Articulated vehicle

In an articulated vehicle including a front sub-chassis and a rear sub-chassis each having a respective front and rear pivot axis and at least one drive axle, a main chassis pivotally supported by each sub-chassis for relative pivotal movement about the respective pivot axes, a mechanism for communicating constant velocity power between the sub-chassis having an intermediate shaft which extends substantially along the centerline of the main chassis when the centerlines of the sub-chassis and the main chassis are aligned, universal joints on the ends of the intermediate shaft connected respectively to a front shaft extending substantially along the centerline of the front sub-chassis and a rear shaft extending substantially along the centerline of the rear sub-chassis, steering means for causing the front sub-chassis to pivot relative to the main chassis, and control means for controlling the pivoting of the rear sub-chassis relative to the main chassis in response to the pivoting of the front sub-chassis, the improvement in the control means comprising:

• menas for controlling pivoting of the rear sub-chassis so that, during turning, the centerlines of the front and rear sub-chassis intersect each other at a point whose locus of travel is nearer to the front pivot axis of the front sub-chassis than to the rear pivot axis of the rear sub-chassis, and the universal joints of the intermediate shaft are positioned equidistant from said point of intersection.