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1. 发明公开

EP3985179A1 CONSTRUCTION MACHINE 审中-实审
公开(公告)号：EP3985179A1
公开(公告)日：2022-04-20
申请号：EP20867555.3
申请日：2020-06-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NISHIKAWA Shinji , SHIWAKU Koji , YAMAMOTO Shinjiro , KAMEOKA Ryota , NARAZAKI Akihiro
IPC分类号： E02F9/20 , E02F9/24 , E02F9/26
摘要： There is provided a construction machine that achieves both safety and operability by lowering the possibility of an accident due to contact between the construction machine and a worker in the periphery of a vehicle body while securing operability in situations where an object required for work is present in the periphery. A controller has a normal mode as a control mode for making the operation limiting control effective and a temporary cancelation mode as a control mode for temporarily canceling the operation limiting control. The controller shifts to the temporary cancelation mode in response to operation of the control canceling device while in the normal mode. The controller shifts back to the normal mode in a case where a predetermined condition not responsive to operation of the control canceling device is satisfied while in the temporary cancelation mode.

2. 发明公开

EP4194619A1 WORK MACHINE 审中-实审
公开(公告)号：EP4194619A1
公开(公告)日：2023-06-14
申请号：EP21930336.9
申请日：2021-12-08
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI Kento , IMURA Shinya , TSURUGA Yasutaka , CHIBA Takaaki , AMANO Hiroaki , NISHIKAWA Shinji , NARAZAKI Akihiro , SUGIYAMA Genroku , YAMAMOTO Shinjiro
IPC分类号： E02F9/20 , F15B11/00 , F15B11/02
摘要： The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energysaving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.

3. 发明公开

EP4286597A1 WORK MACHINE 审中-实审
公开(公告)号：EP4286597A1
公开(公告)日：2023-12-06
申请号：EP21923173.5
申请日：2021-12-10
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： SUZUKI Yusuke , TANAKA Hiroaki , KANARI Yasuhiko , SAKAMOTO Hiroshi , IGARASHI Teruki , NARAZAKI Akihiro
IPC分类号： E02F3/43 , E02F9/22
摘要： The invention of the present application intends to provide a work machine that can improve the work performance by keeping the work state of work equipment conforming to the intention of an operator in machine control for causing the work equipment to follow an excavation target surface. For this purpose, a controller determines the work state of the work equipment on the basis of an operation input amount inputted from an operation input device and the posture of the work equipment with respect to the target surface, computes a range of an action command value of actuators in which the work state determinedis kept, and corrects, within the range, the action command value of the actuators to make the distance between the work equipment and the target surface small.

4. 发明公开

EP4101991A1 WORKING MACHINE 审中-实审
公开(公告)号：EP4101991A1
公开(公告)日：2022-12-14
申请号：EP21780963.1
申请日：2021-03-31
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI Kento , IMURA Shinya , TSURUGA Yasutaka , CHIBA Takaaki , AMANO Hiroaki , NISHIKAWA Shinji , NARAZAKI Akihiro , SUGIYAMA Genroku , YAMAMOTO Shinjiro
IPC分类号： E02F3/43 , E02F9/22 , F15B11/02 , F15B11/024 , F15B11/042 , F15B11/044 , F15B11/08 , F15B11/16
摘要： An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.

5. 发明公开

EP2628924A1 CONTROLLER OF CONSTRUCTION MACHINE 审中-公开
标题翻译： STEUERGERÄTFÜRBAUMASCHINEN
公开(公告)号：EP2628924A1
公开(公告)日：2013-08-21
申请号：EP11832570.3
申请日：2011-10-12
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NARAZAKI Akihiro , KARASAWA Hideo , NAKAMURA Tsuyoshi
IPC分类号： F02D29/04 , F02D29/00 , F02D45/00
CPC分类号： E02F9/2062 , F02D29/00 , F02D31/008 , F02D41/021 , F02D41/083 , F02D2200/023 , F02D2200/0414 , F02D2200/0606
摘要： Included are a target speed setting section (29) and a speed control section (23). The target speed setting section (29) sets a target speed of an engine (2) to an idle speed that is lower than an input speed input with an engine control dial (13) when no operating signal is output from a control lever (9) over an predetermined period of time. The speed control section (23) controls speed of the engine (2) based on the target speed set by the target speed setting section. The target speed setting section (29) includes an idle speed setting section (42) that corrects the idle speed according to values detected by sensors (27, 28, 30) so that reduction in an output of the engine due to a change in a state quantity associated with an environment under which the engine is placed can be inhibited. This allows a good operating feel to be maintained during a reset from an auto idle state even with an engine output reduced according to a change in environment.
摘要翻译：包括目标速度设定部（29）和速度控制部（23）。当没有操作信号从控制杆（9）输出时，目标速度设定部分（29）将发动机（2）的目标速度设定为低于用发动机控制转盘（13）输入的输入速度的怠速速度）在预定时间段内。速度控制部（23）基于由目标速度设定部设定的目标速度来控制发动机（2）的速度。目标速度设定部（29）包括怠速设定部（42），该怠速设定部（42）根据由传感器（27,28,30）检测到的值来校正怠速，使得由于变更引起的发动机的输出的减少可以抑制与放置发动机的环境相关联的状态量。这允许在自动空转状态的复位期间保持良好的操作感觉，即使根据环境变化引擎输出减少。

