SELF-PROPELLED CART FOR TRANSPORTING HEAVYLOADS

摘要

Self-propelled cart (1) for transporting heavy loads of the type comprising: a chassis (2) having, on top, a substantially horizontal loading deck (3) supporting the item to be transported; and a series of vertical-axis pivoting wheel assemblies (4) that are arranged beneath the chassis (2) and each of which comprises: a slewing bearing (10) which is fixed on the chassis (2) with the capability of rotating about said reference axis (A); a servo-motor (11) which is adapted to rotate, on command, the slewing bearing (10) about said reference axis (A); a horizontal axle (12) which is located beneath the slewing bearing (10), is connected to the slewing bearing (10) so as to rotate together with the latter, and is provided with at least two ground-resting wheels (13) coaxial to one another; and an active suspension (14) which is interposed between the horizontal axle (12) and the slewing bearing (10) and is adapted to vary, on command, the distance (d) between the plane on which the slewing bearing (10) lies and rotates and the rotation axis (R) of the two wheels (13); the horizontal axle (12) of at least one of said pivoting wheel assemblies (4) comprising: a central hub (17) that extends between the two wheels (13) of the axle substantially coaxial to the wheels rotation axis (R) and is laterally connected to the slewing bearing (10) via a hinge (18) that allows the central hub (17) to swing about a first axis (B) substantially perpendicular to said reference axis (A) and substantially parallel and spaced from the wheel rotation axis (R); and an engine (15) adapted to drive into rotation the wheels (13) of the axle about the common rotation axis (R).