JP2013203306A - Negative pressure type booster device - Google Patents

Negative pressure type booster device Download PDF

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JP2013203306A
JP2013203306A JP2012076099A JP2012076099A JP2013203306A JP 2013203306 A JP2013203306 A JP 2013203306A JP 2012076099 A JP2012076099 A JP 2012076099A JP 2012076099 A JP2012076099 A JP 2012076099A JP 2013203306 A JP2013203306 A JP 2013203306A
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negative pressure
valve
valve body
pressure chamber
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JP5935443B2 (en
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Yoji Inoue
陽治 井上
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Advics Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a negative pressure type booster device that effectively suppresses vibration and noise generated in the beginning of brake operation without spoiling operation responsiveness.SOLUTION: A negative pressure type booster device has a valve mechanism V incorporated in a shaft hole 22a of a valving element 22, the valve mechanism V including a negative pressure valve communicating and disconnecting a negative pressure chamber R1 and a variable pressure chamber R2 to and from each other and an atmosphere valve communicating and disconnecting the variable pressure chamber R2 and the atmosphere to and from each other as the valving element 22 of a plunger 32 moves forward and backward. The valve mechanism V includes a negative pressure valve seat 22d provided to the valving element 22, an atmosphere valve seat 32d provided to the plunger 32, and a cylindrical valving element 41 having, at a movable portion 41b, a negative pressure valve portion 41b1 constituting the negative pressure valve together with the negative valve seat and an atmosphere valve portion 41b2 constituting the atmosphere valve together with the atmosphere valve seat, and incorporated in the shaft hole. The valving element is provided with suppression means (damper D) of suppressing the movable portion from moving in a direction in which the negative pressure valve is opened.

Description

本発明は、自動車に適用されるブレーキ装置の一構成部品である負圧式倍力装置に関するものである。   The present invention relates to a negative pressure booster that is a component of a brake device applied to an automobile.

一般的に、負圧式倍力装置においては、ハウジング内を前方の負圧室と後方の変圧室とに区画する可動隔壁に連結されたバルブボデーが軸孔を備えていて、この軸孔内には、前記バルブボデーに対して軸方向に進退可能で入力部材と一体的に移動するプランジャと、このプランジャの前記バルブボデーに対する進退移動に応じて前記負圧室と前記変圧室間を連通・遮断する負圧弁および前記変圧室と大気間を連通・遮断する大気弁を備えた弁機構が組み込まれるとともに、前記プランジャの前端部と前記バルブボデーの前端部が後面に係合可能な反動部材と、この反動部材の前面に後端部にて係合し前記バルブボデーに対して軸方向に移動可能な出力部材が組付けられている。かかる負圧式倍力装置は、例えば、下記の特許文献1に記載されている。   Generally, in a negative pressure type booster, a valve body connected to a movable partition wall that divides a housing into a front negative pressure chamber and a rear variable pressure chamber has a shaft hole, and the shaft hole has a shaft hole. Is a plunger which can move forward and backward in the axial direction with respect to the valve body and moves integrally with the input member, and communicates and blocks the negative pressure chamber and the variable pressure chamber according to the forward and backward movement of the plunger with respect to the valve body. A reaction mechanism in which a valve mechanism including a negative pressure valve and an atmospheric valve for communicating and blocking between the variable pressure chamber and the atmosphere is incorporated, and a front end portion of the plunger and a front end portion of the valve body are engageable with a rear surface; An output member that is engaged with the front surface of the reaction member at the rear end and is movable in the axial direction with respect to the valve body is assembled. Such a negative pressure booster is described, for example, in Patent Document 1 below.

特開2003−127851号公報JP 2003-127851 A

上記した特許文献1に記載されている負圧式倍力装置においては、前記弁機構が、前記バルブボデーに一体的に設けた負圧弁座と、前記プランジャに一体的に設けた大気弁座と、前記負圧弁座とにより前記負圧弁を構成する負圧弁部と前記大気弁座とにより前記大気弁を構成する大気弁部とを可動部に有して前記軸孔内に組付けられる筒状の弁体を備えている。   In the negative pressure booster described in Patent Document 1 described above, the valve mechanism includes a negative pressure valve seat provided integrally with the valve body, an atmospheric valve seat provided integrally with the plunger, The negative pressure valve seat that constitutes the negative pressure valve with the negative pressure valve seat and the atmospheric valve portion that constitutes the atmospheric valve with the atmospheric valve seat in the movable portion and is assembled into the shaft hole A valve body is provided.

ところで、特許文献1に記載されている負圧式倍力装置においては、前記大気弁座として、第1大気弁座と第2大気弁座が採用されるとともに、前記大気弁部として、第1大気弁部と第2大気弁部が採用されていて、前記大気弁として、第1大気弁と、この第1大気弁より大気側に設けられて前記第1大気弁と大気との連通を開閉する第2大気弁を備えるとともに、前記第2大気弁の第1大気弁側と大気とを連通させるオリフィス通路を備えたものが採用されている。   By the way, in the negative pressure type booster described in Patent Document 1, a first atmospheric valve seat and a second atmospheric valve seat are adopted as the atmospheric valve seat, and the first atmospheric valve portion is used as the first atmospheric valve seat. A valve portion and a second atmospheric valve portion are employed. As the atmospheric valve, a first atmospheric valve is provided on the atmosphere side from the first atmospheric valve, and opens and closes communication between the first atmospheric valve and the atmosphere. In addition to the second atmospheric valve, the second atmospheric valve is provided with an orifice passage for communicating the first atmospheric valve side of the second atmospheric valve with the atmosphere.

