Self-locking walking trolley

The utility model provides a self-locking type walking trolley, which relates to the technical field of I-shaped steel walking trolleys and comprises a mounting frame, a bearing part is arranged on the mounting frame, one side of the mounting frame is connected with a fixing frame, a guide rod and an auxiliary moving part are arranged on the fixing frame, one end of the guide rod is connected with a mounting plate, and a rotating part is arranged on the mounting plate. A hook and a cam are arranged on the rotating part, and a sliding block matched with the cam is arranged on the guide rod in a sliding fit mode; the motor is matched with the speed reducer, so that the clamping force between the driving wheel and the I-shaped steel rail can be correspondingly adjusted according to the weight of goods in the moving process, namely when the goods are light, the pressing force of the cam on the sliding block is small, at the moment, the pressing force between the driving wheel and the inner wall of the I-shaped st