KR20200035951A - 쇼벨 - Google Patents
쇼벨 Download PDFInfo
- Publication number
- KR20200035951A KR20200035951A KR1020207002782A KR20207002782A KR20200035951A KR 20200035951 A KR20200035951 A KR 20200035951A KR 1020207002782 A KR1020207002782 A KR 1020207002782A KR 20207002782 A KR20207002782 A KR 20207002782A KR 20200035951 A KR20200035951 A KR 20200035951A
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- hydraulic
- hydraulic oil
- valve
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- control
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 104
- 230000001133 acceleration Effects 0.000 claims abstract description 69
- 239000013642 negative control Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 13
- 230000004043 responsiveness Effects 0.000 description 12
- 230000007423 decrease Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- 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
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
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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
- E02F9/2285—Pilot-operated systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
-
- 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
- E02F9/2012—Setting the functions of the control levers, e.g. changing assigned functions among operations levers, setting functions dependent on the operator or seat orientation
-
- 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
-
- 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
- E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
- E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps 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
- E02F9/2264—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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2271—Actuators and supports therefor and protection therefor
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- 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
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- 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
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
-
- 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
- F15B2211/275—Control of the prime mover, e.g. hydraulic control
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
도 2는 도 1의 쇼벨의 구동계의 구성예를 나타내는 블록도이다.
도 3은 도 1의 쇼벨에 탑재되는 유압회로의 제1 구성예를 나타내는 개략도이다.
도 4는 작업모드에 따른 레버조작량과 블리드밸브 개구면적과의 관계를 나타내는 도 (1)이다.
도 5는 작업모드에 따른 레버조작량과 블리드밸브 개구면적과의 관계를 나타내는 도 (2)이다.
도 6은 작업모드에 따른 레버조작량과 블리드밸브 개구면적과의 관계를 나타내는 도 (3)이다.
도 7은 비례밸브 전륫값과 블리드밸브 개구면적과의 관계를 나타내는 도이다.
도 8은 붐을 조작하고 있을 때의 실린더압의 시간적 추이(推移)를 나타내는 도이다.
도 9는 도 1의 쇼벨에 탑재되는 유압회로의 제1 구성예의 변형예를 나타내는 개략도이다.
도 10은 도 1의 쇼벨에 탑재되는 유압회로의 제2 구성예를 나타내는 개략도이다.
도 11은 작업모드에 따른 레버조작량과 제어밸브의 PT 개구면적과의 관계를 나타내는 도이다.
도 12는 도 1의 쇼벨에 탑재되는 유압회로의 다른 예를 나타내는 개략도이다.
도 13은 전기식 조작장치를 포함하는 조작시스템의 구성예를 나타내는 도이다.
1A 좌측주행용 유압모터
1B 우측주행용 유압모터
2 선회기구
2A 선회용 유압모터
3 상부선회체
4 붐
5 암
6 버킷
7 붐실린더
8 암실린더
9 버킷실린더
10 캐빈
11 엔진
13 레귤레이터
13L 레귤레이터
13R 레귤레이터
14 메인펌프
14L 메인펌프
14R 메인펌프
15 파일럿펌프
17 컨트롤밸브
