JP5368752B2 - 作業車両の油圧回路 - Google Patents
作業車両の油圧回路 Download PDFInfo
- Publication number
- JP5368752B2 JP5368752B2 JP2008225257A JP2008225257A JP5368752B2 JP 5368752 B2 JP5368752 B2 JP 5368752B2 JP 2008225257 A JP2008225257 A JP 2008225257A JP 2008225257 A JP2008225257 A JP 2008225257A JP 5368752 B2 JP5368752 B2 JP 5368752B2
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- lever
- mode switching
- pto
- port
- 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.)
- Expired - Fee Related
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 85
- 230000007246 mechanism Effects 0.000 claims description 51
- 239000012530 fluid Substances 0.000 claims description 13
- 239000003921 oil Substances 0.000 abstract description 123
- 239000003381 stabilizer Substances 0.000 description 15
- 230000002093 peripheral effect Effects 0.000 description 10
- 239000004576 sand Substances 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
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
-
- 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
- E02F9/2004—Control mechanisms, e.g. control levers
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
- F15B2211/31541—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and multiple output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/86131—Plural
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
6 エンジン
3 ローダ
4 バックホー
120 リザーバタンク(タンク)
150 バックホー用コントロールバルブ(他のコントロールバルブ)
200 ローダ用コントロールバルブ(コントロールバルブ)
230 モード切換弁
240 PTO用切換弁
260 PTO用ポート
261 PTO用ポート
344 カム部
364 カム部
380 リミットスイッチ(始動禁止手段)
400 インターロック機構
450 スロットルレバー制限機構(エンジン回転数制限手段)
460 スロットルレバー制限機構(エンジン回転数制限手段)
470 スロットルレバー制限機構(エンジン回転数制限手段)
Claims (7)
- 作動油を圧送する互いに独立した2つ以上の油圧ポンプと、前記2つ以上の油圧ポンプにより圧送される作動油を合流する合流ポジションに切り換え可能なモード切換弁と、作動油を取り出すPTO用ポートと、前記モード切換弁の下流側に配置され、作動油を前記PTO用ポートへ圧送可能に切り換えるPTO用切換弁とを具備する作業車両において、
前記モード切換弁は、前記合流ポジションと、前記2つ以上の油圧ポンプにより圧送される作動油をタンクへ戻す戻しポジションと、前記2つ以上の油圧ポンプにより圧送される作動油を合流することなく、それぞれ下流側に配置される他のコントロールバルブへと圧送する作業ポジションと、を切り換え可能に構成したことを特徴とする作業車両。 - 前記モード切換弁は、前記PTO用切換弁を具備するコントロールバルブに一体的に設けられる請求項1に記載の作業車両。
- 前記PTO用切換弁は、作動油を前記PTO用ポートへ圧送可能に切り換えられた状態で保持される連続ポジションを具備し、
前記PTO用切換弁が前記連続ポジションに切り換えられている場合にのみ、前記モード切換弁を前記合流ポジションに切り換え可能とするインターロック機構を具備する請求項1または請求項2に記載の作業車両。 - 前記インターロック機構は、前記PTO用切換弁が前記連続ポジションからその他のポジションへと切り換えられた場合、前記モード切換弁を前記合流ポジションからその他のポジションへと切り換える請求項3に記載の作業車両。
- 前記インターロック機構は、前記PTO用切換弁が前記連続ポジションからその他のポジションへと切り換えられる途中において、前記モード切換弁を、前記合流ポジション以外のポジションを所定寸法だけ超えたポジションまで移動させる請求項4に記載の作業車両。
- 前記PTO用切換弁が前記連続ポジションに切り換えられている場合において、エンジンの始動を禁止する始動禁止手段を具備する請求項3から請求項5までのいずれか一項に記載の作業車両。
- 前記モード切換弁が前記合流ポジションに切り換えられている場合において、エンジンの回転数を所定の回転数以下に制限するエンジン回転数制限手段を具備する請求項1から請求項6までのいずれか一項に記載の作業車両。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008225257A JP5368752B2 (ja) | 2008-09-02 | 2008-09-02 | 作業車両の油圧回路 |
