JP3647886B2

JP3647886B2 - Disc brake

Info

Publication number: JP3647886B2
Application number: JP11077593A
Authority: JP
Inventors: 隆佐野
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1993-05-12
Filing date: 1993-05-12
Publication date: 2005-05-18
Anticipated expiration: 2020-05-18
Also published as: JPH06323347A

Description

【０００１】
【産業上の利用分野】
本発明は、車両等の制動用に用いられるディスクブレーキに関する。
【０００２】
【従来の技術】
車両等の制動用に用いられるディスクブレーキとして、例えば実公昭６３−３６１７５号公報に記載されたものがある。このディスクブレーキは、ディスクの一面側に配置され車両の非回転の取付部に固定されるキャリアと、該キャリアにディスクの軸線方向に平行をなすよう取り付けられ、一端部がディスクの外周外方を越えて突出し、他端部がディスクに対し反対方向に突出するメインピンと、キャリアに、ディスクの軸線方向に平行をなしかつディスクに対し反対方向に突出するよう取り付けられた摺動案内ピンと、ディスクの一面側に対向配置される第一パッドと、ディスクの他面側に対向配置されるとともに、メインピンの他端側に車両前進時のディスク回転方向先端側が案内支持される第二パッドと、メインピンの一端部側と摺動案内ピンとに摺動自在に支持されるとともに、第一パッドおよび第二パッドの、車両前進時のディスク回転方向後端側を案内支持する支持ピンがディスク軸線方向に平行にディスクの外周外方を跨いで設けられ、両パッドをそれぞれのディスクに対し反対側から挾持可能なキャリパとを有している。そして、キャリアの、車両前進時のディスク回転方向先端側であってディスク半径方向外方側の端部に、メインピン取付用のメインピン穴が設けられており、該メインピン穴位置よりもディスク半径方向内方側に、取付部への取付用穴部が設けられている。ここで、メインピン穴と取付用穴部とを結んだ線は、パッドの幅方向の略中心位置とディスクの中心線とを結んだ線に平行をなしている。
【０００３】
上記ディスクブレーキにおいて、第一パッドにかかる車両後進方向のトルクは、該第一パッドの車両前進時のディスク回転方向後端側を案内支持する、キャリパに設けられた支持ピンで受けることになるため、キャリパのキャリアに対する摺動部分にこのトルクが作用して、キャリパのキャリアに対する摺動に影響を及ぼすことがあった。
このため、従来から、キャリアにトルク発生時に当接する突起等を設けて、この部分で後進方向のトルクを受けるようになっている。
【０００４】
また同様に、第一パッドにかかる車両後進方向のトルクが、キャリパのキャリアに対する摺動に影響を及ぼすことがないように、そのトルクをキャリア側で受けるためキャリアを図８および図９に示すように、長辺部６０とその両側に設けられた短辺部６１，６２とを有する略Ｕ字形状とし、両短辺部６１，６２の相対向する部分に、前後進方向トルク発生時に図示せぬ第一パッドに当接してトルクを受ける突起６３，６４をそれぞれ設けたディスクブレーキがある。そして、このようなキャリアのうち、アルミニウムや鉄等の鋳造また鍛造により安価に製作できる板金製キャリアでは、ディスク軸線方向に前記突起６３，６４を突出させて、その先端側に第一パッドを配置することにより、ディスクとキャリアとをより離間させ、これらの干渉を防止するようにしたものがある。
【０００５】
【発明が解決しようとする課題】
上記前者のディスクブレーキにおいては、ディスクとキャリアとをより離間させ干渉を防止するため、第一パッドの厚みを厚くして、キャリアとディスクとをより離間させている。このため、重量が増加してしまうという問題があった。
【０００６】
また、上記後者のディスクブレーキにおいても、キャリアが長辺部とその両側に設けられた短辺部とを有する略Ｕ字形状としているため、重量の低減が十分ではないという問題があった。このため、キャリアを、その車両前進時のディスク回転方向後端側の短辺部を略した形状とすることも考えられるが、このようにすると、パッドのトルクを受ける際にキャリアに生じる応力が大きくなるため、キャリアの肉厚を厚くする必要があり、結果的に重量は低減が十分とはならないという問題があった。
【０００７】
したがって、本発明の目的は、第一パッドの制動トルクをキャリア側で直接受ける構成とした上で、重量を低減することができるディスクブレーキを提供することである。
【０００８】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１記載のディスクブレーキは、ディスクの一面側に配置され車両の非回転の取付部に固定されるキャリアと、該キャリアにディスクの軸線方向に平行をなすよう取り付けられ、一端部がディスクの外周外方を越えて突出し、他端部がディスクに対し反対方向に突出するメインピンと、前記キャリアに、ディスクの軸線方向に平行をなしかつディスクに対し反対方向に突出するよう取り付けられた摺動案内ピンと、ディスクの一面側に対向配置される第一パッドと、ディスクの他面側に対向配置されるとともに、車両前進時のディスク回転方向先端側に前記メインピンの一端部側に案内支持される案内孔を有する第二パッドと、前記メインピンの他端部側と前記摺動案内ピンとに摺動自在に支持されるとともに、前記第一パッドおよび第二パッドの、車両前進時のディスク回転方向後端側を案内支持する支持ピンがディスク軸線方向に平行にディスクの外周外方を跨いで設けられ、前記両パッドをそれぞれのディスクに対し反対側から挾持可能なキャリパとを有するものであって、前記キャリアは、前記第一パッドのディスク半径方向内方側に略沿う長辺部と、該第一パッドの、車両前進時のディスク回転方向先端側に略沿う短辺部とからなり、前記短辺部には、ディスク半径方向外方側の端部に前記メインピン取付用のメインピン穴と、該メインピン穴位置よりもディスク半径方向内方側に前記取付部への取付用第一穴部と、前記メインピン穴位置よりもディスク半径方向内方側であって第一パッド側の中間位置に、前記第一パッドの車両前進時のディスク回転方向先端側に向けて突出して該第一パッドのトルク受面を形成するとともに該トルク受面のディスク半径方向外方側に位置する上面部にて前記第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部と、がそれぞれ設けられ、前記長辺部には、車両前進時のディスク回転方向後端側に前記摺動案内ピン取付用の案内ピン穴と前記長辺部の中間所定位置に前記取付部への取付用第二穴部とがそれぞれ設けられるとともに、前記案内ピン穴と前記取付用第二穴部との間でディスク半径方向外方側に、前記第一パッドのディスク半径方向内方側に係合する後進側トルク受部が設けられて前記取付用第一穴部の中心と前記取付用第二穴部の中心とを結んだ線に対し前記取付用第一穴部の中心から引いた垂線と重なる位置に前記メインピン穴が形成されていることを特徴としている。
本発明の請求項２記載のディスクブレーキは、ディスクの一面側に配置され車両の非回転の取付部に固定されるキャリアと、該キャリアにディスクの軸線方向に平行をなすよう取り付けられ、一端部がディスクの外周外方を越えて突出し、他端部がディスクに対し反対方向に突出するメインピンと、前記キャリアに、ディスクの軸線方向に平行をなしかつディスクに対し反対方向に突出するよう取り付けられた摺動案内ピンと、ディスクの一面側に対向配置される第一パッドと、ディスクの他面側に対向配置されるとともに、車両前進時のディスク回転方向先端側に前記メインピンの一端部側に案内支持される案内孔を有する第二パッドと、前記メインピンの他端部側と前記摺動案内ピンとに摺動自在に支持されるとともに、前記第一パッドおよび第二パッドの、車両前進時のディスク回転方向後端側を案内支持する支持ピンがディスク軸線方向に平行にディスクの外周外方を跨いで設けられ、前記両パッドをそれぞれのディスクに対し反対側から挾持可能なキャリパと、を有するものであって、前記キャリアは、前記第一パッドのディスク半径方向内方側に略沿う長辺部と、該第一パッドの、車両前進時のディスク回転方向先端側に略沿う短辺部とからなり、前記短辺部には、ディスク半径方向外方側の端部に前記メインピン取付用のメインピン穴と、該メインピン穴位置よりもディスク半径方向内方側に前記取付部への取付用第一穴部と、前記メインピン穴位置よりもディスク半径方向内方側であって第一パッド側の中間位置に、前記第一パッドの車両前進時のディスク回転方向先端側に向けて突出して該第一パッドのトルク受面を形成するとともに該トルク受面のディスク半径方向外方側に位置する上面部にて前記第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部と、がそれぞれ設けられ、前記長辺部には、前記摺動案内ピン取付用の案内ピン穴と前記取付部への取付用第二穴部とが設けられるとともに、ディスク半径方向外方側に位置して、前記第一パッドのディスク半径方向内方側の略中央位置に係合する後進側トルク受部が設けられていて、前記取付用第一穴部の中心と前記取付用第二穴部の中心とを結んだ線に対し前記取付用第一穴部の中心から引いた垂線と重なる位置に前記メインピン穴が形成されていることを特徴としている。
【００１０】
【作用】
