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11. 发明授权

US12012723B2 Work machine 有权
公开(公告)号：US12012723B2
公开(公告)日：2024-06-18
申请号：US17429953
申请日：2019-12-13
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hidekazu Moriki , Ryu Narikawa , Masaki Kanai , Kouji Shiwaku , Shinya Imura
IPC分类号： E02F9/20 , E02F3/43 , E02F9/24
CPC分类号： E02F9/2033 , E02F9/24 , E02F3/435
摘要： In a case that a change instruction to instruct to change a work area A1 to a requested work area A2 is input, whether or not change of the work area A1 to the requested work area A2 is possible is judged on the basis of the work area A1, location information of a machine main body configured by an upper swing structure 10 and a lower track structure 9, and posture information of a work device 15, and the work area A1 is overwritten with the requested work area A2 to change the work area in an only case that it is judged that change is possible. This can suppress interference between plural work machines.

12. 发明授权

US11987955B2 Work machine management system 有权
公开(公告)号：US11987955B2
公开(公告)日：2024-05-21
申请号：US17633458
申请日：2020-04-15
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Akira Kurasako , Hideki Akita , Hidekazu Motoki
IPC分类号： E02F9/22 , E02F9/26
CPC分类号： E02F9/2235 , E02F9/26 , E02F9/2271
摘要： It is made possible to prevent damage to hydraulic parts of a work machine due to a decrease in performance of a hydraulic fluid even when the hydraulic fluid of a hydraulic system is changed and the hydraulic fluid becomes a mixed oil in which a mineral oil and a biodegradable oil are mixed with each other. For this purpose, a storage device stores, in advance, oil change history information of the hydraulic fluid, oil kind determination values for determining whether the hydraulic fluid is either the mineral oil or the biodegradable oil or the mixed oil of the mineral oil and the biodegradable oil, and abnormality determination values for respective kinds of the hydraulic fluid. A controller checks whether the oil change history information includes oil change information for which oil kind determination has not been made. When there is oil change information for which oil kind determination has not been made, the controller determines a kind of the hydraulic fluid on the basis of the respective values of a plurality of oil properties detected by an oil sensor and the oil kind determination values. The controller determines an abnormality in the hydraulic fluid by using abnormality determination values corresponding to a result of determination of the kind of the hydraulic fluid.

13. 发明公开

US20240157786A1 Vehicular Axle Device 审中-公开
公开(公告)号：US20240157786A1
公开(公告)日：2024-05-16
申请号：US18280007
申请日：2022-03-14
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Tomohiro ONISHI
IPC分类号： B60K17/16 , B60K23/04
CPC分类号： B60K17/16 , B60K2023/046
摘要： A differential case (23) is therein provided with a plurality of rotating discs (38) that are spline coupled to an outer peripheral side of a right side gear (35), and a plurality of non-rotating discs (39) that are arranged between the respective rotating discs (38). A pressure ring (43) is disposed between a right retainer (41) and the rotating disc (38). The right retainer (41) is provided with a piston (46) that applies a load to the pressure ring (43) to bring the rotating discs (38) and the non-rotating discs (39) into frictional contact. A lever member (53) is disposed between the differential case (23), the right side gear (35) and the pressure ring (43). The lever member (53) transmits a reaction force due to the engagement between the pinion gear (33) and the right side gear (35) to the pressure ring (43) to control a load to be applied to the pressure ring (43) from the piston (46).

