Arm guard structure for pallet truck

The protective arm structure comprises a supporting frame, two rotating sleeves arranged in a bilateral symmetry mode and two protective arms arranged in a bilateral symmetry mode, the left end and the right end of the supporting frame are each vertically provided with a sleeve in a penetrating mode, the sleeves and the supporting frame are welded and fixed, and the two rotating sleeves vertically penetrate through the sleeves respectively. A rotating shaft extending downwards is fixed to the rear end of each protection arm, and the lower ends of the two rotating shafts are in transmission connection with one rotating sleeve. The arm guard structure further comprises an air spring, connecting blocks are welded and fixed to the outer side walls of the lower ends of the two rotating sleeves, and the two ends of the air spring are rotationally connected with the connecting blocks correspondingly. Through the arrangement of the gas spring, after the two protective arms are rotationally opened relative to the supp