JP2005106191A

JP2005106191A - Disk brake

Info

Publication number: JP2005106191A
Application number: JP2003340765A
Authority: JP
Inventors: Yoshiki Matsuzaki; 善樹松崎
Original assignee: Advics Co Ltd
Current assignee: Advics Co Ltd
Priority date: 2003-09-30
Filing date: 2003-09-30
Publication date: 2005-04-21

Abstract

<P>PROBLEM TO BE SOLVED: To restrict the generation of squeal of a brake when braking by stabilizing posture of a pad so that the pad slidably supported in the radial direction of the disk by suspending with a plurality of pad pins is not constrained by the pad pins. <P>SOLUTION: An elastic member 10 is arranged between pin holes 5 and 5 provided in an inner part 1i and an outer part 1o of a caliper 1 and the pad pins 3, and the pad pin 3 is floated from a hole surface of each of the pin holes 5, while supporting the elastic member 10 with the pad pins 3. The pad pin 3 can be moved to a position wherein the pad pin is constrained by the hole surface of the pin hole 5, while elastically deforming the elastic member 10. With this structure, the pad 4 can freely move in the radial direction of the pin, and adhesiveness of a torque transmission part 8 to a torque receiver part 7 (posture of the pad) is improved to reduce the generation of squeal when braking. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、パッドピンで支持したパッドにパッドピン径方向への動きの自由度を与えて制動時のいわゆる鳴き（スキール音など）を抑制したディスクブレーキに関する。 The present invention relates to a disc brake in which a pad supported by pad pins is given freedom of movement in the pad pin radial direction to suppress so-called squealing (squealing noise, etc.) during braking.

例えば、対向配置したパッドをキャリパのインナー側とアウター側にそれぞれ設けたピストンで別々に押圧してディスク（ディスクロータをこの発明ではディスクと言う）に摺接させるピストン対向型ディスクブレーキは、通常、パッドを２本のパッドピンで支持している。 For example, a piston-facing disc brake that presses the pads arranged opposite to each other with pistons provided on the inner side and the outer side of the caliper and makes sliding contact with the disc (the disc rotor is referred to as a disc in the present invention) is usually The pad is supported by two pad pins.

図７に示すように、キャリパ１のインナー部１ｉとアウター部１ｏに対応して設けたピン孔５、５にパッドピン３を通し、このパッドピン３をキャリパ１の窓孔部に横架して２本設け、その２本のパッドピン３をパッド裏板４ａに設けたピン孔６に遊嵌してパッド４をディスク軸方向スライド自在に支持している。 As shown in FIG. 7, a pad pin 3 is passed through pin holes 5 and 5 provided corresponding to the inner part 1i and the outer part 1o of the caliper 1, and the pad pin 3 is horizontally mounted on the window hole part of the caliper 1 to 2 The two pad pins 3 are provided and loosely fitted into pin holes 6 provided in the pad back plate 4a to support the pads 4 so as to be slidable in the disk axial direction.

この構造は、下記特許文献１などに示されている。
実開平４−９７１２８号公報 This structure is shown in Patent Document 1 below.
Japanese Utility Model Publication No. 4-97128

パッド４には、制動時に加わる制動トルクをキャリパ１に設けたトルク受け部７で受け止めるために、トルク受け部７との間の隙間（パッドクリアランスＣ）を吸収し得る動き代を与えている（図８参照）。その動き代は、パッド裏板４ａに設けるピン孔６を通常図８に示すような長孔にして生じさせているが、金属製のパッドピン３が金属製のキャリパ１とパッド裏板４ａに直に接触する従来の構造では、パッドピン３の動きの自由度が小さく、そのパッドピン３に金属接触したパッド４の動きの自由度も小さくなるため、パッド４がパッドピン３に拘束されて制動時に安定した姿勢をとれないことがある。 In order to receive the braking torque applied at the time of braking with the torque receiving part 7 provided in the caliper 1, the pad 4 is given a movement allowance that can absorb a gap (pad clearance C) between the pad 4 and the torque receiving part 7 ( (See FIG. 8). The movement allowance is generated by making the pin hole 6 provided in the pad back plate 4a into a long hole as shown in FIG. 8, but the metal pad pin 3 is directly connected to the metal caliper 1 and the pad back plate 4a. In the conventional structure that contacts the pad pin 3, the degree of freedom of movement of the pad pin 3 is small, and the degree of freedom of movement of the pad 4 that is in metal contact with the pad pin 3 is also small, so that the pad 4 is restrained by the pad pin 3 and stabilized during braking. You may not be able to take a posture.