本発明の請求項１記載のディスクブレーキによれば、第一パッドの車両前進時のディスク回転方向先端側に略沿うキャリアの短辺部の第一パッド側の中間位置に、第一パッドの車両前進時のディスク回転方向先端側に向けて突出して第一パッドのトルク受面を形成するとともにトルク受面のディスク半径方向外方側に位置する上面部にて第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部が設けられているため、前進側トルク受部を短辺部の第一パッド側の中間位置に案内溝で形成する場合のようにトルク強度が低下することがなく、十分な強度を持たせることができる。
また、キャリアの第一パッドのディスク半径方向内方側に略沿う長辺部の車両前進時のディスク回転方向後端側にある案内ピン穴と中間所定位置にある取付用第二穴部との間のディスク半径方向外方側に、第一パッドのディスク半径方向内方側に係合する後進側トルク受部が設けられているため、前進側トルク受部と後進側トルク受部とが離れることになり、強度および耐久性の点で有利となる。つまり、前進側トルク受部の近傍に後進側トルク受部を設けた場合、前後進の繰り返し制動における繰り返し応力が第一パッドおよびキャリアの略同じ位置に加わり強度および耐久性の点で不利になるが、前進側トルク受部と後進側トルク受部とを上記のように離すことで強度および耐久性の点で有利になる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、メインピンをキャリパのシリンダ中心に近づけることができる。
加えて、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、車両の前進制動時に第二パッドからメインピンに加わる力が分力となって小さくなる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、取付部との干渉を避けつつメインピン穴位置を取付用第二穴部に近づけることができる。
【００１１】
本発明の請求項２記載のディスクブレーキによれば、第一パッドの車両前進時のディスク回転方向先端側に略沿うキャリアの短辺部の第一パッド側の中間位置に、第一パッドの車両前進時のディスク回転方向先端側に向けて突出して第一パッドのトルク受面を形成するとともにトルク受面のディスク半径方向外方側に位置する上面部にて第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部が設けられているため、前進側トルク受部を短辺部の第一パッド側の中間位置に案内溝で形成する場合のようにトルク強度が低下することがなく、十分な強度を持たせることができる。
また、キャリアの第一パッドのディスク半径方向内方側に略沿う長辺部に、ディスク半径方向外方側に位置して、第一パッドのディスク半径方向内方側の略中央位置に係合する後進側トルク受部が設けられているため、前進側トルク受部と後進側トルク受部とが離れることになり、強度および耐久性の点で有利となる。つまり、前進側トルク受部の近傍に後進側トルク受部を設けた場合、前後進の繰り返し制動における繰り返し応力が第一パッドおよびキャリアの略同じ位置に加わり強度および耐久性の点で不利になるが、上記のように前進側トルク受部と後進側トルク受部とを離すことで強度および耐久性の点で有利になる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、メインピンをキャリパのシリンダ中心に近づけることができる。
加えて、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、車両の前進制動時に第二パッドからメインピンに加わる力が分力となって小さくなる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、取付部との干渉を避けつつメインピン穴位置を取付用第二穴部に近づけることができる。
【００１４】
【実施例】
本発明の一実施例によるディスクブレーキを図面を参照して以下に説明する。図中符号１は、車輪とともに回転するディスク、符号２はディスク１の一面側に配置され車両の非回転の図示せぬ取付部に固定されるキャリアをそれぞれ示している。図３に示すように、ディスク１の一面側には第一パッド３が対向配置されており、他面側には第二パッド４が対向配置されている。
【００１５】
図１および図２に示すように、キャリア２は、第一パッド３の、ディスク半径方向内方側（図１における下側）に略沿う長辺部６と、該第一パッド３の、車両前進時のディスク回転方向（図１において矢印で示す方向）先端側に略沿う短辺部７とからなる略Ｌ字状をなしている。このキャリア２の短辺部７には、第一パッド３よりも所定量ディスク半径方向外方側の端部（図１における上端部）にメインピン穴８が設けられており、このメインピン穴８には、図３に示すように、ディスク軸線方向に平行をなすよう、一端部がディスク１の外周外方を越えて突出し、他端部がディスク１に対し反対方向に突出するメインピン９がその軸線方向の中間所定位置で固定されている。また、該メインピン穴８よりもディスク半径方向内方側には、上記図示せぬ取付部への取付用のボルト等が挿通される取付用第一穴部１１が設けられている。
【００１６】
ここで、本実施例においては、取付用第一穴部１１が、メインピン穴８より車両前進時のディスク回転方向先端側（図１における左側）に位置している。
【００１７】
加えて、短辺部７のメインピン穴８よりもディスク半径方向内方側であって第一パッド３側の中間位置には、前記第一パッド３の車両前進時のディスク回転方向先端側に対向して前進側トルク受部１２が設けられている。ここで、この前進側トルク受部１２は、車両前進時にディスク１との接触により第一パッド３に生じるトルクを、該第一パッド３に当接して受けるものである。なお、上記取付用第一穴部１１の位置は前進側トルク受部１２とトルク受け方向で一致するようにできるだけメインピン９側に配置するのがよい。
【００１８】
ここで、本実施例において、前進側トルク受部１２は、図２に示すように、ディスク方向（図２における上方向）に突出しており、第一パッド３側のトルク受面１３と、該トルク受面１３に垂直かつディスク軸線方向に沿う上面部１４および下面部１５を有している。そして、そのディスク半径方向外方側の上面部１４が、第一パッド３の、前進時のディスク回転方向先端側に突出形成された突部１６をディスク軸線方向に沿って案内するようになっている。なお、第一パッド３は、後述の支持ピン２８を中心とした揺動を前進側トルク受部１２によって略規制されている。
【００１９】
キャリア２の長辺部６には、車両前進時のディスク回転方向後端側に、上記メインピン穴８より小径の案内ピン穴１８がディスク軸線方向に平行をなして設けられており、該案内ピン穴１８には、ディスク軸線方向に平行をなしかつディスクに対し反対方向に突出するよう、上記メインピン９より小径の摺動案内ピン１９が固定されている。また長辺部６には、上記図示せぬ取付部への取付用のボルト等が挿通される取付用第二穴部２０がその中間所定位置に設けられている。
【００２０】
ここで、本実施例においては、案内ピン穴１８と取付用第二穴部２０との間すなわち長辺部６の中間部分に、ディスク半径方向外方側に、第一パッド３のディスク半径方向内方側に対向して後進側トルク受部２１が設けられている。図２に示すように、後進側トルク受部２１は、第一パッド３側のトルク受面２２をディスク軸線方向に沿わせるよう、ディスク方向（図２における上方向）に突出しており、その短辺部７側の側面が、該第一パッド３のディスク半径方向内方側に突出して設けられた突部２３に対向している。ここで、この後進側トルク受部２１は、車両後進時にディスク１との接触により第一パッド３に生じるトルクを、該第一パッド３に当接して受けるものである。
【００２１】
上記キャリア２のメインピン９の、ディスク１に対し反対側の一端部側および摺動案内ピン１９には、図３および図４に示すように、パッド３，４をディスク方向に押圧するキャリパ２４が摺動自在に支持されている。このキャリパ２４は、キャリア２のディスク１に対し反対側（すなわち第一パッド３のディスク１に対し反対側）にあってメインピン９の一端部側および摺動案内ピン１９に摺動自在に嵌合するシリンダ部２５と、第二パッド４のディスク１に対し反対側に沿って延びる爪部（反作用部）２６と、ディスク１の半径方向外側を跨いでこれらシリンダ部２５と爪部２６とを連結させる連結部２７とを有している。キャリパ２４の、シリンダ部２５と爪部２６との間には、車両前進時のディスク回転方向後端側に、ディスク軸線方向に平行をなす支持ピン２８がディスク１の外周外方を跨いで設けられており、この支持ピン２８は、第一パッド３および第二パッド４の、車両前進時のディスク回転方向後端側かつディスク半径方向外方側に設けられた案内穴３０，３１に挿通されており、これにより第一パッド３および第二パッド４の、車両前進時のディスク回転後端側はディスク軸線方向に沿って摺動自在となっている。
【００２２】
なお、第一パッド３の、車両前進時のディスク回転先端側は、上記したように、その突部１６が前進側トルク受部１２上を案内されることによりディスク軸線方向に沿って摺動自在となっている。また、第二パッド４は、図５に示すように、車両前進時のディスク回転方向（図５において矢印で示す方向）の先端側かつディスク半径方向外方側に案内穴３２を有しており、この案内穴３２は、メインピン９の他端側に挿通されていて、これにより車両前進時のディスク回転先端側が、ディスク軸線方向に沿って摺動自在となっている。
【００２３】
そして、シリンダ部２５内には、ブレーキ液圧により爪部２６方向に突出する図示せぬピストンが嵌合されており、このピストンの突出により、キャリパ２４は、キャリア２に対して摺動しつつ両パッド３，４をそれぞれのディスク１に対し反対側から挾持してディスク方向に押圧し、これらをディスク１に接触させるようになっている。
