JPH0411178U - - Google Patents
Info
- Publication number
- JPH0411178U JPH0411178U JP5190490U JP5190490U JPH0411178U JP H0411178 U JPH0411178 U JP H0411178U JP 5190490 U JP5190490 U JP 5190490U JP 5190490 U JP5190490 U JP 5190490U JP H0411178 U JPH0411178 U JP H0411178U
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- outer peripheral
- constant pressure
- peripheral 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 5
Landscapes
- Braking Systems And Boosters (AREA)
Description
第１図は、本考案のタンデム型気圧式倍力装置
の一実施例を示す縦断面図、第２図は、従来のタ
ンデム型気圧式倍力装置の一例を示す縦断面図で
ある。
２６……センタプレート、２７……ハウジング
、２８，２９……室、３１……フロントパワーピ
ストン、３２……フロントダイアフラム、３２ａ
……外周ビード部、３３……リアパワーピストン
、３４……リアダイアフラム、３５……段部、３
６……フロント定圧室、３７……フロント変圧室
、３８……リア定圧室、３９……リア変圧室、４
０……連通路、４１……拡大部、４３……貫通孔
、４５……リング部材。
FIG. 1 is a longitudinal sectional view showing an embodiment of a tandem type pneumatic booster according to the present invention, and FIG. 2 is a longitudinal sectional view showing an example of a conventional tandem type pneumatic booster. 26... Center plate, 27... Housing, 28, 29... Chamber, 31... Front power piston, 32... Front diaphragm, 32a
...Outer bead portion, 33...Rear power piston, 34...Rear diaphragm, 35...Stepped portion, 3
6...Front constant pressure chamber, 37...Front variable pressure chamber, 38...Rear constant pressure chamber, 39...Rear variable pressure chamber, 4
0...Communication path, 41...Enlarged portion, 43...Through hole, 45...Ring member.
Claims (1)
に区画し、各室をパワーピストンとダイアフラム
とにより、負圧源に連通するフロント定圧室およ
びリア定圧室と負圧または大気が導入されるフロ
ント変圧室およびリア変圧室とにそれぞれ画成し
、各変圧室に大気を導入して各定圧室と各変圧室
とに生じる圧力差によりパワーピストンを前進さ
せて出力ロツドに倍力した推力を伝達するタンデ
ム型気圧式倍力装置において、 前記ハウジングの外周側に段部を形成し、該段
部とセンタプレートでフロント側のダイアフラム
の外周ビード部を挟持し、前記段部に部分的に外
側に膨出する拡大部を形成し、センタプレートに
おける前記外周ビード部の外方に貫通孔を設け、
前記拡大部と該貫通孔とでフロント定圧室とリア
定圧室とを連通する連通路を形成するとともに、
前記ダイアフラムの外周ビード部に沿つて係合し
て該外周ビード部を保持するリング部材を設けた
ことを特徴とするタンデム型気圧式倍力装置。[Claims for Utility Model Registration] The inside of the housing is divided into two chambers by a center plate, and each chamber is separated by a power piston and a diaphragm into a front constant pressure chamber and a rear constant pressure chamber communicating with a negative pressure source, and negative pressure or the atmosphere. A front pressure change chamber and a rear pressure change chamber are respectively defined, and atmospheric air is introduced into each pressure change chamber, and the pressure difference created between each constant pressure chamber and each pressure change chamber advances the power piston and boosts the output rod. In a tandem type pneumatic booster that transmits a thrust force, a stepped portion is formed on the outer peripheral side of the housing, an outer peripheral bead portion of a front diaphragm is sandwiched between the stepped portion and the center plate, and a portion is formed on the stepped portion. forming an enlarged portion that bulges outward, and providing a through hole outside the outer peripheral bead portion of the center plate;
The enlarged portion and the through hole form a communication path that communicates the front constant pressure chamber and the rear constant pressure chamber, and
A tandem pneumatic booster characterized in that a ring member is provided that engages along the outer peripheral bead portion of the diaphragm and holds the outer peripheral bead portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5190490U JPH0739719Y2 (en) | 1990-05-18 | 1990-05-18 | Tandem type pneumatic booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5190490U JPH0739719Y2 (en) | 1990-05-18 | 1990-05-18 | Tandem type pneumatic booster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0411178U true JPH0411178U (en) | 1992-01-30 |
| JPH0739719Y2 JPH0739719Y2 (en) | 1995-09-13 |
Family
ID=31571751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5190490U Expired - Lifetime JPH0739719Y2 (en) | 1990-05-18 | 1990-05-18 | Tandem type pneumatic booster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739719Y2 (en) |
-
1990
- 1990-05-18 JP JP5190490U patent/JPH0739719Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0739719Y2 (en) | 1995-09-13 |
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