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81. 发明公开

EP3940149A1 ELECTRIC CONSTRUCTION MACHINE 审中-公开
公开(公告)号：EP3940149A1
公开(公告)日：2022-01-19
申请号：EP20769395.3
申请日：2020-01-29
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： KIHARA, Seiichi , TAKAHASHI, Kiwamu , ISHII, Takeshi
IPC分类号： E02F9/00
摘要： An electric hydraulic excavator (1) includes an automotive lower traveling structure (2) and
an upper revolving structure (3) mounted on the lower traveling structure (2) to be capable of revolving thereto. The upper revolving structure (3) includes a revolving frame (5) as a base, a counterweight (13) disposed on a rear side of the revolving frame (5), and an electric power source (9) that is positioned on a front side of the counterweight (13) to be mounted on the revolving frame (5) and is power-fed from an external electric current source. The counterweight (13) is provided with a cable insertion hole (16) as disposed therein. A power feeding cable (12) is inserted in the cable insertion hole (16) for connection between the external electric current source and the electric power source (9) .

82. 发明公开

EP3849047A1 ELECTRIC CONSTRUCTION MACHINE 审中-实审
公开(公告)号：EP3849047A1
公开(公告)日：2021-07-14
申请号：EP19858614.1
申请日：2019-05-23
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： ISHII, Takeshi , TAKAHASHI, Kiwamu , MAEHARA, Taihei , TAKISHITA, Tatsuo
IPC分类号： H02J7/02 , E02F9/00 , H02J3/14 , H02J13/00
摘要： An electrically driven construction machine is provided in which, in a case where a plurality of electrically driven construction machines operate simultaneously, it is possible to avoid exceeding the allowable electric power that can be output by the electric power receiving facility of a commercial electric power supply as an external electric power supply while distributing supplied electric power without a work imbalance between different machine bodies according to the respective demanded powers of the plurality of electrically driven construction machines thereby make it possible to perform work efficiently within an allowable electric power of the electric power receiving facility. To this end, a controller 53 computes an own demanded power Pd1 for driving the plurality of hydraulic actuators 13A, 19 on the basis of operation signals of the operation devices 35, 37, computes an allowable power as a power limit value usable by the electric motor 31 on the basis of the own demanded power, the demanded powers of the other electrically driven construction machines received through the communication device 46, and an allowable electric power of the electric power receiving facility 80 of the commercial electric power supply, and controls the electric motor 31 such that a power consumption of the electric motor 31 does not exceed the allowable power.

83. 发明公开

EP3798368A1 HYDRAULIC SHOVEL 有权
公开(公告)号：EP3798368A1
公开(公告)日：2021-03-31
申请号：EP19920780.4
申请日：2019-03-26
申请人： Hitachi Construction Machinery Co., Ltd. , Hitachi Construction Machinery Tierra Co., Ltd.
发明人： NAKATANI Kenichiro , IMURA Shinya
IPC分类号： E02F3/43
摘要： In a hydraulic excavator including a track structure, a swing structure swingably disposed on an upper portion of the track structure, a work implement coupled to the swing structure, an earth removal device including a blade coupled to the track structure and a lift cylinder configured to raise and lower the blade, an operation sensor configured to detect an operation of a travelling lever, a height sensor configured to measure a height of the blade with respect to the track structure, an antenna for a satellite positioning system, the antenna being mounted on the swing structure, and a controller configured to calculate positional data regarding the blade, the controller is configured to determine a travelling operation on the basis of a signal of the operation sensor, calculate a travelling direction of straight forward travelling of the track structure as an orientation of the track structure when the straight forward travelling of the track structure is detected from a trajectory of the antenna with a state in which no turn travelling operation is being performed as a precondition, calculate horizontal coordinates of the blade on the basis of the orientation of the track structure, and calculate the height of the blade on the basis of a position of the antenna and a measured value of the height sensor.

84. 发明公开

EP3779056A1 HYDRAULIC SHOVEL 有权
公开(公告)号：EP3779056A1
公开(公告)日：2021-02-17
申请号：EP18911937.3
申请日：2018-12-12
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： MAEHARA, Taihei , TAKAHASHI, kIWAMU , ISHII, Takeshi
IPC分类号： E02F9/00
摘要： An upper revolving structure (4) of a hydraulic excavator (1) includes a revolving frame (7), a counterweight (8), an operator's seat (12), a right front cover (17B) disposed from the right side of the operator's seat (12) toward a front end side of the revolving frame (7), a control valve device (18), and an accumulator (21).
An accumulator support device (23) is provided between the operator's seat (12) and the right front cover (17B), the accumulator support device (23) is configured by a box (24) providing the inside thereof for an accommodating space (25) and having an opening (26) and a lid member (28) mounted on the box (24) through a hinge member (29) and opened and closed between an open position at which the side of a free end (28D) opens the opening (26) and a closed position at which the side of the free end (28D) closes the opening (26), and the accumulator (21) is mounted on the lid member (28).