【００２４】
ここで、本実施例において、前進側トルク受部１２には、図１および図６に示すように、第一パッド３との間に耐熱ステンレス鋼等からなるリテーナ３４が介在して設けられている。なお、このリテーナ３４は、第一パッド３の摺動を円滑に行わせ、また第一パッド３の振動や制動トルクによるキャリア２への打痕の発生等を防止し、さらにキャリア２と第一パッド３との錆による固着を防止すること等を目的として設けられるものである。
【００２５】
リテーナ３４は、前進側トルク受部１２のトルク受面１３に沿う主板部３５と、上面部１４に沿う上板部３６と、下面部１５に沿う下板部３７とを有するもので、上板部３６の、ディスク１に対し反対側の端部には、第一パッド３の突部１６のディスク１に対し反対側に沿うようディスク半径方向外方側に突出する係止片部３８が設けられており、下板部３７にも係止片部３８と対称にディスク半径方向内方側に突出する係止片部３９が設けられている。ここで、係止片部３８は、第一パッド３がシリンダ部２５側から脱落するのを防止するものである。
さらに、主板部３５の、ディスク１に対し反対側の端部には、前進側トルク受部１２の、ディスク１に対し反対側の面に沿って延在する係止部４０が設けられており、主板部３５の、ディスク１側の端部には、前進側トルク受部１２の、ディスク１側の面に沿って延在しさらに先端側が前進側トルク受部１２の第一パッド３に対し反対側に沿うよう屈曲する係止部４１が設けられている。そして、これら係止部４０，４１でリテーナ３４は前進側トルク受部１２からの抜け止めがなされている。
なお、図１から明らかなように、取付用第一穴部１１の中心と取付用第二穴部２０の中心とを結んだ線に対し取付用第一穴部１１の中心から引いた垂線と重なる位置にメインピン穴８が形成されている。
【００２６】
このような構成のディスクブレーキによれば、第一パッド３の車両前進時のディスク回転方向先端側に略沿う、キャリア２の短辺部７に、ディスク半径方向外方側の端部にメインピン取付用のメインピン穴８が設けられ、該メインピン穴８よりもディスク半径方向内方側かつ車両前進時のディスク回転方向先端側に図示せぬ取付部への取付用第一穴部１１が設けられているため、該取付用第一穴部１１と、メインピン穴８よりもディスク半径方向内方側の第一パッド３側に設けられた前進側トルク受部１２との間の距離が大きくなる。したがって、第一パッド３からのトルクを前進側トルク受部１２で受けた際の応力を低くすることができるため、キャリア２の肉厚を厚くする必要がなく、重量を低減することができる。
【００２７】
また、キャリア２の短辺部７および長辺部６に、ディスク１方向に突出して、前進側トルク受部１２および後進側トルク受部２１が設けられているため、第一パッド３の厚みを厚くすることなくキャリア２とディスク１との距離をより離間させ、これらの干渉を防ぐことができる。したがって、さらに重量を低減することができる。
【００２８】
加えて、キャリア２の短辺部７の、メインピン穴８よりもディスク半径方向内方側かつ第一パッド３側の中間位置に、ディスク１方向に突出する前進側トルク受部１２が設けられており、かつキャリア２の長辺部６の、ディスク半径方向外方側の中間位置に、ディスク１方向に突出する後進側トルク受部２１が設けられているため、これら前進側トルク受部１２および後進側トルク受部２１の両側にキャリア２の他の部分が存在することになる。これにより、図７に示すような形状にプレスで打ち抜かれた素材２Ａを、プレス等で前進側トルク受部１２および後進側トルク受部２１を曲げてキャリア２を形成する際に、両側の部分を押さえて曲げることができる。したがって、曲げによる素材の変形が防止でき、この曲げ加工時の精度を確保できる。
【００２９】
さらに、前進側トルク受部１２および後進側トルク受部２１の、ディスク軸線方向への突出量を変更することにより、車両への取付軸寸法が異なる場合でも対応でき、フローティングディスクロータを採用している車両にも対応可能となる。
【００３０】
そして、前進側トルク受部１２と第一パッド３との間に介在するリテーナ３４に、第一パッド３の突部１６のディスク１に対し反対側に沿う係止片部３８がディスク半径方向外方側に延出して形成されているため、該リテーナ３４の係止片部３８が第一パッド３の幅方向の中央（図１における右方向）に向けて延出するものより、係止片部３８の位置を第一パッド３の幅方向における、より外側とすることができる。したがって、従来のように係止片部が第一パッド３の中心方向に向けて延在するものであるとキャリパ２４とリテーナ３４との干渉を防止すべくキャリア２を大きくする必要があったが、この必要がなくなり、キャリア２の大きさを必要最小限にすることができ、さらに軽量化が図れる。
【００３１】
また、係止片部は、少なくとも上板部側３６側の係止片部３８のみに設けておけばよいが、下板部３７にも係止片部３９を設けることにより、製作型を一つとしても左右取付方向違いのものにも適用でき、コストが低減できるというメリットがある上、逆組付が生じることがなくなる。
【００３２】
【発明の効果】
以上詳述したように、本発明の請求項１記載のディスクブレーキによれば、第一パッドの車両前進時のディスク回転方向先端側に略沿うキャリアの短辺部の第一パッド側の中間位置に、第一パッドの車両前進時のディスク回転方向先端側に向けて突出して第一パッドのトルク受面を形成するとともにトルク受面のディスク半径方向外方側に位置する上面部にて第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部が設けられているため、前進側トルク受部を短辺部の第一パッド側の中間位置に案内溝で形成する場合のようにトルク強度が低下することがなく、十分な強度を持たせることができる。
【００３３】
また、キャリアの第一パッドのディスク半径方向内方側に略沿う長辺部の車両前進時のディスク回転方向後端側にある案内ピン穴と中間所定位置にある取付用第二穴部との間のディスク半径方向外方側に、第一パッドのディスク半径方向内方側に係合する後進側トルク受部が設けられているため、前進側トルク受部と後進側トルク受部とが離れることになり、強度および耐久性の点で有利となる。つまり、前進側トルク受部の近傍に後進側トルク受部を設けた場合、前後進の繰り返し制動における繰り返し応力が第一パッドおよびキャリアの略同じ位置に加わり強度および耐久性の点で不利になるが、前進側トルク受部と後進側トルク受部とを上記のように離すことで強度および耐久性の点で有利になる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、メインピンをキャリパのシリンダ中心に近づけることができる。したがって、メインピンで支持される第二パッドおよびキャリパを小型化できるとともに、キャリパの摺動性を向上させることができる。
加えて、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、車両の前進制動時に第二パッドからメインピンに加わる力が分力となって小さくなる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、取付部との干渉を避けるために取付用第一穴部とメインピン穴との中心間距離を確保する必要があっても、取付部との干渉を避けつつメインピン穴位置を取付用第二穴部に近づけることができ、モーメントの腕となる、前進制動時にメインピンに加わる力の方向に沿う線であってメインピン穴の中心を通る線と取付用第一穴部の中心との距離を短くできる。したがって、キャリアの取付部に加わるモーメントをさらに小さくでき、強度的にさらに有利となる。
【００３４】
本発明の請求項２記載のディスクブレーキによれば、第一パッドの車両前進時のディスク回転方向先端側に略沿うキャリアの短辺部の第一パッド側の中間位置に、第一パッドの車両前進時のディスク回転方向先端側に向けて突出して第一パッドのトルク受面を形成するとともにトルク受面のディスク半径方向外方側に位置する上面部にて第一パッドの先端側に設けられた突部をディスク軸線方向に沿って案内する前進側トルク受部が設けられているため、前進側トルク受部を短辺部の第一パッド側の中間位置に案内溝で形成する場合のようにトルク強度が低下することがなく、十分な強度を持たせることができる。
また、キャリアの第一パッドのディスク半径方向内方側に略沿う長辺部に、ディスク半径方向外方側に位置して、第一パッドのディスク半径方向内方側の略中央位置に係合する後進側トルク受部が設けられているため、前進側トルク受部と後進側トルク受部とが離れることになり、強度および耐久性の点で有利となる。つまり、前進側トルク受部の近傍に後進側トルク受部を設けた場合、前後進の繰り返し制動における繰り返し応力が第一パッドおよびキャリアの略同じ位置に加わり強度および耐久性の点で不利になるが、上記のように前進側トルク受部と後進側トルク受部とを離すことで強度および耐久性の点で有利になる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、メインピンをキャリパのシリンダ中心に近づけることができる。したがって、メインピンで支持される第二パッドおよびキャリパを小型化できるとともに、キャリパの摺動性を向上させることができる。
加えて、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、車両の前進制動時に第二パッドからメインピンに加わる力が分力となって小さくなる。
