JPH0281266U

JPH0281266U -

Info

Publication number: JPH0281266U
Application number: JP16096988U
Authority: JP
Priority date: 1988-12-12
Filing date: 1988-12-12
Publication date: 1990-06-22

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図は本考案のブースタ取付側端面図；第
３図は本考案のキヤツプ部材説明図；第４図は従
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、１１，１９，２６：液通路、１３，２０：タ
ンク接続口、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、２３：プラグ、２４：ロツド、２５：
キヤツプ部材、２５ａ：キヤツプ本体、２５ｂ：
アーム部、２７：ブースタ装着用フランジ、２８
：ボルト通し穴、２９：アーム部、３０：端面溝
、３１：通し溝、３２：通し穴、３３：嵌合片、
３５：負圧ブースタ、３６：ブースタシエル、３
７：シリンダ装着穴、３８：ニツプル、３９：仕
切壁。 Figure 1 is a sectional view of an embodiment of the present invention; Figure 2 is an end view of the booster installation side of the present invention; Figure 3 is an explanatory diagram of the cap member of the present invention; Figure 4 is a diagram of the prior art. It is an explanatory diagram. 1: Cylinder body, 2: Cylinder hole, 3, 5
: Guide bush, 8: Primary piston, 9
, 17: Cup seal, 10a, 18a: O-ring, 11, 19, 26: Liquid passage, 13, 20: Tank connection port, 14, 21: Return port, 15
, 22: Return spring, 16: Secondary piston, 23: Plug, 24: Rod, 25:
Cap member, 25a: Cap body, 25b:
Arm part, 27: Booster mounting flange, 28
: Bolt through hole, 29: Arm part, 30: End groove, 31: Through groove, 32: Through hole, 33: Fitting piece,
35: Negative pressure booster, 36: Booster shell, 3
7: Cylinder mounting hole, 38: Nipple, 39: Partition wall.

Claims

[Claims for Utility Model Registration] (1) Primary and secondary seal members are fixedly arranged in the cylinder hole in the cylinder body, and the primary piston and secondary piston, which are provided with return ports in the seal members, are slidably provided. In a master cylinder that is assembled to generate two systems of hydraulic pressure, and in which the primary side is fixedly supported by the cylinder body being assembled to the booster, the cylinder hole opening end face of the cylinder body that is the side where the primary piston is installed is , a guide bush on which the sealing member is disposed and a cap member for fixing the guide bush are provided, the cap member is temporarily attached to the booster mounting flange of the cylinder body in the master cylinder alone, and when the master cylinder is assembled to the booster, the flange is fixed. A structure of a master cylinder characterized in that a part of the cap member is held between the booster front shell and the seal member that receives hydraulic pressure and the guide bushing from falling out. (2) As the flange temporary attachment structure of the cap member, the outer peripheral surface of the flange is notched in the axial direction to form a through groove, and a fitting piece bent in a U-shape inward from the outer periphery of the cap is fitted into the through groove. 2. The structure of the master cylinder according to claim 1, wherein the master cylinder is engaged by turning.