JP3993351B2 - Piping connection structure of fluid actuator - Google Patents

Piping connection structure of fluid actuator Download PDF

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Publication number
JP3993351B2
JP3993351B2 JP32788099A JP32788099A JP3993351B2 JP 3993351 B2 JP3993351 B2 JP 3993351B2 JP 32788099 A JP32788099 A JP 32788099A JP 32788099 A JP32788099 A JP 32788099A JP 3993351 B2 JP3993351 B2 JP 3993351B2
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Japan
Prior art keywords
connector
pin
hole
pipe connection
fluid
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JP32788099A
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JP2001140812A (en
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典久 樋口
俊之 山田
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Nissin Kogyo Co Ltd
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Nissin Kogyo Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00Adjustable joints, Joints allowing movement
    • F16L27/08Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Actuator (AREA)
  • Joints Allowing Movement (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、車両用のブレーキやクラッチに用いる液圧マスタシリンダや、車両用ディスクブレーキのキャリパ、車両用ドラムブレーキのホイールシリンダ、車両用ブレーキのPバルブやPCVバルブ等の液圧コントロールバルブを始め、各種の産業に用いられる液圧シリンダ等の流体圧アクチュエータに流体配管を接続する構造に関する。
【0002】
【従来の技術】
液圧式車両用ブレーキの流体圧アクチュエータに流体配管を接続する従来技術として、例えば、特開平9−20225号公報や特開平11−20659号公報に示されるものがある。
【0003】
前者の接続構造は、シリンダボディに突出するボス部に、一端がシリンダボディ内部のシリンダ孔と連通し、他端がボス部の座面に開口する配管接続孔を形成して、該配管接続孔に流体配管の端部に接続したコネクタを嵌挿している。ボス部には切欠き部が座面と一側部とに開口し、また配管接続孔の内側にはピン孔が周設されていて、該ピン孔にコネクタを抜け止めするためにストッパピンが係着される。
【0004】
上記ストッパピンは、ピン孔に装着されるリング部と、該リング部の両端から外側へ突出して切欠き部に係止される一対の脚部とを備えたCリングに形成され、該脚部をペンチ等で挟んでリング部を縮径させてボス部の座面より配管接続孔に挿入し、リング部の外周側をピン孔に装着すると共に該リング部の内周側をコネクタのテーパ面に係着して、脚部を切欠き部に係止することにより、コネクタが回動自在に抜け止めされる。また、ストッパピンの脚部は、先端をボス部の外周面よりも突出させ、突出した脚部をペンチ等で挟んでリング部を縮径させることによって、容易に取り外しができるようにしている。
【0005】
一方、後者の接続構造は、シリンダボディのボス部に前者と同様の配管接続孔が形成され、同じくボス部に配管接続孔の半径方向線と平行な1本のピン孔が配管接続孔の内周面をえぐって貫通形成されている。流体配管と一体のコネクタ部分には2条のフランジが周設され、該フランジを前記ピン孔の上下に位置させると共に、該ピン孔にストッパピンを圧入することによって、流体配管のコネクタ部分が配管接続孔に回動可能に抜け止めされている。
【0006】
ところで、車両メーカにおいて車体を組み立てする際に、車体周りに作業スペースが充分に取れない等の理由から、ブレーキやクラッチのメーカが、予めブレーキやクラッチと流体圧アクチュエータとを流体配管で接続して、いわゆるプレフィルド(PRE−FILLED)状態で出荷することが行われており、流体圧アクチュエータと流体配管との接続に上述の接続構造が用いられる。
【0007】
【発明が解決しようとする課題】