このため、特許文献1に記載されている負圧式倍力装置では、ブレーキ作動初期において大気弁を通して変圧室に大気が多量に導入されなくて、弁機構での大気弁と負圧弁の挙動を安定化させることができ、ブレーキ作動初期に生じる振動や異音を抑制することが可能である。なお、ブレーキ作動初期に生じる振動や異音は、特許文献1に記載されているように、弁機構での大気弁と負圧弁の不安定挙動に起因するものであり、ブレーキ作動初期において出力部材に作用するマスタシリンダからの反力が小さい場合において生じやすいものである。   For this reason, in the negative pressure type booster described in Patent Document 1, a large amount of air is not introduced into the variable pressure chamber through the atmospheric valve in the early stage of braking operation, and the behavior of the atmospheric valve and the negative pressure valve in the valve mechanism is stabilized. It is possible to suppress vibrations and abnormal noises that occur in the early stage of brake operation. Note that the vibration and abnormal noise generated at the initial stage of brake operation are caused by unstable behavior of the atmospheric valve and the negative pressure valve in the valve mechanism, as described in Patent Document 1, and the output member at the initial stage of brake operation. This is likely to occur when the reaction force from the master cylinder acting on is small.

しかし、上記した特許文献1に記載されている負圧式倍力装置では、弁機構の大気弁においてオリフィス通路が採用されていて、上記した振動や異音を効果的に(十分に)抑制するためには、オリフィス通路(大気弁を通して変圧室に導入される大気を絞って小量とするもの)をかなり小さくする必要がある。この結果、変圧室への大気の導入に遅れが生じて、当該負圧式倍力装置の作動応答性が悪くなるおそれがある。   However, in the negative pressure type booster described in Patent Document 1 described above, an orifice passage is employed in the atmospheric valve of the valve mechanism in order to effectively (sufficiently) suppress the above vibration and noise. Therefore, it is necessary to considerably reduce the orifice passage (those that reduce the amount of air introduced into the variable pressure chamber through the atmosphere valve). As a result, there is a delay in the introduction of the atmosphere into the variable pressure chamber, and the operation response of the negative pressure booster may be deteriorated.

本発明は、上記した課題を解消すべくなされたもの(すなわち、当該負圧式倍力装置の作動応答性を阻害することなく、ブレーキ作動初期に生じる振動や異音を効果的に抑制するもの)であり、
ハウジング内を前方の負圧室と後方の変圧室とに区画する可動隔壁に連結されたバルブボデーが軸孔を備えていて、この軸孔内には、前記バルブボデーに対して軸方向に進退可能(往復動可能)で入力部材と一体的に移動するプランジャと、このプランジャの前記バルブボデーに対する進退移動に応じて前記負圧室と前記変圧室間を連通・遮断する負圧弁および前記変圧室と大気間を連通・遮断する大気弁を備えた弁機構が組み込まれるとともに、前記プランジャの前端部と前記バルブボデーの前端部が後面に係合可能な反動部材と、この反動部材の前面に後端部にて係合し前記バルブボデーに対して軸方向に移動可能な出力部材が組付けられている負圧式倍力装置であって、
前記弁機構が、前記バルブボデーに設けた負圧弁座と、前記プランジャに設けた大気弁座と、前記負圧弁座とにより前記負圧弁を構成する負圧弁部と前記大気弁座とにより前記大気弁を構成する大気弁部とを可動部に有して前記軸孔内に組付けられる筒状の弁体を備えており、
前記弁体には、前記負圧弁を開く方向への前記可動部の動き(復動方向への動き)を抑制する抑制手段が設けられていることに特徴がある。
The present invention has been made to solve the above-described problems (that is, effectively suppresses vibration and abnormal noise generated at the initial stage of brake operation without inhibiting the operation response of the negative pressure booster). And
A valve body connected to a movable partition that divides the inside of the housing into a front negative pressure chamber and a rear variable pressure chamber has a shaft hole, and the shaft body advances and retreats in the axial direction with respect to the valve body. A plunger that can move (reciprocally move) integrally with the input member, a negative pressure valve that communicates and blocks between the negative pressure chamber and the variable pressure chamber in accordance with a forward and backward movement of the plunger with respect to the valve body, and the variable pressure chamber And a reaction mechanism in which a front end portion of the plunger and a front end portion of the valve body can be engaged with the rear surface, and a rear surface on the front surface of the reaction member. A negative pressure booster in which an output member that is engaged at an end and is movable in the axial direction with respect to the valve body is assembled,
The valve mechanism includes the negative pressure valve seat provided on the valve body, the atmospheric valve seat provided on the plunger, and the negative pressure valve portion constituting the negative pressure valve by the negative pressure valve seat and the atmospheric valve seat. It has a cylindrical valve body that is assembled in the shaft hole having an atmospheric valve part that constitutes a valve in the movable part,
The valve body is characterized in that a suppression means for suppressing movement of the movable part in the direction of opening the negative pressure valve (movement in the backward movement direction) is provided.

ところで、本発明による負圧式倍力装置においては、弁機構における弁体に、負圧弁を開く方向への可動部の動き(復動方向への動き)を抑制する抑制手段が設けられている。このため、弁機構における弁体において、負圧弁を開く方向への可動部の動きを抑制することができて、弁機構での弁体(大気弁および負圧弁)の挙動を安定化させることができ、ブレーキ作動初期に生じる振動や異音を抑制することが可能である。   By the way, in the negative pressure type booster according to the present invention, the valve body in the valve mechanism is provided with suppression means for suppressing the movement of the movable part in the direction of opening the negative pressure valve (movement in the backward movement direction). For this reason, in the valve body in the valve mechanism, the movement of the movable part in the direction of opening the negative pressure valve can be suppressed, and the behavior of the valve body (atmospheric valve and negative pressure valve) in the valve mechanism can be stabilized. It is possible to suppress vibrations and abnormal noise that occur in the early stage of brake operation.

また、本発明による負圧式倍力装置においては、弁機構における弁体に設けた抑制手段が、負圧弁を開く方向への可動部の動き(復動方向への動き)を抑制するものであり、大気弁を通して変圧室に導入される大気を絞るものではないため、大気弁を通して変圧室へ導入される大気の流れに悪影響はなくて、当該負圧式倍力装置の作動応答性を良好に維持することが可能である。   Moreover, in the negative pressure type booster according to the present invention, the suppression means provided on the valve body in the valve mechanism suppresses the movement of the movable part in the direction to open the negative pressure valve (movement in the backward movement direction). Since the air introduced into the variable pressure chamber through the atmospheric valve is not restricted, the flow of the air introduced into the variable pressure chamber through the atmospheric valve is not adversely affected, and the operation response of the negative pressure booster is maintained well. Is possible.

