. In this configuration, the first seal member contacts the inner surface of the valve housing when the valve seat forming portion is inserted into the valve housing. It is possible to reduce the range of movement as much as possible, reduce the force required when the valve seat forming portion is inserted into the valve housing to improve the assemblability, and avoid the occurrence of damage to the first seal member as much as possible.
[0014]
According to a ninth aspect of the invention, in addition to the configuration of the sixth aspect of the invention, the solenoid housing includes a small-diameter hole portion on the closed end side having an inner diameter for elastically contacting the third seal member, and a small-diameter It has a large-diameter hole portion that is formed with a larger diameter than the hole portion and forms an annular gap between the outer periphery of the coil sealing portion so that the diameter gradually increases toward the opening end side. According to this configuration, 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. In addition, it is possible to reduce the force required to cover the solenoid housing over the coil sealing portion to improve the assembling property and to prevent the third seal member from being damaged as much as possible.
[0015]
According to a tenth aspect of the present invention, in addition to the configuration of the ninth aspect of the invention, an annular step portion facing the opposite side of the solenoid is provided on the outer periphery of the opening end portion of the valve housing, and the opening of the solenoid housing is provided. The end portion is fitted with a bent portion that is bent inward so as to increase in diameter toward the valve housing side, an opening end portion of the housing main portion, and an outer peripheral portion of the end plate. And a fitting tube portion connected to the large-diameter end of the bent portion, and the end of the fitting tube portion on the opposite side of the bent portion is between the large-diameter end of the bent portion and the main 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 portion and the end plate.
[0016]
According to the configuration of the invention described in claim 10, the step portion for 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. Cost reduction can be achieved.
[0017]
According to an eleventh aspect of the invention, in addition to the configuration of the fifth aspect of the invention, the end plate includes a disc portion that abuts on an end face on the on-off valve side of the bobbin, and one end connected to the outer periphery of the disc portion. A cylindrical portion surrounding a part of the bobbin, 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. The seal member is mounted on the outer periphery of the valve seat forming portion at a position at least partially overlapping with the disk portion in a side view, and according to such a configuration, the distance between the second seal member and the end plate is increased. By setting the cooperation small, the axial length of the valve device can be shortened as much as possible.
[0018]
According to a twelfth aspect of the invention, in addition to the configuration of the first aspect of the invention, the bobbin has a guide collar made of a non-magnetic material formed in a cylindrical shape by slidably fitting a movable core. It is characterized by being inserted and fixed, and according to such a configuration, the movable core can be stably guided.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.
[0020]
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.
[0021]
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.
[0022]
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.
[0023]
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. .
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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 can move the valve shaft 15 in the axial direction. And go.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
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.
[0033]
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.
[0034]
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.
[0035]
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.
[0036]
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.
[0037]
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. .
[0038]
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.
[0039]
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.
[0040]
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. The coil forming portion 17 is integrally connected to the seat forming portion 17 so as to cover the coil 35 on the solenoid 6 side and is mold-coupled to the coil assembly 36 and to the solenoid housing 37, for example, to be hermetically fitted. An end plate 38 is embedded in the synthetic resin mold sealing body 16 with the outer peripheral portion of the end plate 38 exposed.
[0041]
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.
[0042]
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.
[0043]
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.
[0044]
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.
[0045]
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.
[0046]
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.
[0047]
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.
[0048]
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.
[0049]
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. .
[0050]
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. It is possible to avoid the occurrence of damage to the third seal member 40 as much as possible.
[0051]
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.
[0052]
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.
[0053]
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.
[0054]
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.
[0055]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is unnecessary to separately provide a member for forming the valve seat, and the number of parts is reduced, and the coil assembly, the end plate, and the valve seat are integrally assembled. This makes it possible to reduce assembly man-hours and contribute to cost reduction. Moreover, 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.
[0056]
According to the second aspect of the present invention, the coupler can be positioned and disposed at a predetermined position of the solenoid housing, and the circumferential displacement of the coil sealing portion in the solenoid housing can be prevented.
[0057]
According to invention of Claim 3, the member for exclusive use for guiding a return spring can be made unnecessary.