さらに、取付用第一穴部の中心と取付用第二穴部の中心とを結んだ線に対し取付用第一穴部の中心から引いた垂線と重なる位置にメインピン穴が形成されているため、取付部との干渉を避けるために取付用第一穴部とメインピン穴との中心間距離を確保する必要があっても、取付部との干渉を避けつつメインピン穴位置を取付用第二穴部に近づけることができ、モーメントの腕となる、前進制動時にメインピンに加わる力の方向に沿う線であってメインピン穴の中心を通る線と取付用第一穴部の中心との距離を短くできる。したがって、キャリアの取付部に加わるモーメントをさらに小さくでき、強度的にさらに有利となる。
【図面の簡単な説明】
【図１】本発明の一実施例によるディスクブレーキのキャリパおよび第一パッド等を示す図３におけるＡ方向から見た図である。
【図２】本発明の一実施例によるディスクブレーキのキャリパを示す平面図である。
【図３】本発明の一実施例によるディスクブレーキを示す平面図である。
【図４】本発明の一実施例によるディスクブレーキを示す図３におけるＡ方向から見たである。
【図５】本発明の一実施例によるディスクブレーキのキャリパおよび第二パッドを示す図３におけるＢ方向から見た図である。
【図６】本発明の一実施例によるディスクブレーキのキャリパおよびリテーナを示す平断面図である。
【図７】本発明の一実施例によるディスクブレーキのキャリパの素材を示す図３におけるＡ方向から見た図である。
【図８】従来のディスクブレーキのキャリパの一例を示す正面図である。
【図９】従来のディスクブレーキのキャリパの一例を示す平面図である。
【符号の説明】
１ディスク
２キャリア
３第一パッド
４第二パッド
６長辺部
７短辺部
８メインピン穴
９メインピン
１１取付用第一穴部
１２前進側トルク受部
１６突部
１８案内ピン穴
１９摺動案内ピン
２０取付用第二穴部
２１後進側トルク受部
２４キャリパ
２８支持ピン
３４リテーナ
３８，３９係止片部[0001]
[Industrial application fields]
The present invention relates to a disc brake used for braking a vehicle or the like.
[0002]
[Prior art]
As a disc brake used for braking a vehicle or the like, for example, there is one described in Japanese Utility Model Publication No. 63-36175. The disc brake is disposed on one side of the disc and is fixed to a non-rotating attachment portion of the vehicle, and is attached to the carrier so as to be parallel to the axial direction of the disc. A main pin projecting beyond the other end of the disc in the opposite direction to the disc, a sliding guide pin mounted on the carrier so as to be parallel to the axial direction of the disc and projecting in the opposite direction to the disc, A first pad opposed to one side, a second pad arranged opposite to the other side of the disk, and guided to and supported by the other end of the main pin in the disk rotation direction when the vehicle moves forward, The first pad and the second pad are slidably supported by one end of the pin and the sliding guide pin, and the rear end of the first pad and the second pad in the disk rotation direction when the vehicle moves forward Support pins to guide the support has a clamping possible caliper from the opposite side provided parallel to straddle the outer periphery outward of the disk to the disk axial direction, the two pads for each disk. A main pin hole for mounting a main pin is provided at the end of the carrier at the front end side in the disk rotation direction and the outer side in the radial direction of the disk when the vehicle moves forward. A mounting hole for the mounting portion is provided on the radially inner side. Here, the line connecting the main pin hole and the mounting hole is parallel to the line connecting the approximate center position in the width direction of the pad and the center line of the disk.
[0003]
In the disc brake, torque in the vehicle reverse direction applied to the first pad is received by a support pin provided on the caliper that guides and supports the rear end side of the first pad in the disc rotation direction when the vehicle advances. The torque acts on the sliding portion of the caliper with respect to the carrier, which may affect the sliding of the caliper with respect to the carrier.
For this reason, conventionally, a protrusion or the like that comes into contact with the carrier when torque is generated is provided, and this part receives the torque in the reverse direction.
[0004]
Similarly, the carrier is shown in FIGS. 8 and 9 in order to receive the torque on the carrier side so that the torque in the vehicle reverse direction applied to the first pad does not affect the sliding of the caliper with respect to the carrier. In addition, a substantially U shape having a long side portion 60 and short side portions 61 and 62 provided on both sides of the long side portion 60 is shown. There is a disc brake provided with protrusions 63 and 64 that contact the first pad and receive torque. Among such carriers, in the case of a sheet metal carrier that can be manufactured at low cost by casting or forging of aluminum or iron, the projections 63 and 64 are projected in the disk axial direction, and the first pad is arranged on the tip side. By doing so, there is one in which the disc and the carrier are further separated to prevent these interferences.
