专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP4375516A1 WORK MACHINE 失效
公开(公告)号：EP4375516A1
公开(公告)日：2024-05-29
申请号：EP22924036.1
申请日：2022-10-31
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI, Kento , IMURA, Shinya , TSURUGA, Yasutaka , CHIBA, Takaaki , YAMAMOTO, Shinjirou , AMANO, Hiroaki , NISHIKAWA, Shinji , NARAZAKI, Akihiro
IPC分类号： F15B11/00 , E02F9/22 , F15B11/028 , F15B11/042 , F15B11/044
CPC分类号： F15B11/042 , F15B11/028 , F15B11/00 , F15B11/044 , E02F9/22
摘要： An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.

2. 发明公开

EP4279663A1 CONSTRUCTION MACHINE 审中-实审
公开(公告)号：EP4279663A1
公开(公告)日：2023-11-22
申请号：EP21935194.7
申请日：2021-12-16
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NISHIKAWA, Shinji , YAMASHITA, Ryohei , NARAZAKI, Akihiro
IPC分类号： E02F9/20 , E02F9/26 , G08B5/00 , H04Q9/00
摘要： A machine controller that controls an action of the construction machine; an external operation controller that controls unmanned operation that does not require operation by an operator riding in an operation room, by generating a control signal according to an operation signal received from an outside via a communication terminal, and sending the control signal to the machine controller; an approach permission signaling light that signals permission for a worker to approach the construction machine; and an action request signaling light that signals a request for riding in the operation room and performing a particular action to a nearby worker are provided, and the external operation controller is configured to control the approach permission signaling light to be turned on when it is decided that approach of the worker to the construction machine can be tolerated according to information collected by the machine controller, and also control the action request signaling light to be turned on when it is decided that it is necessary to request a nearby worker to take a particular action. Thereby, it is possible to succinctly notify nearby workers and a manager of a machine-body action state, and to realize both the safety and work efficiency of the workers near the machine body and the manager.

3. 发明公开

EP4001670A1 WORK MACHINE 审中-实审
公开(公告)号：EP4001670A1
公开(公告)日：2022-05-25
申请号：EP21775095.9
申请日：2021-03-12
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI, Kento , IMURA, Shinya , TSURUGA, Yasutaka , CHIBA, Takaaki , AMANO, Hiroaki , NISHIKAWA, Shinji , NARAZAKI, Akihiro
IPC分类号： F15B21/045 , E02F9/22
摘要： A work machine that can keep the control accuracy of actuators irrespective of temperature variation of a hydraulic operating fluid that passes through flow rate controllers that control the flow rates of supply to the actuators is provided. For this purpose, the flow rate controllers each have a valve body that is disposed on a main hydraulic line connecting a delivery line of a hydraulic pump and the actuator and that moves according to an operation pressure from a solenoid proportional pressure reducing valve, a sampling hydraulic line that branches from the main hydraulic line, and a temperature sensor set on the sampling hydraulic line. The controller is configured to correct a command electrical signal to the solenoid proportional pressure reducing valve according to a signal from the temperature sensor.

4. 发明授权

EP3396074B1 HYBRID-TYPE WORKING MACHINE COMPRISING A HYDRAULIC PUMP CONTROLLER 有权
公开(公告)号：EP3396074B1
公开(公告)日：2020-11-18
申请号：EP16878054.2
申请日：2016-09-02
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： AMANO, Hiroaki , IMURA, Shinya , YAMASHITA, Ryouhei , ISHIHARA, Shinji , NISHIKAWA, Shinji , HITA, Masafumi
IPC分类号： E02F9/20 , B60K6/36 , B60K6/48 , B60W10/26 , F04B49/06 , F04B49/12 , B60L1/00 , B60K6/28 , B60K6/485 , E02F9/22 , F04B49/08 , F04B49/10 , B60L50/16

