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公开(公告)号：US20240360648A1
公开(公告)日：2024-10-31
申请号：US18687451
申请日：2023-03-22
CPC分类号： E02F9/2083 , E02F3/16 , E02F3/434 , E02F9/2253 , E02F9/226
摘要： Provided is a control device for a wheel loader that is capable of improving the productivity of excavation work by reducing the work time required for the excavation work. A control device 120 is a control device for a wheel loader 1 that excavates a target by moving a vehicle body 2 forward with rotation of wheels 5f, 5r to plunge a bucket 3 into the target. The control device 120 moves the vehicle body 2 forward with the bucket 3 plunged into the target, and brakes the wheels 5f, 5r when a rotational speed of the wheels 5f, 5r exceeds a predetermined threshold BS.
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公开(公告)号：US20230392347A1
公开(公告)日：2023-12-07
申请号：US18022812
申请日：2021-11-12
发明人： Satoshi NAKAMURA , Kouji SHIWAKU , Shinya IMURA
CPC分类号： E02F3/439 , E02F3/32 , E02F9/262 , E02F9/2203 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： A working status indicating a status related to the present work of a hydraulic excavator 1 is determined on the basis of operation signals output from a control lever 24, posture information output from inertial measuring devices 27 to 30, load information output from pressure sensors 32 and 33, and a work area set by a display input device 26, an operation form indicating contents of an operation in operation correction control of a front work implement 12 is decided from a plurality of operation forms set in advance, according to the determined working status, and the operation correction control is performed such that the front work implement moves according to the operation form. Thus, an appropriate assisting operation can be performed in machine control, so that the work accuracy can be improved.
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公开(公告)号：US20230304261A1
公开(公告)日：2023-09-28
申请号：US18024119
申请日：2022-02-28
发明人： Hiroki ISHII , Shinya IMURA , Shinjiro YAMAMOTO , Koji SHIWAKU
CPC分类号： E02F9/205 , E02F9/265 , G07C5/02 , E02F9/2285
摘要： A work machine includes: a work device; a posture sensor that senses posture information of the work device; a hydraulic actuator that drives the work device; and a controller configured to generate operation plan information on the basis of task information necessary for automatic control, the task information being obtained from an external system, and perform automatic control of the hydraulic actuator on the basis of the operation plan information and a sensing result of the posture sensor. The controller outputs the operation plan information to the external system. The controller does not perform the automatic control when an approval signal indicating that the operation plan information is approved is not input from the external system. The controller performs the automatic control when the approval signal is input from the external system.
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公开(公告)号：US20230137344A1
公开(公告)日：2023-05-04
申请号：US17912026
申请日：2021-02-05
发明人： Yuho SAITO , Hidekazu MORIKI , Shinya IMURA , Takaaki CHIBA
摘要： A type of an object is determined and the movement direction of the object is predicted on the basis of a sensing result of the object sensed by an on-machine obstacle sensor. Information relating to the object that is the object sensed by the on-machine obstacle sensor and has been determined to have moved to the outside of a sensing range of the on-machine obstacle sensor is immediately deleted from an environment map on the basis of the type and the movement direction of the object. This can properly process information on the object that has gotten out of the sensing range, according to the cause of the object getting out of the sensing range.
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公开(公告)号：US20220333352A1
公开(公告)日：2022-10-20
申请号：US17640947
申请日：2020-11-02
发明人： Kento KUMAGAI , Shinya IMURA , Yasutaka TSURUGA , Takaaki CHIBA , Hiroaki AMANO , Shinji NISHIKAWA , Akihiro NARAZAKI , Genroku SUGIYAMA
摘要： Provided is a work machine which can achieve both of excellent operability when an operator manually operates a machine body or a work device and an accuracy of control of the machine body or the work device when a controller performs automatic control. The controller is configured to, in a case where the automatic control function selector switch gives an instruction to disable the automatic control function, adjust an opening amount of a bleed-off valve to a maximum opening amount or an opening amount corresponding to input amounts of control levers, and in a case where the automatic control function selector switch gives the instruction to enable the automatic control function, adjust the opening amount of the bleed-off valve, in at least part of an operation region of the control levers, so as to be smaller than the opening amount with the instruction to disable the automatic control function being given.
