JPS6244841Y2 - - Google Patents

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Publication number
JPS6244841Y2
JPS6244841Y2 JP1982003905U JP390582U JPS6244841Y2 JP S6244841 Y2 JPS6244841 Y2 JP S6244841Y2 JP 1982003905 U JP1982003905 U JP 1982003905U JP 390582 U JP390582 U JP 390582U JP S6244841 Y2 JPS6244841 Y2 JP S6244841Y2
Authority
JP
Japan
Prior art keywords
piston
cylindrical member
cylindrical
diaphragm
pistons
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
Application number
JP1982003905U
Other languages
Japanese (ja)
Other versions
JPS58106263U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP390582U priority Critical patent/JPS58106263U/en
Publication of JPS58106263U publication Critical patent/JPS58106263U/en
Application granted granted Critical
Publication of JPS6244841Y2 publication Critical patent/JPS6244841Y2/ja
Granted legal-status Critical Current

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  • Braking Systems And Boosters (AREA)

Description

【考案の詳細な説明】 本考案は、タンデム型ブレーキ倍力装置に係
り、特にフロント、リアの二つのピストン間を連
結する筒状部材と、フロントピストンとの結合部
の改良に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tandem brake booster, and more particularly to an improvement in the connecting portion between a cylindrical member connecting two front and rear pistons and a front piston.

タンデム型ブレーキ倍力装置は、筒状部材によ
つて連結されたフロント、リアの二つのピストン
とこれら両ピストンにそれぞれ支持された一対の
ダイアフラムとを備え、これらダイアフラムと両
ダイアフラム間に配設されたセンタープレートに
よつてシエル内を区画して4つの圧力室を形成
し、これら圧力室間に圧力差を生ぜしめこの圧力
差により両ピストンを変位させてブレーキ作用を
行なわせるものである。従来の倍力装置において
は、フロントピストンと筒状部材との結合はねじ
り結合によつていた為に、ダイアフラムにねじり
応力が加わつておりダイアフラムが破損しやすい
という欠点があつた。又、両者を一体として成形
する場合には板厚が一定であるための重量が重く
なるという欠点があつた。
The tandem brake booster includes two pistons, front and rear, connected by a cylindrical member, and a pair of diaphragms supported by these pistons, respectively, and a tandem brake booster is provided between the diaphragms and the diaphragms. The interior of the shell is divided by a center plate, forming four pressure chambers, and a pressure difference is created between these pressure chambers, and this pressure difference displaces both pistons to perform a braking action. In conventional boosters, the front piston and the cylindrical member are connected by torsion, which has the disadvantage that torsional stress is applied to the diaphragm and the diaphragm is easily damaged. Furthermore, when the two are molded as one body, there is a drawback that the weight becomes heavy because the thickness of the plate is constant.

本考案は、以上のような欠点に鑑みなされたも
ので、フロントピストンと筒状部材との結合部
に、一方には貫通孔を有する筒状突起を他方には
この突起を受入れる孔を形成し、これら突起と孔
とを嵌合させてカシメ結合することによつて、組
立の容易化及び装置の軽量化を図るとともにダイ
アフラムの破損のおそれを除くことができるタン
デム型ブレーキ倍力装置を提供することを目的と
する。
The present invention was developed in view of the above-mentioned drawbacks, and includes forming a cylindrical protrusion with a through hole on one side and a hole for receiving the protrusion on the other side at the joint between the front piston and the cylindrical member. To provide a tandem brake booster which facilitates assembly, reduces the weight of the device, and eliminates the risk of damage to the diaphragm by fitting these protrusions and holes and caulking them together. The purpose is to