5. 发明公开

EP4293236A1 WORK MACHINE 审中-实审
公开(公告)号：EP4293236A1
公开(公告)日：2023-12-20
申请号：EP21931579.3
申请日：2021-03-18
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： AMANO, Hiroaki , KUMAGAI, Kento , OOHIRA, Hiroto , NISHIKAWA, Shinji , NARAZAKI, Akihiro , KODAKA, Katsuaki
IPC分类号： F15B11/042
摘要： A work machine includes: a main circuit that supplies a working fluid from a pump to an actuator; a pilot circuit that introduces part of the working fluid from the pump, to a pilot pressure receiving section of a control valve; a bleed-off passage that connects the pump and a tank. The pilot circuit is provided with: a first pressure reducing valve that generates a pilot primary pressure; and second and third pressure reducing valves that generate a pilot secondary pressure to be applied to the control valve and a bleed-off valve. A moving area of a spool of the bleed-off valve has a first moving area where an opening area of a restrictor changes stepwise, and a second moving area where the opening area of the restrictor changes continuously. A controller controls the third pressure reducing valve such that the spool is positioned in the first moving area at the time of non-operation of the actuator, and the spool is positioned in the second moving area at the time of operation of the actuator. The restrictor of the bleed-off valve has a restricting hole that gives a resistance to the working fluid passing therethrough in a case the spool is positioned in the first moving area.

6. 发明公开

EP4012113A1 WORK MACHINE 审中-实审
公开(公告)号：EP4012113A1
公开(公告)日：2022-06-15
申请号：EP21779716.6
申请日：2021-03-18
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI, Kento , IMURA, Shinya , TSURUGA, Yasutaka , CHIBA, Takaaki , AMANO, Hiroaki , NISHIKAWA, Shinji , NARAZAKI, Akihiro , SUGIYAMA, Genroku , YAMAMOTO, Shinjiro
IPC分类号： E02F9/20 , F15B11/024 , F15B11/042 , F15B11/08
摘要： Provided is a work machine which can increase the operation speed of an actuator by a regeneration function while securing the position control accuracy of the actuator. A controller is configured to calculate a regeneration flow rate on the basis of an input amount of an operation lever and a target actuator flow rate, subtract the regeneration flow rate from the target actuator flow rate to calculate a target actuator supply flow rate, calculate a target flow rate control valve opening amount on the basis of the target actuator supply flow rate, calculate a target pump flow rate that is equal to or higher than a total target actuator supply flow rate, control a selector valve on the basis of the input amount of the operation lever, control a flow rate control valve according to the target flow rate control valve opening amount, and control a hydraulic pump according to the target pump flow rate.

7. 发明公开

EP4012108A1 WORK MACHINE 审中-实审
公开(公告)号：EP4012108A1
公开(公告)日：2022-06-15
申请号：EP20927965.2
申请日：2020-11-02
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： KUMAGAI, Kento , IMURA, Shinya , TSURUGA, Yasutaka , CHIBA, Takaaki , AMANO, Hiroaki , NISHIKAWA, Shinji , NARAZAKI, Akihiro , SUGIYAMA, Genroku
IPC分类号： E02F3/43 , E02F9/22 , E02F9/26 , F15B11/044
摘要： Provided is a work machine which can achieve both of excellent operability when an operator manually operates a machine body or a work device and an accuracy of control of the machine body or the work device when a controller performs automatic control. The controller is configured to, in a case where the automatic control function selector switch gives an instruction to disable the automatic control function, adjust an opening amount of a bleed-off valve to a maximum opening amount or an opening amount corresponding to input amounts of control levers, and in a case where the automatic control function selector switch gives the instruction to enable the automatic control function, adjust the opening amount of the bleed-off valve, in at least part of an operation region of the control levers, so as to be smaller than the opening amount with the instruction to disable the automatic control function being given.

8. 发明授权

EP2698479B1 DISPLAY DEVICE OF WORKING MACHINE 有权转让
公开(公告)号：EP2698479B1
公开(公告)日：2018-06-13
申请号：EP12772007.6
申请日：2012-04-06
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NISHIKAWA, Shinji , ISHIKAWA, Kouji , OOKI, Takatoshi , NAKAMURA, Keiichiro
IPC分类号： E02F9/26 , E02F9/20 , E02F9/22
CPC分类号： E02F9/26 , E02F9/2066 , E02F9/2296
摘要： Disclosed is a display device 5 for a work machine having an engine 9, a hydraulic pump 10 driven by the engine, a boom cylinder 3d, an arm cylinder 3e, a bucket cylinder 3f, and other actuators driven by a hydraulic fluid supplied from the hydraulic pump 10, and an operating device 6 for operating the actuators 3d, 3e, 3f. The display device 5 includes an idle state display section 50a for displaying an engine revolution speed N as no-manipulation period operating state information which is related to an engine load that is imposed while the operating device 6 is not manipulated. This makes it possible to inform an operator of the status of the engine load in an idle state for the purpose of prompting the operator to transition into a fuel-efficient state.