しかしながら、流体配管接続用のコネクタは、周方向の回動以外の方向の動きを規制して流体圧アクチュエータに接続されるため、プレフィルド状態での搬送時に、流体圧アクチュエータと流体配管との接続部に捩れ等のいたずらな外力がかかったり、流体圧アクチュエータを車体に取り付ける際に、流体圧アクチュエータと車体側とを無理に位置合わせするために、流体圧アクチュエータと流体配管との接続部に内部応力を与えることがある。
【0008】
このうち、前者の接続構造では、ストッパピンのリング部の外周側が配管接続孔のピン孔に係合するのみで、リング部の上側はコネクタと係合せずに開放されているため、流体配管に過大な抜け方向の外力が加わると、コネクタとストッパピンとが緩んでシール性を損なったり、配管接続孔から外れる虞があった。
【0009】
また、後者の接続構造では、1本のストッパピンがコネクタ部の一個所に係合しているのみであるため、接続部に作用する外力や流体圧によってコネクタ部がストッパピンを支点として傾くことがある。この結果、コネクタ部が配管接続孔の内周面をこじってこじり粉が流体に混入したり、コネクタ部と配管接続孔との間に介装されるシールリングが早期に傷む虞がある。
【0010】
そこで本発明は、コネクタに不慮の外力や液体圧による負荷が加わることがあっても、コネクタの外れや緩み,こじり粉の混入やシールリングの損耗を有効に防止することのできる流体式アクチュエータの配管接続構造を提供することを目的としている。
【0011】
【課題を解決するための手段】
上記の目的を達成するため、本発明は、流体式アクチュエータのシリンダボディにボス部を突設して、該ボス部に前記シリンダボディ内部のシリンダ孔と連通する配管接続孔を形成し、該配管接続孔内部に嵌挿した流体配管接続用のコネクタをストッパピンにて抜け止めする流体式アクチュエータの配管接続構造において、前記ボス部には、その中心軸と直交する面上に、前記配管接続孔の内周面をえぐる2本のピン孔を前記中心軸を挟んで平行に穿設し、両ピン孔の両端を、前記ボス部の外周面に開口させるとともに、前記コネクタを前記配管接続孔へ嵌挿した際に前記ピン孔と共に前記中心軸と直交する同一面上に配設される環状溝を、前記コネクタの外周に形成し、前記ピン孔にU字状に形成した前記ストッパピンの2本の軸部を、前記ピン孔にそれぞれ挿通すると共に前記配管接続孔に嵌挿した前記コネクタの環状溝に掛け渡して前記コネクタを回動自在に抜け止めし、かつ、前記ピン孔から突出する前記軸部の一方の端部の切込み部を広げてストッパピンの抜け止め部を形成したことを特徴としている
【0013】
【発明の実施の形態】
以下、本発明の流体圧アクチュエータを、車両のクラッチに用いる液圧マスタシリンダに適用した各形態例を図面に基づいて説明する。
【0014】
図1乃至図3は本発明の第1形態例を示すもので、図1は液圧マスタシリンダと配管の接続構造を示す要部断面図、図2は液圧マスタシリンダの断面正面図、図3は図1のIII−III断面図である。
【0015】
クラッチ用の液圧マスタシリンダ1は、車体に固設される横長のシリンダボディ2に、一端を開口した有底のシリンダ孔3が設けられ、該シリンダ孔3にピストン4が液密かつ移動可能に内挿されると共に、ピストン4とシリンダ孔3の底壁との間に液圧室5が画成されている。
【0016】
ピストン4の後端面には凹部4aが球面状に形成され、該凹部4aにプッシュロッド6の球面状頭部6aが収容されていて、プッシュロッド6の基端に連結されたクラッチペダルを踏み操作すると、プッシュロッド6が液圧マスタシリンダ1方向へ前進し、ピストン4をシリンダ孔3の底部方向へ押動して、液圧室5内の作動液を昇圧するようになっている。
【0017】
液圧室5の先端側上部にはボス部7が突設され、該ボス部7には、液圧室5に連通する小径の流体流通孔8と、ボス部7の座面に開口する大径の配管接続孔9とが連設されている。配管接続孔9には、クラッチの近傍に配設された別途のスレーブシリンダにつながれる流体配管10のコネクタ11が嵌挿され、該コネクタ11を配管接続孔9にストッパピン12を用いて回動可能に抜け止めしている。
【0018】
ボス部7には、その中心軸Oと直交する面S上に、配管接続孔9の内周面を直線状にえぐる2本のピン孔13,13が中心軸Oを挟んで平行に穿設され、該ピン孔13,13の両端を、ボス部7の外周面7aに開口させている。
【0019】
コネクタ11は、流体配管10を接続するための大径部11aと、配管接続孔9に嵌挿される中径部11bと、流体流通孔8に嵌挿される小径部11cとを有しており、大径部11aには流体配管10が固定ボルト14を用いて取付けられ、また、中径部11bと小径部11cの中心軸上には、流体配管10と流体流通孔8とに連通する連通孔11dが形成されている。中径部11bの外周には環状溝11eが形成されており、コネクタ11を配管接続孔9へ嵌挿した際には、環状溝11eが配管接続孔9のピン孔13と共にボス部7の中心軸Oと直交する面S上に配設されるようになっている。
【0020】
前記ストッパピン12は、金属製の棒材をU字状に折曲げて形成したもので、2本の軸部12a,12aの長さは、ボス部7に形成されたピン孔13,13よりも長く形成されており、さらに一方の軸部12aの端部には、切込み部12bが形成されている。
【0021】
