JP3863870B2 - Split caliper body for vehicle disc brakes - Google Patents

Split caliper body for vehicle disc brakes Download PDF

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JP3863870B2
JP3863870B2 JP2003298165A JP2003298165A JP3863870B2 JP 3863870 B2 JP3863870 B2 JP 3863870B2 JP 2003298165 A JP2003298165 A JP 2003298165A JP 2003298165 A JP2003298165 A JP 2003298165A JP 3863870 B2 JP3863870 B2 JP 3863870B2
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disk
intermediate portion
divided
split
caliper body
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JP2004011917A (en
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小林  直樹
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Nissin Kogyo Co Ltd
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Nissin Kogyo Co Ltd
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Description

本発明は、自動車や自動二輪車等の走行車両に用いられる車両用ディスクブレーキに係り、詳しくは、ディスクブレーキに用いるキャリパボディが分割型であって、このキャリパボディを構成する分割ピースの結合構造に関する。   The present invention relates to a vehicle disc brake used for a traveling vehicle such as an automobile or a motorcycle, and more particularly, to a caliper body used for a disc brake, which is a split type, and a coupling structure of split pieces constituting the caliper body. .

分割型のキャリパボディを用いた車両用ディスクブレーキとして、キャリパボディをブリッジ部の中央部から分断して一対の分割ピースとし、両分割ピースのディスク回入側とディスク回出側及び中間部とに分けられた3つの接合面に、それぞれ連結ボルトをディスク軸方向に挿通して、双方の分割ピースをキャリパボディとして一体に連結したものが知られている(例えば、特許文献1参照)。 As a vehicle disc brake using a split-type caliper body, the caliper body is divided from the center portion of the bridge portion into a pair of split pieces, which are divided into a disc inlet side, a disc outlet side and an intermediate portion of both split pieces. There is known a structure in which connecting bolts are inserted through three divided joint surfaces in the disk axial direction, and both divided pieces are integrally connected as a caliper body (see, for example, Patent Document 1).

ディスクロータの両側部に配設される双方の分割ピースの作用部には、4個のシリンダ孔が対向して設けられ、該シリンダ孔のそれぞれにピストンを液密且つ移動可能に内挿して、各ピストンとシリンダ孔の底壁との間にそれぞれ液圧室を画成している。ブリッジ部の中央には2つの天井開口部がディスク周方向に並設されていて、双方の分割ピースの接合面は、天井開口部を挟んだディスク回入側及びディスク回出側と中間部との3つに分断されている。   Four cylinder holes are provided opposite to each other on the working parts of the two divided pieces disposed on both sides of the disk rotor, and a piston is inserted into each of the cylinder holes in a fluid-tight and movable manner, A hydraulic chamber is defined between each piston and the bottom wall of the cylinder hole. Two ceiling openings are arranged in the center of the bridge portion in the circumferential direction of the disk, and the joint surfaces of both divided pieces are the disk entry side, the disk delivery side, and the intermediate part across the ceiling opening. It is divided into three.

ディスク回入側とディスク回出側のいずれか一方の接合面には、液通路がディスクロータを挟んで対向する一対の液圧室に連通して設けられ、また中間部の接合面には、他の液通路が同じくディスクロータを挟んで対向する他の一対の液圧室に連通して設けられており、4個のピストンを2個づつ別々のブレーキ操作子によって作動する二系統用のキャリパボディとしている。
特公昭47−5164号公報
A liquid passage is provided on one of the joint surfaces of the disk inlet side and the disk outlet side so as to communicate with a pair of hydraulic chambers facing each other with the disk rotor interposed therebetween. Another fluid passage is provided in communication with another pair of fluid pressure chambers facing each other with the disc rotor in between, and the two pistons are operated by two brake actuators for each of the four pistons. The body.
Japanese Patent Publication No.47-5164

しかしながら、上述のディスク回入側とディスク回出側の接合面は、中間部の接合面から等距離の位置に同一面積で形成され、またディスク回入側とディスク回出側のいずれか一方の接合面と中間部の2つの接合面には、連結ボルトと液通路の2つづつが設けられることから、一方の接合面と中間部の接合面とのボルト間ピッチが、他方の接合面と中間部の接合面とのボルト間ピッチよりも長くなり、一方の接合面に連結ボルトの締付けトルクによって作用する連結強度が低下してしまう。   However, the above-described joining surfaces on the disk entry side and the disk delivery side are formed with the same area at the same distance from the joining surface of the intermediate portion, and either one of the disk entry side and the disk delivery side is formed. Since two joint bolts and two liquid passages are provided on the two joint surfaces of the joint surface and the intermediate portion, the pitch between the bolts of one joint surface and the joint surface of the intermediate portion is different from that of the other joint surface. It becomes longer than the pitch between bolts with the joining surface of the intermediate portion, and the connection strength acting on one joining surface by the tightening torque of the connecting bolt is reduced.

このため、キャリパボディの双方の作用部に、制動時のピストンから反ディスク方向の制動反力が作用して、キャリパボディがブリッジ部を支点にハの字状に開き変形しようとした場合に、剛性力の低下したブリッジ部の中間部から一方の接合面側が大きく撓み、一方の接合面側の液圧室が他方の接合面側よりも拡大して液圧損失を生じることがある。   For this reason, when the braking reaction force in the anti-disk direction from the piston during braking acts on both action parts of the caliper body, the caliper body tries to open and deform in a C shape with the bridge part as a fulcrum, One joint surface side may be greatly bent from the intermediate portion of the bridge portion where the rigidity is reduced, and the hydraulic chamber on one joint surface side may be larger than the other joint surface side, resulting in a hydraulic pressure loss.

