A telescoping lift arm assembly (22) has an outer lift arm tube (40, 140, 200, 250) that has spaced side walls (58, 158, 206, 258), and outwardly extending flange guide panels (60, 160, 210, 260) at the lower portions of the side walls. An inner lift arm tube (42, 142, 218, 252) is generally bell-shaped and fits into the outer lift arm tube (40, 140, 200, 250). The inner lift arm tube (42, 142, 218, 252) is held in place with a cross support plate (82, 182, 232, 286) that is supported on the outer lift arm tube (40, 140, 200, 250). There are linear bearings (80, 80A, 84, 84A, 180, 180A, 184, 184A, 228, 234, 272) between the mating outwardly flared flanges (74, 174, 222, 270) and panels (60, 160, 210, 260), as well as between the support plate (82, 182, 232, 286) and mating lower surfaces of the inner lift arm tube (42, 142, 218, 252).
展开▼
