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公开(公告)号：US20180044143A1
公开(公告)日：2018-02-15
申请号：US15549981
申请日：2015-09-29
申请人： TADANO LTD.
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.
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公开(公告)号：US11891279B2
公开(公告)日：2024-02-06
申请号：US17600222
申请日：2019-03-14
申请人： TADANO LTD.
CPC分类号： B66C23/705
摘要： This expansion device is an expansion device that expands and contracts an boom, 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 and is operated by the first working fluid; 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 operated by 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 operated by the second working fluid and switches between a connected state and a disconnected state of the first boom element and the second boom element.
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公开(公告)号：US10836612B1
公开(公告)日：2020-11-17
申请号：US16954125
申请日：2018-12-18
申请人： TADANO LTD.
发明人： Naotaka Masuda , Kenji Urushihara , Takashi Kawano
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, and winds in or reels out a wire rope; a selection unit for an operator to select either the high speed mode or the low speed mode; a load calculation unit calculating a suspended load; a tension calculation unit calculating the tension of the wire rope; and a control unit 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.
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公开(公告)号：US11472680B2
公开(公告)日：2022-10-18
申请号：US17056899
申请日：2019-05-27
申请人： TADANO LTD.
发明人： Naoto Kawabuchi , Hisanori Wada , Naotaka Masuda
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.
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公开(公告)号：US10995778B2
公开(公告)日：2021-05-04
申请号：US16089718
申请日：2017-03-31
申请人： TADANO LTD.
摘要： This hydraulic system is provided with: a hydraulic pump; a pilot-type control valve; an electromagnetic proportional valve; a controller; and a pilot pressure switching unit which is capable of switching the electromagnetic proportional valve supply pressure 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.
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公开(公告)号：US10604385B2
公开(公告)日：2020-03-31
申请号：US16088542
申请日：2017-04-07
申请人： TADANO LTD.
发明人： Naotaka Masuda
IPC分类号： B66C13/20 , B66C13/56 , B66C23/86 , F15B11/042 , F15B11/044 , B66C23/00
摘要： The present invention is configured so that it is possible to select any one of a first mode in which a first adjustment valve 13 and a second adjustment valve 20 operate solely on the basis of manipulation of a main manipulation tool (turning lever 8i), a second mode in which the first adjustment valve 13 operates solely on the basis of manipulation of the main manipulation tool (8i) and the second adjustment valve 20 operates solely on the basis of manipulation of a secondary manipulation tool (brake pedal 8j), and a third mode in which the first adjustment valve 13 operates solely on the basis of manipulation of the main manipulation tool (8i) and the second adjustment valve 20 operates on the basis of manipulation of the secondary manipulation tool (8j) while operating on the basis of manipulation of the main manipulation tool (8i).
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