JPH0167175U

JPH0167175U -

Info

Publication number: JPH0167175U
Application number: JP1987164211U
Authority: JP
Priority date: 1987-10-27
Filing date: 1987-10-27
Publication date: 1989-04-28

Description

[Brief explanation of drawings]

第１図及び第２図は本考案の一実施例を示し、
第１図は液圧マスタシリンダの断面正面図、第２
図は第１図の―断面図、第３図は他の実施例
を示す液圧マスタシリンダの要部断面正面図、第
４図及び第５図は更に他の実施例を示し、第４図
は液圧マスタシリンダの要部断面正面図、第５図
は第４図の―断面図である。１…液圧マスタシリンダ、２…シリンダボデイ
、３…シリンダ孔、４…プツシユロツド、５…ピ
ストン、６…液圧室、８…バルブ孔、９…連通孔
、９ａ……横孔、９ｂ…縦孔、１１…ガイド孔、
１２…バルブステム、１２ａ…頭部、１２ｂ…突
部、１２ｃ…大径フランジ、１２ｄ…小径フラン
ジ、１３…弁体、１４…リターンスプリング、１
５…ストツパ部材となる液圧室底部側のスプリン
グリテーナ、１６…ピストン側のスプリングリテ
ーナ、１７…弁ばね、１８，１９…連通路。 1 and 2 show an embodiment of the present invention,
Figure 1 is a cross-sectional front view of the hydraulic master cylinder;
The figure is a sectional view of FIG. 1, FIG. 3 is a sectional front view of the main part of a hydraulic master cylinder showing another embodiment, FIGS. 4 and 5 show still another embodiment, and FIG. 5 is a cross-sectional front view of the main part of the hydraulic master cylinder, and FIG. 5 is a cross-sectional view of FIG. 4. 1... Hydraulic pressure master cylinder, 2... Cylinder body, 3... Cylinder hole, 4... Push rod, 5... Piston, 6... Hydraulic pressure chamber, 8... Valve hole, 9... Communication hole, 9a... Horizontal hole, 9b... Vertical Hole, 11...Guide hole,
12...Valve stem, 12a...Head, 12b...Protrusion, 12c...Large diameter flange, 12d...Small diameter flange, 13...Valve body, 14...Return spring, 1
5... Spring retainer on the bottom side of the hydraulic pressure chamber serving as a stopper member, 16... Spring retainer on the piston side, 17... Valve spring, 18, 19... Communication passage.

Claims

[Scope of utility model registration request]

Loosely insert the rear end of the valve stem into the tip of the piston inserted into the cylinder hole, and when the piston moves forward,
In a center valve type vehicle hydraulic master cylinder in which a communication hole at the bottom of the hydraulic pressure chamber that communicates with the reservoir is closed by a valve body at the tip of the valve stem, there is a space between the hydraulic pressure chamber and the communication hole that has a diameter larger than that of the communication hole. A valve hole is provided that opens into the hydraulic pressure chamber, and the valve body is inserted into the valve hole, and a stopper member that comes into contact with the advancing piston to restrict the amount of movement of the piston is provided at the bottom of the cylinder hole. A center valve type vehicle hydraulic master cylinder characterized by being disposed so as to cover the edge of a hole.