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31. 发明授权

US10006473B2 Hybrid construction machine 有权
公开(公告)号：US10006473B2
公开(公告)日：2018-06-26
申请号：US14729364
申请日：2015-06-03
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , Takako Satake
发明人： Shinji Nishikawa , Kouji Ishikawa , Hidetoshi Satake , Shinya Imura , Shiho Izumi
IPC分类号： F15B11/042 , E02F9/12 , E02F9/20 , E02F9/22 , F15B11/08
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： This invention provides a hybrid construction machine including a swing structure, a hydraulic pump, a hydraulic swing motor driving the swing structure using hydraulic fluid from the hydraulic pump, an electric swing motor driving the swing structure in conjunction with the hydraulic swing motor, a boom cylinder operated simultaneously with the swing structure at times and driven by the hydraulic fluid from the hydraulic pump, a first directional control valve controlling flow of the hydraulic fluid supplied from the hydraulic pump to the hydraulic swing motor, a second directional control valve controlling the flow of the hydraulic fluid returning from the hydraulic swing motor, and a controller and solenoid pressure reducing valves which prevent operation of the second directional control valve when the boom cylinder is operated simultaneously with the swing structure.

32. 发明授权

US09890518B2 Hydraulic drive system for construction machine 有权
公开(公告)号：US09890518B2
公开(公告)日：2018-02-13
申请号：US14431062
申请日：2013-10-15
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Kensuke Sato , Tsuyoshi Nakamura , Kouji Ishikawa
IPC分类号： E02F9/22 , F15B21/14 , E02F9/20 , F15B11/024
CPC分类号： E02F9/2217 , E02F9/2075 , E02F9/2095 , E02F9/2221 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F15B11/024 , F15B21/14 , F15B2011/0246 , F15B2211/20515 , F15B2211/20569 , F15B2211/20576 , F15B2211/3058 , F15B2211/40515 , F15B2211/41527 , F15B2211/41563 , F15B2211/6313 , F15B2211/6316 , F15B2211/88
摘要： During boom-midair lowering operation in which a front work implement 130 can be turned under the self-weight of a boom 131, a hydraulic pump/motor 7 is operated as a motor to operate a generator/electric motor 10 as a generator. Power generation operation is performed by the hydraulic fluid discharged from a bottom-side chamber 5b of a boom cylinder 5 to recover positional energy. During jack-up in which the front work implement 130 cannot be turned under the self-weight of the boom 131, the generator/electric motor 10 is operated as an electric motor to operate the hydraulic pump/motor 7 as a pump. The jack-up is performed by supplying the hydraulic fluid from the bottom-side chamber 5b to rod-side chamber 5a of the boom cylinder 5 without supplying the hydraulic fluid from the main pump 2 to the rod-side chamber 5a of the boom cylinder 5.

33. 发明授权

US09777463B2 Construction machine 有权
公开(公告)号：US09777463B2
公开(公告)日：2017-10-03
申请号：US14767423
申请日：2014-08-20
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , Takako Satake
发明人： Shiho Izumi , Shinya Imura , Hidetoshi Satake , Kouji Ishikawa , Tomoaki Kaneta , Hiroaki Amano , Shinji Nishikawa
IPC分类号： E02F9/20 , E02F9/22 , H02P6/08 , E02F9/12 , F04B49/00 , B60L1/00
CPC分类号： E02F9/2235 , B60L1/00 , E02F9/123 , E02F9/2004 , E02F9/2075 , E02F9/2091 , E02F9/2095 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F04B49/002 , H02P6/08 , Y02T10/642
摘要： A construction machine, comprising a hydraulic pump, a swing hydraulic motor, a swing electric motor, a delivery capacity regulating device, and a control unit which controls the driving/braking of the swing structure, is configured to comprise an operation amount detection device for detecting the operation amount of the swing control lever and a speed detection device for detecting the speed of the swing electric motor. The control unit includes a hydraulic pump output reduction control unit which takes in an operation amount signal representing the operation amount of the swing control lever detected by the operation amount detection device and a speed signal representing the speed of the swing electric motor detected by the speed detection device and controls the delivery capacity regulating device by calculating a reduction rate of the output of the hydraulic pump based on the detection signals.

