Floating rear axle of wheeled farming machine and wheeled farming machine

The invention relates to a rear axle structure of a wheeled farming machine. The wheeled farming machine comprises a left rear wheel, a right rear wheel and a whole machine frame; the rear axle structure comprises a left rear axle assembly and a right rear axle assembly, the left rear axle assembly and the right rear axle assembly are structurally symmetrical, the right rear axle assembly comprises a floating oil cylinder and a rear axle frame, one end of the rear axle frame can be fixedly mounted on the whole machine frame of a wheeled sugar cane machine, the other end of the rear axle framecan be fixedly mounted on the right rear wheel, and the frame body of the rear axle frame is connected with the extending end of an piston rod of the floating oil cylinder; and the other end, oppositeto the extending end of the piston rod, of the floating oil cylinder can be fixed to the whole machine frame. 本发明涉及一种轮式农机的后桥结构，所述轮式农机包括左后车轮、右后车轮和整车机架；所述后桥结构包括左后桥总成与右后桥总成，左后桥总成和右后桥总成结构对称，所述右后桥总成包括浮动油缸和后桥架，所述后桥架一端能够固定安装在所述轮式甘蔗机