[0005]
[Problems to be solved by the invention]
In the former disc brake, in order to further separate the disc and the carrier and prevent interference, the thickness of the first pad is increased to further separate the carrier and the disc. For this reason, there existed a problem that a weight will increase.
[0006]
The latter disc brake also has a problem that the weight is not sufficiently reduced because the carrier has a substantially U shape having a long side portion and a short side portion provided on both sides thereof. For this reason, it is conceivable that the carrier has a shape in which the short side portion on the rear end side in the disc rotation direction when the vehicle moves forward is omitted, but in this case, the stress generated in the carrier when receiving the pad torque is generated. In order to increase the thickness, it is necessary to increase the thickness of the carrier. As a result, there is a problem that the weight is not sufficiently reduced.
[0007]
Accordingly, an object of the present invention is to provide a disc brake capable of reducing the weight while adopting a configuration in which the braking torque of the first pad is directly received on the carrier side.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, a disc brake according to claim 1 of the present invention includes a carrier disposed on one side of the disc and fixed to a non-rotating mounting portion of the vehicle, and the carrier parallel to the axial direction of the disc. A main pin that protrudes beyond the outer periphery of the disk and protrudes in the opposite direction to the disk, and the carrier is parallel to the disk axial direction and opposite to the disk. A sliding guide pin attached so as to protrude in the direction, a first pad opposed to one side of the disc, and opposed to the other side of the disc, and at the front end side of the disc rotating direction when the vehicle is moving forward A second pad having a guide hole guided and supported on one end side of the main pin, and the other end side of the main pin and the sliding guide pin are slidably supported. Both of the first pad and the second pad are provided with support pins for guiding and supporting the rear end side in the disk rotation direction when the vehicle moves forward, extending across the outer periphery of the disk in parallel to the disk axis direction. A caliper that can be held from the opposite side with respect to each disk, wherein the carrier has a long side portion substantially along the inner side in the disk radial direction of the first pad, and the vehicle of the first pad. A short side portion substantially along the front end side of the disk rotation direction during forward movement, and the short side portion includes a main pin hole for mounting the main pin at an end portion on the outer side in the disk radial direction, and the main pin hole A first hole for mounting to the mounting portion on the inner side in the radial direction of the disk from the position, and an intermediate position on the inner side of the first pad side in the radial direction of the disk from the position of the main pin hole. One pad vehicle Projecting toward the front end side in the disk rotation direction during advance to form a torque receiving surface of the first pad, and at the upper surface portion located on the outer side in the disk radial direction of the torque receiving surface, the front end side of the first pad A forward side torque receiving portion that guides the protrusion provided on the disc along the disc axis direction, and the long side portion has the sliding guide pin on the rear end side in the disc rotation direction when the vehicle advances. A guide pin hole for mounting and a second hole portion for mounting to the mounting portion are provided at intermediate predetermined positions between the long side portions, respectively, and between the guide pin hole and the second mounting hole portion. On the outer side in the radial direction of the disk, there is provided a reverse torque receiving portion that engages with the inner side of the first pad in the radial direction of the disk.The main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole with respect to a line connecting the center of the first mounting hole and the center of the second mounting hole. TheIt is characterized by being.
  The disc brake according to claim 2 of the present invention is arranged on one side of the disc and fixed to a non-rotating mounting portion of the vehicle, and is attached to the carrier so as to be parallel to the axial direction of the disc. Is protruded beyond the outer periphery of the disk, and the other end is protruded in the opposite direction to the disk, and is attached to the carrier so as to be parallel to the axial direction of the disk and protrude in the opposite direction to the disk. A sliding guide pin, a first pad disposed opposite to one surface of the disk, and disposed opposite to the other surface of the disk, and on one end side of the main pin on the front end side in the disk rotation direction when the vehicle moves forward. A second pad having a guide hole to be guided and supported, slidably supported by the other end side of the main pin and the sliding guide pin, and the first pad And a support pin for guiding and supporting the rear end side of the disc rotation direction when the vehicle moves forward is provided across the outer periphery of the disc in parallel to the disc axis direction, and the two pads are opposed to the respective discs. A caliper that can be clamped from the side, wherein the carrier has a long side portion substantially along the inner side in the radial direction of the disk of the first pad, and the disk rotation of the first pad when the vehicle moves forward A short side portion substantially along the front end side in the direction, and the short side portion has a main pin hole for mounting the main pin at an end portion on the outer side in the radial direction of the disc, and a disc radius larger than the position of the main pin hole. A first hole portion for mounting to the mounting portion on the inner side in the direction and the vehicle advancement of the first pad at an intermediate position on the first pad side inward of the main pin hole position in the disc radial direction. Disc rotation method A protrusion provided on the tip side of the first pad at the upper surface located on the outer side in the disk radial direction of the torque receiving surface while projecting toward the tip side to form the torque receiving surface of the first pad And a forward side torque receiving portion for guiding the guide member along the disk axial direction, and a guide pin hole for attaching the sliding guide pin and a second hole for attaching to the attachment portion on the long side portion, respectively. And a reverse-side torque receiving portion that is located on the outer side in the radial direction of the disk and engages with a substantially central position on the inner side in the radial direction of the disk of the first pad.The main pin hole is located at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. FormedIt is characterized by being.
[0010]
[Action]
  According to the disc brake of the first aspect of the present invention, the vehicle of the first pad is located at the intermediate position on the first pad side of the short side portion of the carrier substantially along the front end side of the disc rotation direction when the first pad moves forward. Projecting toward the front end side of the disk rotation direction during forward movement to form the torque receiving surface of the first pad, and provided on the front end side of the first pad at the upper surface portion located on the outer side in the disk radial direction of the torque receiving surface Since the forward side torque receiving part that guides the protruding part along the disk axial direction is provided, the forward side torque receiving part is formed with a guide groove at an intermediate position on the first pad side of the short side part. Thus, the torque strength does not decrease and sufficient strength can be obtained.
  Further, a long side portion of the first pad of the carrier that is substantially along the inner side in the radial direction of the disk is formed of a guide pin hole on the rear end side in the disk rotation direction when the vehicle moves forward, and a second mounting hole portion in the middle predetermined position. Since a reverse torque receiving portion that engages with the first pad in the disk radial direction is provided on the outer side in the disk radial direction, the forward torque receiving portion and the reverse torque receiving portion are separated from each other. This is advantageous in terms of strength and durability. That is, when the reverse side torque receiving part is provided in the vicinity of the forward side torque receiving part, the repeated stress in repeated braking in the forward / reverse direction is applied to substantially the same position of the first pad and the carrier, which is disadvantageous in terms of strength and durability. However, separating the forward torque receiving portion and the reverse torque receiving portion as described above is advantageous in terms of strength and durability.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin can be brought close to the center of the caliper cylinder.
In addition, a main pin hole is formed at a position overlapping with a perpendicular drawn from the center of the first mounting hole portion to the line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the force applied from the second pad to the main pin during forward braking of the vehicle becomes a component force and becomes small.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin hole position can be brought close to the second mounting hole portion while avoiding interference with the mounting portion.
[0011]
  According to the disc brake of the second aspect of the present invention, the vehicle of the first pad is positioned at the intermediate position on the first pad side of the short side portion of the carrier substantially along the front end side of the disc rotation direction when the first pad moves forward. Projecting toward the front end side of the disk rotation direction during forward movement to form the torque receiving surface of the first pad, and provided on the front end side of the first pad at the upper surface portion located on the outer side in the disk radial direction of the torque receiving surface Since the forward side torque receiving part that guides the protruding part along the disk axial direction is provided, the forward side torque receiving part is formed with a guide groove at an intermediate position on the first pad side of the short side part. Thus, the torque strength does not decrease and sufficient strength can be obtained.