6. 发明公开

EP4368839A1 WORK MACHINE 审中-实审
公开(公告)号：EP4368839A1
公开(公告)日：2024-05-15
申请号：EP22922036.3
申请日：2022-10-31
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI Kento , IMURA Shinya , TSURUGA Yasutaka , CHIBA Takaaki , YAMAMOTO Shinjirou , AMANO Hiroaki , NISHIKAWA Shinji , NARAZAKI Akihiro
IPC分类号： F15B11/044 , E02F9/22 , F15B11/00 , F15B11/028 , F15B11/042 , F15B11/16
CPC分类号： F15B11/16 , F15B11/042 , F15B11/028 , F15B11/00 , F15B11/044 , E02F9/22
摘要： The present invention intends to provide a work machine that can execute speed control of an actuator and torque control of a swing motor by a simple configuration at the time of combined operation to simultaneously drive the swing motor and the other actuator. For this purpose, a controller calculates a pump target flow rate on the basis of an actuator target flow rate and a swing target flow rate and calculates a target meter-in opening area of an actuator directional control valve on the basis of the actuator target flow rate, a pump pressure, and an actuator meter-in pressure. The controller calculates target torque of the swing motor on the basis of the input amount of operation devices and output values of posture sensors and calculates a swing target meter-out pressure on the basis of the target torque and a swing meter-in pressure. The controller calculates a target meter-out opening area of a swing directional control valve on the basis of the swing target meter-out pressure and a swing meter-out pressure.

7. 发明公开

EP4198206A1 WORK MACHINE 审中-实审
公开(公告)号：EP4198206A1
公开(公告)日：2023-06-21
申请号：EP22745549.0
申请日：2022-01-06
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NISHIKAWA Shinji , TANAKA Hiroaki , MORIKAWA Masatoshi , NARAZAKI Akihiro
IPC分类号： E02F3/43 , E02F9/26
摘要： A work machine includes a work implement provided to a machine body, a posture sensor that senses posture information regarding the work implement, a controller configured to compute a specific position of the work implement on the basis of the posture information, set a limited area that the work implement is prohibited from entering, compute a movable distance as a distance between the limited area and the specific position of the work implement, and limit operation of the work implement according to the movable distance to prevent the work implement from entering the limited area, and an input device for inputting to the controller input information input by an operation of an operator. The controller includes a storage device that stores boundary information related to a plurality of different kinds of shapes of limited area boundaries, and the controller is configured to select one from among the plurality of kinds of shapes of limited area boundaries included in the boundary information, on the basis of the input information input from the input device, and set a limited area boundary of the selected kind of shape.

8. 发明公开

EP4187023A1 WORK MACHINE 审中-公开
公开(公告)号：EP4187023A1
公开(公告)日：2023-05-31
申请号：EP21935128.5
申请日：2021-11-09
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： TANAKA Hiroaki , SUZUKI Yusuke , NARAZAKI Akihiro , KANARI Yasuhiko , SAKAMOTO Hiroshi
IPC分类号： E02F3/43 , E02F9/22
摘要： The invention of the present application has as its object the provision of a work machine that is equipped with a function to prevent a work device thereof from going into an entry prohibited area and can satisfy both working precision and working efficiency of the work device. A controller is therefore configured to start work range limiting control to decelerate or stop an action of a machine main body or the work device when a distance between a monitor point set beforehand on the work device and the entry prohibited area decreases to a first distance, to end the work range limiting control when the distance between the monitor point and the entry prohibited area increases to a second distance greater than the first distance, and to change the second distance according to an operation amount of an operation device.

9. 发明授权

EP2320093B1 ENGINE LUG-DOWN SUPPRESSING DEVICE FOR HYDRAULIC WORK MACHINERY 有权转让
标题翻译：用于液压工作机械的发动机牵引压紧装置
公开(公告)号：EP2320093B1
公开(公告)日：2017-05-17
申请号：EP09806719.2
申请日：2009-08-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NARAZAKI Akihiro , ARIGA Nobuei
IPC分类号： F15B11/00 , E02F9/22 , F04B49/00
CPC分类号： E02F9/2246 , E02F9/2235 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F15B11/0423 , F15B2211/20553 , F15B2211/26 , F15B2211/633 , F15B2211/6346 , F15B2211/6652 , F15B2211/851

10. 发明公开

EP4012121A1 WORK MACHINE AND SURROUNDING MONITORING SYSTEM 审中-实审
公开(公告)号：EP4012121A1
公开(公告)日：2022-06-15
申请号：EP20881632.2
申请日：2020-10-28
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： ANAHARA Keiichirou , HAGIWARA Naoki , MIZOGUCHI Kazuhiko , NARAZAKI Akihiro , NISHIKAWA Shinji
IPC分类号： E02F9/26
摘要： In a hydraulic excavator 1 including a machine body 1B and a front work device 1A, when an object is detected by sensors 13a, 13b, and 13c for detecting an object around the machine body 1B, when operation limiting control for limiting the operation of at least one of the machine body 1B and the front work device 1A is enabled, or when an operation device 4 is operated, the detection of the object is notified to an operator by a first state warning, and when the operation limiting control is enabled and when the operation device 4 is not operated, the detection of the object is notified to the operator by a second state warning that is weaker in warning intensity than the first state warning. Accordingly, the botheration for the operator can be suppressed while securing the effectiveness of an alarm in periphery monitoring, and the safety performance can be enhanced.

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