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公开(公告)号：US20210039924A1
公开(公告)日：2021-02-11
申请号：US16968580
申请日：2019-02-14
申请人： TADANO LTD.
发明人： Masahide ZUSHI , Kazu NAGAHAMA
IPC分类号： B66C23/70
摘要： This crane is configured by being provided with: a telescopic boom having an inside boom element and an outside boom element that overlap each other in an extendable and contractible manner; an extension/contraction actuator that displaces one boom element among the inside boom element and the outside boom element in the extending and contracting directions; at least one electric drive source provided in the extension/contraction actuator; a first coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the extension/contraction actuator and one of the boom elements; and a second coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the inside boom element and the outside boom element.
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公开(公告)号：US20220169484A1
公开(公告)日：2022-06-02
申请号：US17600287
申请日：2020-04-03
申请人： TADANO LTD.
IPC分类号： B66C23/70
摘要： This work machine includes: an actuator that extends and retracts a telescopic boom; an electric drive source that is provided in the actuator and drives using power supplied from a power source; an operating unit that operates based on power of the electric drive source; an electric circuit capable of switching between a drive state in which a supply of power from the power source to the electric drive source is allowed to drive the electric drive source, and a braking state in which the supply of power from the power source to the electric drive source stops to generate a braking force to be applied to the electric drive source; and a control unit that controls the switching between the drive state and the braking state.
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公开(公告)号：US20210039926A1
公开(公告)日：2021-02-11
申请号：US16968582
申请日：2019-02-14
申请人： TADANO LTD.
发明人： Masahide ZUSHI , Kazu NAGAHAMA
摘要： There is provided a crane including: a telescopic boom having an inner boom element and an outer boom element; a telescoping actuator that displaces the inner boom element or the outer boom element in the telescoping direction; a first coupling member that releasably couples the telescoping actuator to one of the boom elements; a second coupling member that releasably couples the pair of boom elements to each other; an electric drive source provided at the telescoping actuator; a first coupling mechanism that displaces the first coupling member or the second coupling member on the basis of motive power of the electric drive source, thereby switching a coupled state and a non-coupled state of the members that are releasably coupled by one of the coupling members; and a position information detection device that detects information relating to the position of one of the coupling members on the basis of output from the electric drive source.
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公开(公告)号：US20220267120A1
公开(公告)日：2022-08-25
申请号：US17631710
申请日：2020-08-21
申请人： TADANO LTD.
发明人： Manato SHIRAI , Kazu NAGAHAMA , Masahide ZUSHI
IPC分类号： B66C23/70
摘要： The work machine includes: a telescoping actuator that moves a first boom in the telescoping direction with respect to a second boom; an electrical drive source that is disposed in a movable portion of the telescoping actuator; a first connection mechanism that switches a connection state between the telescoping actuator and the first boom on the basis of the power of the electrical drive source; a second connection mechanism that switches a connection state between the first boom and the second boom on the basis of the power of the electrical drive source; and a torque limiter that is disposed between the electrical drive source and the first connection mechanism or the second connection mechanism, the torque limiter maintaining, at a predetermined value or less, a load acting on a mechanical element constituting a power transmission path from the electrical drive source.
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公开(公告)号：US20220212904A1
公开(公告)日：2022-07-07
申请号：US17613299
申请日：2020-08-21
申请人： TADANO LTD.
发明人： Manato SHIRAI , Kazu NAGAHAMA , Masahide ZUSHI
IPC分类号： B66C23/70
摘要： This work machine comprises: a telescoping actuator that moves a first boom with respect to a second boom; an electrical drive source that is disposed in a movable portion of the telescoping actuator; a first biasing mechanism that maintains the connection state between the telescoping actuator and the first boom; a first connection mechanism that switches the connection state between the telescoping actuator and the first boom on the basis of the power of the electrical drive source; a second biasing mechanism that maintains the connection state between the first boom and the second boom; a second connection mechanism that switches the connection state between the first boom and the second boom on the basis of the power of the electrical drive source; and a clutch that discretionally intermittently transmits the power of the electrical drive source to the first connection mechanism and the second connection mechanism.
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公开(公告)号：US20220169485A1
公开(公告)日：2022-06-02
申请号：US17600324
申请日：2020-04-03
申请人： TADANO LTD.
IPC分类号： B66C23/70
摘要： A work machine includes: an actuator that extends and retracts a telescopic boom; an electric drive source that is provided in the actuator and drives using power supplied from a power source; an operating unit that operates based on power of the electric drive source; and a joint that has a drive-side element fixed to a first transmission shaft that rotates on the basis of the power of the electric drive source and a driven-side element fixed to a second transmission shaft connected to the operating unit, the joint being able to take a transmission state in which both the drive-side element and the driven-side element rotate and a non-transmission state in which only either the drive-side element or the driven-side element rotates.
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