以下、図示実施例に基づいて本考案を説明す
る。第1図において、1は前方シエル、2は後方
シエルであり、両シエル1,2で構成された密閉
容器内には、板体からなるフロントピストン3
と、バルプボデイ4に一体にされたリヤピストン
5とが直列に配置され、両ピストン3,5は筒状
部材6によつて連結されている。また7,8はそ
れぞれこのフロント、リヤのピストン3,5と共
に容器内を分割するダイアフラム、9はピストン
3,5間においてフロントピストン3側に小室を
形成するセンタープレートであり、上記筒状部材
6はこのセンタープレート9に対し気密を保持し
て摺動できるように構成されている。かくしてフ
ロント、リヤの二つのピストン3,5の前後に
は、それぞれ圧力室A,BおよびC,Dが形成さ
れ、この圧力室AとCとは筒状部材6の内部通路
10によつて連通し、また圧力室BとDも、ダイ
アフラム8の通路8a及び後方シエル2の通路2
aにより相互に連通している。11は圧力室Aに
開口させた作動圧力導入口であり、車輌エンジン
の負圧発生部に接続される。
Hereinafter, the present invention will be explained based on illustrated embodiments. In FIG. 1, 1 is a front shell, 2 is a rear shell, and inside a sealed container composed of both shells 1 and 2 is a front piston 3 made of a plate.
and a rear piston 5 integrated with the valve body 4 are arranged in series, and both pistons 3 and 5 are connected by a cylindrical member 6. Also, 7 and 8 are diaphragms that divide the inside of the container together with the front and rear pistons 3 and 5, respectively, 9 is a center plate that forms a small chamber on the front piston 3 side between the pistons 3 and 5, and the cylindrical member 6 is configured to be able to slide on the center plate 9 while maintaining airtightness. In this way, pressure chambers A, B and C, D are formed before and after the two front and rear pistons 3, 5, respectively, and these pressure chambers A and C communicate with each other through the internal passage 10 of the cylindrical member 6. The pressure chambers B and D are also connected to the passage 8a of the diaphragm 8 and the passage 2 of the rear shell 2.
They communicate with each other by a. Reference numeral 11 denotes an operating pressure inlet opening into the pressure chamber A, and is connected to a negative pressure generating section of the vehicle engine.

しかして、12はフロントピストン3側から筒
状部材6に挿入された被動杆、13はリヤピスト
ン5の後部から上記バルブボデイ4内に向けて挿
入された操作杆であつて、被動杆12は図示しな
いマスタシリンダに、操作杆13は同じく図示し
ないブレーキペダルにそれぞれ連動している。こ
の操作杆13の先端には周知の弁機構(図示せ
ず)が設けられ、操作杆13の変位に応じ圧力室
Cと圧力室Dとの連通遮断制御を行なう。なお1
4は操作杆13と被動杆12との間に介在させた
弾性体等よりなる加圧変形部材であり、ブレーキ
反力は被動杆12、加圧変形部材14および操作
杆13を介してブレーキペダルに伝達される。
The driven rod 12 is inserted into the cylindrical member 6 from the front piston 3 side, and the operating rod 13 is inserted into the valve body 4 from the rear of the rear piston 5. The driven rod 12 is not shown in the figure. The operating lever 13 is respectively linked to a brake pedal (not shown), and a master cylinder (not shown). A well-known valve mechanism (not shown) is provided at the tip of the operating rod 13, and controls communication and interruption between the pressure chambers C and D in accordance with the displacement of the operating rod 13. Note 1
4 is a pressure deformation member made of an elastic body interposed between the operating rod 13 and the driven rod 12, and the brake reaction force is applied to the brake pedal via the driven rod 12, the pressure deformation member 14, and the operation rod 13. transmitted to.

このタンデム型ブレーキ倍力装置では、ブレー
キペダルに踏力が加えられず操作杆13が変位し
ない図示状態では、弁機構が圧力室CとDを連通
させるので圧力室A,B,C,Dがすべて同圧に
保たれ両ピストン3,5は変位しない。これに対
し、操作杆13が図の左方に変位するブレーキ操
作時には、弁機構が圧力室CとDとの連通を断つ
と共に圧力室Dに大気を導入する。前述のよう
に、圧力室Cは通路10により圧力室Aと連通
し、圧力室Dは通路8a及び2aにより圧力室B
と連通しているから、上記弁機構18の作動によ
り大気の導入される圧力室B,Dと、作動圧力導
入口11を介し負圧源と連通している圧力室A,
Cとの間には圧力差が発生し、この圧力差によつ
てフロント、リヤのピストン3,5が変位する結
果、被作動杆12がマスタシリンダを作動させて
ブレーキ作用が行なわれることになる。
In this tandem type brake booster, in the illustrated state where no pedal force is applied to the brake pedal and the operating rod 13 is not displaced, the valve mechanism connects the pressure chambers C and D, so that all pressure chambers A, B, C, and D are connected to each other. The pressure is maintained at the same level and both pistons 3 and 5 do not displace. On the other hand, during a brake operation in which the operating rod 13 is displaced to the left in the drawing, the valve mechanism cuts off the communication between the pressure chambers C and D and introduces the atmosphere into the pressure chamber D. As mentioned above, pressure chamber C communicates with pressure chamber A through passage 10, and pressure chamber D communicates with pressure chamber B through passages 8a and 2a.
Therefore, the pressure chambers B and D into which atmospheric air is introduced by the operation of the valve mechanism 18, and the pressure chambers A and D, which are in communication with the negative pressure source via the operating pressure inlet 11,
A pressure difference is generated between the cylinder and the cylinder C, and this pressure difference causes the front and rear pistons 3 and 5 to displace, and as a result, the actuated rod 12 operates the master cylinder and performs a braking action. .

