JPS5614607A - Hydraulic circuit for hydraulic shovel - Google Patents
Hydraulic circuit for hydraulic shovelInfo
- Publication number
- JPS5614607A JPS5614607A JP8811179A JP8811179A JPS5614607A JP S5614607 A JPS5614607 A JP S5614607A JP 8811179 A JP8811179 A JP 8811179A JP 8811179 A JP8811179 A JP 8811179A JP S5614607 A JPS5614607 A JP S5614607A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- change
- line
- over valve
- turning motor
- 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
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To achieve an effective utilization of the energy of a motor, by branching the output line of the third pump and communicating the thusformed branch line with a change-over valve of an arm through a throttle valve.
CONSTITUTION: An output line C of the third pump 3 is branched into lines (h) and (i). The line (h) is led to a change-over valve 31 for a turning motor while the line (i) is communicated with a change-over valve 22 for an arm through a throttle valve E. When the turning motor and arm are simultanenously operated, a flow of pressure oil required for the actuation and acceleration of the turning motor is supplied to the turning motor through the line (h) and change-over valve 31 and remaining pressure oil is fed to an arm hydraulic cylinder via the throttle vavle E and change-over valve 22 of the arm. Thus, the turning motor is driven with priority by the pressure oil from the third pump 3 and, at the same time, the actuation speed of the hydraulic cylinder for the arm can be accelerated, resulting in an effective utilization of the energy of the motor.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8811179A JPS5614607A (en) | 1979-07-13 | 1979-07-13 | Hydraulic circuit for hydraulic shovel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8811179A JPS5614607A (en) | 1979-07-13 | 1979-07-13 | Hydraulic circuit for hydraulic shovel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5614607A true JPS5614607A (en) | 1981-02-12 |
Family
ID=13933765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8811179A Pending JPS5614607A (en) | 1979-07-13 | 1979-07-13 | Hydraulic circuit for hydraulic shovel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5614607A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57184137A (en) * | 1981-05-06 | 1982-11-12 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for oil-pressure working machine |
JPS57184136A (en) * | 1981-05-06 | 1982-11-12 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for oil-pressure working machine |
WO1998012391A1 (en) * | 1996-09-19 | 1998-03-26 | Yanmar Diesel Engine Co., Ltd. | Hydraulic circuit for turning excavator |
JP2013148175A (en) * | 2012-01-20 | 2013-08-01 | Kobelco Contstruction Machinery Ltd | Hydraulic circuit of construction machine |
JP2015148300A (en) * | 2014-02-07 | 2015-08-20 | ナブテスコ株式会社 | Hydraulic drive device |
-
1979
- 1979-07-13 JP JP8811179A patent/JPS5614607A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57184137A (en) * | 1981-05-06 | 1982-11-12 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for oil-pressure working machine |
JPS57184136A (en) * | 1981-05-06 | 1982-11-12 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for oil-pressure working machine |
JPH0128177B2 (en) * | 1981-05-06 | 1989-06-01 | Hitachi Construction Machinery | |
WO1998012391A1 (en) * | 1996-09-19 | 1998-03-26 | Yanmar Diesel Engine Co., Ltd. | Hydraulic circuit for turning excavator |
JP2013148175A (en) * | 2012-01-20 | 2013-08-01 | Kobelco Contstruction Machinery Ltd | Hydraulic circuit of construction machine |
JP2015148300A (en) * | 2014-02-07 | 2015-08-20 | ナブテスコ株式会社 | Hydraulic drive device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57144344A (en) | Flushing valve | |
JPS5614607A (en) | Hydraulic circuit for hydraulic shovel | |
JPS57205637A (en) | Oil-pressure circuit for travelling of construction machine | |
JPS57184137A (en) | Oil-pressure circuit for oil-pressure working machine | |
JPS5614606A (en) | Hydraulic circuit for hydraulic shovel | |
JPS5614605A (en) | Hydraulic driving method and system for actuator | |
JPS566832A (en) | Hydraulic circuit for hydraulic shovel | |
JPS57201434A (en) | Oil-pressure circuit for hydraulic shovel | |
JPS5768543A (en) | Control device for engine | |
JPS5543270A (en) | Hydraulic piston pump | |
JPS56167903A (en) | Hydraulic circuit of brake for hydraulic motor | |
JPS55136620A (en) | Truck crane | |
JPS5532817A (en) | Hydraulic circuit for hydraulic shovel | |
JPS56159584A (en) | Oil pressure control circuit for construction machine | |
JPS5578846A (en) | Control device of automatic change gear | |
JPS5599421A (en) | Operating device for controlling running of power excavator | |
JPS5561621A (en) | Hydraulic circuit of hydraulic shovel | |
JPS5620803A (en) | Hydraulic circuit | |
JPS5754704A (en) | Hydraulic circuit | |
JPS5569351A (en) | Transmission hydraulic control device for industrial vehicle | |
JPS5586907A (en) | Three-pump hydraulic circuit for construction machinery or the like | |
JPS5751577A (en) | Power steering device | |
JPS5497803A (en) | Volumetric hydraulic machine | |
JPS5695753A (en) | Auxiliary brake device for industrial vehicle | |
JPS54160977A (en) | Functioning speed changing method by means of operating lever |