上記した本発明の実施に際して、前記抑制手段は、前記弁体に設けたダンパーであることも可能である。この場合には、ゴム等を用いて摺動抵抗で弁体における可動部の動きを抑制する場合(低温時には、ゴムが硬くなって摺動抵抗が大きくなる)に比して、可動部の動きを抑制する性能が安定して得られる。また、前記ダンパーが、前記弁体の前記バルブボデーへの取付部と、前記弁体の前記可動部と、前記弁体の前記可動部に内周部にて気密的に組付けられて外周部にて前記軸孔の内壁に摺接する環状リップと、この環状リップの外周部に設けた切欠によって構成されていることも可能である。この場合には、弁機構の弁体を有効に活用して、ダンパーをシンプルで安価に構成することが可能である。   In carrying out the above-described present invention, the suppression means can be a damper provided in the valve body. In this case, the movement of the movable part is less than when the movement of the movable part in the valve body is suppressed with sliding resistance using rubber or the like (when the temperature is low, the rubber becomes harder and the sliding resistance increases). Stable performance is obtained. Further, the damper is hermetically assembled to the movable part of the valve body, the movable part of the valve body, and the outer peripheral part at the inner peripheral part of the valve body. It is also possible to comprise an annular lip slidably in contact with the inner wall of the shaft hole and a notch provided in the outer peripheral portion of the annular lip. In this case, the damper can be configured simply and inexpensively by effectively utilizing the valve body of the valve mechanism.

また、上記した本発明の実施に際して、前記ダンパーが、前記弁体の前記バルブボデーへの取付部と、前記弁体の前記可動部と、前記弁体の前記可動部に内周部にて気密的に組付けられるとともに外周部にて前記軸孔の内壁に気密的に組付けられ中間部(内周部と外周部の間)が前記弁体における前記可動部の動きに追従して変形可能な環状膜と、この環状膜に設けた通気孔によって構成されていることも可能である。この場合にも、弁機構の弁体を有効に活用して、ダンパーをシンプルで安価に構成することが可能である。また、この場合には、環状膜が軸孔の内壁との間にて摺動抵抗を生じさせないため、上記したダンパー(前記弁体の前記バルブボデーへの取付部と、前記弁体の前記可動部と、前記弁体の前記可動部に内周部にて気密的に組付けられて外周部にて前記軸孔の内壁に摺接する環状リップと、この環状リップの外周部に設けた切欠によって構成されている)に比して、特に低温時での弁体における可動部の作動応答性を阻害することが少ない。   Further, when the above-described present invention is carried out, the damper is airtight at the inner peripheral portion of the attachment portion of the valve body to the valve body, the movable portion of the valve body, and the movable portion of the valve body. Is assembled to the inner wall of the shaft hole at the outer peripheral portion, and the intermediate portion (between the inner peripheral portion and the outer peripheral portion) can be deformed following the movement of the movable portion in the valve body. It is also possible to be constituted by an annular film and a vent hole provided in the annular film. Also in this case, the damper can be configured simply and inexpensively by effectively utilizing the valve body of the valve mechanism. In this case, since the annular film does not generate sliding resistance with the inner wall of the shaft hole, the damper (the attachment portion of the valve body to the valve body and the movable body of the valve body are An annular lip that is hermetically assembled to the movable portion of the valve body at the inner peripheral portion thereof and slidably contacts the inner wall of the shaft hole at the outer peripheral portion, and a notch provided on the outer peripheral portion of the annular lip. In contrast, the operation responsiveness of the movable part in the valve body at a low temperature is less likely to be disturbed.

本発明による負圧式倍力装置の一実施形態の要部を示した縦断側面図である。It is the vertical side view which showed the principal part of one Embodiment of the negative pressure type booster by this invention. 図1に示した弁体を概略的に示した斜視図である。FIG. 2 is a perspective view schematically showing the valve body shown in FIG. 1. 本発明による負圧式倍力装置の他の実施形態の要部を示した縦断側面図である。It is the vertical side view which showed the principal part of other embodiment of the negative pressure type booster by this invention.

以下に、本発明の実施形態を図面に基づいて説明する。図1は本発明による負圧式倍力装置の一実施形態を示していて、この実施形態の負圧式倍力装置においては、ハウジング10に可動隔壁21とバルブボデー22を備えるパワーピストン20が前後方向(図1の左右方向)に移動可能に組付けられていて、ハウジング10内が可動隔壁21により前方の負圧室R1と後方の変圧室R2とに区画されている。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a negative pressure type booster according to the present invention. In the negative pressure type booster of this embodiment, a power piston 20 having a movable partition wall 21 and a valve body 22 in a housing 10 is provided in the front-rear direction. The housing 10 is assembled so as to be movable in the left-right direction in FIG. 1, and the inside of the housing 10 is partitioned by a movable partition wall 21 into a front negative pressure chamber R1 and a rear variable pressure chamber R2.

ハウジング10は、図示省略の前方シェルと後方シェル12を備えるとともに、前方シェルに気密的に設けられて負圧室R1を負圧源(例えば、図示省略のエンジンの吸気マニホールド)に常時連通させるための負圧導入管(図示省略)を備えている。このハウジング10は、後方シェル12を気密的に貫通する複数本の取付ボルト(図示省略)にて静止部材、すなわち車体(図示省略)に固定され、前方シェルを気密的に貫通する複数本の取付ボルト(図示省略)にてブレーキマスタシリンダ(図示省略)を支持するように構成されている。   The housing 10 includes a front shell and a rear shell 12 (not shown) and is hermetically provided in the front shell so that the negative pressure chamber R1 is always in communication with a negative pressure source (for example, an intake manifold of an engine (not shown)). Negative pressure introducing pipe (not shown). The housing 10 is fixed to a stationary member, that is, a vehicle body (not shown) by a plurality of mounting bolts (not shown) that airtightly penetrate the rear shell 12, and a plurality of attachments that airtightly penetrate the front shell. A brake master cylinder (not shown) is supported by bolts (not shown).

