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    • 24. 发明授权
    • Crane return
    • 起重机返回
    • US07597050B2
    • 2009-10-06
    • US10563775
    • 2005-08-01
    • Steven K. Waisanen
    • Steven K. Waisanen
    • B61D1/00B61B3/00B66C17/00
    • B66C9/14
    • A crane return system is used for returning a crane component to a home position when there is a loss of power. A crane includes a bridge with a plurality of main wheels adapted to travel along at least one rail. The crane return system includes a plurality of auxiliary drive wheels supported by the bridge, the auxiliary drive wheels movable between a first position, in which the auxiliary drive wheels are recessed from the rail, and a second position, in which the auxiliary drive wheels are in contact with the rail. When power is supplied to the crane return system the auxiliary drive wheels are in the first position. A hydraulic fluid pressure vessel stores hydraulic fluid, wherein a substantially fixed mass of hydraulic fluid is contained within the crane return system, and a hydraulic cylinder is interconnected with the auxiliary drive wheels and selectively fluidly communicates with the hydraulic fluid pressure vessel. When power is lost to the crane, hydraulic fluid is supplied to the hydraulic cylinder to extend the hydraulic cylinder and thereby move the auxiliary drive wheels from the first position to the second position. A drive motor is interconnected with the auxiliary drive wheels and selectively fluidly communicates with the hydraulic fluid pressure vessel. When the auxiliary drive wheels are in the second position, hydraulic fluid is diverted from the hydraulic cylinder and supplied to the drive motor to rotate the auxiliary drive wheels and move the bridge toward a home position.
    • 起重机返回系统用于在发生功率损失时将起重机部件返回原位。 起重机包括具有适于沿着至少一个轨道行进的多个主轮的桥。 起重机返回系统包括由桥支撑的多个辅助驱动轮,辅助驱动轮可在辅助驱动轮从轨道凹入的第一位置和辅助驱动轮之间移动的第二位置 与铁路接触。 当向起重机返回系统供电时,辅助驱动轮处于第一位置。 液压流体压力容器存储液压流体,其中基本上固定质量的液压流体包含在起重机返回系统内,并且液压缸与辅助驱动轮互连并选择性地与液压流体压力容器连通。 当起重机损失动力时,向液压缸供给液压油以延伸液压缸,从而将辅助驱动轮从第一位置移动到第二位置。 驱动马达与辅助驱动轮互连,并与液压流体压力容器选择性地流体连通。 当辅助驱动轮处于第二位置时,液压流体从液压缸转向并提供给驱动马达以使辅助驱动轮旋转并将桥移向原位。