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1. 发明申请

US20230123961A1 Traffic Control Server, Traffic Control System, and Display Device Capable of Wireless Communication With Traffic Control Server 有权
公开(公告)号：US20230123961A1
公开(公告)日：2023-04-20
申请号：US17913968
申请日：2021-03-12
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroto MORIZANE , Tomoyuki HAMADA , Mikio BANDO , Masaki KANAI
IPC分类号： G05D1/00 , G08G1/00 , G08G1/16
摘要： Provided is a traffic control server, a traffic control system, and a display device capable of wirelessly communicating with the traffic control server that are capable of realizing both safety securement for a manned vehicle and an unmanned vehicle traveling in a mine and prevention of reduction in productivity by controlling interference between the manned vehicle and the unmanned vehicle. An interference control part of the traffic control server generates warning information for performing at least one of displaying a warning screen or making a warning sound to the manned vehicle in accordance with an overlap (interference) among a stop trigger region of the manned vehicle, a travel-permitted section set for the unmanned vehicle, a next travel-permitted section that is the travel-permitted section to be subsequently set for the unmanned vehicle, and a warning region set for the travel-permitted section, and a server-side communication control part transmits the warning information to the manned vehicle.

2. 发明申请

US20230099135A1 Construction Machine 有权
公开(公告)号：US20230099135A1
公开(公告)日：2023-03-30
申请号：US17908084
申请日：2021-04-07
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Seiji HIJIKATA , Yasutaka TSURUGA , Masatoshi HOSHINO , Ryou YAGISAWA
IPC分类号： E02F9/22
摘要： An object of the present invention is to provide a construction machine that is equipped with a pressure accumulating device, which accumulates the return oil of an actuator, and that is capable of adjusting the operation speed of the actuator according to the revolution speed of a prime mover. For this purpose, in a construction machine including a prime mover, a revolution speed setting device that sets a revolution speed of the prime mover, an actuator, a pressure accumulating device that can supply and discharge a hydraulic fluid to and from the actuator, a first control valve disposed on a hydraulic fluid line that connects the pressure accumulating device and the actuator to each other, an operation device that gives an instruction for operation of the actuator, and a controller that is inputted with an operation signal of the operation device and outputs a control signal to the first control valve, the controller controls the first control valve according to an operation amount of the operation device and the revolution speed set by the revolution speed setting device.

3. 发明申请

US20230092796A1 Work Machine Maintenance Management System 有权
公开(公告)号：US20230092796A1
公开(公告)日：2023-03-23
申请号：US17909031
申请日：2021-10-13
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Takashi IGARASHI , Yasuhiko ABE , Yukihito SUZUKI
IPC分类号： G05B23/02
摘要： Provided is a work machine maintenance management system capable of predicting replacement timing of a component of a work machine early. The work machine maintenance management system of this disclosure includes a maintenance management DB server 110 that accumulates maintenance management information of a plurality of work machines and a maintenance management control device 120 that predicts replacement timing of each component of each of the work machines based on the maintenance management information. The maintenance management information includes an actual durable period from start of use to replacement each component of each work machine. The maintenance management control device 120 includes a replacement-factor determining section 121, a service life model creator 122, a failure model creator 123, and a replacement time predictor 126. The replacement-factor determining section 121 determines whether a replacement factor of each component is a service life factor or a failure factor based on an actual durable period of each component of the plurality of work machines. The service life model creator 122 creates a service life model of the component whose replacement factor is determined to be the service life factor by the replacement-factor determining section 121. The failure model creator 123 creates a failure model of the component whose replacement factor is determined to be the failure factor by the replacement-factor determining section 121. The replacement time predictor 126 predicts the replacement timing of each component of each work machine based on the service life model and the failure model.

4. 发明申请

US20230085648A1 Construction Machine 有权
公开(公告)号：US20230085648A1
公开(公告)日：2023-03-23
申请号：US17909085
申请日：2021-04-07
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Seiji HIJIKATA , Yasutaka TSURUGA , Kenji HIRAKU , Masatoshi HOSHINO
IPC分类号： E02F9/22 , F15B1/04 , F15B13/02 , F15B1/26
摘要： The object of the present invention resides in provision of a construction machine in which a hydraulic cylinder can be driven in a high efficiency by an accumulator. To this end, the construction machine including: a hydraulic cylinder; a first accumulator that accumulates return fluid from the hydraulic cylinder with a first set pressure; a tank that stores hydraulic fluid therein; a first hydraulic pump that delivers the hydraulic fluid sucked from the tank; a hydraulic actuator that is driven by the first hydraulic pump; and a second accumulator that accumulates return fluid from the hydraulic actuator with a second set pressure, includes a first control valve placed in a first hydraulic line that connects the first accumulator and the hydraulic cylinder to each other, and a second control valve placed in a second hydraulic line that connects the second accumulator and the hydraulic cylinder to each other. The second set pressure is set to a value higher than that of the first set pressure.