ピストン対向型ディスクブレーキは、トルク受け部７の設置領域を図８に示すようにパッド４のライニング４ｂの内周から外周まで広げて制動中のパッド姿勢の安定化を図っている。 In the piston-facing disc brake, the installation area of the torque receiving portion 7 is expanded from the inner periphery to the outer periphery of the lining 4b of the pad 4 as shown in FIG. 8 to stabilize the pad posture during braking.

しかしながら、パッド４に設けるピン孔６、６とトルク伝達部８との直角度およびキャリパ１に設ける図７のピン孔５、５とトルク受け部７との直角度には各々公差があり、その公差により、図９に示すように、制動に伴ってトルク伝達部８（パッド裏板４ａの側面）の一部がトルク受け部７に当たったときにトルク伝達部８の他の一部はトルク受け部７から離れたままになることがある。この場合、パッド４は、トルク伝達部８の全域がトルク受け部７に当たるところまで図９の矢印方向に回転しようとするが、上述したようにパッドピン３とパッド４の動きの自由度が小さいとパッド４が２本のパッドピン３に拘束されて十分に回転できず、そのためにトルク受け部７に対するトルク伝達部８の当接が不十分になることがあり、このときに鳴きが発生する。 However, the perpendicularity between the pin holes 6 and 6 provided in the pad 4 and the torque transmitting portion 8 and the perpendicularity between the pinholes 5 and 5 and the torque receiving portion 7 shown in FIG. Due to the tolerance, as shown in FIG. 9, when a part of the torque transmission part 8 (side surface of the pad back plate 4a) hits the torque receiving part 7 due to braking, the other part of the torque transmission part 8 is torque. It may remain away from the receiving part 7. In this case, the pad 4 tries to rotate in the direction of the arrow in FIG. 9 until the entire area of the torque transmitting portion 8 hits the torque receiving portion 7. However, as described above, if the degree of freedom of movement of the pad pin 3 and the pad 4 is small The pad 4 is constrained by the two pad pins 3 and cannot sufficiently rotate, so that the contact of the torque transmitting portion 8 with the torque receiving portion 7 may be insufficient, and a squeal occurs at this time.

この発明は、パッドがパッドピンに拘束されないようにして制動時にパッドの姿勢の安定化を図り、それによって制動時のブレーキの鳴きを抑えることを課題としている。 An object of the present invention is to stabilize the posture of the pad during braking so that the pad is not restrained by the pad pin, thereby suppressing the squealing of the brake during braking.

上記の課題を解決するため、この発明においては、キャリパの窓穴部に複数本のパッドピンを横架して設け、各パッドピンをパッド裏板に設けたピン孔に遊嵌してパッドをパッドピンでディスク軸方向スライド可能に支持するディスクブレーキにおいて、キャリパに設けたピン孔とパッドピンとの間又はパッド裏板に設けたピン孔とパッドピンとの間もしくはその両方に弾性部材を配置し、その弾性部材でパッドピンを支えてパッドピンをピン孔の孔面から浮き上がらせた。 In order to solve the above-mentioned problems, in the present invention, a plurality of pad pins are provided horizontally in the window hole portion of the caliper, and each pad pin is loosely fitted in a pin hole provided in the pad back plate so that the pad is pad pad-attached. In a disc brake that is slidably supported in the disc axial direction, an elastic member is disposed between a pin hole and a pad pin provided in the caliper or between a pin hole and a pad pin provided in a pad back plate, or both, and the elastic member. The pad pin was lifted from the hole surface of the pin hole by supporting the pad pin.

弾性部材は、キャリパやパッドに固定してもよく、パッドピンに固定することもできる。コスト的にはパッドピンに固定する方が有利であるが、パッドピンに固定する場合にはパッドのスライドの妨げとならないように注意する。 The elastic member may be fixed to a caliper or a pad, or may be fixed to a pad pin. In terms of cost, it is more advantageous to fix to the pad pin, but when fixing to the pad pin, care should be taken not to disturb the sliding of the pad.

この弾性部材の力でパッドピンがピン孔の中心にセンタリングされるようにしておくと好ましい。 It is preferable that the pad pin is centered at the center of the pin hole by the force of the elastic member.

また、弾性部材をキャリパに設けたピン孔とパッドピンとの間に配置する場合には、ピン孔の内面とパッドピンの外周に環状溝を対応して設け、その対応した環状溝の双方に弾性部材を係止させることができる。 Further, when the elastic member is disposed between the pin hole provided in the caliper and the pad pin, an annular groove is provided corresponding to the inner surface of the pin hole and the outer periphery of the pad pin, and the elastic member is provided in both of the corresponding annular groove. Can be locked.

