JP6964052B2 - 建設機械の油圧回路 - Google Patents
建設機械の油圧回路 Download PDFInfo
- Publication number
- JP6964052B2 JP6964052B2 JP2018151071A JP2018151071A JP6964052B2 JP 6964052 B2 JP6964052 B2 JP 6964052B2 JP 2018151071 A JP2018151071 A JP 2018151071A JP 2018151071 A JP2018151071 A JP 2018151071A JP 6964052 B2 JP6964052 B2 JP 6964052B2
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- Prior art keywords
- actuator
- pump
- port
- pressure
- valve
- 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.)
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-
- 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
-
- 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
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
-
- 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
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
- E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
-
- 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
- E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating 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
- 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
-
- 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
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30555—Inlet and outlet of the pressure compensating valve being connected to the directional control 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
-
- 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
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7135—Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
-
- 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
- F15B2211/78—Control of multiple output members
- F15B2211/781—Control of multiple output members one or more output members having priority
Description
図2に変形例に係る油圧回路10Aを示すとおり、圧力補償弁22(図1も参照)は省略可能である。圧力補償弁22を省略した場合、第1方向切換弁21の構造は、図2に示す変形例のように上記実施形態と同じでもよく、また、変更されてもよい。第1方向切換弁21が上記実施形態と同様構造の場合、一次補償ライン25および二次補償ライン26(図1も参照)に代えて、接続油路25Aが一次ポート21qを二次ポート21rに接続する。信号圧供給ライン18は、この接続油路25Aから分岐して優先弁32に接続される。接続油路25Aを流れる油圧が、第1アクチュエータ(走行モータ)の負荷圧として優先弁32に供給される。この変形例においても、操作並行時に走行速度と作業装置の動作速度との双方が低下することを抑止でき、走行速度を高く維持できる。
11 第1アクチュエータ
12 第2アクチュエータ
13 ポンプ
15 第1ポンプライン
16 第2ポンプライン
18 信号圧供給ライン
21 第1方向切換弁
21a,21b 給排ポート
21p ポンプポート
21q 一次ポート
21r 二次ポート
22 圧力補償弁
26 二次補償ライン
31 第2方向切換弁
31a,31b 給排ポート
31p ポンプポート
32 優先弁
Claims (3)
- 第1アクチュエータと、
第2アクチュエータと、
ポンプと、
ポンプポートおよび前記第1アクチュエータに接続される一対の給排ポートを有し、前記第1アクチュエータを作動させる操作が行われると当該ポンプポートを当該給排ポートの一方に接続する第1方向切換弁と、
ポンプポートおよび前記第2アクチュエータに接続される一対の給排ポートを有し、前記第2アクチュエータを作動させる操作が行われると当該ポンプポートを当該給排ポートの一方に接続する第2方向切換弁と、
前記ポンプの吐出口を前記第1方向切換弁の前記ポンプポートに接続する第1ポンプラインと、
前記ポンプの吐出口を前記第2方向切換弁の前記ポンプポートに接続する第2ポンプラインと、
前記第2ポンプライン上に設けられた優先弁と、を備え、
前記優先弁は、前記ポンプの吐出圧と前記第1アクチュエータの負荷圧との差圧が設定値よりも大きいときには前記第2ポンプラインを全開とし、前記差圧が前記設定値よりも小さいときには、当該差圧が小さくなるほど前記第2ポンプラインの開度を小さくするように構成されている、建設機械の油圧回路。 - 前記第1アクチュエータに対応して設けられる圧力補償弁を更に備え、
前記第1方向切換弁が、前記圧力補償弁の一次側と接続される一次ポート、および、前記圧力補償弁の二次側と二次補償ラインを介して接続される二次ポートを更に有し、
前記第1アクチュエータを作動させる操作が行われると、前記第1方向切換弁の前記ポンプポートが前記一次ポートと連通すると共に前記二次ポートが前記第1方向切換弁の前記給排ポートの一方と連通し、前記ポンプポートが前記一次ポート、前記圧力補償弁および前記二次ポートを介して前記給排ポートの一方に接続され、
