JP2004074837A - Hydraulic fluid reservoir - Google Patents

Hydraulic fluid reservoir Download PDF

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Publication number
JP2004074837A
JP2004074837A JP2002234194A JP2002234194A JP2004074837A JP 2004074837 A JP2004074837 A JP 2004074837A JP 2002234194 A JP2002234194 A JP 2002234194A JP 2002234194 A JP2002234194 A JP 2002234194A JP 2004074837 A JP2004074837 A JP 2004074837A
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Prior art keywords
reservoir
reservoir body
hydraulic fluid
master cylinder
opening
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JP2002234194A
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Japanese (ja)
Inventor
Noriyuki Imanishi
今西 紀之
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Bosch Corp
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Bosch Automotive Systems Corp
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Priority to JP2002234194A priority Critical patent/JP2004074837A/en
Publication of JP2004074837A publication Critical patent/JP2004074837A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic fluid reservoir longitudinally projecting from an upper part of a master cylinder to give greater design freedom to a reservoir body 22. <P>SOLUTION: The reservoir body 22 includes nipples 31, 32 at a bottom of a down half 22d, and an opening 26 for lubrication at an upper end of an upper half 22u. A part of the half having the opening 26 projects from a cylinder body. A reservoir supporting member 40 is so arranged at the bottom of the down half 22d to be closer to the opening 26 than the nipple 32 is. A fluid level sensor having a float guide member 60 and a reed switch housing 56 is arranged at a position on which the reservoir supporting member 40 is located in the length direction of the reservoir body 22. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は、車両のマスタシリンダ(ブレ−キ用のものだけでなく、クラッチ用のものをも含む)に作動液を供給するための作動液リザ−バの技術に関し、特に、マスタシリンダの上部に載るリザ−バ本体の長さが大きく、その一部がマスタシリンダの上部から長さ方向に突き出る構成のものに関する。
【0002】
【発明の背景】
一般に、車両のマスタシリンダにおいては、安全を確保するため、リザ−バ本体の内部の作動液量を検出するための液面検出手段が必須である。この液面検出手段は、作動液の量に応じて(つまりは、作動液の液面高さの変動に応じて)リザ−バ本体の内部を上下方向に移動するフロ−トを含む。そのような液面検出手段について、今までは、フロ−トをリザ−バ本体のほぼ中央部、特に、リザ−バ本体とマスタシリンダとの結合部の直上に配置することが通例であった。たとえば、リザ−バ本体の上部をキリンの首のように伸ばし、注油のための開口をその上方の一端に設けたもの(たとえば、特開2001−55131号)では、下方のリザ−バ本体の中央に液面検出手段を配置している。これは、車両用であるために、リザ−バ本体の内部の作動液が波立つことは避けえず、その波立ちの影響をできるだけ回避しようとする設計思想からである。
【0003】
一方、マスタシリンダの上部に載る作動液リザ−バにおいては、リザ−バ本体の長さが大きく、その一部がマスタシリンダの上部から長さ方向に突き出る構成のものが出ている(たとえば、実公平8−2006号、あるいは特開2002−67923号)。設置場所であるエンジンル−ム内のレイアウトの制約から、リザ−バ本体の幅および高さを小さくしつつ、その長さを大きくすることにより、必要とする作動液量を確保するというねらいからである。このような幅方向の大きさに比べて長さ方向の大きさが大きいリザ−バ本体は、長さ方向の一方の側に、マスタシリンダに作動液を供給するための通路であって、マスタシリンダのボス部に連結するためのニップル、また、リザ−バ本体の他方の側に、リザ−バ本体の内部に注油するための開口をそれぞれ備える。開口を含むリザ−バ本体の部分は、マスタシリンダの一端よりも突き出てマスタシリンダの上部から外れている。それにより、注油のための開口は、多数の部品および装置を収容するエンジンル−ムの中で、作動液を注油しやすい配置となっている。
【0004】
【発明の解決すべき課題】
