WO2016167128A1 - 流体圧制御装置 - Google Patents
流体圧制御装置 Download PDFInfo
- Publication number
- WO2016167128A1 WO2016167128A1 PCT/JP2016/060490 JP2016060490W WO2016167128A1 WO 2016167128 A1 WO2016167128 A1 WO 2016167128A1 JP 2016060490 W JP2016060490 W JP 2016060490W WO 2016167128 A1 WO2016167128 A1 WO 2016167128A1
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- WO
- WIPO (PCT)
- Prior art keywords
- neutral
- valve
- control valve
- passage
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
- E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
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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
-
- 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
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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
-
- 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
- E02F9/2282—Systems using center bypass type changeover valves
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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
- E02F9/2292—Systems with two or more pumps
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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
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/003—Housing formed from a plurality of the same valve elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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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
- F15B2211/20576—Systems with pumps with multiple pumps
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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
-
- 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
- F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
-
- 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
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
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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
- F15B2211/45—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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/61—Secondary circuits
- F15B2211/611—Diverting circuits, e.g. for cooling or filtering
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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
- Y10T137/85978—With pump
- Y10T137/86131—Plural
- Y10T137/86163—Parallel
-
- 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
- Y10T137/877—With flow control means for branched passages
- Y10T137/87877—Single inlet with multiple distinctly valved outlets
-
- 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
- Y10T137/877—With flow control means for branched passages
- Y10T137/87885—Sectional block structure
Definitions
- the present invention relates to a fluid pressure control device used for a working machine.
- JP2002-181008A includes a hydraulic control in which a first circuit system including a plurality of spool valves connected to a first pump and a second circuit system including a plurality of spool valves connected to a second pump are incorporated in a valve block.
- a device invention is described.
- the first circuit system is provided with a merging switching valve for blocking the neutral passage. By switching this junction switching valve and disconnecting the neutral passage from the tank, the first circuit system is joined to the arm switching valve of the second circuit system through the junction passage provided upstream of the junction switching valve. I am letting.
- the present invention has been made in view of the above problems, and a fluid pressure control device that can be used as appropriate for purposes other than joining the hydraulic oil from the first circuit system to a specific actuator of the second circuit system.
- the purpose is to provide.
- the fluid pressure control device controls the actuator connected to the second pump and the first circuit system having at least one first control valve connected to the first pump and controlling the actuator.
- a second circuit system having at least one second control valve, wherein the first circuit system first returns the working fluid of the first pump to the tank when all the first control valves are in the neutral position.
- a neutral passage a neutral cut valve that is provided downstream of the first control valve in the first neutral passage and communicates or blocks the connection between the first neutral passage and the tank; and downstream of the first control valve in the first neutral passage.
- an external output port communicating with the upstream of the neutral cut valve and capable of supplying the working fluid discharged from the first pump to the outside.
- FIG. 1 is a circuit diagram showing a fluid pressure control device according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a neutral cut valve in the fluid pressure control apparatus according to the embodiment of the present invention.
- FIG. 3 is a circuit diagram showing a modification of the fluid pressure control device according to the embodiment of the present invention.
- FIG. 4 is a cross-sectional view showing a neutral cut valve in a modification of the fluid pressure control device according to the embodiment of the present invention.
- FIG. 1 is a circuit diagram showing a fluid pressure control device 100 in the present embodiment.
- the fluid pressure control device 100 is used in a working machine such as a power shovel.
- a working machine such as a power shovel
- the fluid pressure control device 100 can also be applied to other working machines such as a wheel loader.
- hydraulic oil is used as the working fluid, but other fluids such as hydraulic water may be used as the working fluid.
- the fluid pressure control apparatus 100 includes a first circuit system 10 connected to the first pump P1 and supplied with hydraulic oil from the first pump P1, and a second pump P2 connected to the second pump P2. And a second circuit system 20 to which hydraulic oil is supplied.
- the first circuit system 10 includes a first neutral passage 11 that guides hydraulic oil supplied from the first pump P1 to the tank T, a plurality of control valves 121 to 125 connected in series to the first neutral passage 11, And a first parallel passage 13 branched from the first neutral passage 11 upstream of the valves 121 to 125.