また、上述の液圧室の拡大から、一方の接合面側のピストンが、制動操作の解除によってシリンダ孔の底部方向へ復帰する際に、シリンダ孔の奥部へ所定量以上に押し込まれるいわゆるノックバックを生じたり、ピストンストロークが延びて初期制動が若干立ち遅れることとなり、更に一方のブレーキ操作子では、遊びストロークが大きく且つ剛性感のないフワフワとした操作フィーリングとなる。   Also, because of the expansion of the hydraulic chamber described above, when the piston on one joint surface side returns to the bottom of the cylinder hole by releasing the braking operation, a so-called knock is pushed into the inner part of the cylinder hole by a predetermined amount or more. Backing occurs, the piston stroke is extended, and the initial braking is slightly delayed. Further, one brake operator has a large play stroke and a fluffy operation feeling without rigidity.

そこで本発明は、ボルト間ピッチが長く、連結ボルトの締付けトルクによる連結強度が低下した一方の接合面側にも充分な剛性力を確保して、上述の諸問題を解決することのできる車両用ディスクブレーキの分割型キャリパボディを提供することを目的としている。   Therefore, the present invention is for a vehicle that can solve the above-mentioned problems by ensuring a sufficient rigidity on one joint surface side where the pitch between bolts is long and the connection strength due to the tightening torque of the connection bolt is reduced. It aims to provide a split caliper body for disc brakes.

上述の目的に従って、本発明の第1は、図面の符号を用いて説明すると、キャリパボディ(3)が、ディスクロータ(2)の外側を跨ぐブリッジ部(3e)から一対の分割ピース(3a,3b)に分断され、両分割ピース(3a,3b)のディスク回入側とディスク回出側及び中間部とに分断された3つの接合面(3f,3g,3h)に、各々1本の連結ボルト(6a,6c,6b)をディスク軸方向に挿通して、前記一対の分割ピース(3a,3b)を一体に連結する分割型であって、前記ディスクロータ(2)の両側部に対向配置される双方の分割ピース(3a,3b)の作用部(3c,3d)のディスク回出側とディスク回入側とに各2個のシリンダ孔(7)を対向して設け、該シリンダ孔(7)のそれぞれにピストン(8)を液密且つ移動可能に内挿して、各ピストン(8)とシリンダ孔(7)の底壁との間にそれぞれ液圧室(9a,9b,10a,10b)を画成し、対向するディスク回出側の2つの液圧室(10a,10b)を連通する液通路(12a)を前記ディスク回出側の接合面(3g)に設け、対向するディスク回入側の2つの液圧室(9a,9b)を連通する液通路(11a)を前記中間部の接合面(3h)に設けた車両用ディスクブレーキの分割型キャリパボディであって、前記3本の連結ボルト(6a,6c,6b)及び前記2つの液通路(11a,12a)は前記ディスクロータ(2)の外周側で、且つ前記中間部の接合面(3h)の連結ボルト(6c)と前記液通路(11a)とでは連結ボルト(6c)をディスク回入側に、液通路(11a)をディスク回出側に、前記ディスク回出側の接合面(3g)の連結ボルト(6b)と前記液通路(12a)とでは連結ボルト(6b)をディスク回入側に、液通路(12a)をディスク回出側に、それぞれ横並びに並設して、前記ディスク回出側の接合面(3g)の面積を前記ディスク回入側の接合面(3f)の面積よりも大きく設定すると共に、前記ディスク回出側の接合面(3g)と中間部(3h)の接合面とのボルト間ピッチ(P1)を、ディスク回入側の接合面(3f)と中間部(3h)の接合面とのボルト間ピッチ(P2)よりも長く設定したことを特徴としている。また、本発明の第2は、キャリパボディ(3)が、ディスクロータ(2)の外側を跨ぐブリッジ部(3e)から一対の分割ピース(3a,3b)に分断され、両分割ピース(3a,3b)のディスク回入側とディスク回出側及び中間部とに分断された3つの接合面(3f,3g,3h)に、各々1本の連結ボルト(6a,6c,6b)をディスク軸方向に挿通して、前記一対の分割ピース(3a,3b)を一体に連結する分割型であって、前記ディスクロータ(2)の両側部に対向配置される双方の分割ピース(3a,3b)の作用部(3c,3d)のディスク回出側とディスク回入側とに各2個のシリンダ孔(7)を対向して設け、該シリンダ孔(7)のそれぞれにピストン(8)を液密且つ移動可能に内挿して、各ピストン(8)とシリンダ孔(7)の底壁との間にそれぞれ液圧室(9a,9b,10a,10b)を画成し、対向するディスク回入側の2つの液圧室(9a,9b)を連通する液通路を前記ディスク回入側の接合面(3f)に設け、対向するディスク回出側の2つの液圧室(10a,10b)を連通する前記とは別の液通路を前記中間部の接合面(3h)に設けた車両用ディスクブレーキの分割型キャリパボディであって、前記3本の連結ボルト(6a,6c,6b)及び前記2つの液通路(11a,12a)は前記ディスクロータ(2)の外周側で、且つ前記中間部の接合面(3h)の連結ボルト(6c)と液通路とでは当該液通路をディスク回入側に、連結ボルト(6c)をディスク回出側に、前記ディスク回入側の接合面(3f)の連結ボルト(6a)と液通路とでは当該液通路をディスク回入側に、連結ボルト(6a)をディスク回出側に、それぞれ横並びに並設して、前記ディスク回入出側の接合面(3f)の面積を前記ディスク回出側の接合面(3g)の面積よりも大きく設定すると共に、前記ディスク回入側の接合面(3f)と中間部(3h)の接合面とのボルト間ピッチを、ディスク回出側の接合面(3g)と中間部(3h)の接合面とのボルト間ピッチよりも長く設定したことを特徴としている。 According to the above-described object, the first aspect of the present invention will be described with reference to the drawings. The caliper body (3) is separated from the bridge portion (3e) straddling the outside of the disk rotor (2) by a pair of split pieces (3a, 3b) , each of the three pieces (3f, 3g, 3h) divided into the disk inlet side, the disk outlet side, and the intermediate part of both divided pieces (3a, 3b) . A split type in which the connecting bolts (6a, 6c, 6b) are inserted in the disk axial direction and the pair of split pieces (3a, 3b) are connected together, facing both sides of the disk rotor (2). Two cylinder holes (7) are respectively provided on the disk delivery side and the disk delivery side of the action portions (3c, 3d) of both divided pieces (3a, 3b) to be disposed, (7) Ekimitsu且the piston (8) to the respective By interpolation movably, respectively hydraulic pressure chamber between the bottom wall of each piston (8) and the cylinder bore (7) (9a, 9b, 10a, 10b) defines an opposing disk rotation exit side A fluid passage (12a) communicating the two fluid pressure chambers (10a, 10b) is provided in the joint surface (3g) on the disk delivery side, and the two fluid pressure chambers (9a, 9b) on the opposite side of the disk delivery side. A split caliper body for a vehicle disc brake in which a liquid passage (11a) communicating with the intermediate portion is provided in the joint surface (3h) of the intermediate portion , the three connecting bolts (6a, 6c, 6b) and the 2 The two liquid passages (11a, 12a) are on the outer peripheral side of the disk rotor (2), and the connecting bolt (6c) between the connecting bolt (6c) and the liquid passage (11a) on the joint surface (3h) of the intermediate portion. On the disk inlet side and the liquid passage (11a) The connecting bolt (6b) of the connecting surface (3g) on the disk outlet side and the liquid passage (12a) are connected to the disk outlet side, the connecting bolt (6b) is connected to the disk inlet side, and the liquid passage (12a) is provided. the outlet side disk rotation, each arranged side by side, as well as larger than the area of the junction surface of the disk rotation exit side area of the joint surface of the disk rotation entrance side of (3g) (3f), said disk The pitch between bolts (P1) between the joining surface (3g) on the delivery side and the joining surface of the intermediate portion (3h) is the bolt between the joining surface (3f) on the disk entry side and the joining surface of the intermediate portion (3h). It is characterized by being set longer than the interval pitch (P2) . Further, according to a second aspect of the present invention, the caliper body (3) is divided into a pair of divided pieces (3a, 3b) from a bridge portion (3e) straddling the outside of the disc rotor (2) , and both divided pieces (3a, 3b) are separated . 3b) , one connecting bolt (6a, 6c, 6b) is connected to the disk shaft on each of the three joint surfaces (3f, 3g, 3h) divided into the disk inlet side, the disk outlet side and the intermediate part. A split type that is inserted in the direction and integrally connects the pair of split pieces (3a, 3b) , both split pieces (3a, 3b) disposed opposite to both sides of the disk rotor (2 ) Two cylinder holes (7) are provided oppositely on the disk delivery side and the disk delivery side of the action portions (3c, 3d) of the cylinder, and a piston (8) is provided in each of the cylinder holes (7). dense and by interpolation movably, Siri and each piston (8) Defining respective fluid pressure chambers (9a, 9b, 10a, 10b) and between the bottom wall of da hole (7), communicating two liquid chambers of the disk rotation entrance side (9a, 9b) opposed A liquid passage is provided in the joint surface (3f) on the disk inlet side, and another liquid passage communicating with the two fluid pressure chambers (10a, 10b) on the opposite disk outlet side is joined to the intermediate portion. A split caliper body for a vehicle disc brake provided on a surface (3h) , wherein the three connecting bolts (6a, 6c, 6b) and the two liquid passages (11a, 12a) are connected to the disc rotor (2 ) And the connecting bolt (6c) and the liquid passage on the joint surface (3h) of the intermediate portion, the liquid passage is on the disk inlet side, and the connecting bolt (6c) is on the disk outlet side. The connecting bolt (6a) on the joint surface (3f) on the disk entry side and The liquid passage is a passage in the disk rotation entrance side, connecting bolt (6a) to the outlet side disk rotation, each arranged side by side, the area of the bonding surface of the disk rotation inlet and outlet (3f) wherein the disk times while larger than the area of the joint surface of the outlet side (3 g), the joint surface of the disk rotation entrance side (3f) and the intermediate portion of the bolt pitch between the bonding surface of the (3h), the junction of the disk rotation exit side It is characterized in that it is set longer than the pitch between bolts between the surface (3g) and the joint surface of the intermediate portion (3h) .

