JPH0227207U

JPH0227207U -

Info

Publication number: JPH0227207U
Application number: JP10376688U
Authority: JP
Priority date: 1988-08-05
Filing date: 1988-08-05
Publication date: 1990-02-22

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例の縦断正面図、第
２図は第１実施例におけるハンドルの回転数と二
次圧の関係を示す線図、第３図は第２実施例の縦
断正面図、第４図Ａ〜Ｃは本考案の他の実施例に
おける調圧ばねの縦断面図、第５図及び第６図は
第４図Ａ〜Ｃに示す他の実施例、及び周知の減圧
弁におけるハンドルの回転数と二次圧の関係を示
す線図である。１０，４０……減圧弁、１１……弁部、１２，
４１……調圧部、１５……供給弁座、１７……供
給弁体、２２……ダイヤフラム、２３……フイー
ドバツク室、２８……排出弁座、３０……排出弁
体、３３……調圧ねじ、３６，３７，４５ａ〜４
５ｃ……調圧ばね、Ｐ……供給ポート、Ａ……出
力ポート、Ｒ……リリーフポート。 Fig. 1 is a longitudinal sectional front view of the first embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the rotation speed of the handle and the secondary pressure in the first embodiment, and Fig. 3 is a longitudinal sectional view of the second embodiment. 4A to 4C are longitudinal cross-sectional views of the pressure regulating spring in other embodiments of the present invention, and FIGS. 5 and 6 show other embodiments shown in FIGS. 4A to C and well-known FIG. 3 is a diagram showing the relationship between the number of rotations of a handle and secondary pressure in a pressure reducing valve. 10, 40... pressure reducing valve, 11... valve part, 12,
41... Pressure regulation part, 15... Supply valve seat, 17... Supply valve body, 22... Diaphragm, 23... Feedback chamber, 28... Discharge valve seat, 30... Discharge valve body, 33... Adjustment Pressure screw, 36, 37, 45a~4
5c...Pressure adjustment spring, P...Supply port, A...Output port, R...Relief port.

Claims

[Claims for Utility Model Registration] 1. A pressure fluid supply port, an output port, a relief port, a supply valve seat and a discharge valve seat in a passage that communicates these ports, and a supply valve body that opens and closes these valve seats. A pressure regulating section having a valve part having a discharge valve body, a displaceable pressure regulating member that drives the valve body, a pressure regulating spring that expands and contracts as a pressure regulating screw advances and retreats, and a feedback chamber to which fluid from an output port is fed back. In the pressure reducing valve, which reduces the fluid pressure in the supply port by displacing the pressure regulating member depending on the magnitude of the biasing force of the pressure regulating spring and the acting force of the fluid in the feedback chamber, the pressure regulating spring has a weak biasing force. A pressure reducing valve characterized by being composed of a spring and a spring with a strong biasing force. 2. Claim 1, characterized in that the pressure regulating spring is constituted by a coil spring whose spring constant increases or decreases as it expands and contracts.
Pressure reducing valve described in .