- the control valves 121 to 125 are connected in series by the first neutral passage 11 and are connected in parallel by the first parallel passage 13.
- the hydraulic oil discharged from the first pump P1 is, in order from the upstream side, the first traveling control valve 121, the spare control valve 122, the turning control valve 123, the first boom control valve 124, and the first arm. Guided to the control valve 125.
- the first travel control valve 121 controls supply and discharge of hydraulic oil to and from a travel motor provided on the left side of the vehicle body of a power shovel (not shown).
- the spare control valve 122 controls supply / discharge of hydraulic oil to / from an actuator that drives an attachment such as a breaker or a crusher attached instead of the bucket.
- the turning control valve 123 controls the supply and discharge of the hydraulic oil to and from the turning motor that turns the turning body disposed at the upper part of the vehicle body.
- the first boom control valve 124 controls supply / discharge of hydraulic oil to / from an actuator that drives the boom.
- the first arm control valve 125 controls supply / discharge of hydraulic oil to / from an actuator that drives the arm. Note that the control valves 121 to 125 correspond to first control valves.
- the first pump The hydraulic oil supplied from P1 can be supplied to the control valves 122 to 125 through the first parallel passage 13.
- the first circuit system 10 further includes a neutral cut valve 40 that is provided downstream of the control valves 121 to 125 in the first neutral passage 11 and communicates or cuts off the connection between the first neutral passage 11 and the tank T.
- the neutral cut valve 40 communicates the connection between the first neutral passage 11 and the tank T when in the A position (normal position) in FIG. 1, and when in the B position (blocking position), the neutral cut valve 40 The connection with the tank T is cut off.
- the first circuit system 10 communicates downstream of the first arm control valve 125 and upstream of the neutral cut valve 40 in the first neutral passage 11, and supplies hydraulic oil discharged from the first pump P1 to the outside.
- a possible branch passage 67 is further provided.
- the second circuit system 20 includes a second neutral passage 21 that guides hydraulic oil supplied from the second pump P2 to the tank T, a plurality of control valves 221 to 224 connected in series to the second neutral passage 21, And a second parallel passage 23 branched from the second neutral passage 21 upstream of the valves 221 to 224.
- the control valves 221 to 224 are connected in series by the second neutral passage 21 and are connected in parallel by the second parallel passage 23.
- the hydraulic oil discharged from the second pump P2 is guided to the second traveling control valve 221, the bucket control valve 222, the second boom control valve 223, and the second arm control valve 224 in order from the upstream side. .
- the second travel control valve 221 controls supply and discharge of hydraulic oil to and from a travel motor provided on the right side of the vehicle body of a power shovel (not shown).
- the bucket control valve 222 controls supply and discharge of hydraulic oil to and from an actuator that drives the bucket.
- the second boom control valve 223 controls the supply and discharge of hydraulic oil to and from the actuator that drives the boom.
- the second arm control valve 224 controls supply and discharge of hydraulic oil to and from an actuator that drives the arm. Note that the control valves 221 to 224 correspond to second control valves.
- the second pump The hydraulic oil supplied from P2 can be supplied to the control valves 222 to 224 through the second parallel passage 23.
- the second circuit system 20 is provided downstream of the external input passage 28 connected to the second parallel passage 23 upstream of the bucket control valve 222 and the second arm control valve 224 in the second neutral passage 21.
- 2 further includes a neutral cut valve 24 for communicating or blocking the connection between the neutral passage 21 and the tank T.
- An external input port 29 that opens to the outer surface of the fluid pressure control device 100 is formed in the external input passage 28.
- the neutral cut valve 24 has the same configuration as the neutral cut valve 40.
- the second circuit system 20 communicates in the second neutral passage 21 downstream of the second arm control valve 224 and upstream of the neutral cut valve 24, and supplies hydraulic oil discharged from the second pump P2 to the outside.
- a possible branch passage 27 is further provided.
- the second circuit system 20 further includes a straight travel control valve 25 connected downstream of the branch point of the second neutral passage 21 with the second parallel passage 23 and upstream of the second travel control valve 221.
