WO2017094454A1 - 圧力補償ユニット - Google Patents
圧力補償ユニット Download PDFInfo
- Publication number
- WO2017094454A1 WO2017094454A1 PCT/JP2016/083083 JP2016083083W WO2017094454A1 WO 2017094454 A1 WO2017094454 A1 WO 2017094454A1 JP 2016083083 W JP2016083083 W JP 2016083083W WO 2017094454 A1 WO2017094454 A1 WO 2017094454A1
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- WO
- WIPO (PCT)
- Prior art keywords
- line
- pressure
- valve
- relief
- pressure compensation
- Prior art date
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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
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/026—Pressure compensating valves
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- 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
- F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
-
- 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
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- 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
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- 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
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6052—Load sensing circuits having valve means between output member and the load sensing circuit using check 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6057—Load sensing circuits having valve means between output member and the load sensing circuit using directional control 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/65—Methods of control of the load sensing pressure
- F15B2211/651—Methods of control of the load sensing pressure characterised by the way the load pressure is communicated to the load sensing circuit
-
- 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
- F15B2211/65—Methods of control of the load sensing pressure
- F15B2211/654—Methods of control of the load sensing pressure the load sensing pressure being lower than the load pressure
Definitions
- a pressure compensation unit including a pressure compensation valve is generally provided for each actuator.
- the maximum load pressure is guided to the pressure compensation valve as a signal pressure.
- the differential pressure between the side relay line pressure and the maximum load pressure is maintained constant. Thereby, even if the maximum load pressure fluctuates, the flow rate of the hydraulic fluid supplied to the actuator is kept constant.
- the load pressure of the actuator is larger than the set pressure of the relief valve, the pump pressure is guided to the pressure compensation valve as a signal pressure, so that the load pressure of the actuator can be suppressed below a desired pressure.
- the pressure compensation valve is supplied with the pressure of the upstream relay line through a pilot line, and the pressure compensation unit is provided in a bypass line connecting the pilot line and the downstream relay line, and in the bypass line And a bypass valve configured to keep the flow rate of the working fluid flowing through the bypass line constant. According to this configuration, it is possible to reliably suppress an increase in the load pressure of the actuator.
- the control valve 3 has a pump port 31, a pair of relay ports 32, a pair of supply / discharge ports 33, and a tank port 34.
- the pump port 31 is connected to the common pump line 21 by a supply line 25, and the pair of relay ports 32 is connected to the pressure compensation valve 4 by an upstream relay line 41 and a downstream relay line 42.
- the pair of supply / discharge ports 33 is connected to the actuator 10 by a pair of supply / discharge lines 26, and the tank port 34 is connected to the common tank line 24 by a discharge line 27.
- a high pressure selection valve 52 is connected to the tip of the load pressure detection line 51.
- the high pressure selection valves 52 are connected to each other by the high pressure selection line 22.
- the hydraulic circuit 1 is configured such that the highest load pressure PLm is detected among the load pressures PL of the actuator 10.
- the high pressure selection line 22 of the terminal pressure compensation unit 2A is connected to the maximum load pressure line 23 outside the pressure compensation unit 2A. That is, the maximum load pressure PLm is guided from the high pressure selection line 22 of the terminal pressure compensation unit 2A to the regulator 12 through the maximum load pressure line 23.
- the pressure compensation valve 4 operates according to a differential pressure between the pressure of the upstream relay line 41 guided through the first pilot line 43 and the signal pressure guided through the second pilot line 44.
- the pressure compensation valve 4 blocks the upstream relay line 41 and the downstream relay line 42 if the sum of the spring force equivalent pressure and the signal pressure is larger than the pressure of the upstream relay line 41, and the spring force equivalent pressure and the signal pressure If the sum is smaller than the pressure of the upstream relay line 41, the upstream relay line 41 is communicated with the downstream relay line 42.
- the load pressure PL of the actuator 10 can be suppressed to a desired pressure or less. Moreover, since the relief line 61 provided with the relief valve 62 is connected to the downstream relay line 42, one actuator 10 (pressure compensation unit 2A) is not operated, and the other actuator (pressure compensation unit 2A) is not operated. ) Is operating, the load pressure PL of the other actuator does not act on the relief valve of one actuator. Accordingly, there is no problem that the working fluid of the operating pressure compensation unit 2A is discharged via the relief valve 62 of the non-operating pressure compensation unit 2A, and energy loss can be prevented.
- the relief valve 152 and the switching valve 140 (pilot port thereof) provided for each actuator are connected to the maximum load pressure line 103.