ブレーキマスタシリンダは、公知のものであり、そのシリンダ本体(図示省略)の後端部にて前方シェルに気密的に組付けられている。また、ブレーキマスタシリンダのピストン(図示省略)は、シリンダ本体から後方に突出して負圧室R1内に突入しており、後述する出力軸35の先端部(図示省略)によって前方に押動されるように構成されている。   The brake master cylinder is a well-known cylinder and is airtightly assembled to the front shell at the rear end of the cylinder body (not shown). A piston (not shown) of the brake master cylinder protrudes rearward from the cylinder body and enters the negative pressure chamber R1, and is pushed forward by a distal end portion (not shown) of the output shaft 35 described later. It is configured as follows.

パワーピストン20の可動隔壁21は、環状のプレート21aと、環状のダイアフラム21bとからなり、ハウジング10内にて前後方向(パワーピストン20の軸方向)へ移動可能に設置されている。ダイアフラム21bは、その外周縁に形成された環状の外周ビード部(図示省略)にて、ハウジング10に気密的に挟持されている。また、ダイアフラム21bは、その内周縁に形成された環状の内周ビード部にて、プレート21aの内周部とともにバルブボデー22に外周部に気密的に固定されている。   The movable partition wall 21 of the power piston 20 includes an annular plate 21a and an annular diaphragm 21b, and is installed in the housing 10 so as to be movable in the front-rear direction (the axial direction of the power piston 20). The diaphragm 21b is airtightly sandwiched between the housing 10 by an annular outer peripheral bead portion (not shown) formed on the outer peripheral edge thereof. The diaphragm 21b is airtightly fixed to the outer peripheral portion of the valve body 22 together with the inner peripheral portion of the plate 21a at an annular inner peripheral bead portion formed on the inner peripheral edge thereof.

パワーピストン20のバルブボデー22は、可動隔壁21の内周部に連結された樹脂製の中空体であって、円筒状に形成された中間部位にてハウジング10の後方シェル12に気密的かつ前後方向(パワーピストン20の軸方向)へ移動可能に組付けられており、ハウジング10の前方シェルとの間に介装されたリターンスプリング(図示省略)によって後方に向けて付勢されている。なお、バルブボデー22のハウジング10外に突出する部位は、後端に複数の通気孔19aを有するブーツ19によって被覆保護されている。   The valve body 22 of the power piston 20 is a resin hollow body connected to the inner peripheral portion of the movable partition wall 21, and is airtight and front-rear to the rear shell 12 of the housing 10 at an intermediate portion formed in a cylindrical shape. It is assembled so as to be movable in the direction (the axial direction of the power piston 20), and is urged rearward by a return spring (not shown) interposed between the housing 10 and the front shell. The portion of the valve body 22 that protrudes outside the housing 10 is covered and protected by a boot 19 having a plurality of vent holes 19a at the rear end.

また、バルブボデー22には、前後方向にて貫通する段付の軸孔22aが形成されるとともに、この軸孔22aの中間段部に後端にて連通するとともに前端にて負圧室R1に連通する一対の(図1では一方のみが示されている)負圧連通路22bと、軸孔22aの前方部分に略直交していてキー部材39を外周から挿通可能なキー取付孔22cが形成されている。   Further, the valve body 22 is formed with a stepped shaft hole 22a penetrating in the front-rear direction, and communicates at the rear end with an intermediate step portion of the shaft hole 22a and at the front end to the negative pressure chamber R1. A pair of communicating negative pressure communication passages 22b (only one of which is shown in FIG. 1) and a key attachment hole 22c that is substantially orthogonal to the front portion of the shaft hole 22a and allows the key member 39 to be inserted from the outer periphery are formed. ing.

上記した軸孔22aには、入力軸31とプランジャ32が同軸的に組付けられるとともに、弁機構Vとフィルタ51,52が同軸的に組付けられている。また、上記した軸孔22aには、プランジャ32の前方に、連結部材33、反動部材34および出力軸(出力部材)35が同軸的に組付けられている。   The input shaft 31 and the plunger 32 are coaxially assembled in the shaft hole 22a, and the valve mechanism V and the filters 51 and 52 are coaxially assembled. A connecting member 33, a reaction member 34, and an output shaft (output member) 35 are coaxially assembled in the shaft hole 22 a described above in front of the plunger 32.

入力軸31は、バルブボデー22に対して進退可能であり、球状先端部31aにてプランジャ32の受承連結部32cに関節状に連結され、後端ねじ部(図示省略)にてヨークを介してブレーキペダル(共に図示省略)に連結されていて、ブレーキペダルに作用する踏力を入力として前方に向けて受けるように構成されている。また、入力軸31は、その中間段部に係止されたリテーナ36を介してリターンスプリング37に係合していて、リターンスプリング37によって後方に向けて付勢されている。   The input shaft 31 can be moved back and forth with respect to the valve body 22, and is connected to the receiving connection portion 32c of the plunger 32 in a joint shape by a spherical tip portion 31a, and via a yoke at a rear end screw portion (not shown). Are coupled to a brake pedal (both not shown), and are configured to receive a pedal force acting on the brake pedal as an input toward the front. The input shaft 31 is engaged with a return spring 37 via a retainer 36 locked to the intermediate step portion, and is urged rearward by the return spring 37.

プランジャ32は、その先端部32aにて連結部材33を介して反動部材34における後面の中央部位に当接可能であるとともに、その中間部に形成した環状溝部32bにてキー部材39に係合可能であって、先端部32aが反動部材34から連結部材33を介して出力の反力を部分的に受ける部分である。また、プランジャ32の後端には、弁機構Vにおける環状の大気弁座32dが形成されている。   The plunger 32 can be brought into contact with the central portion of the rear surface of the reaction member 34 through the connecting member 33 at the tip end portion 32a, and can be engaged with the key member 39 at the annular groove portion 32b formed in the intermediate portion thereof. The tip portion 32 a is a portion that partially receives the reaction force of the output from the reaction member 34 via the connecting member 33. An annular atmospheric valve seat 32d in the valve mechanism V is formed at the rear end of the plunger 32.

