The invention belongs to the technical field of mechanical equipment, and relates to a pre-tightening method for a super-lift inhaul cable of an all-terrain crane. The pre-tightening method comprisesthe following steps that S1, a proper working condition is selected, the arm length L of the all-terrain crane is determined according to the lifting height, amplitude and the like, and the length H of the released super-lift inhaul cable is determined according to the arm length L; S2, a main arm extends to a rope releasing position, a winch releases the super-lift inhaul cable with the length ofH, and a locking device is locked; and S3, a main arm telescopic oil cylinder pushes a second-section arm to extend, so that the length of the arm reaches L, and pre-tightening is achieved. Accordingto the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the pre-tightening principle is characterized in that the main arm telescopic oil cylinder pushes the main arm to extend, and the hinge point at the upper end of the super-lift inhaul cable extends outwards along with extension of the main arm, so that the distance between the two hinge points of the inhaul cable is increased, and tensioning of the inhaul cable is achieved; and according to the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the structure is simplified, the preparation time is saved, the operation steps are reduced, and a tensioning oil cylinder in a super-lift supporting rod can be effectively replaced, so that a hydraulic system is simplified, the manufacturing cost is saved, the main arm telescopic oil cylinder is fully utilized to provide large pre-tightening force, and the lifting performance of the crane is maximized.
本发明属于机械装备技术领域,涉及一种全地面起重机超起拉索预紧方法。步骤如下:S1:选择合适的工况,根据起吊高度、幅度等确定全地面起重机臂长L,根据臂长L确定放出超起拉索的长度H;S2:主臂伸长到放绳位置,卷扬机放出长度为H的超起拉索,锁紧装置锁死;S3:主臂伸缩油缸推动二节臂伸长,使臂长达到L,实现预紧。本发明预紧的原理为:主臂伸缩油缸推动主臂伸长,超起拉索上端铰点随着主臂伸长而向外伸出,拉索两铰点间距增大,实现了拉索的张紧。本发明简化结构,节约准备时间,减少作业步骤,可以有效取代超起撑杆中的张紧油缸,简化液压系统,节约制造成本,充分利用伸缩臂油缸提供较大的预紧力,使起重机起重性能最大化。
Pre-tightening method for super-lift inhaul cable of all-terrain crane
一种全地面起重机超起拉索预紧方法
2020-09-25
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES |
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