リザ−バ本体の長さが大きく、その一部がマスタシリンダの上部から長さ方向に突き出る作動液リザ−バは、多数の部品および装置を収容するエンジンル−ムに配置すべき装置として好適である。しかし、そのような新しい構成の作動液リザ−バにおいて、フロ−トを含む液面検出手段の配置に関しては、前記した設計思想、つまり、フロ−トをリザ−バ本体とマスタシリンダとの結合部の直上に配置するという考え方が専ら採られていた。そのため、フロ−トを配置すべきリザ−バ本体の部分(ニップルおよび結合部があるリザ−バ本体の部分)の大きさをさらに小さくすることなどが困難であり、リザ−バ本体を設計する上で制約があった。特に、リザ−バ本体の長さが大きいこの種の作動液リザ−バにおいては、注油のための開口がある側を高い位置に、その反対のニップルのある側を低い位置にそれぞれ配置するので、マスタシリンダの上部に載り、しかも、相対的に低い位置にあるリザ−バ本体の部分を小さく(幅だけでなく、高さも小さく)するという要求があるからである。
【0005】
そこで、この発明は、マスタシリンダの上部から長さ方向に突き出る構成のリザ−バ本体の設計の自由度をさらに高めることができる作動液リザ−バを提供することを目的とする。また、この発明は、長さ方向の大きさが大きいリザ−バ本体に適したフロ−ト押さえ部材を備える作動液リザ−バを提供することを他の目的とする。この発明のさらに具体的な目的は、以下の説明から明らかになるであろう。
【0006】
【発明の解決手段】
この発明では、次のAおよびBに示すとおり、液面検出手段を今までの一般的な配置とは異なる新しい配置にする。
A リザ−バ本体の内部の作動液の量に応じてリザ−バ本体の中を上下方向に移動するフロ−トを含み、リザ−バ本体の内部の作動液量を検出するための液面検出手段が、リザ−バ本体の長さ方向上、ニップルを含むリザ−バ本体の部分と注油のための開口を含むリザ−バ本体の部分との間に位置している。
B リザ−バ本体の長さ方向上、液面検出手段が位置する個所に、リザ−バ本体の底部をマスタシリンダの上部に支持するためのリザ−バ支持部材がある。
【0007】
リザ−バ本体を支持するリザ−バ支持部材それ自体は、公知であり、リザ−バ本体と一体に設けたもの(たとえば、実公平8−2006号)と、リザ−バ本体とは別体に着脱可能に設けたもの(たとえば、特開2002−87240号)とがある。この発明の作動液リザ−バは、リザ−バ支持部材として、それらのいずれの形態のものをも適用することができる。長さ方向の大きさが大きいリザ−バ本体は、車両が揺動するとき、ニップルに隣り合う結合部(つまり、マスタシリンダとリザ−バ本体とを結合する結合部)の個所だけでなく、このリザ−バ支持部材の個所においてもマスタシリンダと一体の動きをするであろう。そのため、それらの個所においては、リザ−バ本体の長手方向の他の個所に比べて、リザ−バ本体の内部の作動液の液面の波立ちの乱れがより小さいことが期待される。すなわち、リザ−バ本体の長手方向上、リザ−バ支持部材のある位置は、マスタシリンダとリザ−バ本体とを結合する結合部のある位置と同様に、液面検出手段を配置すべき格好の個所である。
【0008】
リザ−バ本体は、今までのものと同様、合成樹脂の成形品であり、上側半分と下側半分との二つ割り構造である。リザ−バ本体の下側半分には、その底壁の内側にフロ−トの動きをガイドするガイド部材があるほか、その底壁の外側にリ−ドスイッチを入れるリ−ドスイッチ収容部がある。フロ−トが保持するマグネットの磁力によって、リ−ドスイッチが液面検出信号を出すため、フロ−トガイド部材とリ−ドスイッチ収容部とは、リザ−バ本体の長手方向上、同じ個所に位置することは勿論である。フロ−トガイド部材は、通常、上方が開いた筒形状である。そのため、内部のフロ−トがガイド部材の中から飛び出るのを防止することが必要である。フロ−トの飛び出しを防止するフロ−ト押さえ部材としては、フロ−トガイド部材の上端に設けた爪部材、あるいは、リザ−バ本体の上側半分の内壁に設けた突起などを利用することができるが、最も好ましい形態は、リザ−バ本体の上側半分の内壁に上側半分と一体に設けた特定の板状体である。その板状体は、リザ−バ本体の長さ方向に対してクロスする配置であり、しかも、その少なくとも一側方に、リザ−バ本体の内部の作動液がリザ−バ本体の長さ方向に移動するのを許す通路を作っている。さらに、リザ−バ本体の長さ方向上、板状体の背後であり、注油のための開口により近く、板状体の側方の通路に面する個所に、リザ−バ本体の長さ方向に移動する作動液の流れを遮断する邪魔板を備える。フロ−ト押さえ部材を兼ねる板状体は、邪魔板と相俟って、作動液が注油のための開口の側に移動し、開口の部分から外部に漏れることを防止する。
【0009】
また、リ−ドスイッチ収容部については、リザ−バ本体の長さ方向上、注油のための開口を含む側の前面に、リ−ドスイッチを挿入あるいは取り外すための挿入口を備えるようにすると良い。そうすれば、搭載車両のちがい、たとえば左ハンドル、右ハンドルのちがいがあったとしても、リ−ドスイッチを同一方向に沿ってリ−ドスイッチ収容部に挿入したり、そこから取り外すことができる。
【0010】
多くの場合、この発明はタンデム型のマスタシリンダ用として適用されるが、その場合、マスタシリンダとリザ−バ本体とを結合するための結合部は、2つのニップルの間に位置する。
【0011】
【実施例】
図面は、この発明をタンデム型のブレ−キマスタシリンダ用の作動液リザ−バに適用した例を示し、図1が、ブレ−キマスタシリンダ10に組み付けた形態の作動液リザ−バ20を示している。タンデム型のマスタシリンダ10は、シリンダ本体12の内部にプライマリ、セカンダリの各系の部品を内蔵した細長い液圧発生装置である。このマスタシリンダ10は、取付けフランジ12fをもつ側を車両のダッシュボ−ドに向け、車両に取り付ける。シリンダ本体12の上部には、プライマリ、セカンダリの各系に対応し軸線方向に互いに離れた個所に、2つのボス部14p,14sがある。また、それらのボス部14p,14sの間には、マスタシリンダ10と作動液リザ−バ20とを結合するための結合部16がある。結合部16の主体は、ピン162である。
【0012】
車両に取り付けた状態において、マスタシリンダ10は、取付けフランジ12fのある側から車両の前方に位置する一端に向かって前上がりに傾斜している。作動液リザ−バ20の主体は、幅方向の大きさに比べて長さが大きい合成樹脂製のリザ−バ本体22である。リザ−バ本体22は、上側半分22uと下側半分22dとの二つ割り構造であり、それらの両半分22u,22dは、互いに熱溶着し一体化され、内部に作動液を貯える空間を区画している。長さが大きいリザ−バ本体22は、一端を含む大部分がマスタシリンダ10のシリンダ本体12の上部に載るが、他方の端を含む一部がシリンダ本体12の端から突き出てマスタシリンダ10の上部からはみ出している。注油のための開口26は、このはみ出した側の上部に位置する。前上がりに傾斜したマスタシリンダ10に載った作動液リザ−バ20も前上がりに傾斜し、開口26の部分が最も高くなっている。したがって、開口26を通して行う注油あるいは補給の作業に際し、周囲の部品がほとんど障害にならない。また、キャップ28が被う開口26は、水平であり、その点からも注油あるいは補給の作業が容易である。
【0013】
