WO2014073515A1 - パワーショベルの流体圧制御装置 - Google Patents
パワーショベルの流体圧制御装置 Download PDFInfo
- Publication number
- WO2014073515A1 WO2014073515A1 PCT/JP2013/079852 JP2013079852W WO2014073515A1 WO 2014073515 A1 WO2014073515 A1 WO 2014073515A1 JP 2013079852 W JP2013079852 W JP 2013079852W WO 2014073515 A1 WO2014073515 A1 WO 2014073515A1
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- WIPO (PCT)
- Prior art keywords
- pump
- cylinder
- switching valve
- valve
- control valve
- Prior art date
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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
- 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
- F15B13/022—Flow-dividers; Priority 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
- E02F9/2239—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
- E02F9/2278—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
-
- 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
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/255—Flow control functions
-
- 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
- F15B2211/265—Control of multiple pressure sources
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
- F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using 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
- F15B2211/40—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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
-
- 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
Definitions
- the present invention relates to a fluid pressure control device for a power shovel.
- a first to third circuit system is connected to each of the first to third pumps, and the discharged oil of the third pump is joined to the first and second circuit systems as necessary.
- control circuit includes a speed increasing hydraulic valve for supplying the discharge oil of the third pump preferentially to the arm cylinder.
- the speed increasing hydraulic valve includes both pilot chambers through which the pilot pressure of the boom switching valve and the pilot pressure of the arm switching valve are respectively guided, and a spring that applies a biasing force in the same direction as the pilot pressure of the arm switching valve.
- the speed increasing hydraulic valve is configured to supply the discharge oil of the third pump to the boom cylinder by overcoming the biasing force of the spring by the pilot pressure of the boom switching valve.
- the discharge oil of the third pump is switched to be supplied to the arm cylinder by the pilot pressure of the arm switching valve and the biasing force of the spring.
- the resultant hydraulic valve for acceleration is the combined pressure of the pilot pressure of the arm switching valve and the biasing force of the spring.
- the present invention aims to provide a fluid pressure control device for a power shovel that eliminates the need for complicated spring selection.
- a fluid pressure control device for a power shovel, a first pump that supplies a working fluid to a first cylinder, a second pump that supplies a working fluid to a second cylinder, A first switching valve that communicates or shuts off one pump and the first cylinder, a second switching valve that communicates or shuts off the second pump and the second cylinder, and the first cylinder and the second cylinder.
- a third pump capable of supplying a working fluid, a first merging control valve for communicating or blocking the third pump and the first cylinder or the second cylinder, and the first switching valve by the first switching valve.
- FIG. 1 is a circuit diagram of a fluid pressure control device for a power shovel according to an embodiment of the present invention.
- hydraulic pressure control device 100 of a power shovel according to an embodiment of the present invention will be described.
- the fluid pressure control device 100 is a device that uses pressure oil as a working fluid, and controls the operation of each actuator mounted on a power shovel.
- the fluid pressure control device 100 includes a first pump P1 that supplies hydraulic oil to the boom cylinder 31, a second pump P2 that supplies hydraulic oil to the arm cylinder 32, and a third pump P3 that supplies hydraulic oil to the turning motor.
- a boom switching valve 1 provided between the first pump P1 and the boom cylinder 31 to communicate or block the first pump P1 and the boom cylinder 31, and between the second pump P2 and the arm cylinder 32.
- a switching valve 3 for turning which communicates or shuts off.
- the fluid pressure control device 100 further includes a first circuit system I connected to the first pump P1 and provided with the switching valve 1, and a second circuit system connected to the second pump P2 and provided with the switching valve 2. II, and a third circuit system III connected to the third pump P3 and provided with the switching valve 3.
- the first circuit system I is provided with a left switching valve 4 and a bucket switching valve 5 to which the discharge oil of the first pump P1 is supplied.
- the switching valve 1 and 5 is supplied with the discharge oil of the first pump P1 only when the traveling switching valve 4 is in the normal position (the state shown in FIG. 1).
