High clearance tractor for use in vineyard, has jack, frame, sleeve and beam to vary wheel-base between trains, where each wheel of rear trains is associated to positioning unit which is bound to orientation of front wheel

摘要

The tractor has a jack, a frame, a sleeve and a beam to vary wheel-base between a front train including a wheel (10), and two rear trains (2, 3) with two corresponding wheels (20, 21, 30, 31) for a given path. Each of the rear wheels is associated to a positioning unit in rotation which is bound to orientation of the wheel (10), and to length of the wheel-base and breadth of the path.