JP3845348B2 - Brake device for vehicle - Google Patents

Brake device for vehicle Download PDF

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Publication number
JP3845348B2
JP3845348B2 JP2002257296A JP2002257296A JP3845348B2 JP 3845348 B2 JP3845348 B2 JP 3845348B2 JP 2002257296 A JP2002257296 A JP 2002257296A JP 2002257296 A JP2002257296 A JP 2002257296A JP 3845348 B2 JP3845348 B2 JP 3845348B2
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Japan
Prior art keywords
press
brake fluid
hydraulic pressure
solenoid valves
orifice
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Expired - Fee Related
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JP2002257296A
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Japanese (ja)
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JP2004090842A (en
Inventor
和博 野田
了治 山崎
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Nissin Kogyo Co Ltd
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Nissin Kogyo Co Ltd
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Priority to JP2002257296A priority Critical patent/JP3845348B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、車輪ブレーキから排出されるブレーキ液を貯留するリザーバと、該リザーバから汲み上げたブレーキ液をマスタシリンダ側に戻すポンプと、該ポンプの吐出ブレーキ液を絞るオリフィスと、該オリフィスを介して前記ポンプに接続される機器とを少なくとも備えてマスタシリンダおよび車輪ブレーキ間に介在するブレーキ液圧制御装置が、前記オリフィスを圧入するようにして金属製の基体に配設される車両用ブレーキ装置に関する。
【0002】
【従来の技術】
従来、かかる車両用ブレーキ装置は、たとえば特許文献1等で既に知られている。
【0003】
【特許文献1】
特開平7−267064号公報
【0004】
【発明が解決しようとする課題】
ところが、上記従来のものでは、フレアパイプと一体に形成されるオリフィスがポンプから吐出されるブレーキ液の流れ方向と反対側から基体に圧入されており、ポンプの吐出圧に対抗してオリフィスの位置を維持するために、オリフィスの圧入強度を比較的大きく設定する必要があり、圧入面積、圧入径および締め代等を大きく設定する必要があることからオリフィス周辺が大型化している。
【0005】
本発明は、かかる事情に鑑みてなされたものであり、オリフィスの圧入強度を比較的低く設定可能として、オリフィス周辺の小型化を可能とした車両用ブレーキ装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために、本発明は、車輪ブレーキから排出されるブレーキ液を貯留するリザーバと、該リザーバから汲み上げたブレーキ液をマスタシリンダ側に戻すポンプと、該ポンプの吐出ブレーキ液を絞るオリフィスと、該オリフィスを介して前記ポンプに接続される機器とを少なくとも備えてマスタシリンダおよび車輪ブレーキ間に介在するブレーキ液圧制御装置が、前記オリフィスを圧入するようにして金属製の基体に配設される車両用ブレーキ装置において、前記機器を装着する有底の装着穴が前記基体に設けられ、前記ポンプの吐出部に通じて前記装着穴と交差する圧入孔部と、環状の段部を前記圧入孔部との間に形成して前記圧入孔部よりも小径に形成される通路孔部とを同軸に有する液圧路が、前記装着穴よりも小径に形成されて前記基体に設けられ、前記ポンプからのブレーキ液の流れ方向に沿う前記オリフィスの下流端を前記段部に当接させ得るようにして前記オリフィスが前記流れ方向と同一方向から前記圧入孔部に圧入され、前記段部に当接した状態にある前記オリフィスが前記圧入孔部から前記装着穴側に抜けることを回避すべく前記圧入孔部の軸線が前記装着穴よりも外方に配置されることを特徴とする。
【0007】
このような構成によれば、オリフィスの圧入強度を比較的小さく設定してもポンプの吐出圧によってオリフィスが基体から抜け出てしまうことを防止することができ、オリフィスの圧入強度を比較的低く設定することでオリフィス周辺の小型化を図ることができる。またポンプの吐出圧が作用するのに応じてオリフィスが最初の圧入位置からずれたとしても液圧路の途中の段部に接触するまでしかオリフィスの移動は許容されておらず、段部に接触した状態でオリフィスが装着穴内に抜け落ちることはないので、最初の圧入位置からずれたオリフィスが他の通路に悪影響を及ぼすことはない。
【0009】
【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。
【0010】
図1〜図5は本発明の一実施例を示すものであり、図1は車両用ブレーキ装置の液圧回路図、図2はブレーキ液圧制御装置の基体への取付け状態を示す縦断側面図であって図3の2−2線に沿う断面図、図3は図2の3矢視図、図4は図2の4矢視方向から見た一部切欠き正面図、図5は図2の5−5線拡大断面図である。
【0011】
先ず図1において、タンデム型のマスタシリンダMは、車両運転者がブレーキペダルPに加える踏力に応じたブレーキ液圧を発生する第1および第2出力ポート1A,1Bを備えており、左前輪用車輪ブレーキ2A、右後輪用車輪ブレーキ2B、右前輪用車輪ブレーキ2Cおよび左後輪用車輪ブレーキ2Dと、前記第1および第2出力ポート1A,1Bに個別に接続された第1および第2出力液圧路3A,3Bとの間に、ブレーキ液圧制御装置4が設けられる。
【0012】
ブレーキ液圧制御装置4は、第1出力液圧路3Aに対応した液圧路20Aならびに左前輪用車輪ブレーキ2Aおよび右後輪用車輪ブレーキ2B間にそれぞれ設けられる常開型電磁弁6A,6Bと、第2出力液圧路3Bに対応した液圧路20Bならびに右前輪用車輪ブレーキ2Cおよび左後輪用車輪ブレーキ2D間にそれぞれ設けられる常開型電磁弁6C,6Dと、液圧路20A,20B側へのブレーキ液の流通を許容するようにして前記常開型電磁弁6A〜6Dに並列に接続されるチェック弁7A,7B,7C,7Dと、第1および第2出力液圧路3A,3Bにそれぞれ個別に対応した第1および第2リザーバ8A,8Bと、第1リザーバ8Aならびに左前輪用車輪ブレーキ2Aおよび右後輪用車輪ブレーキ2B間にそれぞれ設けられる常閉型電磁弁9A,9Bと、第2リザーバ8Bならびに右前輪用車輪ブレーキ2Cおよび左後輪用車輪ブレーキ2D間にそれぞれ設けられる常閉型電磁弁9C,9Dと、第1および第2リザーバ8A,8Bに吸入部が接続されるとともに吐出部が液圧路20A,20Bに接続される第1および第2ポンプ10A,10Bと、両ポンプ10A,10Bを駆動する共通1個の電動モータ11と、第1および第2出力液圧路3A,3Bならびに第1および第2ポンプ10A,10Bの吸入部間にそれぞれ介設される常閉型電磁弁12A,12Bと、第1および第2ポンプ10A,10Bの吐出部および前記液圧路20A,20B間にそれぞれ介設される第1および第2ダンパ13A,13Bと、第1および第2ポンプ10A,10Bならびに第1および第2ダンパ13A,13B間にそれぞれ設けられる第1および第2オリフィス14A,14Bと、各ポンプ10A,10B側へのブレーキ液の流通を許容するようにして第1および第2ポンプ10A,10Bならびに第1および第2リザーバ8A,8B間に介設されるチェック弁15A,15Bと、第2出力液圧路3Bに取付けられる圧力センサ16と、第1および第2出力液圧路3A,3Bならびに液圧路20A,20B間にそれぞれ設けられるレギュレータ21A,21Bとを備える。
【0013】
常閉型電磁弁12A,12Bは、第1および第2ポンプ10A,10Bならびにチェック弁15A,15B間と、液圧路20A,20Bとの間にそれぞれ設けられる。
【0014】
レギュレータ21A,21Bは、第1および第2出力液圧路3A,3Bならびに液圧路20A,20B間に、常開型電磁弁5A,5Bと、一方向弁18A,18Bと、リリーフ弁19A,19Bとが並列に接続されて成るものである。
【0015】
一方向弁18A,18Bは、第1および第2出力液圧路3A,3B側からだけのブレーキ液の流通を許容するようにして常開型電磁弁5A,5Bに並列に接続される。またリリーフ弁19A,19Bは、液圧路20A,20Bの液圧が所定値以上になるのに応じて開弁するようにして常開型電磁弁5A,5Bに並列に接続される。
