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1. 发明公开

EP0638690A1 HYDRAULIC DRIVING DEVICE FOR A CONSTRUCTION MACHINE 有权
标题翻译： HYDRAULISCHE STEUERUNGSVORRICHTUNGFÜRBAUMASCHINEN。
公开(公告)号：EP0638690A1
公开(公告)日：1995-02-15
申请号：EP94906361.4
申请日：1994-02-09
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： AOYAGI, Yukio , OTSUBO, Kazuhiko , YASUDA, Gen , FUJITA, Koji , YAMAKAWA, Takayuki , NARITA, Kazuyoshi
IPC分类号： E02F3/43
CPC分类号： E02F9/226 , E02F9/2217 , E02F9/2246
摘要： When an engine (1) is in a driven state, a control device (25) outputs an opening driving signal so as to put an on-off valve (23) in an open state, and when operation levers (68 and so forth) are operated, the pressure oil of an auxiliary hydraulic pump (7) is supplied to the driving portions of switching valves (8-16) via a pressure reducing valve for switching. This regulates the flow rate and direction of the pressure oil from main hydraulic pumps (3, 4) and actuators (57A, 57B, 57C, 56A, 54) can be operated at a speed corresponding to the amount of the operation. When driving the actuators (57A, 57B, 57C, 56A, 54) while the engine (1) is in a non-driven state and if an opening command is selected by means of a selection command device (24), the control device (25) outputs an opening driving signal to cause the on-off valve (23) to open a pipe line connecting an accumulator (21) and a pressure reducing valve (17) and so forth, whereby when, for instance, the operation lever (68) is operated, the switching valve (9) is switched, and the boom cylinder (57A) is activated by the weight of a working machine, thereby making it possible to lower the working machine. In contrast, in a case where the actuators (57A, 57B, 57C, 56A, 54) are not driven with the engine (1) in a halt state and if a closing command is selected with the selection command device (24), the control device (25) outputs a closing driving signal to cause the on-off valve (23) to close the pipe line connecting the accumulator (21) to the pressure reducing valve (17). Even if the operation lever (68) or the like is accidentally operated, the actuators (57A, 57B, 57C, 56A, 54) will not operate, and therefore the working machine will not lower, whereby any operation against the operator's intention can securely be prevented.
摘要翻译：当发动机（1）处于从动状态时，控制装置（25）输出打开驱动信号，使开闭阀（23）处于打开状态，当操作杆（68等）辅助液压泵（7）的压力油通过用于切换的减压阀供给到切换阀（8-16）的驱动部分。这调节来自主液压泵（3,4）的压力油的流量和方向，并且致动器（57A，57B，57C，56A，54）可以以对应于操作量的速度操作。当发动机（1）处于非驱动状态时，当驱动致动器（57A，57B，57C，56A，54）时，如果通过选择指令装置（24）选择打开命令，则控制装置 25）输出打开驱动信号，使开闭阀（23）打开连接蓄能器（21）和减压阀（17）等的管路，由此例如当操作杆（ 68），切换阀（9）被切换，动臂缸（57A）由作业机械的重量启动，能够使作业机器下降。相反，在发动机（1）处于停止状态的驱动器（57A，57B，57C，56A，54）不被驱动的情况下，如果通过选择指令装置（24）选择了关闭指令，则控制装置（25）输出关闭驱动信号，使开闭阀（23）关闭将蓄能器（21）连接到减压阀（17）的管路。即使操作杆（68）等意外操作，致动器（57A，57B，57C，56A，54）也不会动作，因此工作机械不会下降，从而可以安全地对操作者的意图进行操作被阻止

2. 发明公开

EP4446500A1 WORK MACHINE 审中-实审
公开(公告)号：EP4446500A1
公开(公告)日：2024-10-16
申请号：EP22904193.4
申请日：2022-12-05
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NARIKAWA, Ryu , SAITOH, Teppei , KOTANI, Tadashi , FUJITA, Koji , ITO, Hideaki , ISHIMOTO, Hidefumi , SATO, Kei
IPC分类号： E02F3/43 , E02F9/20 , E02F9/22
CPC分类号： E02F3/43 , E02F9/20 , E02F9/22
摘要： Operations of an upper swing structure and a front work device are controlled such that a swing operation of the upper swing structure starts after a work tool starts only a lifting operation, the lifting operation and the swing operation are performed until the work tool reaches a height position of a passing position, the work tool reaches the height position of the passing position, only the swing operation is performed after the work tool reaches the height position of the passing position, the swing operation of the upper swing structure starts to swing at a swing deceleration start position, and only the swing operation is performed until the work tool reaches a swing position of the passing position to pass through the passing position. Accordingly, it is possible to reduce the discomfort feeling of an operator while realizing interference prevention at the time of a loading operation and a stop during the loading operation.

3. 发明授权

EP0638690B1 HYDRAULIC DRIVING DEVICE FOR A CONSTRUCTION MACHINE 有权
标题翻译：液压控制装置，建设
公开(公告)号：EP0638690B1
公开(公告)日：1999-09-08
申请号：EP94906361.4
申请日：1994-02-09
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： AOYAGI, Yukio , OTSUBO, Kazuhiko , YASUDA, Gen , FUJITA, Koji , YAMAKAWA, Takayuki , NARITA, Kazuyoshi
IPC分类号： E02F3/43
CPC分类号： E02F9/226 , E02F9/2217 , E02F9/2246
摘要： When an engine (1) is in a driven state, a control device (25) outputs an opening driving signal so as to put an on-off valve (23) in an open state, and when operation levers (68 and so forth) are operated, the pressure oil of an auxiliary hydraulic pump (7) is supplied to the driving portions of switching valves (8-16) via a pressure reducing valve for switching. This regulates the flow rate and direction of the pressure oil from main hydraulic pumps (3, 4) and actuators (57A, 57B, 57C, 56A, 54) can be operated at a speed corresponding to the amount of the operation. When driving the actuators (57A, 57B, 57C, 56A, 54) while the engine (1) is in a non-driven state and if an opening command is selected by means of a selection command device (24), the control device (25) outputs an opening driving signal to cause the on-off valve (23) to open a pipe line connecting an accumulator (21) and a pressure reducing valve (17) and so forth, whereby when, for instance, the operation lever (68) is operated, the switching valve (9) is switched, and the boom cylinder (57A) is activated by the weight of a working machine, thereby making it possible to lower the working machine. In contrast, in a case where the actuators (57A, 57B, 57C, 56A, 54) are not driven with the engine (1) in a halt state and if a closing command is selected with the selection command device (24), the control device (25) outputs a closing driving signal to cause the on-off valve (23) to close the pipe line connecting the accumulator (21) to the pressure reducing valve (17). Even if the operation lever (68) or the like is accidentally operated, the actuators (57A, 57B, 57C, 56A, 54) will not operate, and therefore the working machine will not lower, whereby any operation against the operator's intention can securely be prevented.

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