MÂT TRIPLE DE LÈVE-PALETTE À LEVÉE LIBRE TOTALE PRÉSENTANT UNE VUE D'OPÉRATEUR OPTIMISÉE

摘要

The invention relates to a full free-lift triplex forklift mast assembly with increased operator forward view, including an outer mast (1), a middle mast (11), an inner mast (16) and a carriage (30), comprising a pair of lift cylinders (8), located rearwardly of the outer mast (1), mounted on top of lower cross-tie (31), which upon commands from the operator extend or retract, thus move the middle mast (11) accordingly in vertical direction, without said lift cylinders (8) obstructing the space between the inner mast profiles (29), a pair of lift chains (3), driving the inner mast (16) in vertical direction, with each connected to an outer mast chain anchor (5) on one end, and to a multifunctional lift base (22) on the other end, disposed over laterally symmetrically positioned lift chain pulleys (13), which are mounted to the middle mast upper cross-tie (32) rearwardly of the middle mast (11), without said lift chains (3) obstructing the space between the inner mast profiles (29), a pair of free-lift cylinders (21), located rearwardly of the inner mast (16), mounted on top of each multifunctional lift base (22), which upon commands from the operator extend or retract, thus move the free-lift chain pulleys (20) accordingly in vertical direction, without said free-lift cylinders (21) obstructing the space between the inner mast profiles (29), a pair of free-lift chains (18), driving the carriage (30) in vertical direction, with each one connected to an inner mast chain anchor (19) on one end, and to a carriage anchor (25) on the other end, disposed over laterally symmetrically positioned free-lift chain pulleys (20) which are mounted on top of the free-lift cylinders (21), with said free-lift chains (18) providing maximized forward visibility through the mast assembly.