- the flow rate discharged from 103 may increase, and the pump discharge flow rate will be significantly reduced.
- the relief valve 62 and the switching valve 7 (pilot port) provided for each actuator are connected to its own load pressure detection line 51, Unlike the pressure compensation unit 100, the pump discharge flow rate is not significantly reduced.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
図2に、本発明の第1実施形態に係る圧力補償ユニット2Aを示し、図1にその圧力補償ユニット2Aが複数組み込まれた液圧回路1を示す。図1では、圧力補償ユニット2Aが2つのみ描かれているが、圧力補償ユニット2Aの数は3つ以上であってもよい。
次に、図3を参照して、本発明の第2実施形態に係る圧力補償ユニット2Bを説明する。なお、本実施形態において、第1実施形態と同一構成要素には同一符号を付し、重複した説明は省略する。
本発明は上述した第1および第2実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。
2A,2B 圧力補償ユニット
3 制御弁
31 ポンプポート
32 中継ポート
33 給排ポート
34 タンクポート
4 圧力補償弁
41 上流側中継ライン
42 下流側中継ライン
43,44 パイロットライン
51 負荷圧検出ライン
61 逃しライン
62 リリーフ弁
63 絞り
7 切換弁
73 第1パイロットライン
74 第2パイロットライン
81 バイパスライン
82 バイパス弁
Claims (3)
- アクチュエータに対する作動液の供給および排出を制御する制御弁であって、ポンプポート、一対の中継ポート、一対の給排ポートおよびタンクポートを有する制御弁と、
上流側中継ラインおよび下流側中継ラインにより前記一対の中継ポートと接続された、前記上流側中継ラインの圧力と信号圧との差圧に応じて作動する圧力補償弁と、
前記下流側中継ラインから分岐する負荷圧検出ラインと、
前記下流側中継ラインと接続された逃しラインであって、リリーフ弁が設けられた逃しラインと、
前記逃しラインに作動液が流れないときは前記信号圧として最高負荷圧を前記圧力補償弁へ導き、前記逃しラインに作動液が流れるときは前記信号圧としてポンプ圧を前記圧力補償弁へ導くように構成された切換弁と、
を備える、圧力補償ユニット。 - 前記逃しラインには、前記リリーフ弁の上流側に絞りが設けられており、
前記切換弁は、第1パイロットラインにより前記下流側中継ラインと接続されているとともに、第2パイロットラインにより前記絞りと前記リリーフ弁の間で前記逃しラインに接続されている、請求項1に記載の圧力補償ユニット。 - 前記圧力補償弁へは、パイロットラインを通じて前記上流側中継ラインの圧力が導かれ、
前記パイロットラインと前記下流側中継ラインとを接続するバイパスラインと、
前記バイパスラインに設けられた、前記バイパスラインに流れる作動液の流量を一定に保つように構成されたバイパス弁と、をさらに備える、請求項1または2に記載の圧力補償ユニット。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112016005554.4T DE112016005554B4 (de) | 2015-12-04 | 2016-11-08 | Druckausgleichseinheit |
US15/781,180 US10422110B2 (en) | 2015-12-04 | 2016-11-08 | Pressure compensation unit |
KR1020187017984A KR102023686B1 (ko) | 2015-12-04 | 2016-11-08 | 압력 보상 유닛 |
CN201680070229.XA CN108291560B (zh) | 2015-12-04 | 2016-11-08 | 压力补偿单元 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015237392A JP6603560B2 (ja) | 2015-12-04 | 2015-12-04 | 圧力補償ユニット |
JP2015-237392 | 2015-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017094454A1 true WO2017094454A1 (ja) | 2017-06-08 |
Family
ID=58797064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/083083 WO2017094454A1 (ja) | 2015-12-04 | 2016-11-08 | 圧力補償ユニット |
Country Status (6)
Country | Link |
---|---|
US (1) | US10422110B2 (ja) |
JP (1) | JP6603560B2 (ja) |
KR (1) | KR102023686B1 (ja) |
CN (1) | CN108291560B (ja) |
DE (1) | DE112016005554B4 (ja) |
WO (1) | WO2017094454A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10801525B2 (en) * | 2018-01-12 | 2020-10-13 | Eaton Intelligent Power Limited | Hydraulic valve with pressure limiter function |
JP7049213B2 (ja) * | 2018-08-10 | 2022-04-06 | 川崎重工業株式会社 | 建設機械の油圧回路 |
CN113286951B (zh) * | 2018-11-14 | 2023-04-14 | 株式会社岛津制作所 | 流体控制装置 |
CN109630504B (zh) * | 2018-12-26 | 2021-01-26 | 太原理工大学 | 一种带压力补偿的进出油口独立控制系统 |
JP7257181B2 (ja) * | 2019-02-25 | 2023-04-13 | ナブテスコ株式会社 | 駆動装置及び建設機械 |
