JP2008057319A - 掘削機用オプション装置の油圧回路 - Google Patents
掘削機用オプション装置の油圧回路 Download PDFInfo
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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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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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
- E02F3/36—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
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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
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
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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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2271—Actuators and supports therefor and protection therefor
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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
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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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- 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
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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
- 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
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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
- 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
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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
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
- F15B2211/40561—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged upstream of the flow control means
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/41—Flow control characterised by the positions of the valve element
- F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow 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
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in control
-
- 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
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
- F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
- F15B2211/5059—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves using double counterbalance valves
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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
- 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
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- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7764—Choked or throttled pressure type
- Y10T137/7766—Choked passage through main valve head
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- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7764—Choked or throttled pressure type
- Y10T137/7768—Pilot controls supply to pressure chamber
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- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7769—Single acting fluid servo
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- 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
- Y10T137/87169—Supply and exhaust
- Y10T137/87193—Pilot-actuated
- Y10T137/87209—Electric
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Abstract
【解決手段】油圧ポンプ26からオプション装置24に供給される流量を制御する第1スプール15と、油圧ポンプからオプション装置に供給される流量を制御するポペット14及びポペットの背圧室17に弾性支持されるピストン13と、第1スプールを通過し、オプション装置に供給される作動油を制御するオプションスプール25と、第1スプール入口側の圧力と、第1スプール出口側の圧力及び弁ばね5の弾性力をたした圧力との差により切り換えられ、ポペットの背圧室に供給される流量を制御する第2スプール3と、ポペットのオリフィス14aを通過する流量を調整する制御手段とを備える。
【選択図】図6
Description
図1及び図2に示すように、油圧ポンプ26からの作動油は、供給ライン20とパイロット流路19に供給される。供給ライン20に供給される作動油によりポペット14を、図に於いて上向きに押し上げる。
油圧ポンプに連結されるオプション装置と、
油圧ポンプとオプション装置との間の流路に設けられ、切換時、油圧ポンプからオプション装置に供給される流量を制御する第1スプールと、
油圧ポンプと第1スプールとの間の流路を開閉せしめるように設けられ、第1スプールの切換時、油圧ポンプからオプション装置に供給される流量を制御するポペット及びポペットの背圧室に弾性支持されるピストンと、
第1スプールとオプション装置との間の流路に設けられ、切換時、第1スプールを通過し、オプション装置に供給される作動油を制御するオプションスプールと、
第1スプール入口側の圧力と、第1スプール出口側の圧力及び弁ばねの弾性力をたした圧力との差により切り換えられ、切換時、油圧ポンプからポペットの背圧室に連通する貫通流路を介してポペットの背圧室に供給される流量を制御する第2スプールと、
ポペットに内設され、第2スプールの切換を介して油圧ポンプからの作動油によりピストン及びポペットを加圧する際、ポペットのオリフィスを通過する流量を調整する制御手段とを備え、
オプション装置の初期制御区間で、第2スプールの切換によりポペットの背圧室からオプション装置に供給される流量が制御手段により設定された流量以上に増加されることを防止する。
ポペットのオリフィス入口側に取り付けられ、ポペットのオリフィスと連通するような貫通孔が形設されたシム(shim)と、ポペットのオリフィスに内設され、中央にオリフィスが貫通形成されたチェック弁とを含める。
第2スプールとピストンの背圧室との間の流路に設けられ、第2スプール切換時、油圧ポンプからピストンの背圧室に供給される作動油を制御する第2オリフィスと、
第1スプールとポペットとの間の流路に入口側が連通され、第2スプールに出口側が連通される流路に設けられ、油圧ポンプから吐き出され、第2スプールを切り換えさせる作動油を制御する第3オリフィスとをさらに備える。
オプション装置の負荷大小に関係なく、オプション装置に流量が一定として供給されることから、オプション装置の作動速度が一定していて操作性を向上させると共に、様々なオプション装置から要求される流量をそれぞれ調整することができ、作業能率を著しく向上させることが可能となる。しかも、オプション装置の初期制御区間で流量が過度に増加されることを防止し、オプション装置の初期作動時、安定性を確保することが可能となる。
図7に示すように、前述した油圧ポンプ26からの作動油は、供給ライン20と、パイロット流路19とにそれぞれ供給される。供給ライン20に供給される作動油によりポペット14を、図に於いて、上向きに押し上げる。これと同時に、ポペット14のオリフィス14aに内設されたチェック弁14bを上向きに押し上げてシム14cの位置まで移動させる。
5 弁ばね
12 弾性部材
13 ピストン
13a 第1オリフィス
14 ポペット
14a オリフィス
14b チェック弁
15 第1スプール
16 流路
17、29 背圧室
19 パイロット流路
20 供給ライン
24 オプション装置
25 オプションスプール
26 可変容量型油圧ポンプ
30 第2オリフィス
31 第3オリフィス
Claims (5)
- 可変容量型ポンプと、
前記油圧ポンプに連結されるオプション装置と、
前記油圧ポンプとオプション装置との間の流路に設けられ、切換時、油圧ポンプからオプション装置に供給される流量を制御する第1スプールと、
前記油圧ポンプと第1スプールとの間の流路を開閉せしめるように設けられ、前記第1スプールの切換時、油圧ポンプからオプション装置に供給される流量を制御するポペット及び前記ポペットの背圧室に弾性支持されるピストンと、
前記第1スプールとオプション装置との間の流路に設けられ、切換時、第1スプールを通過し、オプション装置に供給される作動油を制御するオプションスプールと、
前記第1スプール入口側の圧力と、第1スプール出口側の圧力及び弁ばねの弾性力をたした圧力との差により切り換えられ、切換時、油圧ポンプから前記ポペットの背圧室に連通する貫通流路を介してポペットの背圧室に供給される流量を制御する第2スプール及び、
前記ポペットに内設され、前記第2スプールの切換を介して前記油圧ポンプからの作動油によりピストン及びポペットを加圧する際、ポペットのオリフィスを通過する流量を調整する制御手段を備え、
前記オプション装置の初期制御区間で、前記第2スプールの切換によりポペットの背圧室からオプション装置に供給される流量が前記制御手段により設定された流量以上に増加されることを防止することを特徴とする掘削機用オプション装置の油圧回路。 - 前記制御手段は、
前記ポペットのオリフィス入口側に取り付けられ、前記ポペットのオリフィスと連通する貫通孔が形設されたシム(shim)及び、
前記ポペットのオリフィスに内設され、中央にオリフィスが貫通形成されたチェック弁を含めることを特徴とする請求項1に記載の掘削機用オプション装置の油圧回路。 - 前記ピストンに形成され、前記第2スプールの切換時、油圧ポンプから吐き出され、前記ポペットの背圧室に供給される作動油を制御する第1オリフィスをさらに備えることを特徴とする請求項1に記載の掘削機用オプション装置の油圧回路。
- 前記第2スプールとピストンの背圧室との間の流路に設けられ、前記第2スプールの切換時、油圧ポンプからピストンの背圧室に供給される作動油を制御する第2オリフィスをさらに備えることを特徴とする請求項1に記載の掘削機用オプション装置の油圧回路。
- 前記第1スプールとポペットとの間の流路に入口側が連通し、第2スプールに出口側が連通する流路に設けられ、油圧ポンプから吐き出され、第2スプールを切り換えさせる作動油を制御する第3オリフィスをさらに備えることを特徴とする請求項1に記載の掘削機用オプション装置の油圧回路。
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Application Number | Priority Date | Filing Date | Title |
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KR1020060082265A KR100800081B1 (ko) | 2006-08-29 | 2006-08-29 | 굴삭기용 옵션장치의 유압회로 |
KR10-2006-0082265 | 2006-08-29 |
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JP2008057319A true JP2008057319A (ja) | 2008-03-13 |
JP5124207B2 JP5124207B2 (ja) | 2013-01-23 |
