JPH03126755U - - Google Patents
Info
- Publication number
- JPH03126755U JPH03126755U JP3703890U JP3703890U JPH03126755U JP H03126755 U JPH03126755 U JP H03126755U JP 3703890 U JP3703890 U JP 3703890U JP 3703890 U JP3703890 U JP 3703890U JP H03126755 U JPH03126755 U JP H03126755U
- Authority
- JP
- Japan
- Prior art keywords
- pressure chamber
- power piston
- negative pressure
- inner bead
- diaphragm
- 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.)
- Pending
Links
- 239000011324 bead Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
Description
第１図は本考案によるタンデム型負圧倍力装置
をブレーキ倍力装置に適用した一実施例を示す縦
断面図、第２図は第１図における−線に沿う
断面図、第３図は第１図における−線に沿う
断面図、第４図は第１図におけるＡ部拡大詳細図
、第５図はフロントダイヤフラムのビード部近傍
部における軸方向に直交する面に沿つた断面図、
第６図はフロントダイヤフラムの挙動を説明する
図、第７図は第１図におけるＢ部拡大詳細図、第
８図はシール部材の斜視図、第９図は第８図にお
ける−線に沿う断面図である。
１……ブレーキ倍力装置（負圧倍力装置）、２
……フロントシエル、３……リヤシエル、４……
センタプレート、５……フロント室、５ａ……第
１定圧室、５ｂ……第１変圧室、６……リヤ室、
６ａ……第２定圧室、６ｂ……第２変圧室、８…
…フロントパワーピストンプレート、８ｄ……カ
ール部、９……リヤパワーピストンプレート、９
ｄ……カール部、１２……フロントダイヤフラム
、１２ｂ……ビード部、１２ｃ……溝、１３……
リヤダイヤフラム、１３ｂ……ビード部、１３ｃ
……溝、１５……シール部材、Ｅ……エアー通路
、Ｖ……バキユーム通路。
FIG. 1 is a longitudinal sectional view showing an embodiment of the tandem negative pressure booster according to the present invention applied to a brake booster, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 1. FIG. 4 is an enlarged detailed view of section A in FIG. 1. FIG. 5 is a sectional view taken along a plane perpendicular to the axial direction in the vicinity of the bead of the front diaphragm.
Fig. 6 is a diagram explaining the behavior of the front diaphragm, Fig. 7 is an enlarged detailed view of part B in Fig. 1, Fig. 8 is a perspective view of the sealing member, and Fig. 9 is a cross section taken along the - line in Fig. 8. It is a diagram. 1... Brake booster (negative pressure booster), 2
...Front shell, 3...Rear shell, 4...
Center plate, 5...Front chamber, 5a...First constant pressure chamber, 5b...First variable pressure chamber, 6...Rear chamber,
6a... Second constant pressure chamber, 6b... Second variable pressure chamber, 8...
...Front power piston plate, 8d...Curl part, 9...Rear power piston plate, 9
d...Curl part, 12...Front diaphragm, 12b...Bead part, 12c...Groove, 13...
Rear diaphragm, 13b...Bead part, 13c
... Groove, 15... Seal member, E... Air passage, V... Vacuum passage.
Claims (1)
れた空間内がパワーピストンによつて、常時負圧
が導入される定圧室と作動時に大気が導入される
変圧室に区画され、バルブボデイ内に配設されて
いる制御弁により作動時に前記変圧室内に大気が
導入されて出力するようになつている負圧倍力装
置において、 前記パワーピストンは、前記バルブボデイに取
り付られ、外周縁にカール部が形成されたパワー
ピストンプレートと、少なくとも内周ビード部が
前記カール部に嵌着されているダイヤフラムとか
ら構成されると共に、前記内周ビード部に、前記
ダイヤフラムの内周ビード部近傍部分が後方へ所
定量膨らんだとき、定圧室と変圧室とを連通する
溝が形成されていることを特徴とする負圧倍力装
置。[Claims for Utility Model Registration] The space formed by the front shell and rear shell is divided by a power piston into a constant pressure chamber into which negative pressure is constantly introduced and a variable pressure chamber into which atmospheric air is introduced during operation. In the negative pressure booster, in which atmospheric air is introduced into the variable pressure chamber and outputted when activated by a control valve disposed in the valve body, the power piston is attached to the valve body and is connected to the outside. Consisting of a power piston plate having a curled portion on its periphery, and a diaphragm having at least an inner bead portion fitted into the curled portion, an inner bead portion of the diaphragm is attached to the inner bead portion. A negative pressure booster characterized in that a groove is formed that communicates a constant pressure chamber and a variable pressure chamber when a nearby portion swells rearward by a predetermined amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3703890U JPH03126755U (en) | 1990-04-06 | 1990-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3703890U JPH03126755U (en) | 1990-04-06 | 1990-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03126755U true JPH03126755U (en) | 1991-12-20 |
Family
ID=31543793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3703890U Pending JPH03126755U (en) | 1990-04-06 | 1990-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03126755U (en) |
-
1990
- 1990-04-06 JP JP3703890U patent/JPH03126755U/ja active Pending
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