なお、パッドピンのピン孔の孔面からの浮き上がり量は、前記トルク伝達部の一端がトルク受け部に接したときに前記トルク伝達部の他端とトルク受け部との間に生じる最大隙間（これはパッドとキャリパの加工公差によって生じる）をＣ_MAXとして、前記弾性部材の弾性変形によって前記Ｃ_MAXの隙間を吸収し得る動き代がパッドに与えられるように設定する。 Note that the amount of lift from the pin hole surface of the pad pin is the maximum clearance (this is generated between the other end of the torque transmitting portion and the torque receiving portion when one end of the torque transmitting portion is in contact with the torque receiving portion. It is a caused by machining tolerances between the pad and the caliper) as C _MAX, motion allowance capable of absorbing the clearance of the C _MAX by elastic deformation of the elastic member is set as given pad.

この発明のディスクブレーキは、パッドピンがピン孔との間に介在した弾性部材の力でピン孔の孔面から浮き上がり、このパッドピンにピン径方向への動きの自由度が生じる。この状態で制動がなされると、パッドはピン孔との間に配置した弾性部材を弾性変形させて動き、パッドピンによる拘束を受けることなくトルク伝達部の全域がトルク受け部に接触する。従って、パッドの姿勢が安定し、制動時の鳴きが低減される。 In the disc brake according to the present invention, the pad pin is lifted from the hole surface of the pin hole by the force of the elastic member interposed between the pin hole and the pad pin has a freedom of movement in the pin radial direction. When braking is performed in this state, the pad moves by elastically deforming the elastic member disposed between the pin holes, and the entire area of the torque transmitting portion comes into contact with the torque receiving portion without being restricted by the pad pin. Therefore, the posture of the pad is stabilized and the noise during braking is reduced.

また、パッドピンとピン孔との間に弾性部材を介在したことにより、車両走行時に発生するパッドピンやパッドのがたつき音（ラトル音）も効果的に防止される。 In addition, since the elastic member is interposed between the pad pin and the pin hole, the pad pin and rattling sound (rattle sound) generated when the vehicle travels can be effectively prevented.

なお、弾性部材をパッドピンに固定するものは、弾性部材をパッドピンの外周に予め装着しておき、ピン孔に対するパッドピン挿入時にその弾性部材をピン孔に圧入するなどして嵌めればよく、装着部の構造と組み立てが簡素化されてコスト面で有利になる。 In order to fix the elastic member to the pad pin, the elastic member may be mounted on the outer periphery of the pad pin in advance, and the elastic member may be fitted into the pin hole when the pad pin is inserted into the pin hole. This simplifies the structure and assembly, and is advantageous in terms of cost.

また、パッドピンはパッドに動きの自由度を確実に与えるためにピン孔の中心に置かれるようにするのがよく、弾性部材の力でパッドピンをセンタリングするものはその要求が満たされる。 Further, the pad pin is preferably placed at the center of the pin hole in order to reliably give the pad a degree of freedom of movement, and those that center the pad pin by the force of the elastic member satisfy the requirement.

このほか、キャリパのピン孔の内面とパッドピンの外周に環状溝を対応して設け、その対応した環状溝の双方に弾性部材を係止させるものは、弾性部材によるパッドピンの抜け止め効果も得られ、専用の抜止め手段が必須でなくなる。 In addition, if an annular groove is provided corresponding to the inner surface of the caliper pin hole and the outer periphery of the pad pin, and an elastic member is engaged with both of the corresponding annular grooves, the pad pin can be prevented from coming off by the elastic member. , Dedicated retaining means are no longer required.

以下、図１乃至図６に基づいてこの発明の実施の形態を説明する。図１、図２は、ピストン対向型ディスクブレーキにこの発明を適用した例を示している。このピストン対向型ディスクブレーキは、キャリパ１の窓穴部に２本のパッドピン３を横架して設け、そのパッドピン３をパッド裏板４ａに設けたピン孔６に遊嵌してパッド４をディスク軸方向スライド自在に支持し、ディスクＤを間にして対向配置したパッド４、４をそれぞれ液圧作動のピストン２で押圧してディスクＤに摺接させるようにしている。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 show an example in which the present invention is applied to a piston-facing disc brake. This piston-facing type disc brake is provided with two pad pins 3 horizontally installed in the window hole portion of the caliper 1, and the pad pins 3 are loosely fitted into pin holes 6 provided on the pad back plate 4a. Pads 4, 4 that are supported so as to be slidable in the axial direction and are opposed to each other with the disk D in between are pressed by a hydraulically operated piston 2 to be brought into sliding contact with the disk D.

