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公开(公告)号：EP4424929A1
公开(公告)日：2024-09-04
申请号：EP22887135.6
申请日：2022-10-27
发明人： NISHIKAWARA, Riichi
摘要： An excavator (100) includes a lower travelling body (1), an upper rotating body (3) mounted on the lower travelling body (1), an excavation attachment attached to the upper rotating body (3) and including a boom (4), an arm (5), and a bucket (6), a control valve (170) serving as a straight-travel valve, and a controller (30) that is capable of controlling functioning of the control valve (170). The controller (30) moves the control valve (170) while at least two selected from the boom (4), the arm (5), and the bucket (6) are moving simultaneously in a non-travelling state.
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公开(公告)号：EP3203086B1
公开(公告)日：2018-12-05
申请号：EP17162921.5
申请日：2013-03-06
发明人： HASHIMOTO, Hirofumi
CPC分类号： E02F9/2228 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/16 , F15B13/0402 , F15B2211/20576 , F15B2211/30525 , F15B2211/30565 , F15B2211/3116 , F15B2211/31582 , F15B2211/41554 , F15B2211/45 , F15B2211/7135 , F15B2211/7142 , F15B2211/78 , F15B2211/781
摘要： A hydraulic circuit for a construction machine including a direction control valve group having multiple direction control valves that are provided in tandem to a center bypass passage of the construction machine, and a bleed-off valve provided to the center bypass passage downstream of the direction control valve group. The direction control valve includes a first internal passage that flows out pressure oil supplied to the direction control valve to the center bypass passage, and a second internal passage that supplies the pressure oil to a hydraulic actuator of the construction machine. The first internal passage causes pressure oil discharged from the hydraulic pump to flow out to the center bypass passage downstream of the direction control valve, so that the center bypass passage and the first internal passage form a parallel passage. The bleed-off valve performs bleed-off control on pressure oil supplied by way of the parallel passage by changing an opening area of the bleed-off valve.
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公开(公告)号：EP3315792A1
公开(公告)日：2018-05-02
申请号：EP16814100.0
申请日：2016-05-30
IPC分类号： F15B11/024 , F15B11/02
CPC分类号： F15B11/024 , F15B11/02 , F15B11/10 , F15B13/0401 , F15B2013/041 , F15B2211/6313 , F15B2211/6653 , F15B2211/7054
摘要： Provided is a hydraulic drive device, wherein the hydraulic drive device is provided with: a cylinder (101); a rod (103); a piston (102); a hydraulic pump (107); a tank (113); a valve (106) that can be switched between a positive state of connecting the hydraulic pump (107) and a head chamber (101h) and connecting a rod chamber (101r) and the tank (113), and a negative state of connecting the hydraulic pump (107) and the rod chamber (101r) and connecting the head chamber (101h) and the tank (113); and a confluence channel (114) at which, when the valve (106) is in the positive state, at least a portion of hydraulic oil going from the rod chamber (101r) to the tank (113) is merged into hydraulic oil going from the hydraulic pump (107) to the head chamber (101h).
摘要翻译： 本发明提供一种液压驱动装置，其中液压驱动装置具备：缸体（101）; 杆（103）; 活塞（102）; 一个液压泵（107）; 一个罐（113）; 能够在连接液压泵107和头部室101h并且连接杆室101r和罐113的正状态与连接该液压泵107的负状态之间切换的阀106， 液压泵107和杆腔101r连接，并连接头腔101h和罐113; 和合流通道（114），当阀（106）处于正压状态时，至少一部分从杆腔（101r）流向油箱（113）的液压油合并成从 液压泵（107）连接到头室（101h）。
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公开(公告)号：EP3279482A1
公开(公告)日：2018-02-07
申请号：EP15887677.1
申请日：2015-04-03
IPC分类号： F15B11/02
CPC分类号： F15B11/17 , E02F9/2221 , E02F9/2235 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B2211/20576 , F15B2211/2654 , F15B2211/30595 , F15B2211/6346 , F15B2211/6652 , F15B2211/6654 , F15B2211/7142 , F15B2211/75
摘要： To provide a hydraulic control system for a working machine with high fuel efficiency and higher versatility to be capable of being adapted to special work. The hydraulic control system for the working machine according to the present invention includes: a plurality of directional control valves (31, 32, ...), more than one of which is connected in parallel to each of a plurality of hydraulic pumps (11, 12, 13) to supply hydraulic oil from the hydraulic pump to each of the corresponding actuators (4, 5, 6, 50); operating devices (110, 120, 130, 140) to which an operator inputs manipulated variables; a connection map (182) storing a precedence order for connection between a plurality of hydraulic pumps and a plurality of directional control valves; and a controller (100) controlling the connection conditions of the pumps and the actuators on the basis of the connection a¥map and operation signals.