14. 发明授权

US11982069B2 Work vehicle 有权
公开(公告)号：US11982069B2
公开(公告)日：2024-05-14
申请号：US17274211
申请日：2019-11-27
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Atsushi Nakayama , Tsukasa Ikeuchi , Atsushi Ninomiya , Katsumi Usami , Yusuke Daimon
IPC分类号： E02F9/16 , E02F9/20
CPC分类号： E02F9/16 , E02F9/2004
摘要： This invention provides a work vehicle in which operating switches are easy to operate even in a situation where the vehicle is shaken. In a wheel loader 1 including a working device 2 and a cab 3, wherein the cab 3 is provided with a driver's seat 51, a pair of front pillars 331L, 331R, an operating lever 54 for operating the working device 2, and a switchbox 55 having an operating surface 550 in which multiple operating switches S are arranged, the operating lever 54 is placed between a right front pillar 331R and the driver's seat 51, the switchbox 55 is installed to the right front pillar 331R with its long side direction being along the pillar extension direction, the operating surface 550 is oriented toward a direction along an imaginary line IL that passes through the center in its short side direction and extends perpendicular to the surface, the imaginary line intersecting a backrest of the driver's seat 51 and a center line C with respect to the left and right direction of the cab 3, and one side of the switchbox 55 in a short side direction has a guide 553 formed to overhang out along its long side direction.

15. 发明公开

US20240151003A1 Work Machine 审中-公开
公开(公告)号：US20240151003A1
公开(公告)日：2024-05-09
申请号：US18281450
申请日：2022-03-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Naoya TAKAGAWA , Kento KUMAGAI , Mitsuhiko KANEHAMA , Hiroaki AMANO , Ryousuke ITOU
IPC分类号： E02F9/22 , F15B13/02 , F15B15/18
CPC分类号： E02F9/2203 , F15B13/02 , F15B15/18 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/327
摘要： A controller of a work machine computes a requested velocity of a hydraulic actuator based on an operation signal, computes a first estimated velocity of the hydraulic actuator based on a sensed value of a first sensing device that senses motion information of a driven member, computes a second estimated velocity of the hydraulic actuator based on a sensed value of a second sensing device that senses a flow rate of a directional control valve, computes an arbitrated velocity by arbitrating the first estimated velocity and the second estimated velocity according to a driving state of the hydraulic actuator, and controls the directional control valve based on a deviation between the requested velocity and the arbitrated velocity. The computation of the arbitrated velocity is to perform an arbitration such that a degree of effect on the second estimated velocity is larger than a degree of effect on the first estimated velocity when the hydraulic actuator starts to move, and to perform an arbitration such that the degree of effect on the first estimated velocity is larger than the degree of effect on the second estimated velocity when the driving of the hydraulic actuator is approaching a steady state.

16. 发明公开

US20240150995A1 Construction Machine 审中-公开
公开(公告)号：US20240150995A1
公开(公告)日：2024-05-09
申请号：US18280718
申请日：2022-08-31
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Ryohei FUKUCHI , Shota ISHIDA
IPC分类号： E02F3/43 , E02F3/32 , E02F3/42
CPC分类号： E02F3/435 , E02F3/32 , E02F3/425
摘要： A construction machine including a solenoid valve that reduces a boom lowering pilot pressure for a second directional control valve and a controller that controls the solenoid valve is provided. The controller computes a first opening degree command value in such a manner that a communication area between a boom lowering pressure reducing valve and a pressure receiving chamber of the second directional control valve decreases in association with a bottom pressure of a boom cylinder, computes a second opening degree command value in such a manner that the communication area increases in association with increase in a boom lowering operation amount, decides a minimum opening degree command value as an opening degree command value of the solenoid valve when an elapsed time after boom raising operation is shorter than a set time and decides a minimum selected value of the first and second opening degree command values as the opening degree command value of the solenoid valve when the elapsed time is equal to or longer than the set time, and outputs a command signal according to the decided opening degree command value to the solenoid valve.

17. 发明公开

US20240141626A1 Work Machine 审中-公开
公开(公告)号：US20240141626A1
公开(公告)日：2024-05-02
申请号：US18279615
申请日：2022-08-31
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Shinichirou YOSHIDA , Keiichirou NAKAMURA , Shinichi SASAZAKI
IPC分类号： E02F9/26 , G06T5/70
CPC分类号： E02F9/267 , G06T5/70
摘要： Provided is a work machine with a display device capable of reducing the usage of the capacity of a memory without increasing the cost while realizing display using image data in which the sharpness when being displayed is ensured. A hydraulic excavator 1 comprises: a monitor 4 for displaying a plurality of work mode screens 401 used during work and a plurality of service mode screens 402 used during maintenance; and a controller 6 for controlling display of the monitor 4, wherein the controller 6 stores first image data to be displayed on the plurality of work mode screens 401 and second image data to be displayed on the plurality of service mode screens 402, and the second image data includes specific image data X1 having a quality set to be different from a quality of the first image data.

