JPH02108649U

JPH02108649U -

Info

Publication number: JPH02108649U
Application number: JP1696689U
Authority: JP
Priority date: 1989-02-16
Filing date: 1989-02-16
Publication date: 1990-08-29

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示した実施例断面
図；第２図はは従来技術の説明図である。１：シリンダボデイ、２：シリンダ穴、３，５
：ガイドブツシユ、８：プライマリピストン、９
，１７：カツプシール、１０ａ，１８ａ：Ｏリン
グ、１１，１９：液通路、１４，２１：リターン
ポート、１５，２２：リターンスプリング、１６
：セカンダリピストン、２４：キヤツプ、２５，
３４：タンク接続口、２６：スプリングリテーナ
、２７：プラグ、２８：ネジ穴、２９：ガイドブ
ツシユ挿着穴、３０：Ｏリング装着穴、３１：ピ
ストン摺動穴、３２：段部、３３：係止突起、３
５：ロツド、３６：ニツプル。 FIG. 1 is a sectional view of an embodiment of the present invention; FIG. 2 is an explanatory diagram of the prior art. 1: Cylinder body, 2: Cylinder hole, 3, 5
: Guide bush, 8: Primary piston, 9
, 17: Cup seal, 10a, 18a: O ring, 11, 19: Liquid passage, 14, 21: Return port, 15, 22: Return spring, 16
:Secondary piston, 24:Cap, 25,
34: Tank connection port, 26: Spring retainer, 27: Plug, 28: Screw hole, 29: Guide bushing insertion hole, 30: O-ring installation hole, 31: Piston sliding hole, 32: Step, 33: Locking protrusion, 3
5: Rod, 36: Nipple.

Claims

[Claim for Utility Model Registration] Primary and secondary seal members are fixedly arranged in a cylinder hole in a cylinder body, and a primary piston and a secondary piston each having a return port are slidably incorporated into the seal members. In a master cylinder that generates two systems of hydraulic pressure, the diameter of the rear end of the secondary piston is expanded toward the outer circumferential side to form a locking protrusion, and a portion of the cylinder hole corresponding to the stop position of the secondary piston is provided. A piston stop positioning structure for a master cylinder, characterized in that a step portion is provided on which a locking protrusion of the secondary piston comes into contact.