- the discharge oil of the first pump P1 is preferentially supplied to the switching valve 4 for traveling.
- the right traveling switching valve 6 to which the discharge oil of the second pump P2 is supplied, the boom swing switching valve 7, and a spare actuator are provided.
- a switching valve 8 is provided. Also in the second circuit system II, the discharge oil of the second pump P2 is preferentially supplied to the traveling switching valve 6.
- the boom cylinder 31 corresponds to the first cylinder
- the boom switching valve 1 corresponds to the first switching valve
- the arm cylinder 32 corresponds to the second cylinder
- the arm switching valve 2 corresponds to the second switching valve.
- a switching valve 9 for the dozer to which the discharge oil of the third pump P3 is supplied a boom merging control valve 17 and an arm merging control valve 11 are provided. It is done.
- the boom merge control valve 17 corresponds to the first merge control valve
- the arm merge control valve 11 corresponds to the second merge control valve
- the center bypass passage 12 is connected to the third pump P3.
- the center bypass passage 12 is a tank passage 20 in which the oil discharged from the third pump P3 is connected to the tank T when all the valves 17, 9, 3, 11 provided in the third circuit system III are in the normal position. Lead to.
- the boom junction control valve 17 is provided downstream of the third pump P3 and upstream of the center bypass passage 12 in the third circuit system III.
- the arm merging control valve 11 is provided on the most downstream side of the center bypass passage 12 and between the boom merging control valve 17 and the arm switching valve 2.
- the arm junction control valve 11 is a discharge supplied from the third pump P3 to the center bypass passage 12 when the other switching valves 3 and 9 and the boom junction control valve 17 provided in the third circuit system III are in the normal position. This is a valve for guiding oil to the switching valve 2 for the arm.
- the arm merging control valve 11 has a pilot chamber 11a connected to an arm system pilot pressure introduction path pa for guiding a pilot pressure for switching the arm switching valve 2, and the pilot pressure is not guided to the pilot chamber 11a. Sometimes, the normal position (the state shown in FIG. 1) is maintained by the biasing force of the spring 11b as the biasing member.
- the arm junction control valve 11 is connected to an arm junction passage 13 branched from the center bypass passage 12 and parallel to the center bypass passage 12. The downstream side of the arm joining passage 13 is connected to the arm switching valve 2.
- the arm merge passage 13 is always in communication with the third pump P3 through the arm merge control valve 11.
- the arm merging passage 13 may be configured to communicate with the third pump P3 without going through the arm merging control valve 11.
- the arm merging control valve 11 is switched. At this time, if the other switching valves 3 and 9 and the boom junction control valve 17 in the third circuit system III are not switched, the discharge oil of the third pump P3 passes through the center bypass passage 12 and the arm junction passage 13 to 2 joins the oil discharged from the pump P2 and is supplied to the switching valve 2 for the arm.
- the normal position corresponds to a communication position where the third pump P3 and the tank T are communicated
- the switching position corresponds to a cutoff position where the third pump P3 and the tank T are blocked.
- the boom junction control valve 17 has a pilot chamber 17a connected to a boom system pilot pressure introduction path pb that guides a pilot pressure for switching the boom switching valve 1, and the pilot pressure is not guided to the pilot chamber 17a.
- the normal state (the state shown in FIG. 1) is maintained by the urging force of the spring 17b as the urging member.
- the third pump P3 communicates with the boom joining passage 14 and the parallel passage 15. In this switching position, the third pump P3 also communicates with the center bypass passage 12 via a throttle. However, the throttle substantially blocks communication between the third pump P3 and the center bypass passage 12.
- the normal position corresponds to a blocking position where the communication between the third pump P 3 and the boom cylinder 31 is blocked
- the switching position corresponds to a communication position where the third pump P 3 and the boom cylinder 31 are connected.
- the boom junction control valve 17 may be configured to completely block the communication between the third pump P3 and the center bypass passage 12 at the switching position.