- the first parallel passage 13 is connected to the straight travel control valve 25.
- the first parallel passage 13 is connected to the first parallel upstream passage 13a that connects the first pump P1 and the straight travel control valve 25, and the first parallel passage that connects the straight travel control valve 25 and the control valves 122 to 125.
- a downstream passage 13b is a downstream passage 13b.
- the travel straight travel control valve 25 is switched between two positions, a normal position C shown on the right side of FIG. 1 and a travel straight travel position D shown on the left side of FIG.
- the straight travel control valve 25 is switched to the straight travel position D when hydraulic oil is supplied to the pilot chamber 25a.
- the straight traveling control valve 25 is maintained at the normal position C by the urging force of the spring 25c.
- the first parallel upstream passage 13a of the first parallel passage 13 is connected to the first parallel downstream passage 13b of the first parallel passage 13, and the second neutral passage 21 is connected to the second pump P2. Is done.
- the hydraulic oil discharged from the first pump P1 is supplied to the control valves 121 to 125 through the first neutral passage 11 and the first parallel passage 13.
- the hydraulic fluid discharged from the second pump P2 is supplied to the control valves 221 to 224 through the second neutral passage 21 and the second parallel passage 23. That is, when only the travel motor is operated, the hydraulic fluid discharged from the first pump P1 is supplied to the first travel control valve 121, and the second travel control valve 221 is supplied from the second pump P2. The discharged hydraulic oil is supplied.
- the first parallel upstream passage 13a of the first parallel passage 13 is connected to the second neutral passage 21 downstream of the travel straight travel control valve 25, and the first parallel downstream passage 13b is the first parallel passage 13b.
- Two pumps P2 are connected. That is, when the travel motor and the actuator other than the travel motor are operated simultaneously, the hydraulic fluid discharged from the first pump P1 is supplied to the first travel control valve 121 and the second travel control valve 221. The hydraulic oil discharged from the second pump P2 is supplied to the control valves 122 to 125 and the other control valves 222 to 224. Therefore, at the straight travel position D, even if the travel motor and the actuator other than the travel motor are operated simultaneously, the travel motor circuit and the actuator circuit other than the travel motor are independent. Is secured.
- FIG. 2 is a cross-sectional view showing a cross section when the neutral cut valve 40 is at the A position (normal position).
- the fluid pressure control apparatus 100 forms a main body by laminating a plurality of valve blocks and tightening them by sandwiching them with bolts or the like.
- the fluid pressure control device 100 may be formed by a single valve block.
- the neutral cut valve 40 cuts off or communicates the connection between the valve block 60 having the bottomed cylindrical accommodation hole 61 and the first neutral passage 11 and the tank T which is accommodated in the accommodation hole 61.
- a spool 41 as a valve body, a drain chamber 48 defined between one end of the spool 41 and the bottom of the accommodation hole 61 and communicating with the tank T, a valve block 60 and a cap member 43 provided on the other end side of the spool 41 And a return spring 44 that is provided in the pilot pressure chamber 49 and biases the spool 41 in the direction in which the first neutral passage 11 and the tank T communicate with each other (the left direction in FIG. 2). And comprising.
- the cap member 43 is provided with a pilot port 42 for supplying and discharging pilot pressure.
- the spool 41 includes a first land portion 45 and a second land portion 46 that slide along the inner peripheral surface of the accommodation hole 61, and an annular groove formed between the first land portion 45 and the second land portion 46. 47.
- the valve block 60 includes an inflow portion 65 that communicates downstream of the first arm control valve 125, an inlet port portion 62 that is formed so as to surround the spool 41 in the accommodation hole 61, and communicates with the inflow portion 65, and the accommodation hole 61. And an outlet port portion 63 formed so as to surround the spool 41 and communicating with the tank T.
- the flow path from the inlet 65 to the outlet port 63 through the inlet port 62 forms a part of the first neutral passage 11 downstream of the first arm control valve 125.
- the valve block 60 further includes a branch passage 67 that branches from the inlet port portion 62 and guides the hydraulic oil discharged from the first pump P1 to the outside.
