JPH0299061U - - Google Patents
Info
- Publication number
- JPH0299061U JPH0299061U JP734289U JP734289U JPH0299061U JP H0299061 U JPH0299061 U JP H0299061U JP 734289 U JP734289 U JP 734289U JP 734289 U JP734289 U JP 734289U JP H0299061 U JPH0299061 U JP H0299061U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- power piston
- pressure chamber
- valve
- biasing means
- 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
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 3
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
Description
第１図は本考案に従つた負圧式倍力装置の一実
施例を示す断面図、第２図は第１図における本考
案の要部の拡大図、第３図は本考案に従つた負圧
式倍力装置の入力荷重と出力荷重との関係を示す
特性図である。
１０……負圧式倍力装置、１１……ボデイ、１
４……パワーピストン、１５……ダイアフラム、
１６……定圧室、１７……変圧室、１８……ピス
トンボデイ、１８ａ……筒状部、１８ｂ……シー
ト面、１９……プレツシヤプレート、２０……プ
ツシユロツド、２１……バルブプランジヤ、２１
ａ……シート、２２……コントロールバルブ、２
２ａ……シール面、２２ｂ……ローリング部、２
２ｂ１……筒部、２２ｂ２……フランジ部、２３
……制御弁、２９ａ……第１コイルスプリング（
第１付勢手段）、２９ｂ……第１コイルスプリン
グ（第２付勢手段）、３０……スプリング、３１
……リテーナ。
Fig. 1 is a sectional view showing an embodiment of the negative pressure booster according to the present invention, Fig. 2 is an enlarged view of the main part of the present invention in Fig. 1, and Fig. 3 is a cross-sectional view showing an embodiment of the negative pressure booster according to the present invention. It is a characteristic diagram which shows the relationship between the input load and output load of a pressure type booster. 10... Negative pressure booster, 11... Body, 1
4...Power piston, 15...Diaphragm,
16... Constant pressure chamber, 17... Variable pressure chamber, 18... Piston body, 18a... Cylindrical part, 18b... Seat surface, 19... Pressure plate, 20... Push rod, 21... Valve plunger, 21
a... Seat, 22... Control valve, 2
2a... Seal surface, 22b... Rolling part, 2
2b1...Cylinder part, 22b2...Flange part, 23
...Control valve, 29a...First coil spring (
(first biasing means), 29b...first coil spring (second biasing means), 30...spring, 31
...retainer.
Claims (1)
圧室とに区画するパワーピストン及びダイアフラ
ムと、該パワーピストンに摺動可能に嵌合されブ
レーキペダルにプツシユロツドを介して連動する
バルブプランジヤ及び、該バルブプランジヤの後
端に第１付勢手段により付勢されて通常時当接す
るシール面とその内外面に夫々大気と負圧が常時
作用し且つ前記プツシユロツドの軸方向の移動に
応じて軸方向に伸縮自在な筒部とフランジ部を備
えたローリング部を有し、前記パワーピストンの
筒状部に固定されて前記プツシユロツドを前記ブ
レーキペダル側に付勢する第２付勢手段を係止す
るリテーナによりその外周部を前記筒状部に気密
的に挾持されたコントロールバルブとから成る制
御弁を備え、該制御弁のコントロールバルブが前
記第１付勢手段により前記バルブプランジヤと共
にブレーキペダルに連動し、前記シール面が前記
パワーピストンのシート面に当接して前記定圧室
と前記変圧室の連通を遮断し、前記バルブプラン
ジヤの後端と前記コントロールバルブのシール面
が離間して前記変圧室内に大気を導入し前記両室
間に圧力差を生じさせ、前記パワーピストンに作
動力を発生させる負圧式倍力装置において、前記
リテーナの内周部を前記ローリング部のフランジ
部内面に沿わせて内方へ前記フランジ部の内周縁
部まで延在させて、前記フランジ部の内面に固定
させたことを特徴とする負圧式倍力装置。 A power piston and a diaphragm that divide the inside of the housing into a variable pressure chamber and a constant pressure chamber where negative pressure always acts, a valve plunger that is slidably fitted to the power piston and interlocks with a brake pedal via a push rod, and the valve. Atmospheric pressure and negative pressure are constantly applied to the sealing surface that normally contacts the rear end of the plunger by the first biasing means, and the inner and outer surfaces of the sealing surface, respectively, and expands and contracts in the axial direction in response to the axial movement of the push rod. It has a rolling part having a flexible cylindrical part and a flange part, and is fixed to the cylindrical part of the power piston by a retainer that locks a second biasing means that biases the push rod toward the brake pedal. and a control valve whose outer periphery is airtightly sandwiched between the cylindrical part, the control valve of the control valve is interlocked with the brake pedal together with the valve plunger by the first biasing means, and the control valve is interlocked with the brake pedal together with the valve plunger by the first biasing means, The surface contacts the seat surface of the power piston to cut off communication between the constant pressure chamber and the variable pressure chamber, and the rear end of the valve plunger and the sealing surface of the control valve are separated to introduce atmospheric air into the variable pressure chamber. In the negative pressure booster that generates a pressure difference between the two chambers and generates an operating force in the power piston, the inner peripheral part of the retainer is aligned with the inner surface of the flange part of the rolling part and the flange is moved inwardly. A negative pressure booster, characterized in that the device extends to the inner peripheral edge of the flange portion and is fixed to the inner surface of the flange portion.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734289U JPH0299061U (en) | 1989-01-25 | 1989-01-25 | |
| GB9001772A GB2230575B (en) | 1989-01-25 | 1990-01-25 | Vacuum brake booster |
| US07/841,779 US5190125A (en) | 1989-01-25 | 1992-03-02 | Vacuum brake booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734289U JPH0299061U (en) | 1989-01-25 | 1989-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0299061U true JPH0299061U (en) | 1990-08-07 |
Family
ID=31212275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP734289U Pending JPH0299061U (en) | 1989-01-25 | 1989-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0299061U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19519235A1 (en) * | 1994-05-25 | 1995-12-07 | Toyota Motor Co Ltd | Vacuum servo unit for vehicle braking system |
| DE19620200A1 (en) * | 1995-05-18 | 1996-12-12 | Aisin Seiki | Vacuum brake assister for vehicle |
-
1989
- 1989-01-25 JP JP734289U patent/JPH0299061U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19519235A1 (en) * | 1994-05-25 | 1995-12-07 | Toyota Motor Co Ltd | Vacuum servo unit for vehicle braking system |
| DE19519235B4 (en) * | 1994-05-25 | 2004-11-25 | Toyota Jidosha K.K., Toyota | Vacuum servo unit for a vehicle brake system |
| DE19620200A1 (en) * | 1995-05-18 | 1996-12-12 | Aisin Seiki | Vacuum brake assister for vehicle |
| DE19620200B4 (en) * | 1995-05-18 | 2007-05-31 | Aisin Seiki K.K., Kariya | Vacuum brake booster for a motor vehicle |
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