ここで、フロントピストン3と筒状部材6との
接合部分について詳細に説明する。第2図aは結
合前の状態、bは結合後の状態を示し、図におい
て、15は筒状部材6の前方側に設けられたフラ
ンジ、16はこのフランジ15の所定位置に複数
個設けられた円筒状突起である。この突起16は
バーリング成形等によつて形成され筒状部内に貫
通孔17が形成されている。18は上記フランジ
15の基部を前方へ向けて突出させて、フランジ
15の後面側に形成された環状凹陥部であり、こ
の凹陥部18内に上記ダイアフラム7の内周縁に
設けられた厚肉部19が収容される。一方、フロ
ントピストン3の内周側の上記フランジ15と結
合される接合部20には、上記各円筒状突起16
と対応する位置にこの突起を挿入しうる円孔21
がそれぞれ穿設されている。そして、これら各円
筒状突起16を各円孔21内に挿入した後カシメ
によつてフロントピストン3と筒状部材6の両者
を結合させる。このようにカシメ結合をすること
によつて組立を極めて簡単に行なうことができ、
又、ネジリ結合をすることによつて生じるダイア
フラムの破損のおそれを除き、更に、ピストン3
と筒状部材6を一体で成形する場合よりもピスト
ン3を薄肉化できるので装置の軽量化を図ること
ができる。しかも、溶接等の手段によるよりも安
価で品質の安定したものを得ることができる。
又、円筒状突起16を貫通孔17として形成した
ことにより、ダイアフラム7組付けの際にピスト
ン3とダイアフラム7との間に溜つた空気を排出
する通路としての機能をも持たせることができ
る。
Here, the joint portion between the front piston 3 and the cylindrical member 6 will be explained in detail. FIG. 2a shows the state before coupling, and FIG. 2b shows the state after coupling. In the figure, 15 is a flange provided on the front side of the cylindrical member 6, and 16 is a plurality of flanges provided at predetermined positions of this flange 15. It is a cylindrical protrusion. This protrusion 16 is formed by burring molding or the like, and a through hole 17 is formed in the cylindrical portion. Reference numeral 18 denotes an annular concave portion formed on the rear surface side of the flange 15 by protruding the base of the flange 15 forward, and a thick wall portion provided on the inner circumferential edge of the diaphragm 7 is located within this concave portion 18. 19 are accommodated. On the other hand, each of the cylindrical projections 16 is provided at the joint 20 that is connected to the flange 15 on the inner peripheral side of the front piston 3.
A circular hole 21 into which this protrusion can be inserted into a position corresponding to
are drilled in each. After each of these cylindrical projections 16 is inserted into each circular hole 21, both the front piston 3 and the cylindrical member 6 are coupled together by caulking. By making the caulking connection in this way, assembly can be performed extremely easily.
Furthermore, in addition to eliminating the risk of damage to the diaphragm caused by the torsional connection, the piston 3
Since the piston 3 can be made thinner than when the piston 3 and the cylindrical member 6 are integrally molded, the weight of the device can be reduced. Moreover, it is possible to obtain a product with stable quality at a lower cost than by means such as welding.
Further, by forming the cylindrical projection 16 as a through hole 17, it can also function as a passage for discharging air accumulated between the piston 3 and the diaphragm 7 when the diaphragm 7 is assembled.

尚、上記フロントピストン3の内周端は、ピス
トン3と筒状部材6とを接合した状態で、上記凹
陥部18の開口部内に位置するように延長され、
かつ、その先端22は凹陥部18内方へ向けて折
曲されている。そして、ダイアフラム7内周の厚
肉部19には係合溝23が刻設され、この係合溝
23と上記ピストン3先端の突出係合部22とが
係合してダイアフラム7をピストン3に支持させ
るようにしている。従つて、ダイアフラム7の厚
肉部19を押圧して上記凹陥部18内に挿入する
ことにより容易にダイアフラムを係合支持させる
ことができる。
The inner peripheral end of the front piston 3 is extended so as to be located within the opening of the recessed portion 18 in a state where the piston 3 and the cylindrical member 6 are joined.
Moreover, the tip 22 is bent toward the inside of the concave portion 18 . An engagement groove 23 is formed in the thick walled portion 19 of the inner circumference of the diaphragm 7, and the engagement groove 23 and the protruding engagement portion 22 at the tip of the piston 3 engage with each other, so that the diaphragm 7 is attached to the piston 3. I'm trying to support it. Therefore, by pressing the thick portion 19 of the diaphragm 7 and inserting it into the recessed portion 18, the diaphragm can be easily engaged and supported.

尚、本実施例の有底筒状突起16はプレス等の
周知の手段によつて形成しうることはいうまでも
ない。
It goes without saying that the bottomed cylindrical projection 16 of this embodiment can be formed by known means such as pressing.

