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1. 发明授权

US11639593B2 Work machine 有权
公开(公告)号：US11639593B2
公开(公告)日：2023-05-02
申请号：US16493316
申请日：2018-08-24
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shuuichi Meguriya , Ryu Narikawa , Hiroki Takeuchi
IPC分类号： E02F9/20 , E02F3/43 , E02F9/22 , E02F9/26
摘要： Provided is a work machine that can operate a front work implement at a speed according to an operator's lever operation while securing the accuracy of work by machine control. A hydraulic excavator 1 includes a controller 20 that sets a target surface for a bucket 10 and controls the operation of a front work implement 1B in such a manner that the bucket does not penetrate to below the target surface. The controller sets a speed correction region on an upper side of the target surface, varies a width R of the speed correction region in accordance with an operation amount of an operation device 15A or 15C, and controls the operation of the front work implement in such a manner that the work tool does not penetrate into the speed correction region.

2. 发明申请

US20230123942A1 WORK MACHINE 有权
公开(公告)号：US20230123942A1
公开(公告)日：2023-04-20
申请号：US17910873
申请日：2021-04-09
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hisashi TAGO , Takenori HIROKI , Daiki MACHIDA , Naoki HAGIWARA , Taiki AIZAWA , Kouhei HASHIMOTO
IPC分类号： E02F9/26 , E02F9/24 , E02F9/20 , H04N5/765 , H04N7/18 , H04N5/265 , G06T11/00
摘要： A work machine includes: a machine body; an actuator attached to the machine body; an operation device used to operate the actuator; an operation sensor that senses an operation of the operation device; a photographing device that photographs surroundings of the machine body; a video data recording device that records video data including video photographed by the photographing device; a controller that controls the video data recording device; and an object sensor that senses an object in the surroundings of the machine body. The controller determines whether or not a recording and retaining condition including a condition that an object is present in the surroundings of the machine body and a condition that the operation device is operated is satisfied on the basis of a result of sensing in the object sensor and a result of sensing in the operation sensor, and makes the video data recording device record and retain the video data when the recording and retaining condition is satisfied.

3. 发明申请

US20230115070A1 WORKING MACHINE 有权
公开(公告)号：US20230115070A1
公开(公告)日：2023-04-13
申请号：US17909550
申请日：2021-09-30
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Takeshi SHIINA , Hiroshi KANEZAWA
IPC分类号： E02F9/26
摘要： A working machine, equipped with a working device that extends to the outside of a machine body, includes: a physical quantity detection sensor (that detects a physical quantity concerning the working machine; a monitor that displays predetermined information; and a controller that controls the monitor. The controller includes a stress calculation section that calculates a distribution of stress applied to the working device based on the physical quantity concerning the working machine, detected by the physical quantity detection sensor, and a display control section that controls the display of the predetermined information on the monitor. The display control section controls the display on the monitor so as to indicate the distribution of the stress applied to the working device, calculated by the stress calculation section, in conjunction with the movement of the working device.

4. 发明申请

US20230114481A1 Work Machine 有权
公开(公告)号：US20230114481A1
公开(公告)日：2023-04-13
申请号：US17909506
申请日：2021-05-26
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Kazushige KUROKAMI , Takaaki ISHII , Shigeki TOKITA , Hiroshi SAKAMOTO , Yoshiyuki TSUCHIE
IPC分类号： E02F9/24 , E02F9/26 , E02F9/20
摘要： A work machine includes: an informing device that informs an operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller; and a communication device that communicates with a mobile terminal carried by the worker. The controller determines whether or not an approval request for requesting approval of entry into a movable range of the work machine transmitted from the mobile terminal when the worker around the work machine operates the mobile terminal has been received; inform, by using the informing device, that the approval request has been received when it is determined that the approval request has been received; determine whether or not approval operation of approving entry into the movable range has been performed on the input device; set an interpersonal communication level representing a degree of interpersonal communication between the operator and the worker depending on whether or not the approval request has been received and whether or not the approval operation has been performed; decide a mode of notification in accordance with the interpersonal communication level; and give a notification in the mode of notification by using the notification device.

5. 发明申请

US20230091185A1 HYDRAULIC EXCAVATOR 有权
公开(公告)号：US20230091185A1
公开(公告)日：2023-03-23
申请号：US17801809
申请日：2021-01-27
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yusuke SUZUKI , Hiroaki TANAKA , Hisami NAKANO
IPC分类号： E02F3/43 , E02F9/26 , E02F3/32 , E02F9/22
摘要： A hydraulic excavator includes a traveling body, a slewing body, a working front having a boom, an arm, and a bucket, an operation amount detector, a posture detector, a load detector, a drive controller, and a drive unit. The drive controller calculates a target operation speed of the actuator based on the operation amount, the posture of the working front, and the target surface distance so that the bucket excavates along the construction target surface, and determines soil hardness of a place to be excavated based on a result detected by the load detector, corrects the target operation speed based on the soil hardness, and generates a motion command value. The drive controller determines a target jack-up speed when the hydraulic excavator jacks up based on the target surface distance, and corrects the target operation speed based on the determined target jack-up speed.

