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公开(公告)号：US06758356B1
公开(公告)日：2004-07-06
申请号：US08748986
申请日：1996-11-14
申请人： Arthur G. Zuehlke , David J. Pech
发明人： Arthur G. Zuehlke , David J. Pech
IPC分类号： B66D126
CPC分类号： B66C13/18
摘要： An improved method and system for a liftcrane in which a load is lifted through the combined action of first and second hoist drums. The method and system use a first rope wound on one hoist drum and a second rope wound on the second hoist drum. The ends of the ropes opposite the hoist drums are linked together to transmit tension between them. The load is coupled to the ropes. If the take up speed of one of the ropes exceeds the take up speed of the other, the linked ends of the ropes will shift. This condition is detected and the operation of at least one of the first and second hoist drums is modified to bring the take up rates into balance. This system is advantageously used with a hoist block sheave arrangement. This system can also be used with a single rope in which each of the ends of the single rope are wound on a separate one of the hoist drums and the load is coupled to the middle of the rope.
摘要翻译： 一种用于电梯的改进的方法和系统，其中负载通过第一和第二提升滚筒的组合作用提升。 该方法和系统使用缠绕在一个卷扬鼓上的第一绳索和缠绕在第二提升滚筒上的第二绳索。 与起重机鼓相对的绳索的端部连接在一起以在它们之间传递张力。 负载耦合到绳索。 如果其中一根绳索的卷取速度超过另一条绳索的卷取速度，则绳索的连接端将移动。 检测到这种情况，修改第一和第二提升滚筒中的至少一个的操作，以使卷取速率平衡。 该系统有利地用于起重滑轮滑轮装置。 该系统还可以与单个绳索一起使用，其中单个绳索的每个端部缠绕在提升卷筒的单独的一个上，并且负载联接到绳索的中间。
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公开(公告)号：US5579931A
公开(公告)日：1996-12-03
申请号：US210988
申请日：1994-03-18
申请人： Arthur G. Zuehlke , David J. Pech
发明人： Arthur G. Zuehlke , David J. Pech
CPC分类号： B66C13/18
摘要： An improved method and system for a liftcrane in which a load is lifted through the combined action of first and second hoist drums. The method and system use a first rope wound on one hoist drum and a second rope wound on the second hoist drum. The ends of the ropes opposite the hoist drums are linked together to transmit tension between them. The load is coupled to the ropes. If the take up speed of one of the ropes exceeds the take up speed of the other, the linked ends of the ropes will shift. This condition is detected and the operation of at least one of the first and second hoist drums is modified to bring the take up rates into balance. This system is advantageously used with a hoist block sheave arrangement. This system can also be used with a single rope in which each of the ends of the single rope are wound on a separate one of the hoist drums and the load is coupled to the middle of the rope.
摘要翻译： 一种用于电梯的改进的方法和系统，其中负载通过第一和第二提升滚筒的组合作用提升。 该方法和系统使用缠绕在一个卷扬鼓上的第一绳索和缠绕在第二提升滚筒上的第二绳索。 与起重机鼓相对的绳索的端部连接在一起以在它们之间传递张力。 负载耦合到绳索。 如果其中一根绳索的卷取速度超过另一条绳索的卷取速度，则绳索的连接端将移动。 检测到这种情况，修改第一和第二提升滚筒中的至少一个的操作，以使卷取速率平衡。 该系统有利地用于起重滑轮滑轮装置。 该系统还可以与单个绳索一起使用，其中单个绳索的每个端部缠绕在提升卷筒的单独的一个上，并且负载联接到绳索的中间。
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公开(公告)号：US06481202B1
公开(公告)日：2002-11-19
申请号：US09175065
申请日：1998-10-19
IPC分类号： F16D3102
CPC分类号： B66C23/82 , B66C23/36 , B66C23/62 , B66C23/74 , F15B2211/20561
摘要： A crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works includes a hydraulic boom hoist cylinder and a hydraulic circuit for controlling the hydraulic boom hoist cylinder. The hydraulic cylinder is pivotally connected to a mast on the upper works and pendently connected to the boom. The boom hoist cylinder preferably comprises two double-acting hydraulic cylinders. The hydraulic circuit includes a closed loop pump and a hydraulic controller connecting the closed loop pump and the double-acting cylinders such that fluid from the pump can be directed either to extend or retract the cylinders, with the hydraulic fluid exiting the cylinders being directed to return to the pump.