パッドピン３は、図２、図３に示すように、キャリパ１のインナー部１ｉとアウター部１ｏに位置の対応したピン孔５、５設けてそのピン孔５、５に通し、適当な方法で抜止めして２点で支持している。 As shown in FIGS. 2 and 3, the pad pin 3 is provided with pin holes 5 and 5 corresponding to positions in the inner part 1i and the outer part 1o of the caliper 1, and is passed through the pin holes 5 and 5 and removed by an appropriate method. Stop and support at 2 points.

図３では、キャリパ１に形成されるピン孔５、５の内面に環状溝９を設けてその環状溝９にＯリングなどの弾性部材１０を嵌め、ピン孔５、５よりも内径の小さいこの弾性部材１０の内側にパッドピン３を通し、そのパッドピン３をピン孔５の孔面から浮いた状態にして弾性部材１０で受け支える構造にしており、パッドピン３が弾性部材１０を弾性変形させてピン径方向に動くことができる。これによりパッドピン３で支持したパッド４にピン径方向の動きの自由度が与えられ、パッド４に設けられるトルク伝達部８（図１参照）の全域がトルク受け部７に密着するようになる。 In FIG. 3, an annular groove 9 is provided on the inner surface of the pin holes 5, 5 formed in the caliper 1, and an elastic member 10 such as an O-ring is fitted into the annular groove 9, and this inner diameter is smaller than the pin holes 5, 5. The pad pin 3 is passed inside the elastic member 10, and the pad pin 3 is lifted from the hole surface of the pin hole 5 so as to be supported by the elastic member 10, and the pad pin 3 elastically deforms the elastic member 10 to pin it. Can move in the radial direction. As a result, the degree of freedom of movement in the pin radial direction is given to the pad 4 supported by the pad pin 3, and the entire area of the torque transmitting portion 8 (see FIG. 1) provided on the pad 4 comes into close contact with the torque receiving portion 7.

弾性部材１０は、キャリパ１側、パッドピン３側のどちらに固定してもよい。図４は、パッドピン３の外周に環状溝１１を設けてその環状溝１１に弾性部材１０を予め嵌めておき、キャリパ１に設けたピン孔５、５にパッドピン３を挿入するときに弾性部材１０を各ピン孔５、５に嵌め込む構造にしている。このように、弾性部材１０をパッドピン３に固定するとキャリパ１に設けるピン孔５が複雑にならず、弾性部材の組付けも容易になるのでコスト的にはこの方が有利である。 The elastic member 10 may be fixed to either the caliper 1 side or the pad pin 3 side. In FIG. 4, when the annular groove 11 is provided on the outer periphery of the pad pin 3 and the elastic member 10 is fitted in the annular groove 11 in advance, and the pad pin 3 is inserted into the pin holes 5 and 5 provided in the caliper 1, the elastic member 10. Is inserted into each pin hole 5 and 5. Thus, if the elastic member 10 is fixed to the pad pin 3, the pin hole 5 provided in the caliper 1 is not complicated, and the assembly of the elastic member is facilitated, which is advantageous in terms of cost.

弾性部材１０は、図５に示すように、パッド４の裏板４ａに設けたピン孔６との間に配置することもできる。この場合、パッドピン３側に弾性部材１０を設けるとパッドのスライド範囲の全域に弾性部材１０を配置する必要があるので、弾性部材１０はパッド４側に固定するのが望ましい。また、このときには、パッドピン３に対して締代ろを持たない弾性部材１０を使用して、パッド４のスライド抵抗が高まらないようにしておくのがよい。弾性部材１０は、ピン孔５とパッドピン３との間、及びピン孔６とパッドピン３との間の双方に設けてもよく、このときにピン孔６とパッドピン３との間に配置する弾性部材についても同じことが言える。 As shown in FIG. 5, the elastic member 10 can be disposed between the pin hole 6 provided in the back plate 4 a of the pad 4. In this case, if the elastic member 10 is provided on the pad pin 3 side, it is necessary to dispose the elastic member 10 over the entire sliding range of the pad. Therefore, the elastic member 10 is preferably fixed to the pad 4 side. At this time, it is preferable to use an elastic member 10 that does not have a margin for the pad pin 3 so that the sliding resistance of the pad 4 does not increase. The elastic member 10 may be provided both between the pin hole 5 and the pad pin 3 and between the pin hole 6 and the pad pin 3. At this time, the elastic member 10 is disposed between the pin hole 6 and the pad pin 3. The same can be said about.