【0016】
このようなレギュレータ21A,21Bは、マスタシリンダMに通じる第1および第2出力液圧路3A,3Bおよび液圧路20A,20B間を常時は連通するものの、常閉型電磁弁12A,12Bの開弁時には出力液圧路3A,3Bおよび前記液圧路20A,20B間を遮断しつつ液圧路20A,20Bの液圧が設定値以上となるのに応じて前記液圧路20A,20Bの液圧をマスタシリンダM側に逃がすように作動し、それにより液圧路20A,20Bの液圧を設定値以下に調整する。
【0017】
また圧力センサ16は、マスタシリンダMから液圧が出力されているか否か、すなわちブレーキペダルPが踏まれているか否かを検出するものであり、上記車両の横滑り制御およびトラクション制御や、マスタシリンダMの出力液圧に応じた電動モータ11の回転数制御等に用いられる。
【0018】
ところで、上記ブレーキ液圧制御装置4において、各車輪がロックを生じる可能性のない通常ブレーキ時には、常開型電磁弁5A,5Bを消磁、開弁するとともに常閉型電磁弁12A,12Bを消磁、閉弁した状態で、各常開型電磁弁6A〜6Dが消磁、開弁状態とされるとともに各常閉型電磁弁9A〜9Dが消磁、閉弁状態とされる。これによりマスタシリンダMおよび車輪ブレーキ2A〜2D間が連通されるとともに車輪ブレーキ2A〜2Dおよびリザーバ8A,8B間が遮断される。したがってマスタシリンダMの第1出力ポート1Aから出力されるブレーキ液圧は常開型電磁弁5Aおよび常開型電磁弁6A,6Bを介して左前輪および右後輪用車輪ブレーキ2A,2Bに作用する。またマスタシリンダMの第2出力ポート1Bから出力されるブレーキ液圧は、常開型電磁弁5Bおよび常開型電磁弁6C,6Dを介して右前輪用および左後輪用車輪ブレーキ2C,2Dに作用する。
【0019】
上記ブレーキ中に車輪がロック状態に入りそうになったときに、常開型電磁弁6A〜6Dのうちロック状態に入りそうになった車輪に対応する常開型電磁弁が励磁、閉弁されるとともに、常閉型電磁弁9A〜9Dのうち上記車輪に対応する常閉型電磁弁が励磁、開弁される。これによりロック状態に入りそうになった車輪に対応する部分でマスタシリンダMおよび車輪ブレーキ2A〜2D間が遮断されるとともに車輪ブレーキ2A〜2Dおよびリザーバ8A,8B間が連通される。したがってロック状態に入りそうになった車輪のブレーキ液圧の一部が第1リザーバ8Aまたは第2リザーバ8Bに吸収され、ロック状態に入りそうになった車輪のブレーキ液圧が減圧されることになる。
【0020】
またブレーキ液圧を一定に保持する際には、常開型電磁弁6A〜6Dが励磁、閉弁されるとともに、常閉型電磁弁9A〜9Dが消磁、閉弁され、これにより車輪ブレーキ2A〜2DがマスタシリンダMおよびリザーバ8A,8Bから遮断される。
【0021】
さらにブレーキ液圧を増圧する際には、常開型電磁弁6A〜6Dが消磁、開弁状態とされるともに、常閉型電磁弁9A〜9Dが消磁、閉弁状態とされ、これによりマスタシリンダMおよび車輪ブレーキ2A〜2D間が連通されるとともに車輪ブレーキ2A〜2Dおよびリザーバ8A,8B間が遮断される。
【0022】
このように常開型電磁弁5A,5Bを消磁、開弁するとともに常閉型電磁弁12A,12Bを消磁、閉弁した状態で、各常開型電磁弁6A〜6Dおよび各常閉型電磁弁9A〜9Dの消磁・励磁を制御することにより、車輪をロックさせることなく、効率良く制動することができる。
【0023】
ところで、上述のようなアンチロックブレーキ制御中に、電動モータ11は回転作動し、この電動モータ11の作動に伴って第1および第2ポンプ10A,10Bが駆動されるので、第1および第2リザーバ8A,8Bに吸収されたブレーキ液は、第1および第2ポンプ10A,10Bに吸入され、次いで第1および第2ダンパ13A,13Bを経て第1および第2出力液圧路3A,3Bに還流される。このようなブレーキ液の還流によって、第1および第2リザーバ8A,8Bのブレーキ液の吸収によるブレーキペダルPの踏み込み量の増加を防ぐことができる。しかも第1および第2ポンプ10A,10Bの吐出圧の脈動は第1および第2ダンパ13A,13Bならびに第1および第2オリフィス14A,14Bの働きにより抑制され、上記還流によってブレーキペダルPの操作フィーリングが阻害されることはない。
【0024】
またブレーキ液圧制御装置4は、上述のアンチロックブレーキ制御に加えて、非ブレーキ操作状態での車両の横滑り制御やトラクション制御を行なうことができる。
【0025】
而してたとえば横滑り制御時には、レギュレータ21A,21Bの常開型電磁弁5A,5Bが励磁、閉弁されるとともに常閉型電磁弁12A,12Bが励磁、開弁され、さらに電動モータ11の作動により第1および第2ポンプ10A,10Bが駆動され、各常開型電磁弁6A〜6Dのうち制動したい車輪に対応する常開型電磁弁以外の常開型電磁弁が励磁、閉弁される。
【0026】
これにより両ポンプ10A,10Bは、マスタシリンダMのブレーキ液を第1および第2出力ポート1A,1Bから第1および第2出力液圧路3A,3B、常閉型電磁弁12A,12Bを介して吸入し、各車輪ブレーキ2A〜2Dのうち選択された車輪ブレーキに、常開型電磁弁6A〜6Dのうち開弁している常開型電磁弁を介してブレーキ液を供給し、ブレーキ液がマスタシリンダM側に逆流することは、常開型電磁弁5A,5Bが閉弁していることによって阻止される。
【0027】
このような横滑り制御やトラクション制御時に、第1および第2ポンプ10A,10Bからの吐出液圧が作用する液圧路20A,20Bの液圧が設定値以上となると、レギュレータ21A,21Bのリリーフ弁19A,19Bにより、過剰油圧分がマスタシリンダM側に逃がされることになり、ブレーキ圧が作用している車輪ブレーキに過剰の液圧が作用することが回避される。
【0028】
しかも液圧路20A,20Bおよびオリフィス14A,14B間にダンパ13A,13Bが介設されているので、レギュレータ21A,21Bの作動によって液圧路20A,20Bに生じる脈動をダンパ13A,13Bで吸収することができ、レギュレータ21A,21Bの作動による脈動に起因した作動音の発生を抑えることができる。
【0029】
図2〜図4において、ブレーキ液圧制御装置4は、たとえばアルミニウム合金等の金属によりブロック状に形成される基体22に設けられるものであり、ブレーキ液圧制御装置4が設けられた基体22は図示しない車体に取付けられる。
【0030】
チェック弁7A〜7Dを内蔵した常開型電磁弁6A〜6Dおよび各常閉型電磁弁9A〜9Dは、それらのソレノイド部23…,24…を基体22の一面22aから突出するようにしてそれぞれ一列に並んで基体22に取付けられる。また一方向弁18A,18Bおよびリリーフ弁19A,19Bと協働してレギュレータ21A,21Bを構成するようにして一方向弁18A,18Bおよびリリーフ弁19A,19Bを内蔵した常開型電磁弁5A,5Bが、前記常開型電磁弁6A,6Dを常閉型電磁弁9A,9Dとの間に挟む位置で、それらのソレノイド部25…を前記一面22aから突出するようにして基体22に取付けられる。さらに図示はしないが、常閉型電磁弁12A,12Bがそれらのソレノイド部を前記一面22aから突出しつつ前記常開型電磁弁5A,5B間で基体22に取付けられる。
【0031】
前記常開型電磁弁5Aを常開型電磁弁6Aとの間に挟む位置で前記一面22aに開口する有底の嵌合穴26が基体22に設けられ、該嵌合穴26には、一部を前記一面22aから突出させるとともに嵌合穴26の閉塞端との間に液圧室27を形成するようにして圧力センサ16が液密に嵌合される。しかも嵌合穴26の閉塞端および圧力センサ16間にはコイルばね28が設けられ、コイルばね28による弾発力によって圧力センサ16が嵌合穴26から離脱するのを阻止するための止め輪29が圧力センサ16に軸方向外方側から係合するようにして嵌合穴26の開口端部内面に装着される。
【0032】
第1および第2ダンパ13A,13Bは、常開型電磁弁6A〜6Dの軸線に直交するようにして基体22の左右両側面にそれぞれ開口するようにして基体22に同軸に設けられる有底のダンパ穴30…と、該ダンパ穴30…との間にダンパ室31…を形成してダンパ穴30…の開口端に液密に嵌合される蓋部材32…と、該蓋部材32…のダンパ穴30…からの抜け出しを阻止するようにしてダンパ穴30…の開口端に装着される止め輪33…とで構成される。
【0033】
而して第1ダンパ13Aのダンパ室31には常開型電磁弁6A,6Bが接続され、第2ダンパ13Bのダンパ室31には常開型電磁弁6C,6Dが接続される。
【0034】
第1および第2ポンプ10A,10Bは、圧力センサ16にほぼ対応した位置で常開型電磁弁6A〜6Dの配列方向に沿う同軸の作動軸線を有して基体22に配設されるものであり、両ポンプ10A,10Bが備えるプランジャ34…は、基体22における他面22bの中央部に設けられた凹部35に一端を臨ませるようにして相互に間隔をあけた位置に配置される。また両ポンプ10A,10Bには吸入弁36…および吐出弁37…がそれぞれ内蔵されている。
【0035】
電動モータ11は、その出力軸38を前記凹部35に突入させるようにして前記基体22の他面22bに取付けられ、前記出力軸38には、前記両ポンプ10A,10Bが備えるプランジャ34…の先端に摺接するボールベアリング39が、出力軸38とは偏心して装着される。而して電動モータ11の作動によって出力軸38が回転すると、ボールベアリング39に偏心運動が与えられ、それにより両ポンプ10A,10Bのプランジャ34…が往復駆動される。