  Also, on the long side of the first pad of the carrier that is substantially along the inner side of the disk in the radial direction of the disk, it is located on the outer side of the disk in the radial direction of the disk, and engages with the substantially central position of the inner side of the first pad in the radial direction of the disk. Since the reverse torque receiving portion is provided, the forward torque receiving portion and the reverse torque receiving portion are separated from each other, which is advantageous in terms of strength and durability. That is, when the reverse side torque receiving part is provided in the vicinity of the forward side torque receiving part, the repeated stress in repeated braking in the forward / reverse direction is applied to substantially the same position of the first pad and the carrier, which is disadvantageous in terms of strength and durability. However, separating the forward torque receiving portion and the reverse torque receiving portion as described above is advantageous in terms of strength and durability.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin can be brought close to the center of the caliper cylinder.
In addition, a main pin hole is formed at a position overlapping with a perpendicular drawn from the center of the first mounting hole portion to the line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the force applied from the second pad to the main pin during forward braking of the vehicle becomes a component force and becomes small.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin hole position can be brought close to the second mounting hole portion while avoiding interference with the mounting portion.
[0014]
【Example】
A disc brake according to an embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a disk that rotates with the wheel, and reference numeral 2 denotes a carrier that is arranged on one side of the disk 1 and is fixed to a non-rotating mounting portion (not shown) of the vehicle. As shown in FIG. 3, the first pad 3 is disposed opposite to one side of the disk 1, and the second pad 4 is disposed opposite to the other side.
[0015]
As shown in FIGS. 1 and 2, the carrier 2 includes a long side portion 6 substantially along the inner side in the disk radial direction (lower side in FIG. 1) of the first pad 3, and the vehicle of the first pad 3. The disk rotates in the forward direction (the direction indicated by the arrow in FIG. 1) and has a substantially L-shape consisting of a short side portion 7 substantially along the tip side. The short side portion 7 of the carrier 2 is provided with a main pin hole 8 at an end portion (upper end portion in FIG. 1) on the outer side in the disc radial direction from the first pad 3 by a predetermined amount. As shown in FIG. 3, the main pin 9 has one end protruding beyond the outer periphery of the disk 1 and the other end protruding in the opposite direction with respect to the disk 1 so as to be parallel to the disk axial direction. Is fixed at an intermediate predetermined position in the axial direction. Further, on the inner side in the disk radial direction from the main pin hole 8, there is provided a first mounting hole portion 11 through which a bolt or the like for mounting to the mounting portion (not shown) is inserted.
[0016]
Here, in the present embodiment, the first mounting hole portion 11 is located on the front end side (the left side in FIG. 1) in the disk rotation direction when the vehicle moves forward from the main pin hole 8.
[0017]
In addition, at the intermediate position on the first pad 3 side inward of the main pin hole 8 of the short side portion 7 and on the first pad 3 side, the front side of the first pad 3 in the disk rotation direction when the vehicle advances. Opposing torque receiving portions 12 are provided so as to face each other. Here, the forward side torque receiving portion 12 receives the torque generated in the first pad 3 by contact with the disk 1 when the vehicle moves forward in contact with the first pad 3. In addition, it is good to arrange | position to the main pin 9 side as much as possible so that the position of the said mounting 1st hole part 11 may correspond with the advance side torque receiving part 12 in a torque receiving direction.
[0018]
Here, in the present embodiment, as shown in FIG. 2, the forward side torque receiving portion 12 protrudes in the disk direction (upward direction in FIG. 2), and the torque receiving surface 13 on the first pad 3 side, It has an upper surface portion 14 and a lower surface portion 15 that are perpendicular to the torque receiving surface 13 and extend along the disk axial direction. The upper surface portion 14 on the outer side in the disk radial direction guides the protrusion 16 formed so as to protrude from the front end side of the first pad 3 in the disk rotation direction when moving forward along the disk axial direction. Yes. The first pad 3 is substantially restricted by the forward torque receiving portion 12 from swinging around a support pin 28 described later.
[0019]
A guide pin hole 18 having a diameter smaller than that of the main pin hole 8 is provided on the long side portion 6 of the carrier 2 on the rear end side in the disk rotation direction when the vehicle moves forward, in parallel with the disk axial direction. A sliding guide pin 19 having a smaller diameter than the main pin 9 is fixed to the pin hole 18 so as to be parallel to the disk axial direction and protrude in the opposite direction to the disk. The long side portion 6 is provided with a mounting second hole 20 through which a bolt for mounting to a mounting portion (not shown) is inserted at a predetermined position in the middle thereof.
[0020]
Here, in the present embodiment, the radial direction of the first pad 3 between the guide pin hole 18 and the second mounting hole 20, that is, in the middle portion of the long side portion 6, outward in the radial direction of the disc. A reverse torque receiving portion 21 is provided facing the inward side. As shown in FIG. 2, the reverse torque receiving portion 21 protrudes in the disc direction (upward in FIG. 2) so that the torque receiving surface 22 on the first pad 3 side is along the disc axial direction. The side surface on the side 7 side faces a protrusion 23 provided so as to protrude inward in the disk radial direction of the first pad 3. Here, the reverse side torque receiving portion 21 receives the torque generated in the first pad 3 due to contact with the disk 1 when the vehicle is reversely moved in contact with the first pad 3.
[0021]
As shown in FIGS. 3 and 4, the caliper 24 presses the pads 3 and 4 toward the disk as shown in FIGS. 3 and 4 on the one end side of the main pin 9 of the carrier 2 opposite to the disk 1 and the sliding guide pin 19. Is slidably supported. The caliper 24 is on the side opposite to the disk 1 of the carrier 2 (that is, the side opposite to the disk 1 of the first pad 3) and is slidably fitted to one end of the main pin 9 and the sliding guide pin 19. The cylinder part 25 to be joined, the claw part (reaction part) 26 extending along the opposite side to the disk 1 of the second pad 4, and the cylinder part 25 and the claw part 26 across the radially outer side of the disk 1 And a connecting portion 27 to be connected. Between the cylinder part 25 and the claw part 26 of the caliper 24, a support pin 28 that is parallel to the disk axial direction is provided across the outer periphery of the disk 1 on the rear end side in the disk rotation direction when the vehicle moves forward. The support pin 28 is inserted into guide holes 30 and 31 provided on the rear end side in the disk rotation direction and the outer side in the disk radial direction of the first pad 3 and the second pad 4 when the vehicle moves forward. Thus, the rear end side of the disk rotation of the first pad 3 and the second pad 4 when the vehicle moves forward is slidable along the disk axial direction.
[0022]
As described above, the front end side of the disc rotation of the first pad 3 when the vehicle moves forward is slidable along the disc axial direction by the projection 16 being guided on the forward side torque receiving portion 12. It has become. Further, as shown in FIG. 5, the second pad 4 has a guide hole 32 on the front end side in the disk rotation direction (direction indicated by an arrow in FIG. 5) when the vehicle moves forward and on the outer side in the disk radial direction. The guide hole 32 is inserted into the other end side of the main pin 9 so that the disk rotation front end side when the vehicle moves forward is slidable along the disk axial direction.
[0023]
A piston (not shown) that protrudes in the direction of the claw 26 due to the brake fluid pressure is fitted in the cylinder 25, and the caliper 24 slides with respect to the carrier 2 by the protrusion of the piston. Both pads 3 and 4 are held against the respective discs 1 from the opposite side and pressed in the disc direction so that they are brought into contact with the disc 1.
[0024]
Here, in the present embodiment, the forward torque receiving portion 12 is provided with a retainer 34 made of heat resistant stainless steel or the like interposed between the first pad 3 and the first pad 3 as shown in FIGS. Yes. The retainer 34 allows the first pad 3 to slide smoothly, prevents the first pad 3 from vibrating and generates braking marks on the carrier 2 due to braking torque. It is provided for the purpose of preventing adhesion with the pad 3 due to rust.
