专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明公开

EP3660223A1 CONSTRUCTION MACHINERY 有权
公开(公告)号：EP3660223A1
公开(公告)日：2020-06-03
申请号：EP19750966.4
申请日：2019-01-31
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKEBAYASHI Yoshifumi , YOSHIDA Hajime , NAKAMURA Natsuki , OKA Daisuke
IPC分类号： E02F3/85
摘要： Provided is a construction machine that can prevent a machine body from being lowered without placing a blade in a floating state when the machine body is jacked up, even if the operator performs an erroneous operation, and that can perform favorable leveling work by placing the blade in the floating state when the machine body is not jacked up. A hydraulic excavator includes a pressure sensor that detects the pressure in a bottom-side oil chamber of a blade cylinder, and a controller that switches between validation and invalidation of a floating command and a lowering command for a blade operation device. In the case where the pressure detected by the pressure sensor is less than a predetermined value, the controller switches a solenoid selector valve to an interruption position to invalidate the floating command when a forward stroke of the operation lever is equal to or more than a reference value. In the case where the pressure detected by the pressure sensor is equal to or more than the predetermined value, the controller holds the solenoid selector valve in a communication position to validate the floating command when the forward stroke of the operation lever is equal to or more than the reference value.

62. 发明公开

EP3604685A1 HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE 有权
公开(公告)号：EP3604685A1
公开(公告)日：2020-02-05
申请号：EP17898332.6
申请日：2017-03-24
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： MORI, Kazushige , YOSHIDA, Hajime , TAKEBAYASHI, Yoshifumi , NAKAMURA, Natsuki , OKA, Daisuke
IPC分类号： E02F3/85
摘要： A hydraulic drive system for a hydraulic excavator that enables leveling work and a jack-up operation by a blade in a float state, that can prevent a body from falling even when an operator has falsely operated the hydraulic excavator during the jack-up operation by the blade, and that yet can perform favorable leveling work with the blade turned into the float state is provided. A float switch 37, a float valve 38, and a controller 34 are provided, the float valve 38 is changed over to a float position VI upon operating the float switch 37 when the blade is not in a jack-up state, the float valve 38 is changed over from the float position VI to a normal position V when the float valve 38 is in a state of being at the float position VI and an operation lever device 22 has been operated, and the float valve 38 is kept at the normal position V when the float valve 38 is at the normal position V and the float switch 37 has been operated in the jack-up state.

63. 发明授权

EP3231968B1 CONSTRUCTION MACHINE WITH AUTHENTICATION DEVICE 有权
公开(公告)号：EP3231968B1
公开(公告)日：2019-10-16
申请号：EP15867373.1
申请日：2015-10-29
申请人： HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.
发明人： NAKAMURA Yuta , TAKISHITA Tatsuo , YUNOUE Masayuki , NOMURA Takuya , SAKISAKA Keisuke
IPC分类号： E05B49/00 , E02F9/00 , F02N11/08 , E02F3/32 , E02F9/20 , E02F9/24 , B60R25/24 , F02D29/04 , F02D29/06 , H04L9/32

64. 发明公开

EP3495569A1 HYDRAULIC DRIVE DEVICE OF WORK MACHINE 有权
公开(公告)号：EP3495569A1
公开(公告)日：2019-06-12
申请号：EP17922917.4
申请日：2017-09-29
申请人： HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.
发明人： TAKAHASHI Kiwamu , MAEHARA Taihei , ISHII Takeshi
IPC分类号： E02F9/22
摘要： A hydraulic drive system for a work machine including a hydraulic energy recovery device 80 that is configured to perform load sensing control and accumulates hydraulic fluid that returns from a hydraulic cylinder 3a in operation of lowering a front work implement 104 into an accumulator 40 includes, in order to prevent, when operation other than operation of lowering the front work implement 104 is to be performed, hydraulic energy accumulated in the accumulator 40 from being consumed uselessly, a regeneration selector valve 23 in a hydraulic line for regenerating the hydraulic fluid accumulated in the accumulator 40 into a hydraulic fluid supply line 5 of a main pump 2. The regeneration selector valve 23 is controlled such that, only when saturation occurs with the main pump 2, flow from the accumulator 40 to the hydraulic fluid supply line 5 is permitted.

65. 发明公开

EP3489424A1 HYDRAULIC DRIVE DEVICE FOR ELECTRIC HYDRAULIC WORK MACHINE 有权
公开(公告)号：EP3489424A1
公开(公告)日：2019-05-29
申请号：EP18767847.9
申请日：2018-03-13
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKAHASHI, Kiwamu , TAKISHITA, Tatsuo , YUNOUE, Masayuki , NAKATANI, Kenichirou , MAEHARA, Taihei
IPC分类号： E02F9/20 , E02F9/22 , F15B11/00
摘要： A hydraulic drive system for an electrically-driven hydraulic work machine makes it possible to make a rated voltage of various electric equipment such as power storage devices common to one of an electrically-driven hydraulic work machine that is capable of being operated with lower horsepower and to prevent that only a power storage situation of one of the plurality of power storage devices significantly degrades together with operation of the electrically-driven hydraulic work machine and besides, to extend a time period within which each of actuators of the electrically-driven hydraulic work machine can obtain a predetermined speed. Accordingly, a controller 50 includes a virtual limitation torque calculation section 51 and electric motor rotational speed control sections 52 and 53. Variable horsepower control tables 52r and 53r are provided in the electric motor rotational speed control sections 52 and 53, and limit values q1*limit and q2*limit for a virtual displacement of the variable horsepower control tables 52r and 53r are changed such that a charge state of a power storage device 170 and a charge state of another power storage device 270 become equal to each other.