【0036】
基体22の前記他面22b寄りの部分には、基体22の下面からの穿孔加工により形成される一対の通路40…が、一対ずつの常閉型電磁弁9A,9B;9C,9Dに接続されるようにして設けられ、各通路40…の前記基体22の下面への開口端はボール41…を圧入することで液密に閉じられる。
【0037】
第1および第2リザーバ8A,8Bは、前記一面22a寄りで基体22に設けられており、前記通路40…が第1および第2リザーバ8A,8Bに連通される。また第1および第2ポンプ10A,10Bの吸入部42…に通じる一対の吸入路43…が基体22の下面からの穿孔加工により前記通路40…と平行にして基体22に設けられており、各吸入路43…の前記基体22の下面への開口端はボール44…を圧入することで液密に閉じられ、吸入路43…の途中は、図示はしないが第1および第2チェック弁15A,15Bを介して第1および第2リザーバ8A,8Bに接続される。
【0038】
第1および第2ポンプ10A,10Bの吐出部45…にそれぞれ通じる液圧路20A,20Bは、前記通路40…および吸入路43…と平行にして基体22に設けられるものであり、第1および第2ダンパ13A,13Bのダンパ室31…に内端を通じさせるようにして基体22の下面から穿孔加工され、各液圧路20A,20Bの前記基体22の下面への開口端はボール46…を圧入することで液密に閉じられる。
【0039】
すなわち各液圧路20A,20Bは、第1および第2ポンプ10A,10Bを横切るようにして基体22に設けられている。またブレーキ液圧制御装置4の一部を構成する機器である常開型電磁弁5A,5Bを装着すべく、基体22の一面22aに開口する有底の装着穴47…が、第1および第2ポンプ10A,10Bと、第1および第2ダンパ13A,13Bとの間で基体22に液圧路20A,20Bよりも大径にして設けられており、前記液圧路20A,20Bは各装着穴47…の閉塞端寄りの部分と交差するようにして基体22に設けられる。
【0040】
しかも液圧路20A,20Bにおいて、第1および第2ポンプ10A,10Bと装着穴47…との間には、第1および第2ポンプ10A,10Bの吐出部45…からのブレーキ液の流れ方向48と同一方向で第1および第2オリフィス14A,14Bが圧入される。
【0041】
図5を併せて参照して、前記液圧路20A,20Bは、前記オリフィス14A,14Bを挿入可能とした挿入孔部49…と、前記オリフィス14A,14Bが圧入されるようにして挿入孔部49…よりも小径に形成される圧入孔部50…と、環状の段部52…を前記圧入孔部50…との間に形成して圧入孔部50…よりも小径に形成される通路孔部51…とが同軸に連なって成るものであり、挿入孔部49…は、基体22の下面から第1および第2ポンプ10A,10Bまでの間に形成され、圧入孔部50…は、第1および第2ポンプ10A,10Bから装着穴47…までの間に形成され、通路孔部51…は装着孔47…から第1および第2ダンパ13A,13Bのダンパ室31…までの間に形成される。
【0042】
前記段部52…は、圧入孔部50…に圧入されたオリフィス14A,14Bがその圧入位置から前記流れ方向に沿う下流側に移動したときに、オリフィス14A,14Bの流れ方向48に沿う下流端を当接させ得るものであり、液圧路20A,20Bは、前記段部52…に当接した状態にあるオリフィス14A,14Bが圧入孔部50…から装着穴47…側に抜けることを回避する位置で装着穴47…と交差するように形成される。
【0043】
而してこの実施例では、圧入孔部50…の軸線が装着穴47…より外方に配置されることで、段部52…に当接した状態にあるオリフィス14A,14Bが圧入孔部50…から装着穴47…側に抜けることを回避するようにしている。
【0044】
ところで、オリフィス14A,14Bの外周には部分的に大径となる圧入シール部53…が設けられており、この圧入シール部53…が圧入孔部50…に圧入されるのであるが、図5の鎖線で示すようにオリフィス14A,14Bが段部52…に当接したときに前記圧入シール部53…の全周が圧入孔部50…の内周に全周にわたって密接した状態にあるときには、通路孔部51…の装着孔47…への連通がオリフィス14A,14Bで遮断されることがないように段部52…の位置が設定される。またオリフィス14A,14Bが段部52…に当接したときに通路孔部51…の装着孔47…への連通がオリフィス14A,14Bで遮断される場合には、前記圧入シール部53…の一部と圧入孔部50…の内周の一部との密接状態が解除され、装着孔47…を第1および第2ポンプ10A,10Bの吐出部45…に通じさせる微少通路が圧入孔部50…の内周およびオリフィス14A,14B間に形成されるように、第1および第2オリフィス14A,14Bにおける圧入シール部53…の位置が設定される。
【0045】
基体22の一面22aには、横断面長方形状の筒形に形成される第1樹脂成形体55の一端に、第1樹脂成形体55の一端開口部を塞ぐ第2樹脂成形体56が振動溶着されて成るカバー57が締結される。このカバー57は、常開型電磁弁6A〜6Dのソレノイド部23…、常閉型電磁弁9A〜9Dのソレノイド部24…、常開型電磁弁5A,5Bのソレノイド部25…および常閉型電磁弁12A,12Bのソレノイド部を収納するとともに、第1および第2リザーバ8A,8Bの一部、ならびに圧力センサ16の一部を収納する収納室58を基体22との間に形成するようにして、基体22の一面22aに締結されている。しかもカバー57の基体22側端縁には、該基体22の一面22aに弾発的に接触する無端状のシール部材59が装着される。
【0046】
カバー57における第1樹脂成形体55内の中間部には、常開型電磁弁6A〜6Dのソレノイド部23…、常閉型電磁弁9A〜9Dのソレノイド部24…、常開型電磁弁5A,5Bのソレノイド部25…および常閉型型電磁弁12A,12Bのソレノイド部にそれぞれ個別に対応した矩形状の開口部60…,61…,62…を有する平面状の壁部63が、基体22の一面22aに対向するようにして一体に形成される。
【0047】
前記各ソレノイド部23…,24…,25…の先端部は前記開口部60…,61…,62…に挿入され、各ソレノイド部23…,24…,25…から一対ずつ突出される電磁弁側接続端子64…,65…,66…が、各開口部60…,61…,62…内を延びるようにして突出される。
【0048】
前記壁部63には、常開型電磁弁6A〜6D、常閉型電磁弁9A〜9D、常開型電磁弁5A,5Bおよび常閉型電磁弁12A,12Bにそれぞれ個別に対応した導電金属製の個別バスバー(図示せず)と、それらの電磁弁6A〜6D,9A〜9D,5A,5B,12A,12Bに共通に対応する単一の導電金属製の共通バスバー(図示せず)とが埋設される。
【0049】
前記電磁弁側接続端子64…,65…,66…の一方には、各個別バスバーの一端に形成される個別バスバー側接続端子67…,68…,69…がそれぞれ電気的に接続され、前記電磁弁側接続端子64…,65…,66…の他方には、前記共通バスバーに形成される複数の共通バスバー側接続端子(図示せず)がそれぞれ電気的に接続される。
【0050】
圧力センサ16からは3本の圧力センサ側接続端子70…が突出される。一方、カバー57の壁部63には、前記圧力センサ16に対応した開口部71が設けられており、前記圧力センサ側接続端子70…は開口部71内を延びるようにして圧力センサ16から突出される。しかも壁部63には、圧力センサ16に対応した導電金属製の3本のバスバー72…が埋設されており、各バスバー72…の一端に形成されるバスバー側接続端子73…が圧力センサ側接続端子70…にそれぞれ電気的に接続される。
【0051】
カバー57の第2樹脂成形体56および壁部63間でカバー57内には、電気回路が設けられる制御基板74が配置されており、該制御基板74は、前記壁部63に突設された複数の支持ボス部75…上に固定的に支持される。
【0052】
而して常開型電磁弁6A〜6D、常閉型電磁弁9A〜9D、常開型電磁弁5A,5Bおよび常閉型電磁弁12A,12Bに対応した個別バスバーおよび共通バスバーは、制御基板74上の電気回路に電気的に接続される。また圧力センサ16に対応したバスバー72…の他端は、制御基板74を貫通するようにして該制御基板74上の電気回路に電気的に接続される。
【0053】
カバー57にはカプラ部76が基体22から側方にはみだすようにして一体に形成されており、前記制御基板74に連なる複数の接続端子77…がカプラ部76内に配置される。
【0054】
次にこの実施例の作用について説明すると、第1および第2ポンプ10A,10Bの吐出ブレーキ液を絞るオリフィス14A,14Bが、第1および第2ポンプ10A,10Bの吐出部45…に通じて基体22に設けられる液圧路20A,20Bに、第1および第2ポンプ10A,10Bからのブレーキ液の流れ方向48と同一方向で圧入されている。
【0055】
このため、オリフィス14A,14Bの基体22への圧入強度を比較的小さく設定しても第1および第2ポンプ10A,10Bの吐出圧によってオリフィス14A,14Bが基体から抜け出てしまうことを防止することができ、オリフィス14A,14Bの圧入強度を比較的低く設定することでオリフィス14A,14B周辺の小型化を図ることができる。
【0056】
