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公开(公告)号：EP3421845A1
公开(公告)日：2019-01-02
申请号：EP17898336.7
申请日：2017-03-28
发明人： KAYANE Masahiro , KODAKA Katsuaki
摘要： A wheel type hydraulic excavator 1 is provided with: an auto-cruise control condition determining section 62 that determines an auto-cruise control condition of the wheel type hydraulic excavator 1 based on an output signal of a traveling manipulated variable pressure sensor 35, an output signal of an auto-cruise switch 30, and an actual vehicle speed of the wheel type hydraulic excavator 1; a target vehicle speed changeover condition determining section 63 that determines a target vehicle speed changeover condition based on contents of a determination of the auto-cruise control condition determining section 62 and an input signal from a front manipulated variable pressure sensor 56; and a vehicle speed deviation-correction pressure calculator 67 that determines a correction pressure for the traveling manipulated variable pressure sensor 35 in a direction where a deviation of the actual vehicle speed of the wheel type hydraulic excavator 1 from a target vehicle speed for during front-combined operation reaches zero.
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公开(公告)号：EP2677180A1
公开(公告)日：2013-12-25
申请号：EP12747270.2
申请日：2012-02-09
CPC分类号： E02F9/2282 , E02F9/20 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F04B1/12 , F04B49/002 , F04B49/08 , F04B49/12 , F04B49/22 , F15B11/02
摘要： To provide a hydraulic drive system for a working machine, which can realize the assurance of good operability in normal operation and precision operation and a reduction in energy loss in the precision operation.
A controller (31) is provided with a pump delivery rate control unit (40) and a center bypass valve control unit (50). The pump delivery rate control unit (40) performs control processing to output, to a control terminal of a solenoid-operated proportional reducing valve (21), a control signal to make a displacement of a variable displacement hydraulic pump (10) smaller than a displacement corresponding to normal operation when a working element control device is in a manipulation mode considered to correspond to precision operation. The center bypass valve control unit (50) performs control processing to output, to a control terminal of a proportional solenoid valve (23), a control signal to make a center bypass valve (22) have a relatively large opening amount despite the center bypass valve (22) is in a switched state between a fully open position and a fully closed position when the working element control device is in a manipulation mode considered to correspond to the precision operation and a load pressure on a working element actuator is in a low state.摘要翻译： 提供一种用于工作机械的液压驱动系统，其可以实现在正常操作和精密操作中良好可操作性的保证以及精度操作中能量损失的降低。 控制器（31）设有泵输送速率控制单元（40）和中心旁通阀控制单元（50）。 泵输送速度控制单元（40）进行控制处理，以输出到电磁比例减压阀（21）的控制端子的控制信号，使变量液压泵（10）的位移小于 当工作元件控制装置处于被认为对应于精密操作的操作模式时，对应于正常操作的位移。 中心旁通阀控制单元（50）进行控制处理，以输出比例电磁阀（23）的控制端子，以使中心旁通阀（22）具有相对大的开度，尽管中心旁路 当工作元件控制装置处于被认为与精密操作相对应的操作模式时，阀（22）处于完全打开位置和完全关闭位置之间的转换状态，并且工作元件致动器上的负载压力处于低 州。
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3.发明公开HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE 有权HYDRAULISCHE ANTRIEBSVORRICHTUNGFÜREINE BAUMASCHINE
公开(公告)号：EP2636910A1
公开(公告)日：2013-09-11
申请号：EP11837981.7
申请日：2011-10-31
IPC分类号： F15B21/04 , E02F9/22 , F15B11/028
CPC分类号： E02F9/2217 , E02F9/225 , E02F9/226 , F15B21/041 , F15B2211/30505 , F15B2211/50518 , F15B2211/615 , F15B2211/625
摘要： [Problem] To permit guiding oil of a high pressure in an oil passage section, which communicates a valve device and a filter to each other, to a relief valve by a relatively inexpensive structure even when clogging occurs in a filter arranged in an oil passage communicating the valve device and the relief valve to each other.