摘要翻译： 为具有高燃油效率和更高通用性的工作机器提供液压控制系统，以适应特殊工作。 根据本发明的用于工作机械的液压控制系统包括：多个方向控制阀（31,32，...），其多于一个方向控制阀并联连接到多个液压泵（11 ，12,13），用于将来自液压泵的液压油供给到相应的致动器（4,5,6,50）中的每一个; 操作者输入操作变量的操作装置（110,120,130,140） 存储用于多个液压泵与多个方向控制阀之间的连接的优先顺序的连接图（182） 以及基于连接图和操作信号控制泵和致动器的连接状态的控制器（100）。
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公开(公告)号：EP3252237A1
公开(公告)日：2017-12-06
申请号：EP15880192.8
申请日：2015-01-27
发明人： LEE, Sang Hee , LEE, Eun Byeol
CPC分类号： E02F9/2267 , E02F9/20 , E02F9/22 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F15B11/02 , F15B11/0423 , F15B2211/20546 , F15B2211/6316 , F15B2211/6654
摘要： The present invention provides a hydraulic control system comprising: a flow rate control valve; a variable displacement hydraulic pump which is connected to the flow rate control valve and discharges hydraulic pressure to the flow rate control valve; a pump discharge pressure detector which is installed in a section where the flow rate control valve and the variable displacement hydraulic pump are connected, and detects the discharge pressure of the hydraulic pressure discharged from the variable displacement hydraulic pump to the flow rate control valve; and a hydraulic controller comprising a detection unit which is connected to the pump discharge pressure detector, detects the discharge pressure of the variable displacement hydraulic pump and converts the discharge pressure to a pump discharge pressure value, a comparison unit which receives the pump discharge pressure value from the detection unit, compares the pump discharge pressure value with a pre-stored lowest recognition pressure value, and determines whether the pump discharge pressure value is greater or less than the lowest recognition pressure value, and a calculation unit which, by interworking with the comparison unit, if the pump discharge pressure value is less than the lowest recognition pressure value, calculates a control pressure by recognizing the control pressure of the variable displacement hydraulic pump as the lowest recognition pressure value.
摘要翻译： 本发明提供了一种液压控制系统，包括：流量控制阀; 可变容量型液压泵，其与所述流量控制阀连接并向所述流量控制阀排出液压; 泵排出压力检测器，其设置在连接有所述流量控制阀和所述可变容量型液压泵的部分，并检测从所述可变容量型液压泵向所述流量控制阀排出的所述液压的排出压力; 以及液压控制器，该液压控制器包括检测单元，该检测单元连接到泵排出压力检测器，检测可变排量液压泵的排出压力并将排出压力转换成泵排出压力值;比较单元，其接收泵排出压力值 从检测单元将泵排出压力值与预先存储的最低识别压力值进行比较，并且确定泵排出压力值是大于还是小于最小识别压力值;以及计算单元，通过与 比较单元，如果泵排放压力值小于最低识别压力值，则通过将可变排量液压泵的控制压力识别为最低识别压力值来计算控制压力。
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公开(公告)号：EP3219857A4
公开(公告)日：2017-11-22
申请号：EP15858834
申请日：2015-11-10
发明人： YUZAWA YOSHIMITSU
CPC分类号： E02F9/22 , E02F3/413 , E02F9/2235 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/042 , F15B11/08 , F16D31/02 , F16D31/08
摘要： An grapple (6), an arm (5) that supports the grapple (6), a boom (6) that supports the arm (5), an upper revolving body (3) that supports the boom (6), a lower traveling body (1) that mounts the upper revolving body (3) in a rotatable state, a main pump (14L) that supplies a hydraulic oil to a grapple opening/closing cylinder (10), a pressure sensor (S2L) that detects a discharge pressure of the main pump (14L), a controller (30) that reduces a flow rate of the hydraulic oil toward the grapple opening/closing cylinder (10) from the main pump (14L) when the discharge pressure detected by the pressure sensor (S2L) exceeds a predetermined pressure (TH1), are included.