またオリフィス14A,14Bを介して第1および第2ポンプ10A,10Bに接続されるようにしてブレーキ液圧制御装置4の一部を構成する常開型電磁弁5A,5Bが、液圧路20A,20Bよりも大径にして基体22に設けられる有底の装着穴47…に装着されており、液圧路20A,20Bが、オリフィス14A,14Bが圧入される圧入孔部50…と、オリフィス14A,14Bの前記流れ方向48…に沿う下流端を当接させる環状の段部52…を圧入孔部50…との間に形成して圧入孔部50…よりも小径に形成される通路孔部51…とを有して基体22に設けられ、しかも段部52…に当接した状態にあるオリフィス14A,14Bが圧入孔部50…から装着穴47…側に抜けることを回避する位置で装着穴47…と交差するように液圧路20A,20Bが形成される。
【0057】
したがって第1および第2ポンプ10A,10Bの吐出圧が作用するのに応じてオリフィス14A,14Bが最初の圧入位置からずれたとしても液圧路20A,20Bの途中の段部52…に接触するまでしかオリフィス14A,14Bの移動は許容されておらず、段部52…に接触した状態でオリフィス14A,14Bが装着穴47…内に抜け落ちることはないので、最初の圧入位置からずれたオリフィス14A,14Bが他の通路に悪影響を及ぼすことはない。
【0058】
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。
【0059】
【発明の効果】
以上のように発明によれば、オリフィスの圧入強度を比較的小さく設定してもポンプの吐出圧によってオリフィスが基体から抜け出てしまうことを防止することができ、オリフィスの圧入強度を比較的低く設定することでオリフィス周辺の小型化を図ることができる。またポンプの吐出圧が作用するのに応じてオリフィスが最初の圧入位置からずれたとしても液圧路の途中の段部に接触するまでしかオリフィスの移動は許容されておらず、段部に接触した状態でオリフィスが装着穴内に抜け落ちることはないので、最初の圧入位置からずれたオリフィスが他の通路に悪影響を及ぼすことはない。
【図面の簡単な説明】
【図1】車両用ブレーキ装置の液圧回路図である。
【図2】ブレーキ液圧制御装置の基体への取付け状態を示す縦断側面図であって図3の2−2線に沿う断面図である。
【図3】図2の3矢視図である。
【図4】図2の4矢視方向から見た一部切欠き正面図である。
【図5】図2の5−5線拡大断面図である。
【符号の説明】
2A,2B,2C,2D・・・車輪ブレーキ
4・・・ブレーキ液圧制御装置
5A,5B・・・機器としての常開型電磁弁
8A,8B・・・リザーバ
10A,10B・・・ポンプ
14A,14B・・・オリフィス
20A,20B・・・液圧路
22・・・基体
45・・・吐出部
47・・・装着穴
48・・・流れ方向
50・・・圧入孔部
51・・・通路孔部
52・・・段部
M・・・マスタシリンダ
[0001]
BACKGROUND OF THE INVENTION
The present invention includes a reservoir for storing brake fluid discharged from a wheel brake, a pump for returning brake fluid pumped from the reservoir to the master cylinder side, an orifice for restricting the discharge brake fluid of the pump, and via the orifice A brake fluid pressure control device that includes at least a device connected to the pump and is interposed between a master cylinder and a wheel brake is related to a vehicle brake device that is disposed on a metal base body so as to press-fit the orifice. .
[0002]
[Prior art]
Conventionally, such a brake device for a vehicle is already known, for example, from Patent Document 1 and the like.
[0003]
[Patent Document 1]
JP-A-7-267064 [0004]
[Problems to be solved by the invention]
However, in the above conventional one, the orifice formed integrally with the flare pipe is pressed into the base from the opposite side of the flow direction of the brake fluid discharged from the pump, and the position of the orifice is opposed to the pump discharge pressure. In order to maintain the above, it is necessary to set the press-fitting strength of the orifice to be relatively large, and it is necessary to set the press-fitting area, the press-fitted diameter, the tightening margin, and the like, so that the periphery of the orifice is enlarged.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular brake device that allows the press-fit strength of the orifice to be set to be relatively low and allows the size of the periphery of the orifice to be reduced.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a reservoir for storing brake fluid discharged from a wheel brake, a pump for returning brake fluid pumped from the reservoir to the master cylinder side, and restricting a discharge brake fluid of the pump. A brake fluid pressure control device that includes at least an orifice and a device connected to the pump via the orifice and is interposed between the master cylinder and the wheel brake is disposed on the metal base body so as to press-fit the orifice. In the vehicle brake device to be installed, a bottomed mounting hole for mounting the device is provided in the base, a press-fitting hole portion that passes through the discharge portion of the pump and intersects the mounting hole, and an annular stepped portion. A hydraulic pressure passage that is coaxially formed between the press-fitting hole portion and formed coaxially with a passage hole portion that has a smaller diameter than the press-fitting hole portion has a smaller diameter than the mounting hole. The orifice is formed on the base body so that the downstream end of the orifice along the flow direction of the brake fluid from the pump can be brought into contact with the stepped portion. The axis of the press-fitting hole is arranged outward from the mounting hole so as to avoid the orifice that is press-fitted into the part and in contact with the stepped part from the press-fitting hole to the mounting hole. It is characterized by being.