反動部材34は、その後面の中央部位が後方に膨出変形可能であり、出力軸35の後方円筒部35b内に収容されて前面全体にて出力軸35の後端部後面に係合(当接)した状態にて、出力軸35の後方円筒部35bとともにバルブボデー22の前端部に組付けられている。この反動部材34は、その後面にて、プランジャ32の先端部32a前面に連結部材33を介して当接可能であるとともに、バルブボデー22の円環状前端面に当接している。   The reaction member 34 can be deformed rearward at the central portion of the rear surface thereof, and is accommodated in the rear cylindrical portion 35b of the output shaft 35 so that the entire front surface is engaged with the rear surface of the rear end portion of the output shaft 35 (the contact member 34). In this state, it is assembled to the front end portion of the valve body 22 together with the rear cylindrical portion 35b of the output shaft 35. The reaction member 34 can contact the front surface of the distal end portion 32a of the plunger 32 via the connecting member 33 at the rear surface, and also contact the annular front end surface of the valve body 22.

出力軸35は、反動部材34とともにバルブボデー22の軸孔22aの前端部内に前後方向へ移動可能に組付けられていて、先端部(図示省略)にてブレーキマスタシリンダにおけるピストンの係合部(凹部)に押動可能に当接しており、制動作動時にはブレーキマスタシリンダのピストンから受ける反力を反動部材34に伝達するようになっている。   The output shaft 35 is assembled in the front end portion of the shaft hole 22a of the valve body 22 together with the reaction member 34 so as to be movable in the front-rear direction, and the piston engaging portion ( The reaction force received from the piston of the brake master cylinder is transmitted to the reaction member 34 during braking operation.

キー部材39は、パワーピストン20のバルブボデー22に対するプランジャ32の前後方向移動を規定する機能と、ハウジング10に対するパワーピストン20の後方への移動限界位置(バルブボデー22の後方復帰位置)を規定する機能を有していて、バルブボデー22とプランジャ32のそれぞれに対してパワーピストン20の軸方向に所要量相対移動可能に組付けられている。   The key member 39 defines the function of defining the movement of the plunger 32 in the front-rear direction with respect to the valve body 22 of the power piston 20 and the limit position of the rearward movement of the power piston 20 with respect to the housing 10 (rear return position of the valve body 22). It has a function and is assembled to the valve body 22 and the plunger 32 so as to be movable relative to each other in the axial direction of the power piston 20.

弁機構Vは、バルブボデー22における負圧連通路22bの後端部に一体的に形成した円弧形状又は円形状の負圧弁座22dと、プランジャ32の後端部に一体的に形成した環状の大気弁座32dと、この大気弁座32dに対して同軸的に配置されてバルブボデー22の軸孔22a内に組付けた筒状の弁体41を備えている。弁体41は、環状の取付部41aと、この取付部41aに一体的に形成されて軸方向に移動可能な筒状の可動部41bを有している。   The valve mechanism V includes an arcuate or circular negative pressure valve seat 22d integrally formed at the rear end portion of the negative pressure communication passage 22b in the valve body 22, and an annular atmosphere integrally formed at the rear end portion of the plunger 32. 32 d of valve seats and the cylindrical valve body 41 which are arrange | positioned coaxially with respect to this atmospheric valve seat 32d, and were assembled | attached in the shaft hole 22a of the valve body 22 are provided. The valve body 41 has an annular mounting portion 41a and a cylindrical movable portion 41b that is integrally formed with the mounting portion 41a and is movable in the axial direction.

取付部41aは、バルブボデー22の軸孔22a内に気密的に組付けられていて、リテーナ42によってバルブボデー22における軸孔22aの定位置(段部)に固定保持されている。なお、リテーナ42は、リターンスプリング37によって前方に向けて付勢されていて、バルブボデー22における軸孔22aの段部に固定されている。   The mounting portion 41a is airtightly assembled in the shaft hole 22a of the valve body 22, and is fixedly held at a fixed position (step portion) of the shaft hole 22a in the valve body 22 by the retainer 42. The retainer 42 is urged forward by a return spring 37 and is fixed to a step portion of the shaft hole 22 a in the valve body 22.

可動部41bは、負圧弁座22dに対して着座・離座可能で負圧弁座22dとにより、負圧室R1と変圧室R2間を連通・遮断可能な負圧弁を構成する負圧弁部41b1を有するとともに、大気弁座32dに対して着座・離座可能で大気弁座32dとにより、変圧室R2と大気間を連通・遮断可能な大気弁を構成する環状の大気弁部41b2を有している。この可動部41bは、圧縮スプリング43によって前方に向けて付勢されている。   The movable part 41b can be seated / separated with respect to the negative pressure valve seat 22d, and the negative pressure valve seat 41d constitutes a negative pressure valve part 41b1 constituting a negative pressure valve capable of communicating / blocking between the negative pressure chamber R1 and the variable pressure chamber R2. And an annular atmospheric valve portion 41b2 that constitutes an atmospheric valve that can be seated / separated with respect to the atmospheric valve seat 32d and that can communicate and block between the variable pressure chamber R2 and the atmosphere by the atmospheric valve seat 32d. Yes. The movable portion 41 b is urged forward by a compression spring 43.