以上述べたように、本考案によれば、タンデム
型ブレーキ倍力装置の組立てを容易に行なうこと
ができ、しかも安価で品質の安定した装置を提供
することができる。特に、本考案においては、フ
ロントピストン又は筒状部材のフランジのいずれ
か一方に貫通孔を有する複数の筒状突起を形成
し、他方にはこれら各突起を挿通可能な孔を穿設
し、これら各突起と各孔とを嵌合させてカシメ結
合した構成としたため、上記筒状突起の貫通孔は
ダイヤフラムとピストンとの間に溜つた空気の排
出通路として機能し、特に負圧導入前のピストン
作動時や急作動時において、ダイヤフラムの折曲
やこれのシエルとの間の噛込み防止に役立つ効果
があり、しかも上記カシメ結合態様は従来の溶接
結合のように溶接後メツキ作業を施す二重作業を
省略し得るとともに、溶接接合部に浸透したメツ
キ液の酸洗い等に要する防錆上の後処理配慮を全
く必要とせず、簡潔な組付作業で倍力装置のピス
トンとしての良好な強度および機能を保持させ得
る利点がある。
As described above, according to the present invention, it is possible to easily assemble a tandem brake booster, and moreover, it is possible to provide an inexpensive and stable quality device. In particular, in the present invention, a plurality of cylindrical protrusions having through holes are formed on either the front piston or the flange of the cylindrical member, and holes through which each of these protrusions can be inserted are bored on the other side. Since each protrusion and each hole are fitted and caulked together, the through hole of the cylindrical protrusion functions as a discharge passage for air accumulated between the diaphragm and the piston, especially when the piston is closed before negative pressure is introduced. This has the effect of preventing the diaphragm from bending or becoming jammed with the shell during actuation or sudden actuation.Moreover, the caulking connection described above is a double-sided method that requires plating after welding, unlike conventional welding connections. Not only can the work be omitted, there is no need for post-treatment consideration for rust prevention such as pickling the plating liquid that has penetrated into the welded joint, and it has good strength as a piston of a booster with simple assembly work. It also has the advantage of retaining functionality.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本考案の一実施例に係るタンデム型
ブレーキ倍力装置の全体を示す部分断面図、第2
図a,bはそれぞれフロントピストンと筒状部材
との結合前及び結合後の状態を示す断面図。 3:フロントピストン、5:リアピストン、
6:筒状部材、15:筒状部材のフランジ、1
6:筒状突起、21:フロントピストンの孔。
FIG. 1 is a partial cross-sectional view showing the entire tandem brake booster according to an embodiment of the present invention, and FIG.
Figures a and b are sectional views showing the state before and after the front piston and the cylindrical member are connected, respectively. 3: Front piston, 5: Rear piston,
6: cylindrical member, 15: flange of cylindrical member, 1
6: Cylindrical projection, 21: Front piston hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 圧力差を受けて進退動するフロント、リアの二
つのピストンと、この両ピストンを連結する筒状
部材とを備え、上記フロントピストンが上記筒状
部材の前方端に形成されたフランジに固定されて
成るタンデム型ブレーキ倍力装置において、上記
フロントピストン又は筒状部材のフランジのいず
れか一方に貫通孔を有する複数の筒状突起を形成
し、他方にはこれら各突起を挿通可能な孔を穿設
し、これら各突起と各孔とを嵌合させてカシメ結
合したことを特徴とするタンデム型ブレーキ倍力
装置。
The piston includes two front and rear pistons that move forward and backward in response to a pressure difference, and a cylindrical member that connects the two pistons, and the front piston is fixed to a flange formed at the front end of the cylindrical member. In the tandem type brake booster, a plurality of cylindrical protrusions having through holes are formed on either the front piston or the flange of the cylindrical member, and holes through which each of these protrusions can be inserted are bored on the other side. A tandem type brake booster characterized in that each of these protrusions and each hole are fitted and connected by caulking.
JP390582U 1982-01-14 1982-01-14 Tandem type brake booster Granted JPS58106263U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP390582U JPS58106263U (en) 1982-01-14 1982-01-14 Tandem type brake booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP390582U JPS58106263U (en) 1982-01-14 1982-01-14 Tandem type brake booster

Publications (2)

Publication Number Publication Date
JPS58106263U JPS58106263U (en) 1983-07-19
JPS6244841Y2 true JPS6244841Y2 (en) 1987-11-28

Family

ID=30016785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP390582U Granted JPS58106263U (en) 1982-01-14 1982-01-14 Tandem type brake booster

Country Status (1)

Country Link
JP (1) JPS58106263U (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS489962U (en) * 1971-06-16 1973-02-03

Also Published As

Publication number Publication date
JPS58106263U (en) 1983-07-19

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