66. 发明授权

EP2581501B1 CONSTRUCTION MACHINE 有权转让
公开(公告)号：EP2581501B1
公开(公告)日：2019-03-13
申请号：EP11792267.4
申请日：2011-05-20
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TAKISHITA Tatsuo , NASU Katsuyoshi , KURIKUMA Hajime
IPC分类号： E02F9/00 , E02F9/20 , B60K11/06 , E02F9/22

67. 发明公开

EP3406804A1 COMPACT CONSTRUCTION MACHINERY 有权
公开(公告)号：EP3406804A1
公开(公告)日：2018-11-28
申请号：EP16886395.9
申请日：2016-09-07
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： IWAMOTO Yohei , KAWAMOTO Junya , TABETA Hiroshi
IPC分类号： E02F9/00 , B62D25/10 , B62D25/12
CPC分类号： B62D25/10 , B62D25/12 , E02F9/00
摘要： An engine cover (23) is provided between a counterweight (7) and a rear surface part (15B) of a cab (15) to be capable of opening/closing in an upper-lower direction and a heat exchanger cover (28) is provided between the rear side of a left side surface part (15C) and a right side surface part (15D) of the cab (15) and a revolving frame (6). The heat exchanger cover (28) is formed of a horizontal-opening structure of being rotatable in a front-rear direction to the revolving frame (6) with a front end (28C) in the front-rear direction as a fulcrum and a rear end (28D) in the front-rear direction as a free end. A heat exchanger cover lock mechanism (32) is provided on the rear end side of the heat exchanger cover (28) to hold the heat exchanger cover (28) in a closed state, and in a state where both the heat exchanger cover (28) and the engine cover (23) are closed, the engine cover (23) covers the rear end (28D) of the heat exchanger cover (28) and the heat exchanger cover lock mechanism (32) from backward.

68. 发明授权

EP2584100B1 ELECTRIC CONSTRUCTION MACHINE 有权转让
公开(公告)号：EP2584100B1
公开(公告)日：2018-10-31
申请号：EP11795526.0
申请日：2011-05-24
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： NOGUCHI Akira , YUNOUE Masayuki
IPC分类号： E02F9/00 , B60K1/04 , B60K11/06 , E02F9/08 , E02F9/20 , B60K1/00
CPC分类号： E02F9/0866 , B60K1/04 , B60K11/06 , B60K2001/005 , B60Y2200/412 , E02F9/0858 , E02F9/207
摘要： The object of the present invention is to provide an electric construction machine capable of efficiently cooling the battery mounted on the swing structure. To achieve the object, there is provided an electric construction machine in which a battery storage room 11 is formed in the swing structure 3 and a plurality of batteries 231 as electric power sources are arranged in the battery storage room 11, comprising: a battery storage structure 23 storing the batteries 231 and having an air flow channel through which air can flow upward from a lower part of the battery storage structure 23; a covering sheet 26 entirely covering the top and side faces of the battery storage structure 23; and a duct 27 for discharging the air, one end of which is arranged in an upper part of the covering sheet 26.

69. 发明公开

EP3351909A1 COMPACT CONSTRUCTION MACHINE 有权
公开(公告)号：EP3351909A1
公开(公告)日：2018-07-25
申请号：EP16846003.8
申请日：2016-03-07
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： TABETA Hiroshi , KAWAMOTO Junya
IPC分类号： G01F23/02 , B60K15/063 , E02F9/00 , E02F9/16
CPC分类号： E02F9/26 , B60K15/063 , E02F3/325 , E02F9/00 , E02F9/0883 , E02F9/16 , G01F23/02
摘要： An upper revolving structure (4) includes a revolving frame (6), an engine (7), a fuel tank (11), an operator's seat platform (16) provided by covering an upper side of the fuel tank (11), an operator's seat (18) mounted on the operator's seat platform (16), and a cab (22) covering a periphery of the operator's seat (18). The fuel tank (11) is disposed between the revolving frame (6) and the operator's seat platform (16), brought closer to a left surface part (25) side of the cab (22). A level gauge (29) is provided on an outer surface of the fuel tank (11). A fuel filling opening (27) surrounding a fuel filling port (11J) of the fuel tank (11) and a level gauge opening (28) are provided on the left surface part (25) of the cab (22).

70. 发明公开

EP3351691A1 GRIP HEATING DEVICE FOR CONSTRUCTION MACHINERY 有权
公开(公告)号：EP3351691A1
公开(公告)日：2018-07-25
申请号：EP16845998.0
申请日：2016-02-23
申请人： Hitachi Construction Machinery Tierra Co., Ltd.
发明人： NOMURA, Takuya , TAKISHITA, Tatsuo , YUNOUE, Masayuki , OMIYA, Takeyuki , TAKAGI, Wataru
IPC分类号： E02F9/20 , G05G1/06
CPC分类号： E02F9/2004 , E02F3/325 , E02F3/964 , E02F9/26 , G05G1/06 , G05G25/00
摘要： Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold.
The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.

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