[0025]
  The retainer 34 includes a main plate portion 35 along the torque receiving surface 13 of the forward torque receiving portion 12, an upper plate portion 36 along the upper surface portion 14, and a lower plate portion 37 along the lower surface portion 15. At the end of the portion 36 on the opposite side to the disk 1, there is provided a locking piece 38 that protrudes outward in the disk radial direction along the opposite side of the protrusion 16 of the first pad 3 to the disk 1. The lower plate portion 37 is also provided with a locking piece portion 39 that protrudes inward in the radial direction of the disk symmetrically with the locking piece portion 38. Here, the locking piece portion 38 prevents the first pad 3 from dropping off from the cylinder portion 25 side.
  Further, a locking portion 40 extending along a surface of the forward torque receiving portion 12 opposite to the disk 1 is provided at the end of the main plate portion 35 opposite to the disk 1. The end of the main plate 35 on the disk 1 side extends along the surface of the advance side torque receiving part 12 on the side of the disk 1, and the tip side is further to the first pad 3 of the advance side torque receiving part 12. A locking portion 41 that is bent along the opposite side is provided. The retainer 34 is prevented from coming off from the forward torque receiving portion 12 by these locking portions 40 and 41.
  As is clear from FIG. 1, a perpendicular drawn from the center of the first mounting hole 11 to the line connecting the center of the first mounting hole 11 and the center of the second mounting hole 20. A main pin hole 8 is formed at the overlapping position.
[0026]
According to the disc brake having such a configuration, the main pad is located on the short side portion 7 of the carrier 2 along the front end side of the first pad 3 in the disc rotation direction when the vehicle moves forward, and on the outer end in the disc radial direction. A main pin hole 8 for attachment is provided, and a first hole portion 11 for attachment to an attachment portion (not shown) is provided on the inner side in the radial direction of the disc than the main pin hole 8 and on the front end side in the disc rotation direction when the vehicle moves forward. Therefore, the distance between the first mounting hole 11 and the forward torque receiving portion 12 provided on the first pad 3 side on the inner side in the disk radial direction than the main pin hole 8 is growing. Therefore, since the stress when the torque from the first pad 3 is received by the forward torque receiving portion 12 can be reduced, it is not necessary to increase the thickness of the carrier 2 and the weight can be reduced.
[0027]
Further, since the forward side torque receiving portion 12 and the reverse side torque receiving portion 21 are provided on the short side portion 7 and the long side portion 6 of the carrier 2 so as to protrude in the direction of the disk 1, the thickness of the first pad 3 is increased. Without increasing the thickness, the distance between the carrier 2 and the disk 1 can be further increased, and these interferences can be prevented. Therefore, the weight can be further reduced.
[0028]
In addition, a forward-side torque receiving portion 12 that protrudes in the direction of the disc 1 is provided at an intermediate position of the short side portion 7 of the carrier 2 on the inner side of the main pin hole 8 in the disc radial direction and on the first pad 3 side. In addition, since the reverse side torque receiving portion 21 protruding in the direction of the disc 1 is provided at an intermediate position of the long side portion 6 of the carrier 2 on the outer side in the radial direction of the disc, these forward side torque receiving portions 12 are provided. And the other part of the carrier 2 exists in the both sides of the reverse side torque receiving part 21. Thus, when the carrier 2 is formed by bending the forward torque receiving portion 12 and the reverse torque receiving portion 21 of the material 2A punched by a press into a shape as shown in FIG. You can bend and hold. Therefore, deformation of the material due to bending can be prevented, and accuracy during bending can be ensured.
[0029]
Furthermore, by changing the amount of protrusion of the forward side torque receiving part 12 and the reverse side torque receiving part 21 in the disk axial direction, it is possible to cope with the case where the mounting shaft dimensions to the vehicle differ, and adopting a floating disk rotor It becomes possible to correspond to the vehicle that is.
[0030]
Further, the retainer 34 interposed between the forward side torque receiving portion 12 and the first pad 3 has a locking piece portion 38 along the opposite side to the disc 1 of the protrusion 16 of the first pad 3 on the outer side in the disc radial direction. Since the locking piece portion 38 of the retainer 34 extends toward the center in the width direction of the first pad 3 (right direction in FIG. 1), The position of the portion 38 can be further outside in the width direction of the first pad 3. Therefore, if the locking piece portion extends toward the center of the first pad 3 as in the prior art, the carrier 2 has to be enlarged to prevent interference between the caliper 24 and the retainer 34. This need is eliminated, the size of the carrier 2 can be minimized, and the weight can be further reduced.
[0031]
Further, the locking piece portion may be provided only at least in the locking piece portion 38 on the upper plate portion side 36 side. However, by providing the locking piece portion 39 also on the lower plate portion 37, the production mold is unified. In addition, it can be applied to ones with different left and right mounting directions, and there is a merit that the cost can be reduced, and reverse assembly does not occur.
[0032]
【The invention's effect】
  As detailed above, according to the disc brake of claim 1 of the present invention,The first pad protrudes toward the front end side of the disk in the disc rotation direction when the vehicle advances, at the intermediate position on the first pad side of the short side portion of the carrier substantially along the front end side of the disc rotation direction when the vehicle advances. A forward side that forms a torque receiving surface of one pad and guides a protrusion provided on the front end side of the first pad along the disk axial direction on the upper surface of the torque receiving surface located on the outer side in the radial direction of the disk. Since the torque receiving part is provided, the torque strength does not decrease as in the case where the forward side torque receiving part is formed with the guide groove at the intermediate position on the first pad side of the short side part, and sufficient strength is provided. You can have it.
[0033]
  Further, a long side portion of the first pad of the carrier that is substantially along the inner side in the radial direction of the disk is formed of a guide pin hole on the rear end side in the disk rotation direction when the vehicle moves forward, and a second mounting hole portion in the middle predetermined position. Since a reverse torque receiving portion that engages with the first pad in the disk radial direction is provided on the outer side in the disk radial direction, the forward torque receiving portion and the reverse torque receiving portion are separated from each other. This is advantageous in terms of strength and durability. That is, when the reverse side torque receiving part is provided in the vicinity of the forward side torque receiving part, the repeated stress in repeated braking in the forward / reverse direction is applied to substantially the same position of the first pad and the carrier, which is disadvantageous in terms of strength and durability. However, separating the forward torque receiving portion and the reverse torque receiving portion as described above is advantageous in terms of strength and durability.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin can be brought close to the center of the caliper cylinder. Therefore, the second pad and the caliper supported by the main pin can be reduced in size, and the caliper slidability can be improved.
In addition, a main pin hole is formed at a position overlapping with a perpendicular drawn from the center of the first mounting hole portion to the line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the force applied from the second pad to the main pin during forward braking of the vehicle becomes a component force and becomes small.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, even if it is necessary to secure the center-to-center distance between the first mounting hole and the main pin hole in order to avoid interference with the mounting part, the main pin hole position is used for mounting while avoiding interference with the mounting part. A line that follows the direction of the force applied to the main pin at the time of forward braking, which can be brought close to the second hole, and passes through the center of the main pin hole and the center of the first hole for mounting Can be shortened. Therefore, the moment applied to the mounting portion of the carrier can be further reduced, which is further advantageous in terms of strength.
[0034]
  According to the disc brake of the second aspect of the present invention, the vehicle of the first pad is positioned at the intermediate position on the first pad side of the short side portion of the carrier substantially along the front end side of the disc rotation direction when the first pad moves forward. Projecting toward the front end side of the disk rotation direction during forward movement to form the torque receiving surface of the first pad, and provided on the front end side of the first pad at the upper surface portion located on the outer side in the disk radial direction of the torque receiving surface Since the forward side torque receiving part that guides the protruding part along the disk axial direction is provided, the forward side torque receiving part is formed with a guide groove at an intermediate position on the first pad side of the short side part. Thus, the torque strength does not decrease and sufficient strength can be obtained.