- An external output port 64 that opens to the outer surface of the valve block 60 is formed in the branch passage 67.
- the external output port 64 is formed with a thread portion for connecting a pipe.
- the neutral cut valve 40 In the state where the hydraulic oil is not supplied into the pilot pressure chamber 49, the neutral cut valve 40 is located in the state shown in FIG. 2, that is, the position A (normal position) in FIG. In this state, the inlet port portion 62 and the outlet port portion 63 communicate with each other through an annular groove 47 formed in the spool 41. Accordingly, the hydraulic oil that has flowed into the inlet port portion 62 from the inlet portion 65 communicating with the downstream of the first arm control valve 125 in the first neutral passage 11 returns to the tank T through the annular groove 47 and the outlet port portion 63. Is done. That is, the first neutral passage 11 and the tank T communicate with each other by switching the neutral cut valve 40 to the A position (normal position).
- the external output port 64 is always in communication with the inflow portion 65 through the inlet port portion 62.
- the neutral cut valve 40 since the inlet port portion 62 and the tank T communicate with each other as described above, the external output port 64 also communicates with the tank T through the inlet port portion 62. To do. Thereby, the hydraulic oil discharged by the first pump P1 is returned to the tank T without being supplied to the external output port 64.
- the neutral cut valve 40 is located at the B position (blocking position)
- the connection between the inlet port portion 62 and the tank T is blocked as described above. The entire amount of oil is supplied to the outside of the valve block 60 through the branch passage 67 and the external output port 64.
- the hydraulic oil discharged from the first pump P1 to the first circuit system 10 is externally supplied through the external output port 64 by switching the neutral cut valve 40 to the B position (shutoff position). Can be supplied to. Therefore, in the fluid pressure control device 100, for example, the hydraulic oil discharged from the first pump P1 to the first circuit system 10 is joined to a circuit that drives any actuator through the external output port 64, or is newly added. Can be used to drive the actuator.
- the external output port 64 and the external input port 29 are connected by the piping 30 outside the valve block 60 (see FIG. 1).
- the hydraulic oil is supplied to the pilot pressure chamber of the bucket control valve 222 that controls the supply and discharge of the hydraulic oil to and from the cylinder 22 and the pilot pressure chamber 49 of the neutral cut valve 40.
- the bucket control valve 222 receives the hydraulic oil discharged from the first pump P1 in addition to the hydraulic oil discharged from the second pump P2.
- the pipe 30, the external input port 29, and the external input passage 28 that is, the hydraulic oil discharged from the first pump P ⁇ b> 1 through the external output port 64 merges upstream of the bucket control valve 222 through the external input port 29. In this manner, the hydraulic oil supplied to the outside through the external output port 64 can be joined to a circuit that drives another actuator.
- the neutral cut valve 40 may be configured to communicate or block the connection between the first neutral passage 11 and the tank T according to the pilot pressure Pp that controls the bucket control valve 222. In this case, when the pilot pressure Pp is low, the spool 41 of the neutral cut valve 40 is maintained in a state where the connection between the first neutral passage 11 and the tank T is communicated, and when the pilot pressure Pp is high, the neutral cut valve 40 is maintained. However, the spring load of the return spring 44 may be set so that the first neutral passage 11 and the tank T are switched off.
- the cylinder 22 when the operation amount of the bucket control valve 222 is small, the cylinder 22 is driven only by the hydraulic oil discharged from the second pump P2, and when the operation amount of the bucket control valve 222 is large, the cylinder 22 is driven. Is driven by the hydraulic oil discharged from the first pump P1 in addition to the hydraulic oil discharged from the second pump P2. Therefore, the bucket can be driven at a high speed by increasing the operation amount of the bucket control valve 222.
- the neutral cut valve 40 is simply switched to the B position (blocking position).
- the external output port 64 and the external input port 29 are closed by the plug 50, and the straight travel control valve 225 is at the normal position C, as shown in FIG. It is different from the fluid pressure control device 100 shown in FIG. 1 in that it can be switched to three positions: a straight traveling position D shown on the left side and a merging position E shown on the right side of FIG.
