JPH06227386A - Jumping adjusting method of assistor - Google Patents

Jumping adjusting method of assistor

Info

Publication number
JPH06227386A
JPH06227386A JP5034687A JP3468793A JPH06227386A JP H06227386 A JPH06227386 A JP H06227386A JP 5034687 A JP5034687 A JP 5034687A JP 3468793 A JP3468793 A JP 3468793A JP H06227386 A JPH06227386 A JP H06227386A
Authority
JP
Japan
Prior art keywords
end surface
valve plunger
booster
valve
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5034687A
Other languages
Japanese (ja)
Other versions
JP3289741B2 (en
Inventor
Shintaro Uyama
真太郎 宇山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jidosha Kiki Co Ltd
Original Assignee
Jidosha Kiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jidosha Kiki Co Ltd filed Critical Jidosha Kiki Co Ltd
Priority to JP03468793A priority Critical patent/JP3289741B2/en
Publication of JPH06227386A publication Critical patent/JPH06227386A/en
Application granted granted Critical
Publication of JP3289741B2 publication Critical patent/JP3289741B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

PURPOSE:To provide stepless and accurate adjustment by forming a recessed part on the rear-side end surface of a first member for constituting a valve plunger so that the cutting remaining is not caused on the end surface, thus enabling it to be incorporated in an assistor without interposing a shim. CONSTITUTION:A valve body 2 is slidably provided inside a shell 1, and a valve plunger 7 is slidably fitted in the valve body 2. The valve plunger 7 is made up of a cylindrical first member 8 that is positioned on the front side, and a second member 9 that is abutted thereon from the rear side. It is so contrived that a prescribed jumping value can be obtained by cutting the rear- side end surface 8a of the first member 8 by a prescribed amount for shortening the length, so that the clearance between the first member and a reaction disk 10 an be adjusted. A recessed part 8e is formed on the rear-side end surface 8a, therefore, when cutting is carried out for adjustment, no projection due to the cutting remaining is caused on the end surface 8a. Thus, after completion of cutting, the first member 8 can be immediately incorporated in an assistor, and the dimension can be steplessly adjusted without interposing a shim.

Description

【発明の詳細な説明】Detailed Description of the Invention

【産業上の利用分野】本発明は倍力装置のジャンピング
調整方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper adjusting method for a booster.

【従来の技術】従来、倍力装置として、シェル内に摺動
自在に設けたバルブボディと、上記バルブボディの貫通
孔に摺動自在に嵌合されるとともに入力軸に連動する弁
プランジャと、上記バルブボディに基部を摺動自在に取
り付けられて上記弁プランジャに対向させた出力軸と、
出力軸の基部と弁プランジャとの間に介在させたリアク
ションディスクとを備え、上記出力軸に作用する出力の
反力を上記リアクションディスクおよび弁プランジャを
介して入力軸に伝達するように構成し、また、上記弁プ
ランジャを、フロント側の端面が上記リアクションディ
スクに当接する第１部材と、この第１部材のリヤ側に位
置し、かつ第１部材のリヤ側の端面に当接する第２部材
とから構成したものは知られている。そして、このよう
な従来の倍力装置は、差圧が発生していない非作動状態
では、リアクションディスクと弁プランジャの先端（第
１部材の先端）との間に僅かな間隙が維持されており、
差圧が発生して倍力装置が作動されると、上記リアクシ
ョンディスクが弁プランジャ側へ変形して、出力軸に作
用する出力の反力が入力軸に伝達される。そして、この
両部材が当接するまでに一時的に急激な出力上昇が見ら
れ、それは一般にジャンピングと称されている。ところ
で、従来、同一寸法となるように製造した倍力装置であ
っても、各倍力装置によって僅かづつ寸法誤差が生じる
ので、各倍力装置のジャンピング値を一定にするために
は、各倍力装置ごとにジャンピング値の調整が必要にな
る。そのため、従来では、各倍力装置ごとに弁プランジ
ャの軸方向寸法を調整して、作動開始時におけるリアク
ションディスクの端面と弁プランジャのフロント側端面
との間隔を調整するようにしていた。より具体的には、
上記弁プランジャを構成する第１部材と第２部材との間
にシムを介在させ、そのシムの枚数によって弁プランジ
ャ全体の軸方向寸法を調整してジャンピング値の調整を
行っていた。2. Description of the Related Art Conventionally, as a booster, a valve body slidably provided in a shell, a valve plunger slidably fitted in a through hole of the valve body and interlocking with an input shaft, An output shaft having a base portion slidably attached to the valve body and facing the valve plunger,
A reaction disc interposed between the base of the output shaft and the valve plunger, the reaction force of the output acting on the output shaft is configured to be transmitted to the input shaft via the reaction disc and the valve plunger, The valve plunger includes a first member whose front end surface abuts on the reaction disc, and a second member which is located on the rear side of the first member and abuts a rear end surface of the first member. It is known to be composed of. In such a conventional booster, a slight gap is maintained between the reaction disc and the tip of the valve plunger (tip of the first member) in a non-operating state where no differential pressure is generated. ,
When a pressure difference is generated and the booster is operated, the reaction disc is deformed toward the valve plunger side, and the reaction force of the output acting on the output shaft is transmitted to the input shaft. Then, a sudden and sudden increase in output is observed before the two members come into contact with each other, which is generally called jumping. By the way, conventionally, even in the boosters manufactured to have the same size, each booster causes a slight dimensional error. Therefore, in order to keep the jumping value of each booster constant, It is necessary to adjust the jumping value for each force device. Therefore, conventionally, the axial dimension of the valve plunger has been adjusted for each booster to adjust the distance between the end face of the reaction disc and the front end face of the valve plunger at the start of operation. More specifically,
A shim is interposed between the first member and the second member constituting the valve plunger, and the axial dimension of the entire valve plunger is adjusted according to the number of the shims to adjust the jumping value.

