公开(公告)号：US10858804B2

公开(公告)日：2020-12-08

申请号：US15998946

申请日：2017-03-02

Applicant: HITACHI CONSTRUCTION MACHINERY CO. LTD.

Inventor： Hiroki Takeuchi ,  Kouji Ishikawa ,  Shiho Izumi ,  Shuuichi Meguriya ,  Tarou Akita

IPC: E02F9/20 ,  E02F3/43 ,  E02F9/22 ,  E02F9/26 ,  F15B11/04

Abstract: A work machine including a front control section configured to calculate a limit command value for restricting an operation of a front work implement includes: for example, a bypass line that bypasses, for example, the proportional solenoid valve in, for example, the pilot line; for example, a bypass valve disposed in, for example, the bypass line; a switch configured to output a signal to turn on or off control by the front control section; an on/off determining part configured to determine whether the signal from the switch is an on signal that brings front control into an on state or an off signal that brings the front control into an off state; an open/close command part configured to generate an open/close command signal to open the bypass valve when the signal is determined to be the off/off signal.

公开(公告)号：US11313107B2

公开(公告)日：2022-04-26

申请号：US16639793

申请日：2018-10-30

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Teruki Igarashi ,  Shiho Izumi ,  Ryu Narikawa ,  Shuuichi Meguriya ,  Hiroki Takeuchi

IPC: E02F9/26 ,  E02F3/32 ,  E02F3/43 ,  E02F9/20 ,  E02F9/22

Abstract: A controller outputs a first velocity (first limiting velocity) as a limiting velocity for a boom cylinder when a boom lowering operation amount is smaller than a first operation amount, and outputs a second velocity when the boom lowering operation amount is equal to or larger than the first operation amount. The first velocity is set to decrease according to a decrease in a target surface distance. The second velocity is defined by a weighted average of the first velocity and a third velocity (second limiting velocity) set to change according to one of the target surface distance and the boom lowering operation amount of the operation device, and is set such that an increase in the boom lowering operation amount reduces a weight for the first velocity while increasing a weight for the third velocity.

公开(公告)号：US11066808B2

公开(公告)日：2021-07-20

申请号：US16320504

申请日：2017-10-31

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Hiroki Takeuchi ,  Kouji Ishikawa ,  Shiho Izumi ,  Shuuichi Meguriya ,  Tarou Akita

IPC: E02F3/43 ,  E02F9/22 ,  F15B11/046 ,  F15B11/08 ,  F15B21/02

Abstract: A work machine includes: control valves that control flows of a hydraulic operating oil supplied to actuators; operation lever devices that generate hydraulic signals to be output to the corresponding control valves according to an operation; solenoid proportional valves that reduce pressure of the hydraulic signals generated by the corresponding operation lever devices; and a front implement control section that controls the solenoid proportional valves. The work machine further includes: operation signal lines connected to the operation lever devices; signal input lines connected to the control valves; pressure reducing lines provided with the solenoid proportional valves; and selector valves that have a first position that interrupts connection of the operation signal lines and the pressure reducing lines and directly connects the operation signal lines to the signal input lines, and a second position that connects the operation signal lines to the signal input lines via the pressure reducing lines.

公开(公告)号：US11885097B2

公开(公告)日：2024-01-30

申请号：US17275777

申请日：2020-03-17

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Shuuichi Meguriya ,  Shiho Izumi

IPC: E02F3/43 ,  E02F9/26 ,  E02F9/20

CPC classification number: E02F3/437 ,  E02F3/439 ,  E02F9/262 ,  E02F9/265 ,  E02F9/2029 ,  E02F9/2033

Abstract: A controller 20 mounted on a hydraulic excavator 1 that is able to perform machine control transmits work situation parameters (machine body position, hydraulic working fluid temperature, bucket weight, and target surface gradient) to a management server 71, receives, from the management server, control command correction values that are calculated by the management server on the basis of the work situation parameters and that represent correction values for correcting control commands, and controls hydraulic actuators 5, 6, and 7 with corrected control commands that represent the control commands corrected on the basis of the control command correction values.

公开(公告)号：US11466435B2

公开(公告)日：2022-10-11

申请号：US16919313

申请日：2020-07-02

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Shiho Izumi ,  Shuuichi Meguriya ,  Ryuu Narikawa ,  Kouji Ishikawa ,  Tarou Akita

IPC: E02F9/22 ,  F02D29/02 ,  E02F3/43 ,  E02F9/20 ,  F02D29/04

Abstract: 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.