本発明によれば、ブリッジ部のディスク回入側又はディスク回出側の接合面のうち、中間部からのボルト間ピッチの長い方の接合面が、短い方の接合面よりも広い面積で突き合わされるので、制動反力に対する剛性力が高まり、他方の接合面側と同様にハの字変形を極力抑制することができる。これにより、ボルト間ピッチの長い方の接合面側では、短い方の接合面側と同様に、液圧室の拡大による液圧損失が殆どなく、液圧室に供給された作動液を有効に活かして効率の高い制動が行なえるようになり、またピストンのノックバックと、ピストンストロークの増大による初期制動の立ち遅れとを有効に防止することができ、しかもブレーキ操作子に余分な遊びストロークがなくなり、剛性感のある良好な操作フィーリングを持たせることができる。   According to the present invention, of the joining surfaces on the disk entry side or the disk delivery side of the bridge portion, the joining surface having the longer pitch between the bolts from the intermediate portion projects in a wider area than the shorter joining surface. Thus, the rigidity against the braking reaction force is increased, and the U-shaped deformation can be suppressed as much as the other joint surface side. As a result, there is almost no hydraulic loss due to expansion of the hydraulic pressure chamber on the joint surface side where the pitch between the bolts is long, and the hydraulic fluid supplied to the fluid pressure chamber is made effective as in the case of the shorter joint surface side. This makes it possible to perform highly efficient braking, effectively prevent piston knockback and initial braking delay due to increased piston stroke, and eliminate the extra play stroke in the brake operator. It is possible to have a good operation feeling with a sense of rigidity.

