Vehicle drive device with flexible crawler and vehicle thus obtained

Drive device with a flexible crawler for a vehicle with a chassis and at least one drive shaft supporting a hub, said device comprising a ready to fit unit for installing in a detachable manner on one side of said chassis, said unit comprising a flexible crawler wound around a drive wheel adapted for mounting on said hub and around a tension wheel carried by a support frame, said support frame comprising an internal part adapted for securing in a detachable manner on said chassis remote from said drive shaft, an intermediate part adapted for carrying said tension wheel and an external part carrying a bearing for said drive wheel,

• wherein said intermediate part of said support frame comprises a tensioning and damping mechanism acting on a wheel support which supports said tension wheel, wherein said intermediate part of said support frame furthermore comprises a beam integral with said tension in and damping mechanism and a mechanism with a deformable connection interposed between said beam and said wheel support.