JPS57133941A - Oil-pressure circuit for oil-pressure type excavator - Google Patents
Oil-pressure circuit for oil-pressure type excavatorInfo
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; 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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4529606Y1 (en) * | 1966-09-05 | 1970-11-13 |
-
1981
- 1981-02-13 JP JP1892881A patent/JPS57133941A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4529606Y1 (en) * | 1966-09-05 | 1970-11-13 |
Cited By (15)
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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