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公开(公告)号：EP3196482A2
公开(公告)日：2017-07-26
申请号：EP16203985.3
申请日：2016-12-14
CPC分类号： F15B13/0401 , A01B63/10 , A01B63/1013 , A01C7/205 , F15B11/02 , F15B11/05 , F15B11/055 , F15B11/08 , F15B13/0417 , F15B13/044 , F15B2211/20538 , F15B2211/20546 , F15B2211/25 , F15B2211/253 , F15B2211/3144 , F15B2211/329 , F15B2211/50554 , F15B2211/7128
摘要： In one aspect, a system for controlling the supply of hydraulic fluid to an implement of a work vehicle may generally include a pump, a control valve coupled to the pump and first and second fluid lines provided in flow communication with output ports of the control valve. The system may also include a pressure control valve provided in flow communication with the second fluid line that is configured to regulate a fluid pressure of the hydraulic fluid being supplied to a hydraulic cylinder of the implement. Additionally, the system may include a bypass fluid line configured to provide a flow path for hydraulic fluid between the pump and the second fluid line that is independent of the control valve and a load sensing line configured to provide an indication of the fluid pressure of the hydraulic fluid being supplied to the hydraulic cylinder.
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公开(公告)号：EP2863066B1
公开(公告)日：2017-05-31
申请号：EP13804191.8
申请日：2013-03-06
发明人： HASHIMOTO, Hirofumi
CPC分类号： E02F9/2228 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/16 , F15B13/0402 , F15B2211/20576 , F15B2211/30525 , F15B2211/30565 , F15B2211/3116 , F15B2211/31582 , F15B2211/41554 , F15B2211/45 , F15B2211/7135 , F15B2211/7142 , F15B2211/78 , F15B2211/781
摘要： A hydraulic circuit for a construction machine including a direction control valve group having multiple direction control valves that are provided in tandem to a center bypass passage of the construction machine, and a bleed-off valve provided to the center bypass passage downstream of the direction control valve group. The direction control valve includes a first internal passage that flows out pressure oil supplied to the direction control valve to the center bypass passage, and a second internal passage that supplies the pressure oil to a hydraulic actuator of the construction machine. The first internal passage causes pressure oil discharged from the hydraulic pump to flow out to the center bypass passage downstream of the direction control valve, so that the center bypass passage and the first internal passage form a parallel passage. The bleed-off valve performs bleed-off control on pressure oil supplied by way of the parallel passage by changing an opening area of the bleed-off valve.
摘要翻译： 本发明提供一种建筑机械的液压回路，该液压回路具备方向控制阀组，该方向控制阀组具有与工程机械的中心旁通通路串联设置的多个方向控制阀以及设置于该方向控制下游的中心旁通通路的排出阀 阀组。 方向控制阀包括将供给至方向控制阀的压力油向中心旁通通路流出的第一内部通路以及将压力油供给至建筑机械的液压致动器的第二内部通路。 第一内部通道使从液压泵排出的压力油流出到方向控制阀下游的中心旁路通道，使得中心旁路通道和第一内部通道形成平行通道。 泄放阀通过改变泄放阀的开口面积对通过平行通道供给的压力油执行泄放控制。
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公开(公告)号：EP2828520B1
公开(公告)日：2016-03-02
申请号：EP13715290.6
申请日：2013-03-08
申请人： Hydro Leduc
发明人： POREL, François
CPC分类号： F15B11/02 , F03C1/0642 , F03C1/14 , F04B1/24 , F15B11/15 , F15B2211/30505
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公开(公告)号：EP2808563A1
公开(公告)日：2014-12-03
申请号：EP13741345.6
申请日：2013-01-21
CPC分类号： F15B21/14 , E02F9/2095 , E02F9/2217 , E02F9/2242 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/17 , F15B2211/20576 , F15B2211/61 , F15B2211/88
摘要： A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branching off, first and second logic valves, and a switching valve. The switching valve switches between a state where the assist pump is connected to the second supply passage and a state where the second main pump is connected to the hydraulic motor. The hybrid construction machine includes a bypass passage branching off from the other branch passage at the downstream of the switching valve. The bypass passage is connected to the second supply passage on the downstream side of the second logic valve.
摘要翻译： 一种混合动力式工程机械，其特征在于，具备：第一主泵和第二主泵;第一供给通路和第二供给通路;第一回路系统和第二回路系统;液压马达;电动发电机;辅助泵;与辅助泵连接并分支的连接通路; 逻辑阀和开关阀。 切换阀在辅助泵连接到第二供给通路的状态和第二主泵连接到液压马达的状态之间切换。 混合动力工程机械具有在切换阀的下游侧与另一方的分支通路分支的旁路通路。 旁路通道连接到第二逻辑阀下游侧的第二供应通道。
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