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1.存在问题国产中、小吨位伸缩臂起重机大都设置4节吊臂,且采用伸缩缸加绳排的同步伸缩机构进行吊臂伸缩。该同步伸缩机构的特点是第3、4节吊臂采用钢丝绳伸缩,第2节吊臂采用伸缩缸伸缩。吊装作业中,该同步伸缩机构存在以下问题:当吊臂同步伸出时,伸缩缸末端支架会滑出第4节吊臂;当吊臂同步缩回时,伸缩缸末端支架会进入第4节吊臂。由于伸缩缸很长(一
1. Existing problems Domestic small and medium tonnage telescopic boom cranes are mostly equipped with 4 jibs, and the telescopic cylinder plus ropes of the synchronous telescopic boom telescopic boom. The synchronous telescopic mechanism is characterized by the first 3, 4 jib telescopic rope, 2 jib telescopic telescopic cylinder. During hoisting operation, the synchronous telescopic mechanism has the following problems: when the boom is extended synchronously, the telescopic cylinder end bracket will slide out of the fourth boom; when the boom is retracted synchronously, the telescopic cylinder end bracket will enter the fourth quarter Boom As the telescopic cylinder is very long (one