[0007]
According to such a configuration, it is possible to prevent the orifice will exits from the substrate by the discharge pressure of the pump be set relatively small press-fit strength of the orifice, a relatively low setting the press-fit strength of the orifice By doing so, the size of the periphery of the orifice can be reduced. In addition, even if the orifice deviates from the initial press-fitting position according to the pump discharge pressure, the orifice is allowed to move only until it contacts the step in the middle of the hydraulic pressure path. In this state, the orifice does not fall into the mounting hole, so that the orifice displaced from the initial press-fitting position does not adversely affect other passages.
[0009]
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.
[0010]
FIGS. 1 to 5 show an embodiment of the present invention, FIG. 1 is a hydraulic circuit diagram of a vehicle brake device, and FIG. 2 is a longitudinal side view showing an attachment state of the brake hydraulic pressure control device to a base. 3 is a cross-sectional view taken along line 2-2 in FIG. 3, FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2, FIG. 4 is a partially cutaway front view seen from the direction of arrow 4 in FIG. FIG. 5 is an enlarged sectional view taken along line 5-5.
[0011]
First, in FIG. 1, a tandem master cylinder M is provided with first and second output ports 1A and 1B for generating brake fluid pressure in accordance with a pedaling force applied to a brake pedal P by a vehicle driver. Wheel brake 2A, right rear wheel wheel brake 2B, right front wheel wheel brake 2C and left rear wheel wheel brake 2D, and first and second individually connected to the first and second output ports 1A and 1B, respectively. A brake fluid pressure control device 4 is provided between the output fluid pressure paths 3A and 3B.
[0012]
The brake hydraulic pressure control device 4 includes normally open solenoid valves 6A and 6B provided between the hydraulic pressure path 20A corresponding to the first output hydraulic pressure path 3A and the left front wheel brake 2A and the right rear wheel brake 2B. And the hydraulic pressure path 20B corresponding to the second output hydraulic pressure path 3B, the normally open electromagnetic valves 6C and 6D provided between the right front wheel brake 2C and the left rear wheel brake 2D, respectively, and the hydraulic pressure path 20A , 20B side check valves 7A, 7B, 7C, 7D connected in parallel to the normally open solenoid valves 6A-6D so as to allow the brake fluid to flow, and first and second output hydraulic pressure paths The first and second reservoirs 8A, 8B individually corresponding to 3A, 3B, and the normally closed provided between the first reservoir 8A and the left front wheel brake 2A and the right rear wheel brake 2B, respectively. The normally closed solenoid valves 9C and 9D, and the first and second reservoirs 8A and 8B provided between the solenoid valves 9A and 9B, the second reservoir 8B, the right front wheel brake 2C and the left rear wheel brake 2D, respectively. The first and second pumps 10A, 10B, the suction part of which is connected to the hydraulic pressure passages 20A, 20B, the common electric motor 11 for driving both pumps 10A, 10B, Normally closed solenoid valves 12A and 12B interposed between the suction portions of the first and second output hydraulic pressure paths 3A and 3B and the first and second pumps 10A and 10B, and the first and second pumps 10A and 10B, respectively. First and second dampers 13A and 13B, first and second pumps 10A and 10B, and first and second hydraulic pressure passages 20A and 20B, respectively. The first and second pumps 10A, 10B and the first and second orifices 14A, 14B provided between the two dampers 13A, 13B, and the first and second pumps 10A, 10B and the first pump 10A, 10B and the first pumps 10A, 10B, respectively. Check valves 15A and 15B interposed between the first and second reservoirs 8A and 8B, a pressure sensor 16 attached to the second output hydraulic pressure path 3B, the first and second output hydraulic pressure paths 3A and 3B, and the liquid Regulators 21A and 21B provided between the pressure paths 20A and 20B, respectively.
[0013]
The normally closed solenoid valves 12A and 12B are provided between the first and second pumps 10A and 10B and the check valves 15A and 15B, and between the hydraulic pressure paths 20A and 20B, respectively.
[0014]
The regulators 21A and 21B include normally-open electromagnetic valves 5A and 5B, one-way valves 18A and 18B, and relief valves 19A, between the first and second output hydraulic pressure paths 3A and 3B and the hydraulic pressure paths 20A and 20B. 19B is connected in parallel.
[0015]
The one-way valves 18A, 18B are connected in parallel to the normally open solenoid valves 5A, 5B so as to allow the brake fluid to flow only from the first and second output hydraulic pressure paths 3A, 3B. The relief valves 19A and 19B are connected in parallel to the normally open solenoid valves 5A and 5B so as to open in response to the hydraulic pressure of the hydraulic pressure paths 20A and 20B becoming a predetermined value or higher.
[0016]
Such regulators 21A and 21B always communicate between the first and second output hydraulic pressure paths 3A and 3B and the hydraulic pressure paths 20A and 20B communicating with the master cylinder M, but the normally closed solenoid valves 12A and 12B. When the valve is opened, the output hydraulic pressure paths 3A, 3B and the hydraulic pressure paths 20A, 20B are shut off, and the hydraulic pressure paths 20A, 20B become higher than a set value in response to the hydraulic pressure of the hydraulic pressure paths 20A, 20B exceeding the set value. It operates so as to release the hydraulic pressure to the master cylinder M side, thereby adjusting the hydraulic pressure in the hydraulic pressure paths 20A and 20B to a set value or less.
[0017]
The pressure sensor 16 detects whether or not the hydraulic pressure is being output from the master cylinder M, that is, whether or not the brake pedal P is being depressed. This is used for controlling the rotational speed of the electric motor 11 according to the output hydraulic pressure of M.
[0018]
By the way, in the brake fluid pressure control device 4, during normal braking in which each wheel is not likely to be locked, the normally open solenoid valves 5A and 5B are demagnetized and opened, and the normally closed solenoid valves 12A and 12B are demagnetized. In the closed state, the normally open solenoid valves 6A to 6D are demagnetized and opened, and the normally closed solenoid valves 9A to 9D are demagnetized and closed. As a result, the master cylinder M and the wheel brakes 2A to 2D communicate with each other and the wheel brakes 2A to 2D and the reservoirs 8A and 8B are disconnected. Accordingly, the brake hydraulic pressure output from the first output port 1A of the master cylinder M acts on the left front wheel brakes and the right rear wheel brakes 2A and 2B via the normally open solenoid valve 5A and the normally open solenoid valves 6A and 6B. To do. The brake fluid pressure output from the second output port 1B of the master cylinder M is the right front wheel brakes 2C, 2D via the normally open solenoid valve 5B and the normally open solenoid valves 6C, 6D. Act on.
[0019]
When the wheel is about to enter the locked state during the brake, the normally open type electromagnetic valve corresponding to the wheel that is about to enter the locked state among the normally open type electromagnetic valves 6A to 6D is excited and closed. In addition, among the normally closed solenoid valves 9A to 9D, the normally closed solenoid valves corresponding to the wheels are excited and opened. As a result, the master cylinder M and the wheel brakes 2A to 2D are disconnected at the portion corresponding to the wheel that is about to enter the locked state, and the wheel brakes 2A to 2D and the reservoirs 8A and 8B are communicated. Therefore, a part of the brake fluid pressure of the wheel that is about to enter the locked state is absorbed by the first reservoir 8A or the second reservoir 8B, and the brake fluid pressure of the wheel that is about to enter the locked state is reduced. Become.