コネクタ11は、配管接続孔9と中径部11bの底部間にシールリング15を介装して嵌挿され、該シールリング15によって配管接続孔9と中径部11bとの間が液密にシールされると共に、液圧室5と流体流通孔8,連通孔11d,流体配管10とが連通する。そして、このようにコネクタ11を配管接続孔9に嵌挿すると、コネクタ11の環状溝11eと配管接続孔9のピン孔13,13とが面S上で内外に位置合わせされ、ピン孔13,13の開口よりストッパピン12の軸部12a,12aを挿入することによって、軸部12a,12aがピン孔13,13と環状溝11eの双方に掛け渡され、コネクタ11が配管接続孔9に回動可能に抜け止めされる。
【0022】
ストッパピン12の軸部12a,12aの先端は、ピン孔13,13よりボス部7の外方へ突出し、一方の軸部12a先端の切込み部12bに楔を打って切込み部12bを広げることにより、ストッパピン12が抜け止めされる。
【0023】
上述のように本形態例では、U字状のストッパピン12をボス部2aに形成したピン孔13,13に挿通するだけで、コネクタ11を簡単に接続することができ、液圧マスタシリンダ1を流体配管10と接続したプレフィルド状態で搬送する際に、液圧マスタシリンダ1と流体配管10との接続部に不慮の外力が加わっても、コネクタ11とストッパピン12が正規の接続状態から傾いたり抜け落ちることがない。
【0024】
また、ストッパピン12の軸部12a,12aは、ボス部2aの中心軸Oと直交する面上に、中心軸Oを挟んで平行に挿通され、コネクタ11の環状溝11eを軸部12a,12aが均等に支持するので、車体組付け後の液圧マスタシリンダ1と流体配管10との接続部に飛石等の不慮の外力が加わったり、作動時に液圧室5に発生する液圧が作用しても、コネクタ11が傾くことを有効に防止できる。これによって、コネクタ11が配管接続孔9の内周面をこじることがなくなるので、こじり粉が作動液に混入する虞がなく、さらに、コネクタ11の傾きによって、シールリング15を早期に損耗させることもなくなる。
【0025】
図4は、本発明の第2形態例を示す配管の接続構造を示す要部断面図で、ボス部7には、その中心軸Oと直交する1つの面上に、シリンダ軸方向とこれに直交する方向に2本ずつのピン孔20,20,21,21が、配管接続孔9の内周面を直線状にえぐって穿設されている。ピン孔20,20,21,21の両端は、ボス部7の外周面7aに開口していて、中心軸Oと直交する1つの面上での4つのピン孔20,20,21,21を正方形の井桁を組んだように見せている。
【0026】
コネクタ11の外周には、第1形態例と同様に環状溝11eが形成されており、シリンダ軸と直交するピン孔21,21と環状溝11eとの組み合わせには、第1形態例と同様のU字状のストッパピン12が用いられ、またシリンダ軸方向のピン孔20,20と環状溝11eとの組み合わせには、ストッパピン12の軸部12a,12a間の距離よりも短いストッパピン22,22が用いられる。
【0027】
コネクタ11の接続には、まず2本の短いストッパピン22,22をピン孔20,20に挿通して、ストッパピン22,22をピン孔20,20と環状溝11eの中央部に掛け渡し、次いでU字状のストッパピン12の軸部12a,12aをピン孔21,21に第1形態例と同様に挿通して、軸部12a,12aをピン孔21,21と環状溝11eの双方に掛け渡す。2本の短いストッパピン22,22は、U字状ストッパピン12の軸部12a,12aの間に配設され、ストッパピン12の軸部12a,12a及びストッパピン22,22と、環状溝11eの最奥部との4つの当接部Aが、環状溝11eの周方向に90度づつ等間隔に位置する。
【0028】
U字状のストッパピン12は、一方の軸部12aの切込み部12bを楔で広げることにより抜け止めされ、これにより、ストッパピン12の軸部12a,12aの間に配設されるストッパピン22,22も抜け止めされる。
【0029】
上述のように、本形態例では、ストッパピン12の軸部12a,12a及びストッパピン22,22と、環状溝11eとの4つの当接部Aが、環状溝11eの周方向に等間隔に位置するよう設定されているので、コネクタ11をストッパピン12,22,22によって均等に支持することができ、第1形態例と同様に、作動時に液圧室5に発生する液圧や、シリンダボディ2やボス部7に不慮の外力が作用しても、コネクタ11の抜けや傾きを有効に防止し、シール性能を良好に保つと同時に、作動液へのこじり粉の混入やシールリングの早期損耗をよく防ぐことができる。
【0032】
【発明の効果】
以上説明したように、発明によれば、ストッパピンをボス部のピン孔に挿通するだけでコネクタを簡単に接続することができ、流体圧アクチュエータを流体配管と接続したプレフィルド状態で搬送する際に、流体圧アクチュエータと流体配管との接続部に不慮の外力が加わっても、コネクタとストッパピンが正規の接続状態から傾いたり抜け落ちることがない。
【0033】
また、ストッパピンの複数の軸部がコネクタの外周を均等に支持するので、車体組付け後の流体圧アクチュエータと流体配管との接続部に飛石等の不慮の外力が加わったり、作動時に流体圧アクチュエータの液圧室に発生する液圧が作用しても、コネクタが傾くことを有効に防止できる。これによって、コネクタが配管接続孔の内周面をこじることがなくなるので、こじり粉が作動液に混入する虞がなく、さらにコネクタの傾きによってシールリングを早期に損耗させることもなくなる。
【図面の簡単な説明】
【図1】 本発明の第1形態例を示すクラッチ用液圧マスタシリンダと配管との接続構造を示す要部断面図
【図2】 本発明の第1形態例を示すクラッチ用液圧マスタシリンダの断面正面図
【図3】 図1のIII−III断面図