18. 发明公开

US20240134064A1 ELECTRONIC CONTROL DEVICE 审中-公开
公开(公告)号：US20240134064A1
公开(公告)日：2024-04-25
申请号：US18279447
申请日：2022-05-30
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shinji ISHIHARA , Shiho IZUMI , Kenta NAKAGI
IPC分类号： G01S19/40 , E02F9/26 , G01S19/39 , G01S19/49 , G01S19/53
CPC分类号： G01S19/40 , E02F9/26 , G01S19/396 , G01S19/49 , G01S19/53
摘要： The present disclosure provides an electronic control device capable of suppressing variations in the position of a work machine calculated based on satellite signals received by a GNSS terminal due to changes in the GNSS communication environment, and eliminating the position error after improvement of the communication environment in a shorter time than before. The electronic control device includes: a positioning quality determination section 211 that determines whether the positioning quality is good or poor based on GNSS information; a traveling state determination section 212 that determines the traveling state, including a stop state, based on the velocity of the work machine; and a smoothing section 213 that performs smoothing processing to the GNSS information. The smoothing section 213 changes the processing intensity to weak if the smoothing condition is not satisfied, the condition being that the positioning quality is good and the traveling state is stop, and changes the processing intensity to strong after a time equivalent to update cycle since the smoothing condition has been satisfied.

19. 发明授权

US11964604B2 Cargo bed raising and lowering apparatus of dump truck 有权
公开(公告)号：US11964604B2
公开(公告)日：2024-04-23
申请号：US17274671
申请日：2020-03-16
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Tomoya Ishii , Kazunori Ishihara , Takeshi Iwaki
IPC分类号： B60P1/16 , F15B15/20
CPC分类号： B60P1/16 , F15B15/20 , F15B2211/605
摘要： When a tilt in a right-and-left direction occurs in a cargo bed (9) being raised due to imbalance of excavated materials, the tilt is detected as a roll angle (θR), and it is determined whether the absolute value (|θR|) of the roll angle is not less than an imbalance determination value (θ2) (S4). When the absolute value is not less than the imbalance determination value (θ2) (Yes in S4) and the roll angle (θR) is positive (the cargo bed (9) is rising to the right) (Yes in S8), an oil supply amount (VL) to a hoist cylinder (11) on the left side is increased, and an oil supply amount (VR) to a hoist cylinder (12) on the right side is decreased (S9). When the roll angle (θR) is negative (the cargo bed (9) is rising to the left) (No in S8), the oil supply amount (VL) on the left side is decreased, and the oil supply amount (VR) on the right side is increased (S10).

20. 发明公开

US20240102266A1 CONSTRUCTION MACHINE 审中-公开
公开(公告)号：US20240102266A1
公开(公告)日：2024-03-28
申请号：US18024098
申请日：2021-10-19
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shinji ISHIHARA , Shiho IZUMI , Yasuhiko KANARI
IPC分类号： E02F9/26 , E02F3/43
CPC分类号： E02F9/265 , E02F3/43
摘要： A construction machine includes an angle measuring apparatus that sense acceleration and angular velocities of installation portions on a machine body and a work implement and that compute angles of the installation portions relative to a reference plane based on sensing results, and a controller that executes operation assistance of a work implement based on postural information on the machine body and the work implement computed on the basis of the angles from the angle measuring apparatus. The controller computes second required accuracy of angle computation by the angle measuring apparatus on the basis of first required accuracy set for the operation assistance, determines whether the state of the machine body has changed from an active state to a stopped state on the basis of the sensing results of the angle measuring apparatus, determines whether the computation accuracy of the angle measuring apparatus satisfies the second required accuracy, and stops the operation assistance of the work implement or gives a warning in a case where the state of the machine body has changed to a stopped state, and where the computation accuracy fails to satisfy the second required accuracy.

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