[0058]
According to invention of Claim 4, the intensity | strength of a 1st and 2nd partition wall can be maintained, avoiding that the distribution | circulation resistance of a fluid becomes large.
[0059]
According to the fifth aspect of the present invention, by inserting and fixing the valve seat forming portion in which the first and second seal members are mounted in advance and assembled in the valve housing, the valve chamber and the fluid chamber are interposed between them. Thus, it can be formed in the valve housing while maintaining the sealing performance with the outside of the fluid chamber and the outside of the fluid chamber.
[0060]
According to invention of Claim 6, the inside of a mold sealing body can be sealed between the exterior, reducing the axial direction length of a solenoid as much as possible.
[0061]
According to the seventh aspect of the present invention, the number of parts can be reduced by configuring the valve housing with one member, and an increase in assembly man-hour when the valve housing is configured with a plurality of parts can be avoided.
[0062]
According to the eighth aspect of the present invention, it is possible to reduce the force required when the valve seat forming portion is inserted into the valve housing to improve the assembling property and to prevent the first seal member from being damaged as much as possible. it can.
[0063]
According to the ninth aspect of the present invention, it is possible to improve the assembling property by reducing the force required to cover the solenoid housing on the coil sealing portion, and to prevent the third seal member from being damaged as much as possible. it can.
[0064]
According to the tenth aspect of the present invention, it is possible to easily form a stepped portion for engaging the end plate and the main portion of the housing in the solenoid housing while eliminating the need for troublesome processing such as cutting, thereby reducing the cost. Can be planned.
[0065]
According to invention of Claim 11, the distance between a 2nd seal member and an end plate can be set small cooperation, and the axial direction length of a valve apparatus can be shortened as much as possible.
[0066]
Furthermore, according to the invention of claim 12, the movable core can be stably guided.
[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 ... Housing main part
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 ... 1st partition wall
17b ... 2nd partition wall
17c ... Supporting wall
18 ... Coil sealing part
19: First seal member
20: Second seal member
21 ... Fluid chamber
23 ... Guide tube
29 ... Return spring
32 ... movable core
33 ... Fixed core
34 ... Bobbin
35 ... Coil
36 ... Coil assembly
37 ... Solenoid housing
37a: Small diameter hole
37b ... Large diameter hole
37c ... Folding part
37d: fitting cylinder
38 ... End plate
38a ... disk part
38b ... cylindrical part
38c ... buttocks
39 ... Guide color
40: Third seal member
42 ... annular gap
43 ... Step
44 ... Terminal
45 ... Coupler
46 ... opening

Claims (12)

弁ハウジング(7)と、弁ハウジング(7)内に形成される弁室(11)に臨むとともに弁孔(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前記弁室(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、前記弁孔(12)を軸方向移動可能に貫通して前記弁体(14)に連設される弁軸(15)とを有する開閉弁(5)と;前記弁軸(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)とを有するソレノイド(6)と;で構成される弁装置において、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、前記コイル(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前記ソレノイドハウジング(37)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、前記エンドプレート(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ることを特徴とする弁装置。A valve seat facing the valve housing (7) and a valve chamber (11) formed in the valve housing (7) and having a valve hole (12) opened in the center thereof and fixedly arranged in the valve housing (7) (13) and a spring on the side that opens the valve hole (12) while being seated in the valve seat (13) and capable of closing the valve hole (12) and housed in the valve chamber (11). On-off valve (5) having a valve body (14) to be urged and a valve shaft (15) that penetrates the valve hole (12) so as to be axially movable and is 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) formed by winding a coil (35) around a bobbin (34) surrounding the coil; A magnetic metal solenoid housing (37) which is formed in a bottomed cylindrical shape covering the assembly (36) and is magnetically coupled to the fixed core (33) and to the valve housing (7); 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) ( 6) and a valve housing (7) , a valve chamber (11) is formed between the valve housing (7) and fitted into the valve housing (7), and the valve hole (12) and the valve hole A first partition wall (17a) provided with an annular valve seat (13) surrounding an open end of the valve chamber (11) side of (12), and a fluid chamber (21) always communicating with the valve hole (12). With the first partition wall (17a) A valve seat forming portion (17) integrally formed with a second partition wall (17b) fitted to the valve housing (7) and covering the coil (35) to the coil assembly (36). The end plate (38) is joined to a synthetic resin mold sealing body (16) in which a coil sealing portion (18) fitted to the solenoid housing (37) is integrally connected. Is embedded with the outer peripheral portion of the end plate (38) exposed. 