上記した弁機構Vの構成によって、変圧室R2は、入力軸31およびプランジャ32のバルブボデー22に対する前後方向の移動に応じて、負圧室R1または大気に連通可能である。すなわち、入力軸31およびプランジャ32がバルブボデー22に対して図1の原位置(復帰位置)から前方へ移動して、負圧弁部41b1が負圧弁座22dに着座し、大気弁座32dが大気弁部41b2から離座したときには、変圧室R2が負圧室R1との連通を遮断されて大気に連通する。このときには、ブーツ19の通気孔19a、フィルタ51,52、弁体41の内部、大気弁座32dと大気弁部41b2間の隙間、バルブボデー22に設けた連通路等を通して、変圧室R2に大気が流入する。   With the configuration of the valve mechanism V described above, the variable pressure chamber R2 can communicate with the negative pressure chamber R1 or the atmosphere in accordance with the movement of the input shaft 31 and the plunger 32 in the front-rear direction with respect to the valve body 22. That is, the input shaft 31 and the plunger 32 move forward from the original position (return position) in FIG. 1 with respect to the valve body 22, the negative pressure valve portion 41b1 is seated on the negative pressure valve seat 22d, and the atmospheric valve seat 32d is atmospheric. When separated from the valve portion 41b2, the variable pressure chamber R2 is disconnected from the negative pressure chamber R1 and communicates with the atmosphere. At this time, the atmosphere in the variable pressure chamber R2 is passed through the vent hole 19a of the boot 19, the inside of the filters 51 and 52, the valve body 41, the gap between the atmospheric valve seat 32d and the atmospheric valve portion 41b2, the communication passage provided in the valve body 22, and the like. Flows in.

また、入力軸31およびプランジャ32がバルブボデー22に対して復帰位置(原位置)に戻って、大気弁座32dが大気弁部41b2に着座し、負圧弁部41b1が負圧弁座22dから離座している状態(すなわち、大気弁が閉じて、変圧室R2と大気との連通が遮断され、かつ、負圧弁が開いて、負圧室R1と変圧室R2とが連通している状態)では、変圧室R2が大気との連通を遮断されて負圧室R1に連通する。このときには、バルブボデー22に設けた連通路、負圧弁部41b1と負圧弁座22d間の隙間、負圧連通路22b等を通して、変圧室R2から負圧室R1に空気が吸引されて流れる。   Further, the input shaft 31 and the plunger 32 return to the return position (original position) with respect to the valve body 22, the atmospheric valve seat 32d is seated on the atmospheric valve portion 41b2, and the negative pressure valve portion 41b1 is separated from the negative pressure valve seat 22d. In a closed state (that is, the atmosphere valve is closed, the communication between the variable pressure chamber R2 and the atmosphere is shut off, and the negative pressure valve is opened, and the negative pressure chamber R1 and the variable pressure chamber R2 are in communication). The variable pressure chamber R2 is disconnected from the atmosphere and communicated with the negative pressure chamber R1. At this time, air is sucked from the variable pressure chamber R2 into the negative pressure chamber R1 through the communication passage provided in the valve body 22, the gap between the negative pressure valve portion 41b1 and the negative pressure valve seat 22d, the negative pressure communication passage 22b, and the like.

ところで、この実施形態においては、弁機構Vにおける弁体41に、負圧弁を開く方向(後方)への可動部41bの動き(復動方向への動き)を抑制する抑制手段としてのダンパーDが設けられている。ダンパーDは、弁体41のバルブボデー22への取付部41aと、弁体41の可動部41bと、弁体41の可動部41bに内周部にて気密的に組付けられて外周部にて軸孔22aの内壁に摺接する(極めて小さい摺動抵抗にて摺動可能に接する)環状リップ41cと、この環状リップ41cの外周部に設けた通気可能な切欠41c1(図2参照)によって構成されている。環状リップ41cは、その外周部が外周に向け後方に向けて湾曲するように形成されていて、可動部41bの後方移動時の摺動抵抗が可動部41bの前方移動時の摺動抵抗に比して大きくなるように設定されている。   By the way, in this embodiment, the damper D as a suppression means for suppressing the movement (movement in the backward movement direction) of the movable portion 41b in the valve element 41 in the valve mechanism V in the direction (rearward) of opening the negative pressure valve. Is provided. The damper D is airtightly assembled to the outer peripheral portion of the valve body 41 by attaching the valve body 41 to the valve body 22, the movable portion 41 b of the valve body 41, and the movable portion 41 b of the valve body 41. And an annular lip 41c slidably contacting the inner wall of the shaft hole 22a (slidably contacting with an extremely small sliding resistance), and a ventable notch 41c1 (see FIG. 2) provided on the outer peripheral portion of the annular lip 41c. Has been. The annular lip 41c is formed such that its outer peripheral portion curves backward toward the outer periphery, and the sliding resistance when the movable portion 41b is moved backward is compared with the sliding resistance when the movable portion 41b is moved forward. And is set to be large.

上記のように構成したこの実施形態の負圧式倍力装置においては、弁機構Vにおける弁体41に、負圧弁を開く方向(後方)への可動部41bの動き(復動方向への動き)を抑制する抑制手段としてのダンパーDが設けられている。このため、弁機構Vにおける弁体41において、負圧弁を開く方向への可動部41bの動きを抑制することができて、弁機構Vでの弁体41(大気弁および負圧弁を有する)の挙動を安定化させることができ、ブレーキ作動初期に生じる振動や異音を抑制することが可能である。   In the negative pressure type booster of this embodiment configured as described above, the movement of the movable portion 41b in the valve element 41 in the valve mechanism V in the direction (backward) of opening the negative pressure valve (movement in the backward movement direction). A damper D is provided as a suppression means for suppressing the above. For this reason, in the valve body 41 in the valve mechanism V, the movement of the movable part 41b in the direction of opening the negative pressure valve can be suppressed, and the valve body 41 (having an atmospheric valve and a negative pressure valve) in the valve mechanism V can be prevented. It is possible to stabilize the behavior, and to suppress vibrations and abnormal noises that occur in the early stage of brake operation.

また、この実施形態の負圧式倍力装置においては、弁機構Vにおける弁体41に設けた抑制手段としてのダンパーDが、負圧弁を開く方向への可動部41bの動き(復動方向への動き)を抑制するものであり、大気弁(大気弁座32d、大気弁部41b2)を通して変圧室R2に導入される大気を絞るものではないため、大気弁を通して変圧室R2へ導入される大気の流れに悪影響はなくて、当該負圧式倍力装置の作動応答性を良好に維持することが可能である。   Further, in the negative pressure booster of this embodiment, the damper D as the suppression means provided in the valve body 41 in the valve mechanism V moves the movable portion 41b in the direction to open the negative pressure valve (in the backward movement direction). Motion) and does not restrict the atmosphere introduced into the variable pressure chamber R2 through the atmospheric valve (atmospheric valve seat 32d, atmospheric valve portion 41b2). There is no adverse effect on the flow, and the operation response of the negative pressure booster can be maintained well.