9. 发明公开

EP3040483A1 WORKING MACHINE 有权转让
标题翻译：工作机器
公开(公告)号：EP3040483A1
公开(公告)日：2016-07-06
申请号：EP14840726.5
申请日：2014-08-28
申请人： Hitachi Construction Machinery Co., Ltd
发明人： IMURA, Shinya , ISHIKAWA, Kouji , NISHIKAWA, Shinji , KANETA, Tomoaki , IZUMI, Shiho
IPC分类号： E02F9/20
摘要： Provided is a work machine using a hydraulic motor and an electric motor to drive a swing structure, the work machine being adapted to reduce fuel consumption in regions where swinging by the hydraulic motor is prone to deteriorate in efficiency, such as when an operating stroke of swinging is small.
The work machine includes an engine, a hydraulic pump driven by the engine, a swing structure, an electric motor for driving the swing structure, a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and a swing control lever device that commands the swing structure to be driven. The work machine further includes a control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure.
摘要翻译：本发明提供一种作业机械，该作业机械使用液压马达和电动马达来驱动旋转体，该作业机械在由液压马达进行的摆动的效率容易恶化的区域，摆动很小。作业机械包括发动机，由发动机驱动的液压泵，旋转体，用于驱动旋转体的电动机，用于驱动旋转体的液压马达，由液压泵驱动的液压马达，控制杆装置，其命令摆动结构被驱动。作业机械还具有控制装置，该控制装置以主要通过电动机的转矩驱动旋转体的电动旋转模式或主要通过液压电动机的转矩驱动旋转体的液压旋转模式控制杆装置的操作行程和/或摆动结构的摆动速度。

10. 发明公开

EP2952638A3 HYBRID CONSTRUCTION MACHINE 有权
公开(公告)号：EP2952638A3
公开(公告)日：2016-03-02
申请号：EP15170506.8
申请日：2015-06-03
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： NISHIKAWA, Shinji , ISHIKAWA, Kouji , SATAKE, Hidetoshi , IMURA, Shinya , IZUMI, Shiho
IPC分类号： E02F9/12 , E02F9/20 , E02F9/22 , F15B11/08 , F15B11/042
CPC分类号： F15B11/042 , E02F9/123 , E02F9/2095 , E02F9/2203 , E02F9/2228 , E02F9/2282 , E02F9/2296 , F15B11/08 , F15B2211/20515 , F15B2211/30525 , F15B2211/3059 , F15B2211/6306 , F15B2211/6346 , F15B2211/6355 , F15B2211/6654 , F15B2211/7058 , F15B2211/7135 , F15B2211/75
摘要： An object of the present invention is to provide a hybrid construction machine having a hydraulic motor (3) and an electric motor (14) as driving sources for a swing structure (50), the hybrid construction machine being configured to provide the operator with high manipulability during combined swing operation.
This invention provides a hybrid construction machine including a swing structure (50), a hydraulic pump (1), a hydraulic swing motor (3) driving the swing structure (50) using hydraulic fluid from the hydraulic pump (1), an electric swing motor (14) driving the swing structure (50) in conjunction with the hydraulic swing motor (3), a boom cylinder (16) operated simultaneously with the swing structure (50) at times and driven by the hydraulic fluid from the hydraulic pump (1), a first directional control valve (28) controlling flow of the hydraulic fluid supplied from the hydraulic pump (1) to the hydraulic swing motor (3), a second directional control valve (29) controlling the flow of the hydraulic fluid returning from the hydraulic swing motor (3), and a controller (13) and solenoid pressure reducing valves which prevent operation of the second directional control valve (29) when the boom cylinder (16) is operated simultaneously with the swing structure (50).

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式