以下、本発明の一形態例を、図面に基づいて説明する。ディスクブレーキ1は、矢印A方向へ回転するディスクロータ2と、該ディスクロータ2の一側部で車体に取付けられるキャリパボディ3と、該キャリパボディ3の内部に、ディスクロータ2を挟んで対向配置される4枚の摩擦パッド4,4,5,5とからなっており、キャリパボディ3内のディスク回入側の2つの液圧室9a,9bとディスク回出側の2つの液圧室10a,10bを、それぞれ別々のブレーキ操作子(図示しない)によって液圧作動する二系統式となっている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The disc brake 1 includes a disc rotor 2 that rotates in the direction of arrow A, a caliper body 3 that is attached to the vehicle body at one side of the disc rotor 2, and a caliper body 3 that faces the disc rotor 2 with the disc rotor 2 interposed therebetween. The four friction pads 4, 4, 5, and 5 are formed in the caliper body 3. The two fluid pressure chambers 9 a and 9 b on the disk feed-in side and the two fluid pressure chambers 10 a on the disk feed-out side in the caliper body 3. , 10b are two systems that are hydraulically operated by separate brake operators (not shown).

キャリパボディ3は、ブリッジ部3eの中央部をディスク周方向に切断して一対の分割ピース3a,3bに分割され、両分割ピース3a,3bのディスク回入側とディスク回出側及び中間部の3箇所の接合面3f,3g,3hに、3本の連結ボルト6a,6b,6cをディスク軸方向に挿通して、双方の分割ピース3a,3bを一体に連結した分割型のキャリパボディで、一方の分割ピース3aに一体形成された車体取付け用のブラケット3i,3jを、図示しない車体にボルト止めにて固設されている。   The caliper body 3 is divided into a pair of divided pieces 3a and 3b by cutting the central portion of the bridge portion 3e in the circumferential direction of the disk, and the divided parts 3a and 3b have a disk feeding side, a disk feeding side, and an intermediate part. A split caliper body in which three connecting bolts 6a, 6b, 6c are inserted in the disk axial direction into the three joint surfaces 3f, 3g, 3h, and both split pieces 3a, 3b are connected integrally. Car body mounting brackets 3i and 3j integrally formed with one of the divided pieces 3a are fixed to a vehicle body (not shown) with bolts.

上記分割ピース3a,3bは、ブリッジ部3eの半分づつと、ディスクロータ2の両側部に配設される作用部3c,3dとよりなり、両作用部3c,3dにディスクロータ2を挟んで対向して設けられた4つの同径のシリンダ孔7に、それぞれピストン8が内挿されている。ピストン8とシリンダ孔7の底壁との間には液圧室9a,9b,10a,10bが画成されており、ディスクロータ2を挟んでディスク回入側の2つの液圧室9a,9bは液通路11a,11aにて連通し、ディスク回出側の2つの液圧室10a,10bは液通路12a,12aにて連通している。   Each of the divided pieces 3a and 3b includes half of the bridge portion 3e and action portions 3c and 3d disposed on both sides of the disc rotor 2, and faces both action portions 3c and 3d with the disc rotor 2 interposed therebetween. The pistons 8 are respectively inserted into the four cylinder holes 7 having the same diameter. Hydraulic chambers 9 a, 9 b, 10 a, 10 b are defined between the piston 8 and the bottom wall of the cylinder hole 7, and the two hydraulic chambers 9 a, 9 b on the disk inlet side with the disk rotor 2 interposed therebetween. Are communicated through the liquid passages 11a and 11a, and the two fluid pressure chambers 10a and 10b on the disk delivery side are communicated through the liquid passages 12a and 12a.

シリンダ孔7のそれぞれには、ピストン8と締まり嵌めを以て外嵌される角シール13とダストシール14とが設けられており、角シール14にて、ピストン8がシリンダ軸方向へ移動可能に保持され、また液圧室9a,9b,10a,10b内が液密にシールされると共に、ダストシール13にてシリンダ孔7へ塵埃や水が侵入しないようにしている。   Each cylinder hole 7 is provided with a square seal 13 and a dust seal 14 that are fitted to the piston 8 with an interference fit. The square seal 14 holds the piston 8 so as to be movable in the cylinder axial direction. Further, the insides of the hydraulic chambers 9a, 9b, 10a, 10b are sealed in a liquid-tight manner, and dust and water are prevented from entering the cylinder hole 7 by the dust seal 13.

各ピストン8は、先端をシリンダ孔7の開口部よりやや突出して配設され、これら4個のピストン8の前面に、前記摩擦パッド4,4,5,5が1枚づつ対応して設けられている。摩擦パッド4,5は、ライニング15と金属製の裏板16とからなっており、それぞれのライニング15をディスクロータ2側に向けながら、ディスクロータ2を挟んで対向する裏板16,16の上部にハンガーピン17を挿通して、ディスク軸方向へ移動可能に吊持されると共に、裏板16とハンガーピン17との間に縮設されたパッドスプリング18にてディスク内方向へ付勢されている。   Each piston 8 is arranged with its tip slightly protruding from the opening of the cylinder hole 7, and the friction pads 4, 4, 5, 5 are provided on the front surface of the four pistons 8, one by one. ing. The friction pads 4 and 5 are each composed of a lining 15 and a metal back plate 16, and the upper portions of the back plates 16 and 16 facing each other with the disc rotor 2 interposed therebetween, with each lining 15 facing the disc rotor 2 side. A hanger pin 17 is inserted through the hanger pin 17 and suspended so as to be movable in the disk axial direction. The pad spring 18 is provided between the back plate 16 and the hanger pin 17 so as to be urged inward in the disk. Yes.

