JPS5939259U

JPS5939259U - brake booster

Info

Publication number: JPS5939259U
Application number: JP13607982U
Authority: JP
Inventors: 金子　久教
Original assignee: トヨタ自動車株式会社
Priority date: 1982-09-08
Filing date: 1982-09-08
Publication date: 1984-03-13

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例であるブレーキブースタの
斜視図である。第２図は、第１図の一部を切欠いた要部
断面図である。第３図は、第２図のリアクションレバ一
部分の拡大図である。第４図は、第３図のリアクション
レバーの斜視図である。゛第５図及び第６図は、第１図
の実施例の作動を説明するための説明図である。第７図
は、ブースタ出力とブレーキペダル踏力との関係を示す
図表である。第８図乃至第１２図は本考案の他の実施例
を示し、第８図乃至第１１図はそれぞれ第４図に相当し
、第１２図は第３図に相当する図である。１０：第１シエル（シェル）、１２：第２シエル（シェ
ル）、１４：パワーピストン、１６：低王室、１８：高
圧室、２４：伝達部材、４０：出力部材、４４、　５０
：Ｌ／バー支持部、４６：リアクシヨンレバー、５６．
　７４：接触部、７２：ゴム製突起（レバー支持部）。FIG. 1 is a perspective view of a brake booster that is an embodiment of the present invention. FIG. 2 is a sectional view of a main part of FIG. 1, with a part thereof cut away. FIG. 3 is an enlarged view of a portion of the reaction lever in FIG. 2. FIG. 4 is a perspective view of the reaction lever of FIG. 3. 5 and 6 are explanatory diagrams for explaining the operation of the embodiment shown in FIG. 1. FIG. 7 is a chart showing the relationship between booster output and brake pedal depression force. 8 to 12 show other embodiments of the present invention, in which FIGS. 8 to 11 correspond to FIG. 4, and FIG. 12 corresponds to FIG. 3. 10: First shell (shell), 12: Second shell (shell), 14: Power piston, 16: Low royal chamber, 18: High pressure chamber, 24: Transmission member, 40: Output member, 44, 50
: L/bar support part, 46: Reaction lever, 56.
74: Contact portion, 72: Rubber protrusion (lever support portion).

Claims

[Claims for Utility Model Registration] The airtight chamber formed within the shell is divided into a low pressure chamber and a high pressure chamber.
A power piston is disposed in a separate manner and is actuated by the pressure difference between the low pressure chamber and the high pressure chamber, and the power piston is fitted to the power piston so as to be movable relative to the power piston, and transmits brake operation input. an output member that is movable in the axial direction facing the power piston and the transmission member; and an output member supported by the power piston and the transmission member at both ends and at an intermediate portion. and a reaction lever supported from the opposite direction, and the actuation force transmitted from the power piston to the output member is boosted according to a lever ratio determined by the distance between the support positions of the reaction lever. The reaction lever is made elastically deformable, or the power piston and/or the lever support portion of the output member that supports the reaction lever is made elastically deformable, and the power piston and/or the output member near the lever support portion is made elastically deformable. , a contact portion that contacts the reaction lever and reduces the interval between supporting positions of the reaction lever by the power piston and the output member when the reaction lever or the lever support portion is elastically deformed by a reaction force applied from the output member; A brake booster characterized in that the servo ratio to the brake operation input of the power piston is increased when the reaction force from the output member is small (or increased by a certain amount).