公开(公告)号：US09688519B2

公开(公告)日：2017-06-27

申请号：US15015647

申请日：2016-02-04

申请人： TADANO LTD.

发明人： Naoto Kawabuchi ,  Takashi Kawano

IPC分类号： B66C23/06 ,  B66C23/70 ,  B66C23/22

CPC分类号： B66C23/705 ,  B66C23/22

摘要： A telescopic boom extension device includes a driving mechanism. The driving mechanism that drives B pins and a C pin includes a hydraulic supply part and a drive source generation part. The drive source generation part generates a predetermined hydraulic pressure at the hydraulic supply part based on a pneumatic pressure. The hydraulic supply part has an accumulator and AOHs and supplies a hydraulic pressure to a cylinder-boom coupling mechanism and an inter-boom fixing mechanism. The drive source generation part uses a pneumatic supply part to send compressed air to the hydraulic supply part.

公开(公告)号：US09738498B2

公开(公告)日：2017-08-22

申请号：US15010078

申请日：2016-01-29

申请人： TADANO LTD.

发明人： Naoto Kawabuchi ,  Takashi Kawano

IPC分类号： E04H12/18 ,  E04H12/34 ,  B66C23/70

CPC分类号： B66C23/705

摘要： A telescopic boom extension device includes a cylinder-boom coupling mechanism, an inter-boom fixing mechanism, and a driving mechanism that drives the foregoing two. The driving mechanism has a hydraulic supply part and a drive source generation part. The hydraulic supply part includes an AOH and is provided at a cylinder tube of a telescopic boom. The hydraulic supply part supplies operating oil selectively to actuators driving a B pin and a C pin. The drive source generation part includes an air hose and supplies compressed air to the AOH. The air hose is wound around a hose reel in an unrollable manner.

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.

发明人： Naoto Kawabuchi ,  Hiroshi Kitayama ,  Naotaka Masuda ,  Hisanori Wada ,  Takashi Kawano

IPC分类号： B66C23/00 ,  B66C23/70

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.

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

IPC分类号： B66C13/20 ,  B66C23/00 ,  B66D1/50 ,  B66C23/88 ,  B66C23/36

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.

公开(公告)号：US10604386B2

公开(公告)日：2020-03-31

申请号：US16081647

申请日：2017-03-03

申请人： TADANO LTD.

发明人： Naoto Kawabuchi ,  Takashi Kawano

IPC分类号： B66C23/70 ,  B66C23/00 ,  F15B15/14 ,  F15B15/26 ,  F15B15/16 ,  F15B3/00

摘要： An expansion/contraction mechanism includes a telescopic cylinder, boom fixing means, cylinder-boom connecting means, and a hydraulic-pressure supply unit, and telescopes a plurality of booms except a base boom by telescoping the telescopic cylinder. The hydraulic-pressure supply unit includes a pneumatic-pressure source, a selector valve which selects a destination of air provided from the pneumatic-pressure source, a first pneumatic path through which first air sent from the selector valve circulates, a second pneumatic path through which second air sent from the selector valve circulates, a first pneumatic-to-hydraulic conversion unit which converts a pneumatic pressure provided by the first air to a hydraulic pressure and supplies the hydraulic pressure to a first hydraulic cylinder, and a second pneumatic-to-hydraulic conversion unit which converts a pneumatic pressure provided by the second air to a hydraulic pressure and supplies the hydraulic pressure to a second hydraulic cylinder.