JPS6340712B2 - - Google Patents
Info
- Publication number
- JPS6340712B2 JPS6340712B2 JP55172479A JP17247980A JPS6340712B2 JP S6340712 B2 JPS6340712 B2 JP S6340712B2 JP 55172479 A JP55172479 A JP 55172479A JP 17247980 A JP17247980 A JP 17247980A JP S6340712 B2 JPS6340712 B2 JP S6340712B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- booster
- bowl
- valve
- shaped body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000011324 bead Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
Description
【発明の詳細な説明】
本発明は、主として自動車の油圧ブレーキ、ク
ラツチ等を作動するために用いられる、負圧式倍
力装置およびマスタシリンダの組立体、特に内部
にブースタピストンと、このブースタピストンに
内周端を結着したピストンダイヤフラムとを収容
するブースタシエルを前部椀状体と後部椀状体と
に分割し、この両椀状体の対向端部間に前記ピス
トンダイヤフラムの外周端を挟入し、前記前部椀
状体前面にマスタシリンダのシリンダ本体を配設
し、このシリンダ本体に摺合する作動ピストンに
前記ブースタピストンを連接するようにした組立
体に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly of a negative pressure booster and a master cylinder, which are mainly used to operate hydraulic brakes, clutches, etc. of automobiles, and in particular, a booster piston inside the booster piston, and a booster piston attached to the booster piston. A booster shell that accommodates a piston diaphragm whose inner peripheral end is bound is divided into a front bowl-shaped body and a rear bowl-shaped body, and the outer peripheral end of the piston diaphragm is sandwiched between opposing ends of the two bowl-shaped bodies. The present invention relates to an assembly in which a cylinder body of a master cylinder is disposed on the front surface of the front bowl-shaped body, and the booster piston is connected to an operating piston that slides on the cylinder body.
上記組立体において、両椀状体及びシリンダ本
体の三者を、ブースタピストンを貫通するタイロ
ツドにより連結し、倍力装置の作動時にシリンダ
本体に作用する前方へのスラスト荷重をタイロツ
ドに受けさせてブースタシエルの荷重負担を軽減
するようにした形式のものは従来公知であるが、
本発明はかかる形式のものにおいて、装置の組立
作業を迅速的確に行うことができる構造簡単な、
倍力装置およびマスタシリンダの組立体を提供す
ることを目的とする。 In the above assembly, the two bowl-shaped bodies and the cylinder body are connected by a tie rod that passes through the booster piston, and the tie rod receives the forward thrust load that acts on the cylinder body when the booster is activated. Types that reduce the load on the shell are conventionally known, but
The present invention provides a device of this type that has a simple structure that allows quick and accurate assembly work of the device.
An object of the present invention is to provide an assembly of a booster and a master cylinder.
そして上記目的を達成するために本発明は、ブ
ースタピストンを貫通して互いに並列する少なく
とも二本のタイロツドの後端を後部椀状体に固着
すると共に、それらタイロツドの前部相互間を連
結板を介して連結し、この連結板を前部椀状体の
内面に当接させると共に、前記各タイロツドの前
端に該前部椀状体及びシリンダ本体を固着し、さ
らに前記両椀状体の対向端部間には、その間の軸
方向相対移動は許容するが周方向相対移動は規制
する位置決め手段を設けたことを特徴とする。 In order to achieve the above object, the present invention fixes the rear ends of at least two tie rods that pass through the booster piston and are parallel to each other to the rear bowl-shaped body, and also connects the front parts of the tie rods with a connecting plate. The connecting plate is brought into contact with the inner surface of the front bowl-shaped body, and the front bowl-shaped body and the cylinder body are fixed to the front ends of each of the tie rods, and the opposite ends of both of the bowl-shaped bodies are The present invention is characterized in that positioning means is provided between the parts to permit relative movement in the axial direction but restrict relative movement in the circumferential direction.
以下、図面により本発明の一実施例について説
明すると、第1図において負圧式倍力装置Sのブ
ースタシエル1は軽量な薄肉鋼板または合成樹脂
より成形された前後一対の椀状体1F,1Rより
なり、その後部椀状体1Rの開口部に円周上等間
隔に突設された複数の爪片1aを前部椀状体1R
の開口部に円周上等間隔に形成された複数の切欠
き1bに係合させて両椀状体1F,1R相互の位
置決めが行われる。而して爪片1a及び切欠き1
bは互いに協働して、両椀状体1F,1Rの対向
端部間の軸方向相対移動は許容するが周方向相対
移動は規制する、本発明の位置決め手段を構成す
る。そして両椀状体1F,1Rはそれらの前後対
向壁間を、互いに平行する複数本(図示例では二
本)のタイロツド30を介して連結される。この
ブースタシエル1とタイロツド30との連結構造
については後述する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a booster shell 1 of a negative pressure booster S is constructed from a pair of front and rear bowl-shaped bodies 1F and 1R molded from lightweight thin-walled steel plate or synthetic resin. A plurality of claw pieces 1a protruding from the opening of the rear bowl-shaped body 1R at equal intervals on the circumference are attached to the front bowl-shaped body 1R.
The two bowl-shaped bodies 1F and 1R are mutually positioned by engaging with a plurality of notches 1b formed at equal intervals on the circumference in the openings of the bowl-shaped bodies 1F and 1R. Therefore, the claw piece 1a and the notch 1
b cooperate with each other to constitute a positioning means of the present invention that allows relative movement in the axial direction between the opposing ends of both bowl-shaped bodies 1F and 1R, but restricts relative movement in the circumferential direction. Both bowl-shaped bodies 1F and 1R are connected between their front and rear opposing walls via a plurality of (two in the illustrated example) tie rods 30 that are parallel to each other. The connection structure between the booster shell 1 and the tie rod 30 will be described later.
