JP6194259B2 - 作業機の制御システム - Google Patents
作業機の制御システム Download PDFInfo
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- JP6194259B2 JP6194259B2 JP2014016745A JP2014016745A JP6194259B2 JP 6194259 B2 JP6194259 B2 JP 6194259B2 JP 2014016745 A JP2014016745 A JP 2014016745A JP 2014016745 A JP2014016745 A JP 2014016745A JP 6194259 B2 JP6194259 B2 JP 6194259B2
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- 230000007935 neutral effect Effects 0.000 claims description 68
- 239000012530 fluid Substances 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 description 79
- 230000007246 mechanism Effects 0.000 description 30
- 230000007423 decrease Effects 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- E02F9/2221—Control of flow rate; Load sensing arrangements
-
- 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
-
- 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
-
- 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
- E02F9/22—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
- E02F9/2278—Hydraulic circuits
- E02F9/2285—Pilot-operated systems
-
- 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
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- 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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
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- 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
- F15B2211/205—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
- F15B2211/20—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
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
- F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for 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
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid 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
- F15B2211/30—Directional control
- F15B2211/36—Pilot pressure sensing
-
- 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
- F15B2211/40—Flow control
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6652—Control of the pressure source, e.g. control of the swash plate angle
-
- 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
Description
以下、図1から図4を参照して、本発明の第一の実施の形態に係る作業機の制御システム(以下、単に「制御システム」と称する。)100について説明する。
以下、図5を参照して、本発明の第二の実施の形態に係る作業機の制御システム(以下、単に「制御システム」と称する。)200について説明する。以下に示す第二の実施の形態では、上述した第一の実施の形態と異なる点を中心に説明し、第一の実施の形態と同様の機能を有する構成には同一の符号を付して説明を省略する。
200 作業機の制御システム
1 油圧ショベル(作業機)
10 油圧ポンプ(流体圧ポンプ)
11 レギュレータ
12 第一吐出ポート
13 第二吐出ポート
19 タンク