公开(公告)号：US11970840B2

公开(公告)日：2024-04-30

申请号：US15734593

申请日：2019-03-27

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Hiroki Takeuchi ,  Shiho Izumi ,  Ryu Narikawa ,  Shuuichi Meguriya ,  Teruki Igarashi

IPC: E02F9/26 ,  E02F3/32 ,  E02F3/43 ,  E02F9/20 ,  E02F9/22 ,  F15B15/14

CPC classification number: E02F9/265 ,  E02F3/32 ,  E02F3/435 ,  E02F9/2004 ,  E02F9/2203 ,  E02F9/2271 ,  E02F9/262 ,  F15B15/14 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296

Abstract: An articulated-type front work implement has a boom, an arm, and a bucket that are driven members coupled to each other; a boom cylinder, an arm cylinder and a bucket cylinder that are hydraulic actuators each of which drives a corresponding one of the plurality of driven members on the basis of an operation signal; a plurality of operation members each outputting the operation signal to one of the hydraulic actuators; and a controller that outputs the operation signal to at least one of the plurality of hydraulic actuators or executes area limiting control of correcting the output operation signal such that the front work implement moves on a target surface preset for a work target of the front work implement or within an area above the target surface, and corrects the operation signal on the basis of information related to operation of the hydraulic actuator.

公开(公告)号：US11639593B2

公开(公告)日：2023-05-02

申请号：US16493316

申请日：2018-08-24

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Shuuichi Meguriya ,  Ryu Narikawa ,  Hiroki Takeuchi

IPC: E02F9/20 ,  E02F3/43 ,  E02F9/22 ,  E02F9/26

Abstract: 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.

公开(公告)号：US09725874B2

公开(公告)日：2017-08-08

申请号：US15025357

申请日：2014-11-13

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Shuuichi Meguriya ,  Yasuhiko Kanari ,  Takahiko Kurose

IPC: G06F7/70 ,  G06F19/00 ,  G06G7/00 ,  G06G7/76 ,  E02F3/43 ,  E02F9/22 ,  E02F9/26 ,  E02F3/32 ,  E02F3/42 ,  E02F9/20

CPC classification number: E02F3/437 ,  E02F3/32 ,  E02F3/425 ,  E02F9/2004 ,  E02F9/2033 ,  E02F9/2225 ,  E02F9/2285 ,  E02F9/265

Abstract: An area limiting excavation control system for construction machines including a control unit (9) that performs area limiting control by controlling at least one of a plurality of hydraulic cylinders (3a, 3b, 3c) on the basis of a posture and a position of each of a boom (1a), an arm (1b), and a bucket (1c). The control system includes an angle sensor group (8) that detects rotational angles of the boom (1a), the arm (1b), and the bucket (1c), and a tilting angle sensor group (81) that detects ground angles of the boom (1a), the arm (1b), and the bucket (1c). The control unit (9) selects, from among the angle sensor group (8) and the tilting angle sensor group (81), a sensor to be used for calculating a posture and a position of each of the boom (1a), the arm (1b), and the bucket (1c) in accordance with a magnitude of speed of at least one of the boom (1a), the arm (1b), and the bucket (1c).

公开(公告)号：US09469969B2

公开(公告)日：2016-10-18

申请号：US14769121

申请日：2014-09-10

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Yasuhiko Kanari ,  Akinori Ishii ,  Shuuichi Meguriya ,  Eiji Egawa

IPC: E02F9/20 ,  E02F3/43 ,  E02F9/26

CPC classification number: E02F9/2037 ,  E02F3/435 ,  E02F9/2033 ,  E02F9/262 ,  E02F9/265

Abstract: A basic information calculator device calculates basic information for area limiting excavation control to control a construction machinery work device so that the construction machinery does not perform excavation beyond a target excavation surface. The basic information calculator includes: a storage device having stored therein three-dimensional information of the target excavation surface; a two-dimensional information extractor for obtaining the intersecting line between a reference surface that is the target excavation surface and the operational plane of the work device based on the three-dimensional information and the current positional information of the construction machinery to extract a reference line that is the intersecting line as the two-dimensional information of the reference surface in the operational plane; and a characteristic point transmitter for transmitting the Z-coordinates of characteristic points on the reference line to an area limiting excavation controller as the basic information.

Abstract translation: 基本信息计算器装置计算区域限制挖掘控制的基本信息，以控制施工机械作业装置，使得施工机械不进行超过目标挖掘面的挖掘。 基本信息计算器包括：存储有目标挖掘面的三维信息的存储装置; 二维信息提取器，用于基于三维信息获得作为目标挖掘面的基准面与作业装置的操作面之间的交线，以及施工机械的当前位置信息，以提取参考线 即作为操作平面中的参考表面的二维信息的相交线; 以及用于将参考线上的特征点的Z坐标传送到区域限制挖掘控制器作为基本信息的特征点发射器。