分割ピース3a,3bに分断されたブリッジ部3eの中央部には、2つの天井開口部19,19が、摩擦パッド4,4,5,5をピストン8の前面へ抜き差しできる大きさでディスク周方向に並設されており、両天井開口部19,19の形成によって、天井開口部19,19を挟んだディスク回入側と回出側及び中間の3箇所に、前記接合面3f,3g,3hが分断されている。   At the center of the bridge portion 3e divided into the divided pieces 3a, 3b, two ceiling openings 19, 19 are sized so that the friction pads 4, 4, 5, 5 can be inserted into and removed from the front surface of the piston 8. The joint surfaces 3f, 3g, and 3g are arranged at three locations on the disk insertion side, the extraction side, and the intermediate portion sandwiching the ceiling openings 19, 19, by forming both ceiling openings 19, 19 in parallel. 3h is divided.

車体取付け側となる一方の分割ピース3aには、前記のブラケット3i,3jと液通路11a,12aのほか、作動液導入用のユニオン孔20a,20bと、分割ピース連結用のボルト孔21a,21b,21cとが設けられている。また他方の分割ピース3bには、前記の液通路11b,12bのほか、作動液中の混入エアを排出するためのブリーダ孔22a,22bと、分割ピース連結用のボルト孔21a,21b,21cとが設けられている。ブリーダ孔22a,22bは、中間部とディスク回出側の接合面3h,3gから突出するブリーダボス部3k,3mの上面に開口しており、これら開口部のそれぞれにブリーダスクリュ23が螺着されている。   In addition to the brackets 3i and 3j and the liquid passages 11a and 12a, the one divided piece 3a on the vehicle body mounting side has union holes 20a and 20b for introducing hydraulic fluid, and bolt holes 21a and 21b for connecting the divided pieces. , 21c. In addition to the liquid passages 11b and 12b, the other divided piece 3b includes bleeder holes 22a and 22b for discharging mixed air in the working fluid, and bolt holes 21a, 21b and 21c for connecting the divided pieces. Is provided. The bleeder holes 22a and 22b are opened on the upper surfaces of the bleeder boss portions 3k and 3m projecting from the joint portions 3h and 3g on the intermediate portion and the disk delivery side, and a bleeder screw 23 is screwed to each of these openings. Yes.

分割ピース3aのディスク回入側のユニオン孔20aは、ディスク回入側の液圧室9aに連通する液通路11aと共に中間部の接合面3hに開口し、ディスク回出側のユニオン孔20bは、ディスク回出側の液圧室10aに連通する液通路12aと共にディスク回出側の接合面3gに開口しており、更にディスク回入側と回出側及び中間部の3箇所の接合面3f,3g,3hに、めねじ孔によるボルト孔21a,21b,21cが穿設されている。   The union hole 20a on the disk entry side of the divided piece 3a opens in the intermediate joint surface 3h together with the liquid passage 11a communicating with the hydraulic chamber 9a on the disk entry side, and the union hole 20b on the disk delivery side A fluid passage 12a that communicates with the fluid delivery chamber 10a on the disk delivery side and an opening on the joint surface 3g on the disk delivery side, and three joint surfaces 3f on the disk delivery side, the delivery side, and the intermediate portion, Bolt holes 21a, 21b, and 21c are formed in 3g and 3h by female screw holes.

また分割ピース3bでは、ディスク回入側の液圧室9bに連通する液通路11aが一方のブリーダ孔22aと共に中間部の接合面3hに開口し、ディスク回出側の液圧室10bに連通する液通路12aが他方のブリーダ孔22bと共にディスク回出側の接合面3gに開口しており、更にディスク回入側と回出側及び中間部の3箇所の接合面3f,3g,3hに、連結ボルト6a〜6cよりも大径のボルト孔21a,21b,21cが穿設されている。   Further, in the divided piece 3b, a liquid passage 11a communicating with the hydraulic pressure chamber 9b on the disk feed-in side opens in the intermediate joint surface 3h together with one bleeder hole 22a, and communicates with the hydraulic pressure chamber 10b on the disk feed-out side. The liquid passage 12a is opened to the joint surface 3g on the disk delivery side together with the other bleeder hole 22b, and further connected to the joint surfaces 3f, 3g, and 3h on the disk delivery side, the delivery side, and the intermediate portion. Bolt holes 21a, 21b, and 21c having a diameter larger than that of the bolts 6a to 6c are formed.

各分割ピース3a,3bのディスク回出側の接合面3gと中間部の接合面3hには、ボルト孔21aのみが形成されるディスク回入側の接合面3fに対して、ボルト孔21aに液通路12aまたは液通路11aが横並びに並設されることから、ディスク回出側のボルト孔21bと中間部のボルト孔21cの中心間距離、即ちディスク回出側と中間部の連結ボルト6b,6cのピッチP1は、ディスク回入側のボルト孔21aと中間部のボルト孔21cの中心間距離、即ちディスク回入側と中間部の連結ボルト6a,6c間のピッチP2よりも必然的に長くなる。   In the joining surface 3g on the disk delivery side and the joining surface 3h on the intermediate part of each divided piece 3a, 3b, the liquid is placed in the bolt hole 21a with respect to the joining surface 3f on the disk entry side in which only the bolt hole 21a is formed. Since the passage 12a or the liquid passage 11a is arranged side by side, the distance between the centers of the bolt hole 21b on the disk delivery side and the bolt hole 21c on the intermediate part, that is, the connecting bolts 6b, 6c on the disk delivery side and the intermediate part. The pitch P1 is inevitably longer than the center-to-center distance between the disk insertion side bolt hole 21a and the intermediate bolt hole 21c, that is, the pitch P2 between the disk insertion side and the intermediate connection bolts 6a and 6c. .