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JP2007213543A Expired - Fee Related JP5124207B2 (ja) | 2006-08-29 | 2007-08-20 | 掘削機用オプション装置の油圧回路 |
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US (1) | US8113233B2 (ja) |
EP (1) | EP1895059B1 (ja) |
JP (1) | JP5124207B2 (ja) |
KR (1) | KR100800081B1 (ja) |
CN (1) | CN101135324B (ja) |
Cited By (2)
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JP2009068708A (ja) * | 2007-09-14 | 2009-04-02 | Volvo Construction Equipment Ab | 建設機械用流量制御装置 |
JP2013526688A (ja) * | 2010-05-17 | 2013-06-24 | ボルボ コンストラクション イクイップメント アーベー | 建設機械の油圧制御弁 |
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US8684037B2 (en) * | 2009-08-05 | 2014-04-01 | Eaton Corportion | Proportional poppet valve with integral check valve |
KR101094710B1 (ko) | 2010-11-10 | 2011-12-16 | 주식회사 고려다이캐스팅기계 | 유량제어밸브 |
CN103299088A (zh) * | 2010-12-28 | 2013-09-11 | 沃尔沃建造设备有限公司 | 用于施工设备的保持阀 |
WO2014014146A1 (ko) * | 2012-07-19 | 2014-01-23 | 볼보 컨스트럭션 이큅먼트 에이비 | 건설기계용 유량 컨트롤밸브 |
CN104968947A (zh) * | 2013-02-05 | 2015-10-07 | 沃尔沃建造设备有限公司 | 工程机械用压力控制阀 |
US20160221171A1 (en) * | 2015-02-02 | 2016-08-04 | Caterpillar Inc. | Hydraulic hammer having dual valve acceleration control system |
WO2017122836A1 (ko) * | 2016-01-11 | 2017-07-20 | 볼보 컨스트럭션 이큅먼트 에이비 | 건설기계용 유압시스템 |
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JP2003194006A (ja) * | 2001-12-20 | 2003-07-09 | Volvo Construction Equipment Holding Sweden Ab | 建設重装備用油量制御装置 |
JP2005016708A (ja) * | 2003-06-25 | 2005-01-20 | Volvo Construction Equipment Holding Sweden Ab | 重装備オプション装置用油圧回路 |
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-
2006
- 2006-08-29 KR KR1020060082265A patent/KR100800081B1/ko not_active IP Right Cessation
-
2007
- 2007-06-21 US US11/821,109 patent/US8113233B2/en not_active Expired - Fee Related
- 2007-06-29 EP EP07012747.7A patent/EP1895059B1/en not_active Expired - Fee Related
- 2007-07-13 CN CN2007101366053A patent/CN101135324B/zh not_active Expired - Fee Related
- 2007-08-20 JP JP2007213543A patent/JP5124207B2/ja not_active Expired - Fee Related
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JPH09268604A (ja) * | 1996-03-30 | 1997-10-14 | Samsung Heavy Ind Co Ltd | 重装備用の流量合流装置 |
JP2002004341A (ja) * | 2000-06-20 | 2002-01-09 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | 土木・建設機械のアクチュエータ切換用油圧回路 |
JP2003194006A (ja) * | 2001-12-20 | 2003-07-09 | Volvo Construction Equipment Holding Sweden Ab | 建設重装備用油量制御装置 |
JP2005016708A (ja) * | 2003-06-25 | 2005-01-20 | Volvo Construction Equipment Holding Sweden Ab | 重装備オプション装置用油圧回路 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009068708A (ja) * | 2007-09-14 | 2009-04-02 | Volvo Construction Equipment Ab | 建設機械用流量制御装置 |
JP2013526688A (ja) * | 2010-05-17 | 2013-06-24 | ボルボ コンストラクション イクイップメント アーベー | 建設機械の油圧制御弁 |
US9085875B2 (en) | 2010-05-17 | 2015-07-21 | Volvo Construction Equipment Ab | Hydraulic control valve for construction machinery |
Also Published As
Publication number | Publication date |
---|---|
CN101135324A (zh) | 2008-03-05 |
CN101135324B (zh) | 2012-02-01 |
US20080053538A1 (en) | 2008-03-06 |
US8113233B2 (en) | 2012-02-14 |
EP1895059A2 (en) | 2008-03-05 |
EP1895059B1 (en) | 2017-01-25 |
EP1895059A3 (en) | 2015-08-05 |
JP5124207B2 (ja) | 2013-01-23 |
KR100800081B1 (ko) | 2008-02-01 |
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