摘要翻译： 具有可旋转地安装在下部工件上的上部工作台和枢转地安装在上部工件上的起重机的起重机包括液压动臂起重机气缸和用于控制液压动臂起重机气缸的液压回路。 液压缸可枢转地连接到上部工件上的桅杆上，并悬挂连接到起重臂。 起重臂起重机缸优选地包括两个双作用液压缸。 液压回路包括闭环泵和连接闭环泵和双作用气缸的液压控制器，使得来自泵的流体可以被引导以延伸或缩回气缸，而离开气缸的液压流体被引导到 返回泵。
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公开(公告)号：US09278834B2
公开(公告)日：2016-03-08
申请号：US12847902
申请日：2010-07-30
申请人： David J. Pech , Joseph R. Rucinski
发明人： David J. Pech , Joseph R. Rucinski
摘要： A lift crane includes a carbody; a rotating bed comprising a counterweight support frame; a boom; a counterweight unit supported on the counterweight support frame in a moveable relationship with respect to the counterweight support frame; and a counterweight unit movement device connected between the rotating bed and the counterweight unit to move the counterweight unit toward and away from the boom. The crane is configured such that during crane operation, the moment generated by the counterweight unit acts on the rotating bed predominantly through the counterweight support frame. Alternatively, the crane can include a mast. In some embodiments the same basic crane is configured to be set-up with two different counterweight options, i) a counterweight unit directly supported on the counterweight support frame and ii) a counterweight support beam moveably connected to the remainder of the rotating bed and a counterweight unit supported on the counterweight support beam.
摘要翻译： 起重机包括车身; 旋转床，包括配重支撑框架; 繁荣 配重单元，其以相对于配重支撑框架的可移动关系支撑在配重支撑框架上; 以及配重单元运动装置，其连接在所述旋转床和所述配重单元之间，以使所述配重单元朝向和远离所述起重臂移动。 起重机构造成使得在起重机操作期间，由配重单元产生的力矩主要通过配重支撑框架作用在旋转床上。 或者，起重机可以包括桅杆。 在一些实施例中，相同的基本起重机被配置为具有两个不同的配重选项，i）直接支撑在配重支撑框架上的配重单元，以及ii）可移动地连接到旋转床的其余部分的配重支撑梁， 配重单元支撑在配重支撑梁上。
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公开(公告)号：US20130153525A1
公开(公告)日：2013-06-20
申请号：US13752053
申请日：2013-01-28
IPC分类号： B66C23/76
CPC分类号： B66C23/76
摘要： A mobile lift crane includes a carbody; a rotating bed; a boom; and a moveable counterweight unit. The crane is configured such that the counterweight unit is never supported by the ground other than indirectly by moveable ground engaging members on the carbody throughout a pick, move and set operation. In a first aspect, the crane is operable to move the counterweight unit to at least a first position in front of a fixed rearmost portion of the rotating bed and a second position behind the fixed rearmost portion of the rotating bed. In a second aspect, the crane also includes a first linear actuation device operable to move the counterweight unit toward and away from the front portion of the rotating bed by extending and retracting the linear actuation device. The counterweight unit may be moved a greater distance than a stroke of the first linear actuation device.
摘要翻译： 移动式起重机包括车身; 旋转床 繁荣 和可移动的配重单元。 起重机被构造成使得配重单元从来不被地面支撑，而不是通过在车身上的可移动的地面接合构件间接地进行拾取，移动和设置操作。 在第一方面，起重机可操作以将配重单元移动到旋转床的固定最后部分的前面的至少第一位置和旋转床的固定最后部分后面的第二位置。 在第二方面，起重机还包括第一线性致动装置，其可操作以通过延伸和缩回线性致动装置来使配重单元朝向和远离旋转床的前部移动。 配重单元可以移动比第一线性致动装置的行程更大的距离。
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公开(公告)号：US5406767A
公开(公告)日：1995-04-18
申请号：US980499
申请日：1992-11-23
CPC分类号： B66C23/70 , Y10T403/29 , Y10T403/7094
摘要： A longitudinally divisible crane boom segment includes a plurality of sections that are easily transportable. The sections each include at least one chord member, and a plurality of partial lacing elements. Each partial lacing element has a first end permanently attached to the at least one chord member and a second end connectable to one or more corresponding ends of plurality of partial lacing elements attached to a chord member of another section. Preferably the partial lacing elements are connected by dovetail connectors.
