Patent ID: 7451993
Filing Date: 2008-11-18
Classification: B60G,B62D

Abstract:
1. A steerable chassis for a work vehicle, comprising two chassis portions, respectively a front portion and a rear portion, which are mutually connected and can rotate with respect to each other about a substantially vertical axis and about a substantially horizontal axis that is parallel to the longitudinal axis of the working vehicle, said steerable chassis further comprising a device for locking the relative rotation of said chassis portions about said substantially horizontal rotation axis, said device comprising a rocker member and an actuation means for limiting rocking motion of said rocker member, said actuation means being an hydraulic actuation means comprising at least one hydraulic cylinder associated with a piston, said two chassis portions, respectively the front portion and the rear portion, being connected by virtue of a complex coupling that comprises a hinge, whose rotation axis coincides with said substantially vertical axis, and an articulation, whose rotation axis coincides with said substantially horizontal axis, said articulation being comprised of a shaft that is rigidly coupled to the front chassis portion and is pivoted in a bush that is rigidly coupled to the rear chassis portion, said rocker member being rigidly coupled to said shaft and being provided with two substantially horizontal arms, each of which can be abutted against a movable end of a respective hydraulic piston that has a substantially vertical axis, each said piston having a respective hydraulic cylinder that is rigidly coupled to said rear chassis portion.