6. 发明申请

US20230085676A1 Construction Machine 有权
公开(公告)号：US20230085676A1
公开(公告)日：2023-03-23
申请号：US17908956
申请日：2021-10-18
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 , E02F9/20 , F15B1/04 , F15B13/02
摘要： The present invention provides a construction machine equipped with a pressure accumulation device that accumulates return oil from an actuator, and that can implement both improvement in fuel efficiency with enhancement in workability. To achieve the foregoing, a controller sets an actuator upper limit output power that is an upper limit for an output power of the actuator according to a work mode selected by a work mode selection device, and controls a first control valve and a second control valve such that a sum of an output power of a hydraulic pump and an output power of the pressure accumulation device does not exceed the actuator upper limit output power.

7. 发明申请

US20230084767A1 Construction Machine 有权
公开(公告)号：US20230084767A1
公开(公告)日：2023-03-16
申请号：US17802745
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 , F15B11/028 , F15B11/08
摘要： It is an object of the present invention to provide a construction machine capable of efficiently driving a hydraulic cylinder by an accumulator. Thus, the construction machine includes a first control valve disposed in a first hydraulic fluid line connecting a bottom-side fluid chamber of a hydraulic cylinder with an accumulator, and a second control valve disposed in a second hydraulic fluid line connecting a rod-side fluid chamber of the hydraulic cylinder with a tank. The construction machine further includes a third control valve disposed in a third hydraulic fluid line connecting the rod-side fluid chamber with the accumulator, and a fourth control valve disposed in a fourth hydraulic fluid line connecting a line part of the first hydraulic fluid line, which connects the bottom-side fluid chamber with the third control valve, and a line part of the third hydraulic fluid line, which connects the rod-side fluid chamber with the third control valve, with each other.

8. 发明申请

US20230004171A1 Work Vehicle 有权
公开(公告)号：US20230004171A1
公开(公告)日：2023-01-05
申请号：US17782036
申请日：2021-03-17
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Mikio BANDO , Shinichi UOTSU
IPC分类号： G05D1/02
摘要： The present disclosure provides a work vehicle that allows detecting an error in an installation position of an antenna more flexibly than a conventional device. The work vehicle includes a control device 150. The control device 150 has a detection function F106, a calculation function F104, a calculation function F105, a calculation function F107, and an estimation function F110. The detection function F106 detects steady traveling based on a velocity, an acceleration, and an angular velocity of a vehicle. The calculation function F104 calculates a first vehicle direction based on installation information of a first antenna and a second antenna with respect to the vehicle. The calculation function F105 calculates a second vehicle direction based on a time change of position information of the first antenna when the steady traveling is detected. The calculation function F107 calculates a direction correction parameter for correcting the first vehicle direction based on the second vehicle direction. The estimation function F110 estimates a location and a posture of the vehicle based on the direction correction parameter and the first vehicle direction.

9. 发明申请

US20220403878A1 Sliding Component and Method for Manufacturing Same 有权
公开(公告)号：US20220403878A1
公开(公告)日：2022-12-22
申请号：US17776007
申请日：2020-11-10
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hatsuhiko USAMI , Hideki AKITA , Shuichi KOBAYASHI , Shigeyuki SAKURAI , Wataru MINAMI
IPC分类号： F16C33/14 , F16C33/10 , F16C33/12
摘要： Provided is a sliding component having a low coefficient of friction and capable of exerting stable sliding characteristics from the initial stage of sliding, and a manufacturing method capable of easily manufacturing the sliding component. A sliding component (1) includes an iron substrate (10), in which graphite particles (13) are dispersed in an iron base (11), and a tin coating (20) formed on the iron substrate (10), the tin coating (20) including tin as a main material. The graphite particles (13) of the sliding component (1) are exposed through the tin coating (20). The manufacturing method includes: a preparation step of preparing an iron substrate (10) including graphite particles (13) dispersed in an iron base (11); and a film forming step of forming a tin coating (20) on the surface of the iron substrate (10), the tin coating (20) including tin as a main material. The film forming step forms the tin coating (20) so that the graphite particles (13) are exposed through the tin coating (20).

10. 发明申请

US20220356677A1 WORK VEHICLE 有权
公开(公告)号：US20220356677A1
公开(公告)日：2022-11-10
申请号：US17638296
申请日：2021-03-15
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yasunori MIYAMOTO , Tetsuji TANAKA
IPC分类号： E02F9/22 , E02F9/26 , F15B15/20
摘要： Provided is a work vehicle which can prevent an engine from stalling regardless of type of a system mounted on a vehicle body. In a wheel loader 1 equipped with a loading work device 11 operated by an electric operation lever 19, first and second directional control valves 5, 6 include neutral positions 5N, 6N for causing hydraulic oil discharged from a hydraulic pump 12 to return to a hydraulic oil tank 10, respectively, and in the case where a discharge pressure P of the hydraulic pump 12 is a main relief pressure Pr or more and an engine rotational speed N is less than a low idle rotational speed NL, a controller 2, 2A restricts the output of control signals to first and second solenoid control valves 3, 4 so as to cause the first and second directional control valves 5, 6 to be switched to the neutral positions 5N, 6N, respectively.

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