ブースタシエル1の内部は、それに前後往復自
在に収容したブースタピストン2と、その後面に
接する、ゴム等の可撓材料より成形されたピスト
ンダイヤフラム3とにより前部の第1作動室Aと
後部の第2作動室Bとに区画される。 The inside of the booster shell 1 has a booster piston 2 accommodated therein so as to be able to reciprocate back and forth, and a piston diaphragm 3 made of a flexible material such as rubber that is in contact with the rear surface, and a first working chamber A at the front and a first working chamber A at the rear. It is divided into a second working chamber B.
上記ピストンダイヤフラム3は第2図に示すよ
うに、全体として環状をなし、その内、外両外周
縁には環状ビード3a,3bをそれぞれ一体に形
成し、外周側ビード3aを前記両椀状体1F,1
Rの嵌合部に形成した環状溝1cに、また内周側
ビード3bをブースタピストン2後面の環状溝2
aにそれぞれ嵌着する。 As shown in FIG. 2, the piston diaphragm 3 has an annular shape as a whole, and annular beads 3a and 3b are integrally formed on both the inner and outer peripheral edges, and the outer peripheral bead 3a is connected to the two bowl-shaped bodies. 1F,1
The inner peripheral bead 3b is inserted into the annular groove 1c formed in the fitting portion of
Fit each into a.
前記第1作動室Aは負圧導入管4を介して負圧
源である内燃機関の吸気マニホールド(図示せ
ず)内に常時連通し、前記第2作動室Bは後述す
る制御弁5を介して第1作動室Aまたはブースタ
シエル1の後方延長筒1dの端壁1eに開口する
大気導入口6に交互に連通切換え制御されるよう
になつている。 The first working chamber A is always in communication with an intake manifold (not shown) of the internal combustion engine, which is a negative pressure source, through a negative pressure introduction pipe 4, and the second working chamber B is connected through a control valve 5, which will be described later. The air inlet 6 is alternately controlled to communicate with the first working chamber A or with the atmosphere inlet 6 opened in the end wall 1e of the rear extension tube 1d of the booster shell 1.
ブースタピストン2は第1作動室Aに縮設され
た戻しばね7により常時後退方向、即ち第2作動
室B側に弾発され、その後退限はピストンダイヤ
フラム3の背面に***形成した突起3eがブース
タシエル1の後壁内面に当接することにより規制
される。 The booster piston 2 is always urged in the backward direction, that is, toward the second working chamber B, by a return spring 7 contracted in the first working chamber A, and its backward limit is reached by a protrusion 3e formed protrudingly on the back surface of the piston diaphragm 3. It is regulated by coming into contact with the inner surface of the rear wall of the booster shell 1.
ブースタピストン2およびピストンダイヤフラ
ム3には、タイロツド30を貫通させる透孔3
1,32をそれぞれ設け、透孔32は、ブースタ
ピストン2より離間可能なピストンダイヤフラム
3の前面に開口させる。 The booster piston 2 and the piston diaphragm 3 have a through hole 3 through which the tie rod 30 passes.
1 and 32 are provided, respectively, and the through hole 32 is opened at the front surface of the piston diaphragm 3 which can be separated from the booster piston 2.
第2図に示すように、透孔32の周縁には環状
ビード3cを一体に形成し、さらにその環状ビー
ド3cと前記環状ビード3cとの共通接線に略沿
つて両ビード3b,3c間を連結する少なくとも
二本の直線ビード3d,3dをピストンダイヤフ
ラム3の一側面、図示例では後面に***させる。
これらビード3b,3c,3dは協働してピスト
ンダイヤフラム3の引張剛性の強化に寄与する。 As shown in FIG. 2, an annular bead 3c is integrally formed on the periphery of the through hole 32, and the annular beads 3b and 3c are connected approximately along a common tangent between the annular bead 3c and the annular bead 3c. At least two straight beads 3d, 3d are raised on one side of the piston diaphragm 3, in the illustrated example, on the rear surface.
These beads 3b, 3c, and 3d cooperate to enhance the tensile rigidity of the piston diaphragm 3.
ブースタピストン2には、その中心部後面から
軸方向に突出する弁筒8を一体に形成し、これを
前記延長筒1dに設けた平軸受9に摺動自在に支
承させると共にその後端を前記大気導入口6に向
つて開放する。 The booster piston 2 is integrally formed with a valve cylinder 8 projecting in the axial direction from the rear surface of its central portion, and is slidably supported on a flat bearing 9 provided in the extension cylinder 1d, and its rear end is connected to the atmosphere. It opens toward the introduction port 6.
弁筒8内には制御弁5を次のように構成する。
即ち、弁筒8の前部内壁に環状の第1弁座101
を形成し、弁筒8の前部には、入力杆11に連結
されてその前端部を構成する弁ピストン12を摺
合し、この弁ピストン12後端に前記第1弁座1
01に囲繞される環状の第2弁座102を形成す
る。 The control valve 5 is configured in the valve cylinder 8 as follows.
That is, an annular first valve seat 10 1 is provided on the front inner wall of the valve cylinder 8.