34. 发明授权

US09725878B2 Hybrid-type construction machine 有权
公开(公告)号：US09725878B2
公开(公告)日：2017-08-08
申请号：US14915304
申请日：2014-09-18
申请人： Hitachi Construction Machinery Co., Ltd. , Takako Satake
发明人： Hiroaki Amano , Kouji Ishikawa , Hidetoshi Satake , Shinya Imura , Shinji Nishikawa , Tomoaki Kaneta , Shiho Izumi
IPC分类号： E02F9/12 , E02F9/20 , E02F9/22 , E02F3/32
CPC分类号： E02F9/123 , B60Y2200/416 , E02F3/32 , E02F9/20 , E02F9/2004 , E02F9/2095 , E02F9/2246
摘要： Provided is a hybrid-type construction machine including a swing device of the hydraulic-electric combined swing type and by which, in a work for which accurate swing operability is demanded like, for example, a crane work, a swing body is driven alone by the electric motor.The hybrid-type construction machine includes an engine, a hydraulic pump driven by the engine, a swing body, an electric motor for driving the swing body, and a hydraulic motor driven by the hydraulic pump for driving the swing body. The swing body is swung by simultaneous drive by the electric motor and the hydraulic motor. The hybrid-type construction machine includes a control apparatus having a work mode changeover unit by which an operator changes over a mode in response to an aspect of a work and an electric alone swing controlling unit configured to control the swing body to be swung by the electric motor alone. When a work in which position accuracy is demanded is selected by the work mode changeover unit, the swing body is swung by the electric alone swing controlling unit.

35. 发明申请

US20150300378A1 Hydraulic Control Device for Work Machine 审中-公开
标题翻译：工作机液压控制装置
公开(公告)号：US20150300378A1
公开(公告)日：2015-10-22
申请号：US14441048
申请日：2013-11-05
申请人： Takako Satake , Hitachi Construction Machinery Co., Ltd.
发明人： Tsutomu Udagawa , Akira Nakayama , Ryohei Yamashita , Shiho Izumi , Manabu Edamura , Kouji Ishikawa , Hidetoshi Satake
IPC分类号： F15B11/028 , E02F9/22
CPC分类号： F15B11/028 , E02F3/32 , E02F9/22 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F15B11/0423 , F15B2211/20546 , F15B2211/251 , F15B2211/30525 , F15B2211/3111 , F15B2211/365 , F15B2211/6309 , F15B2211/633 , F15B2211/6333 , F15B2211/6346 , F15B2211/6652 , F15B2211/6653 , F15B2211/6654
摘要： The energy efficiency is increased by reducing the throttle/relief loss in the delivery flow of the hydraulic pump caused by the bleed-off control, while also making it possible to control the delivery pressure of the hydraulic pump according to the operation amount of the control lever unit and improving the operational performance. A controller 6 includes a target pump pressure setting unit 32 which calculates a target pump delivery pressure which increases with the increase in an operation amount signal from an operation amount detector 20A/20B based on the operation amount signal and a pump flow rate upper limit setting unit 33 which calculates a pump flow rate upper limit which increases with the increase in the operation amount signal based on the operation amount signal. The tilt amount of the hydraulic pump 2 is controlled based on the target pump delivery pressure calculated by the target pump pressure setting unit 32, the pump flow rate upper limit calculated by the pump flow rate upper limit setting unit 33, and the delivery pressure of the hydraulic pump 2 detected by a pressure detector 21.
摘要翻译：通过减少由排出控制引起的液压泵的输送流量中的节流/减压损失，能够提高能量效率，同时还可以根据控制的操作量来控制液压泵的输送压力杠杆单元，提高操作性能。控制器6包括目标泵压力设定单元32，该目标泵压力设定单元32基于操作量信号和泵流量上限设定来计算随着来自操作量检测器20A / 20B的操作量信号的增加而增加的目标泵输送压力单元33，其基于操作量信号计算随着操作量信号的增加而增加的泵流量上限。基于由目标泵压力设定单元32计算出的目标泵输送压力，由泵流量上限设定单元33计算的泵流量上限，以及泵流量上限设定单元33的输出压力来控制液压泵2的倾斜量液压泵2由压力检测器21检测。

36. 发明申请

US20150139768A1 CONSTRUCTION MACHINE 审中-公开
标题翻译：建筑机械
公开(公告)号：US20150139768A1
公开(公告)日：2015-05-21
申请号：US14401563
申请日：2013-05-21
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shuji Egawa , Hidetoshi Satake , Kouji Ishikawa , Mitsugu Ojima
IPC分类号： E02F9/08 , E02F9/18
CPC分类号： E02F9/0808 , B66C23/74 , E02F9/0816 , E02F9/0858 , E02F9/0891 , E02F9/18
摘要： A left weight mounting part (16) and a right weight mounting part (17) are provided with rear ends of a left vertical plate (8) and a right vertical plate (9) of a main frame (6), and a placing plate (24) adapted to place a battery (29) thereon is provided between the left weight mounting part (16) and the right weight mounting part (17). An accommodating groove (25G) is provided in a counterweight (25) by notching, in a front-rear direction, a part that faces the placing plate (24) in an up-down direction. A space (26A) formed by the placing plate (24) and the accommodating groove (25G) can be configured as an article accommodating room (26) that accommodates the battery (29).
摘要翻译：左重量安装部分（16）和右重量安装部分（17）设置有主框架（6）的左垂直板（8）和右垂直板（9）的后端，以及放置板（24）适于将电池（29）放置在其上，设置在左重量安装部分（16）和右重量安装部分（17）之间。在配重（25）中，通过在前后方向上沿着上下方向对着所述放置板（24）的部分进行切口而设置有容纳槽（25G）。由放置板（24）和容纳槽（25G）形成的空间（26A）可以构成为容纳电池（29）的物品收纳室（26）。

37. 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.