【図4】 本発明の第2形態例を示すクラッチ用液圧マスタシリンダと配管との接続構造を示す要部断面図
【符号の説明】
1…液圧マスタシリンダ(本発明の流体圧アクチュエータ)、2…シリンダボディ、3…シリンダ孔、4…ピストン、5…液圧室、7…ボス部、7a…ボス部7の外周面、8…流体流通孔、9…配管接続孔、10…流体配管、11…コネクタ、11e…環状溝、12,22…ストッパピン、12a…ストッパピン12の脚部、13,20,21…ピン孔、15…シールリング、O…ボス部7の中心軸、A…ストッパピン12,22と環状溝11eとの当接部
[0001]
BACKGROUND OF THE INVENTION
The present invention includes hydraulic pressure control valves such as hydraulic master cylinders used for vehicle brakes and clutches, vehicle disc brake calipers, vehicle drum brake wheel cylinders, vehicle brake P valves and PCV valves. The present invention relates to a structure in which a fluid pipe is connected to a fluid pressure actuator such as a hydraulic cylinder used in various industries.
[0002]
[Prior art]
As conventional techniques for connecting a fluid pipe to a fluid pressure actuator for a hydraulic vehicle brake, for example, there are those disclosed in Japanese Patent Application Laid-Open Nos. 9-20225 and 11-20659.
[0003]
In the former connection structure, a pipe connection hole is formed in the boss part protruding from the cylinder body, with one end communicating with the cylinder hole inside the cylinder body and the other end opening on the seat surface of the boss part. A connector connected to the end of the fluid piping is inserted into the. The boss has a notch that opens to the seat and one side, and a pin hole is provided around the inside of the pipe connection hole, and a stopper pin is provided to prevent the connector from coming off the pin hole. Be attached.
[0004]
The stopper pin is formed in a C-ring including a ring portion that is mounted in the pin hole, and a pair of leg portions that protrude outward from both ends of the ring portion and are locked to the notch portions. The diameter of the ring part is reduced with a pair of pliers, etc., inserted into the pipe connection hole from the seating surface of the boss part, the outer peripheral side of the ring part is attached to the pin hole, and the inner peripheral side of the ring part is the tapered surface of the connector The connector is pivotably retained by locking the leg portion to the notch portion. Further, the leg of the stopper pin can be easily removed by causing the tip to protrude from the outer peripheral surface of the boss and reducing the diameter of the ring by sandwiching the protruding leg with pliers or the like.