A valve piston 12 connected to the input rod 11 and forming the front end thereof is slidably connected to the front part of the valve cylinder 8, and the first valve seat 1 is attached to the rear end of the valve piston 12.
An annular second valve seat 10 2 surrounded by 0 1 is formed.
弁筒8の内壁には、両端を開放した筒状の弁体
13の基端部13aを弁筒8に嵌着される弁体保
持筒14を介して挾止する。この弁体13はゴム
等の弾性材より形成されたもので、その基端部1
3aから薄肉のダイヤフラム13bが半径方向内
方へ延出し、その内周端に厚肉の弁部13cが連
設されており、その弁部13cを前記第1および
第2弁座101,102と対向させる。而して弁部
13cはダイヤフラム13bの変形により前後に
移動でき、そして弁体保持筒14の前端面に当接
することもできる。 A base end 13a of a cylindrical valve element 13 with both ends open is clamped to the inner wall of the valve cylinder 8 via a valve element holding cylinder 14 fitted into the valve cylinder 8. This valve body 13 is made of an elastic material such as rubber, and its base end 1
A thin-walled diaphragm 13b extends radially inward from 3a, and a thick-walled valve portion 13c is connected to the inner peripheral end of the thin-walled diaphragm 13b . Facing 2 . Thus, the valve portion 13c can move back and forth by deforming the diaphragm 13b, and can also come into contact with the front end surface of the valve body holding cylinder 14.
弁部13cには環状の補強板15を埋説し、こ
れに弁部13cを両弁座101,102に向つて付
勢すべく弁ばね16を作用させる。 An annular reinforcing plate 15 is embedded in the valve portion 13c, and a valve spring 16 acts on this to urge the valve portion 13c toward both valve seats 10 1 and 10 2 .
第1弁座101の外側部はブースタピストン2
の通孔17を介して第1作動室Aに、また第1お
よび第2弁座101,102の中間部は別の通孔1
8を介して第2作動室Bに、また第2弁座102
の内側部は弁体13内部を介して大気導入口6に
それぞれ常時連通する。 The outer part of the first valve seat 101 is the booster piston 2
into the first working chamber A through a through hole 17, and an intermediate portion between the first and second valve seats 10 1 and 10 2 through another through hole 1
8 to the second working chamber B, and the second valve seat 10 2
The inner parts of the valve body 13 are in constant communication with the atmospheric air inlet 6 through the inside of the valve body 13.
ブースタピストン2には、その前面中心部に開
口する大径孔19と、その大径孔19の奥部端面
に開口する小径孔20とを設け、その大径孔19
にその奥よりゴム等よりなる弾性ピストン21お
よびそれと同径の出力ピストン22を順次摺合
し、また小径孔20には弾性ピストン21より小
径の反動ピストン23を摺合し、さらに小径孔2
0には前記弁ピストン12の前端面から突出する
小軸12aを突入させて反動ピストン23の後端
面に対向させる。出力ピストン22は前方に突出
する出力杆22aを一体に有する。 The booster piston 2 is provided with a large-diameter hole 19 that opens at the center of its front surface, and a small-diameter hole 20 that opens at the inner end surface of the large-diameter hole 19.
An elastic piston 21 made of rubber or the like and an output piston 22 having the same diameter are sequentially slid into the small diameter hole 20, and a reaction piston 23 having a smaller diameter than the elastic piston 21 is slid into the small diameter hole 20.
0, the small shaft 12a protruding from the front end surface of the valve piston 12 is inserted to face the rear end surface of the reaction piston 23. The output piston 22 integrally has an output rod 22a that projects forward.
入力杆11は戻しばね24により常時後退方向
へ弾発され、その後退限は、入力杆11に螺合し
て取付けた可動ストツパ板25が後方延長筒1d
の端壁1eの内側に当接することにより規制され
る。而して可動ストツパ板25を回転すれば、そ
れと入力杆11との螺合位置が変わるので入力杆
11の後退限を前後に調節することができる。そ
の調節後の可動ストツパ板25の固定は、同じく
入力杆11に螺合したロツクナツト26の緊締に
より行われる。可動ストツパ板25にはこれが前
記大気導入口6を閉塞しないように通気孔27を
穿設する。 The input rod 11 is always urged in the backward direction by the return spring 24, and its retraction limit is determined by the movable stopper plate 25 screwed onto the input rod 11 when the rear extension tube 1d
It is regulated by contacting the inner side of the end wall 1e. If the movable stopper plate 25 is rotated, the screwing position between it and the input rod 11 changes, so that the retraction limit of the input rod 11 can be adjusted back and forth. After the adjustment, the movable stopper plate 25 is fixed by tightening a lock nut 26 which is also screwed onto the input rod 11. A ventilation hole 27 is bored in the movable stopper plate 25 so as not to block the air inlet 6.
弁筒8の外端開口部には大気導入口6からの導
入空気を浄化し、且つ入力杆11の作動を妨げな
いように変形し得るフイルタ28,29を装着す
る。 Filters 28 and 29 are attached to the outer end opening of the valve cylinder 8 to purify the air introduced from the atmospheric air inlet 6 and to be deformable so as not to interfere with the operation of the input rod 11.
次に、タイロツド30とブースタシエル1との
連結構造について説明する。 Next, the connection structure between the tie rod 30 and the booster shell 1 will be explained.