85. 发明授权

EP3235959B1 CONSTRUCTION MACHINERY 有权
公开(公告)号：EP3235959B1
公开(公告)日：2020-02-12
申请号：EP15869670.8
申请日：2015-10-30
申请人： HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.
发明人： NOMURA Takuya , TAKISHITA Tatsuo , YUNOUE Masayuki , NAKAMURA Yuta , SAKISAKA Keisuke
IPC分类号： E02F9/24 , B60R25/24

86. 发明公开

EP3581717A1 HYDRAULIC DRIVE DEVICE OF CONSTRUCTION MACHINE 有权
公开(公告)号：EP3581717A1
公开(公告)日：2019-12-18
申请号：EP18862787.1
申请日：2018-05-23
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKAHASHI, Kiwamu , MAEHARA, Taihei , ISHII, Takeshi , TAKEBAYASHI, Yoshifumi , NAKAMURA, Natsuki , OKA, Daisuke
IPC分类号： E02F9/22 , F15B11/02 , F15B11/17
摘要： When a swing motor and a boom cylinder are driven simultaneously, a hydraulic drive system appropriately adjusts a distribution of torques between hydraulic pumps and feeds back a torque actually consumed by the hydraulic pump for actuating the swing motor accurately to the hydraulic pump for actuating the boom cylinder. To that end, when boom raising and swinging are performed simultaneously, the hydraulic drive system corrects an allowable torque of a hydraulic pump 302 that supplies a hydraulic fluid to a swing motor 3c so as to be lowered by a certain ratio, reducing allowable torques of hydraulic pumps 102 and 202 that supply a hydraulic fluid to a boom cylinder 3a by torques consumed by the hydraulic pumps 102 and 202 that supply a hydraulic fluid to the swing motor 3c.

87. 发明授权

EP3112695B1 HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINERY 有权转让
公开(公告)号：EP3112695B1
公开(公告)日：2019-10-16
申请号：EP14882008.7
申请日：2014-11-26
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKAHASHI, Kiwamu , TSURUGA, Yasutaka , MORI, Kazushige , TAKEBAYASHI, Yoshifumi , NAKAMURA, Natsuki , OKAZAKI, Yasuharu , YAMADA, Kenji
IPC分类号： E02F9/22 , F15B11/02 , F15B11/00 , F15B11/17

88. 发明公开

EP3530816A1 HYDRAULIC SHOVEL 有权
公开(公告)号：EP3530816A1
公开(公告)日：2019-08-28
申请号：EP18761799.8
申请日：2018-02-28
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TANAKA Yutaka , MOTOZU Makoto , MAEDA Kohei , URASE Kohei
IPC分类号： E02F9/00
摘要： A revolving frame (6) is configured by including a bottom plate (6A) mounted to a revolving device (3), a left vertical plate (6B) and a right vertical plate (6C) that are provided to rise up extending in a front-rear direction and be spaced in a left-right direction on the bottom plate (6A), and a front plate (6K) that is positioned in the front side of the left vertical plate (6B) and the right vertical plate (6C) to block a space between the left vertical plate (6B) and the right vertical plate (6C). In addition, a hose guide (21) is provided on a rear surface side of the front plate (6K) in the revolving frame (6) to form a movement space (26), in which a plurality of hydraulic hoses (19) move when a front device (5) becomes in a revolving posture, between the rear surface side of the front plate (6K) and a revolving motor (16).

89. 发明公开

EP3495567A1 CONSTRUCTION MACHINE 有权
公开(公告)号：EP3495567A1
公开(公告)日：2019-06-12
申请号：EP17922910.9
申请日：2017-09-29
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： UMIZAKI, Yuuki , MOTOZU, Makoto
IPC分类号： E02F9/18 , E02F9/00
摘要： A cover mounting bracket (16) is provided on an upper side of a left weight part (11) and a right weight part (12) constituting a counterweight (10). The cover mounting bracket (16) is formed as a U-shaped frame with the counterweight (10) side open by a left extending member (17) extending forward from the upper side of the left weight part (11), a right extending member (18) extending forward from the upper side of the right weight part (12), and a connecting member (19) connecting the front side of the left extending member (17) and the front side of the right extending member (18) . A prime mover cover (28) is supported on the connecting member (19) of the cover mounting bracket (16) rotatably in a vertical direction through a hinge (31). The prime mover cover (28) is moved between an open position where an inspection opening (15) of the counterweight (10) is opened and a closed position where the inspection opening (15) is closed around the hinge (31).

90. 发明公开

EP3489528A1 HYDRAULIC DRIVE DEVICE FOR WORK MACHINES 有权
公开(公告)号：EP3489528A1
公开(公告)日：2019-05-29
申请号：EP17882133.6
申请日：2017-12-14
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKAHASHI, Kiwamu , MAEHARA, Taihei , MORI, Kazushige , TAKEBAYASHI, Yoshifumi , NAKAMURA, Natsuki
IPC分类号： F15B11/00 , E02F9/22 , F15B11/02
摘要： In a hydraulic drive system of a work machine which drives a plurality of actuators using three or more pumps, for an operation not including traveling, a highly efficient combined operation in a front implement and excellent combined operability of a swing and the front implement are enabled, while for an operation including traveling, a highly efficient traveling operation and a highly efficient combined operation of traveling and the front implement are enabled, and a sufficient operation speed of the front implement is achieved. To this end, each of the flow rates of the first, second, and third pumps (101, 201, 301) can be controlled independently by performing the load sensing control, and in a combined operation for driving a boom (511) and an arm (512), ether one of them is driven by the first pump while the other one is driven by the second pump, and the swing is driven by the third pump. In the traveling operation, the maximum capacity of the first and second pumps is switched to the maximum capacity for the traveling operation and driven by an open center circuit. In a combined operation of traveling and the front implement, the front implement is driven by performing the load sensing control using the third pump.

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