【発明が解決しようとする課題】しかるに、上述したシ
ムを用いた従来の調整方法においては、シムの枚数単位
の段階的な弁プランジャの軸方向寸法の調整になり、し
たがって、精密なジャンピング値の調整が困難であっ
た。このような欠点を解消するためには、例えば弁プラ
ンジャの第１部材を予め長めに製造した後、該第１部材
を旋盤に固定してそのリヤ側端部をバイトで切削するこ
とで弁プランジャの軸方向寸法を調整すればよい。この
ような調整方法によれば、倍力装置のジャンピング値を
無段階で調整することができる。しかしながら、この調
整方法においては、第１部材のリヤ側端部をバイトで切
削完了した時に、そのリヤ側端面の中心にバイトの先端
による切削洩れの突起が残るようになる。このような突
起が存在すると弁プランジャの軸方向寸法が不正確にな
るため、上記バイトによる切削完了後にリヤ側端面に残
った突起を除去しなければならず、その作業が煩雑なも
のとなる。However, in the conventional adjusting method using the shim described above, the axial dimension of the valve plunger is adjusted stepwise in units of the number of shims, and therefore, the precise jumping value can be adjusted. It was difficult to adjust. In order to eliminate such a defect, for example, after the first member of the valve plunger is manufactured in advance with a long length, the first member is fixed to a lathe and the rear side end portion thereof is cut with a cutting tool. It is sufficient to adjust the axial dimension of. According to such an adjusting method, the jumping value of the booster can be adjusted steplessly. However, in this adjusting method, when the rear side end of the first member is completely cut by the cutting tool, a projection of cutting leakage due to the tip of the cutting tool remains at the center of the rear side end surface. If such a protrusion is present, the axial dimension of the valve plunger becomes inaccurate. Therefore, the protrusion remaining on the rear end face must be removed after the cutting with the cutting tool is completed, and the work becomes complicated.

【課題を解決するための手段】このような事情に鑑み、
本発明は、シェル内に摺動自在に設けたバルブボディ
と、上記バルブボディの貫通孔に摺動自在に嵌合される
とともに入力軸に連動する弁プランジャと、上記バルブ
ボディに基部を摺動自在に取り付けられて上記弁プラン
ジャに対向させた出力軸と、出力軸の基部と弁プランジ
ャとの間に介在させたリアクションディスクとを備え、
上記出力軸に作用する出力の反力を上記リアクションデ
ィスクおよび弁プランジャを介して入力軸に伝達するよ
うに構成し、また、上記弁プランジャを、フロント側の
端面が上記リアクションディスクに当接する第１部材
と、この第１部材のリヤ側に位置し、かつ第１部材のリ
ヤ側端面に当接する第２部材とから構成し、さらに、上
記第１部材のリヤ側の端部を所要量だけ切削して、該第
１部材の軸方向寸法を短縮し、作動開始時における第１
部材のフロント側の端面とリアクションディスクとの間
の間隙を調整して所定のジャンピング値が得られるよう
に構成した倍力装置のジャンピング調整方法であって、
上記第１部材におけるリヤ側端面の中心に予め凹部を形
成し、この第１部材におけるリヤ側の端部を所要量だけ
切削して所定のジャンピング値が得られるように構成し
た倍力装置のジャンピング調整方法を提供するものであ
る。[Means for Solving the Problems] In view of such circumstances,
The present invention relates to a valve body slidably provided in a shell, a valve plunger slidably fitted in a through hole of the valve body and interlocking with an input shaft, and a base portion slidable on the valve body. An output shaft freely attached to face the valve plunger, and a reaction disk interposed between the base of the output shaft and the valve plunger,
A first reaction device is configured such that a reaction force of an output acting on the output shaft is transmitted to the input shaft via the reaction disc and the valve plunger, and the valve plunger has a front end face abutting on the reaction disc. And a second member located on the rear side of the first member and in contact with the rear side end surface of the first member, and further cutting the rear end of the first member by a required amount. Then, the axial dimension of the first member is shortened, and the first
A jumping adjustment method for a booster configured to adjust a gap between a front end surface of a member and a reaction disk to obtain a predetermined jumping value,
A jumper for a booster in which a recess is formed in the center of the rear end surface of the first member in advance, and the rear end of the first member is cut by a required amount to obtain a predetermined jumping value. It provides an adjustment method.