前記コイル封止部(18)には、前記コイル(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)に設けられることを特徴とする請求項1記載の弁装置。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 1, characterized in that 46) is provided in the solenoid housing (37). 前記弁座形成部(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)間に縮設されることを特徴とする請求項1記載の弁装置。The second partition wall (17b) of the valve seat forming portion (17) has a cylindrical shape that coaxially surrounds the valve shaft (15) so that the valve shaft (15) can move in the axial direction. A guide cylinder (23) is integrally provided, and a coil-shaped return spring (29) surrounds the guide cylinder (23) and the valve shaft (15), and the second partition wall (17b) and the valve body (14). The valve device according to claim 1, wherein the valve device is disposed between the valve devices. 前記弁座形成部(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支持壁(17c)を介して連結されて成ることを特徴とする請求項1記載の弁装置。In the valve seat forming portion (17), a plurality of circumferential positions of the first and second partition walls (17a, 17b) are connected via a support wall (17c) that allows fluid to flow between them. The valve device according to claim 1, wherein the valve device is formed. 前記弁座形成部(17)における第1および第2仕切り壁(17a,17b)の外周に、弁ハウジング(7)の内周に弾発的に接触する環状の第1および第2シール部材(19,20)がそれぞれ装着されることを特徴とする請求項1記載の弁装置。Annular first and second seal members that elastically contact the inner periphery of the valve housing (7) on the outer periphery of the first and second partition walls (17a, 17b) in the valve seat forming part (17). 19. The valve device according to claim 1, wherein 19, 19) are respectively mounted. 前記コイル封止部(18)の外周に、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)が装着されることを特徴とする請求項5記載の弁装置。The annular third seal member (40) that elastically contacts the inner periphery of the solenoid housing (37) is attached to the outer periphery of the coil sealing portion (18). Valve device. 前記弁ハウジング(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ることを特徴とする請求項1記載の弁装置。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). The valve device according to claim 1, wherein the valve device is integrally molded. 前記ハウジング主部(8)は、外周に環状の第1シール部材(19)が装着される第1仕切り壁(17a)を嵌合せしめる第1孔部(8a)と、外周に環状の第2シール部材(20)が装着される第2仕切り壁(17b)を嵌合させるようにして第1孔部(8a)よりも大径に形成される第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ことを特徴とする請求項7記載の弁装置。The housing main portion (8) includes a first hole (8a) for fitting a first partition wall (17a) to which an annular first seal member (19) is attached on the outer periphery, and an annular second on the outer periphery. A second hole (8b) formed to have a larger diameter than the first hole (8a) so as to fit the second partition wall (17b) to which the seal member (20) is mounted; The valve device according to claim 7, wherein the valve device is formed so as to increase in diameter stepwise toward the opening end side. 前記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ことを特徴とする請求項6記載の弁装置。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. The valve device according to claim 6, wherein the valve device is formed. 前記弁ハウジング(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、前記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ことを特徴とする請求項9記載の弁装置。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). 10. The valve device according to claim 9, wherein the valve device is engaged. . 前記エンドプレート(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)の外周に装着されることを特徴とする請求項5記載の弁装置。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). ) That surrounds a part of the cylindrical portion, and a flange portion that protrudes 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 seal member (20) 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. The valve device according to claim 5. 前記ボビン(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、固定されることを特徴とする請求項1記載の弁装置。A guide collar (39) made of a non-magnetic material, which is formed in a cylindrical shape by slidably fitting a movable core (32), is inserted into and fixed to the bobbin (34). 1. The valve device according to 1.
JP2002032511A 2002-02-08 2002-02-08 Valve device Expired - Fee Related JP4036434B2 (en)

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