Traveling crane for portal frame hoisting equipment

The invention relates to the technical field of cranes, in particular to a traveling crane for portal frame hoisting equipment. The traveling crane which comprises a cross beam, wherein a lower rail and a wing plate are fixedly mounted on the cross beam, a groove is formed in the wing plate, a rack is fixedly mounted in the groove, a pressing plate is connected to the wing plate, a guide wheel is rotatably mounted on the pressing plate, a clamping plate is fixedly mounted on the pressing plate, a driving shaft is rotatably installed on the clamping plate, a crawling gear is fixedly installed on the driving shaft, a function box is fixedly installed on the clamping plate, a guide rail is fixedly installed on the function box, a sliding base is slidably installed on the guide rail, a reset spring and a magnet are fixedly connected to the sliding base, an electromagnet is fixedly installed on the function box, and a bracket is fixedly mounted on the sliding base. A stability maintaining and obstacle removing tro