38. 发明授权

US10907666B2 Hydraulic drive system 有权
公开(公告)号：US10907666B2
公开(公告)日：2021-02-02
申请号：US15755342
申请日：2016-09-29
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Seiji Hijikata , Yasutaka Tsuruga , Kenji Hiraku , Kouji Ishikawa
IPC分类号： F15B21/14 , F15B1/02 , A01B63/10
摘要： It is an object of the present invention to provide a hydraulic drive system that effectively utilizes a hydraulic fluid accumulated in an accumulator to make it possible to achieve a substantial improvement in terms of efficiency for a work machine as a whole. A hydraulic drive system includes: a first hydraulic pump; a first hydraulic actuator driven by being supplied with a hydraulic fluid from the first hydraulic pump; a first line for supplying the hydraulic fluid from the first hydraulic pump to the first hydraulic actuator; a first pump flow adjustment device installed in the first line, the first pump flow adjustment device being configured to adjust; a first hydraulic accumulator for accumulating the hydraulic fluid delivered from the first hydraulic pump; and a first accumulation flow adjustment device configured to adjust the flow of the hydraulic fluid from the first hydraulic pump to the first hydraulic accumulator. The hydraulic drive system further comprises a first accumulation flow supply device configured to supply the hydraulic fluid accumulated in the first hydraulic accumulator to the first hydraulic actuator via a second line different from the first line.

39. 发明授权

US10801532B2 Work machine 有权
公开(公告)号：US10801532B2
公开(公告)日：2020-10-13
申请号：US16327928
申请日：2017-03-29
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Yuichi Ogawa , Seiji Hijikata , Masatoshi Hoshino , Kiwamu Takahashi , Kouji Ishikawa
IPC分类号： F15B21/14 , E02F9/22 , E02F9/20 , E02F3/42 , E02F3/43 , F15B11/10 , F15B1/02 , E02F3/32 , F15B21/047 , F15B21/044 , F15B21/08 , F15B1/033
摘要： A work machine including: a hydraulic cylinder 20 configured to drive a work implement 3; a control valve 22 configured to connect a delivery line of a hydraulic pump 21 switchingly to a bottom fluid chamber and a rod fluid chamber of the hydraulic cylinder 20 and a tank; a pilot pump 23 configured to output a pilot pressure to drive the control valve 22; an engine 24 configured to drive the hydraulic pump 21 and the pilot pump 23; and an accumulator 26 configured to accumulate a return hydraulic fluid from the hydraulic cylinder 20 is provided with: a bypass line 41 configured to connect the bottom fluid chamber of the hydraulic cylinder 20 and a delivery line 21a of the hydraulic pump 21 by bypassing the control valve 22 and be provided with the accumulator 26 thereon; a pressure-accumulation control valve 27 provided between the bottom fluid chamber of the hydraulic cylinder 20 and the accumulator 26; a release control valve 28 provided between the accumulator 26 and the delivery line 21a; and a hydraulic system controller 30 configured to open the release control valve 28 if an engine revolution speed N becomes lower than a set value Ns.

40. 发明授权

US10563378B2 Hydraulic system for work machines 有权
公开(公告)号：US10563378B2
公开(公告)日：2020-02-18
申请号：US15554536
申请日：2015-09-25
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hidekazu Moriki , Shinya Imura , Shiho Izumi , Hiroaki Amano , Kouji Ishikawa
IPC分类号： E02F9/22
摘要： A hydraulic system for a work machine includes a first hydraulic pump driving a swing hydraulic motor; a second hydraulic pumps driving a boom cylinder; a first pump displacement increase valve controlling a volume of the first hydraulic pump; a swing pilot pressure sensor detecting a swing operation amount; a boom raising pilot pressure sensor detecting a boom raising operation amount; and a controller controlling a control signal to the first pump displacement increase valve on the basis of the swing operation amount and the boom raising operation amount. The controller controls the control signal in such a manner that a delivery rate of the first hydraulic pump becomes higher as the swing operation amount is larger and an increasing rate of the delivery rate of the first hydraulic pump becomes lower as the boom raising operation amount is larger during a swing boom raising operation.

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