【作用】このような調整方法によれば、第１部材におけ
るリヤ側端面の中心に凹部が存在するので、ジャンピン
グの調整のために第１部材のリヤ側端部をバイトで切削
しても、該第１部材のリヤ側端面に切削残りの突起が生
じない。そのため、第１部材のリヤ側端部の切削が完了
したら、該第１部材を直ちに倍力装置に組み込むことが
でき、それによって、所定のジャンピング値を得ること
ができる。そのため、第１部材と第２部材との間にシム
を介在させてジャンピング値を調整していた従来と比較
すると、無段階で、より精密なジャンピングの調整を行
うことができる。According to such an adjusting method, since the concave portion exists at the center of the rear end surface of the first member, even if the rear end portion of the first member is cut with the cutting tool for adjusting the jumping, No protrusions due to cutting residue are formed on the rear end surface of the first member. Therefore, when cutting of the rear end of the first member is completed, the first member can be immediately incorporated into the booster, and thereby a predetermined jumping value can be obtained. Therefore, as compared with the conventional case in which the shimming is interposed between the first member and the second member to adjust the jumping value, more precise jumping adjustment can be performed in a stepless manner.

【実施例】以下図示実施例について本発明を説明する
と、図１はタンデムブレーキ倍力装置の内部を示したも
のであり、シェル１内には略円筒状のバルブボディ２を
摺動自在に設けている。バルブボディ２内には、真空弁
３と大気弁４とから構成される従来周知の弁機構５を設
けてあり、この弁機構５は入力軸６に連動して作動され
るようになっている。上記弁機構５の一部を構成する弁
プランジャ７は、バルブボディ２の軸方向に穿設した段
付の貫通孔２Ａに摺動自在に嵌合されるとともに、上記
入力軸６の先端部に連結されている。この弁プランジャ
７は、軸方向フロント側に位置する略円柱状の第１部材
８と、この第１部材８にリヤ側から当接させた第２部材
９とから構成している。第２部材９におけるリヤ側端部
に上述した入力軸６の先端を連結するとともに、この第
２部材９のリヤ側端部によって上記大気弁４を構成する
弁座９ａを構成している。第２部材９のフロント側の外
周部９ｂは円柱状に形成してあり、このフロント側の外
周部９ｂを上記貫通孔２Ａにおける中央位置の小径孔２
ａに摺動自在に貫通させて、フロント側の端面９ｃを大
径孔２ｂ内に位置させている。大径孔２ｂには上記第１
部材８が摺動自在に嵌合してあり、この第１部材８のリ
ヤ側端面８ａに第２部材９のフロント側端面９ｃを当接
させている。第１部材８のフロント側端面８ｂは、フロ
ント側にむけて膨出させて断面を円弧状に形成してあ
り、隣接位置のリアクションディスク１０に対向させて
いる。また、円柱状とした第１部材８の本体部８ｃは、
上述のように大径孔２ｂに嵌合しているが、この本体部
８ｃのリヤ側には該本体部８ｃよりも縮径した小径部８
ｄを形成している。そして、この小径部８ｄの端面が第
１部材８全体のリヤ側端面８ａとなっており、上述した
ように第２部材９のフロント側端面９ｃと当接してい
る。次に、上記第１部材８と対向するリアクションディ
スク１０は、出力軸１１の基部凹陥部１１ａに収納され
た状態において、その基部凹陥部１１ａの底部とバルブ
ボディ２に設けた環状突起２Ｂの端面との間に介在され
ている。そして、差圧が発生してない倍力装置の非作動
状態では、リアクションディスク１０と上記第１部材８
のフロント側端面８ｂとの間に僅かな間隙が維持されて
いる。これに対して、入力軸６が前進され差圧が発生す
る倍力装置の作動時には、リアクションディスク１０が
上記第１部材８側へ変形し間隙が解消されて、リアクシ
ョンディスク１０と上記第１部材８のフロント側端面８
ｂとが当接するので、出力軸１１に作用する出力の反力
が上記リアクションディスク１０と弁プランジャ７とを
介して入力軸６に伝達される。このリアクションディス
ク１０と第１部材８のフロント側端面８ｂとが当接する
までの間、一時的にサーボ比が急上昇することは知られ
ており、このサーボ比の急上昇は一般にジャンピングと
称されている。そして、このジャンピングの後、所定の
サーボ比で出力が上昇する。ところで、上述した構成の
倍力装置を製造する時には、その構成部材ごとにわずか
づつ製造誤差が生じるので、各倍力装置について所定の
ジャンピング値を得るために、それぞれの倍力装置ごと
にジャンピング値の調整作業が必要になる。そして、従
来では次のようにして調整で行っている。すなわち、上
記第１部材８と第２部材９との間にシムを介在させ、そ
のシムの枚数によって弁プランジャ７全体の軸方向寸法
を調整するようにしていた。このように両部材８，９間
にシムを介在させることで、倍力装置の作動開始時にお
けるリアクションディスク１０と弁プランジャ７（第１
部材８）の先端との間隙を調整して、目的とする所定の
ジャンピング値を得るようにしていた。しかしながら、
このような従来の調整方法においては、シムの枚数ごと
に段階的な調整となるので、精密なジャンピング値の調
整が困難であった。このような欠点を解消するために
は、例えば、上記弁プランジャ７の第１部材８を旋盤に
固定して、そのリヤ側端部（小径部８ｄのリヤ側端部）
をバイトで切削し、軸方向の寸法を調整すればよい。そ
れによって、弁プランジャ７全体の軸方向寸法を調整す
ることができる。しかしながら、このような調整方法に
よれば、第１部材８のリヤ側端部をバイトで切削完了し
た時に、そのリヤ側端面の中心にバイトの先端による切
削洩れの突起が残ることになる。このような突起が存在
すると、弁プランジャ７の軸方向寸法が不正確になるた
め、上記バイトによる切削完了後に第１部材８のリヤ側
端面に残った突起を除去する必要があり、その作業が煩
雑なものとなる。本実施例は、このような欠点を解消す
るために、第１部材８のリヤ側端面の中心、つまり小径
部８ｄの端面の中心に凹部としての有底孔８ｅを予め形
成するようにしてあり、この小径部８ｄのリヤ側端部を
バイトで切削することによりジャンピングの調整を行う
ようにしたものである。また、小径部８ｄの軸方向寸法
は、フロント側端面８ｂの膨出量よりも大きく設定して
いる。このように構成することで、倍力装置を組付けた
際に、第１部材８が大径孔２ｂ内に逆方向に嵌合された
としても、サーボ比の特性線図によって確認した際に上
記第１部材８が大径孔２ｂ内に逆組付けとなっているこ
とを容易に判定することが出来る。他方、小径部８ｄの
外径は、第２部材９のフロント側外周部９ｂの外径より
も大きく設定してあり、図２に拡大して示すように、第
２部材９のフロント側端面９ｃの外周縁は曲面となるよ
うに面取している。したがって、倍力装置の組付け完了
後の状態で、図２に示すように、前進された第２部材９
が僅かに傾斜している状態において、第２部材９のフロ
ント側端面９ｃの外周縁が第１部材８のリヤ側端面８ａ
に当接したとしても、フロント側端面９ｃの外周縁は滑
らかな曲面となっているので、この外周縁と第１部材８
のリヤ側端面８ａとがスティックすることを防止でき
る。これに対して、第２部材９のフロント側端面９ｃの
外周縁が曲面ではなくと鋭角となっている場合には、フ
ロント側端面９ｃの外周縁と第１部材８のリヤ側端面８
ａとがスティックを起こす様になる。上述のように構成
した本実施例の弁プランジャ７を倍力装置に組み込む際
には、次のようにしてジャンピング値の調整を行う。こ
こで、最終的に倍力装置を組付けた際に得ようとするジ
ャンピング値をＪ１とする。先ず、倍力装置に実際に組
み込む予定の第１部材８、第２部材以外に、所定の軸方
向寸法を備えたマスターピースとしての第１部材８を予
め用意する。そして、実際に組み込む予定の第１部材８
に代わりに、マスターピースとしての第１部材８と第２
部材とを倍力装置に組み込んで全体を仮組付けする。そ
して、この仮組付けした倍力装置のサーボ比を計測し
て、この時のジャンピング値Ｊ２を検出する。次に、上
述した計測によって得たジャンピング値Ｊ２を、最終的
に得ようとするジャンピング値Ｊ１と比較して、最終的
に得ようとするジャンピング値Ｊ１が得られる第１部材
８の軸方向長さＬ１を求めるとともに、実際に倍力装置
に組み込む予定の第１部材８の軸方向長さＬ２から上記
Ｌ１を減じて、第１部材８の軸方向長さＬ２を短縮すべ
き寸法Ｌ３を求める。本実施例では、倍力装置に組み込
む予定の第１部材８の軸方向長さを長めに製造している
ので、上述のように短縮すべき寸法Ｌ３を求めたら、そ
の寸法Ｌ３分だけ倍力装置に組み込む予定の第１部材８
の小径部８ｄをバイトで切削する。これによって、第１
部材８の軸方向寸法を、上述した最終的に得ようとする
ジャンピング値Ｊ１が得られる寸法に短縮することがで
きる。そして、本実施例では、第１部材８のリヤ側端面
８ａに凹部としての有底孔８ｅを形成しているので、上
述のようにバイトで第１部材８の小径部８ｄを切削した
後に、リヤ側端面８ａの中心にバイトの先端による切削