US13/061,678 US8713931B2 (en) | 2008-09-02 | 2009-08-05 | Hydraulic circuit for working machine |
CA 2735253 CA2735253C (en) | 2008-09-02 | 2009-08-05 | Hydraulic circuit for working machine |
PCT/JP2009/063865 WO2010026848A1 (ja) | 2008-09-02 | 2009-08-05 | 作業車両の油圧回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008225257A JP5368752B2 (ja) | 2008-09-02 | 2008-09-02 | 作業車両の油圧回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010060027A JP2010060027A (ja) | 2010-03-18 |
JP5368752B2 true JP5368752B2 (ja) | 2013-12-18 |
Family
ID=41797020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008225257A Expired - Fee Related JP5368752B2 (ja) | 2008-09-02 | 2008-09-02 | 作業車両の油圧回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8713931B2 (ja) |
JP (1) | JP5368752B2 (ja) |
CA (1) | CA2735253C (ja) |
WO (1) | WO2010026848A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5106662B1 (ja) * | 2011-08-08 | 2012-12-26 | 株式会社小松製作所 | バックホーローダ |
CN104995412B (zh) * | 2013-03-22 | 2017-03-29 | 株式会社日立建机Tierra | 工程机械的液压驱动装置 |
CN107148380B (zh) * | 2014-10-29 | 2019-06-18 | 克拉克设备公司 | 用于控制动力机械的机械连接件 |
WO2016111205A1 (ja) * | 2015-01-06 | 2016-07-14 | 住友重機械工業株式会社 | 建設機械 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62178631A (ja) * | 1986-01-31 | 1987-08-05 | Yutani Juko Kk | 油圧シヨベルの特殊アタツチメント回路 |
US5083428A (en) * | 1988-06-17 | 1992-01-28 | Kabushiki Kaisha Kobe Seiko Sho | Fluid control system for power shovel |
DE10391576D2 (de) * | 2002-04-10 | 2005-03-03 | Luk Lamellen & Kupplungsbau | Hydrauliksystem, Automatikgetriebe |
JP4106011B2 (ja) | 2003-10-14 | 2008-06-25 | ナブテスコ株式会社 | 油圧回路及びその合流弁 |
JP2005351442A (ja) * | 2004-06-14 | 2005-12-22 | Hitachi Constr Mach Co Ltd | 建設機械のアタッチメント用流量切替弁装置 |
JP4262213B2 (ja) * | 2005-03-14 | 2009-05-13 | ヤンマー株式会社 | バックホーローダの油圧回路 |
JP2006329248A (ja) * | 2005-05-24 | 2006-12-07 | Kobelco Contstruction Machinery Ltd | 作業機械の油圧供給装置 |
JP3813164B2 (ja) * | 2005-10-11 | 2006-08-23 | 株式会社クボタ | バックホウの油圧装置 |
-
2008
- 2008-09-02 JP JP2008225257A patent/JP5368752B2/ja not_active Expired - Fee Related
-
2009
- 2009-08-05 CA CA 2735253 patent/CA2735253C/en not_active Expired - Fee Related
- 2009-08-05 US US13/061,678 patent/US8713931B2/en not_active Expired - Fee Related
- 2009-08-05 WO PCT/JP2009/063865 patent/WO2010026848A1/ja active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CA2735253C (en) | 2013-12-31 |
CA2735253A1 (en) | 2010-03-11 |
US8713931B2 (en) | 2014-05-06 |
JP2010060027A (ja) | 2010-03-18 |
WO2010026848A1 (ja) | 2010-03-11 |
US20120048409A9 (en) | 2012-03-01 |
US20110168283A1 (en) | 2011-07-14 |
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