- the positions C, D, and E of the straight travel control valve 225 are switched according to the pilot pressure supplied to the pilot chambers 225a and 225b provided at both ends of the straight travel control valve 225.
- the traveling straight travel control valve 225 assumes the normal position C by the urging force of the springs 225c provided on both sides of the traveling straight travel control valve 225.
- the straight travel control valve 225 is switched to the straight travel position D, and when the pilot pressure is supplied to the pilot chamber 225b, the straight travel control valve 225 is at the merge position E. Switch. Note that the normal position C and the straight travel position D in the straight travel control valve 225 function in the same manner as the straight travel control valve 25, and thus description thereof is omitted.
- the second neutral passage 21 upstream from the straight travel control valve 225 is connected to the second neutral passage 21 downstream, and the first parallel upstream passage 13a It is connected to the second neutral passage 21 through a junction passage 226 formed inside the straight travel control valve 225.
- the hydraulic oil of the first pump P1 and the hydraulic oil of the second pump P2 merge and are supplied to the second control valve, and more hydraulic oil can be supplied to the actuator connected to the second control valve. it can.
- the junction passage 226 formed inside the straight travel control valve 225 includes a check valve 227 that allows only the flow from the first parallel upstream passage 13a to the second neutral passage 21, and the operation in the junction passage 226.
- a throttle 228 for restricting the flow of oil is provided in this order from the upstream side. Accordingly, the hydraulic oil of the second pump P2 can be prevented from flowing to the first parallel upstream passage 13a side, and the first control valve and the second control are controlled by limiting the hydraulic oil of the first parallel upstream passage 13a.
- the combined flow rate from the first pump P1 to the second pump P2 can be adjusted and combined with the second neutral passage 21 during the combined operation with the valve.
- a pilot pressure chamber of a bucket control valve 222 that controls the supply and discharge of hydraulic oil to and from the cylinder 22 that drives the bucket, a pilot pressure chamber 49 of the neutral cut valve 40, a pilot chamber 225b of the straight travel control valve 225, Supply hydraulic oil to As a result, when the bucket control valve 222 is operated, the operation discharged from the first pump P1 in addition to the hydraulic oil discharged from the second pump P2 to the second neutral passage 21 and the second parallel passage 23. Oil is supplied through the junction passage 226 of the straight travel control valve 225. Thereby, the cylinder 22 is driven in a state in which the hydraulic oil discharged from the first pump P1 joins the hydraulic oil discharged from the second pump P2. Therefore, the bucket can be driven at a higher speed than when driven only by the hydraulic oil discharged from the second pump P2.
- the first pump P1 can be obtained simply by changing the straight travel control valve 25 to the straight travel control valve 225.
- the hydraulic oil discharged from the first circuit system 10 to the second circuit system 20 can be merged.
- the fluid pressure control apparatus 100 may be provided with a straight travel control valve 225 in advance. In this case, by not using the merging position E of the straight traveling control valve 225, it has the same function as the circuit shown in FIG. As a result, the hydraulic oil discharged from the first pump P1 to the first circuit system 10 from the outside can be joined to the second circuit system 20 using the external output port 64.
- the hydraulic oil discharged from the first pump P ⁇ b> 1 to the first neutral passage 11 of the first circuit system 10 can be taken out from the external output port 64.
- the external output port 64 can change the connection destination of piping suitably. Thereby, it can use suitably also for uses other than making the hydraulic fluid from the 1st circuit system 10 merge with the specific actuator of the 2nd circuit system 20.
- the external output port 64 is formed in the valve block 60 of the neutral cut valve 40. Since there is no cylinder port or the like in the valve block 60 of the neutral cut valve 40, a space for providing the external output port 64 can be easily secured, and piping work for the external output port 64 can be easily performed. Further, as compared with the case where a flow path from the neutral cut valve 40 to the external output port 64 is formed over a plurality of valve blocks, a seal portion is not necessary and processing can be reduced.
- the external output port 64 communicates with the inflow portion 65 through the inlet port portion 62 formed so as to surround the spool 41 in the accommodation hole 61 of the valve block 60.