残りが生じない。したがって、この後、直ちに、仮組付
けした倍力装置からマスタピースとしての第１部材８を
取り出し、それの代わりに、切削完了した上記第１部材
８を倍力装置に組み込めばよい。上述のように、本実施
例では、所定長さを備えたマスターピースとしての第１
部材８を用意し、各倍力装置ごとに上述した要領で所定
のジャンピング値が得られるように調整を行うようにし
ている。したがって、両部材８，９の間にシムを介在さ
せていた従来技術に比較して、無段階で精密なジャンピ
ング値の設定を行うことができる。 （第２実施例）次に図３によって本発明の第２実施例を
説明すると、この第２実施例では、第１部材１０８にお
ける小径部１０８ｄを縮径するとともに、その小径部１
０８ｄをリヤ側に新調させて、バルブボディ１０２の小
径孔１０２ａに摺動自在に嵌合させている。他方、第２
部材１０９は、第１部材１０８における小径部１０８ｄ
を軸方向に伸ばした分だけ軸方向寸法を短縮している。
そして、相互に当接する第１部材１０８のリヤ側端面１
０８ａと第２部材１０９のフロント側端面１０９ｃと
は、上記小径孔１０２ａ内で摺動するようにしている。
その他の構成は、上記第１実施例と同じであり、第１実
施例と対応する各部材には、それぞれ１００を加算した
部材番号を付している。このような第２実施例の構成で
あっても上記第１実施例と同様の作用効果を得ることが
できる。また、小径部１０８ｄを上記第１実施例のもの
よりも縮径して小径孔１０２ａに嵌合しているので、仮
に第１部材１０８を大径孔２ｂに逆方向に組み込んだと
しても、その組み込み時に、きわめて容易に逆方向であ
ることを判定することができる。なお、上記実施例で
は、マスターピースとしての第１部材８を用意してお
き、調整対象となる各倍力装置について、マスターピー
スとしての第１部材８を組み込んでから、各倍力装置に
実際に組み込む予定の第１部材８の短縮量を求めている
が、次のようにしても良い。すなわち、先ず、倍力装置
に組み込む予定の第１部材８を倍力装置に組み込んでか
ら、その場合のジャンピング値を求め、次に、このジャ
ンピング値と、最終的に得ようとするジャンピング値と
を比較して、第１部材８の短縮量を求める。次に、倍力
装置から第１部材８を取り出して、上記求めた短縮量だ
け第１部材８をバイトで切削してから、再度倍力装置に
組み込むようにしても良い。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 shows the inside of a tandem brake booster, in which a shell 1 is provided with a substantially cylindrical valve body 2 slidably. ing. A conventionally well-known valve mechanism 5 including a vacuum valve 3 and an atmosphere valve 4 is provided in the valve body 2, and the valve mechanism 5 is operated in conjunction with an input shaft 6. . The valve plunger 7 forming a part of the valve mechanism 5 is slidably fitted in a stepped through hole 2A formed in the valve body 2 in the axial direction, and at the tip of the input shaft 6. It is connected. The valve plunger 7 includes a substantially cylindrical first member 8 located on the front side in the axial direction, and a second member 9 that abuts the first member 8 from the rear side. The tip of the input shaft 6 is connected to the rear end of the second member 9, and the rear end of the second member 9 constitutes a valve seat 9a that constitutes the atmosphere valve 4. The outer peripheral portion 9b on the front side of the second member 9 is formed in a cylindrical shape, and the outer peripheral portion 9b on the front side is formed into the small-diameter hole 2 at the central position in the through hole 2A.
The end face 9c on the front side is located in the large diameter hole 2b by slidably penetrating through a. In the large diameter hole 2b, the above first
The member 8 is slidably fitted, and the rear end surface 8a of the first member 8 is in contact with the front end surface 9c of the second member 9. The front side end surface 8b of the first member 8 is bulged toward the front side to have a circular arc-shaped cross section, and faces the reaction disc 10 at the adjacent position. In addition, the main body portion 8c of the cylindrical first member 8 is
Although fitted into the large diameter hole 2b as described above, the small diameter portion 8 having a diameter smaller than that of the main body portion 8c is provided on the rear side of the main body portion 8c.
forming d. The end surface of the small diameter portion 8d is the rear end surface 8a of the first member 8 as a whole, and is in contact with the front end surface 9c of the second member 9 as described above. Next, the reaction disc 10 facing the first member 8 is stored in the base recess 11a of the output shaft 11, and the bottom surface of the base recess 11a and the end surface of the annular protrusion 2B provided on the valve body 2 are covered. Is intervened between. Then, in the non-operating state of the booster in which no differential pressure is generated, the reaction disk 10 and the first member 8 are
A slight gap is maintained between the front end face 8b and the front end face 8b. On the contrary, when the input shaft 6 is moved forward and the booster operates to generate a differential pressure, the reaction disk 10 is deformed toward the first member 8 side and the gap is eliminated, and the reaction disk 10 and the first member are removed. Front end face 8