- the communication control valve 18 is connected to the pilot chamber 17a of the boom merging control valve 17.
- the communication control valve 18 has a pilot chamber 18a connected to the arm system pilot pressure introduction path pa.
- the communication control valve 18 is maintained at the normal position (the state shown in FIG. 1) by the urging force of the spring 18b as the urging member when the pilot pressure is not applied to the pilot chamber 18a, and the pilot pressure is applied to the pilot chamber 18a. Is switched to the switching position.
- the boom system pilot pressure introduction path pb communicates with the pilot chamber 17a of the boom merging control valve 17.
- the communication between the boom system pilot pressure introduction path pb and the pilot chamber 17 a is blocked and the pilot chamber 17 a is connected to the drain passage 19.
- the arm system pilot pressure introduction path pa is a passage through which pilot pressure for switching the arm switching valve 2 is guided, and communicates with a passage connected to both pilot chambers of the arm switching valve 2.
- the boom system pilot pressure introduction path pb is a passage through which pilot pressure for switching the boom switching valve 1 is guided, and communicates with a passage connected to both pilot chambers of the boom switching valve 1.
- the third pump P3 and the center bypass passage 12 communicate with each other.
- the center bypass passage 12 communicates with the tank passage 20 and the oil discharged from the third pump P3 returns to the tank T.
- the arm switching valve 2 When the arm switching valve 2 is in the normal position, that is, when the communication between the second pump P2 and the arm cylinder 32 is interrupted, the pilot pressure is not guided to the pilot chamber 18a of the communication control valve 18. Therefore, the communication control valve 18 maintains the normal position (the state shown in FIG. 1).
- the discharge oil of the third pump P3 is also supplied to the bucket switching valve 5 connected in parallel with the boom switching valve 1 to the boom junction passage 14.
- the third pump P3 also communicates with the parallel passage 15 through the boom junction control valve 17. Accordingly, the oil discharged from the third pump P3 merges with the oil discharged from the second pump P2 through the parallel passage 15, and is also supplied to the auxiliary switching valve 8 and the boom swing switching valve 7.
- the boom junction control valve 17 When the boom is operated in a state where the arm is not operated, the boom junction control valve 17 is switched to the switching position, and the discharge oil of the third pump P3 is supplied to the boom switching valve 1.
- the pilot pressure in the arm system pilot pressure introduction path pa acts on the pilot chamber 18a of the communication control valve 18, and the communication control valve 18 is switched from the normal position to the left side in the figure. Switch to position.
- the switching operation of the boom switching valve 1, that is, the first pump P1 and the boom cylinder 31 Regardless of whether or not is communicated, communication between the third pump P3 and the boom junction passage 14 is blocked. That is, the merged discharge oil discharged from the third pump P ⁇ b> 3 is preferentially supplied to the arm cylinder 32 rather than the boom cylinder 31. Therefore, even when the boom switching valve 1 is switched when the discharge oil of the third pump P3 is joined to the arm switching valve 2, the flow rate supplied to the arm cylinder 32 is reduced by the switching. There is no end to it. Therefore, for example, in a power shovel, it is possible to perform control suitable for work for which the arm speed is desired to be increased, such as horizontal pulling work.
- the communication control valve 18 is switched only by the pilot pressure in the arm system pilot pressure introduction passage pa, it is not necessary to select a spring that satisfies a predetermined relationship with the pilot pressure as in the conventional control circuit.
- the discharge oil of the third pump can be preferentially supplied to the arm cylinder 32 only by switching the arm switching valve 2.