前記優先弁は、信号圧供給ラインを介して前記二次補償ラインと接続され、前記二次補償ラインを流れる作動油圧が前記第1アクチュエータの負荷圧として前記優先弁に供給される、請求項1に記載の建設機械の油圧回路。 - 前記第1アクチュエータが走行用のアクチュエータであり、前記第2アクチュエータが作業装置を作動させるためのアクチュエータである、請求項1または2に記載の建設機械の油圧回路。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018151071A JP6964052B2 (ja) | 2018-08-10 | 2018-08-10 | 建設機械の油圧回路 |
PCT/JP2019/030113 WO2020031816A1 (ja) | 2018-08-10 | 2019-08-01 | 建設機械の油圧回路 |
US17/262,838 US11131080B2 (en) | 2018-08-10 | 2019-08-01 | Hydraulic circuit of construction machine |
DE112019004044.8T DE112019004044T5 (de) | 2018-08-10 | 2019-08-01 | Hydraulikkreislauf einer baumaschine |
CN201980048928.8A CN112424485A (zh) | 2018-08-10 | 2019-08-01 | 工程机械的油压回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018151071A JP6964052B2 (ja) | 2018-08-10 | 2018-08-10 | 建設機械の油圧回路 |
Publications (3)
Publication Number | Publication Date |
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JP2020026828A JP2020026828A (ja) | 2020-02-20 |
JP2020026828A5 JP2020026828A5 (ja) | 2021-06-10 |
JP6964052B2 true JP6964052B2 (ja) | 2021-11-10 |
Family
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JP2018151071A Active JP6964052B2 (ja) | 2018-08-10 | 2018-08-10 | 建設機械の油圧回路 |
Country Status (5)
Country | Link |
---|---|
US (1) | US11131080B2 (ja) |
JP (1) | JP6964052B2 (ja) |
CN (1) | CN112424485A (ja) |
DE (1) | DE112019004044T5 (ja) |
WO (1) | WO2020031816A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11713775B2 (en) * | 2020-08-18 | 2023-08-01 | Deere & Company | Agricultural implements and hydraulic circuits therefor incorporating one or more priority valves |
WO2023176732A1 (ja) * | 2022-03-15 | 2023-09-21 | 川崎重工業株式会社 | 液圧駆動装置 |
WO2023176733A1 (ja) * | 2022-03-15 | 2023-09-21 | 川崎重工業株式会社 | 液圧駆動装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58153829A (ja) * | 1982-03-08 | 1983-09-13 | Kobe Steel Ltd | 油圧シヨベルの油圧回路 |
JP2948064B2 (ja) | 1993-09-06 | 1999-09-13 | 日立建機株式会社 | 建設機械の油圧駆動装置 |
US5950429A (en) * | 1997-12-17 | 1999-09-14 | Husco International, Inc. | Hydraulic control valve system with load sensing priority |
CN103649554B (zh) * | 2011-03-15 | 2016-05-04 | 胡斯可国际股份有限公司 | 基于优先权将流体从多个泵分配至多个液压功能的系统 |
WO2016085959A1 (en) * | 2014-11-24 | 2016-06-02 | Parker-Hannifin Corporation | System architectures for steering and work functions in a wheel loader |
CN105201944B (zh) * | 2015-09-25 | 2017-10-03 | 广西柳工机械股份有限公司 | 流量放大阀及转向液压系统 |
JP2017190799A (ja) * | 2016-04-11 | 2017-10-19 | キャタピラー エス エー アール エル | 作業機械の流体圧回路 |
-
2018
- 2018-08-10 JP JP2018151071A patent/JP6964052B2/ja active Active
-
2019
- 2019-08-01 CN CN201980048928.8A patent/CN112424485A/zh active Pending
- 2019-08-01 DE DE112019004044.8T patent/DE112019004044T5/de active Pending
- 2019-08-01 WO PCT/JP2019/030113 patent/WO2020031816A1/ja active Application Filing
- 2019-08-01 US US17/262,838 patent/US11131080B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2020031816A1 (ja) | 2020-02-13 |
DE112019004044T5 (de) | 2021-05-06 |
US20210140144A1 (en) | 2021-05-13 |
JP2020026828A (ja) | 2020-02-20 |
US11131080B2 (en) | 2021-09-28 |
CN112424485A (zh) | 2021-02-26 |
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