タイロツド30には、ブースタシエル1前壁を
貫通してその前方へ突出する取付ボルト33を一
体に形成し、またブースタシエル1前壁の内面に
当接する連結板34に各タイロツド30の前部が
固着されてタイロツド30相互間が連結される。
そしてブースタシエル1前面に重ねた、ブレーキ
マスタシリンダMのシリンダ本体55と一体の取
付フランジ36に上記取付ボルト33を貫通し、
その先端にナツト35を螺合緊締することにより
タイロツド30、連結板34、ブースタシエル1
前壁および取付フランジ36の四者を一体に連結
する。その際、ボルト33を囲繞するように連結
板34の前面に形成された環状溝37に環状シー
ル部材38を装填して、それをボルト33、連結
板34およびブースタシエル1前壁内面の三者に
気密に接触させる。このように環状シール部材3
8を配設すると、1個の環状シール部材38によ
り、ブースタシエル1の前壁内面と連結板34間
および連結板34とボルト33間の二経路からの
負圧の漏洩を防止することができる。連結板34
は、前記戻しばね7の固定端を支承するばね受板
としても機能するもので、戻しばね7の弾発力を
タイロツド30に負担させてブースタシエル1へ
の負担を無くすることができる。 The tie rod 30 is integrally formed with a mounting bolt 33 that penetrates the front wall of the booster shell 1 and projects forward thereof, and the front part of each tie rod 30 is attached to a connecting plate 34 that abuts the inner surface of the front wall of the booster shell 1. The tie rods 30 are fixedly connected to each other.
Then, the mounting bolt 33 is passed through a mounting flange 36 that is integrated with the cylinder body 55 of the brake master cylinder M, which is stacked on the front surface of the booster shell 1,
By screwing and tightening the nut 35 at the tip, the tie rod 30, the connecting plate 34, and the booster shell 1 are connected.
The front wall and the mounting flange 36 are connected together. At that time, an annular seal member 38 is loaded into an annular groove 37 formed on the front surface of the connecting plate 34 so as to surround the bolt 33, and the annular seal member 38 is inserted between the bolt 33, the connecting plate 34, and the inner surface of the front wall of the booster shell 1. in airtight contact. In this way, the annular seal member 3
8, one annular seal member 38 can prevent negative pressure from leaking from two paths: between the inner surface of the front wall of the booster shell 1 and the connecting plate 34, and between the connecting plate 34 and the bolt 33. . Connecting plate 34
also functions as a spring receiving plate that supports the fixed end of the return spring 7, and the elastic force of the return spring 7 can be borne by the tie rod 30, thereby eliminating the burden on the booster shell 1.
さらにタイロツド30には、ブースタシエル1
後壁を貫通してその後方に突出する取付ボルト3
9と、ブースタシエル1後壁の内面に当接する段
付フランジ41とを一体に形成し、ブースタシエ
ル1後壁の内面に溶接して固着した支筒43に上
記段付フランジ41を嵌入し、それの抜止め環4
2を支筒43に係止することによりタイロツド3
0とブースタシエル1後壁とを一体に連結する。
その際、段付フランジ41の小径部と支筒43間
の環状溝44に環状シール部材45を装填する。 Furthermore, the tie rod 30 has a booster shell 1.
Mounting bolt 3 that penetrates the rear wall and projects to the rear
9 and a stepped flange 41 that abuts the inner surface of the rear wall of the booster shell 1 are integrally formed, and the stepped flange 41 is fitted into a support tube 43 that is welded and fixed to the inner surface of the rear wall of the booster shell 1, Its retaining ring 4
By locking the tie rod 2 to the support tube 43, the tie rod 3
0 and the rear wall of the booster shell 1 are integrally connected.
At this time, the annular seal member 45 is loaded into the annular groove 44 between the small diameter portion of the stepped flange 41 and the support tube 43.
かくして、タイロツド30により前、後部椀状
体1F,1Rおよび取付フランジ36の3者が一
挙に連結されて倍力装置Sおよびマスタシリンダ
Mの組立体が構成されるので、ピストンダイヤフ
ラム3の外周ビード3aを挾持する両椀状体1
F,1Rの対向端部同志の固着手段は最早不要と
なる。 In this way, the front and rear bowl-shaped bodies 1F, 1R and the mounting flange 36 are connected together by the tie rod 30 to form the assembly of the booster S and the master cylinder M, so that the outer bead of the piston diaphragm 3 Both bowl-shaped bodies 1 holding 3a
The means for fixing the opposing ends of F and 1R to each other is no longer necessary.
上記取付ボルト39は、これを自動車の車室前
部壁Wに貫通し、その先端にナツト40を螺合緊
締することによりタイロツド30を車室前部壁W
に固着する。したがつて倍力装置Sおよびマスタ
シリンダMの組立体はタイロツド30を介して車
室前部壁Wに取付けられる。 The mounting bolt 39 is inserted into the front wall W of the vehicle compartment, and a nut 40 is screwed onto the tip of the bolt 39 and tightened to attach the tie rod 30 to the front wall W of the vehicle compartment.
sticks to. Therefore, the assembly of the booster S and the master cylinder M is attached to the front wall W of the passenger compartment via the tie rod 30.