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Abstract
Description
Claims (6)
- パワーショベルの流体圧制御装置であって、
第1シリンダに作動流体を供給する第1ポンプと、
第2シリンダに作動流体を供給する第2ポンプと、
前記第1ポンプと前記第1シリンダとを連通又は遮断する第1切換弁と、
前記第2ポンプと前記第2シリンダとを連通又は遮断する第2切換弁と、
前記第1シリンダ及び前記第2シリンダに作動流体を供給可能な第3ポンプと、
前記第3ポンプと前記第1シリンダ又は前記第2シリンダとを連通又は遮断する第1合流制御弁と、
前記第1切換弁によって前記第1ポンプと前記第1シリンダとが連通されるか否かにかかわらず前記第2切換弁によって前記第2ポンプと前記第2シリンダとが連通された場合に、前記第1合流制御弁を制御することによって、前記第3ポンプと前記第1シリンダとを遮断して前記第3ポンプが吐出する作動流体を前記第2シリンダに導く連通制御弁と、
を備えるパワーショベルの流体圧制御装置。 - 請求項1に記載のパワーショベルの流体圧制御装置であって、
前記第1合流制御弁は、
付勢部材の付勢力によって、前記第3ポンプと前記第1シリンダとを遮断する遮断位置に切り換わり、
パイロット室に前記第1切換弁を切り換えるためのパイロット圧が導かれることによって、前記第3ポンプと前記第1シリンダとを連通する連通位置に切り換わる
パワーショベルの流体圧制御装置。 - 請求項2に記載のパワーショベルの流体圧制御装置であって、
前記連通制御弁は、前記第1切換弁によって前記第1ポンプと前記第1シリンダとが連通され、かつ、前記第2切換弁によって前記第2ポンプと前記第2シリンダとが遮断された場合に、前記第1切換弁を切り換えるためのパイロット圧を前記第1合流制御弁の前記パイロット室に導き、前記第1合流制御弁を前記連通位置に切り換えるパワーショベルの流体圧制御装置。 - 請求項2に記載のパワーショベルの流体圧制御装置であって、
前記連通制御弁は、
前記第2切換弁によって前記第2ポンプと前記第2シリンダとが連通された場合に、前記第1合流制御弁の前記パイロット室とタンクとを連通させるパワーショベルの流体圧制御装置。 - 請求項1に記載のパワーショベルの流体圧制御装置であって、
前記第3ポンプと前記タンクとを連通又は遮断する第2合流制御弁をさらに備え、
前記第2合流制御弁は、
付勢部材の付勢力によって、前記第3ポンプと前記タンクとを連通する連通位置に切り換わり、
パイロット室に前記第2切換弁を切り換えるためのパイロット圧が導かれることによって、前記第3ポンプと前記タンクとを遮断すると共に前記第3ポンプが吐出する作動流体を前記第2シリンダに導く遮断位置に切り換わる
パワーショベルの流体圧制御装置。 - 請求項5に記載のパワーショベルの流体圧制御装置であって、
前記第1切換弁は、前記第1ポンプと前記第1シリンダとの間に設けられ、
前記第2切換弁は、前記第2ポンプと前記第2シリンダとの間に設けられ、
前記第1合流制御弁は、前記第3ポンプの下流に設けられ、
前記第2合流制御弁は、前記第1合流制御弁と前記第2切換弁との間に設けられる
パワーショベルの流体圧制御装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020157008747A KR101716591B1 (ko) | 2012-11-07 | 2013-11-05 | 파워 셔블의 유체압 제어 장치 |
| CN201380051882.8A CN104718383B (zh) | 2012-11-07 | 2013-11-05 | 铲土机的流体压控制装置 |
| DE112013005318.7T DE112013005318B4 (de) | 2012-11-07 | 2013-11-05 | Fluiddruck-Steuervorrichtung für einen Hydraulikbagger |
| US14/433,614 US9719532B2 (en) | 2012-11-07 | 2013-11-05 | Fluid pressure control device for power shovel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012245782A JP6004900B2 (ja) | 2012-11-07 | 2012-11-07 | パワーショベルの流体圧制御装置 |
| JP2012-245782 | 2012-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014073515A1 true WO2014073515A1 (ja) | 2014-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/079852 Ceased WO2014073515A1 (ja) | 2012-11-07 | 2013-11-05 | パワーショベルの流体圧制御装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9719532B2 (ja) |
| JP (1) | JP6004900B2 (ja) |
| KR (1) | KR101716591B1 (ja) |
| CN (1) | CN104718383B (ja) |
| DE (1) | DE112013005318B4 (ja) |
| WO (1) | WO2014073515A1 (ja) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3201475B1 (en) * | 2014-09-29 | 2018-12-19 | Parker Hannifin Corporation | Directional control valve |
