JP4299713B2 - Hydraulic master cylinder for motorcycles - Google Patents

Hydraulic master cylinder for motorcycles Download PDF

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JP4299713B2
JP4299713B2 JP2004106079A JP2004106079A JP4299713B2 JP 4299713 B2 JP4299713 B2 JP 4299713B2 JP 2004106079 A JP2004106079 A JP 2004106079A JP 2004106079 A JP2004106079 A JP 2004106079A JP 4299713 B2 JP4299713 B2 JP 4299713B2
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cylinder
liquid
passage
reservoir
hole
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JP2005289180A (en
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祥 太田
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Nissin Kogyo Co Ltd
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Description

本発明は、自動二輪車に搭載されるブレーキ用の液圧マスタシリンダに係り、詳しくは、上下方向に長い縦長のシリンダ孔を有するシリンダボディの側部上方にリザーバを一体に備えた自動二輪車用液圧マスタシリンダに関する。 The present invention relates to a brake hydraulic master cylinder mounted on a motorcycle. More specifically, the present invention relates to a fluid for a motorcycle that is integrally provided with a reservoir above a side of a cylinder body having a vertically long cylinder hole in the vertical direction. Pressure master cylinder.

従来、縦長のシリンダ孔を有するシリンダボディの側部上方に、貯液室を備えたリザーバを一体形成した車両用液圧マスタシリンダでは、前記貯液室の底部と前記シリンダボディの側部との間に連通路形成部を設け、該連通路形成部に、前記シリンダ孔に連通する2本の液通孔と、前記貯液室と連通し、且つ前記2本の液通孔と交わる液通路とが形成されている。   Conventionally, in a vehicular hydraulic master cylinder in which a reservoir having a liquid storage chamber is integrally formed above a side portion of a cylinder body having a vertically long cylinder hole, a bottom portion of the liquid storage chamber and a side portion of the cylinder body are provided. A communication passage forming portion is provided between the two liquid passage holes communicating with the cylinder hole, the liquid passage communicating with the liquid storage chamber, and intersecting the two liquid passage holes. And are formed.

前記液通孔は、シリンダ孔内に画成される液圧室及び補給液室に作動液を供給するもので、連通路形成部に、シリンダ軸線と直交する貫通孔をシリンダ孔に向けて穿設し、該貫通孔の反シリンダ孔側開口部にスチールボールを圧入して閉塞することにより形成されている。また、液通路は貯液室の底部から該貯液室の軸線方向に延設され、前記2本の液通孔と交わるように形成されている(例えば、特許文献1。)。
特開2001−140801号公報
The fluid passage hole supplies hydraulic fluid to a fluid pressure chamber and a replenishment fluid chamber defined in the cylinder hole, and a through hole perpendicular to the cylinder axis is formed in the communication path forming portion toward the cylinder hole. It is formed by press-fitting a steel ball into the opening on the side opposite to the cylinder hole of the through hole. The liquid passage extends from the bottom of the liquid storage chamber in the axial direction of the liquid storage chamber, and is formed so as to intersect the two liquid passage holes (for example, Patent Document 1).
JP 2001-140801 A

しかし、上述のものでは、連通路形成部に形成される液通路が、貯液室の軸線方向に延設されることから、液通孔に設けるスチールボールと液通路とが交錯しないように、各液通孔を長く形成しなければならなかった。このため、連通路形成部をシリンダ軸と直交方向に大きく形成しなければならず、液圧マスタシリンダの重量が嵩むという問題があった。   However, in the above, the liquid passage formed in the communication passage forming portion extends in the axial direction of the liquid storage chamber, so that the steel ball provided in the liquid passage hole and the liquid passage do not cross each other. Each liquid passage hole had to be formed long. For this reason, there is a problem that the communication path forming portion must be formed large in the direction orthogonal to the cylinder axis, and the hydraulic master cylinder is heavy.