タイロツド30が貫通するブースタピストン2
の透孔31を、そのピストン2の作動を妨げない
ようにシールするためにブースタピストン2とタ
イロツド30との間にシール手段を施す。そのシ
ール手段は、ゴム等の弾性材より形成された蛇腹
状の伸縮ブーツ46より構成され、そのブーツ4
6の筒部46aでタイロツド30の外周を覆い、
前端46bをタイロツド30の外周面に形成され
た環状溝47に嵌着し、一方後端46cを、その
外周面に形成された環状溝48と透孔31の内周
面に突設された環状突起49との嵌合によりブー
スタピストン2に固着する。そして伸縮ブーツ4
6の後端46cとピストンダイヤフラム3前面の
透孔32を囲繞する部分とを離間可能に密着させ
て透孔32をシールする。而して、第1作動室A
の気圧が第2作動室Bのそれよりも高くなつたと
きにのみ、その気圧差により両者46c,3間に
間隙が生じるようになつている。 Booster piston 2 penetrated by tie rod 30
A sealing means is provided between the booster piston 2 and the tie rod 30 in order to seal the through hole 31 so as not to interfere with the operation of the piston 2. The sealing means is composed of a bellows-shaped telescopic boot 46 made of an elastic material such as rubber.
Covering the outer periphery of the tie rod 30 with the cylindrical portion 46a of No. 6,
The front end 46b is fitted into an annular groove 47 formed on the outer circumferential surface of the tie rod 30, while the rear end 46c is fitted into an annular groove 48 formed on the outer circumferential surface and an annular groove protruding from the inner circumferential surface of the through hole 31. It is fixed to the booster piston 2 by fitting with the projection 49. And elastic boots 4
The rear end 46c of the piston diaphragm 3 and a portion surrounding the through hole 32 on the front surface of the piston diaphragm 3 are brought into close contact with each other so as to be able to be separated, thereby sealing the through hole 32. Therefore, the first working chamber A
Only when the atmospheric pressure in the second working chamber B becomes higher than that in the second working chamber B, a gap is created between the two working chambers 46c and 3 due to the difference in atmospheric pressure.
車室において、倍力装置Sの入力杆11の後端
には、固定ブラケツト50に枢支51されるブレ
ーキペダル52を調節連結金具53を介して連結
する。54はブレーキペダル52を後方へ付勢す
る戻しばねである。 In the vehicle interior, a brake pedal 52, which is pivoted 51 on a fixed bracket 50, is connected to the rear end of the input rod 11 of the booster S via an adjustment connecting fitting 53. 54 is a return spring that biases the brake pedal 52 rearward.
ブレーキマスタシリンダMのシリンダ本体55
後端部はブースタシエル1前壁を貫通して第1作
動室A内にこれを突入させ、そのシリンダ本体5
5内の作動ピストン56の後端に倍力装置Sの出
力杆22aを対向させる。 Cylinder body 55 of brake master cylinder M
The rear end penetrates the front wall of the booster shell 1 and enters the first working chamber A, and the cylinder body 5
The output rod 22a of the booster S is opposed to the rear end of the operating piston 56 in the booster S.
次にこの実施例の作用について説明すると、図
示の状態は倍力装置の非作動状態を示すもので、
互いに連結した弁ピストン12、入力杆11およ
びブレーキペダル52は、可動ストツパ板25が
固定の端壁1eに当接する所定の後退位置に戻し
ばね24のばね力を以て保持され、そして弁ピス
トン12は第2弁座102を介して弁部13cの
前面を押圧して、これを弁体保持筒14の前面に
軽く接触させるまで後退させ、それによつて第1
弁座101と弁部13c間に僅かな間隙gを形成
している。このような状態は前記した可動ストツ
パ板25の調節により容易に得ることができる。 Next, to explain the operation of this embodiment, the illustrated state shows the non-operating state of the booster.
The valve piston 12, the input rod 11, and the brake pedal 52, which are connected to each other, are returned to a predetermined retracted position where the movable stopper plate 25 abuts the fixed end wall 1e, and are held by the spring force of the spring 24, and the valve piston 12 is held by the spring force of the spring 24. The front face of the valve part 13c is pressed through the second valve seat 102 , and the front face of the valve part 13c is pushed back until it comes into light contact with the front face of the valve body holding cylinder 14.
A slight gap g is formed between the valve seat 101 and the valve portion 13c. Such a state can be easily obtained by adjusting the movable stopper plate 25 described above.
以上により、エンジン運転中、常に負圧を蓄え
ている第1作動室Aは通孔17、間隙gおよび通
孔18を介して第2作動室Bと連通し、また弁部
13cの前面貫口部は第2弁座102により閉鎖
されるので、第2作動室Bには第1作動室Aの負
圧が伝達して両作動室A,Bの気圧が平衡してい
る。したがつてブースタピストン2も戻しばね7
の弾発力を以て図示の後退位置を占める。 As described above, during engine operation, the first working chamber A, which always stores negative pressure, communicates with the second working chamber B through the through hole 17, the gap g, and the through hole 18, and also through the front through hole of the valve part 13c. Since the second valve seat 102 closes the second valve seat 102 , the negative pressure in the first working chamber A is transmitted to the second working chamber B, and the air pressures in both working chambers A and B are balanced. Therefore, the booster piston 2 also returns to the spring 7.
occupies the illustrated retracted position with a resilient force of .