Since they abut with each other, the reaction force of the output acting on the output shaft 11 is transmitted to the input shaft 6 via the reaction disk 10 and the valve plunger 7. It is known that the servo ratio temporarily increases rapidly until the reaction disk 10 and the front side end surface 8b of the first member 8 come into contact with each other, and this rapid increase in servo ratio is generally called jumping. . Then, after this jumping, the output increases at a predetermined servo ratio. By the way, when manufacturing the booster having the above-mentioned configuration, a slight manufacturing error occurs for each component member, so in order to obtain a predetermined jumping value for each booster, the jumping value for each booster is to be obtained. Adjustment work is required. Then, conventionally, adjustment is performed as follows. That is, the shim is interposed between the first member 8 and the second member 9, and the axial dimension of the entire valve plunger 7 is adjusted by the number of the shims. By thus interposing the shims between the members 8 and 9, the reaction disc 10 and the valve plunger 7 (first
The gap with the tip of the member 8) is adjusted to obtain a desired predetermined jumping value. However,
In such a conventional adjustment method, since the adjustment is performed stepwise for each number of shims, it is difficult to precisely adjust the jumping value. In order to eliminate such a defect, for example, the first member 8 of the valve plunger 7 is fixed to a lathe, and its rear side end portion (the rear side end portion of the small diameter portion 8d) is fixed.
Can be cut with a cutting tool to adjust the axial dimension. Thereby, the axial dimension of the entire valve plunger 7 can be adjusted. However, according to such an adjusting method, when the rear end portion of the first member 8 is completely cut by the cutting tool, a projection of cutting leakage due to the tip of the cutting tool remains at the center of the rear end surface. If such a protrusion is present, the axial dimension of the valve plunger 7 becomes inaccurate. Therefore, it is necessary to remove the protrusion remaining on the rear end surface of the first member 8 after the cutting with the cutting tool is completed. It becomes complicated. In this embodiment, in order to eliminate such a drawback, a bottomed hole 8e as a recess is previously formed at the center of the rear end face of the first member 8, that is, the center of the end face of the small diameter portion 8d. The jumping is adjusted by cutting the rear end of the small diameter portion 8d with a cutting tool. Further, the axial dimension of the small diameter portion 8d is set to be larger than the bulging amount of the front end surface 8b. With this configuration, even when the first member 8 is fitted in the large-diameter hole 2b in the opposite direction when the booster is assembled, when the first member 8 is confirmed by the characteristic diagram of the servo ratio. It can be easily determined that the first member 8 is reversely assembled in the large diameter hole 2b. On the other hand, the outer diameter of the small-diameter portion 8d is set to be larger than the outer diameter of the front-side outer peripheral portion 9b of the second member 9, and as shown in an enlarged view of FIG. The outer peripheral edge of is chamfered so as to form a curved surface. Therefore, in the state after the assembly of the booster is completed, as shown in FIG.
Is slightly inclined, the outer peripheral edge of the front end surface 9c of the second member 9 is located at the rear end surface 8a of the first member 8.
Since the outer peripheral edge of the front-side end surface 9c is a smooth curved surface even if it abuts on the outer peripheral edge and the first member
It is possible to prevent the rear side end surface 8a of the sticker from sticking. On the other hand, when the outer peripheral edge of the front end surface 9c of the second member 9 is an acute angle instead of a curved surface, the outer peripheral edge of the front end surface 9c and the rear end surface 8 of the first member 8 are formed.
The a and the stick will start to stick. When the valve plunger 7 of the present embodiment configured as described above is incorporated in the booster, the jumping value is adjusted as follows. Here, J1 is a jumping value to be finally obtained when the booster is assembled. First, in addition to the first member 8 and the second member to be actually incorporated in the booster, the first member 8 as a master piece having a predetermined axial dimension is prepared in advance. Then, the first member 8 to be actually incorporated
Instead of the first member 8 and the second member
