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1. 发明公开

EP3805143A1 CRANE 审中-实审
公开(公告)号：EP3805143A1
公开(公告)日：2021-04-14
申请号：EP19812444.8
申请日：2019-05-27
申请人： TADANO LTD.
发明人： KAWABUCHI, Naoto , WADA, Hisanori , MASUDA, Naotaka
IPC分类号： B66C23/693 , B66C23/42
摘要： This crane is provided with: a telescopic boom that can be extended; an extension device for extending the telescopic boom; a hydraulic pressure source provided in the extension device; a cylinder connection mechanism connected to the hydraulic pressure source and switching between the states of connection and non-connection with the telescopic boom on the basis of the supply and discharge of hydraulic oil; a first oil path for connecting the hydraulic pressure source and the cylinder connection mechanism; a first valve that is provided on the first oil path and switches the supply and discharge state of the hydraulic oil with respect to the cylinder connection mechanism; and a second oil path that bypasses the first valve and connects the hydraulic pressure source and the cylinder connection mechanism.

2. 发明公开

EP3434913A1 HYDRAULIC SYSTEM 有权
公开(公告)号：EP3434913A1
公开(公告)日：2019-01-30
申请号：EP17770411.1
申请日：2017-03-24
申请人： Tadano Ltd.
发明人： KAWABUCHI, Naoto , YOSHIDA, Naofumi , MASUDA, Naotaka , FUKUMORI, Yasuhiro
IPC分类号： F15B20/00 , B66C15/00
摘要： Provided is a hydraulic system with which an operator can safely perform work during an emergency operation even in the event that an electromagnetic proportional valve itself has failed.
This hydraulic system is provided with a hydraulic pump, a control valve, and a pilot pressure supply unit. The pilot pressure supply unit has: an electromagnetic proportional valve that has a detent-type emergency manual operation function with which a pilot oil passage can be opened manually and generates pilot pressure for a control valve; a controller that controls the degree of opening of the electromagnetic proportional valve in accordance with the operation of an operation lever; and a pilot pressure switching unit that switches the oil pressure state of the pilot pressure supply unit between an on-loading state and an unloading state. The pilot pressure switching unit performs control to implement the unloading state when the electromagnetic proportional valve is being opened manually and performs control to implement the on-loading state after the electromagnetic proportional valve has been opened manually.

3. 发明公开

EP3939929A1 EXPANSION DEVICE AND CRANE 审中-实审
公开(公告)号：EP3939929A1
公开(公告)日：2022-01-19
申请号：EP19918549.7
申请日：2019-03-14
申请人： TADANO LTD.
发明人： KAWABUCHI, Naoto , KITAYAMA, Hiroshi , MASUDA, Naotaka , WADA, Hisanori , KAWANO, Takashi
IPC分类号： B66C23/693
摘要： This expansion device is an expansion device that expands and contracts an expandable boom having a first boom element and a second boom element which expandably overlap, the expansion device including: a first hydraulic source that discharges a first working fluid; an expandable cylinder that has a fixed part and a movable part movable with respect to the fixed part, is operated on the basis of supply of the first working fluid, and moves the first boom element with respect to the second boom element in a stretching direction; a second hydraulic source that is provided to the movable part, discharges the second working fluid, and is a separate hydraulic source from the first hydraulic source; a first connecting mechanism that is provided to the movable part, is operated based on supply of the second working fluid, and switches between a connected state and a disconnected state of the first boom element and the movable part; and a second connecting mechanism that is provided to the movable part, is operated based on supplying the second working fluid, and switches between a connected state and a disconnected state of the first boom element and the second boom element.

4. 发明授权

EP3258339B1 ACTUATOR CONTROL DEVICE AND WORK VEHICLE 有权
公开(公告)号：EP3258339B1
公开(公告)日：2019-08-21
申请号：EP15882017.5
申请日：2015-09-29
申请人： Tadano Ltd.
发明人： KAWABUCHI, Naoto , YOSHIDA, Naofumi , MASUDA, Naotaka , FUKUMORI, Yasuhiro
IPC分类号： G05G7/04 , B66C13/20 , F15B11/02 , E02F9/22 , F15B19/00 , F15B21/08

5. 发明公开

EP3730446A1 CRANE 有权
公开(公告)号：EP3730446A1
公开(公告)日：2020-10-28
申请号：EP18892757.8
申请日：2018-12-18
申请人： TADANO LTD.
发明人： MASUDA, Naotaka , URUSHIHARA, Kenji , KAWANO, Takashi
IPC分类号： B66C13/20 , B66C23/00 , B66D1/44
摘要： The present invention is provided with: a manipulation unit; a winch device that operates with an actuation mode of either a high speed mode or a low speed mode on the basis of manipulation of the manipulation unit, and winds in or reels out a wire rope to which a hook is fixed; a selection unit for an operator to select either the high speed mode or the low speed mode; a load calculation unit for calculating a suspended load; a tension calculation unit for calculating the tension of the wire rope; and a control unit for controlling the actuation of the winch device. If the mode selected by the selection unit is the high speed mode, the manipulation unit is manipulated from a neutral state to a non-neutral state, and the suspended load is smaller than a load threshold and the tension is smaller than a tension threshold, the control unit controls the winch device so as to operate in the high speed mode. Through this, a winch system of a mobile crane having excellent operability is provided.