摘要翻译： 一个可纵向分割的起重臂段包括易于运输的多个部分。 这些部分各自包括至少一个弦构件和多个部分系带元件。 每个部分系带元件具有永久地附接到至少一个弦构件的第一端和可连接到附接到另一段的弦构件的多个部分系带元件的一个或多个相应端部的第二端。 优选地，部分系带元件通过燕尾连接器连接。
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公开(公告)号：US5199586A
公开(公告)日：1993-04-06
申请号：US736029
申请日：1991-07-25
申请人： David J. Pech , Wayne W. Beebe , Terry Casavant , John Lanning , Paul M. Pukita , Michael J. Wanek
发明人： David J. Pech , Wayne W. Beebe , Terry Casavant , John Lanning , Paul M. Pukita , Michael J. Wanek
CPC分类号： B66C23/70
摘要： A quick-connect system is disclosed for sectional boom members for cranes and the like. The sectional boom members comprise chords for carrying compressive loads, each chord terminating in an end configured to abut against an end of a chord of an adjacent sectional boom member. The quick-connect system comprises at least one easily alignable connector secured to the ends of at least one of the chords, the connector comprising a compressive load bearing surface intersected by the intersection of the vertical and horizontal neutral axes of the chord to which the connector is attached.
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公开(公告)号：US4136855A
公开(公告)日：1979-01-30
申请号：US747331
申请日：1976-12-03
CPC分类号： B66D1/44
摘要： A hoist drum drive control is provided with both variable displacement and fixed displacement motors geared to the drum and connected in parallel to a variable displacement pump. During high speed hoisting the variable displacement motor is shifted to zero displacement until the back pressure reaches a certain level at which time the displacement is automatically increased until a balanced condition is achieved. When lowering heavy loads a feedback to the variable pump decreases its displacement to prevent over speeding the engine.
摘要翻译： 提升卷筒驱动控制装置配备有可变容量和固定容积电动机，其适用于滚筒并与可变排量泵并联连接。 在高速提升期间，可变排量马达移动到零位移，直到背压达到一定水平，此时位移自动增加，直到达到平衡状态。 当降低重负荷时，反馈给变量泵减小其位移，以防止发动机过速。
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9.发明授权
公开(公告)号：US4050586A
公开(公告)日：1977-09-27
申请号：US625197
申请日：1975-10-23
摘要： A self-erecting mast and boom for a lift crane including self-storing mast cylinders for erecting the mast and rotating a pivoted boom carrier into position to receive the boom which may then be raised by the boom hoist mechanism of the crane. A back hitch assembly including hydraulic cylinders is employed to initially raise the mast and the gantry members which may be lowered into horizontal position to reduce the crane profile for self-propelled transport between job sites.
摘要翻译： 用于起重机的自立式桅杆和起重机，包括用于竖立桅杆的自储存桅杆缸，并将枢转的吊臂架移动到适当位置，以接收可能由起重机的起重臂起重机构升起的起重臂。 使用包括液压缸的后连接组件来初始地升高桅杆和机架构件，其可以降低到水平位置以减少起重机轮廓，用于在作业位置之间进行自推进的运输。
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公开(公告)号：US4005780A
公开(公告)日：1977-02-01
申请号：US630426
申请日：1975-11-10
CPC分类号： B66C23/92
摘要： The back hitch assembly for a lift or tower crane includes a tension sensing device which regulates the pressure delivered to the boom stop or hold back cylinders such that as the boom hoist line and back hitch become slack when the load line is relieved more pressure is delivered to the cylinders to counteract the rearward pull on the boom or tower due to the suspended weight of the masts and equalizer assemblies.
摘要翻译： 用于升降机或塔式起重机的后连接组件包括张力传感装置，其调节传递到悬臂停止件或保持缸的压力，使得当卸载负载线时，吊臂提升机线和后牵引变得松弛，输送更多的压力 由于桅杆和均衡器组件的悬挂重量而与气缸抵消在悬臂或塔上的向后拉动。
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