リザ−バ本体22の下側半分22dの底部の外側には、マスタシリンダ10側のボス部14p,14sに対応する個所に、作動液の供給通路となるニップル31,32があり(断面構造を示す図2を参照)、それらニップル31,32の中間に結合部16のための一対の結合フランジ164がある。作動液リザ−バ20は、リザ−バ本体22の底部の各ニップル31,32をグロメットシ−ルを介してマスタシリンダ10側のボス部14p,14sに入れ、結合部16のピン162によってその支持形態を保つ。また、リザ−バ本体22の下側半分22dの底部の外側には、下側半分22dと一体の一対のリザ−バ支持部材40がある。それらリザ−バ支持部材40は、リザ−バ本体22の長さ方向に見てニップル31,32のある側とは反対側に近い個所、つまり、注油のための開口26のある側に近い個所に位置する。リザ−バ支持部材40の下端は、マスタシリンダ10のシリンダ本体12の上部面に当たり(左右一対の各リザ−バ支持部材40の先端形状が異なるのは、シリンダ本体12の形状に合わせるためである)、車両が揺動するとき、作動液リザ−バ20がマスタシリンダ10と一体に動くように支持する。また、開口26に圧送ホ−スを通して作動液を注油するとき、リザ−バ支持部材40は、作動液リザ−バ20の倒れを有効に防止する。
【0014】
リザ−バ本体22の断面構造を示す図2から分かるように、長さ方向の長さが大きいリザ−バ本体22は、背の低い一端から開口26のある他端に向けて互いに間隔をおいて第1、第2および第3の3つの隔壁51,52,53を備えている。それらの各隔壁は、いずれも上側半分22uがもつ上側隔壁と下側半分22dがもつ下側隔壁とを溶着ラインHのところで一体に熱溶着している。それにより、各隔壁51,52,53は、リザ−バ本体22の機械的強度を補強し、しかもまた、リザ−バ本体22の内部空間を長さ方向の前後に区画する。といっても、各ニップル31,32に隣り合う個所の第1および第3の隔壁51,53は、上側半分22uを下から見た図4が示すように、溶着部分がL字型であり、各ニップル31,32の連通口を取り囲む構成ではあるが、内部空間を前後に遮断するものではない。それに対し、第2の隔壁52は、プライマリ側とセカンダリ側とを区画するため、リザ−バ本体22の幅方向の全域にわたる。この第2の隔壁52が区画する前後の空間を連通するため、上側半分22uの上部内壁に面する部分に角形の連通口522がある。ここで、この第2の隔壁52の連通口522の最も低い位置は、リザ−バ本体22の内部空間に貯えるべき作動液の最小液面高さ位置(図1の中に、「MIN」を付記した液面表示目盛の高さ位置)に対応する。それにより、第2の隔壁52に隣り合うプライマリ、セカンダリの一方の系統に万が一のフェイルが生じたときでも、他方の系統に必要最小限の作動液を確保することができる。なお、連通口522の最も低い位置を定める隔壁52の一辺部分52tは、連通口522に向かうにしたがって薄くなるテ−パとなっている。それは、上側半分22uの成形時の型抜きを容易にするためからである。
【0015】
さて、作動液リザ−バ20は、リザ−バ本体22の内部の作動液量を検出するための液面検出手段を通常とは異なる個所に備えている。その個所は、リザ−バ本体22の長さ方向上、ニップル32のある部分と開口26のある部分との間であり、リザ−バ支持部材40のあるところである。リザ−バ本体40の下側半分22dの底壁の外側であり、一対のリザ−バ支持部材40の間に、リ−ドスイッチを入れるリ−ドスイッチ収容部56がある。リ−ドスイッチ収容部56は、マスタシリンダ10および作動液リザ−バ20の軸線方向(あるいは、リザ−バ本体22の長さ方向)に沿う形状であり、注油のための開口26を含む側の前面に、リ−ドスイッチを挿入あるいは取り外すための挿入口56iをもつ。そのため、長さ方向に対して直交する方向からリ−ドスイッチを挿入したりする場合に比べて、リ−ドスイッチおよびそこから延びる引出し線の取り扱いを容易に行うことができる。また、作動液リザ−バ20にマスタシリンダ10に向かう外力が作用しても、リザ−バ支持部材40の存在により、リ−ドスイッチ収容部56がシリンダ本体12に対して接触し押されることはなく、リ−ドスイッチ収容部56内に組み込まれるリ−ドスイッチに破損を招くような無理な力(負荷)は作用しない。
【0016】
リ−ドスイッチ収容部56のある下側半分22dの内壁上に、円筒形状のフロ−トガイド部材60がある。フロ−トガイド部材60は、その一側面に自らの内外を連通するためのスリット62、また、円筒の内壁の互いに対向する部分に一対のガイド突起64をそれぞれ備えている。このフロ−トガイド部材60は、その内周にフロ−ト(図示しない)を入れ、ガイド突起64によりフロ−トが上下方向に移動することをガイドする。フロ−トは、底部にマグネットを保持しているので、作動液の液量が不足するとき、マグネットの磁力によってリ−ドスイッチ収容部56の中のリ−ドスイッチ(図示しない)を作動し、車両の運転手に警報を発する。
【0017】
作動液リザ−バ20の中の作動液量は、図1の液面表示目盛、すなわち、「MIN」を付記した最小液面高さ位置、「MAX」を付記した最大液面高さ位置から分かるように、フロ−トガイド部材60の高さを越えることになる。そのため、フロ−トがガイド部材60の中から飛び出るのを防止する手立てが必要である。ここでは、フロ−トガイド部材60の直上に位置する上側半分22uの個所に、フロ−ト押さえ部材70を設けるようにしている。フロ−ト押さえ部材70は、上側半分22uと一体の板状体であり、リザ−バ本体22の長さ方向に対してクロスする配置であり、しかも、その少なくとも一側方に、リザ−バ本体22の内部の作動液がリザ−バ本体22の長さ方向に移動するのを許す通路を作っている。フロ−ト押さえ部材70は、リザ−バ本体22の幅あるいは/および長さの方向に1あるいは2〜3個設けることができる。図の例では、フロ−ト押さえ部材70は幅方向に2つ(図4を参照)であり、2つの板状体の真ん中、および左右の合計3か所が液移動のための通路72となっている。フロ−ト押さえ部材70である板状体をリザ−バ本体22の長さ方向に対してクロスさせる理由は、移動する作動液に無用な乱れを生じさせないためである。したがって、板状体については、いたずらに乱れを生じさせない他の形状、たとえば波形やわん曲した形状にすることもできる。
【0018】
フロ−ト押さえ部材70のさらに前方には、注油のための開口26があるので、そこから作動液が漏れるのを防止することが必要である。なぜなら、作動液リザ−バ20の開口26には、キャップ28があるとはいえ、リザ−バ本体22の内部空間を大気圧にするためのスリットがあるので、勢いのある作動液はスリットを通して外部に漏れるおそれがあるからである。このような液漏れを防止するため、フロ−ト押さえ部材70である板状体と開口26との間に、開口26に向かって流れる作動液を遮断する邪魔板74を配置している。この邪魔板74は、特に、ハの字状に配置した2つの板状体の真ん中の通路72からの作動液の流れを確実に遮断するようにしている。なお、邪魔板74も上側半分22uと一体に成形することができる。
【図面の簡単な説明】
【図1】この発明の一実施例を示すもので、マスタシリンダに組み付けた形態を示す側面図である。
【図2】図1の作動液リザ−バの長さ方向に沿う断面図である。
【図3】図2の3−3線に沿う断面図である。