そこで本発明は、簡単な構造で、リザーバとシリンダ孔との間の作動液流通性を良好に確保するとともに、連通路形成部を小さく形成し、液圧マスタシリンダの小型軽量化を図ることを目的としている。   Therefore, the present invention has a simple structure, ensures good fluid flowability between the reservoir and the cylinder hole, and reduces the size and weight of the hydraulic master cylinder by forming the communication passage forming portion small. It is aimed.

上記の目的を達成するため本発明は、縦長のシリンダ孔を有するシリンダボディとリザーバの貯液室の底部との間に形成される連通路形成部を介して、前記リザーバをシリンダボディの上部一側に一体形成し、該連通路形成部に、前記シリンダ孔に連通する液通孔と、前記貯液室と連通し、且つ前記液通孔と交わる液通路とを形成した自動二輪車用液圧マスタシリンダにおいて、前記貯液室の底部側を前記シリンダ孔側に傾けて形成するとともに、前記液通路は、該液通路の反リザーバ側を、前記貯液室の軸線に対してシリンダ孔側に傾けて形成したことを特徴としているIn order to achieve the above-mentioned object, the present invention is configured so that the reservoir is connected to the upper portion of the cylinder body through a communication passage forming portion formed between a cylinder body having a vertically long cylinder hole and a bottom portion of the reservoir storage chamber. integrally formed on the side, to the communication passage forming portion, and the fluid communication hole communicating with the cylinder bore, communicating with the liquid reservoir chamber, and the liquid hole and intersects the fluid passage and fluid pressure for a motorcycle to form an In the master cylinder, the bottom side of the liquid storage chamber is formed so as to be inclined toward the cylinder hole, and the liquid passage is configured such that the anti-reservoir side of the liquid passage is on the cylinder hole side with respect to the axis of the liquid storage chamber. It is characterized by being tilted.

上述の発明により、シリンダ孔に連通する液通孔の長さを短くすることができるので、連通路形成部を小さく形成することができ、液圧マスタシリンダの小型軽量化を図ることができる。   According to the above-described invention, since the length of the fluid passage hole communicating with the cylinder bore can be shortened, the communication passage forming portion can be formed small, and the hydraulic master cylinder can be reduced in size and weight.

以下、本発明を自動二輪車の後輪ブレーキ用液圧マスタシリンダに適用した一形態例を図面に基づいて詳しく説明する。本形態例の液圧マスタシリンダ1は、縦長略円筒状のシリンダボディ2の上部一側に、縦長円筒状のリザーバ3が一体に形成されたもので、前記シリンダボディ2とリザーバ3とは、シリンダボディ2に形成されるシリンダ孔2aの軸線L1と、リザーバ3に形成される貯液室3aの軸線L2とが、非平行となるように設定されており、貯液室3aの底部側をシリンダ孔2a側に傾けて形成されている。貯液室3aの底部とシリンダボディ2の側部との間には、連通路形成部4が形成され、該連通路形成部4に、本発明の液通孔となるリリーフポート5及びサプライポート6と、液通路7とが形成されている。   Hereinafter, an embodiment in which the present invention is applied to a hydraulic master cylinder for a rear wheel brake of a motorcycle will be described in detail based on the drawings. The hydraulic master cylinder 1 of the present embodiment is an example in which a vertically long cylindrical reservoir 3 is integrally formed on the upper side of a vertically long substantially cylindrical cylinder body 2, and the cylinder body 2 and the reservoir 3 are: The axis L1 of the cylinder hole 2a formed in the cylinder body 2 and the axis L2 of the liquid storage chamber 3a formed in the reservoir 3 are set to be non-parallel, and the bottom side of the liquid storage chamber 3a is It is formed to be inclined toward the cylinder hole 2a. A communication passage forming portion 4 is formed between the bottom of the liquid storage chamber 3a and the side portion of the cylinder body 2, and the relief passage 5 and the supply port serving as the liquid passage holes of the present invention are formed in the communication passage forming portion 4. 6 and a liquid passage 7 are formed.