20 第一回路系統
21〜23 操作弁
25 第一中立通路
27 中立カット弁(第一中立カット弁)
30 第二回路系統
31〜34 操作弁
35 第二中立通路
37 中立カット弁(第二中立カット弁)
40 連通切換弁
41 第一連通切換弁
42 第二連通切換弁
50 吐出流量調整機構(吐出流量調整装置)
60 第一高圧選択回路
65 第一パイロット通路
70 第二高圧選択回路
75 第二パイロット通路
80 シャトル弁(高圧選択弁)
81 切換弁
82 差圧減圧弁
150 吐出流量調整機構(吐出流量調整装置)
181 第一切換弁(切換弁)
182 第二切換弁(切換弁)
250 吐出流量調整機構(吐出流量調整装置)
251 パイロットポンプ
255 コントローラ
260 第一減圧弁
270 第二減圧弁
280 第三減圧弁
Claims (6)
- 第一アクチュエータと第二アクチュエータとを有する作業機を制御する作業機の制御システムであって、
作動流体を第一吐出ポートと第二吐出ポートとから吐出するスプリットフロー型の流体圧ポンプと、
前記第一吐出ポートから吐出された作動流体が供給され、前記第一アクチュエータを制御する第一操作弁と当該第一操作弁がノーマル位置にある状態で前記第一吐出ポートをタンクに連通させる第一中立通路とを有する第一回路系統と、
前記第二吐出ポートから吐出された作動流体が供給され、前記第二アクチュエータを制御する第二操作弁と当該第二操作弁がノーマル位置にある状態で前記第二吐出ポートをタンクに連通させる第二中立通路とを有する第二回路系統と、
前記第一操作弁と前記第二操作弁とのいずれか一方が切り換えられたときの切換信号によって切り換えられて、前記第一操作弁又は前記第二操作弁が切り換えられていない側の前記第一吐出ポート又は前記第二吐出ポートを、前記第一操作弁又は前記第二操作弁が切り換えられた側の前記第一中立通路又は前記第二中立通路に連通させる連通切換弁と、
前記第一操作弁と前記第二操作弁とのいずれか一方から前記切換信号が入力された場合に前記流体圧ポンプの吐出流量を減少させるように調整する吐出流量調整装置と、を備えることを特徴とする作業機の制御システム。 - 前記流体圧ポンプは、パイロット圧によって制御される単一のレギュレータによって傾転角が調整される斜板を備え、前記レギュレータに作用するパイロット圧が高いほど吐出流量が多くなるように調整されることを特徴とする請求項1に記載の作業機の制御システム。
- 前記切換信号は、前記第一操作弁又は前記第二操作弁を切り換えるパイロット圧であり、
前記吐出流量調整装置は、
前記第一操作弁を切り換えるパイロット圧のうち最も高圧のパイロット圧を選択して連通させる第一高圧選択回路と、
前記第二操作弁を切り換えるパイロット圧のうち最も高圧のパイロット圧を選択して連通させる第二高圧選択回路と、を備え、
前記連通切換弁は、
前記第二高圧選択回路から連通するパイロット圧によって、前記第二吐出ポートと前記第二中立通路とが連通する状態から、前記第二吐出ポートと前記第一中立通路とが連通する状態に切り換えられる第一連通切換弁と、
前記第一高圧選択回路から連通するパイロット圧によって、前記第一吐出ポートと前記第一中立通路とが連通する状態から、前記第一吐出ポートと前記第二中立通路とが連通する状態に切り換えられる第二連通切換弁と、を備えることを特徴とする請求項2に記載の作業機の制御システム。 - 前記吐出流量調整装置は、
前記第一高圧選択回路と前記第二高圧選択回路とから連通するパイロット圧のうち高圧側のパイロット圧を選択して前記レギュレータに作用させる高圧選択弁と、
前記第一高圧選択回路と前記第二高圧選択回路とから連通するパイロット圧の差圧が大きいほど前記レギュレータに作用するパイロット圧を低くする差圧減圧弁と、を更に備えることを特徴とする請求項3に記載の作業機の制御システム。 - 前記吐出流量調整装置は、前記第一高圧選択回路から連通するパイロット圧と前記第二高圧選択回路から連通するパイロット圧とによって切り換えられ前記第一高圧選択回路から連通するパイロット圧と前記第二高圧選択回路から連通するパイロット圧とのうち高圧側を遮断し低圧側を前記差圧減圧弁に作用させる切換弁を更に備え、
前記差圧減圧弁は、前記レギュレータに作用するパイロット圧と前記切換弁から作用するパイロット圧との差圧が大きいほど前記レギュレータに作用するパイロット圧を低くすることを特徴とする請求項4に記載の作業機の制御システム。 - 前記切換信号は、前記第一操作弁又は前記第二操作弁の切り換え操作によって出力される電気信号であり、
前記吐出流量調整装置は、
パイロット圧を生成するパイロットポンプと、
前記第一操作弁のみから前記電気信号が入力された場合に、前記パイロットポンプからのパイロット圧を前記連通切換弁に導き、前記第二吐出ポートと前記第一中立通路とを連通させる第一減圧弁と、
前記第二操作弁のみから前記電気信号が入力された場合に、前記パイロットポンプからのパイロット圧を前記連通切換弁に導き、前記第一吐出ポートと前記第二中立通路とを連通させる第二減圧弁と、
前記第一操作弁と前記第二操作弁とのいずれか一方から前記電気信号が入力された場合に、前記パイロットポンプから前記レギュレータに導かれるパイロット圧を低くする第三減圧弁と、を備えることを特徴とする請求項2に記載の作業機の制御システム。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014016745A JP6194259B2 (ja) | 2014-01-31 | 2014-01-31 | 作業機の制御システム |
US15/113,071 US10208457B2 (en) | 2014-01-31 | 2015-01-27 | Working machine control system |
