阅读说明：本技术 一种臂架自重平衡的门座起重机单臂架变幅机构 (Luffing mechanism with balanced deadweight of jib for single jib of gantry crane ) 是由 裴看看 王全先 于 2021-09-07 设计创作，主要内容包括：本发明公开一种臂架自重平衡的门座起重机单臂架变幅机构,属于起重运输机械技术领域,用于起重量2-10吨,最大变幅距离12-20米范围的中型单臂架式门座起重机。该单臂架变幅机构包括回转台、臂架、变幅卷扬驱动装置、变幅钢绳组、人字架、臂架平衡装置及限位块,臂架及其变幅卷扬驱动装置与臂架平衡装置嵌套配置,臂架自重可通过臂架平衡装置得到基本平衡,利用限位块和平衡梁与人字架相互之间的结构限制,能够防止臂架的倾翻,保证变幅机构的安全,同时降低变幅过程中臂架自身摆动产生的能耗。(The invention discloses a single-boom luffing mechanism of a gantry crane with a balanced boom dead weight, belongs to the technical field of hoisting and transporting machinery, and is used for a medium-sized single-boom gantry crane with a hoisting capacity of 2-10 tons and a maximum luffing distance of 12-20 meters. The single-boom luffing mechanism comprises a rotary table, a boom, a luffing winch driving device, a luffing steel rope group, a propeller strut, a boom balancing device and a limiting block, wherein the boom and the luffing winch driving device are nested with the boom balancing device, the self weight of the boom can be basically balanced through the boom balancing device, and the boom can be prevented from tipping over by utilizing the structural limitation among the limiting block, a balance beam and the propeller strut, so that the safety of the luffing mechanism is ensured, and the energy consumption generated by the self-swinging of the boom in the luffing process is reduced.)