シリンダボディ2は、縦長有底のシリンダ孔2aが下端を開口して形成され、該シリンダ孔2aに、ピストン8がプライマリカップ9とセカンダリカップ10とを用いて液密且つ移動可能に内挿されるとともに、ピストン8とシリンダ孔2aの上壁との間に液圧室11が、また、ピストン8中間部とシリンダ孔2aの周壁との間には補給液室12がそれぞれ画成されている。ピストン8とシリンダ孔2a上壁との間には、リターンスプリング13が縮設されており、ピストン8はリターンスプリング13の弾発力によって、非作動方向である下方向に付勢され、その後退限が、シリンダ孔2aの開口部に係着したサークリップ14に係止されるプッシュロッド15の頭部15aとの当接によって規制されている。液圧室11には、ユニオン孔16が連通して設けられている。   The cylinder body 2 is formed with a vertically long bottomed cylinder hole 2a with its lower end opened, and a piston 8 is inserted into the cylinder hole 2a using a primary cup 9 and a secondary cup 10 so as to be liquid-tight and movable. In addition, a hydraulic chamber 11 is defined between the piston 8 and the upper wall of the cylinder hole 2a, and a replenishing fluid chamber 12 is defined between the intermediate portion of the piston 8 and the peripheral wall of the cylinder hole 2a. A return spring 13 is contracted between the piston 8 and the upper wall of the cylinder hole 2a, and the piston 8 is urged downward by the elastic force of the return spring 13 to move backward. The limit is restricted by contact with the head 15a of the push rod 15 that is locked to the circlip 14 that is engaged with the opening of the cylinder hole 2a. The hydraulic chamber 11 is provided with a union hole 16 in communication therewith.

リザーバ3は、シリンダボディ2と一体に形成した貯液槽3bと、該貯液槽3bの上部開口に被着される蓋部材3cとを有していて、これらの間にはダイヤフラム17が挟着されている。貯液槽3bの内部には、縦長円筒状の前記貯液室3aが、設けられている。   The reservoir 3 has a liquid storage tank 3b formed integrally with the cylinder body 2, and a lid member 3c attached to the upper opening of the liquid storage tank 3b, and a diaphragm 17 is sandwiched between them. It is worn. The vertically long cylindrical liquid storage chamber 3a is provided inside the liquid storage tank 3b.

連通路形成部4は、リザーバ3及びシリンダボディ2と一体に形成され、貯液槽3bの底部から下方に突出するとともに、シリンダボディ2の側部からシリンダ軸と直交する方向に突出している。連通路形成部4には、外側面から、シリンダ孔2aに向けてシリンダ軸に直交する2本の貫通孔が穿設され、該貫通孔の反シリンダ孔側開口部にスチールボール18をそれぞれ圧入して閉塞し、前記液圧室11に連通するリリーフポート5と、前記補給液室12に連通するサプライポート6とがそれぞれ形成されている。さらに、連通路形成部4には、これらリリーフポート5とサプライポート6とに交わり、且つ貯液室3aの底部と連通する液通路7が形成される。この液通路7は、該液通路7の軸線L3が、前記貯液室の軸線L2に対して、角度Aだけ反リザーバ側をシリンダ孔2a側に傾けて形成されている。貯液室3aとシリンダ孔2aとは、前記リリーフポート5,サプライポート6,液通路7とで連通され、貯液室3aとシリンダ孔2aとの間を作動液Fが流通できるようになっている。   The communication path forming portion 4 is formed integrally with the reservoir 3 and the cylinder body 2 and protrudes downward from the bottom of the liquid storage tank 3b and protrudes from the side of the cylinder body 2 in a direction perpendicular to the cylinder axis. Two through holes perpendicular to the cylinder axis are formed in the communication path forming portion 4 from the outer surface toward the cylinder hole 2a, and steel balls 18 are press-fitted into the openings on the side opposite to the cylinder hole of the through holes, respectively. A relief port 5 that is closed and communicated with the hydraulic pressure chamber 11 and a supply port 6 that communicates with the replenishing fluid chamber 12 are formed. Further, a liquid passage 7 that intersects with the relief port 5 and the supply port 6 and communicates with the bottom of the liquid storage chamber 3a is formed in the communication passage forming portion 4. The liquid passage 7 is formed such that the axis L3 of the liquid passage 7 is inclined with respect to the cylinder hole 2a by the angle A with respect to the axis L2 of the liquid storage chamber. The liquid storage chamber 3a and the cylinder hole 2a communicate with each other through the relief port 5, the supply port 6 and the liquid passage 7, so that the hydraulic fluid F can flow between the liquid storage chamber 3a and the cylinder hole 2a. Yes.