[0020]
When the brake fluid pressure is kept constant, the normally open solenoid valves 6A to 6D are excited and closed, and the normally closed solenoid valves 9A to 9D are demagnetized and closed, whereby the wheel brake 2A. ˜2D is disconnected from the master cylinder M and the reservoirs 8A and 8B.
[0021]
Further, when the brake fluid pressure is increased, the normally open solenoid valves 6A to 6D are demagnetized and opened, and the normally closed solenoid valves 9A to 9D are demagnetized and closed. The cylinder M and the wheel brakes 2A to 2D communicate with each other and the wheel brakes 2A to 2D and the reservoirs 8A and 8B are disconnected.
[0022]
In this manner, the normally open solenoid valves 5A and 5B are demagnetized and opened, and the normally closed solenoid valves 12A and 12B are demagnetized and closed, and the normally open solenoid valves 6A to 6D and the normally closed solenoid valves are closed. By controlling the demagnetization / excitation of the valves 9A to 9D, braking can be performed efficiently without locking the wheels.
[0023]
By the way, during the antilock brake control as described above, the electric motor 11 is rotated, and the first and second pumps 10A and 10B are driven in accordance with the operation of the electric motor 11. Therefore, the first and second pumps are driven. The brake fluid absorbed in the reservoirs 8A and 8B is sucked into the first and second pumps 10A and 10B, and then passes through the first and second dampers 13A and 13B to the first and second output hydraulic pressure paths 3A and 3B. Refluxed. Such recirculation of the brake fluid can prevent an increase in the amount of depression of the brake pedal P due to the absorption of the brake fluid in the first and second reservoirs 8A and 8B. In addition, the pulsation of the discharge pressures of the first and second pumps 10A and 10B is suppressed by the action of the first and second dampers 13A and 13B and the first and second orifices 14A and 14B. The ring is not disturbed.
[0024]
The brake fluid pressure control device 4 can perform side slip control and traction control of the vehicle in a non-brake operation state in addition to the above-described antilock brake control.
[0025]
Thus, for example, during side slip control, the normally open solenoid valves 5A and 5B of the regulators 21A and 21B are excited and closed, and the normally closed solenoid valves 12A and 12B are excited and opened, and the operation of the electric motor 11 is further performed. Thus, the first and second pumps 10A and 10B are driven, and the normally open solenoid valves other than the normally open solenoid valve corresponding to the wheel to be braked among the normally open solenoid valves 6A to 6D are excited and closed. .
[0026]
As a result, both pumps 10A, 10B allow the brake fluid of the master cylinder M to flow from the first and second output ports 1A, 1B to the first and second output hydraulic pressure paths 3A, 3B and the normally closed solenoid valves 12A, 12B. The brake fluid is supplied to the selected wheel brake of the wheel brakes 2A to 2D via the normally open solenoid valve that is open among the normally open solenoid valves 6A to 6D. Is prevented from flowing back to the master cylinder M side because the normally open solenoid valves 5A and 5B are closed.
[0027]
When the hydraulic pressure in the hydraulic pressure passages 20A and 20B on which the discharge hydraulic pressure from the first and second pumps 10A and 10B acts during such side slip control and traction control becomes a set value or more, the relief valves of the regulators 21A and 21B 19A and 19B allow excess hydraulic pressure to escape to the master cylinder M side, so that excessive hydraulic pressure is prevented from acting on the wheel brake on which the brake pressure is applied.
[0028]
Moreover, since the dampers 13A and 13B are interposed between the hydraulic pressure paths 20A and 20B and the orifices 14A and 14B, pulsations generated in the hydraulic pressure paths 20A and 20B due to the operation of the regulators 21A and 21B are absorbed by the dampers 13A and 13B. Therefore, it is possible to suppress the generation of the operation sound due to the pulsation caused by the operation of the regulators 21A and 21B.
[0029]
2 to 4, the brake fluid pressure control device 4 is provided on a base 22 formed in a block shape with a metal such as an aluminum alloy, for example, and the base 22 provided with the brake fluid pressure control device 4 is It is attached to a vehicle body (not shown).
[0030]
The normally open solenoid valves 6A to 6D and the normally closed solenoid valves 9A to 9D each incorporating the check valves 7A to 7D are respectively configured such that their solenoid portions 23... 24 protrude from the one surface 22a of the base 22. Attached to the base 22 in a line. Further, the normally open solenoid valve 5A having the one-way valve 18A, 18B and the relief valve 19A, 19B built therein so as to constitute the regulator 21A, 21B in cooperation with the one-way valve 18A, 18B and the relief valve 19A, 19B. 5B is attached to the base 22 in such a way that the normally-open solenoid valves 6A and 6D are sandwiched between the normally-closed solenoid valves 9A and 9D so that their solenoid portions 25 project from the one surface 22a. . Although not shown, normally closed solenoid valves 12A and 12B are attached to the base 22 between the normally open solenoid valves 5A and 5B while projecting their solenoid parts from the one surface 22a.
[0031]
A bottomed fitting hole 26 opening on the one surface 22a is provided in the base 22 at a position sandwiching the normally open solenoid valve 5A with the normally open solenoid valve 6A. The pressure sensor 16 is fluid-tightly fitted so that the fluid pressure chamber 27 is formed between the portion protruding from the one surface 22 a and the closed end of the fitting hole 26. In addition, a coil spring 28 is provided between the closed end of the fitting hole 26 and the pressure sensor 16, and a retaining ring 29 for preventing the pressure sensor 16 from being detached from the fitting hole 26 due to the elastic force of the coil spring 28. Is attached to the inner surface of the opening end of the fitting hole 26 so as to engage with the pressure sensor 16 from the axially outer side.
[0032]
The first and second dampers 13A and 13B are bottomed and provided coaxially with the base 22 so as to open on both the left and right sides of the base 22 so as to be orthogonal to the axis of the normally open solenoid valves 6A to 6D. Between the damper hole 30 and the damper hole 30, a damper chamber 31 is formed, and the lid member 32 is liquid-tightly fitted to the opening end of the damper hole 30, and the lid member 32. It comprises a retaining ring 33 attached to the opening end of the damper hole 30 so as to prevent the damper hole 30 from coming out.
[0033]
Thus, the normally open solenoid valves 6A and 6B are connected to the damper chamber 31 of the first damper 13A, and the normally open solenoid valves 6C and 6D are connected to the damper chamber 31 of the second damper 13B.
[0034]
The first and second pumps 10 </ b> A and 10 </ b> B are disposed on the base body 22 with coaxial operating axes along the arrangement direction of the normally open solenoid valves 6 </ b> A to 6 </ b> D at positions substantially corresponding to the pressure sensor 16. The plungers 34 provided in both pumps 10A, 10B are arranged at positions spaced from each other so that one end faces the recess 35 provided in the central portion of the other surface 22b of the base 22. Both pumps 10A and 10B have intake valves 36 and discharge valves 37, respectively.
[0035]
The electric motor 11 is attached to the other surface 22b of the base 22 so that its output shaft 38 enters the recess 35, and the output shaft 38 has tips of plungers 34... Provided in the two pumps 10A, 10B. A ball bearing 39 that is in sliding contact with the output shaft 38 is mounted eccentrically. Thus, when the output shaft 38 is rotated by the operation of the electric motor 11, an eccentric motion is given to the ball bearing 39, whereby the plungers 34 of the both pumps 10A, 10B are driven to reciprocate.
[0036]
A pair of passages 40 formed by drilling from the lower surface of the base 22 are connected to the pair of normally closed electromagnetic valves 9A, 9B; 9C, 9D at a portion near the other surface 22b of the base 22. The opening ends of the passages 40 to the lower surface of the base 22 are closed in a liquid-tight manner by press-fitting balls 41.