CN110118209B (zh) * | 2019-05-23 | 2023-10-20 | 福州大学 | 保证hb砼泵机稳定工作的换向控制回路系统 |
CN112064714B (zh) * | 2020-08-26 | 2022-06-03 | 合肥工业大学 | 一种新型液压挖掘机流量控制系统 |
US11608616B2 (en) | 2020-09-30 | 2023-03-21 | Kubota Corporation | Hydraulic system for working machine |
DE102021202207B4 (de) | 2021-03-08 | 2022-12-01 | Hawe Hydraulik Se | Vorwahlventil, Hydraulikventilverband und Hydrauliksteuervorrichtung |
CN113464514B (zh) * | 2021-07-30 | 2023-06-02 | 湖南三一中型起重机械有限公司 | 集成式电控多路阀及起重机 |
CN113775592B (zh) * | 2021-11-11 | 2022-01-07 | 太原理工大学 | 数字机械冗余压力补偿流量控制系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001055603A1 (fr) * | 2000-01-25 | 2001-08-02 | Hitachi Construction Machinery Co., Ltd. | Dispositif de commande hydraulique |
JP2009281587A (ja) * | 2008-04-25 | 2009-12-03 | Husco Internatl Inc | 負荷検出による圧力制限を備えたポスト圧力補償の流体圧制御バルブ |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6334308B1 (en) | 1998-03-04 | 2002-01-01 | Komatsu Ltd. | Pressure compensating valve, unloading pressure control valve and hydraulically operated device |
WO2005047709A1 (ja) * | 2003-11-14 | 2005-05-26 | Komatsu Ltd. | 建設機械の油圧制御装置 |
JP2007024103A (ja) * | 2005-07-13 | 2007-02-01 | Hitachi Constr Mach Co Ltd | 油圧駆動装置 |
US7487707B2 (en) * | 2006-09-27 | 2009-02-10 | Husco International, Inc. | Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve |
US9003786B2 (en) * | 2011-05-10 | 2015-04-14 | Caterpillar Inc. | Pressure limiting in hydraulic systems |
CN103597218B (zh) * | 2011-06-09 | 2016-04-06 | 沃尔沃建造设备有限公司 | 用于工程机械的液压系统 |
JP5293901B1 (ja) * | 2011-12-09 | 2013-09-18 | トヨタ自動車株式会社 | 油圧制御装置 |
JP5860711B2 (ja) | 2012-02-03 | 2016-02-16 | Kyb株式会社 | 流体圧制御装置 |
CN204344992U (zh) * | 2014-10-17 | 2015-05-20 | 徐工集团工程机械股份有限公司 | 负载敏感多路阀、负载敏感系统及挖掘机 |
JP6302601B2 (ja) * | 2015-12-10 | 2018-03-28 | 川崎重工業株式会社 | 油圧駆動システム |
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2015
- 2015-12-04 JP JP2015237392A patent/JP6603560B2/ja active Active
-
2016
- 2016-11-08 DE DE112016005554.4T patent/DE112016005554B4/de active Active
- 2016-11-08 US US15/781,180 patent/US10422110B2/en active Active
- 2016-11-08 KR KR1020187017984A patent/KR102023686B1/ko active Active
- 2016-11-08 WO PCT/JP2016/083083 patent/WO2017094454A1/ja active Application Filing
- 2016-11-08 CN CN201680070229.XA patent/CN108291560B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001055603A1 (fr) * | 2000-01-25 | 2001-08-02 | Hitachi Construction Machinery Co., Ltd. | Dispositif de commande hydraulique |
JP2009281587A (ja) * | 2008-04-25 | 2009-12-03 | Husco Internatl Inc | 負荷検出による圧力制限を備えたポスト圧力補償の流体圧制御バルブ |
Also Published As
Publication number | Publication date |
---|---|
DE112016005554B4 (de) | 2021-10-21 |
JP6603560B2 (ja) | 2019-11-06 |
JP2017101792A (ja) | 2017-06-08 |
US10422110B2 (en) | 2019-09-24 |
KR20180099687A (ko) | 2018-09-05 |
DE112016005554T5 (de) | 2018-08-09 |
CN108291560A (zh) | 2018-07-17 |
US20180347153A1 (en) | 2018-12-06 |
KR102023686B1 (ko) | 2019-09-23 |
CN108291560B (zh) | 2019-11-12 |
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