【図4】リザ−バ本体の上側半分を下から見た図である。
【符号の説明】
10 マスタシリンダ
16 結合部
20 作動液リザ−バ
22 リザ−バ本体
22u 上側半分
22d 下側半分
26 注油のための開口
31,32 ニップル
40 リザ−バ支持部材
51,52,53 隔壁
522 連通口
56 リ−ドスイッチ収容部
56i 挿入口
60 フロ−トガイド部材
70 フロ−ト押さえ部材
72 通路
74 邪魔板
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for a hydraulic fluid reservoir for supplying hydraulic fluid to a master cylinder (including not only a brake cylinder but also a clutch cylinder) of a vehicle. In which the length of the reservoir body is large, and a part of the reservoir body protrudes from the upper portion of the master cylinder in the length direction.
[0002]
BACKGROUND OF THE INVENTION
Generally, in a master cylinder of a vehicle, a liquid level detecting means for detecting the amount of hydraulic fluid inside a reservoir body is indispensable to ensure safety. The liquid level detecting means includes a float which moves up and down inside the reservoir body in accordance with the amount of the hydraulic fluid (that is, in response to a change in the liquid level of the hydraulic fluid). Until now, it has been customary for such a liquid level detecting means to arrange the float substantially at the center of the reservoir main body, particularly just above the joint between the reservoir main body and the master cylinder. . For example, in the one in which the upper part of the reservoir body is extended like a giraffe's neck and an opening for lubrication is provided at one upper end thereof (for example, JP-A-2001-55131), The liquid level detecting means is arranged at the center. This is because the hydraulic fluid inside the reservoir body is unavoidable to undulate because it is for a vehicle, and the design philosophy is to avoid the influence of the undulation as much as possible.
[0003]
On the other hand, some hydraulic fluid reservoirs mounted on the upper part of the master cylinder have a structure in which the length of the reservoir body is large and a part of the reservoir body protrudes in the length direction from the upper part of the master cylinder (for example, there is a case in which the reservoir is formed) Japanese Utility Model Publication No. 8-2006 or JP-A-2002-67923). Due to restrictions on the layout of the engine room, which is the installation location, the aim is to secure the required amount of hydraulic fluid by increasing the length while reducing the width and height of the reservoir body. It is. The reservoir body having a size in the length direction larger than the size in the width direction is a passage for supplying the hydraulic fluid to the master cylinder on one side in the length direction. A nipple for connecting to the boss of the cylinder and an opening for lubricating the inside of the reservoir body are provided on the other side of the reservoir body, respectively. The portion of the reservoir body including the opening protrudes from one end of the master cylinder and is off the upper portion of the master cylinder. Thereby, the opening for lubrication is arranged so that the hydraulic fluid can be easily lubricated in the engine room accommodating a large number of parts and devices.