- the accommodation hole 61 is used as a communication path for communicating the external output port 64 and the inflow portion 65, it is not necessary to provide this communication path separately from the accommodation hole 61. Can be made compact.
- the fluid pressure control device 100 is connected to the first pump P1 and controls at least one first control valve (first travel control valve 121, spare control valve 122, turning control valve 123, first boom control valve).
- a first circuit system 10 having a control valve 124 and a first arm control valve 125) and at least one second control valve (second traveling control valve 221 and bucket) connected to the second pump P2 and controlling the actuator.
- a second circuit system 20 having a control valve 222, a second boom control valve 223, and a second arm control valve 224), and the first circuit system 10 includes all the first control valves (for the first travel).
- the working fluid of the first pump P1 is tanked
- the first neutral passage 11 to be returned to the first neutral passage 11, and the first control valve (the first travel control valve 121, the spare control valve 122, the turning control valve 123, the first boom control valve 124, the first neutral passage 11).
- a neutral cut valve 40 provided downstream of the one-arm control valve 125) for communicating or blocking the connection between the first neutral passage 11 and the tank T, and a first control valve (first travel valve) in the first neutral passage 11
- an external output port 64 capable of supplying the working fluid discharged from the pump P1 to the outside.
- the hydraulic oil discharged from the first pump P1 can be taken out by the external output port 64.
- the neutral cut valve 40 has a valve block 60 having a receiving hole 61, and a valve body that is received in the receiving hole 61 and cuts off or communicates with the connection between the first neutral passage 11 and the tank T ( And an external output port 64 is formed in the valve block 60 of the neutral cut valve 40.
- the external output port 64 is formed in the valve block 60 of the neutral cut valve 40. Since there is no cylinder port or the like in the valve block 60 of the neutral cut valve 40, a space for providing the external output port 64 can be easily secured, and piping work for the external output port 64 can be easily performed.
- the fluid pressure control device 100 is characterized in that the external output port 64 communicates with the downstream of the first control valve (first arm control valve 125) through the accommodation hole 61.
- the receiving hole 61 is also used as a communication path for communicating the external output port 64 downstream of the first control valve (first arm control valve 125). Thereby, it is not necessary to provide a communication path for communicating the external output port 64 downstream of the first control valve (first arm control valve 125) separately from the accommodation hole 61, and the valve block 60 can be made compact.
- the fluid pressure control device 100 communicates with the valve block 60 downstream of the first control valve (first arm control valve 125), and forms an in-block neutral passage (part of the first neutral passage 11).
- a flow path from the inlet 65 to the outlet port 63 through the inlet port 62 is formed, and the external output port 64 is a neutral passage in the block (a flow from the inlet 65 to the outlet port 63 through the inlet port 62). ).
- the external output port 64 can be easily formed simply by providing a hole communicating with the neutral passage in the block formed in the valve block 60 (flow path from the inflow portion 65 to the outlet port portion 63 through the inlet port portion 62). can do.
- the second circuit system 20 uses at least one second control valve (bucket control valve 222, second boom control fluid) discharged from the first pump P ⁇ b> 1 through the external output port 64. It is characterized by having an external input port 29 for merging upstream of the control valve 223 and the second arm control valve 224).
- the working fluid discharged from the first pump P1 through the external output port 64 is externally supplied to the second control valve (the bucket control valve 222, the second boom control valve 223, the second The two-arm control valve 224) can be joined upstream.
- the neutral cut valve 40 is a pilot pressure that controls at least one second control valve (the bucket control valve 222, the second boom control valve 223, and the second arm control valve 224). According to Pp, the connection between the first neutral passage 11 and the tank T is communicated or cut off.
- the neutral cut valve 40 can be controlled according to the pilot pressure Pp that controls the second control valves (the bucket control valve 222, the second boom control valve 223, and the second arm control valve 224). . Therefore, the neutral cut valve 40 can be controlled according to the second control valve (the bucket control valve 222, the second boom control valve 223, and the second arm control valve 224).
- control valves 121 to 125 and the control valves 221 to 224 may be provided.