5. 发明授权

US11572674B2 Working vehicle 有权
公开(公告)号：US11572674B2
公开(公告)日：2023-02-07
申请号：US16979975
申请日：2019-09-24
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Tetsuji Tanaka , Koji Hyodo , Yasunori Miyamoto , Isamu Aoki
IPC分类号： E02F9/22 , B62D5/07
摘要： Provided is a working vehicle capable of increasing lifting operation speed of a working device without increasing cost, even when provided with a circuit configuration that prioritizes a steering operation over a working device operation.
A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.

6. 发明申请

US20220412052A1 WORK MACHINE AND CONTROL SYSTEM 有权
公开(公告)号：US20220412052A1
公开(公告)日：2022-12-29
申请号：US17787620
申请日：2020-11-20
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hidekazu MORIKI , Ryu NARIKAWA , Shinya IMURA
IPC分类号： E02F9/20 , E02F9/26 , E02F9/24 , B60Q5/00
摘要： A hydraulic excavator for performing cooperative work with another hydraulic excavator or a worker includes: a driving device that makes the hydraulic excavator operate; a cooperative function device that shares information about the hydraulic excavator with an inside and an outside of the hydraulic excavator; and a controller that controls the driving device that makes the hydraulic excavator operate, the controller, when there is an abnormality in the cooperative function device, controlling the driving device so as to limit operation of the hydraulic excavator, and when the hydraulic excavator is performing the cooperative work, controlling the driving device so as to make a degree of limitation on the operation of the hydraulic excavator stronger than when the hydraulic excavator is not performing the cooperative work. It is thereby possible to suppress an unnecessary decrease in work efficiency by suppressing an excessive operation limitation on the hydraulic excavator.

7. 发明授权

US11479108B2 Dump truck 有权
公开(公告)号：US11479108B2
公开(公告)日：2022-10-25
申请号：US17273599
申请日：2019-11-04
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Yuutarou Iwabuchi , Shinichirou Hagihara
IPC分类号： B60B35/14 , B60K7/00 , B60K17/04 , B60P1/16
摘要： A vehicle drive unit (11) includes a spindle (12) on which a female spline portion (12G) is formed, a wheel (15) disposed on an outer peripheral side of the spindle (12), wheel bearings 17, 18 that rotatably support the wheel (15) in relation to the spindle (12), an electric motor (21) located on an axial one side of the spindle (12), a shaft (22) connected to an output shaft (21B) of the electric motor (21), a planetary gear reduction device (25) disposed between the shaft (22) and the wheel (15), and a shaft bearing (46) that rotatably supports the shaft (22) in relation to the spindle (12). A retainer (42) retaining the shaft bearing (46) is disposed on an inner peripheral surface side of the spindle (12), and a male spline portion (42E), which is spline-coupled to a female spline portion (12G) of the spindle (12), is disposed on the retainer (42).

8. 发明申请

US20220333346A1 SITE MANAGEMENT SYSTEM AND WORK MACHINE 有权
公开(公告)号：US20220333346A1
公开(公告)日：2022-10-20
申请号：US17638996
申请日：2020-08-28
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Mariko MIZUOCHI , Hiroyuki YAMADA , Hiroshi SAKAMOTO
IPC分类号： E02F9/20 , E02F9/26 , H04W4/029
摘要： 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.

9. 发明申请

US20220333338A1 WORK MACHINE 有权
公开(公告)号：US20220333338A1
公开(公告)日：2022-10-20
申请号：US17639921
申请日：2021-03-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Naoki HAYAKAWA , Shiho IZUMI
IPC分类号： E02F3/43 , E02F9/20
摘要： A controller determines whether or not a work device is in a ground contact state, by using detection data of a pressure sensor and at least one balance relation between forces or moments acting on the work device, and generate partial shape data of a work object formed by the work device, on the basis of a movement locus of a monitoring point set to the work device and an external shape of the work device in a ground contact period in which the work device is determined to be in the ground contact state, and update the present-condition shape data of the work object on the basis of the partial shape data.

10. 发明授权

US11466435B2 Hydraulic excavator with area limiting control function 有权
公开(公告)号：US11466435B2
公开(公告)日：2022-10-11
申请号：US16919313
申请日：2020-07-02
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shiho Izumi , Shuuichi Meguriya , Ryuu Narikawa , Kouji Ishikawa , Tarou Akita
IPC分类号： E02F9/22 , F02D29/02 , E02F3/43 , E02F9/20 , F02D29/04
摘要： A work machine (1) having a controller (40) that can perform area limiting control, the work machine further includes a machine control ON/OFF switch (17) that alternatively selects an ON position permitting execution of the area limiting control and an OFF position prohibiting execution of the area limiting control. The controller (40) has an engine control section (63) that performs automatic idling control when a predetermined period of time (T1) has elapsed after a point in time when all of operation levers (1, 23) have attained a neutral state. The engine control section (63) is configured to execute the automatic idling control during when the switch (17) is in the OFF position and not to execute the automatic idling control during when the switch (17) is in the ON position.

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