Buffer device for relieving collision of gantry crane

A buffering device for relieving collision of a gantry crane belongs to the technical field of buffering devices and comprises a moving unit mounted at the bottom end of the outer wall of the gantry crane and further comprises a fixing unit, the moving unit is arranged in an inner cavity of the fixing unit in a pluggable mode, and the fixing unit comprises a supporting assembly, a blocking assembly, a buffering assembly and a prompting assembly. According to the utility model, a plurality of groups of limiting pins are used for blocking the positioning disc and synchronously and dispersedly blocking multiple points, the problem that a single limiting pin is easy to break can be effectively avoided, in addition, through the linkage effect between the limiting pins, after individual limiting pins fail, the multi-point buffering and blocking effect on the gantry crane can still be realized, and the safety of the gantry crane is ensured. The whole buffer device does not need to be replaced, the equipment updating