なお、キャリパ側のピン孔５とパッドピン３との間に弾性部材１０を配置する場合には、図６に示すようにピン孔５の内面とパッドピン３の外周に環状溝９、１１を対応して設け、これらの溝に弾性部材１０を共に係止させてもよく、この構造によれば、パッドピン３の抜け止めを弾性部材１０によって行うことができる。 When the elastic member 10 is arranged between the pin hole 5 on the caliper side and the pad pin 3, the annular grooves 9 and 11 correspond to the inner surface of the pin hole 5 and the outer periphery of the pad pin 3 as shown in FIG. The elastic member 10 may be locked together in these grooves, and according to this structure, the pad pin 3 can be prevented from coming off by the elastic member 10.

弾性部材１０は、ゴムや弾力性のある軟質樹脂などで形成されたリングやスリーブ、金属や樹脂で形成されたバネなど、適当なものを自由に選択して使用することができる。バネは小さく波付けした線材や条材をリング状に加工したものなどが好ましい。 As the elastic member 10, an appropriate member such as a ring or sleeve formed of rubber or elastic soft resin or a spring formed of metal or resin can be freely selected and used. The spring is preferably a small corrugated wire or strip processed into a ring shape.

この発明のディスクブレーキの一例を示す平面図Plan view showing an example of a disc brake of the present invention 図１のＸ−Ｘ線に沿った断面図Sectional view along line XX in FIG. 図１のＹ−Ｙ部の一部を示す断面図Sectional drawing which shows a part of YY part of FIG. 図１のＹ−Ｙ部の他の形態を示す断面図Sectional drawing which shows the other form of the YY part of FIG. 図１のＹ−Ｙ部のさらに他の形態を示す断面図Sectional drawing which shows the further another form of the YY part of FIG. ピン孔とパッドピンの双方に弾性部材を係止させた例を示す図The figure which shows the example which locked the elastic member to both the pin hole and the pad pin ピストン対向型ディスクブレーキの一例を示す断面図Sectional view showing an example of a piston-facing disc brake 図７のＺ−Ｚ線に沿った断面図Sectional drawing along the ZZ line of FIG. トルク伝達部の接触不良状態に関する説明図Explanatory drawing about the poor contact state of the torque transmission part

符号の説明Explanation of symbols

１キャリパ
２ピストン
３パッドピン
４パッド
４ａパッド裏板
４ｂライニング
５キャリパ側のピン孔６パッド側のピン孔
７トルク受け部
８トルク伝達部
９、１１環状溝
１０弾性部材 DESCRIPTION OF SYMBOLS 1 Caliper 2 Piston 3 Pad pin 4 Pad 4a Pad back plate 4b Lining 5 Caliper side pin hole 6 Pad side pin hole 7 Torque receiving part 8 Torque transmission part 9, 11 Annular groove 10 Elastic member

Claims

キャリパの窓穴部に複数本のパッドピンを横架して設け、各パッドピンをパッド裏板に設けたピン孔に遊嵌してパッドをディスク軸方向スライド可能に支持するディスクブレーキにおいて、キャリパに設けたピン孔とパッドピンとの間又はパッド裏板に設けたピン孔とパッドピンとの間もしくはその両方に弾性部材を配置し、その弾性部材でパッドピンを支えてパッドピンをピン孔の孔面から浮き上がらせたことを特徴とするディスクブレーキ。 A plurality of pad pins are installed horizontally in the caliper window hole, and each pad pin is loosely fitted in a pin hole provided in the pad back plate, and the pad is provided in the caliper to support the pad slidably in the disk axial direction. An elastic member is arranged between the pin hole and the pad pin, or between the pin hole and the pad pin provided on the pad back plate, or both, and the pad pin is lifted from the hole surface of the pin hole by supporting the pad pin with the elastic member. Disc brake characterized by that.

前記弾性部材をパッドピンに固定した請求項１に記載のディスクブレーキ。 The disc brake according to claim 1, wherein the elastic member is fixed to a pad pin.

前記弾性部材の力でパッドピンがピン孔の中心にセンタリングされるようにした請求項１又は２に記載のディスクブレーキ。 3. The disc brake according to claim 1, wherein the pad pin is centered at the center of the pin hole by the force of the elastic member.

キャリパに設けられたピン孔の内面とパッドピンの外周に環状溝を対応して設け、キャリパに設けられたピン孔とパッドピンとの間に配置する弾性部材を前記対応した環状溝の双方に係止させた請求項１乃至３のいずれかに記載のディスクブレーキ。 An annular groove is provided corresponding to the inner surface of the pin hole provided in the caliper and the outer periphery of the pad pin, and an elastic member disposed between the pin hole provided in the caliper and the pad pin is locked to both of the corresponding annular grooves. The disc brake according to any one of claims 1 to 3.