[0004]
[Problems to be solved by the invention]
A hydraulic fluid reservoir having a long reservoir body, a part of which protrudes from the top of the master cylinder in the longitudinal direction, is suitable as a device to be disposed in an engine room that accommodates a large number of components and devices. It is. However, in such a new configuration of the working fluid reservoir, the arrangement of the liquid level detecting means including the float is based on the above-described design concept, that is, the connection of the float with the reservoir body and the master cylinder. The idea of placing it directly above the department was adopted exclusively. For this reason, it is difficult to further reduce the size of the portion of the reservoir body where the float is to be disposed (the portion of the reservoir body having the nipple and the coupling portion) and to design the reservoir body. There were restrictions on the above. In particular, in this type of hydraulic fluid reservoir in which the length of the reservoir body is large, the side with the opening for lubrication is located at a high position, and the opposite side with the nipple is located at a low position. This is because there is a demand for making the portion of the reservoir body which is placed on the upper portion of the master cylinder and located at a relatively low position smaller (not only the width but also the height).
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic fluid reservoir that can further increase the degree of freedom in designing a reservoir body that is configured to protrude from an upper portion of a master cylinder in a length direction. Another object of the present invention is to provide a hydraulic fluid reservoir having a float holding member suitable for a reservoir body having a large size in the longitudinal direction. Further specific objects of the present invention will become apparent from the following description.
[0006]
[MEANS FOR SOLVING THE PROBLEMS]
In the present invention, as shown in the following A and B, the liquid level detecting means is provided in a new arrangement different from the conventional arrangement.
A includes a float that moves up and down in the reservoir body in accordance with the amount of hydraulic fluid inside the reservoir body, and a liquid surface for detecting the amount of hydraulic fluid inside the reservoir body. The detecting means is located between the portion of the reservoir body including the nipple and the portion of the reservoir body including the opening for lubricating, in the longitudinal direction of the reservoir body.
B A reservoir support member for supporting the bottom of the reservoir body above the master cylinder is located at the position where the liquid level detecting means is located in the longitudinal direction of the reservoir body.
[0007]
The reservoir support member itself for supporting the reservoir body is publicly known, and is provided separately from the one provided integrally with the reservoir body (for example, Japanese Utility Model Publication No. 8-2006). (For example, JP-A-2002-87240). The working fluid reservoir of the present invention can employ any of those forms as the reservoir support member. When the vehicle swings, the reservoir body having a large size in the longitudinal direction is not only a portion of the coupling portion adjacent to the nipple (that is, a coupling portion coupling the master cylinder and the reservoir body), This reservoir support member will also move integrally with the master cylinder. Therefore, it is expected that the turbulence of the fluid level of the working fluid inside the reservoir body is smaller at those locations than at other locations in the longitudinal direction of the reservoir body. That is, in the longitudinal direction of the reservoir body, the position where the reservoir support member is located is the same as the position where the connecting portion that connects the master cylinder and the reservoir body is located, where the liquid level detecting means should be disposed. It is a place of.
[0008]
The reservoir body is a molded product of a synthetic resin like the conventional one, and has a two-part structure of an upper half and a lower half. In the lower half of the reservoir body, there is a guide member for guiding the movement of the float inside the bottom wall, and a lead switch accommodating portion for receiving a lead switch outside the bottom wall. is there. Since the reed switch outputs a liquid level detection signal by the magnetic force of the magnet held by the float, the float guide member and the reed switch accommodating portion are located at the same position in the longitudinal direction of the reservoir body. Of course, it is located. The float guide member is usually in the shape of a cylinder with an open top. Therefore, it is necessary to prevent the internal float from jumping out of the guide member. A claw member provided at the upper end of the float guide member or a protrusion provided on the inner wall of the upper half of the reservoir body can be used as the float holding member for preventing the float from jumping out. However, the most preferred form is a specific plate-like body provided integrally with the upper half on the inner wall of the upper half of the reservoir body. The plate-like body is arranged so as to cross the longitudinal direction of the reservoir body, and at least one side of the plate-like body is provided with the working fluid inside the reservoir body in the longitudinal direction of the reservoir body. They are making passages that allow them to move to. Further, in the longitudinal direction of the reservoir body, behind the plate-like body, closer to the opening for lubrication, and facing the side passage of the plate-like body, the longitudinal direction of the reservoir body is And a baffle plate for blocking the flow of the hydraulic fluid moving to the vehicle. The plate-like body, which also serves as the float holding member, prevents the hydraulic fluid from moving to the side of the opening for lubrication and leaking to the outside through the opening in cooperation with the baffle plate.
[0009]
In addition, the lead switch accommodating portion is provided with an insertion opening for inserting or removing the lead switch on the front side of the reservoir body including the lubricating opening in the longitudinal direction thereof. good. Then, even if there is a difference between the mounted vehicles, for example, a difference between the left handle and the right handle, the lead switch can be inserted into or removed from the lead switch housing along the same direction. .
[0010]
In many cases, the present invention is applied to a tandem type master cylinder. In this case, a coupling portion for coupling the master cylinder and the reservoir body is located between the two nipples.