[0037]
The first and second reservoirs 8A and 8B are provided in the base 22 close to the one surface 22a, and the passages 40 are communicated with the first and second reservoirs 8A and 8B. A pair of suction passages 43 communicated with the suction portions 42 of the first and second pumps 10A and 10B are provided in the base body 22 in parallel with the passages 40 by drilling from the lower surface of the base body 22. The opening end of the suction passage 43... To the lower surface of the base body 22 is liquid-tightly closed by press-fitting a ball 44..., While not shown, the first and second check valves 15 A,. It is connected to the first and second reservoirs 8A and 8B via 15B.
[0038]
The hydraulic pressure passages 20A and 20B communicating with the discharge portions 45 of the first and second pumps 10A and 10B are provided in the base 22 in parallel with the passages 40 and the suction passages 43, respectively. The inner end is passed through the damper chambers 31 of the second dampers 13A, 13B so that the inner end is perforated from the lower surface of the base 22, and the open ends of the hydraulic paths 20A, 20B to the lower surface of the base 22 are formed with balls 46. Closed liquid-tight by press-fitting.
[0039]
That is, each of the hydraulic pressure paths 20A and 20B is provided in the base 22 so as to cross the first and second pumps 10A and 10B. Further, in order to mount normally open solenoid valves 5A and 5B which are devices constituting a part of the brake fluid pressure control device 4, a bottomed mounting hole 47 which opens on one surface 22a of the base 22 is provided with a first and a first. The two pumps 10A, 10B and the first and second dampers 13A, 13B are provided in the base 22 with a larger diameter than the hydraulic pressure paths 20A, 20B. It is provided in the base 22 so as to intersect with the portion of the hole 47.
[0040]
Moreover, in the hydraulic pressure paths 20A and 20B, the flow direction of the brake fluid from the discharge portions 45 of the first and second pumps 10A and 10B is between the first and second pumps 10A and 10B and the mounting holes 47. The first and second orifices 14 </ b> A and 14 </ b> B are press-fitted in the same direction as 48.
[0041]
Referring also to FIG. 5, the hydraulic pressure paths 20A and 20B include an insertion hole portion 49 through which the orifices 14A and 14B can be inserted, and an insertion hole portion so that the orifices 14A and 14B are press-fitted. 49 is formed between the press-fitting hole portion 50 having a smaller diameter than that of the press-fitting hole portion 50... And the passage hole formed to have a smaller diameter than the press-fitting hole portion 50. The insertion holes 49 are formed between the bottom surface of the base 22 and the first and second pumps 10A and 10B, and the press-fitting holes 50 Are formed between the first and second pumps 10A, 10B and the mounting holes 47, and the passage holes 51 are formed between the mounting holes 47 and the damper chambers 31 of the first and second dampers 13A, 13B. Is done.
[0042]
The step portions 52 are downstream ends along the flow direction 48 of the orifices 14A and 14B when the orifices 14A and 14B press-fitted into the press-fit holes 50 move from the press-fit position to the downstream side along the flow direction. The hydraulic pressure paths 20A, 20B avoid the orifices 14A, 14B in contact with the stepped portions 52 ... from coming out of the press-fit holes 50 ... to the mounting holes 47 ... side. It is formed so as to intersect with the mounting holes 47 at a position where
[0043]
Therefore, in this embodiment, the orifices 14A and 14B in contact with the stepped portions 52 are arranged so that the press-fitting hole portions 50 are in contact with the stepped portions 52. ... so as to avoid slipping off from the mounting hole 47 side.
[0044]
Incidentally, press-fitting seal portions 53, which are partially large in diameter, are provided on the outer circumferences of the orifices 14A, 14B. The press-fit seal portions 53 are press-fitted into the press-fitting hole portions 50, but FIG. When the orifices 14A and 14B come into contact with the stepped portions 52 as shown by chain lines, the entire circumference of the press-fit seal portions 53 is in close contact with the inner circumference of the press-fit holes 50. The positions of the step portions 52 are set so that the passages of the passage holes 51 to the mounting holes 47 are not blocked by the orifices 14A and 14B. Further, when the orifices 14A, 14B are in contact with the stepped portions 52, the communication of the passage holes 51 with the mounting holes 47 is blocked by the orifices 14A, 14B, one of the press-fit seal portions 53 ... The press-fit hole 50 has a small passage that allows the mounting hole 47 to communicate with the discharge parts 45 of the first and second pumps 10A and 10B. The positions of the press-fit seal portions 53 in the first and second orifices 14A and 14B are set so as to be formed between the inner circumference of the... And the orifices 14A and 14B.
[0045]
On one surface 22 a of the base 22, a second resin molded body 56 that closes one end opening of the first resin molded body 55 is vibration welded to one end of the first resin molded body 55 formed in a cylindrical shape having a rectangular cross section. The cover 57 thus formed is fastened. This cover 57 includes solenoid portions 23 of the normally open solenoid valves 6A to 6D, solenoid portions 24 of the normally closed solenoid valves 9A to 9D, solenoid portions 25 of the normally open solenoid valves 5A and 5B, and a normally closed type. While accommodating the solenoid parts of the solenoid valves 12A and 12B, a storage chamber 58 for storing a part of the first and second reservoirs 8A and 8B and a part of the pressure sensor 16 is formed between the base member 22 and the base member 22. The base 22 is fastened to one surface 22a. Moreover, an endless seal member 59 that elastically contacts the one surface 22a of the base 22 is attached to the edge of the cover 57 on the base 22 side.
[0046]
In the middle part of the first resin molding 55 in the cover 57, the solenoid parts 23 of the normally open solenoid valves 6A to 6D, the solenoid parts 24 of the normally closed solenoid valves 9A to 9D, the normally open solenoid valve 5A. , 5B solenoid part 25... And normally closed solenoid valves 12A, 12B respectively have rectangular openings 60... 61. 22 is formed integrally so as to face one surface 22a.
[0047]
Solenoid valves 23, 24, 25, and so on are inserted into the openings 60, 61, 62, and protrude one by one from the solenoid parts 23, 24, 25, respectively. The side connection terminals 64... 65... 66 protrude so as to extend through the openings 60.
[0048]
The wall 63 has conductive metals corresponding to the normally open solenoid valves 6A to 6D, the normally closed solenoid valves 9A to 9D, the normally open solenoid valves 5A and 5B, and the normally closed solenoid valves 12A and 12B, respectively. Individual bus bars (not shown) made of a single conductive metal corresponding to the solenoid valves 6A to 6D, 9A to 9D, 5A, 5B, 12A and 12B in common (not shown) Is buried.
[0049]
One of the solenoid valve side connection terminals 64, 65, 66, is electrically connected to an individual bus bar side connection terminal 67, 68, 69, formed at one end of each individual bus bar. A plurality of common bus bar side connection terminals (not shown) formed on the common bus bar are electrically connected to the other of the solenoid valve side connection terminals 64...
[0050]
Three pressure sensor side connection terminals 70 are projected from the pressure sensor 16. On the other hand, an opening 71 corresponding to the pressure sensor 16 is provided in the wall portion 63 of the cover 57, and the pressure sensor side connection terminals 70 are projected from the pressure sensor 16 so as to extend in the opening 71. Is done. In addition, three conductive metal bus bars 72 corresponding to the pressure sensor 16 are embedded in the wall 63, and the bus bar side connection terminals 73 formed at one end of each bus bar 72 are connected to the pressure sensor side. Electrically connected to terminals 70.
[0051]
A control board 74 provided with an electric circuit is disposed in the cover 57 between the second resin molded body 56 of the cover 57 and the wall part 63, and the control board 74 protrudes from the wall part 63. It is fixedly supported on the plurality of support boss portions 75.
[0052]
Thus, the individual bus bar and the common bus bar corresponding to the normally open solenoid valves 6A to 6D, the normally closed solenoid valves 9A to 9D, the normally open solenoid valves 5A and 5B, and the normally closed solenoid valves 12A and 12B are the control board. 74 is electrically connected to the electrical circuit on 74. The other ends of the bus bars 72 corresponding to the pressure sensor 16 are electrically connected to an electric circuit on the control board 74 so as to penetrate the control board 74.