The member is assembled into a booster and the whole is temporarily assembled. Then, the servo ratio of the booster temporarily assembled is measured, and the jumping value J2 at this time is detected. Next, the jumping value J2 obtained by the above-described measurement is compared with the jumping value J1 to be finally obtained, and the jumping value J1 to be finally obtained is obtained in the axial length of the first member 8. The length L1 is obtained, and the above-mentioned L1 is subtracted from the axial length L2 of the first member 8 which is to be actually incorporated in the booster to obtain the dimension L3 in which the axial length L2 of the first member 8 should be shortened. . In this embodiment, since the axial length of the first member 8 which is to be incorporated in the booster is made longer, when the dimension L3 to be shortened is obtained as described above, the boosting is performed by the dimension L3. First member 8 to be incorporated in the device
The small diameter portion 8d of is cut with a cutting tool. By this, the first
The axial dimension of the member 8 can be shortened to the dimension at which the jumping value J1 to be finally obtained is obtained. In this embodiment, since the bottomed hole 8e as a recess is formed in the rear end surface 8a of the first member 8, after the small diameter portion 8d of the first member 8 is cut with the cutting tool as described above, No cutting residue is produced by the tip of the cutting tool at the center of the rear end face 8a. Therefore, immediately after this, the first member 8 as the master piece may be immediately taken out from the temporarily assembled booster, and instead of that, the cut first member 8 may be incorporated into the booster. As described above, in this embodiment, the first master piece having a predetermined length is used.
The member 8 is prepared, and adjustment is performed so that a predetermined jumping value can be obtained for each booster in the manner described above. Therefore, as compared with the prior art in which the shim is interposed between the two members 8 and 9, it is possible to set the jumping value more precisely without any step. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 3. In the second embodiment, the small diameter portion 108d of the first member 108 is reduced in diameter and the small diameter portion 1 is
08d is newly adjusted to the rear side and slidably fitted in the small diameter hole 102a of the valve body 102. On the other hand, the second
The member 109 is the small diameter portion 108d of the first member 108.
The axial dimension has been shortened by the amount that is extended in the axial direction.
Then, the rear-side end surface 1 of the first member 108 that abuts each other.
08a and the front end surface 109c of the second member 109 are adapted to slide within the small diameter hole 102a.
Other configurations are the same as those in the first embodiment, and each member corresponding to the first embodiment has a member number added with 100. Even with such a configuration of the second embodiment, the same operational effect as that of the first embodiment can be obtained. Further, since the small-diameter portion 108d is fitted into the small-diameter hole 102a with a diameter smaller than that of the first embodiment, even if the first member 108 is assembled in the large-diameter hole 2b in the reverse direction, At the time of installation, it is very easy to determine the reverse direction. In the above embodiment, the first member 8 as a master piece is prepared, and the first member 8 as the master piece is incorporated into each booster to be adjusted, and then the booster is actually incorporated into each booster. Although the expected shortening amount of the first member 8 is obtained, it may be performed as follows. That is, first, the first member 8 which is to be incorporated in the booster is incorporated in the booster, the jumping value in that case is obtained, and then the jumping value and the jumping value to be finally obtained And the shortening amount of the first member 8 is calculated. Next, the first member 8 may be taken out from the booster, and the first member 8 may be cut with a cutting tool by the shortened amount obtained above, and then the first member 8 may be incorporated into the booster again.