また、この実施形態では、ダンパーDが、弁体41のバルブボデー22への取付部41aと、弁体41の可動部41bと、弁体41の可動部41bに内周部にて気密的に組付けられて外周部にて軸孔22aの内壁に摺接する環状リップ41cと、この環状リップ41cの外周部に設けた切欠41c1によって構成されている。このため、弁機構Vの弁体41を有効に活用して、ダンパーDをシンプルで安価に構成することが可能である。   Further, in this embodiment, the damper D is airtightly attached to the valve body 22 on the valve body 22, the movable portion 41 b of the valve body 41, and the movable portion 41 b of the valve body 41 at the inner peripheral portion. The annular lip 41c that is assembled and slidably contacts the inner wall of the shaft hole 22a at the outer peripheral portion, and a notch 41c1 provided on the outer peripheral portion of the annular lip 41c. For this reason, it is possible to make the damper D simple and inexpensive by effectively utilizing the valve element 41 of the valve mechanism V.

また、この実施形態では、負圧弁を開く方向への可動部41bの動き(復動方向への動き)を抑制する抑制手段としてダンパーDが採用されている。このため、ゴム等を用いて摺動抵抗で弁体41における可動部41bの動きを抑制する場合(低温時には、ゴムが硬くなって摺動抵抗が大きくなる)に比して、可動部41bの動きを抑制する性能が安定して得られる。   Further, in this embodiment, the damper D is employed as a suppression means that suppresses the movement of the movable portion 41b in the direction to open the negative pressure valve (movement in the backward movement direction). For this reason, compared with the case where the movement of the movable part 41b in the valve body 41 is suppressed by sliding resistance using rubber or the like (when the temperature is low, the rubber becomes harder and the sliding resistance becomes larger). Stable movement performance can be obtained.

上記した実施形態においては、弁体41の可動部41bに、切欠41c1を有する環状リップ41cを設けてダンパーDを形成したが、このダンパーの構成は適宜変更が可能であり、例えば、弁体41の取付部41aに、空気室と、これに連通して空気を流通可能な通気孔を設けるとともに、この通気孔に弁体(可動部41bの後方移動時における空気流動抵抗が可動部41bの前方移動時における空気流動抗に比して大きくするもの)を設けて、エアダンパーを構成することも可能であるとともに、図3に示したように、ダンパーDを構成して実施することも可能である。   In the above-described embodiment, the damper D is formed by providing the movable portion 41b of the valve body 41 with the annular lip 41c having the notch 41c1. However, the configuration of this damper can be appropriately changed. The mounting portion 41a is provided with an air chamber and a vent hole that communicates with the air chamber and allows air to flow therethrough. The valve body (air flow resistance when the movable portion 41b is moved rearward is provided in the vent hole in front of the movable portion 41b. It is possible to configure an air damper by providing an air flow resistance that is larger than the air flow resistance during movement, and it is also possible to configure and implement a damper D as shown in FIG. is there.

図3に示したダンパーDは、弁体41のバルブボデー22への取付部41aと、弁体41の可動部41bと、弁体41の可動部41bに内周部にて気密的に組付けられるとともに外周部にて軸孔22aの内壁に気密的に組付けられ中間部(内周部と外周部の間)が弁体41における可動部41bの動きに追従して変形(湾曲または屈曲)可能な環状膜41dと、この環状膜41dに設けた通気孔41d1によって構成されている。なお、環状膜41dは、上記した環状リップ41cに比して薄肉(変形可能)とされている。   The damper D shown in FIG. 3 is airtightly assembled to the valve body 22 mounting portion 41a, the valve body 41 movable portion 41b, and the valve body 41 movable portion 41b at the inner peripheral portion. In addition, the intermediate portion (between the inner peripheral portion and the outer peripheral portion) is deformed following the movement of the movable portion 41b in the valve body 41 (curved or bent). It is configured by a possible annular film 41d and a vent hole 41d1 provided in the annular film 41d. The annular film 41d is thinner (deformable) than the annular lip 41c described above.

このため、図3に示したダンパーDでも、弁機構Vの弁体41を有効に活用して、ダンパーDをシンプルで安価に構成することが可能である。また、この場合には、環状膜41dが軸孔22aの内壁との間にて摺動抵抗を生じさせないため、上記したダンパーD(図1および図2に示したダンパー)に比して、特に低温時での弁体41における可動部41bの作動応答性を阻害することが少ない。   For this reason, even with the damper D shown in FIG. 3, the damper D can be configured simply and inexpensively by effectively utilizing the valve element 41 of the valve mechanism V. Further, in this case, since the annular film 41d does not generate sliding resistance with the inner wall of the shaft hole 22a, it is particularly in comparison with the above-described damper D (the damper shown in FIGS. 1 and 2). The operation responsiveness of the movable part 41b in the valve body 41 at a low temperature is hardly hindered.

また、上記した各実施形態においては、シングル式の負圧式倍力装置に本発明を実施したが、本発明は、例えば、タンデム式の負圧式倍力装置にも、上記した各実施形態と同様にまたは適宜変更して、実施することが可能であり、上記した実施形態に限定されるものではない。   In each of the above-described embodiments, the present invention is applied to a single negative pressure booster. However, the present invention is also applied to, for example, a tandem negative pressure booster as in the above-described embodiments. However, the present invention is not limited to the above-described embodiment.