このため、ブリッジ部3eのディスク回出側では、ディスク回出側と中間部の連結ボルト6b,6cの締付けトルクによる連結強度がディスク回入側よりも低くなるが、本形態例では、分割ピース3a,3b双方のディスク回出側の接合面3g,3gを、ディスク回入側の接合面3fの凡そ2倍の面積で形成しており、ディスク回出側にディスク回入側の接合面3fよりも面積の大きな双方の接合面3g,3gを突き合わせることによって、ブリッジ部3eのディスク回出側に、制動反力に対する高い剛性力が確保されている。   For this reason, on the disk delivery side of the bridge portion 3e, the connection strength due to the tightening torque of the connection bolts 6b and 6c on the disk delivery side and the intermediate part is lower than that on the disk delivery side. The joint surfaces 3g, 3g on both sides of the disk 3a, 3b are formed in an area approximately twice as large as the joint surface 3f on the disk entry side, and the joint surface 3f on the disk entry side is formed on the disk delivery side. By abutting both joint surfaces 3g, 3g having a larger area, a high rigidity force against a braking reaction force is ensured on the disk delivery side of the bridge portion 3e.

次に、以上のように構成される本形態例の作動を説明する。2つのユニオン孔20a,20bには、運転者の制動操作によって、ブレーキ系統毎の液圧マスタシリンダで昇圧された作動液が供給される。ディスク回入側のユニオン孔20aに導入された作動液は、液通路11a,11aを分岐して液圧室9a,9bに入り、ピストン8,8をシリンダ孔7の開口部方向へ押動して、前面の摩擦パッド4のライニング15をディスクロータ2の側面へ押圧する。また、ディスク回出側のユニオン孔20bに導入された作動液は、液通路12a,12aを分岐して液圧室10a,10bに入り、ピストン8,8をシリンダ孔7の開口部方向へ押動して、前面の摩擦パッド5のライニング15をディスクロータ2の側面へ押圧する。   Next, the operation of this embodiment configured as described above will be described. The two union holes 20a and 20b are supplied with hydraulic fluid that has been pressurized by a hydraulic master cylinder for each brake system by a driver's braking operation. The hydraulic fluid introduced into the union hole 20a on the disk entry side branches the liquid passages 11a and 11a and enters the hydraulic chambers 9a and 9b, and pushes the pistons 8 and 8 toward the opening of the cylinder hole 7. Thus, the lining 15 of the front friction pad 4 is pressed against the side surface of the disk rotor 2. The hydraulic fluid introduced into the union hole 20b on the disk delivery side branches the liquid passages 12a and 12a and enters the hydraulic chambers 10a and 10b, and pushes the pistons 8 and 8 toward the opening of the cylinder hole 7. The lining 15 of the front friction pad 5 is pressed against the side surface of the disk rotor 2.

制動時の作用部3c,3dには、それぞれピストン8,8から反ディスク方向の制動反力が作用し、キャリパボディ3がブリッジ部3eを支点にハの字状に開き変形しようとするが、ブリッジ部3eの中間部からディスク回入側では、ボルト間ピッチP2の短いディスク回入側と中間部の連結ボルト6a,6cの締付けトルクによる大きな連結強度が作用してハの字変形を極力抑制する。また、ボルト間ピッチP1の長いブリッジ部3eの中間部からディスク回出側では、ディスク回入側の接合面3fよりも大きなディスク回出側の接合面3g,3gが広い面積で突き合わされるので、制動反力に対する剛性力が高まり、ディスク回入側と同様にハの字変形を極力抑制することができる。   A braking reaction force in the anti-disk direction acts from the pistons 8 and 8 on the action portions 3c and 3d at the time of braking, respectively, and the caliper body 3 tries to open and deform in a C shape with the bridge portion 3e as a fulcrum. On the disk entry side from the intermediate part of the bridge portion 3e, the disk connection side with a short bolt pitch P2 and the large connection strength due to the tightening torque of the connection bolts 6a and 6c at the intermediate part act to suppress the C-shaped deformation as much as possible. To do. Further, on the disk delivery side from the intermediate part of the bridge portion 3e having a long pitch P1 between the bolts, the joining surfaces 3g and 3g on the disk delivery side larger than the joining surface 3f on the disk delivery side are abutted in a wide area. As a result, the rigidity against the braking reaction force is increased, and the U-shaped deformation can be suppressed as much as possible in the same manner as the disk insertion side.

これにより、ディスク回出側のブレーキ系統では、ディスク回入側のブレーキ系統と同様に、液圧室9a,9bの拡大による液圧損失が殆どなく、両液圧室9a,9bに供給された作動液を有効に活かして効率の高い制動が行なえるようになり、またピストン8のノックバックと、ピストンストロークの増大による初期制動の立ち遅れとを有効に防止することができ、しかもディスク回出側のブレーキ系統のブレーキ操作子に、ディスク回入側のブレーキ系統と同様剛性感のある良好な操作フィーリングを持たせることができる。   As a result, in the brake system on the disk delivery side, as with the brake system on the disk delivery side, there is almost no fluid pressure loss due to the expansion of the fluid pressure chambers 9a and 9b, and the fluid is supplied to both fluid pressure chambers 9a and 9b. The hydraulic fluid can be effectively utilized to perform highly efficient braking, and the knockback of the piston 8 and the delay of the initial braking due to the increase of the piston stroke can be effectively prevented. The brake operator of this brake system can have a good operation feeling with rigidity as in the brake system on the disk entry side.

尚、上記の形態例では、二系統用のキャリパボディで説明したが、本発明は系統数に拘りなく、ディスク回入側及びディスク回出側の接合面のうち、少なくともいずれかに1つに液通路があって、ディスク回入側及びディスク回出側と中間部との3つの接合面のボルト間ピッチが異なるキャリパボディであれば、適用が可能である。   In the above embodiment, the caliper body for two systems has been described. However, the present invention is not limited to the number of systems, and at least one of the joining surfaces on the disk entry side and the disk delivery side is provided. The present invention can be applied to any caliper body having a liquid passage and having different pitches between bolts on the three joint surfaces of the disk inlet side, the disk outlet side, and the intermediate portion.