本形態例は、上述のように構成されており、液圧マスタシリンダ1は、ブレーキペダル19を踏み操作しない非作動時では図1の状態となっている。ブレーキペダル19を踏み操作すると、プッシュロッド15が上動して、ピストン8をシリンダ孔2aの上方向へ押動し、液圧室11の作動液Fがリリーフポート5,液通路7を介してリザーバ3の貯液室3aに戻され、プライマリカップ9がリリーフポート5を閉塞し、作動液Fの流通が遮断された後は、液圧室11の作動液Fが徐々に昇圧されて行く。また、ピストン8が上方向へ押動するのに従って、サプライポート6と補給液室12が連通する。   The present embodiment is configured as described above, and the hydraulic master cylinder 1 is in the state shown in FIG. 1 when the brake pedal 19 is not operated. When the brake pedal 19 is depressed, the push rod 15 is moved upward to push the piston 8 upward in the cylinder hole 2a, and the hydraulic fluid F in the hydraulic pressure chamber 11 passes through the relief port 5 and the fluid passage 7. After returning to the liquid storage chamber 3a of the reservoir 3, the primary cup 9 closes the relief port 5, and the flow of the hydraulic fluid F is blocked, the hydraulic fluid F in the hydraulic chamber 11 is gradually increased in pressure. Further, as the piston 8 is pushed upward, the supply port 6 and the replenishing liquid chamber 12 communicate with each other.

液圧室11で昇圧された作動液Fは、上部のユニオン孔16からブレーキホースを通して後輪ブレーキのキャリパボディへ送られ、後輪と一体に回転するディスクロータ(いずれも図示せず)を制動する。また、制動を解除すると、ピストン8はリターンスプリング13の弾発力によって元の位置に復帰する。このとき、プライマリカップ9がリリーフポート5から離れ、液圧室11が拡大するのに伴い、リリーフポート5,液通路7を介して貯液室3aから作動液Fが液圧室11に導入される。   The hydraulic fluid F boosted in the hydraulic chamber 11 is sent from the upper union hole 16 through the brake hose to the caliper body of the rear wheel brake, and brakes the disc rotor (none of which is shown) that rotates integrally with the rear wheel. To do. When the braking is released, the piston 8 returns to the original position by the elastic force of the return spring 13. At this time, as the primary cup 9 moves away from the relief port 5 and the hydraulic pressure chamber 11 expands, the hydraulic fluid F is introduced into the hydraulic pressure chamber 11 from the storage chamber 3a via the relief port 5 and the fluid passage 7. The

上述の液圧マスタシリンダ1では、液通路7は、該液通路7の軸線L3が、前記貯液室3aの軸線L2に対して、角度Aだけ反リザーバ側をシリンダ孔2a側に傾けて形成されることによって、リリーフポート5とサプライポート6とを従来よりも短く形成することが可能となり、連通路形成部4を従来よりも小さく形成し、液圧マスタシリンダ1の小型軽量化と車体取付性の向上を図ることができる。   In the hydraulic master cylinder 1 described above, the liquid passage 7 is formed such that the axis L3 of the liquid passage 7 is inclined with respect to the axis L2 of the liquid storage chamber 3a by an angle A on the counter-reservoir side toward the cylinder hole 2a. As a result, the relief port 5 and the supply port 6 can be formed shorter than before, the communication path forming portion 4 can be formed smaller than before, and the hydraulic master cylinder 1 can be reduced in size and weight and mounted on the vehicle body. It is possible to improve the performance.