【発明の効果】以上のように本発明によれば、従来に比
較して、無段階で、より精密なジャンピングの調整を行
うことができるという効果が得られる。As described above, according to the present invention, it is possible to obtain the effect that the jumping adjustment can be performed more steplessly and more precisely than in the conventional case.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を示す断面図FIG. 1 is a sectional view showing an embodiment of the present invention.

【図２】図１の要部の異なる状態を示す拡大図FIG. 2 is an enlarged view showing a state in which a main part of FIG. 1 is different.

【図３】本発明の他の実施例を示す断面図FIG. 3 is a sectional view showing another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ シェル ２ バルブボディ ７ 弁プランジャ ８ 第１部材 ８ａ リヤ側の端面 ８ｅ 有底孔（凹部） ９ 第２部材 １０ リアクションディ
スク １１ 出力軸1 Shell 2 Valve Body 7 Valve Plunger 8 First Member 8a Rear End Face 8e Bottomed Hole (Concave) 9 Second Member 10 Reaction Disc 11 Output Shaft

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 シェル内に摺動自在に設けたバルブボデ
ィと、上記バルブボディの貫通孔に摺動自在に嵌合され
るとともに入力軸に連動する弁プランジャと、上記バル
ブボディに基部を摺動自在に取り付けられて上記弁プラ
ンジャに対向させた出力軸と、出力軸の基部と弁プラン
ジャとの間に介在させたリアクションディスクとを備
え、上記出力軸に作用する出力の反力を上記リアクショ
ンディスクおよび弁プランジャを介して入力軸に伝達す
るように構成し、また、上記弁プランジャを、フロント
側の端面が上記リアクションディスクに当接する第１部
材と、この第１部材のリヤ側に位置し、かつ第１部材の
リヤ側端面に当接する第２部材とから構成し、さらに、
上記第１部材のリヤ側の端部を所要量だけ切削して、該
第１部材の軸方向寸法を短縮し、作動開始時における第
１部材のフロント側の端面とリアクションディスクとの
間の間隙を調整して所定のジャンピング値が得られるよ
うに構成した倍力装置のジャンピング調整方法であっ
て、 上記第１部材におけるリヤ側端面の中心に予め凹部を形
成し、この第１部材におけるリヤ側の端部を所要量だけ
切削して所定のジャンピング値が得られるように構成し
たことを特徴とする倍力装置のジャンピング調整方法。1. A valve body slidably provided in a shell, a valve plunger slidably fitted in a through hole of the valve body and interlocking with an input shaft, and a base portion sliding on the valve body. An output shaft movably attached to face the valve plunger and a reaction disc interposed between the base of the output shaft and the valve plunger are provided, and the reaction force of the output acting on the output shaft is applied to the reaction. The valve plunger is configured to be transmitted to the input shaft via a disc and a valve plunger, and the valve plunger is disposed on a first member whose front end surface abuts on the reaction disc and on a rear side of the first member. And a second member that comes into contact with the rear end surface of the first member, and
The rear end of the first member is cut by a required amount to reduce the axial dimension of the first member, and the gap between the front end surface of the first member and the reaction disc at the start of operation. Is a jumper adjusting method for a booster configured to obtain a predetermined jumping value by forming a recess in the center of the rear side end face of the first member in advance, and rearward side of the first member. A jumping adjusting method for a booster, characterized in that a predetermined jumping value is obtained by cutting an end portion of the device.
JP03468793A 1993-01-29 1993-01-29 Jumping adjustment method of booster Expired - Fee Related JP3289741B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03468793A JP3289741B2 (en) 1993-01-29 1993-01-29 Jumping adjustment method of booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03468793A JP3289741B2 (en) 1993-01-29 1993-01-29 Jumping adjustment method of booster

