The invention relates to a rear steering drive axle of a cross-country forklift, which belongs to the technical field of engineering machinery accessories. The rear steering drive axle comprises an axle housing, a main speed reduction assembly, a knuckle assembly hub and hubs; the axle housing is hollow, and a steering driving shaft penetrates through the axle housing; the main speed reduction assembly is located in the middle of the axle housing; a gear is connected with the middle of the steering driving shaft, and the two ends are connected with the hubs through knuckle assemblies respectively; a mounting frame is connected with the middle of the axle housing; the rear side is connected with hydraulic cylinders; the tail ends of hydraulic rods of the hydraulic cylinders are hinged to one ends of steering joints on the two sides; wheel edge half shafts of the hubs penetrate through shaft tubes respectively, are connected with the shaft tubes in a relatively rotating mode and are hinged to the two ends of the steering driving shaft through steering pieces respectively; the two ends of the steering driving shaft and the two ends of an inner cavity of the axle housing are provided with two check rings respectively; and a fluororubber oil seal is arranged between the two check rings at the two ends. The rear steering drive axle is large in torque, high in load capacity and capable of being applied to the field environment.

本发明涉及一种越野叉车后转向驱动桥，属于工程机械配件技术领域。所述后转向驱动桥包括桥壳、主减速总成、转向节总成轮毂和轮毂，所述桥壳中空，内穿有转向驱动轴，主减速总成位于桥壳的中部，齿轮连接转向驱动轴的中部，两端分别通过转向节总成连接轮毂，桥壳中部连接有安装架，后侧连接有液压油缸，液压油缸的液压杆的末端分别铰接两侧转向接头的一端，轮毂的轮边半轴分别穿过轴管并与之相对转动连接，并分别通过转向件与转向驱动轴的两端铰接，转向驱动轴的两端与桥壳内部空腔的两端分别设有两道挡圈，两端的两道挡圈之间设有氟橡胶油封。本发明的后转向驱动桥扭矩大，负载能力强，可应用于野外环境。