[0005]
On the other hand, in the latter connection structure, a pipe connection hole similar to the former is formed in the boss part of the cylinder body, and one pin hole parallel to the radial direction line of the pipe connection hole is formed in the pipe connection hole. It is formed so as to penetrate the peripheral surface. Two flanges are provided around the connector part integrated with the fluid piping. The flange part is positioned above and below the pin hole, and a stopper pin is press-fitted into the pin hole, so that the connector part of the fluid piping is connected to the pipe. The connection hole is pivotably retained.
[0006]
By the way, when assembling a vehicle body at a vehicle manufacturer, the brake or clutch manufacturer connects the brake or clutch and the fluid pressure actuator with a fluid pipe in advance because the work space around the vehicle body is not sufficient. The so-called pre-filled (PRE-FILLED) state is shipped, and the connection structure described above is used for connection between the fluid pressure actuator and the fluid piping.
[0007]
[Problems to be solved by the invention]
However, since the connector for connecting the fluid pipe is connected to the fluid pressure actuator by restricting the movement in the direction other than the rotation in the circumferential direction, the connection portion between the fluid pressure actuator and the fluid pipe is used when transporting in the prefilled state. When a mischievous external force such as twisting is applied to the body or the fluid pressure actuator is attached to the vehicle body, internal stress is applied to the connection between the fluid pressure actuator and the fluid piping in order to force the fluid pressure actuator and the vehicle body side to be aligned. May give.
[0008]
Of these, in the former connection structure, the outer peripheral side of the ring portion of the stopper pin only engages with the pin hole of the pipe connection hole, and the upper side of the ring portion is opened without engaging with the connector. If an excessive external force is applied, the connector and the stopper pin are loosened and the sealing performance may be impaired, or the pipe connection hole may come off.
[0009]
In the latter connection structure, only one stopper pin is engaged with one position of the connector portion. Therefore, the connector portion is inclined with the stopper pin as a fulcrum by an external force or fluid pressure acting on the connection portion. There is. As a result, there is a possibility that the connector part may squeeze the inner peripheral surface of the pipe connection hole and the dusting powder is mixed into the fluid, or the seal ring interposed between the connector part and the pipe connection hole may be damaged early.
[0010]
Therefore, the present invention provides a fluid actuator that can effectively prevent the connector from coming off and loosening, mixing dust particles, and wearing the seal ring even if an unexpected external force or fluid pressure is applied to the connector. The purpose is to provide a pipe connection structure.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a boss portion protruding from a cylinder body of a fluid actuator, and forming a pipe connection hole communicating with a cylinder hole in the cylinder body at the boss portion. In the fluid actuator pipe connection structure in which the connector for fluid pipe connection inserted in the connection hole is prevented by a stopper pin , the pipe connection hole is formed on a surface perpendicular to the central axis of the boss portion. Two pin holes surrounding the inner peripheral surface of the boss portion are drilled in parallel with the central axis in between, both ends of both pin holes are opened in the outer peripheral surface of the boss portion, and the connector is connected to the pipe connection hole. An annular groove disposed on the same plane orthogonal to the central axis together with the pin hole when inserted is formed on the outer periphery of the connector, and the stopper pin 2 formed in a U shape in the pin hole. the shaft portion of the book, before Spanned the annular groove of the connector fitting inserted into the pipe connection hole with respective pin holes for inserting and retaining said connector rotatably and one end of the shaft portion projecting from the pin holes The feature is that the stopper portion of the stopper pin is formed by expanding the cut portion .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, each embodiment in which the fluid pressure actuator of the present invention is applied to a hydraulic master cylinder used in a vehicle clutch will be described with reference to the drawings.
[0014]
FIG. 1 to FIG. 3 show a first embodiment of the present invention. FIG. 1 is a sectional view of a main part showing a connection structure between a hydraulic master cylinder and piping. FIG. 2 is a sectional front view of the hydraulic master cylinder. 3 is a cross-sectional view taken along the line III-III in FIG.
[0015]
A hydraulic master cylinder 1 for a clutch is provided with a bottomed cylinder hole 3 with one end opened in a horizontally long cylinder body 2 fixed to a vehicle body, and a piston 4 is fluid-tight and movable in the cylinder hole 3. A hydraulic chamber 5 is defined between the piston 4 and the bottom wall of the cylinder hole 3.