PCT/JP2015/052209 WO2015115430A1 (ja) | 2014-01-31 | 2015-01-27 | 作業機の制御システム |
DE112015000581.1T DE112015000581T5 (de) | 2014-01-31 | 2015-01-27 | Steuersystem einer Arbeitsmaschine |
KR1020167016761A KR101773732B1 (ko) | 2014-01-31 | 2015-01-27 | 작업기의 제어 시스템 |
CN201580003665.0A CN105874215B (zh) | 2014-01-31 | 2015-01-27 | 作业机的控制系统 |
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KR (1) | KR101773732B1 (ja) |
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DE102015211704A1 (de) * | 2015-06-24 | 2016-12-29 | Robert Bosch Gmbh | Ventilbaugruppe mit zumindest zwei Pumpenleitungen für eine Pumpe |
CN109695265B (zh) * | 2019-02-22 | 2023-12-15 | 江苏汇智高端工程机械创新中心有限公司 | 液压系统和工程车辆 |
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US3934742A (en) * | 1973-12-26 | 1976-01-27 | Hydraulic Industries, Inc. | Valve mechanism for automatic control of a number of fluid motors |
JPH0416002Y2 (ja) * | 1985-02-07 | 1992-04-10 | ||
JP3454313B2 (ja) * | 1992-05-29 | 2003-10-06 | 株式会社小松製作所 | 圧油供給装置 |
JP3681833B2 (ja) | 1996-09-19 | 2005-08-10 | ヤンマー株式会社 | 掘削旋回作業機の油圧回路 |
JP2000074233A (ja) * | 1998-08-27 | 2000-03-14 | Shin Caterpillar Mitsubishi Ltd | 流体圧切換弁 |
US7096772B2 (en) * | 2004-08-30 | 2006-08-29 | Caterpillar S.A.R.L. | System and method for controlling hydraulic fluid flow |
CN2767508Y (zh) * | 2004-11-03 | 2006-03-29 | 徐州徐工特种工程机械有限公司 | 挖掘装载机液压先导控制装置 |
CN101444887B (zh) * | 2007-11-27 | 2010-12-08 | 贵阳铝镁设计研究院 | 压脱机液压系统 |
CN201170758Y (zh) * | 2008-01-17 | 2008-12-24 | 圣路机械(嘉兴)制造有限公司 | 液压万向轮加载试验机的加载液压系统 |
JP5357864B2 (ja) * | 2008-03-31 | 2013-12-04 | 株式会社不二越 | 建設機械の油圧回路 |
JP5480847B2 (ja) * | 2011-06-21 | 2014-04-23 | 株式会社クボタ | 作業機 |
JP2013249849A (ja) * | 2012-05-30 | 2013-12-12 | Kobe Steel Ltd | 作業機械の油圧制御装置 |
EP2884010B1 (en) * | 2012-07-31 | 2018-06-06 | Hitachi Construction Machinery Tierra Co., Ltd. | Hydraulic drive device for construction machine |
JP6021226B2 (ja) * | 2013-11-28 | 2016-11-09 | 日立建機株式会社 | 建設機械の油圧駆動装置 |
JP6021227B2 (ja) * | 2013-11-28 | 2016-11-09 | 日立建機株式会社 | 建設機械の油圧駆動装置 |
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CN105874215B (zh) | 2017-11-28 |
US10208457B2 (en) | 2019-02-19 |
WO2015115430A1 (ja) | 2015-08-06 |
KR20160089471A (ko) | 2016-07-27 |
US20170009429A1 (en) | 2017-01-12 |
CN105874215A (zh) | 2016-08-17 |
DE112015000581T5 (de) | 2016-11-03 |
JP2015143538A (ja) | 2015-08-06 |
KR101773732B1 (ko) | 2017-08-31 |
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