JPH0337064U

JPH0337064U -

Info

Publication number: JPH0337064U
Application number: JP9822089U
Authority: JP
Priority date: 1989-08-23
Filing date: 1989-08-23
Publication date: 1991-04-10
Anticipated expiration: 2004-03-09
Also published as: JPH068956Y2

Description

[Brief explanation of the drawing]

第１図〜第３図は本考案の一実施例を示すもの
であつて、第１図はブレーキ液圧制御弁の全体断
面図、第２図は閉状態にあるバルブの断面図、第
３図はバルブが傾動する原理を表わす概念図、第
４図は従来のブレーキ液圧制御弁の一部を示す断
面図、第５図はブレーキ液圧制御弁における入力
圧と出力圧との関係を示す特性線図である。１……ブレーキ液圧制御弁、２，１４……ブレ
ーキ液通路、３……ハウジング、４……ケーシン
グ、７……段付プランジヤ、７ａ……大径部、７
ｂ……小径部、８，９……シール部材、１０……
戻しばね、１１……室、１２……キヤツプ状部材
、１２ａ……孔、１３……連通路、１５……バル
ブ、１６……圧縮ばね、１７……バルブシート、
１８……軸部、１９……拡径部、２０……傾斜面
。 1 to 3 show one embodiment of the present invention, in which FIG. 1 is an overall cross-sectional view of a brake fluid pressure control valve, FIG. 2 is a cross-sectional view of the valve in a closed state, and FIG. The figure is a conceptual diagram showing the principle of tilting of the valve, Figure 4 is a sectional view showing part of a conventional brake fluid pressure control valve, and Figure 5 shows the relationship between input pressure and output pressure in the brake fluid pressure control valve. FIG. DESCRIPTION OF SYMBOLS 1... Brake fluid pressure control valve, 2, 14... Brake fluid passage, 3... Housing, 4... Casing, 7... Stepped plunger, 7a... Large diameter portion, 7
b... Small diameter portion, 8, 9... Seal member, 10...
Return spring, 11... Chamber, 12... Cap-shaped member, 12a... Hole, 13... Communication path, 15... Valve, 16... Compression spring, 17... Valve seat,
18... Shaft portion, 19... Expanded diameter portion, 20... Inclined surface.

Claims

[Scope of utility model registration request]

A stepped piston having a large diameter portion and a small diameter portion is slidably fitted into a casing attached to the master cylinder housing, and this stepped piston is normally held in a non-operating position by biasing it in one direction. In addition, brake fluid pressure is applied to the small diameter portion at one end of the stepped piston and the large diameter portion at the other end, and the stepped piston is displaced from the non-operating position in a direction opposite to the urging direction by the difference in pressure receiving area. Meanwhile, a communication passage is formed in the stepped piston to communicate the brake fluid passage on the small diameter side of the stepped piston with the brake fluid passage on the large diameter side, and a valve is disposed in the communication passage. , a brake fluid pressure control valve that maintains the valve in an open state when the stepped piston is not activated and opens and closes the valve when the stepped piston is activated; In addition to forming a diameter portion, an inclined surface is provided on the end surface of the shaft portion of the valve located on the valve seat side of the stepped piston, and is inclined in the radial direction from the outer circumference side end toward the enlarged diameter portion side, so that the valve can be opened and closed. 1. A brake fluid pressure control valve characterized in that one side outer wall surface of said enlarged diameter portion is brought into contact with an inner wall surface of said stepped piston by tilting said valve.