[0016]
A concave portion 4a is formed in a spherical shape on the rear end surface of the piston 4, and the spherical head portion 6a of the push rod 6 is accommodated in the concave portion 4a, and a clutch pedal connected to the proximal end of the push rod 6 is operated by stepping. Then, the push rod 6 moves forward in the direction of the hydraulic master cylinder 1 and pushes the piston 4 toward the bottom of the cylinder hole 3 to increase the pressure of the hydraulic fluid in the hydraulic chamber 5.
[0017]
A boss portion 7 projects from the upper end of the hydraulic pressure chamber 5, and the boss portion 7 has a small-diameter fluid flow hole 8 communicating with the hydraulic pressure chamber 5 and a large opening opening on the seat surface of the boss portion 7. A pipe connection hole 9 having a diameter is continuously provided. A connector 11 of a fluid pipe 10 connected to a separate slave cylinder disposed in the vicinity of the clutch is fitted into the pipe connection hole 9, and the connector 11 is rotated to the pipe connection hole 9 using a stopper pin 12. It prevents it from coming off.
[0018]
In the boss portion 7, two pin holes 13 and 13 are formed in parallel on the surface S perpendicular to the central axis O with the central axis O sandwiched between the inner peripheral surfaces of the pipe connection holes 9. Thus, both ends of the pin holes 13 are opened on the outer peripheral surface 7 a of the boss portion 7.
[0019]
The connector 11 has a large-diameter portion 11a for connecting the fluid pipe 10, a medium-diameter portion 11b inserted into the pipe connection hole 9, and a small-diameter portion 11c inserted into the fluid flow hole 8. A fluid pipe 10 is attached to the large diameter portion 11a using a fixing bolt 14, and a communication hole communicating with the fluid pipe 10 and the fluid circulation hole 8 is provided on the central axis of the medium diameter portion 11b and the small diameter portion 11c. 11d is formed. An annular groove 11e is formed on the outer periphery of the medium diameter portion 11b, and when the connector 11 is inserted into the pipe connection hole 9, the annular groove 11e together with the pin hole 13 of the pipe connection hole 9 is the center of the boss portion 7. It is arranged on a surface S orthogonal to the axis O.
[0020]
The stopper pin 12 is formed by bending a metal bar into a U shape. The lengths of the two shaft portions 12 a and 12 a are longer than the pin holes 13 and 13 formed in the boss portion 7. Is formed long, and a cut portion 12b is formed at the end of one shaft portion 12a.
[0021]
The connector 11 is fitted and inserted between the pipe connection hole 9 and the bottom part of the medium diameter part 11b with a seal ring 15 interposed between the pipe connection hole 9 and the medium diameter part 11b. While being sealed, the fluid pressure chamber 5 communicates with the fluid flow hole 8, the communication hole 11 d, and the fluid pipe 10. When the connector 11 is thus inserted into the pipe connection hole 9, the annular groove 11 e of the connector 11 and the pin holes 13, 13 of the pipe connection hole 9 are aligned inside and outside on the surface S, and the pin hole 13, By inserting the shaft portions 12 a, 12 a of the stopper pin 12 from the opening 13, the shaft portions 12 a, 12 a are spanned over both the pin holes 13, 13 and the annular groove 11 e, and the connector 11 is turned to the pipe connection hole 9. It is prevented from coming off.
[0022]
The distal ends of the shaft portions 12a and 12a of the stopper pin 12 project outward from the boss portion 7 through the pin holes 13 and 13, and a wedge is applied to the cut portion 12b at the distal end of one shaft portion 12a to widen the cut portion 12b. The stopper pin 12 is prevented from coming off.
[0023]
As described above, in this embodiment, the connector 11 can be easily connected by simply inserting the U-shaped stopper pin 12 into the pin holes 13 and 13 formed in the boss portion 2a. Even when an unexpected external force is applied to the connecting portion between the hydraulic master cylinder 1 and the fluid piping 10 when transporting the fluid in a prefilled state connected to the fluid piping 10, the connector 11 and the stopper pin 12 are inclined from the normal connection state. It will never fall out.
