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1. 发明授权

EP3106420B1 MOBILE LIFT CRANE WITH VARIABLE POSITION COUNTERWEIGHT 有权
公开(公告)号：EP3106420B1
公开(公告)日：2018-06-06
申请号：EP16173277.1
申请日：2008-04-01
申请人： Manitowoc Crane Companies, LLC
发明人： PORUBCANSKY, Kenneth , PECH, David
IPC分类号： B66C23/76 , F16H19/04
CPC分类号： B66C23/76 , F16H19/04
摘要： A mobile lift crane (10) includes a carbody (12); a rotating bed (20); a boom (22); a moveable counterweight unit; at least one linear actuation device (38) ; and at least one arm (36) pivotally connected at a first end to the rotating bed (20) and at a second end to the linear actuation device (38). The arm (36) and linear actuation device (38) are connected between the rotating bed (20) and the counterweight unit such that extension and retraction of the linear actuation device (38) changes the position of the counterweight unit compared to the rotating bed (20). In one method of operation, the counterweight is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members (14, 16) on the carbody (12). The linear actuation device can include at least one rack and pinion assembly (636) or hydraulic cylinder. In another embodiment, the crane comprises a counterweight movement structure including a rack and pinion assembly (636) having housing (720) and a rack (710), the rack (710) having a rectangular cross section with first and second sides (712, 714) opposite one another and third and fourth sides (712, 733) opposite one another, and having teeth on the first side and second sides (712, 714), and at least first and third pinion gears (716, 718) engaged with the teeth (722) on the first side of the rack and second and fourth pinion gears (732, 734) engaged with the teeth on the second side of the rack, and wherein each pinion gear is driven by a separate hydraulic motor, and wherein the motor driving the first pinion gear (731) is mounted on the housing (720) adjacent an opposite side of the rack (710) from the motor driving the third pinion gear (733), and wherein the motor driving the second pinion gear (732) is mounted on the housing (720) adjacent an opposite side of the rack from the motor (794) driving the fourth pinion gear (734). In another embodiment the crane includes a counterweight support structure attached to the counterweight unit. The counterweight support structure includes at least two ground engaging members that can provide support to the counterweight in the event of a sudden release of the load. The support structure comprises a telescoping structure connected to and between the ground engaging members such that the distance between the ground engaging members can be adjusted between a first and second position.

2. 发明公开

EP3106420A1 MOBILE LIFT CRANE WITH VARIABLE POSITION COUNTERWEIGHT 有权
标题翻译： MOBILER HEBEKRAN MIT GEGENGEWICHT MIT VERNDNDERLICHER位置
公开(公告)号：EP3106420A1
公开(公告)日：2016-12-21
申请号：EP16173277.1
申请日：2008-04-01
申请人： Manitowoc Crane Companies, LLC
发明人： PORUBCANSKY, Kenneth , PECH, David
IPC分类号： B66C23/76 , F16H19/04
CPC分类号： B66C23/76 , F16H19/04
摘要： A mobile lift crane (610) includes a carbody (612) having moveable ground engaging members (614, 616); a rotating bed (620) rotatably connected to the carbody (612) such that the rotating bed (620) can swing with respect to the ground engaging members (614, 616); a boom (622) pivotally mounted on a front portion of the rotating bed (620); a mast (628) mounted at its first end on the rotating bed (620); a moveable counterweight unit (634); and at least one arm (636) pivotally connected at a first end to the rotating bed (620) and at a second end to a rack and pinion assembly (636). Extension and retraction of the rack and pinion assembly (636) changes the position of the counterweight unit (634) compared to the rotating bed (620).
摘要翻译：移动式起重机（610）包括具有可移动地面接合构件（614,616）的车体（612）; 旋转床（620），其可旋转地连接到所述车体（612），使得所述旋转床（620）能够相对于所述地面接合构件（614,616）摆动; 枢转地安装在所述旋转床（620）的前部的悬臂（622）; 安装在其旋转床（620）上的第一端的桅杆（628）; 可移动配重单元（634）; 以及至少一个臂（636）在第一端处枢转地连接到所述旋转床（620），并且在第二端处枢转地连接到齿条和小齿轮组件（636）。齿条和小齿轮组件（636）的延伸和缩回相对于旋转床（620）改变配重单元（634）的位置。

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