Rear supporting leg of bridge girder erection machine

The utility model discloses a rear supporting leg of a bridge girder erection machine, which comprises a hinged support, an outer sleeve column, an inner sleeve column, a connection frame, a lower cross beam, a telescopic adjusting device, a walking wheel set, a transverse moving mechanism, an inclined supporting rod and a first driving system, the hinged support, the outer sleeve column, the inner sleeve column, the connection frame, the lower cross beam, the telescopic adjusting device, the walking wheel set, the transverse moving mechanism, the inclined supporting rod and the first driving system. The telescopic adjusting device drives the rear supporting leg to stretch out and draw back, the first driving system drives the rear supporting leg to rotate, and the rear supporting leg of the bridge erecting machine can achieve the telescopic and rotating functions and is simple in structure, small in occupied space and convenient to operate. 本实用新型公开了一种架桥机后支腿，包括铰座、外套柱、内套柱、联系框架、下横梁、伸缩调节装置、走行轮组、横移机构、斜撑杆、第一驱动系统，铰