JPS57133941A - Oil-pressure circuit for oil-pressure type excavator - Google Patents

Oil-pressure circuit for oil-pressure type excavator

Info

Publication number
JPS57133941A
JPS57133941A JP1892881A JP1892881A JPS57133941A JP S57133941 A JPS57133941 A JP S57133941A JP 1892881 A JP1892881 A JP 1892881A JP 1892881 A JP1892881 A JP 1892881A JP S57133941 A JPS57133941 A JP S57133941A
Authority
JP
Japan
Prior art keywords
oil
pressure
circuit
capacity pump
running
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
JP1892881A
Other languages
Japanese (ja)
Inventor
Yutaka Yoshinada
Hiroshi Oshima
Takashi Ono
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP1892881A priority Critical patent/JPS57133941A/en
Publication of JPS57133941A publication Critical patent/JPS57133941A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices

Abstract

PURPOSE:To reduce the number of variable capacity pumps by forming an opened oil-pressure circuit by a bucket and a stationary capacity pump, another closed oil-pressure circuit including variable capacity pump by a boom, a motor for left-side running, an arm, and a motor for right-side running, and another oil-pressure circuit by a motor for turning. CONSTITUTION:Considering that an oil-pressure type excavator does not run when heavy load is being applied to working machine, an oil-pressure open circuit is made up connecting one of a boom cylinder 11, an arm cylinder 12, and a bucket cylinder 13, through a switch valve 22, with a stationary capacity pump 23. And, an oil-pressure close circuit is made up by connecting one of the remaining motors 5L with a common variable capacity pump 2'. Also, an oil- pressure cylinders, a boom cylinder 11, and any one of left- and right-handed running close circuit is made up by connecting the other remaining cylinder 12 and the rest 5R of the running motors with a common variable capacity pump 2<2>. Taking concurrnt operability and operating pattern into consideration, for a running motor 30, oil-pressure circuit is made up independently of the other oil-pressure apparatus.
JP1892881A 1981-02-13 1981-02-13 Oil-pressure circuit for oil-pressure type excavator Pending JPS57133941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1892881A JPS57133941A (en) 1981-02-13 1981-02-13 Oil-pressure circuit for oil-pressure type excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1892881A JPS57133941A (en) 1981-02-13 1981-02-13 Oil-pressure circuit for oil-pressure type excavator

Publications (1)

Publication Number Publication Date
JPS57133941A true JPS57133941A (en) 1982-08-18

Family

ID=11985286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1892881A Pending JPS57133941A (en) 1981-02-13 1981-02-13 Oil-pressure circuit for oil-pressure type excavator

Country Status (1)

Country Link
JP (1) JPS57133941A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929489A (en) * 2009-06-26 2010-12-29 安钛医疗设备股份有限公司 Two-way oil hydraulic system of operating table
US20130098018A1 (en) * 2011-10-21 2013-04-25 Michael L. Knussman Hydraulic system
WO2013059386A1 (en) * 2011-10-21 2013-04-25 Caterpillar Inc. Hydraulic system having multiple closed-loop circuits
WO2013059250A1 (en) * 2011-10-21 2013-04-25 Caterpillar Inc. Hydraulic system
US20130098459A1 (en) * 2011-10-21 2013-04-25 Patrick Opdenbosch Closed-Loop Hydraulic System Having Flow Combining and Recuperation
WO2014045672A1 (en) * 2012-09-20 2014-03-27 日立建機株式会社 Drive device for working machine and working machine provided with same
CN103998795A (en) * 2011-10-21 2014-08-20 卡特彼勒公司 Hydraulic system having multiple closed-loop circuits

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4529606Y1 (en) * 1966-09-05 1970-11-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4529606Y1 (en) * 1966-09-05 1970-11-13

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929489A (en) * 2009-06-26 2010-12-29 安钛医疗设备股份有限公司 Two-way oil hydraulic system of operating table
CN104011402A (en) * 2011-10-21 2014-08-27 卡特彼勒公司 Hydraulic system
CN104011405A (en) * 2011-10-21 2014-08-27 卡特彼勒公司 Hydraulic system having multiple closed-loop circuits
WO2013059250A1 (en) * 2011-10-21 2013-04-25 Caterpillar Inc. Hydraulic system
US20130098459A1 (en) * 2011-10-21 2013-04-25 Patrick Opdenbosch Closed-Loop Hydraulic System Having Flow Combining and Recuperation
WO2013059254A1 (en) * 2011-10-21 2013-04-25 Caterpillar Inc. Hydraulic system
US8943819B2 (en) 2011-10-21 2015-02-03 Caterpillar Inc. Hydraulic system
CN103998795A (en) * 2011-10-21 2014-08-20 卡特彼勒公司 Hydraulic system having multiple closed-loop circuits
WO2013059386A1 (en) * 2011-10-21 2013-04-25 Caterpillar Inc. Hydraulic system having multiple closed-loop circuits
US20130098018A1 (en) * 2011-10-21 2013-04-25 Michael L. Knussman Hydraulic system
CN104114879A (en) * 2011-10-21 2014-10-22 卡特彼勒公司 Closed-Loop Hydraulic System Having Flow Combining and Recuperation
US8910474B2 (en) 2011-10-21 2014-12-16 Caterpillar Inc. Hydraulic system
WO2014045672A1 (en) * 2012-09-20 2014-03-27 日立建機株式会社 Drive device for working machine and working machine provided with same
JPWO2014045672A1 (en) * 2012-09-20 2016-08-18 日立建機株式会社 Drive device for work machine and work machine provided with the same
US9845813B2 (en) 2012-09-20 2017-12-19 Hitachi Construction Machinery Co., Ltd. Driving device for work machine and work machine equipped therewith

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