Publications (2)

Publication Number Publication Date
JPH06227386A true JPH06227386A (en) 1994-08-16
JP3289741B2 JP3289741B2 (en) 2002-06-10

Family

ID=12421310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03468793A Expired - Fee Related JP3289741B2 (en) 1993-01-29 1993-01-29 Jumping adjustment method of booster

Country Status (1)

Country Link
JP (1) JP3289741B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011088628A (en) * 2009-10-22 2011-05-06 Robert Bosch Gmbh Brake device with master cylinder and brake booster, eliminating push rod
WO2011161878A1 (en) * 2010-06-23 2011-12-29 ボッシュ株式会社 Negative-pressure booster device, brake system provided with said negative-pressure booster device, and method for manufacturing a plate plunger for a negative-pressure booster device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011088628A (en) * 2009-10-22 2011-05-06 Robert Bosch Gmbh Brake device with master cylinder and brake booster, eliminating push rod
WO2011161878A1 (en) * 2010-06-23 2011-12-29 ボッシュ株式会社 Negative-pressure booster device, brake system provided with said negative-pressure booster device, and method for manufacturing a plate plunger for a negative-pressure booster device
CN102947152A (en) * 2010-06-23 2013-02-27 博世株式会社 Negative-pressure booster device, brake system provided with said negative-pressure booster device, and method for manufacturing a plate plunger for a negative-pressure booster device
JP5395267B2 (en) * 2010-06-23 2014-01-22 ボッシュ株式会社 Negative pressure booster, brake system equipped with this negative pressure booster, and method of manufacturing plate plunger of negative pressure booster
CN102947152B (en) * 2010-06-23 2015-06-24 博世株式会社 Negative-pressure booster device, brake system provided with said negative-pressure booster device, and method for manufacturing a plate plunger for a negative-pressure booster device
US9533664B2 (en) 2010-06-23 2017-01-03 Bosch Corporation Vacuum booster, brake system equipped with the vacuum booster, and method of manufacturing plate plunger for vacuum booster

Also Published As

Publication number Publication date
JP3289741B2 (en) 2002-06-10

Similar Documents

Publication Publication Date Title
JP3354345B2 (en) Negative pressure booster
US5293808A (en) Vacuum brake power booster
JPH06227386A (en) Jumping adjusting method of assistor
KR20000065255A (en) Lifting type brake system with variable power ratio
JPH0885443A (en) Pneumatic booster
GB2074270A (en) Servo valves for brake boosters
US20070000378A1 (en) Negative pressure doubling device
JP2009529462A (en) Pneumatic brake booster
US6899010B2 (en) Pneumatic booster
JPS63258258A (en) Pneumatic booster
JPH08183447A (en) Valve plunger slip-out preventing structure in assistor
US5642652A (en) Booster
JPH04215558A (en) Brake booster
FR2804397A1 (en) METHOD FOR MANUFACTURING A CYLINDER MASTER COMPRISING AN ADJUSTMENT STEP AND MASTER CYLINDER OBTAINED BY SAID METHOD
US5233904A (en) Pneumatic brake booster with adjustable jump
JP2650214B2 (en) Negative pressure booster
JP2544623B2 (en) Break Buster
KR100362591B1 (en) Brake booster
JP2005313896A (en) Brake with booster having feeler provided with stud
JPH10230840A (en) Penumatic booster
US7121186B2 (en) Pneumatic servo unit, method for making same and device
JPH0616126A (en) Vacuum brake booster
JP3101981B2 (en) Reaction force transmission mechanism of booster
US5136769A (en) Method of evaluating a partially assembled brake booster
JP3765476B2 (en) Brake booster

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20020220

LAPS Cancellation because of no payment of annual fees