19L 네거티브컨트롤압 센서
19R 네거티브컨트롤압 센서
26 조작장치
26A 암조작레버
26B 붐조작레버
28 토출압센서
28L 토출압센서
28R 토출압센서
29 조작압센서
29A 조작압센서
29B 조작압센서
30 컨트롤러
31, 31L1, 31R1 비례밸브
32 작업모드선택 다이얼
33L1, 33L2, 33R1, 33R2 감압밸브
42L, 42R 관로
171, 172, 173, 174, 175, 175, 176 제어밸브
177, 177L, 177R 블리드밸브
300 가감속특성제어부
Claims (6)
- 하부주행체와,
상기 하부주행체에 선회 가능하게 탑재되는 상부선회체와,
상기 상부선회체에 탑재되는 유압펌프와,
상기 유압펌프가 토출하는 작동유에 의하여 구동되는 유압 액추에이터와,
상기 유압 액추에이터의 조작을 위하여 이용되는 조작장치와,
상기 조작장치의 조작에 대한 상기 유압 액추에이터의 가감속특성을, 작업모드에 따라 제어하는 제어장치를 구비하는, 쇼벨. - 제1항에 있어서,
상기 작업모드는, 상기 가감속특성이 높은 제1 모드와, 상기 제1 모드보다 상기 가감속특성이 낮은 제2 모드를 포함하는, 쇼벨. - 제2항에 있어서,
상기 제어장치는, 상기 제2 모드가 선택되어 있는 경우, 상기 가감속특성을 낮게 하고, 또한 상기 유압펌프를 구동하는 엔진의 회전수를 저감하는, 쇼벨. - 제1항에 있어서,
상기 유압펌프가 토출하는 작동유 중, 상기 유압 액추에이터를 경유하지 않고 작동유탱크에 흐르는 작동유의 유량을 제어하는 블리드밸브를 구비하고,
상기 제어장치는, 상기 블리드밸브의 개구면적을 변경함으로써, 상기 가감속특성을 제어하는, 쇼벨. - 제4항에 있어서,
상기 제어장치는, 상기 작업모드마다 정해진 상기 조작장치의 조작량과 상기 블리드밸브의 개구면적과의 관계를 나타내는 개구특성에 근거하여, 상기 블리드밸브의 개구면적을 변경하는, 쇼벨. - 제1항에 있어서,
상기 유압펌프로부터 상기 유압 액추에이터로 향하는 작동유의 흐름을 제어하는 제어밸브를 구비하고,
상기 제어장치는, 상기 제어밸브에 작용하는 파일럿압을 변경함으로써, 상기 가감속특성을 제어하는, 쇼벨.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017145751 | 2017-07-27 | ||
| JPJP-P-2017-145751 | 2017-07-27 | ||
| PCT/JP2018/027975 WO2019022164A1 (ja) | 2017-07-27 | 2018-07-25 | ショベル |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20200035951A true KR20200035951A (ko) | 2020-04-06 |
| KR102490185B1 KR102490185B1 (ko) | 2023-01-18 |
Family
ID=65040795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020207002782A Active KR102490185B1 (ko) | 2017-07-27 | 2018-07-25 | 쇼벨 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11378101B2 (ko) |
| EP (1) | EP3660228B1 (ko) |
| JP (1) | JP7071979B2 (ko) |
| KR (1) | KR102490185B1 (ko) |
| CN (1) | CN110998034B (ko) |
| WO (1) | WO2019022164A1 (ko) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3943674B1 (en) * | 2019-03-19 | 2025-08-20 | Sumitomo Construction Machinery Co., Ltd. | Excavator |
| JP7182579B2 (ja) * | 2020-03-27 | 2022-12-02 | 日立建機株式会社 | 作業機械 |
| JP7463163B2 (ja) * | 2020-03-30 | 2024-04-08 | 住友建機株式会社 | ショベル |
| JP2022096795A (ja) * | 2020-12-18 | 2022-06-30 | 川崎重工業株式会社 | 弁ユニットおよび弁装置 |
| KR20230163390A (ko) * | 2021-03-31 | 2023-11-30 | 스미토모 겐키 가부시키가이샤 | 쇼벨 |
| JP2024126390A (ja) * | 2023-03-07 | 2024-09-20 | 株式会社クボタ | 作業機及び作業機の制御方法 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534268A (en) * | 1981-07-10 | 1985-08-13 | Hitachi Construction Machinery Co., Ltd. | Hydraulic fluid circuit of hydraulic shovel |
| US5692377A (en) * | 1995-01-11 | 1997-12-02 | Shin Caterpillar Mitsubishi Ltd. | Apparatus for controlling lifting operation |
| JPH11303809A (ja) * | 1998-04-20 | 1999-11-02 | Komatsu Ltd | 油圧駆動機械のポンプ制御装置 |
| US6378303B1 (en) * | 1998-07-07 | 2002-04-30 | Kobe Steel, Ltd. | Hydraulic control device of a working machine |
| WO2005056933A1 (ja) * | 2003-12-09 | 2005-06-23 | Komatsu Ltd. | 建設機械の油圧駆動制御装置及び方法 |
| US20090218112A1 (en) * | 2008-02-29 | 2009-09-03 | Caterpillar Inc. | Semi-autonomous excavation control system |
| WO2014013910A1 (ja) | 2012-07-19 | 2014-01-23 | 住友建機株式会社 | ショベル |
