JPH03114601U - - Google Patents

Info

Publication number
JPH03114601U
JPH03114601U JP2236190U JP2236190U JPH03114601U JP H03114601 U JPH03114601 U JP H03114601U JP 2236190 U JP2236190 U JP 2236190U JP 2236190 U JP2236190 U JP 2236190U JP H03114601 U JPH03114601 U JP H03114601U
Authority
JP
Japan
Prior art keywords
pair
spool
valve body
neutral position
oil chambers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2236190U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP2236190U priority Critical patent/JPH03114601U/ja
Publication of JPH03114601U publication Critical patent/JPH03114601U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第１の実施例を示す流量制御
弁の縦断面図、第２図は本考案の第２の実施例を
示す流量制御弁の縦断面図、第３図は本考案の第
３の実施例を示す流量制御弁の縦断面図、第４図
および第５図は従来技術を示し、第４図は油圧回
路図、第５図は流量制御弁の縦断面図である。 １１……流量制御弁、１２……弁本体、１３Ａ
，１３Ｂ……油圧源側ポート、１４Ａ，１４Ｂ…
…アクチユエータ側ポート、１５……スプール摺
動穴、１６Ａ，１６Ｂ，１７Ａ，１７Ｂ……油溝
、１９Ａ，１９Ｂ……油室、２０……スプール、
２１，２２Ａ，２２Ｂ，２３Ａ，２３Ｂ……ラン
ド、２６Ａ，２６Ｂ……絞り通路、３１Ａ，３１
Ｂ，４３Ａ，４３Ｂ，５１Ａ，５１Ｂ……ストツ
パ、３３Ａ，３３Ｂ，４６Ａ，４６Ｂ，５５Ａ，
５５Ｂ……主ばね、３４Ａ，３４Ｂ，４７Ａ，４
７Ｂ，５６Ａ，５６Ｂ……補助ばね、５４Ａ，５
４Ｂ……ばね受。 Fig. 1 is a vertical sectional view of a flow control valve showing a first embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a flow control valve showing a second embodiment of the invention, and Fig. 3 is a longitudinal sectional view of a flow control valve showing a second embodiment of the invention. FIG. 4 and FIG. 5 show the prior art, FIG. 4 is a hydraulic circuit diagram, and FIG. 5 is a longitudinal cross-sectional view of the flow control valve showing the third embodiment of the present invention. . 11...Flow control valve, 12...Valve body, 13A
, 13B...Hydraulic power source side port, 14A, 14B...
... Actuator side port, 15 ... Spool sliding hole, 16A, 16B, 17A, 17B ... Oil groove, 19A, 19B ... Oil chamber, 20 ... Spool,
21, 22A, 22B, 23A, 23B... Land, 26A, 26B... Throttle passage, 31A, 31
B, 43A, 43B, 51A, 51B...stopper, 33A, 33B, 46A, 46B, 55A,
55B...Main spring, 34A, 34B, 47A, 4
7B, 56A, 56B...Auxiliary spring, 54A, 5
4B... Spring holder.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一対の油圧源側ポートと一対のアクチユエータ
側ポートとを有する弁本体と、該弁本体のスプー
ル摺動穴内に摺動可能に挿嵌され、前記各油圧源
側ポートと各アクチユエータ側ポートとの間を連
通、遮断するランドを有したスプールと、該スプ
ールの軸方向両端側に位置して、前記弁本体に設
けられた一対の油室と、該各油室を前記各油圧源
側ポートとそれぞれ連通させる一対の絞り通路と
からなる流量制御弁において、前記各油室内に設
けられ、前記スプールを常時中立位置に付勢する
一対の主ばねと、該各主ばねと共に各油室内に設
けられ、前記スプールが前記中立位置からスプー
ル摺動穴内を所定のストローク以上摺動したとき
に、該スプールを中立位置に向けて付勢する一対
の補助ばねを備えたことを特徴とする流量制御弁
。 A valve body having a pair of hydraulic power source side ports and a pair of actuator side ports, and a valve body that is slidably inserted into a spool sliding hole of the valve body, and between each of the hydraulic power source side ports and each actuator side port. a pair of oil chambers located on both ends of the spool in the axial direction and provided in the valve body; A flow control valve comprising a pair of throttle passages that communicate with each other, a pair of main springs provided in each of the oil chambers and always urging the spool to a neutral position, and a pair of main springs provided in each of the oil chambers together with each of the main springs, A flow control valve comprising a pair of auxiliary springs that bias the spool toward a neutral position when the spool slides from the neutral position in the spool sliding hole for a predetermined stroke or more.
JP2236190U 1990-03-06 1990-03-06 Pending JPH03114601U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2236190U JPH03114601U (en) 1990-03-06 1990-03-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2236190U JPH03114601U (en) 1990-03-06 1990-03-06

Publications (1)

Publication Number Publication Date
JPH03114601U true JPH03114601U (en) 1991-11-26

Family

ID=31525372

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2236190U Pending JPH03114601U (en) 1990-03-06 1990-03-06

Country Status (1)

Country Link
JP (1) JPH03114601U (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4927192U (en) * 1972-06-13 1974-03-08
JPS6018602A (en) * 1983-07-09 1985-01-30 Hitachi Constr Mach Co Ltd Brake valve
JPS62242102A (en) * 1986-04-14 1987-10-22 Nippon Air Brake Co Ltd Driving circuit for oil hydraulic motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4927192U (en) * 1972-06-13 1974-03-08
JPS6018602A (en) * 1983-07-09 1985-01-30 Hitachi Constr Mach Co Ltd Brake valve
JPS62242102A (en) * 1986-04-14 1987-10-22 Nippon Air Brake Co Ltd Driving circuit for oil hydraulic motor

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