[0053]
A coupler portion 76 is integrally formed on the cover 57 so as to protrude laterally from the base 22, and a plurality of connection terminals 77 connected to the control board 74 are arranged in the coupler portion 76.
[0054]
Next, the operation of this embodiment will be described. Orifices 14A and 14B for restricting the discharge brake fluid of the first and second pumps 10A and 10B are connected to the discharge portions 45 of the first and second pumps 10A and 10B. 22 is press-fitted into the hydraulic pressure paths 20A, 20B in the same direction as the flow direction 48 of the brake fluid from the first and second pumps 10A, 10B.
[0055]
For this reason, even if the press-fit strength of the orifices 14A and 14B to the base 22 is set to be relatively small, the orifices 14A and 14B are prevented from coming out of the base due to the discharge pressures of the first and second pumps 10A and 10B. It is possible to reduce the size around the orifices 14A and 14B by setting the press-fitting strength of the orifices 14A and 14B to be relatively low.
[0056]
Further, normally-open electromagnetic valves 5A and 5B that constitute a part of the brake hydraulic pressure control device 4 so as to be connected to the first and second pumps 10A and 10B via the orifices 14A and 14B are provided as hydraulic pressure paths 20A. , 20B having a diameter larger than that of the bottomed mounting hole 47 provided in the base 22, and the hydraulic pressure paths 20A, 20B are press-fitting holes 50 into which the orifices 14A, 14B are press-fitted, and the orifices. 14A and 14B are formed with annular stepped portions 52 that abut the downstream ends along the flow direction 48 with the press-fit holes 50, and are formed with smaller diameters than the press-fit holes 50. Are provided on the base body 22 and have positions where the orifices 14A and 14B in contact with the stepped portions 52 are prevented from coming off from the press-fit holes 50 to the mounting holes 47. Intersects mounting holes 47 ... Uni fluid pressure line 20A, 20B are formed.
[0057]
Therefore, even if the orifices 14A and 14B are deviated from the initial press-fitting positions in accordance with the discharge pressures of the first and second pumps 10A and 10B, they contact with the step portions 52 in the middle of the hydraulic pressure paths 20A and 20B. The movement of the orifices 14A and 14B is allowed only until the orifices 14A and 14B come out into the mounting holes 47 in contact with the stepped portions 52, so that the orifice 14A deviated from the initial press-fitting position. , 14B does not adversely affect other passages.
[0058]
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.
[0059]
【The invention's effect】
As described above, according to the present invention, even if the press-fit strength of the orifice is set to be relatively small, it is possible to prevent the orifice from coming out of the base body due to the discharge pressure of the pump, and the press-fit strength of the orifice is relatively low. By setting, it is possible to reduce the size around the orifice. In addition, even if the orifice deviates from the initial press-fitting position according to the pump discharge pressure, the orifice is allowed to move only until it contacts the step in the middle of the hydraulic pressure path. In this state, the orifice does not fall into the mounting hole, so that the orifice displaced from the initial press-fitting position does not adversely affect other passages.
[Brief description of the drawings]
FIG. 1 is a hydraulic circuit diagram of a vehicle brake device.
2 is a longitudinal side view showing a state in which the brake fluid pressure control device is attached to a base body, and is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2;
4 is a partially cutaway front view seen from the direction of arrow 4 in FIG.
5 is an enlarged cross-sectional view taken along line 5-5 of FIG.
[Explanation of symbols]
2A, 2B, 2C, 2D ... wheel brake 4 ... brake hydraulic pressure control devices 5A, 5B ... normally open solenoid valves 8A, 8B as devices ... reservoirs 10A, 10B ... pump 14A , 14B ... Orifice 20A, 20B ... Hydraulic pressure path 22 ... Base body 45 ... Discharge part 47 ... Mounting hole 48 ... Flow direction 50 ... Press-fit hole part 51 ... Passage Hole 52 ... Step M ... Master cylinder

Claims (1)

車輪ブレーキ(2A,2B,2C,2D)から排出されるブレーキ液を貯留するリザーバ(8A,8B)と、該リザーバ(8A,8B)から汲み上げたブレーキ液をマスタシリンダ(M)側に戻すポンプ(10A,10B)と、該ポンプ(10A,10B)の吐出ブレーキ液を絞るオリフィス(14A,14B)と、該オリフィス(14A,14B)を介して前記ポンプ(10A,10B)に接続される機器(5A,5B)とを少なくとも備えてマスタシリンダ(M)および車輪ブレーキ(2A,2B,2C,2D)間に介在するブレーキ液圧制御装置(4)が、前記オリフィス(14A,14B)を圧入するようにして金属製の基体(22)に配設される車両用ブレーキ装置において、前記機器(5A,5B)を装着する有底の装着穴(47)が前記基体(22)に設けられ、前記ポンプ(10A,10B)の吐出部(45)に通じて前記装着穴(47)と交差する圧入孔部(50)と、環状の段部(52)を前記圧入孔部(50)との間に形成して前記圧入孔部(50)よりも小径に形成される通路孔部(51)とを同軸に有する液圧路(20A,20B)が、前記装着穴(47)よりも小径に形成されて前記基体(22)に設けられ、前記ポンプ(10A,10B)からのブレーキ液の流れ方向(48)に沿う前記オリフィス(14A,14B)の下流端を前記段部(52)に当接させ得るようにして前記オリフィス(14A,14B)が前記流れ方向(48)と同一方向から前記圧入孔部(50)に圧入され、前記段部(52)に当接した状態にある前記オリフィス(14A,14B)が前記圧入孔部(50)から前記装着穴(47)側に抜けることを回避すべく前記圧入孔部(50)の軸線が前記装着穴(47)よりも外方に配置されることを特徴とする車両用ブレーキ装置。 A reservoir (8A, 8B) for storing brake fluid discharged from the wheel brakes (2A, 2B, 2C, 2D), and a pump for returning the brake fluid pumped from the reservoir (8A, 8B) to the master cylinder (M) side (10A, 10B), orifices (14A, 14B) for restricting the discharge brake fluid of the pumps (10A, 10B), and devices connected to the pumps (10A, 10B) via the orifices (14A, 14B) (5A, 5B) and a brake fluid pressure control device (4) interposed between the master cylinder (M) and the wheel brakes (2A, 2B, 2C, 2D) press-fits the orifices (14A, 14B) the vehicle brake system disposed on a metal substrate (22) so as to, the device (5A, 5B) mounted blind bore for mounting the (4 ) Is provided in the base body (22), communicates with the discharge part (45) of the pump (10A, 10B) and intersects the mounting hole (47), and an annular step part (52). ) Are formed between the press-fitting hole portion (50) and a passage hole portion (51) formed coaxially with a passage hole portion (51) having a smaller diameter than the press-fitting hole portion (50). The orifice (14A, 14B) is formed in a smaller diameter than the mounting hole (47) and is provided on the base body (22), along the flow direction (48) of the brake fluid from the pump (10A, 10B). The orifice (14A, 14B) is press-fitted into the press-fitting hole (50) from the same direction as the flow direction (48) so that the downstream end can be brought into contact with the step (52), and the step ( 52) in contact with the orifice (14) Are located outside of the axis is the mounting hole of the press-fitting holes in order to avoid 14B) comes off the mounting hole (47) side from the press-fitting hole (50) (50) (47) vehicle brake equipment, characterized in that.
JP2002257296A 2002-09-03 2002-09-03 Brake device for vehicle Expired - Fee Related JP3845348B2 (en)

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JP4506327B2 (en) * 2004-07-22 2010-07-21 株式会社アドヴィックス Brake hydraulic pressure control device for vehicle and manufacturing method thereof
JP4760595B2 (en) * 2006-07-27 2011-08-31 株式会社アドヴィックス Brake hydraulic pressure control device
JP6759580B2 (en) * 2015-12-24 2020-09-23 株式会社アドヴィックス Hydraulic braking device
JP2017165194A (en) * 2016-03-15 2017-09-21 株式会社アドヴィックス Liquid pressure brake equipment
JP7056396B2 (en) 2018-06-14 2022-04-19 株式会社アドヴィックス Brake device

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