JPS579305A - Oil pressure circuit - Google Patents

Oil pressure circuit

Info

Publication number
JPS579305A
JPS579305A JP8273380A JP8273380A JPS579305A JP S579305 A JPS579305 A JP S579305A JP 8273380 A JP8273380 A JP 8273380A JP 8273380 A JP8273380 A JP 8273380A JP S579305 A JPS579305 A JP S579305A
Authority
JP
Japan
Prior art keywords
actuator
oil pressure
throttle
discharge port
direction switch
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
JP8273380A
Other languages
Japanese (ja)
Inventor
Shuichi Ichiyama
Yasuhiko Murata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP8273380A priority Critical patent/JPS579305A/en
Publication of JPS579305A publication Critical patent/JPS579305A/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To prevent the over-run of anactuator during the extension as well as permit the acceleration of the speed of the actuator by improving an oil pressure circuit with a direction switch valve whose discharge port is varied with the driving direction of the actuator.
CONSTITUTION: In an oil pressure circuit in whch a direction switch vale 3 is provided between an oil pressure source 1 and an actuator 2, a throttle 14 is provided on the downstream side of the discharge port 5 of the direction switch valve 3, and the throttle 14 and the discharge port 5 are connected by a connection pipeline 15 on an incoming port 6 the discharge port 5. And, a check valve 16 through which oil can be flowed only toward the port 6 side from the throttle 14 side is provided to the connection pipeline 15. Thus, when extending the actuator 2 by switching the direction switch valve 3 to the position A, the over-run of the actuator 2 can be prevented owing to the passing of oil on the rod side of the actuator 2 through the throttle 14 even when the load in the direction C acts on the actuator 2.
COPYRIGHT: (C)1982,JPO&Japio
JP8273380A 1980-06-20 1980-06-20 Oil pressure circuit Pending JPS579305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8273380A JPS579305A (en) 1980-06-20 1980-06-20 Oil pressure circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8273380A JPS579305A (en) 1980-06-20 1980-06-20 Oil pressure circuit

Publications (1)

Publication Number Publication Date
JPS579305A true JPS579305A (en) 1982-01-18

Family

ID=13782612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8273380A Pending JPS579305A (en) 1980-06-20 1980-06-20 Oil pressure circuit

Country Status (1)

Country Link
JP (1) JPS579305A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142003A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Driving circuit of actuator with vacuum preventive mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142003A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Driving circuit of actuator with vacuum preventive mechanism

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