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公开(公告)号：US20210010226A1
公开(公告)日：2021-01-14
申请号：US16981516
申请日：2019-06-13
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hiroaki TANAKA , Hisami NAKANO , Yuusuke SUZUKI , Hiroshi SAKAMOTO
Abstract: A work machine capable of assisting in an operator's operation to allow a work tool move along a design surface indicating a target shape of an object to be worked irrespectively of an angle of the design surface and a posture of a work implement is provided. A controller determines an excavation actuator in charge of an excavation action and determines an alignment actuator in charge of an alignment action for a work tool out of a plurality of actuators on the basis of the design surface set by a work execution target setting device and the posture of the work implement measured by a work implement posture/position measurement device, determines a target velocity of the excavation actuator on the basis of operation signals outputted from an operation device, and limits a target velocity of the alignment actuator in a direction in which the work tool approaches the design surface.
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公开(公告)号：US20200048871A1
公开(公告)日：2020-02-13
申请号：US16606835
申请日：2018-08-24
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Tadashi NISHIZAWA , Hiroshi SAKAMOTO , Takuya NAKA
Abstract: Work efficiency is improved while necessary and sufficient monitoring on the surroundings of a working machine is performed. A working machine includes an undercarriage 132 on which an upperstructure 131 including a front working device is mounted in a swingable manner, and includes a surrounding monitoring device 200 that monitors surroundings. The surrounding monitoring device 200 has an information controller 161 that: sets a working region by use of terrain data and work states received from sensors detecting work states of the front working device of the working machine; calculates proximity for each of the obstacles around the working machine by use of the working regions and relative positions of each of obstacles and the working machine, the obstacles being detected by an obstacle sensor that detects obstacles around the working machine; and outputs a control instruction in accordance with the proximity.
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公开(公告)号：US20180355583A1
公开(公告)日：2018-12-13
申请号：US15780313
申请日：2016-12-01
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hidekazu MORIKI , Ryu NARIKAWA , Hiroaki TANAKA , Hiroshi SAKAMOTO , Yasutaka TSURUGA
CPC classification number: E02F9/2235 , E02F3/43 , E02F9/20 , E02F9/2012
Abstract: The control system for the hydraulic construction machine includes: a hydraulic actuator; a work device driven by the hydraulic actuator; a hydraulic pump supplying a hydraulic fluid to the hydraulic actuator; a pump flow rate control section controlling the delivery flow rate of the hydraulic pump; a pump horsepower control section controlling the horsepower of the hydraulic pump; and a target surface distance acquiring section measuring or computing a target surface distance that is the distance between a construction target surface on which the work device works and the work device. The pump flow rate control section is configured to perform control such that as the target surface distance decreases, the delivery flow rate decreases, and the pump horsepower control section is configured to perform control such that as the target surface distance decreases, the horsepower of the hydraulic pump increases.
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公开(公告)号：US20180119386A1
公开(公告)日：2018-05-03
申请号：US15567723
申请日：2016-02-23
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Hiroyuki KOBAYASHI , Hiroshi SAKAMOTO , Yoshiyuki TSUCHIE , Hidekazu MORIKI , Yasutaka TSURUGA
CPC classification number: E02F9/2025 , E02F3/32 , E02F9/2004 , E02F9/2037 , E02F9/22 , E02F9/2285 , F15B11/08
Abstract: At times of a travel-solo state of the machine body, the outputting of unnecessary electric lever operating device signals caused by machine body oscillation due to the traveling is inhibited. At times of traveling work, the output limitation of electric lever operating device signals necessary for work is inhibited. A control system for a construction machine includes an electric lever operating device that outputs a command to a hydraulic actuator, a travel control lever device that outputs a command to a travel device, and a controller that outputs a drive command to a solenoid proportional valve that decompresses hydraulic fluid supplied from a pilot hydraulic source. The control system includes a machine body state judgment part that judges the state of the machine body based on an electric signal from the electric lever operating device and an operation amount of the travel control lever device and a dead zone calculation part that calculates a dead zone for the electric signal from the electric lever operating device based on the state of the machine body. The dead zone calculation part sets the dead zone for the electric signal at a first predetermined value when the machine body is in the travel-solo state and sets the dead zone for the electric signal at a second predetermined value smaller than the first predetermined value when the machine body is in the traveling work state.
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公开(公告)号：US20230332375A1
公开(公告)日：2023-10-19
申请号：US18023448
申请日：2021-12-10
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yusuke SUZUKI , Hiroaki TANAKA , Yasuhiko KANARI , Hiroshi SAKAMOTO , Teruki IGARASHI , Akihiro NARAZAKI
CPC classification number: E02F3/435 , E02F9/2203 , E02F9/262 , E02F9/265 , E02F9/2285
Abstract: 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 determined is 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.