10…ハウジング、20…パワーピストン、21…可動隔壁、22…バルブボデー、22a…軸孔、22b…負圧連通路、22c…キー取付孔、22d…負圧弁座、31…入力軸(入力部材)、32…プランジャ、32d…大気弁座、34…反動部材、35…出力軸(出力部材)、39…キー部材、41…弁体、41a…取付部、41b…可動部、41b1…負圧弁部、41b2…大気弁部、41c…環状リップ、41c1…切欠、41d…環状膜、41d1…通気孔、V…弁機構、R1…負圧室、R2…変圧室、D…ダンパー(抑制手段) DESCRIPTION OF SYMBOLS 10 ... Housing, 20 ... Power piston, 21 ... Movable partition, 22 ... Valve body, 22a ... Shaft hole, 22b ... Negative pressure communication path, 22c ... Key attachment hole, 22d ... Negative pressure valve seat, 31 ... Input shaft (input member) 32 ... plunger, 32d ... atmospheric valve seat, 34 ... reaction member, 35 ... output shaft (output member), 39 ... key member, 41 ... valve element, 41a ... mounting portion, 41b ... movable portion, 41b1 ... negative pressure valve portion 41b2 ... atmospheric valve portion, 41c ... annular lip, 41c1 ... notch, 41d ... annular membrane, 41d1 ... ventilation hole, V ... valve mechanism, R1 ... negative pressure chamber, R2 ... transformer chamber, D ... damper (suppression means)

Claims (4)

ハウジング内を前方の負圧室と後方の変圧室とに区画する可動隔壁に連結されたバルブボデーが軸孔を備えていて、この軸孔内には、前記バルブボデーに対して軸方向に進退可能で入力部材と一体的に移動するプランジャと、このプランジャの前記バルブボデーに対する進退移動に応じて前記負圧室と前記変圧室間を連通・遮断する負圧弁および前記変圧室と大気間を連通・遮断する大気弁を備えた弁機構が組み込まれるとともに、前記プランジャの前端部と前記バルブボデーの前端部が後面に係合可能な反動部材と、この反動部材の前面に後端部にて係合し前記バルブボデーに対して軸方向に移動可能な出力部材が組付けられている負圧式倍力装置であって、
前記弁機構が、前記バルブボデーに設けた負圧弁座と、前記プランジャに設けた大気弁座と、前記負圧弁座とにより前記負圧弁を構成する負圧弁部と前記大気弁座とにより前記大気弁を構成する大気弁部とを可動部に有して前記軸孔内に組付けられる筒状の弁体を備えており、
前記弁体には、前記負圧弁を開く方向への前記可動部の動きを抑制する抑制手段が設けられている負圧式倍力装置。
A valve body connected to a movable partition that divides the inside of the housing into a front negative pressure chamber and a rear variable pressure chamber has a shaft hole, and the shaft body advances and retreats in the axial direction with respect to the valve body. A plunger that can move integrally with the input member, a negative pressure valve that communicates and shuts off the negative pressure chamber and the variable pressure chamber and communicates between the variable pressure chamber and the atmosphere as the plunger moves forward and backward relative to the valve body. A reaction mechanism in which a valve mechanism having a shut-off atmospheric valve is incorporated, a front end portion of the plunger and a front end portion of the valve body can be engaged with a rear surface, and a front end of the reaction member at a rear end portion A negative pressure booster in which an output member movable in the axial direction with respect to the valve body is assembled;
The valve mechanism includes the negative pressure valve seat provided on the valve body, the atmospheric valve seat provided on the plunger, and the negative pressure valve portion constituting the negative pressure valve by the negative pressure valve seat and the atmospheric valve seat. It has a cylindrical valve body that is assembled in the shaft hole having an atmospheric valve part that constitutes a valve in the movable part,
The negative pressure type booster provided with the suppression means which suppresses the movement of the said movable part to the said valve body in the direction which opens the said negative pressure valve.
請求項1に記載の負圧式倍力装置において、
前記抑制手段は、前記弁体に設けたダンパーであることを特徴とする負圧式倍力装置。
In the negative pressure type booster according to claim 1,
The negative pressure type booster characterized in that the suppression means is a damper provided in the valve body.
請求項2に記載の負圧式倍力装置において、
前記ダンパーは、前記弁体の前記バルブボデーへの取付部と、前記弁体の前記可動部と、前記弁体の前記可動部に内周部にて気密的に組付けられて外周部にて前記軸孔の内壁に摺接する環状リップと、この環状リップの外周部に設けた切欠によって構成されていることを特徴とする負圧式倍力装置。
The negative pressure booster according to claim 2,
The damper is hermetically assembled to the movable part of the valve body and the movable part of the valve body at the inner peripheral part thereof at the outer peripheral part. A negative pressure booster comprising: an annular lip that is in sliding contact with the inner wall of the shaft hole; and a notch provided in an outer peripheral portion of the annular lip.
請求項2に記載の負圧式倍力装置において、
前記ダンパーは、前記弁体の前記バルブボデーへの取付部と、前記弁体の前記可動部と、前記弁体の前記可動部に内周部にて気密的に組付けられるとともに外周部にて前記軸孔の内壁に気密的に組付けられ中間部が前記弁体における前記可動部の動きに追従して変形可能な環状膜と、この環状膜に設けた通気孔によって構成されていることを特徴とする負圧式倍力装置。
The negative pressure booster according to claim 2,
The damper is hermetically assembled to the valve body mounting part to the valve body, the movable part of the valve body, and the movable part of the valve body at the inner peripheral part and at the outer peripheral part. An intermediate part that is airtightly assembled to the inner wall of the shaft hole is configured by an annular film that can be deformed following the movement of the movable part in the valve body, and a vent hole provided in the annular film. Characteristic negative pressure booster.
JP2012076099A 2012-03-29 2012-03-29 Negative pressure booster Expired - Fee Related JP5935443B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335864U (en) * 1989-08-09 1991-04-08
JPH11336776A (en) * 1998-05-26 1999-12-07 Koyo Seiko Co Ltd Rubber seal
JP2003127851A (en) * 2001-10-22 2003-05-08 Bosch Automotive Systems Corp Valve mechanism of booster
JP2006160002A (en) * 2004-12-03 2006-06-22 Advics:Kk Negative pressure type booster

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335864U (en) * 1989-08-09 1991-04-08
JPH11336776A (en) * 1998-05-26 1999-12-07 Koyo Seiko Co Ltd Rubber seal
JP2003127851A (en) * 2001-10-22 2003-05-08 Bosch Automotive Systems Corp Valve mechanism of booster
JP2006160002A (en) * 2004-12-03 2006-06-22 Advics:Kk Negative pressure type booster

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