JPH03118370U

JPH03118370U -

Info

Publication number: JPH03118370U
Application number: JP2690790U
Authority: JP
Priority date: 1990-03-16
Filing date: 1990-03-16
Publication date: 1991-12-06
Anticipated expiration: 2003-09-07
Also published as: JPH0535254Y2

Description

[Brief explanation of drawings]

第１図は本考案の実施例圧力補償弁を示す油圧
回路図、第２図は第１図に示す圧力補償を使用し
た落下防止を必要とするノンリーク油圧回路図、
第３図は第２図に対応する従来の油圧回路図、第
４図及び第５図は従来の圧力補償弁を示す油圧回
路図である。５……電磁比例方向流量制御弁（可変絞り弁）
、６……圧力補償弁、１０……本体、１１……ス
プリング、１２……スプール、１４′……入口ポ
ート、１６′……出口ポート、２０……シート斜
面、２１……第１のランド、２２……第２のラン
ド、２３……第１油室、２４……穴、２５……第
２油室、２６……第３油室、２７……内周エツジ
、２８……内側エツジ、２９……小径部。 Fig. 1 is a hydraulic circuit diagram showing a pressure compensation valve according to an embodiment of the present invention, Fig. 2 is a non-leak hydraulic circuit diagram that requires drop prevention using the pressure compensation shown in Fig. 1;
FIG. 3 is a conventional hydraulic circuit diagram corresponding to FIG. 2, and FIGS. 4 and 5 are hydraulic circuit diagrams showing conventional pressure compensating valves. 5...Solenoid proportional directional flow control valve (variable throttle valve)
, 6...Pressure compensation valve, 10...Main body, 11...Spring, 12...Spool, 14'...Inlet port, 16'...Outlet port, 20...Seat slope, 21...First land , 22... Second land, 23... First oil chamber, 24... Hole, 25... Second oil chamber, 26... Third oil chamber, 27... Inner peripheral edge, 28... Inner edge , 29...small diameter section.

Claims

[Claims for Utility Model Registration] (1) A main body, a spool having first and second lands slidably inserted into a hole provided in the main body in the axial direction, and an inflow side of a variable throttle valve. a first oil chamber that communicates with the outer end surface of the first land; a second oil chamber that communicates with the outflow side of the throttle valve and that is provided on the outer end surface of the second land;
an outlet port provided in the main body to communicate a third oil chamber formed between each land with the inflow side; a spring inserted into the second oil chamber to press the spool inward; an inlet port having an inner circumferential edge that cooperates with an inner end surface edge of the first land, wherein a small diameter portion having an inner peripheral edge is provided outwardly of the second oil chamber; A pressure compensating valve characterized in that a seat slope is provided on the outer periphery of the land so that it can come into contact with the inner edge. (2) a spool having a main body, first and second lands slidably inserted into a hole provided in the main body in the axial direction, and the first land communicating with the inflow side of the variable throttle valve; a first oil chamber provided on the outer end surface of the second land, and a second oil chamber communicated with the outflow side of the throttle valve and provided on the outer end surface of the second land;
an outlet port provided in the main body to communicate a third oil chamber formed between each land with the inflow side; a spring inserted into the second oil chamber to press the spool inward; an inlet port having an inner circumferential edge cooperating with a first land inner end surface edge; A pressure compensating valve characterized in that a slope is provided so that it can come into contact with an annular step provided in correspondence with the hole of the main body.