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公开(公告)号：US20220290406A1
公开(公告)日：2022-09-15
申请号：US17637533
申请日：2021-03-12
发明人： Kento KUMAGAI , Shinya IMURA , Yasutaka TSURUGA , Takaaki CHIBA , Hiroaki AMANO , Shinji NISHIKAWA , Akihiro NARAZAKI
IPC分类号： E02F9/22 , E02F9/26 , E02F9/20 , F15B13/044 , F15B13/02
摘要： A work machine that can keep the control accuracy of actuators irrespective of temperature variation of a hydraulic operating fluid that passes through flow rate controllers that control the flow rates of supply to the actuators is provided. For this purpose, the flow rate controllers each have a valve body that is disposed on a main hydraulic line connecting a delivery line of a hydraulic pump and the actuator and that moves according to an operation pressure from a solenoid proportional pressure reducing valve, a sampling hydraulic line that branches from the main hydraulic line, and a temperature sensor set on the sampling hydraulic line. The controller is configured to correct a command electrical signal to the solenoid proportional pressure reducing valve according to a signal from the temperature sensor.
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公开(公告)号：US20220282459A1
公开(公告)日：2022-09-08
申请号：US17632362
申请日：2020-03-25
发明人： Takaaki CHIBA , Shinya IMURA , Shinjiro YAMAMOTO , Masamichi ITO , Koji SHIWAKU
摘要： Provided is an operation assistance system for a work machine having both operation assistance and work assistance functions, capable of reducing the inconvenience to an operator or the like of setting an area of the operation assistance function and an area of the work assistance function, and preventing a collision of the work machine with an object in a work area. The operation assistance system for a work machine has the operation assistance function of stopping a hydraulic excavator (work machine) 1 when an object is detected in a stop area 40 set in advance and the work assistance function of preventing the hydraulic excavator (work machine) 1 from going out of a work area 51 set in advance. When both of the work assistance function and the operation assistance function can be switched between enabled and disabled states, and when the work assistance function is in an enabled state and the work area 51 is set, the operation assistance system enables the operation assistance function and sets the work area 51 as the stop area 40.
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公开(公告)号：US20220145579A1
公开(公告)日：2022-05-12
申请号：US17433616
申请日：2019-09-30
发明人： Shinya IMURA , Masamichi ITO , Hidekazu MORIKI , Yuho SAITO
摘要： Provided is a work machine that can suppress decrease in work efficiency while reducing the possibility of contacting a worker or a dump truck, etc. A movement range is set in advance so as to avoid entry of a worker or a dump truck, etc. into the set movement range. The work machine performs stop control with clearance for an obstacle having entered the movement range, but performs stop control with relatively small clearance (minimum clearance) for a movement range. Thus, the work machine can reduce the frequency of stopping a body or a work implement and suppress decrease in work efficiency. Since the work machine controls the body or the work implement to stop with clearance when the worker or the dump truck, etc. enters the movement range of the work machine, the work machine can reduce the possibility of contacting the worker or the dump truck, etc.
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公开(公告)号：US20210388578A1
公开(公告)日：2021-12-16
申请号：US17422643
申请日：2020-02-14
发明人： Yuho SAITO , Hidekazu MORIKI , Shinya IMURA , Kouji SHIWAKU
摘要： A construction machine includes a posture sensor provided on a front member of a front work implement. An external environment recognition device detects an object around a main body, and a controller calculates a dead angle range from a recognition range of the external environment recognition device. An assumed movement range in which a moving body is assumed to exist in the dead angle range in a period of time determined in advance is calculated; and a movable range within which the front work implement is movable in a period of time determined in advance is calculated on the basis of the posture information detected by the posture sensor. Preventative control is then performed for preventing contact between the moving body and the front work implement on the basis of the assumed movement range of the moving body and the movable range of the front work implement.
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公开(公告)号：US20210317636A1
公开(公告)日：2021-10-14
申请号：US17268717
申请日：2019-07-11
IPC分类号： E02F9/22 , F15B11/028 , F15B11/042 , F15B11/044 , F15B19/00
摘要： A construction machine that precisely enables derivation of the operation characteristics of hydraulic actuators in a high-velocity area with less calibration operation is provided. A controller (10) has a calibration mode in which the controller (10) derives operation characteristics (α(xs)) representing a relation among a spool position (xs) of a meter-in valve (8a1), an operation velocity (Va) of a hydraulic actuator (4a), and a differential pressure (ΔP) across the meter-in valve (8a1), and is configured to, in a case where the spool position (xs) of the meter-in valve (8a1) has changed in a direction to increase the opening area of the meter-in valve (8a1) in the calibration mode, output a command signal to increase the opening area of a bleed-off valve (8b1) to a bleed-off solenoid proportional pressure-reducing valve (8b2) as a command signal to reduce the differential pressure (ΔP).
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