  Also, on the long side of the first pad of the carrier that is substantially along the inner side of the disk in the radial direction of the disk, it is located on the outer side of the disk in the radial direction of the disk, and engages with the substantially central position of the inner side of the first pad in the radial direction of the disk. Since the reverse torque receiving portion is provided, the forward torque receiving portion and the reverse torque receiving portion are separated from each other, which is advantageous in terms of strength and durability. That is, when the reverse side torque receiving part is provided in the vicinity of the forward side torque receiving part, the repeated stress in repeated braking in the forward / reverse direction is applied to substantially the same position of the first pad and the carrier, which is disadvantageous in terms of strength and durability. However, separating the forward torque receiving portion and the reverse torque receiving portion as described above is advantageous in terms of strength and durability.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the main pin can be brought close to the center of the caliper cylinder. Therefore, the second pad and the caliper supported by the main pin can be reduced in size, and the caliper slidability can be improved.
In addition, a main pin hole is formed at a position overlapping with a perpendicular drawn from the center of the first mounting hole portion to the line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, the force applied from the second pad to the main pin during forward braking of the vehicle becomes a component force and becomes small.
  Further, a main pin hole is formed at a position overlapping a perpendicular line drawn from the center of the first mounting hole portion with respect to a line connecting the center of the first mounting hole portion and the center of the second mounting hole portion. Therefore, even if it is necessary to secure the center-to-center distance between the first mounting hole and the main pin hole in order to avoid interference with the mounting part, the main pin hole position is used for mounting while avoiding interference with the mounting part. A line that follows the direction of the force applied to the main pin at the time of forward braking, which can be brought close to the second hole, and passes through the center of the main pin hole and the center of the first hole for mounting Can be shortened. Therefore, the moment applied to the mounting portion of the carrier can be further reduced, which is further advantageous in terms of strength.
[Brief description of the drawings]
1 is a diagram showing a caliper and a first pad of a disc brake according to an embodiment of the present invention as viewed from the direction A in FIG.
FIG. 2 is a plan view showing a caliper of a disc brake according to an embodiment of the present invention.
FIG. 3 is a plan view showing a disc brake according to an embodiment of the present invention.
4 is a view from the direction A in FIG. 3 showing a disc brake according to an embodiment of the present invention.
5 is a diagram showing a caliper and a second pad of a disc brake according to an embodiment of the present invention as seen from the direction B in FIG. 3;
FIG. 6 is a plan sectional view showing a caliper and a retainer of a disc brake according to an embodiment of the present invention.
7 is a diagram showing a material of a caliper of a disc brake according to an embodiment of the present invention as seen from the direction A in FIG.
FIG. 8 is a front view showing an example of a caliper of a conventional disc brake.
FIG. 9 is a plan view showing an example of a caliper of a conventional disc brake.
[Explanation of symbols]
1 disc
2 career
3 First pad
4 Second pad
6 Long side
7 Short side
8 Main pin hole
9 Main pin
11 First mounting hole
12 Forward side torque receiver
16 Projection
18 Guide pin hole
19 Sliding guide pin
20 Second hole for mounting
21 Reverse side torque receiver
24 Caliper
28 Support pins
34 Retainer
38,39 Locking piece

Claims

A carrier disposed on one side of the disk and fixed to a non-rotating mounting portion of the vehicle;
A main pin attached to the carrier so as to be parallel to the axial direction of the disk, one end protruding beyond the outer periphery of the disk, and the other end protruding in the opposite direction to the disk;
A sliding guide pin attached to the carrier so as to be parallel to the axial direction of the disk and project in the opposite direction to the disk;
A first pad arranged oppositely on one side of the disk;
A second pad that is disposed opposite to the other surface side of the disk and has a guide hole that is guided and supported on one end side of the main pin on the front end side in the disk rotation direction when the vehicle moves forward,
A support pin that is slidably supported by the other end side of the main pin and the sliding guide pin, and that guides and supports the rear end side of the first pad and the second pad in the disk rotation direction when the vehicle advances. Is provided across the outer periphery of the disk in parallel to the disk axis direction, and the caliper that can hold the both pads from the opposite side to each disk,
A disc brake having
The carrier consists of a long side portion substantially along the inner side in the disk radial direction of the first pad, and a short side portion substantially along the front end side of the first pad in the disk rotation direction when the vehicle advances,
The short side portion includes a main pin hole for attaching the main pin at an end portion on the outer side in the radial direction of the disk, and a second portion for attaching to the mounting portion on the inner side in the radial direction of the disk from the position of the main pin hole. One hole and an intermediate position on the first pad side, inward of the disk radial direction from the main pin hole position, protrude toward the front end side in the disk rotation direction when the first pad is moving forward. A torque receiving surface of the first pad is formed, and a protrusion provided on the tip side of the first pad is guided along the disk axial direction at an upper surface portion located on the outer side in the disk radial direction of the torque receiving surface. And a forward side torque receiving portion to be provided,
The long side portion includes a guide pin hole for attaching the sliding guide pin on the rear end side in the disk rotation direction when the vehicle moves forward, and a second hole portion for attaching to the attachment portion at a predetermined position between the long side portion. And a reverse-side torque receiver engaged between the guide pin hole and the second mounting hole portion on the outer side in the disk radial direction and on the inner side in the disk radial direction of the first pad. Part is provided ,
The main pin hole is formed at a position overlapping a perpendicular drawn from the center of the first mounting hole with respect to a line connecting the center of the first mounting hole and the center of the second mounting hole. disc brakes, wherein being.

A carrier disposed on one side of the disk and fixed to a non-rotating mounting portion of the vehicle;
A main pin attached to the carrier so as to be parallel to the axial direction of the disk, one end protruding beyond the outer periphery of the disk, and the other end protruding in the opposite direction to the disk;
A sliding guide pin attached to the carrier so as to be parallel to the axial direction of the disk and project in the opposite direction to the disk;
A first pad arranged oppositely on one side of the disk;
A second pad that is disposed opposite to the other surface side of the disk and has a guide hole that is guided and supported on one end side of the main pin on the front end side in the disk rotation direction when the vehicle moves forward,
A support pin that is slidably supported by the other end side of the main pin and the sliding guide pin, and that guides and supports the rear end side of the first pad and the second pad in the disk rotation direction when the vehicle advances. Is provided across the outer periphery of the disk in parallel to the disk axis direction, and the caliper that can hold the both pads from the opposite side to each disk,
A disc brake having
The carrier consists of a long side portion substantially along the inner side in the disk radial direction of the first pad, and a short side portion substantially along the front end side of the first pad in the disk rotation direction when the vehicle advances,
The short side portion includes a main pin hole for attaching the main pin at an end portion on the outer side in the radial direction of the disk, and a second portion for attaching to the mounting portion on the inner side in the radial direction of the disk from the position of the main pin hole. One hole and an intermediate position on the first pad side, inward of the disk radial direction from the main pin hole position, protrude toward the front end side in the disk rotation direction when the first pad is moving forward. A torque receiving surface of the first pad is formed, and a protrusion provided on the tip side of the first pad is guided along the disk axial direction at an upper surface portion located on the outer side in the disk radial direction of the torque receiving surface. And a forward side torque receiving portion to be provided,
The long side portion is provided with a guide pin hole for attaching the sliding guide pin and a second hole portion for attachment to the attachment portion, and is located on the outer side in the radial direction of the disk, There is provided a reverse side torque receiving portion that engages with a substantially central position on the inner side in the disk radial direction of the pad ,
The main pin hole is formed at a position overlapping a perpendicular drawn from the center of the first mounting hole with respect to a line connecting the center of the first mounting hole and the center of the second mounting hole. disc brakes, wherein being.