| KR101734641B1 (ko) | 2015-04-14 | 2017-05-11 | 현대자동차주식회사 | 차량용 충전 장치 |
| ITUB20160596A1 (it) * | 2016-02-09 | 2017-08-09 | Walvoil Spa | Valvola oleodinamica serie e parallelo con elemento logico di commutazione |
| JP6869829B2 (ja) * | 2017-06-29 | 2021-05-12 | 株式会社クボタ | 作業機の油圧システム |
| KR102559751B1 (ko) * | 2017-12-07 | 2023-07-25 | 스미토모 겐키 가부시키가이샤 | 쇼벨 |
| CN111480011B (zh) * | 2017-12-15 | 2023-03-24 | 沃尔沃建筑设备公司 | 液压机械 |
| JP6960585B2 (ja) * | 2018-12-03 | 2021-11-05 | Smc株式会社 | 流量コントローラ及びそれを備えた駆動装置 |
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| JP2012036909A (ja) * | 2010-08-03 | 2012-02-23 | Kobelco Contstruction Machinery Ltd | 建設機械の油圧回路 |
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| JP4139352B2 (ja) | 2004-05-19 | 2008-08-27 | カヤバ工業株式会社 | 油圧制御装置 |
| KR100886476B1 (ko) * | 2007-03-12 | 2009-03-05 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설기계용 유압회로 |
| JP5429098B2 (ja) * | 2010-08-03 | 2014-02-26 | コベルコ建機株式会社 | 建設機械の油圧回路 |
| US9181677B2 (en) | 2010-08-03 | 2015-11-10 | Kobelco Construction Machinery Co., Ltd. | Construction machine having hydraulic circuit |
| JP5803587B2 (ja) * | 2011-11-09 | 2015-11-04 | コベルコ建機株式会社 | 建設機械の油圧回路 |
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2012
- 2012-11-07 JP JP2012245782A patent/JP6004900B2/ja active Active
-
2013
- 2013-11-05 DE DE112013005318.7T patent/DE112013005318B4/de active Active
- 2013-11-05 KR KR1020157008747A patent/KR101716591B1/ko not_active Expired - Fee Related
- 2013-11-05 US US14/433,614 patent/US9719532B2/en active Active
- 2013-11-05 WO PCT/JP2013/079852 patent/WO2014073515A1/ja not_active Ceased
- 2013-11-05 CN CN201380051882.8A patent/CN104718383B/zh active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS54164391U (ja) * | 1978-05-11 | 1979-11-17 | ||
| JP2005121043A (ja) * | 2003-10-14 | 2005-05-12 | Nabtesco Corp | 油圧回路及びその合流弁 |
| JP2006328765A (ja) * | 2005-05-25 | 2006-12-07 | Kobelco Contstruction Machinery Ltd | 油圧ショベルの油圧供給装置 |
| JP2012036909A (ja) * | 2010-08-03 | 2012-02-23 | Kobelco Contstruction Machinery Ltd | 建設機械の油圧回路 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150052289A (ko) | 2015-05-13 |
| US9719532B2 (en) | 2017-08-01 |
| CN104718383B (zh) | 2017-08-18 |
| CN104718383A (zh) | 2015-06-17 |
| KR101716591B1 (ko) | 2017-03-14 |
| DE112013005318T5 (de) | 2015-07-16 |
| JP2014095398A (ja) | 2014-05-22 |
| US20150330416A1 (en) | 2015-11-19 |
| JP6004900B2 (ja) | 2016-10-12 |
| DE112013005318B4 (de) | 2019-06-13 |
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