- the hydraulic oil from the second circuit system 20 may be joined to the first circuit system 10 using the neutral cut valve 24.
- the external input passage 28 may be provided so as to communicate with the upstream side of the second boom control valve 223 or the second arm control valve 224. Further, the external output port 64 may communicate with the first neutral passage 11 at any location as long as it is downstream of the first arm control valve 125 and upstream of the spool 41.
- the valve block 60 may be configured such that the branch passage 67 and the external output port 64 are formed in parallel with the accommodation hole 61 and communicated with the inflow portion 65.
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Abstract
Description
Claims (6)
- 第1ポンプ及び第2ポンプから供給される作動流体によって駆動される複数のアクチュエータを制御する流体圧制御装置であって、
前記第1ポンプに接続され前記アクチュエータを制御する少なくとも一つの第1制御弁を有する第1回路系統と、
前記第2ポンプに接続され前記アクチュエータを制御する少なくとも一つの第2制御弁を有する第2回路系統と、を備え、
前記第1回路系統は、
全ての前記第1制御弁が中立位置にある場合に前記第1ポンプの作動流体をタンクに還流させる第1中立通路と、
前記第1中立通路における前記第1制御弁の下流に設けられ、前記第1中立通路と前記タンクとの接続を連通または遮断する中立カット弁と、
前記第1中立通路における前記第1制御弁の下流であってかつ前記中立カット弁の上流に連通し、前記第1ポンプから吐出された作動流体を外部へ供給可能な外部出力ポートと、を有する流体圧制御装置。 - 請求項1に記載の流体圧制御装置であって、
前記中立カット弁は、収容穴を有するバルブブロックと、前記収容穴に収容され前記第1中立通路と前記タンクとの接続を遮断または連通する弁体と、を備え、
前記外部出力ポートは、前記中立カット弁の前記バルブブロックに形成される流体圧制御装置。 - 請求項2に記載の流体圧制御装置であって、
前記外部出力ポートは、前記収容穴を通じて前記第1制御弁の下流に連通する流体圧制御装置。 - 請求項2に記載の流体圧制御装置であって、
前記バルブブロックには、前記第1制御弁の下流に連通し、前記第1中立通路の一部を構成するブロック内中立通路が形成され、
前記外部出力ポートは、前記ブロック内中立通路に連通する流体圧制御装置。 - 請求項1に記載の流体圧制御装置であって、
前記第2回路系統は、前記外部出力ポートを通じて前記第1ポンプから吐出された作動流体を少なくとも一つの前記第2制御弁の上流に合流させる外部入力ポートを有する流体圧制御装置。 - 請求項1に記載の流体圧制御装置であって、
前記中立カット弁は、少なくとも一つの前記第2制御弁を制御するパイロット圧力に応じて前記第1中立通路と前記タンクとの接続を連通または遮断する流体圧制御装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201680021580.XA CN107532619B (zh) | 2015-04-15 | 2016-03-30 | 流体压控制装置 |
| EP16779919.6A EP3284953B1 (en) | 2015-04-15 | 2016-03-30 | Fluid pressure control device |
| US15/566,617 US10233614B2 (en) | 2015-04-15 | 2016-03-30 | Fluid pressure control device |
| KR1020177029982A KR102026550B1 (ko) | 2015-04-15 | 2016-03-30 | 유체압 제어 장치 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015083063A JP6491523B2 (ja) | 2015-04-15 | 2015-04-15 | 流体圧制御装置 |
| JP2015-083063 | 2015-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016167128A1 true WO2016167128A1 (ja) | 2016-10-20 |
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ID=57127248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2016/060490 Ceased WO2016167128A1 (ja) | 2015-04-15 | 2016-03-30 | 流体圧制御装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10233614B2 (ja) |
| EP (1) | EP3284953B1 (ja) |
| JP (1) | JP6491523B2 (ja) |
| KR (1) | KR102026550B1 (ja) |
| CN (1) | CN107532619B (ja) |
| WO (1) | WO2016167128A1 (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017133596A (ja) * | 2016-01-28 | 2017-08-03 | Kyb株式会社 | パイロット式切換弁 |