いま、車両を制動すべくブレーキペダル52を
踏込み、入力杆11および弁ピストン12を前進
させれば、弁ばね16により前方へ付勢される弁
部13cは弁ピストン12に追従して前進する
が、第1弁座101と弁部13cとの間隙gが前
述のように極めて狭いので、弁部13cは、直ち
に第1弁座101に着座して両作動室A,B間の
連通を遮断し、同時に第2弁座102は弁部13
cから離れて第2作動室Bを通孔18および弁体
13内部を介して大気導入口6に連通させる。し
たがつて第2作動室Bには大気が素早く導入さ
れ、該室Bが第1作動室Aよりも高圧となり両室
A,B間に生じる気圧差によりピストンダイヤフ
ラム3に前方への押圧力が作用し、その力を受け
てブースタピストン2が戻しばね7に抗して前進
して、弾性ピストン21を介して出力杆22aを
前進させるので、ブレーキマスタシリンダMの作
動ピストン56を前方へ駆動し、車両に制動がか
けられる。 Now, if the brake pedal 52 is depressed to brake the vehicle and the input rod 11 and the valve piston 12 are moved forward, the valve portion 13c, which is urged forward by the valve spring 16, will move forward following the valve piston 12. Since the gap g between the first valve seat 10 1 and the valve part 13c is extremely narrow as described above, the valve part 13c immediately seats on the first valve seat 10 1 to establish communication between the working chambers A and B. At the same time, the second valve seat 102 is closed to the valve part 13.
The second working chamber B is communicated with the atmosphere inlet 6 through the through hole 18 and the inside of the valve body 13, apart from the second working chamber B. Therefore, the atmosphere is quickly introduced into the second working chamber B, and the pressure in the second working chamber B becomes higher than that in the first working chamber A. Due to the pressure difference between the two chambers A and B, a forward pressing force is applied to the piston diaphragm 3. In response to this force, the booster piston 2 moves forward against the return spring 7 and moves the output rod 22a forward via the elastic piston 21, thereby driving the operating piston 56 of the brake master cylinder M forward. , the vehicle is braked.
上記出力杆22aの前進作動による作動ピスト
ン56の駆動時には、シリンダ本体55に前方へ
のスラスト荷重が作用するが、その荷重はタイロ
ツド30を介して車体、即ち車室前部壁Wに伝達
して支承される。したがつてブースタシエル1に
は上記荷重は殆んど作用しない。 When the actuating piston 56 is driven by the forward movement of the output rod 22a, a forward thrust load acts on the cylinder body 55, but this load is transmitted to the vehicle body, that is, the front wall W of the passenger compartment via the tie rod 30. Supported. Therefore, the above-mentioned load hardly acts on the booster shell 1.
一方、弁ピストン12の小軸12aはその前進
により反動ピストン23を介して弾性ピストン2
1に当接すると、出力杆22aの作動反力による
弾性ピストン21の反動ピストン23側への膨出
変形により前記反力の一部が弁ピストン12を介
してブレーキペダル52側にフイードバツクさ
れ、それにより操縦者は出力杆22aの出力、即
ち制動力を感知することができる。 On the other hand, due to its advancement, the small shaft 12a of the valve piston 12 passes through the reaction piston 23 to the elastic piston 2.
1, a part of the reaction force is fed back to the brake pedal 52 side via the valve piston 12 due to the bulging deformation of the elastic piston 21 toward the reaction piston 23 side due to the actuation reaction force of the output rod 22a. This allows the driver to sense the output of the output rod 22a, that is, the braking force.
次に、ブレーキペダル52の踏込み力を解放す
ると、先ず弁ピストン12にかかる前記反力およ
び戻しばね24の弾発力により入力杆11が後退
し、これにより第2弁座102を弁部13cに着
座させると共にその弁部13cを弁体保持筒14
の前面に当接させるので、弁部13cは入力杆1
1の後退力を受けて軸方向に圧縮変形を生じる。
その結果、第1弁座101と弁部13cとの間に
は当初の間隙gより大きな間隙が形成されるた
め、その間隙を通して両作動室A,Bの気圧が相
互に素早く均衡し、それらの気圧差がなくなれ
ば、ブースタピストン2は、戻しばね7の弾発力
で後退し、ピストンダイヤフラム3の突起3eが
ブースタシエル1の後壁内面に当接して停止す
る。そして、入力杆11が端壁1eに当接したと
き、弁部13cは入力杆11の後退力から解放さ
れて原形に復元するので、第1弁座101との間
隙を再び小間隙gに狭ばめることができる。 Next, when the depressing force of the brake pedal 52 is released, the input rod 11 is moved backward due to the reaction force applied to the valve piston 12 and the elastic force of the return spring 24, which causes the second valve seat 10 2 to move toward the valve portion 13c. and seat the valve portion 13c in the valve body holding cylinder 14.
The valve part 13c is brought into contact with the front surface of the input rod 1.
Compressive deformation occurs in the axial direction due to the retreating force of 1.
As a result, a gap larger than the initial gap g is formed between the first valve seat 101 and the valve part 13c, so that the air pressures in both working chambers A and B are quickly balanced with each other through this gap, and When the pressure difference disappears, the booster piston 2 moves backward by the elastic force of the return spring 7, and the protrusion 3e of the piston diaphragm 3 comes into contact with the inner surface of the rear wall of the booster shell 1 and stops. Then, when the input rod 11 comes into contact with the end wall 1e, the valve part 13c is released from the retreating force of the input rod 11 and returns to its original shape, so that the gap with the first valve seat 101 is reduced to the small gap g again. It can be narrowed down.
