JPH0296259U

JPH0296259U -

Info

Publication number: JPH0296259U
Application number: JP16096888U
Authority: JP
Priority date: 1988-12-12
Filing date: 1988-12-12
Publication date: 1990-07-31

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図は第１図のセカンダリ側のガイドブツ
シユ説明図；第３図は第１図のセカンダリ側のシ
リンダボデイ説明図；第４図は第１図のプライマ
リ側の支持キヤツプ説明図；第５図は従来技術の
説明図である。１：シリンダボデイ、２：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：プラグ、２５：フランジ部
、２６：キヤツプ、２７，３１：環状溝、２８：
連通路、２９，３２：タンク接続口、３０：ニツ
プル、３３：仕切壁、３４，３６：回止め嵌着部
、３５：段部、３７：嵌合突起、３８：ブツシユ
収納部、３９，４０：嵌合凹部。 Fig. 1 is a sectional view of an embodiment of the present invention; Fig. 2 is an explanatory view of the guide bush on the secondary side of Fig. 1; Fig. 3 is an explanatory view of the cylinder body on the secondary side of Fig. 1; FIG. 4 is an explanatory diagram of the support cap on the primary side of FIG. 1; FIG. 5 is an explanatory diagram of the prior art. 1: Cylinder body, 2: 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: Plug, 25: Flange portion, 26: Cap, 27, 31: Annular groove, 28:
Communication path, 29, 32: Tank connection port, 30: Nipple, 33: Partition wall, 34, 36: Rotating fitting part, 35: Step part, 37: Fitting protrusion, 38: Bush storage part, 39, 40 : Fitting recess.

Claims

[Claims for Utility Model Registration] A guide bushing having at least one liquid passage communicating between the inner circumferential surface and the outer circumferential surface is disposed in the cylinder hole of the cylinder body to support the sealing member of the piston. In a master cylinder having a structure in which a piston is provided in a slidable manner and a return port is provided in the piston, one end of the guide bush supporting the seal member is disposed in direct or indirect contact with the cylinder body; A fitting protrusion is provided on one of the guide bush and the guide bush contact member, and a fitting recess is provided on the other, and the liquid passage of the guide bush is connected to the upper tank communication passage by fitting the fitting protrusion and the fitting recess. A guide bush rotation prevention structure for a master cylinder, characterized in that the guide bush is prevented from rotating so as to open.