Supporting leg mechanism of bridge girder erection machine

The utility model relates to a supporting leg mechanism of a bridge girder erection machine, which comprises a lattice type telescopic upright post assembly, a positioning piece which is detachably arranged on the telescopic upright post assembly and a telescopic driver which can be detachably arranged on the telescopic upright post assembly. The telescopic driver can drive the telescopic stand column assembly to stretch and retract, and the positioning piece can position stretching and retracting of the telescopic stand column assembly. The supporting leg mechanism has the advantages of being capable of achieving large height difference adjustment, wider in application range, light in structure, better in supporting effect and higher in stability. 本实用新型涉及一种架桥机的支腿机构，其中，包括格构式的伸缩立柱总成、可拆卸地安装在所述伸缩立柱总成上的定位件以及能够可拆卸地安装在所述伸缩立柱总成上的伸缩驱动器。所述伸缩驱动器能够驱动所述伸缩立柱总成伸展和收缩，所述定位件能够对所述伸缩立柱总成的伸展和收缩进行定位。其有益效果是，该支腿机构能够实现大高差调节，适用范围更广，且结构轻便，支撑效果更好，稳定性更高。