本発明の一形態例を示す液圧マスタシリンダの断面正面図である。It is a section front view of a hydraulic master cylinder showing an example of the present invention.

符号の説明Explanation of symbols

1…液圧マスタシリンダ、2…シリンダボディ、2a…シリンダ孔、3…リザーバ、3a…貯液室、3b…貯液槽、3c…蓋部材、4…連通路形成部、5…リリーフポート、6…サプライポート、7…液通路、8…ピストン、9…プライマリカップ、10…セカンダリカップ、11…液圧室、12…補給液室、13…リターンスプリング、14…サークリップ、15…プッシュロッド、16…ユニオン孔、17…ダイヤフラム、18…スチールボール、19…ブレーキペダル、L1…シリンダ孔の軸線、L2…貯液室の軸線、L3…液通路の軸線、F…作動液   DESCRIPTION OF SYMBOLS 1 ... Hydraulic master cylinder, 2 ... Cylinder body, 2a ... Cylinder hole, 3 ... Reservoir, 3a ... Liquid storage chamber, 3b ... Liquid storage tank, 3c ... Lid member, 4 ... Communication path formation part, 5 ... Relief port, 6 ... Supply port, 7 ... Liquid passage, 8 ... Piston, 9 ... Primary cup, 10 ... Secondary cup, 11 ... Hydraulic pressure chamber, 12 ... Supply liquid chamber, 13 ... Return spring, 14 ... Circlip, 15 ... Push rod , 16 ... Union hole, 17 ... Diaphragm, 18 ... Steel ball, 19 ... Brake pedal, L1 ... Axis of cylinder hole, L2 ... Axis of liquid storage chamber, L3 ... Axis of liquid passage, F ... Hydraulic fluid

Claims (1)

縦長のシリンダ孔を有するシリンダボディとリザーバの貯液室の底部との間に形成される連通路形成部を介して、前記リザーバをシリンダボディの上部一側に一体形成し、該連通路形成部に、前記シリンダ孔に連通する液通孔と、前記貯液室と連通し、且つ前記液通孔と交わる液通路とを形成した自動二輪車用液圧マスタシリンダにおいて、前記貯液室の底部側を前記シリンダ孔側に傾けて形成するとともに、前記液通路は、該液通路の反リザーバ側を、前記貯液室の軸線に対してシリンダ孔側に傾けて形成したことを特徴とする自動二輪車用液圧マスタシリンダ。 Through the communication passage forming portion formed between the bottom of the liquid reservoir chamber of the cylinder body and the reservoir having a vertically long cylinder bore, the reservoir is formed integrally on the upper one side of the cylinder body, the communicating passage forming part A hydraulic master cylinder for a motorcycle in which a fluid passage hole communicating with the cylinder bore and a fluid passage communicating with the fluid reservoir chamber and intersecting with the fluid passage hole are formed, on the bottom side of the reservoir chamber and forming inclined to the cylinder bore side, the liquid passage, a motorcycle, characterized in that the anti-reservoir-side of the liquid passage, is formed by tilting the cylinder bore side with respect to the axis of the liquid reservoir chamber use hydraulic master cylinder.
JP2004106079A 2004-03-31 2004-03-31 Hydraulic master cylinder for motorcycles Expired - Fee Related JP4299713B2 (en)

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JP4299713B2 true JP4299713B2 (en) 2009-07-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4855201B2 (en) * 2006-10-06 2012-01-18 ヤマハ発動機株式会社 Motorcycle
JP6405147B2 (en) * 2014-08-08 2018-10-17 日信工業株式会社 Bar handle vehicle brake system
DE102019219869A1 (en) * 2019-12-17 2021-06-17 Continental Teves Ag & Co. Ohg Hydraulic braking device for a motor vehicle braking system with an improved container connection

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