[0011]
【Example】
The drawings show an example in which the present invention is applied to a hydraulic fluid reservoir for a tandem brake master cylinder. FIG. 1 shows a hydraulic fluid reservoir 20 assembled to a brake master cylinder 10. I have. The tandem-type master cylinder 10 is an elongate hydraulic pressure generator in which primary and secondary components are built in a cylinder body 12. The master cylinder 10 is mounted on a vehicle with the side having the mounting flange 12f facing the dashboard of the vehicle. In the upper part of the cylinder body 12, two boss portions 14p and 14s are provided at positions separated from each other in the axial direction corresponding to the primary and secondary systems. Further, between the boss portions 14p and 14s, there is a connecting portion 16 for connecting the master cylinder 10 and the hydraulic fluid reservoir 20. The main body of the connecting portion 16 is a pin 162.
[0012]
In a state where the master cylinder 10 is mounted on the vehicle, the master cylinder 10 is inclined forward and upward from one side having the mounting flange 12f toward one end located in front of the vehicle. The main body of the hydraulic fluid reservoir 20 is a reservoir body 22 made of a synthetic resin having a longer length than the size in the width direction. The reservoir body 22 has a two-part structure of an upper half 22u and a lower half 22d. The two halves 22u and 22d are heat-welded and integrated with each other to define a space for storing a hydraulic fluid therein. I have. Most of the reservoir body 22 having a large length, including one end, rests on the upper part of the cylinder body 12 of the master cylinder 10, but a part including the other end protrudes from the end of the cylinder body 12 to form the master cylinder 10. It protrudes from the top. The opening 26 for lubrication is located at the upper part of this protruding side. The hydraulic fluid reservoir 20 mounted on the master cylinder 10 inclined upwardly forward is also inclined upwardly and the opening 26 is highest. Therefore, peripheral parts hardly hinder the operation of lubrication or replenishment performed through the opening 26. Further, the opening 26 covered by the cap 28 is horizontal, and the lubrication or replenishment work is easy from this point as well.
[0013]
Outside the bottom of the lower half 22d of the reservoir body 22, nipples 31 and 32 serving as hydraulic fluid supply passages are provided at locations corresponding to the bosses 14p and 14s on the master cylinder 10 side (the cross-sectional structure is not shown). As shown in FIG. 2), a pair of connecting flanges 164 for the connecting portion 16 is provided between the nipples 31 and 32. In the hydraulic fluid reservoir 20, the nipples 31 and 32 at the bottom of the reservoir body 22 are inserted into the bosses 14p and 14s on the master cylinder 10 side via grommet seals. Maintain support form. Outside the bottom of the lower half 22d of the reservoir body 22, there is a pair of reservoir support members 40 integral with the lower half 22d. The reservoir support members 40 are located near the opposite side of the nipples 31 and 32 in the longitudinal direction of the reservoir body 22, that is, near the side where the opening 26 for lubrication is located. Located in. The lower end of the reservoir support member 40 hits the upper surface of the cylinder body 12 of the master cylinder 10 (the reason why the tip shapes of the pair of left and right reservoir support members 40 are different is to match the shape of the cylinder body 12. 3.) When the vehicle swings, the hydraulic fluid reservoir 20 is supported so as to move integrally with the master cylinder 10. In addition, when lubricating the working fluid through the pressure feeding hose into the opening 26, the reservoir support member 40 effectively prevents the working fluid reservoir 20 from falling down.
[0014]
As can be seen from FIG. 2 showing the cross-sectional structure of the reservoir main body 22, the reservoir main body 22 having a large length in the longitudinal direction is spaced apart from one short end toward the other end having the opening 26. And first, second and third partition walls 51, 52 and 53. In each of these partition walls, the upper partition wall of the upper half 22u and the lower partition wall of the lower half 22d are integrally heat-welded at a welding line H. Thus, each of the partition walls 51, 52, 53 reinforces the mechanical strength of the reservoir main body 22, and also partitions the internal space of the reservoir main body 22 in the longitudinal direction. Nevertheless, the first and third partition walls 51 and 53 adjacent to the nipples 31 and 32 have L-shaped welded portions as shown in FIG. 4 in which the upper half 22u is viewed from below. Although it is configured to surround the communication port of each nipple 31, 32, it does not block the internal space back and forth. On the other hand, the second partition 52 covers the entire area in the width direction of the reservoir main body 22 to partition the primary side and the secondary side. In order to communicate the space before and after the second partition 52 is partitioned, a rectangular communication port 522 is provided at a portion facing the upper inner wall of the upper half 22u. Here, the lowest position of the communication port 522 of the second partition wall 52 is the minimum liquid level position of the hydraulic fluid to be stored in the internal space of the reservoir main body 22 ("MIN" in FIG. 1). (The height position of the attached liquid level display scale). Thus, even if a failure occurs in one of the primary and secondary systems adjacent to the second partition 52, the minimum necessary hydraulic fluid can be secured in the other system. In addition, one side portion 52t of the partition wall 52 that defines the lowest position of the communication port 522 is a taper that becomes thinner toward the communication port 522. This is because the upper half 22u is easily die-cut during molding.