第1作動室Aに負圧が蓄えられていない状態で
ブレーキペダル52を踏込み、ブースタピストン
2を前進させた場合には、第1作動室Aの空気が
管路抵抗等により吸気マニホールド側へ十分に排
出されないため、第1作動室Aの残留空気が圧縮
されるが、第1作動室Aの気圧が第2作動室Bの
それよりも高くなれば第1作動室Aの残留空気の
一部はブースタピストン2後面とピストンダイヤ
フラム前面との間に進入し、ピストンダイヤフラ
ム前面は透孔32を囲繞する部分を伸縮ブーツ4
6の後端46cから離す方向に押圧するので、両
者3,46c間に間隙を生じ、その間隙およびピ
ストンダイヤフラム3の透孔32を介して両作動
室A,Bが連通する。したがつて、間隙および透
孔を通して両作動室A,Bの気圧が相互に素早く
均衡するので、ピストンダイヤフラム3に過大な
後方押圧力が作用してそれを後方に膨出変形させ
るような不具合が未然に防止される。 If the brake pedal 52 is depressed and the booster piston 2 is moved forward with no negative pressure stored in the first working chamber A, the air in the first working chamber A will flow sufficiently toward the intake manifold due to pipe resistance, etc. The residual air in the first working chamber A is compressed because the air is not discharged into the first working chamber A. However, if the pressure in the first working chamber A becomes higher than that in the second working chamber B, some of the residual air in the first working chamber A is compressed. enters between the rear surface of the booster piston 2 and the front surface of the piston diaphragm, and the portion of the front surface of the piston diaphragm surrounding the through hole 32 is connected to the telescopic boot 4
6 in a direction away from the rear end 46c, a gap is created between both 3 and 46c, and both working chambers A and B communicate with each other via the gap and the through hole 32 of the piston diaphragm 3. Therefore, the air pressures in both working chambers A and B are quickly balanced through the gap and the through hole, so that problems such as excessive rearward pressing force acting on the piston diaphragm 3 and causing it to bulge rearward are prevented. Prevented in advance.
上記の気圧差がなくなれば、ピストンダイヤフ
ラム3の前面は伸縮ブーツ46の後端46cに再
び密着する。 When the above-mentioned pressure difference disappears, the front surface of the piston diaphragm 3 comes into close contact with the rear end 46c of the telescopic boot 46 again.
以上のように本発明によれば、ブースタピスト
ン2を貫通して互いに並列する少なくとも二本の
タイロツド30の後端を後部椀状体1Rに固着す
ると共に、それらタイロツド30の前部相互間を
連結板34を介して連結し、この連結板34を前
部椀状体1Fの内面に当接させると共に、前記各
タイロツド30の前端に該前部椀状体1F及びシ
リンダ本体55を固着し、さらに前記両椀状体1
F,1Rの対向端部間には、その間の軸方向相対
移動は許容するが周方向相対移動は規制する位置
決め手段1a,1bを設けたので、装置を組立て
る場合には、後端を後部椀状体1Rに予め固定し
た各タイロツド30の前部を連結板34に連結す
るだけで、タイロツド30前部のぐらつきを抑え
てタイロツド30相互の軸間距離を一定に保つこ
とができ、従つてそれらタイロツド30の前端に
前部シエル1Fを固着する際の位置合せが容易で
あり、また前、後部椀状体1F,1Rの対向端部
相互間は前記位置決め手段1a,1bによつて周
方向に正しく位置決めされるから、組立完了状態
においてタイロツド30は倒れを起すことなく互
いに平行関係を保つて正しくセツトされ、以上の
結果、装置の組立作業を迅速的確に行うことがで
きる。 As described above, according to the present invention, the rear ends of at least two tie rods 30 that pass through the booster piston 2 and are parallel to each other are fixed to the rear bowl-shaped body 1R, and the front parts of the tie rods 30 are connected to each other. The connecting plate 34 is brought into contact with the inner surface of the front bowl-shaped body 1F, and the front bowl-shaped body 1F and the cylinder body 55 are fixed to the front end of each tie rod 30. Both bowl-shaped bodies 1
Positioning means 1a and 1b are provided between the opposing ends of F and 1R to allow relative movement in the axial direction but restrict relative movement in the circumferential direction. By simply connecting the front part of each tie rod 30, which has been fixed in advance to the shaped body 1R, to the connecting plate 34, it is possible to suppress the wobbling of the front part of the tie rod 30 and keep the distance between the axes of the tie rods 30 constant. Positioning when fixing the front shell 1F to the front end of the tie rod 30 is easy, and the opposing ends of the front and rear bowl-shaped bodies 1F and 1R are aligned in the circumferential direction by the positioning means 1a and 1b. Since they are positioned correctly, the tie rods 30 are correctly set in a parallel relationship without falling down when the assembly is completed, and as a result, the assembly work of the device can be carried out quickly and accurately.
さらにシリンダ本体55及び両椀状体1F,1
Rの三者を前記タイロツド30によつて結合して
いるから、そのタイロツド30によつて両椀状体
1F,1Rの対向端部相互間の軸方向相対移動を
確実に規制でき、従つてその軸方向相対移動を前
記位置決め手段1a,1bが許容する構造のもの
であるも何等不都合はない。 Furthermore, the cylinder body 55 and both bowl-shaped bodies 1F, 1
Since the three members R are connected by the tie rod 30, the tie rod 30 can reliably restrict the relative movement in the axial direction between the opposing ends of the two bowl-shaped bodies 1F and 1R. There is no problem in having a structure in which the positioning means 1a, 1b allow relative movement in the axial direction.
