JPS6422670U

JPS6422670U -

Info

Publication number: JPS6422670U
Application number: JP11895287U
Authority: JP
Priority date: 1987-08-03
Filing date: 1987-08-03
Publication date: 1989-02-06
Also published as: JPH0353951Y2

Description

[Brief explanation of the drawing]

第１図及び第２図は本考案の第１実施例を示す
もので、第１図はセンタバルブ型液圧マスタシリ
ンダの非作動時の要部拡大断面図、第２図は同じ
く断面正面図、第３図は第２実施例を示す非作動
状態の液圧マスタシリンダの要部拡大断面図であ
る。１……センタバルブ型の液圧マスタシリンダ、
２……シリンダボデイ、３……シリンダ孔、３ａ
……ボス部、３ｂ……端面、４……プツシユロツ
ド、５……ピストン、６……リザーバ、８……液
圧室、９……突出口、１０……連通孔、１０ａ…
…縦孔、１２……バルブステム、１２ｂ……大径
軸部、１２ｃ……弁体、１３……リテーナ、１４
……スプリングリテーナ、１４ａ……筒部、１４
ｂ……底板、１４ｃ……フランジ、１４ｄ……折
返し部、１５……通孔、１６……バルブシール、
１６ａ……ベース部、１６ｂ……弁座、１６ｃ…
…リング部、１６ｄ……座面、１７……芯金、１
８……リターンスプリング、ｌ_１……弁座１６ｂ
の潰れ代、ｌ_２……無効ストローク、ｌ_３……潰
れ代ｌ_１と無効ストロークｌ_２とを加えた長さ、
２０……バルブガイド、２１……取付け穴、２２
……バルブシール、２２ａ……ベース部、２２ｂ
……弁座、２２ｃ……空間部。 1 and 2 show a first embodiment of the present invention, in which FIG. 1 is an enlarged sectional view of the main part of a center valve type hydraulic master cylinder when it is not in operation, and FIG. 2 is a sectional front view of the same. , and FIG. 3 is an enlarged sectional view of a main part of a hydraulic master cylinder in a non-operating state, showing a second embodiment. 1...Center valve type hydraulic master cylinder,
2...Cylinder body, 3...Cylinder hole, 3a
...Boss portion, 3b...End face, 4...Push rod, 5...Piston, 6...Reservoir, 8...Hydraulic pressure chamber, 9...Protrusion port, 10...Communication hole, 10a...
... Vertical hole, 12 ... Valve stem, 12b ... Large diameter shaft section, 12c ... Valve body, 13 ... Retainer, 14
... Spring retainer, 14a ... Cylindrical portion, 14
b... Bottom plate, 14c... Flange, 14d... Turned part, 15... Through hole, 16... Valve seal,
16a...base part, 16b...valve seat, 16c...
...Ring part, 16d...Seat surface, 17...Core metal, 1
8... Return spring, l ₁ ... Valve seat 16b
Collapse allowance, l ₂ ... Invalid stroke, l ₃ ... Length of sum of collapse allowance l ₁ and invalid stroke l ₂ ,
20...Valve guide, 21...Mounting hole, 22
... Valve seal, 22a ... Base part, 22b
...Valve seat, 22c...Space part.

Claims

[Scope of utility model registration request]

A piston that slides through the cylinder hole of the cylinder body supports a valve stem that protrudes into the hydraulic pressure chamber at the bottom of the cylinder hole, and the tip of the valve stem closes the communication hole that communicates the hydraulic pressure chamber and the reservoir. In the valve-type hydraulic master cylinder, an annular valve seal is fixed to the outer periphery of a communication hole opening in the bottom wall of the cylinder hole, and a valve body that contacts the valve seal is attached to the tip of the valve stem facing the valve seal. A center valve type hydraulic master cylinder characterized by being provided with.