[0015]
Now, the working fluid reservoir 20 is provided with a liquid level detecting means for detecting the amount of working fluid inside the reservoir main body 22 at a position different from the normal position. The location is between the portion where the nipple 32 is located and the portion where the opening 26 is located in the longitudinal direction of the reservoir body 22, and is where the reservoir support member 40 is located. Outside the bottom wall of the lower half 22d of the reservoir body 40, between the pair of reservoir support members 40, there is a lead switch housing portion 56 for receiving a lead switch. The lead switch accommodating portion 56 has a shape along the axial direction of the master cylinder 10 and the working fluid reservoir 20 (or the length direction of the reservoir main body 22), and includes the opening 26 for lubricating. Has an insertion port 56i for inserting or removing a lead switch. Therefore, as compared with the case where the lead switch is inserted from a direction orthogonal to the length direction, the lead switch and the lead wire extending therefrom can be easily handled. Also, even if an external force directed toward the master cylinder 10 acts on the hydraulic fluid reservoir 20, the lead switch housing 56 comes into contact with the cylinder body 12 and is pushed by the presence of the reservoir support member 40. However, an excessive force (load) that may cause damage to the lead switch incorporated in the lead switch accommodating portion 56 does not act.
[0016]
A cylindrical float guide member 60 is provided on the inner wall of the lower half 22d where the lead switch housing 56 is located. The float guide member 60 is provided with a slit 62 for communicating the inside and outside of the float guide member 60 on one side thereof, and a pair of guide projections 64 on mutually facing portions of the inner wall of the cylinder. The float guide member 60 has a float (not shown) on its inner periphery, and guides the float to move up and down by a guide projection 64. Since the float holds a magnet at the bottom, when the amount of the working fluid is insufficient, a lead switch (not shown) in the lead switch accommodating portion 56 is operated by the magnetic force of the magnet. Alerts the driver of the vehicle.
[0017]
The amount of the hydraulic fluid in the hydraulic fluid reservoir 20 is calculated from the liquid level scale shown in FIG. 1, that is, the minimum liquid level height position with “MIN” and the maximum liquid level position with “MAX”. As can be seen, it will exceed the height of the float guide member 60. Therefore, it is necessary to take measures to prevent the float from jumping out of the guide member 60. Here, the float holding member 70 is provided at the upper half 22u located directly above the float guide member 60. The float holding member 70 is a plate-like body integral with the upper half 22u, and is arranged so as to cross the longitudinal direction of the reservoir main body 22. A passage is formed to allow the hydraulic fluid inside the body 22 to move in the longitudinal direction of the reservoir body 22. One or two or three float holding members 70 can be provided in the width and / or length direction of the reservoir body 22. In the example shown in the figure, the number of the float holding members 70 is two in the width direction (see FIG. 4). Has become. The reason why the plate-like body, which is the float holding member 70, is crossed in the longitudinal direction of the reservoir body 22 is to prevent unnecessary disturbance of the moving hydraulic fluid. Therefore, the plate-like body may have another shape that does not cause undue disorder, for example, a waveform or a curved shape.
[0018]
Since the opening 26 for lubricating is provided further forward of the float holding member 70, it is necessary to prevent the hydraulic fluid from leaking therethrough. Because the opening 26 of the working fluid reservoir 20 has the cap 28, there is a slit for making the internal space of the reservoir main body 22 an atmospheric pressure. This is because there is a risk of leakage to the outside. In order to prevent such a liquid leakage, a baffle plate 74 for blocking the hydraulic fluid flowing toward the opening 26 is disposed between the plate-like body serving as the float holding member 70 and the opening 26. In particular, the baffle plate 74 ensures that the flow of the hydraulic fluid from the middle passage 72 of the two plate-shaped members arranged in a C shape is reliably blocked. The baffle plate 74 can also be formed integrally with the upper half 22u.
[Brief description of the drawings]
FIG. 1, showing an embodiment of the present invention, is a side view showing a form assembled to a master cylinder.
FIG. 2 is a sectional view taken along the length direction of the working fluid reservoir of FIG.
FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;
FIG. 4 is a view of the upper half of the reservoir body as viewed from below.
[Explanation of symbols]
Reference Signs List 10 Master cylinder 16 Coupling portion 20 Hydraulic fluid reservoir 22 Reservoir main body 22u Upper half 22d Lower half 26 Openings 31, 32 Nipple 40 Reservoir support members 51, 52, 53 Partition wall 522 Communication port 56 Lead switch housing 56i Insertion opening 60 Float guide member 70 Float holding member 72 Passage 74 Baffle plate

Claims (5)

幅方向の大きさに比べて長さ方向の大きさが大きいリザ−バ本体と、そのリザ−バ本体の長さ方向の一方の側に位置し、マスタシリンダに作動液を供給する通路となり、しかも、マスタシリンダのボス部に連結するためのニップルと、前記リザ−バ本体の長さ方向の他方の側に位置し、リザ−バ本体の内部に注油するための開口とを備え、前記ニップルを含むリザ−バ本体の部分が、マスタシリンダの上部に載るのに対し、前記開口を含むリザ−バ本体の部分は、マスタシリンダの一端よりも突き出てマスタシリンダの上部から外れる作動液リザ−バであって、次の各点を特徴とする作動液リザ−バ。
A 前記リザ−バ本体の内部の作動液の量に応じてリザ−バ本体の中を上下方向に移動するフロ−トを含み、前記リザ−バ本体の内部の作動液量を検出するための液面検出手段が、前記リザ−バ本体の長さ方向上、前記ニップルを含むリザ−バ本体の部分と前記開口を含むリザ−バ本体の部分との間に位置している。
B 前記リザ−バ本体の長さ方向上、前記液面検出手段が位置する個所に、前記リザ−バ本体の底部をマスタシリンダの上部に支持するためのリザ−バ支持部材がある。
A reservoir body having a size in the length direction larger than the size in the width direction, and a passage located on one side in the length direction of the reservoir body to supply hydraulic fluid to the master cylinder; Further, the nipple includes a nipple for connecting to a boss portion of the master cylinder, and an opening located on the other side in the longitudinal direction of the reservoir body for lubricating the inside of the reservoir body. The portion of the reservoir body including the opening rests on the upper portion of the master cylinder, whereas the portion of the reservoir body including the opening protrudes beyond one end of the master cylinder and comes off the upper portion of the master cylinder. A hydraulic fluid reservoir characterized by the following points.