[0024]
Further, the shaft portions 12a and 12a of the stopper pin 12 are inserted in parallel on the surface orthogonal to the center axis O of the boss portion 2a with the center axis O interposed therebetween, and the annular groove 11e of the connector 11 is inserted into the shaft portions 12a and 12a. Therefore, an unexpected external force such as a stepping stone is applied to the connecting portion between the hydraulic master cylinder 1 and the fluid pipe 10 after the vehicle body is assembled, or the hydraulic pressure generated in the hydraulic chamber 5 during operation is applied. However, it is possible to effectively prevent the connector 11 from tilting. As a result, the connector 11 does not squeeze the inner peripheral surface of the pipe connection hole 9, so that there is no possibility that the scouring powder is mixed into the working fluid, and the seal ring 15 is worn out early due to the inclination of the connector 11. Also disappear.
[0025]
FIG. 4 is a cross-sectional view of an essential part showing a pipe connection structure according to the second embodiment of the present invention. The boss part 7 has a cylinder axis direction and the same on a surface perpendicular to the central axis O. Two pin holes 20, 20, 21, and 21 are formed in a direction orthogonal to each other so that the inner peripheral surface of the pipe connection hole 9 is straightened. Both ends of the pin holes 20, 20, 21, 21 are open to the outer peripheral surface 7 a of the boss portion 7, and the four pin holes 20, 20, 21, 21 on one surface orthogonal to the central axis O are formed. It looks like a square well beam.
[0026]
An annular groove 11e is formed on the outer periphery of the connector 11 as in the first embodiment. The combination of the pin holes 21, 21 orthogonal to the cylinder axis and the annular groove 11e is the same as in the first embodiment. A U-shaped stopper pin 12 is used, and a combination of the pin holes 20 and 20 in the cylinder axial direction and the annular groove 11e has a stopper pin 22 shorter than the distance between the shaft portions 12a and 12a of the stopper pin 12. 22 is used.
[0027]
To connect the connector 11, first, two short stopper pins 22, 22 are inserted into the pin holes 20, 20, and the stopper pins 22, 22 are passed over the pin holes 20, 20 and the central portion of the annular groove 11e, Next, the shaft portions 12a, 12a of the U-shaped stopper pin 12 are inserted into the pin holes 21, 21 in the same manner as in the first embodiment, and the shaft portions 12a, 12a are inserted into both the pin holes 21, 21 and the annular groove 11e. Hang over. The two short stopper pins 22 and 22 are disposed between the shaft portions 12a and 12a of the U-shaped stopper pin 12, and the shaft portions 12a and 12a of the stopper pin 12, the stopper pins 22 and 22, and the annular groove 11e. The four abutting portions A with the innermost portion are positioned at equal intervals of 90 degrees in the circumferential direction of the annular groove 11e.
[0028]
The U-shaped stopper pin 12 is prevented from coming off by spreading the cut portion 12b of one shaft portion 12a with a wedge, and thereby, the stopper pin 22 disposed between the shaft portions 12a and 12a of the stopper pin 12. , 22 are also retained.
[0029]
As described above, in this embodiment, the four contact portions A of the shaft portions 12a and 12a and the stopper pins 22 and 22 of the stopper pin 12 and the annular groove 11e are equally spaced in the circumferential direction of the annular groove 11e. Since the connector 11 is set so as to be positioned, the connector 11 can be evenly supported by the stopper pins 12, 22, and 22. As in the first embodiment, the hydraulic pressure generated in the hydraulic chamber 5 during operation and the cylinder Even if an unexpected external force is applied to the body 2 or the boss 7, the connector 11 is effectively prevented from coming off and tilted, and the sealing performance is kept good. Wear can be well prevented.
[0032]
【The invention's effect】
As described above, according to the present invention, the connector can be easily connected simply by inserting the stopper pin into the pin hole of the boss portion, and when the fluid pressure actuator is transported in a prefilled state connected to the fluid pipe. In addition, even if an unexpected external force is applied to the connection portion between the fluid pressure actuator and the fluid piping, the connector and the stopper pin do not tilt or fall off from the normal connection state.
