JPH0425078U

JPH0425078U -

Info

Publication number: JPH0425078U
Application number: JP6760790U
Authority: JP
Priority date: 1990-06-26
Filing date: 1990-06-26
Publication date: 1992-02-28
Anticipated expiration: 2005-06-26
Also published as: JP2503229Y2

Description

[Brief explanation of drawings]

第１図は本考案の実施例によるクロスオーバリ
リーフ弁を示す縦断面図、第２図ないし第４図は
従来技術に係り、第２図はクロスオーバリリーフ
弁が適用される油圧回路図、第３図は従来技術に
よるクロスオーバリリーフ弁を示す縦断面図、第
４図はピストンが変位した状態を示す第３図と同
様の縦断面図である。９，１０……クロスオーバリリーフ弁（圧力制
御弁）、１１……弁本体、１１Ａ……主弁体摺動
穴、１２……ばね室、１３……弁座部材（主弁座
）、１５……ガイド部材、１５Ａ……小径筒部、
１６……主弁体、１７……圧力設定用ばね、１８
……副弁体、１９……第１の圧力室、２０……ピ
ストン、２１……第２の圧力室、２４……第１の
絞り油路、２５……第２の絞り油路、２７……ド
レン油路、３１……閉弁助力用ばね、３２……縮
径部。 FIG. 1 is a vertical sectional view showing a crossover relief valve according to an embodiment of the present invention, FIGS. 2 to 4 are related to the prior art, and FIG. 2 is a hydraulic circuit diagram to which the crossover relief valve is applied. FIG. 3 is a longitudinal sectional view showing a conventional crossover relief valve, and FIG. 4 is a longitudinal sectional view similar to FIG. 3 showing a state in which the piston is displaced. 9, 10... Crossover relief valve (pressure control valve), 11... Valve body, 11A... Main valve body sliding hole, 12... Spring chamber, 13... Valve seat member (main valve seat), 15 ...Guide member, 15A...Small diameter cylinder part,
16... Main valve body, 17... Pressure setting spring, 18
...Sub-valve body, 19...First pressure chamber, 20...Piston, 21...Second pressure chamber, 24...First throttle oil passage, 25...Second throttle oil passage, 27 ... Drain oil path, 31 ... Valve closing assisting spring, 32 ... Diameter reduction part.

Claims

[Scope of utility model registration request]

A valve body consisting of a cylindrical body, with a main valve seat on one side and a splash chamber on the other side across the main valve body sliding hole formed in the axially intermediate portion, and a main valve body sliding portion of the valve body. a main valve body slidably inserted into the hole; a pressure setting spring disposed within a spring chamber of the valve body and urging the main valve body to seat on the main valve seat; a cylindrical guide member provided on the spring chamber side of the valve body; and a cylindrical guide member provided on the spring chamber side of the valve body so as to be seated apart from the main valve body, one side of which defines a first pressure chamber within the main valve body. a sub-valve body, the other side of which defines a second pressure chamber having a larger pressure-receiving area than the first pressure chamber; and the sub-valve body; a piston located within the second pressure chamber and slidably provided on the guide member; and a primary side pressure acting on the main valve body. a first throttle oil passage bored in the main valve body so as to guide the pressure in the first pressure chamber to a second pressure chamber; a second throttle oil passage bored in the body and having a smaller flow area than the first throttle oil passage;
In order to communicate the spring chamber of the valve body with the secondary side,
In the pressure control valve equipped with a drain oil passage bored in the valve body, a space between the guide member and the sub-valve body is biased so that the sub-valve body is seated toward the main valve body. A pressure control valve characterized by being provided with a spring for assisting valve closing.