A a float for moving up and down in the reservoir body according to the amount of hydraulic fluid inside the reservoir body, and for detecting the amount of hydraulic fluid inside the reservoir body. Liquid level detecting means is located between the portion of the reservoir body including the nipple and the portion of the reservoir body including the opening in the longitudinal direction of the reservoir body.
B. A reservoir support member for supporting the bottom of the reservoir body above the master cylinder at a position where the liquid level detecting means is located in the longitudinal direction of the reservoir body.
前記リザ−バ本体は、上側半分と下側半分との二つ割り構造であり、前記液面検出手段は、前記フロ−トと、そのフロ−トが保持するマグネットの磁力によって液面検知信号を出すリ−ドスイッチとを備え、さらに、前記下側半分の底壁の外側に前記リ−ドスイッチを入れるリ−ドスイッチ収容部があり、前記下側半分の底壁の内側に前記フロ−トの動きをガイドするガイド部材があり、しかもまた、前記上側半分の内壁に、前記フロ−トが前記ガイド部材の中から飛び出るのを防止するフロ−ト押さえ部材がある、請求項1の作動液リザ−バ。The reservoir body has a two-part structure of an upper half and a lower half. The liquid level detecting means outputs a liquid level detection signal by the float and the magnetic force of a magnet held by the float. A lead switch accommodating portion for receiving the lead switch outside the bottom wall of the lower half, and the float inside the bottom wall of the lower half. 2. The hydraulic fluid according to claim 1, wherein there is a guide member for guiding the movement of the hydraulic fluid, and a float holding member for preventing the float from jumping out of the guide member is provided on the inner wall of the upper half. Reservoir. 前記フロ−ト押さえ部材は、前記上側半分と一体の板状体であり、その板状体は、前記リザ−バ本体の長さ方向に対してクロスする配置であり、しかも、その少なくとも一側方に、前記リザ−バ本体の内部の作動液がリザ−バ本体の長さ方向に移動するのを許す通路を作っており、さらに、前記リザ−バ本体の長さ方向上、前記開口に近い前記板状体の背後であり、前記通路に面する個所に、前記リザ−バ本体の長さ方向に移動する作動液の流れを遮断する邪魔板を備える、請求項1の作動液リザ−バ。The float holding member is a plate-like body integral with the upper half, and the plate-like body is arranged so as to cross the longitudinal direction of the reservoir body, and has at least one side thereof. On the other hand, a passage is formed to allow the working fluid inside the reservoir body to move in the length direction of the reservoir body, and further, the opening is formed in the opening in the length direction of the reservoir body. 2. The hydraulic fluid reservoir according to claim 1, further comprising a baffle plate at a position behind the plate-like body close to the passage and blocking a flow of the hydraulic fluid moving in a longitudinal direction of the reservoir body. Ba. 前記リ−ドスイッチ収容部は、前記リザ−バ本体の長さ方向上、前記開口を含む側の前面に、前記リ−ドスイッチを挿入あるいは取り外すための挿入口を備える、請求項2の作動液リザ−バ。3. The operation according to claim 2, wherein the lead switch receiving portion has an insertion opening for inserting or removing the lead switch on a front surface including the opening in a longitudinal direction of the reservoir body. Liquid reservoir. 前記マスタシリンダはタンデム型で前記ニップルは2つあり、それら2つのニップルの間に、前記マスタシリンダと前記リザ−バ本体とを結合するための結合部がある、請求項1の作動液リザ−バ。2. The hydraulic fluid reservoir according to claim 1, wherein the master cylinder is a tandem type, has two nipples, and has a connecting portion between the two nipples for connecting the master cylinder and the reservoir body. Ba.
JP2002234194A 2002-08-09 2002-08-09 Hydraulic fluid reservoir Pending JP2004074837A (en)

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Publication number Priority date Publication date Assignee Title
EP2228273A2 (en) 2009-03-11 2010-09-15 Bosch Corporation Reservoir tank and brake device using the reservoir tank
JP2010208547A (en) * 2009-03-11 2010-09-24 Bosch Corp Reservoir tank and brake device using the same
US8607563B2 (en) 2009-03-11 2013-12-17 Bosch Corporation Reservoir tank and brake device using the reservoir tank
JP2011025736A (en) * 2009-07-22 2011-02-10 Bosch Corp Reservoir tank and brake device using the same
JP2011143736A (en) * 2010-01-12 2011-07-28 Bosch Corp Reservoir tank and brake device using the same
CN104203677A (en) * 2012-03-30 2014-12-10 日信工业株式会社 Body reservoir assembly
EP2832603A4 (en) * 2012-03-30 2015-12-02 Nissin Kogyo Kk Body reservoir assembly
US9981641B2 (en) 2012-03-30 2018-05-29 Autoliv Nissin Brake Systems Japan Co., Ltd. Body reservoir assembly
JP2016130092A (en) * 2015-01-14 2016-07-21 日信工業株式会社 Reservoir of fluid pressure master cylinder for vehicle
JP2021094976A (en) * 2019-12-17 2021-06-24 ボッシュ株式会社 Reservoir tank

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