6. 发明公开

EP3438467A1 HYDRAULIC SYSTEM AND EMERGENCY OPERATION METHOD 有权
公开(公告)号：EP3438467A1
公开(公告)日：2019-02-06
申请号：EP17775552.7
申请日：2017-03-31
申请人： Tadano Ltd.
发明人： KAWABUCHI, Naoto , YOSHIDA, Naofumi , MASUDA, Naotaka , FUKUMORI, Yasuhiro
IPC分类号： F15B11/00 , F15B11/08 , F15B20/00 , B66C13/22
摘要： Provided are: a hydraulic system and an emergency operation method which can slowly drive an actuator during an emergency operation and are excellent in safety. This hydraulic system is provided with: a hydraulic pump; a pilot-type control valve; an electromagnetic proportional valve which supplies a pilot pressure to the control valve; a controller which controls the electromagnetic proportional valve; and a pilot pressure switching unit which is capable of switching the electromagnetic proportional valve supply pressure supplied from a pilot pressure source to the electromagnetic proportional valve, to a first pressure during a normal operation, or to a second pressure lower than the first pressure. The control valve is provided with a bleed-off passage, and is capable of controlling the operating oil pressure supplied to the actuator, according to the opening area thereof. During an emergency operation, the electromagnetic proportional valve supply pressure is switched from the first pressure to the second pressure, the electromagnetic proportional valve is brought into a fully opened state, and the operating oil discharge amount from the hydraulic pump increases and decreases, and the operating oil pressure increases and decreases, and thus the operating speed of the actuator is controlled.

7. 发明公开

EP3258339A1 ACTUATOR CONTROL DEVICE AND WORK VEHICLE 有权
标题翻译：执行器控制装置和工作车辆
公开(公告)号：EP3258339A1
公开(公告)日：2017-12-20
申请号：EP15882017.5
申请日：2015-09-29
申请人： Tadano Ltd.
发明人： KAWABUCHI, Naoto , YOSHIDA, Naofumi , MASUDA, Naotaka , FUKUMORI, Yasuhiro
IPC分类号： G05G7/04 , B66C13/20 , F15B11/02
CPC分类号： B66C13/20 , B66C13/18 , B66C13/56 , B66C23/36 , B66C23/54 , E02F9/2012 , E02F9/2253 , F15B11/02 , F15B19/002 , F15B21/082 , F15B21/087 , F15B2211/30525 , F15B2211/3144 , F15B2211/327 , F15B2211/50554 , F15B2211/5151 , F15B2211/6346 , F15B2211/665 , F15B2211/6654 , F15B2211/6658 , F15B2211/75 , G05G7/04
摘要： [Problem] To provide an actuator control device with which desired drive control characteristics can be obtained by means of a simple operation.
[Solution] This device performs: a reception process (S12) in which designations of a minimum operation amount and maximum operation amount of an operation unit for driving an actuator, and a maximum driving speed which is the actuator driving speed corresponding to the maximum operation amount are received; a determination process (S13, 14) in which a function representing a characteristic line that links a first point, which corresponds to the minimum operation amount and the driving speed of 0, and a second point, which corresponds to the maximum operation amount and the maximum driving speed, is stored in a storage unit as a drive control characteristic; and a drive control process in which, in response to operation of the operation unit, the actuator is driven at a driving speed corresponding to the operation amount specified by the drive control characteristic stored in the storage unit.
摘要翻译：本发明的目的在于提供一种通过简单的操作就能够获得所期望的驱动控制特性的致动器控制装置。该装置执行：接收处理（S12），其中执行器驱动的操作单元的最小操作量和最大操作量的指定以及作为与最大操作相对应的致动器驱动速度的最大驱动速度金额收到; 确定处理（S13,14），其中表示连接对应于最小操作量和驱动速度0的第一点和对应于最大操作量和第二点的第二点的特征线的函数最大行驶速度作为行驶控制特性存储在存储单元中; 以及驱动控制处理，其中响应于操作单元的操作，致动器以对应于存储在存储单元中的驱动控制特性所指定的操作量的驱动速度被驱动。

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