| JP7121642B2 (ja) * | 2018-11-20 | 2022-08-18 | Kyb株式会社 | 流体圧制御装置 |
| JP7121641B2 (ja) * | 2018-11-20 | 2022-08-18 | Kyb株式会社 | 流体圧制御装置 |
| JP7342437B2 (ja) * | 2019-06-10 | 2023-09-12 | コベルコ建機株式会社 | 作業機械 |
| JP7268504B2 (ja) * | 2019-06-28 | 2023-05-08 | コベルコ建機株式会社 | 油圧制御装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04312630A (ja) * | 1991-04-11 | 1992-11-04 | Hitachi Constr Mach Co Ltd | 建設機械の油圧回路 |
| JPH1025770A (ja) * | 1996-07-11 | 1998-01-27 | Toshiba Mach Co Ltd | 油圧制御弁装置 |
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| JPH01150202U (ja) * | 1988-04-08 | 1989-10-17 | ||
| DE68912305T2 (de) * | 1988-06-17 | 1994-05-11 | Kabushiki Kaisha Kobe Seiko Sho, Kobe, Hyogo | Fluid-steuerungsmechanismus für kraftschaufeln. |
| KR950002981B1 (ko) * | 1991-04-15 | 1995-03-29 | 히다찌 겐끼 가부시기가이샤 | 건설기계의 유압구동장치 |
| US5277027A (en) * | 1991-04-15 | 1994-01-11 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system with pressure compensting valve |
| US5366202A (en) * | 1993-07-06 | 1994-11-22 | Caterpillar Inc. | Displacement controlled hydraulic proportional valve |
| JP2002181008A (ja) | 2000-12-18 | 2002-06-26 | Kayaba Ind Co Ltd | 油圧制御装置 |
| JP3614121B2 (ja) * | 2001-08-22 | 2005-01-26 | コベルコ建機株式会社 | 建設機械の油圧装置 |
| US7614225B2 (en) * | 2006-04-18 | 2009-11-10 | Volvo Construction Equipment Holding Sweden Ab | Straight traveling hydraulic circuit |
| WO2009119705A1 (ja) * | 2008-03-26 | 2009-10-01 | カヤバ工業株式会社 | ハイブリッド建設機械の制御装置 |
| JP5172477B2 (ja) * | 2008-05-30 | 2013-03-27 | カヤバ工業株式会社 | ハイブリッド建設機械の制御装置 |
| JP5901378B2 (ja) * | 2012-03-23 | 2016-04-06 | Kyb株式会社 | 走行制御バルブ |
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2015
- 2015-04-15 JP JP2015083063A patent/JP6491523B2/ja active Active
-
2016
- 2016-03-30 CN CN201680021580.XA patent/CN107532619B/zh active Active
- 2016-03-30 KR KR1020177029982A patent/KR102026550B1/ko active Active
- 2016-03-30 US US15/566,617 patent/US10233614B2/en active Active
- 2016-03-30 WO PCT/JP2016/060490 patent/WO2016167128A1/ja not_active Ceased
- 2016-03-30 EP EP16779919.6A patent/EP3284953B1/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04312630A (ja) * | 1991-04-11 | 1992-11-04 | Hitachi Constr Mach Co Ltd | 建設機械の油圧回路 |
| JPH1025770A (ja) * | 1996-07-11 | 1998-01-27 | Toshiba Mach Co Ltd | 油圧制御弁装置 |
Non-Patent Citations (1)
| Title |
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| See also references of EP3284953A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3284953B1 (en) | 2020-04-29 |
| EP3284953A1 (en) | 2018-02-21 |
| US20180094405A1 (en) | 2018-04-05 |
| JP2016204826A (ja) | 2016-12-08 |
| KR102026550B1 (ko) | 2019-09-27 |
| CN107532619A (zh) | 2018-01-02 |
| JP6491523B2 (ja) | 2019-03-27 |
| EP3284953A4 (en) | 2019-01-09 |
| CN107532619B (zh) | 2020-01-03 |
| KR20170129849A (ko) | 2017-11-27 |
| US10233614B2 (en) | 2019-03-19 |
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