本発明の一形態例を示す図2のI−I断面図FIG. 2 is a cross-sectional view taken along the line II in FIG. 本発明の一形態例を示すディスクブレーキの一部切欠き平面図1 is a partially cutaway plan view of a disc brake showing an embodiment of the present invention. 本発明の一形態例を示すディスクブレーキの正面図The front view of the disc brake which shows one example of this invention 本発明の一形態例を示す図3のIV−IV断面図IV-IV sectional view of FIG. 3 showing an example of the present invention 本発明の一形態例を示す図3のV−V断面図VV sectional view of FIG.

符号の説明Explanation of symbols

1…液圧式のディスクブレーキ、2…ディスクロータ、3…キャリパボディ、3a,3b…分割ピース、3c,3d…作用部、3e…ブリッジ部、3f…ディスク回入側の接合面、3g…ディスク回出側の接合面、3h…中間部の接合面、4,5…摩擦パッド、6a,6b,6c…連結ボルト、9a,9b,10a,10b…液圧室、11a,12a…液通路、15…摩擦パッド4,5のライニング、16…摩擦パッド4,5の裏板、19…天井開口部、21a,21b,21c…ボルト孔、A…ディスクロータ2の回転方向、P1…ディスク回出側と中間部の連結ボルト6b,6cのピッチ、P2…ディスク回入側と中間部の連結ボルト6a,6cのピッチ     DESCRIPTION OF SYMBOLS 1 ... Hydraulic type disc brake, 2 ... Disc rotor, 3 ... Caliper body, 3a, 3b ... Divided piece, 3c, 3d ... Action part, 3e ... Bridge part, 3f ... Joining surface on the disk entrance side, 3g ... Disc Bonding surface on the delivery side, 3h ... joining surface in the middle part, 4,5 ... friction pad, 6a, 6b, 6c ... connecting bolt, 9a, 9b, 10a, 10b ... hydraulic chamber, 11a, 12a ... liquid passage, DESCRIPTION OF SYMBOLS 15 ... Lining of the friction pads 4 and 5 16 ... Back plate of the friction pads 4 and 5 19 ... Ceiling opening part, 21a, 21b, 21c ... Bolt hole, A ... Rotation direction of the disc rotor 2, P1 ... Disc rotation Pitch of connecting bolts 6b and 6c on the side and the intermediate part, P2... Pitch of connecting bolts 6a and 6c on the disk feed-in side and the intermediate part

Claims (2)