[0033]
In addition, since the multiple shafts of the stopper pin support the outer periphery of the connector evenly, an unexpected external force such as stepping stones is applied to the connection between the fluid pressure actuator and the fluid piping after the vehicle body is assembled, Even if the hydraulic pressure generated in the hydraulic chamber of the actuator acts, the connector can be effectively prevented from tilting. As a result, the connector does not squeeze the inner peripheral surface of the pipe connection hole, so that there is no possibility that the scouring powder is mixed into the working fluid, and the seal ring is not worn out at an early stage due to the inclination of the connector.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a connection structure between a hydraulic master cylinder for clutches and piping showing a first embodiment of the present invention. FIG. 2 is a hydraulic master cylinder for clutches showing a first embodiment of the present invention. Fig. 3 is a cross-sectional front view of Fig. 3. Fig. 4 is a cross-sectional view of III-III in Fig. 1; Explanation】
DESCRIPTION OF SYMBOLS 1 ... Hydraulic master cylinder (fluid pressure actuator of this invention), 2 ... Cylinder body, 3 ... Cylinder hole, 4 ... Piston, 5 ... Hydraulic pressure chamber, 7 ... Boss part, 7a ... Outer peripheral surface of boss part 7, 8 ... fluid flow hole, 9 ... pipe connection hole, 10 ... fluid pipe, 11 ... connector, 11e ... annular groove, 12, 22 ... stopper pin, 12a ... leg portion of stopper pin 12, 13, 20, 21 ... pin hole, 15 ... seal ring, O ... central axis of the boss portion 7, A ... contact portion between the stopper pins 12, 22 and the annular groove 11e

Claims (1)

流体式アクチュエータのシリンダボディにボス部を突設して、該ボス部に前記シリンダボディ内部のシリンダ孔と連通する配管接続孔を形成し、該配管接続孔内部に嵌挿した流体配管接続用のコネクタをストッパピンにて抜け止めする流体式アクチュエータの配管接続構造において、前記ボス部には、その中心軸と直交する面上に、前記配管接続孔の内周面をえぐる2本のピン孔を前記中心軸を挟んで平行に穿設し、両ピン孔の両端を、前記ボス部の外周面に開口させるとともに、前記コネクタを前記配管接続孔へ嵌挿した際に前記ピン孔と共に前記中心軸と直交する同一面上に配設される環状溝を、前記コネクタの外周に形成し、前記ピン孔にU字状に形成した前記ストッパピンの2本の軸部を、前記ピン孔にそれぞれ挿通すると共に前記配管接続孔に嵌挿した前記コネクタの環状溝に掛け渡して前記コネクタを回動自在に抜け止めし、かつ、前記ピン孔から突出する前記軸部の一方の端部の切込み部を広げてストッパピンの抜け止め部を形成したことを特徴とする流体式アクチュエータの配管接続構造。A boss is projected from the cylinder body of the fluid actuator to form a pipe connection hole communicating with the cylinder hole inside the cylinder body. The fluid connection pipe is inserted into the pipe connection hole. In the pipe connection structure of the fluid actuator that prevents the connector from coming off with a stopper pin, the boss portion has two pin holes on the inner surface of the pipe connection hole on the surface orthogonal to the central axis. The central axis is drilled in parallel, both ends of both pin holes are opened to the outer peripheral surface of the boss portion, and the central axis together with the pin holes when the connector is inserted into the pipe connection hole An annular groove arranged on the same plane orthogonal to the connector is formed on the outer periphery of the connector, and the two shaft portions of the stopper pin formed in a U shape in the pin hole are respectively inserted into the pin holes. said while Spanned the annular groove of the connector fitted to the tube connecting hole and retaining said connector rotatably and spread the cut portions of the one end portion of the shaft portion projecting from the pin hole stopper A fluid actuator piping connection structure, characterized in that a pin retaining portion is formed .
JP32788099A 1999-11-18 1999-11-18 Piping connection structure of fluid actuator Expired - Lifetime JP3993351B2 (en)

Priority Applications (1)

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JP32788099A JP3993351B2 (en) 1999-11-18 1999-11-18 Piping connection structure of fluid actuator

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Application Number Priority Date Filing Date Title
JP32788099A JP3993351B2 (en) 1999-11-18 1999-11-18 Piping connection structure of fluid actuator

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JP3993351B2 true JP3993351B2 (en) 2007-10-17

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Publication number Priority date Publication date Assignee Title
JP4574074B2 (en) * 2001-07-09 2010-11-04 日信工業株式会社 Piping connection structure of fluid actuator
JP4693756B2 (en) * 2006-11-29 2011-06-01 日立建機株式会社 Joint attachment / detachment device
JP6292849B2 (en) 2013-11-29 2018-03-14 日立オートモティブシステムズ株式会社 Cylinder device manufacturing method
JP7083153B2 (en) * 2018-03-29 2022-06-10 リューベ株式会社 Fluid piping member

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