Gantry crane cart driving chain dismounting and mounting device

The utility model relates to the technical field of gantry crane accessory devices, in particular to a gantry crane cart driving chain disassembling and assembling device. Comprising a tensioning mechanism and a chain cutting mechanism, the tensioning mechanism comprises two connecting plates, two first threaded rods penetrating through the two connecting plates, and nut sets connected to one ends of the threaded rods in a threaded mode; the chain cutting mechanism comprises a U-shaped clamp, one end of the U-shaped clamp is fixedly connected with a threaded sleeve, the threaded sleeve is in threaded connection with a second threaded rod, and the other end of the U-shaped clamp is fixedly connected with a supporting ring. 本实用新型涉及龙门吊附属装置的技术领域，特别是涉及一种龙门吊大车驱动链条拆装装置；包括拉紧机构和截链机构，所述拉紧机构包括两块连接板，穿过两块连接板的两根螺纹杆一，以及螺纹连接在螺纹杆一端部的螺母组；所述截链机构包括U型卡，U型卡的一端固定连接螺套，螺套上螺纹连接螺纹杆二，U型卡的另一端固定连接支撑环。