Running trolley of rail-mounted double-beam crane

The running trolley comprises a trolley body, a driving motor is installed on one side of the center of the outer wall of the top of the trolley body through bolts, wheel grooves are formed in the periphery of the inner wall of the bottom of the trolley body, and limiting blocks are welded to the outer wall of the side, close to the wheel grooves, of the trolley body; a transmission shaft rod is movably connected into the limiting block through a bearing, a driving wheel and a driven wheel are welded to the end, close to the wheel groove, of the transmission shaft rod, and a chain wheel is in flat key connection to the outer side wall, close to the wheel groove, of the transmission shaft rod. The driving force is higher when the trolley body moves, the stability of the trolley body in the moving process is guaranteed, the rubber block can play a good anti-collision buffering role on the trolley body, the trolley body is well protected, the interior of a rail can be effectively cleaned in time when the trolley