| US20150252819A1 (en) * | 2012-10-18 | 2015-09-10 | Takako Satake | Work Machine |
| US20160145835A1 (en) * | 2013-06-26 | 2016-05-26 | Volvo Construction Equipment Ab | Device for controlling control valve of construction machine, method for controlling same, and method for controlling discharge flow rate of hydraulic pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333017A (ja) | 2006-06-13 | 2007-12-27 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | 建設機械の省エネ装置 |
| KR101736644B1 (ko) | 2012-11-07 | 2017-05-16 | 히다찌 겐끼 가부시키가이샤 | 작업 기계의 유압 제어 장치 |
| JP6191494B2 (ja) * | 2014-02-14 | 2017-09-06 | コベルコ建機株式会社 | 建設機械の油圧制御装置 |
| WO2015137329A1 (ja) * | 2014-03-11 | 2015-09-17 | 住友重機械工業株式会社 | ショベル |
| JP6117391B1 (ja) | 2016-02-17 | 2017-04-19 | Enix株式会社 | 浮遊する波エネルギー変換島状プラットフォーム |
| US10407875B2 (en) * | 2017-04-24 | 2019-09-10 | Komatsu Ltd. | Control system and work machine |
-
2018
- 2018-07-25 CN CN201880050085.0A patent/CN110998034B/zh active Active
- 2018-07-25 JP JP2019532845A patent/JP7071979B2/ja active Active
- 2018-07-25 EP EP18837352.6A patent/EP3660228B1/en active Active
- 2018-07-25 KR KR1020207002782A patent/KR102490185B1/ko active Active
- 2018-07-25 WO PCT/JP2018/027975 patent/WO2019022164A1/ja not_active Ceased
-
2020
- 2020-01-23 US US16/750,195 patent/US11378101B2/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534268A (en) * | 1981-07-10 | 1985-08-13 | Hitachi Construction Machinery Co., Ltd. | Hydraulic fluid circuit of hydraulic shovel |
| US5692377A (en) * | 1995-01-11 | 1997-12-02 | Shin Caterpillar Mitsubishi Ltd. | Apparatus for controlling lifting operation |
| JPH11303809A (ja) * | 1998-04-20 | 1999-11-02 | Komatsu Ltd | 油圧駆動機械のポンプ制御装置 |
| US6378303B1 (en) * | 1998-07-07 | 2002-04-30 | Kobe Steel, Ltd. | Hydraulic control device of a working machine |
| WO2005056933A1 (ja) * | 2003-12-09 | 2005-06-23 | Komatsu Ltd. | 建設機械の油圧駆動制御装置及び方法 |
| US20090218112A1 (en) * | 2008-02-29 | 2009-09-03 | Caterpillar Inc. | Semi-autonomous excavation control system |
| WO2014013910A1 (ja) | 2012-07-19 | 2014-01-23 | 住友建機株式会社 | ショベル |
| US20150114731A1 (en) * | 2012-07-19 | 2015-04-30 | Sumitomo(S.H.I.) Construction Machinery Co., Ltd. | Shovel connectable with an information terminal |
| US20150252819A1 (en) * | 2012-10-18 | 2015-09-10 | Takako Satake | Work Machine |
| US20160145835A1 (en) * | 2013-06-26 | 2016-05-26 | Volvo Construction Equipment Ab | Device for controlling control valve of construction machine, method for controlling same, and method for controlling discharge flow rate of hydraulic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| US20200157764A1 (en) | 2020-05-21 |
| JP7071979B2 (ja) | 2022-05-19 |
| US11378101B2 (en) | 2022-07-05 |
| WO2019022164A1 (ja) | 2019-01-31 |
| CN110998034A (zh) | 2020-04-10 |
| KR102490185B1 (ko) | 2023-01-18 |
| JPWO2019022164A1 (ja) | 2020-07-09 |
| EP3660228A1 (en) | 2020-06-03 |
| EP3660228A4 (en) | 2020-08-19 |
| EP3660228B1 (en) | 2022-04-20 |
| CN110998034B (zh) | 2022-04-29 |
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