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Patent Agency Ranking
公开(公告)号：US20220333346A1
公开(公告)日：2022-10-20
申请号：US17638996
申请日：2020-08-28
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Mariko MIZUOCHI , Hiroyuki YAMADA , Hiroshi SAKAMOTO
Abstract: A site management system manages the positions of workers and work areas of work machines. The workers can recognize the work areas of the work machines at a work site in which the work machines and the workers carry out work. A site management device is connected to a worker terminal carried by a worker and a work machine processor is mounted on a work machine 1. The site management device generates worker information 360 on the basis of a signal transmitted from the worker terminal and generates work machine information 350 based on a signal transmitted from the work machine processor. Work area information 380 including the position and the work area of a work machine is generated on the basis of the pieces of information 350 and 360 and a work area notification signal is transmitted with the work area information to the worker terminal device.
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公开(公告)号：US20220316173A1
公开(公告)日：2022-10-06
申请号：US17607954
申请日：2020-06-16
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Ryu NARIKAWA , Hidekazu MORIKI , Hiroshi SAKAMOTO , Hiroaki TANAKA
Abstract: A hydraulic excavator having a plurality of front implement members, including a bucket, has a controller that controls the work implement by using: excavation assistance control that controls the work implement such that the bucket moves along a predetermined target excavation surface; and deviation prevention control that prevents deviation of the work implement from a predetermined work area by decelerating or stopping operation of a subject front implement member that is included in the plurality of front implement members and that can deviate the work implement from the work area. The controller controls the work implement such that when the controller controls the work implement by using both the excavation assistance control and the deviation prevention control, an operation direction of the bucket approximates to an operation direction of the bucket that is to be generated when the work implement is controlled by using only the excavation assistance control.
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公开(公告)号：US20220136216A1
公开(公告)日：2022-05-05
申请号：US17434471
申请日：2020-09-28
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hiroaki TANAKA , Hisami NAKANO , Yusuke SUZUKI , Hiroshi SAKAMOTO
Abstract: The present disclosure provides a work machine capable of providing operation assistance matching an operator's intent in consideration of a rotating motion. A control device 80 includes a storage device 81 and a central processing device 82. The storage device 81 has stored therein construction target information for a work device 10 and determination criteria information for the work content of the work device 10 based on the amount of operation of a rotating device 30. The central processing device 82, based on the position and attitude of the work device 10 detected by a sensor 60, the amount of operation of the rotating device 30 detected by an operation amount detection device, and the determination criteria information stored in the storage device 81, determines the work content of the work device 10, calculates a correction value for the construction target information based on the determined work content, and controls a drive device 50 based on the construction target information and the correction value to assist an operation by an operator.
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公开(公告)号：US20210230837A1
公开(公告)日：2021-07-29
申请号：US17054797
申请日：2019-06-07
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Ryu NARIKAWA , Hiroshi SAKAMOTO , Hidekazu MORIKI
Abstract: A work machine includes a plurality of actuators that drive a work device; a posture sensor that senses postural data about the work device; and a controller having a degree-of-proximity calculating section that computes a degree of proximity that is an index value indicating proximity between an intrusion prohibition region and the work device on the basis of positional data about the intrusion prohibition region and the postural data. A command section executes, when the proximity specified by the degree of proximity is closer than proximity specified by a degree-of-proximity threshold, operating area limiting control to decelerate at least one of the plurality of actuators such that an intrusion of the work device into the intrusion prohibition region is prevented. History of the data about the degree of proximity calculated at the degree-of-proximity calculating section is stored and the degree-of-proximity threshold is altered on the basis of the history data.
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公开(公告)号：US20190352885A1
公开(公告)日：2019-11-21
申请号：US16331309
申请日：2017-11-02
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Kazushige KUROKAMI , Hiroshi SAKAMOTO , Mariko MIZUOCHI
Abstract: Provided is a controller (50) that includes a mechanical state acquisition section (400) that acquires information regarding a posture and an operation of a hydraulic excavator; a blind angle calculation section (500) that calculates a blind angle area from a seat in a cab (1f) of the hydraulic excavator based on the information indicating the posture and the operation of the hydraulic excavator and acquired by the mechanical state acquisition section (400); and a visibility level determination section (300) that determines a visibility level of an obstacle based on the blind angle area calculated by the blind angle calculation section (500) and a positional relationship calculated by a position relation calculation section (200). Further, a warning level determination section (600) of the controller (50) adjusts a warning level in accordance with the visibility level determined by the visibility level determination section (300).
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