[Solution] A hydraulic pump (20) and a charge valve (25), to which pressure oil is fed from the hydraulic pump (20) via an oil passage (26), are arranged. Arranged in the charge valve (25) are a valve device, for example, an on/off valve (33) switchable according to pressure oil delivered from the hydraulic pump (20), a relief valve (34) specifying a maximum of switching pressure for the on/off valve (33), and a filter (36) arranged in an oil passage (35) communicating the on/off valve (33) and the relief valve (34) to each other. In the oil passage (35), a check valve (37) is arranged in parallel with the filter (36) such that a flow of pressure oil from a side of the on/off valve (33) toward a side of the relief valve (34) is allowed but a flow of pressure oil from the side of the relief valve (34) toward the side of the on/off valve (33) is prevented.摘要翻译： [问题]即使在布置在油路中的过滤器中发生堵塞，也可以通过相对廉价的结构将使阀装置和过滤器彼此连通的油路部中的高压导向油 将阀装置和安全阀彼此连通。 [解决方案]设置有液压泵（20）和充气阀（25），压力油经由油路（26）从液压泵（20）进给。 配置在充气阀（25）中的阀装置是例如根据从液压泵（20）输送的压力油可切换的开/关阀（33）的阀装置，指定最大切换压力的安全阀（34） 用于开/关阀（33）和布置在使通/断阀（33）和安全阀（34）彼此连通的油通道（35）中的过滤器（36）。 在油路（35）中，止回阀（37）与过滤器（36）平行配置，使得从开/关阀（33）侧朝向安全阀一侧的压力油流 （34），并且防止从安全阀（34）侧向开/关阀（33）侧的压力油的流动。
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公开(公告)号：EP3832031A1
公开(公告)日：2021-06-09
申请号：EP19920521.2
申请日：2019-12-12
IPC分类号： E02F9/22 , F15B11/00 , F15B11/042 , F15B11/08
摘要： A hydraulic excavator is provided which can suppress the fuel consumption amount and improve the work efficiency by reducing the hydraulic pressure loss generated when a plurality of hydraulic actuators different in load are operated simultaneously. The hydraulic excavator includes a center bypass flow control valve that is arranged at the most downstream of a center bypass line and limits the flow rate of hydraulic fluid passing through the center bypass line in response to the operation amount of the second operation device in a case where a second operation device is operated, and a spool stroke limitation device that, in a case where a first operation device and the second operation device are operated simultaneously, limits the spool stroke amount of a second directional control valve in response to the operation amount of the first operation device in a state in which the spool stroke amount of a third directional control valve is controlled in response to the operation amount of the second operation device.
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公开(公告)号：EP2666683B1
公开(公告)日：2020-01-01
申请号：EP12736064.2
申请日：2012-01-19
发明人： KAYANE Masahiro , KODAKA Katsuaki
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公开(公告)号：EP2636910B1
公开(公告)日：2018-06-20
申请号：EP11837981.7
申请日：2011-10-31
IPC分类号： F15B21/04 , E02F9/22 , F15B11/028 , B01D35/147
CPC分类号： E02F9/2217 , E02F9/225 , E02F9/226 , F15B21/041 , F15B2211/30505 , F15B2211/50518 , F15B2211/615 , F15B2211/625
摘要： [Problem] To permit guiding oil of a high pressure in an oil passage section, which communicates a valve device and a filter to each other, to a relief valve by a relatively inexpensive structure even when clogging occurs in a filter arranged in an oil passage communicating the valve device and the relief valve to each other. [Solution] A hydraulic pump (20) and a charge valve (25), to which pressure oil is fed from the hydraulic pump (20) via an oil passage (26), are arranged. Arranged in the charge valve (25) are a valve device, for example, an on/off valve (33) switchable according to pressure oil delivered from the hydraulic pump (20), a relief valve (34) specifying a maximum of switching pressure for the on/off valve (33), and a filter (36) arranged in an oil passage (35) communicating the on/off valve (33) and the relief valve (34) to each other. In the oil passage (35), a check valve (37) is arranged in parallel with the filter (36) such that a flow of pressure oil from a side of the on/off valve (33) toward a side of the relief valve (34) is allowed but a flow of pressure oil from the side of the relief valve (34) toward the side of the on/off valve (33) is prevented.
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7.发明公开
公开(公告)号：EP2666683A1
公开(公告)日：2013-11-27
申请号：EP12736064.2
申请日：2012-01-19
发明人： KAYANE Masahiro , KODAKA Katsuaki
摘要： A hydraulic drive system is provided for a wheeled working machine such that, when making a hill start, the wheeled working machine is allowed to start without rolling down a hill road. The hydraulic drive system is provided with a selector switch (26) capable of selecting a work brake mode which is a temporary stop mode for a travel base (3) to be performed upon conducting work by working equipment (5), a proportional solenoid valve (27) capable of controlling a braking directional control valve (25), and a controller (28) capable of outputting a brake actuation signal (S1) or brake release signal (S2) to the proportional solenoid valve (27) responsive to a signal outputted from a brake control amount-determining pressure sensor (24). The controller (28) includes a delay means for introducing a time delay into the brake release signal (S2) responsive to a signal outputted from a travel control amount-determining pressure sensor (18), and performs processing such that the brake release signal (S2) as delayed by the delay means is outputted to the proportional solenoid valve (27).
摘要翻译： 为轮式加工机提供液压驱动系统，使山地起步时，轮式作业机可以起动，而不用沿着山路行驶。 液压驱动系统设置有选择开关（26），该开关能够选择作业用工具（5）进行作业时执行的行驶基座（3）的临时停止模式的作业制动模式，比例电磁阀 （27），能够控制制动方向控制阀（25），以及控制器（28），其能够响应于信号而向比例电磁阀（27）输出制动致动信号（S1）或制动释放信号（S2） 从制动控制量决定压力传感器（24）输出。 控制器（28）包括延迟装置，用于响应于从行驶控制量确定压力传感器（18）输出的信号将时间延迟引入到制动器释放信号（S2）中，并执行使制动释放信号 S2）输出到比例电磁阀（27）。
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