そして前述の如く、タイロツド30相互の軸間
距離を一定に保つリテーナとして機能する前記連
結板34が、前部シエル1Fの剛性を高める補強
板としての機能も兼備するから、前記位置決め手
段1a,1bが両椀状体1F,1Rの軸方向相対
移動を許容する単純構造のもので足りることと相
俟つて、装置の構造簡素化に大いに寄与し得る。 As described above, since the connecting plate 34, which functions as a retainer to keep the distance between the axis of the tie rods 30 constant, also functions as a reinforcing plate to increase the rigidity of the front shell 1F, the positioning means 1a, 1b It is sufficient to have a simple structure that allows relative movement in the axial direction of both bowl-shaped bodies 1F and 1R, and this can greatly contribute to simplifying the structure of the apparatus.
第1図は本発明組立体の一実施例を示す縦断側
面図、第2図はそれにおけるピストンダイヤフラ
ムの平面図である。
M……マスタシリンダ、S……倍力装置、1…
…ブースタシエル、1F……前部椀状体、1R…
…後部椀状体、1a,1b……位置決め手段を構
成する爪片、切欠き、34……連結板、2……ブ
ースタピストン、3……ピストンダイヤフラム、
30……タイロツド、55……シリンダ本体、5
6……作動ピストン。
FIG. 1 is a longitudinal sectional side view showing one embodiment of the assembly of the present invention, and FIG. 2 is a plan view of a piston diaphragm therein. M...Master cylinder, S...Boosting device, 1...
...Booster Ciel, 1F...Front bowl-shaped body, 1R...
... Rear bowl-shaped body, 1a, 1b ... Claw pieces and notches constituting positioning means, 34 ... Connection plate, 2 ... Booster piston, 3 ... Piston diaphragm,
30... Tie rod, 55... Cylinder body, 5
6... Working piston.
Claims (1)
ピストン2に内周端を結着したピストンダイヤフ
ラム3とを収容する倍力装置Sのブースタシエル
1を前部椀状体1Fと後部椀状体1Rとに分割
し、この両椀状体1F,1Rの対向端部間に前記
ピストンダイヤフラム3の外周端を挟入し、前記
前部椀状体1F前面にマスタシリンダMのシリン
ダ本体55を配設し、このシリンダ本体55に摺
合する作動ピストン56に前記ブースタピストン
2を連接したものにおいて、前記ブースタピスト
ン2を貫通して互いに並列する少なくとも二本の
タイロツド30の後端を前記後部椀状体1Rに固
着すると共に、それらタイロツド30の前部相互
間を連結板34を介して連結し、この連結板34
を前記前部椀状体1Fの内面に当接させると共
に、前記各タイロツド30の前端に該前部椀状体
1F及び前記シリンダ本体55を固着し、さらに
前記両椀状体1F,1Rの対向端部間には、その
間の軸方向相対移動は許容するが周方向相対移動
は規制する位置決め手段1a,1bを設けたこと
を特徴とする、倍力装置およびマスタシリンダの
組立体。1. The booster shell 1 of the booster S, which houses the booster piston 2 and the piston diaphragm 3 whose inner peripheral end is connected to the booster piston 2, is attached to the front bowl-shaped body 1F and the rear bowl-shaped body 1R. The outer peripheral end of the piston diaphragm 3 is inserted between the opposing ends of both the bowl-shaped bodies 1F and 1R, and the cylinder body 55 of the master cylinder M is arranged on the front surface of the front bowl-shaped body 1F. In the case where the booster piston 2 is connected to the operating piston 56 that slides on the cylinder body 55, the rear ends of at least two tie rods 30 that pass through the booster piston 2 and are parallel to each other are fixed to the rear bowl-shaped body 1R. At the same time, the front parts of the tie rods 30 are connected to each other via a connecting plate 34, and this connecting plate 34
is brought into contact with the inner surface of the front bowl-shaped body 1F, and the front bowl-shaped body 1F and the cylinder body 55 are fixed to the front end of each of the tie rods 30, and further the bowl-shaped bodies 1F and 1R are opposed to each other. An assembly of a booster and a master cylinder, characterized in that positioning means 1a and 1b are provided between the ends to permit relative movement in the axial direction but restrict relative movement in the circumferential direction.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172479A JPS5751561A (en) | 1980-12-06 | 1980-12-06 | Assembly unit of power magnifying device and master cylinder |
GB8117096A GB2092251B (en) | 1980-12-06 | 1981-06-04 | Vacuum booster assembly |
US06/712,463 US4594854A (en) | 1980-12-06 | 1985-03-15 | Assembly of vacuum booster and master cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172479A JPS5751561A (en) | 1980-12-06 | 1980-12-06 | Assembly unit of power magnifying device and master cylinder |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55125743A Division JPS5751556A (en) | 1980-09-10 | 1980-09-10 | Negative pressure type doubler device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5751561A JPS5751561A (en) | 1982-03-26 |
JPS6340712B2 true JPS6340712B2 (en) | 1988-08-12 |
Family
ID=15942743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55172479A Granted JPS5751561A (en) | 1980-12-06 | 1980-12-06 | Assembly unit of power magnifying device and master cylinder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5751561A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5477873A (en) * | 1977-10-20 | 1979-06-21 | Girling Ltd | Servo booster assembly for vehicle brake system |
-
1980
- 1980-12-06 JP JP55172479A patent/JPS5751561A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5477873A (en) * | 1977-10-20 | 1979-06-21 | Girling Ltd | Servo booster assembly for vehicle brake system |
Also Published As
Publication number | Publication date |
---|---|
JPS5751561A (en) | 1982-03-26 |
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