キャリパボディ(3)が、ディスクロータ(2)の外側を跨ぐブリッジ部(3e)から一対の分割ピース(3a,3b)に分断され、両分割ピース(3a,3b)のディスク回入側とディスク回出側及び中間部とに分断された3つの接合面(3f,3g,3h)に、各々1本の連結ボルト(6a,6c,6b)をディスク軸方向に挿通して、前記一対の分割ピース(3a,3b)を一体に連結する分割型であって、前記ディスクロータ(2)の両側部に対向配置される双方の分割ピース(3a,3b)の作用部(3c,3d)のディスク回出側とディスク回入側とに各2個のシリンダ孔(7)を対向して設け、該シリンダ孔(7)のそれぞれにピストン(8)を液密且つ移動可能に内挿して、各ピストン(8)とシリンダ孔(7)の底壁との間にそれぞれ液圧室(9a,9b,10a,10b)を画成し、対向するディスク回出側の2つの液圧室(10a,10b)を連通する液通路(12a)を前記ディスク回出側の接合面(3g)に設け、対向するディスク回入側の2つの液圧室(9a,9b)を連通する液通路(11a)を前記中間部の接合面(3h)に設けた車両用ディスクブレーキの分割型キャリパボディであって、前記3本の連結ボルト(6a,6c,6b)及び前記2つの液通路(11a,12a)は前記ディスクロータ(2)の外周側で、且つ前記中間部の接合面(3h)の連結ボルト(6c)と前記液通路(11a)とでは連結ボルト(6c)をディスク回入側に、液通路(11a)をディスク回出側に、前記ディスク回出側の接合面(3g)の連結ボルト(6b)と前記液通路(12a)とでは連結ボルト(6b)をディスク回入側に、液通路(12a)をディスク回出側に、それぞれ横並びに並設して、前記ディスク回出側の接合面(3g)の面積を前記ディスク回入側の接合面(3f)の面積よりも大きく設定すると共に、前記ディスク回出側の接合面(3g)と中間部(3h)の接合面とのボルト間ピッチ(P1)を、ディスク回入側の接合面(3f)と中間部(3h)の接合面とのボルト間ピッチ(P2)よりも長く設定したことを特徴とする車両用ディスクブレーキの分割型キャリパボディ。 The caliper body (3) is divided into a pair of divided pieces (3a, 3b) from the bridge portion (3e) straddling the outside of the disk rotor (2) , and the disk entry side and the disk of both divided pieces (3a, 3b) One connecting bolt (6a, 6c, 6b) is inserted through the three joint surfaces (3f, 3g, 3h) divided into the delivery side and the intermediate portion in the disk axial direction, and the pair of pairs split pieces (3a, 3b) of a split type connecting together, the working portion of both split pieces disposed to face both sides of the disc rotor (2) (3a, 3b) of (3c, 3d) Two cylinder holes (7) are provided opposite to each other on the disk delivery side and the disk delivery side, and a piston (8) is inserted into each of the cylinder holes (7) in a liquid-tight and movable manner, each piston (8) and the bottom wall of the cylinder bore (7) Each hydraulic chamber in (9a, 9b, 10a, 10b ) fraction forms the opposing disk rotation exit side of the two hydraulic chambers (10a, 10b) and the delivery side of the fluid passage communicating (12a) the disk rotation The vehicle disc is provided with a fluid passage (11a) provided on the joining surface (3g) of the intermediate portion and a fluid passage (11a) communicating the two fluid pressure chambers (9a, 9b) on the opposite side of the disc feeding side. A split caliper body for a brake, wherein the three connecting bolts (6a, 6c, 6b) and the two liquid passages (11a, 12a) are on the outer peripheral side of the disk rotor (2) and the intermediate portion The connecting bolt (6c) on the joint surface (3h) and the liquid passage (11a) have the connecting bolt (6c) on the disk inlet side, the liquid passage (11a) on the disk outlet side, and the disk outlet side. Connecting bolt (6 g) ) Said fluid passage (12a) and at the connection bolt (6b) into the disk rotation entrance side and a fluid passage (12a) on the outlet side disk rotation, each arranged side by side, the bonding surface of side exit the disk rotation area bonding surfaces of the disk rotation entrance side of (3 g) as well as larger than the area of the (3f), between the bolt and the joint surface of the disk rotation exit side (3 g) and the bonding surface of the intermediate portion (3h) The split type of a vehicle disc brake characterized in that the pitch (P1) is set longer than the pitch (P2) between bolts of the joining surface (3f ) on the disk entry side and the joining surface of the intermediate portion (3h). Caliper body. キャリパボディ(3)が、ディスクロータ(2)の外側を跨ぐブリッジ部(3e)から一対の分割ピース(3a,3b)に分断され、両分割ピース(3a,3b)のディスク回入側とディスク回出側及び中間部とに分断された3つの接合面(3f,3g,3h)に、各々1本の連結ボルト(6a,6c,6b)をディスク軸方向に挿通して、前記一対の分割ピース(3a,3b)を一体に連結する分割型であって、前記ディスクロータ(2)の両側部に対向配置される双方の分割ピース(3a,3b)の作用部(3c,3d)のディスク回出側とディスク回入側とに各2個のシリンダ孔(7)を対向して設け、該シリンダ孔(7)のそれぞれにピストン(8)を液密且つ移動可能に内挿して、各ピストン(8)とシリンダ孔(7)の底壁との間にそれぞれ液圧室(9a,9b,10a,10b)を画成し、対向するディスク回入側の2つの液圧室(9a,9b)を連通する液通路を前記ディスク回入側の接合面(3f)に設け、対向するディスク回出側の2つの液圧室(10a,10b)を連通する前記とは別の液通路を前記中間部の接合面(3h)に設けた車両用ディスクブレーキの分割型キャリパボディであって、前記3本の連結ボルト(6a,6c,6b)及び前記2つの液通路(11a,12a)は前記ディスクロータ(2)の外周側で、且つ前記中間部の接合面(3h)の連結ボルト(6c)と液通路とでは当該液通路をディスク回入側に、連結ボルト(6c)をディスク回出側に、前記ディスク回入側の接合面(3f)の連結ボルト(6a)と液通路とでは当該液通路をディスク回入側に、連結ボルト(6a)をディスク回出側に、それぞれ横並びに並設して、前記ディスク回入出側の接合面(3f)の面積を前記ディスク回出側の接合面(3g)の面積よりも大きく設定すると共に、前記ディスク回入側の接合面(3f)と中間部(3h)の接合面とのボルト間ピッチを、ディスク回出側の接合面(3g)と中間部(3h)の接合面とのボルト間ピッチよりも長く設定したことを特徴とする車両用ディスクブレーキの分割型キャリパボディ。 The caliper body (3) is divided into a pair of divided pieces (3a, 3b) from the bridge portion (3e) straddling the outside of the disk rotor (2) , and the disk entry side and the disk of both divided pieces (3a, 3b) One connecting bolt (6a, 6c, 6b) is inserted through the three joint surfaces (3f, 3g, 3h) divided into the delivery side and the intermediate portion in the disk axial direction, and the pair of pairs split pieces (3a, 3b) of a split type connecting together, the working portion of both split pieces disposed to face both sides of the disc rotor (2) (3a, 3b) of (3c, 3d) Two cylinder holes (7) are provided opposite to each other on the disk delivery side and the disk delivery side, and a piston (8) is inserted into each of the cylinder holes (7) in a liquid-tight and movable manner, each piston (8) and the bottom wall of the cylinder bore (7) Defining respective fluid pressure chambers (9a, 9b, 10a, 10b ) to the bonding surfaces of the two hydraulic chambers (9a, 9b) wherein a fluid passage which communicates disc times the inlet side of the opposing disk rotation to the entry side (3f) and a disc brake for a vehicle in which another fluid passage communicating with the two fluid pressure chambers (10a, 10b) on the disk delivery side facing each other is provided on the joint surface (3h) of the intermediate portion. Divided caliper bodies, wherein the three connecting bolts (6a, 6c, 6b) and the two liquid passages (11a, 12a) are arranged on the outer peripheral side of the disk rotor (2) and at the intermediate portion. Of the connecting bolt (6c) and the liquid passage on the joining surface (3h), the liquid passage is on the disk entry side, the connection bolt (6c) is on the disk delivery side, and the joining surface (3f) on the disk entry side is The liquid passage between the connecting bolt (6a) and the liquid passage The disk rotation entrance side, connecting bolt (6a) to the outlet side disk rotation, each arranged side by side, the bonding surface area of the disk rotation exit side of the bonding surface of the disk rotation inlet and outlet (3f) (3 g while larger than the area of) the bonding surface of the disk rotation entrance side (3f) and the intermediate portion of the bolt pitch between the bonding surface of the (3h), the bonding surface of the disk rotation exit side (3 g) and intermediate portion A split caliper body for a disk brake for a vehicle, wherein the split brake caliper body is set to be longer than a pitch between bolts to a joint surface of (3h) .
JP2003298165A 2003-08-22 2003-08-22 Split caliper body for vehicle disc brakes Expired - Lifetime JP3863870B2 (en)

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