摘要:
A carrier track assembly for extensible and retractable boom machines wherein the carrier track assembly (22) is positioned within the telescopic boom sections (8, 12) and has one end (23) connected to the extension and retraction fluid cylinder (13) in the base boom section (8) and the opposite end (24) connected to the inner end of the next adjacent extensible and retractable boom section (12), the carrier track assembly (22) being supported by the extension and retraction fluid cylinder (13) when the boom section (8, 12) are fully extended. An elevated support member (26) is secured to the fluid cylinder (13) at a position between the inner end of the base boom section (8) and the end connection (23) of the carrier track assembly (22) on the fluid cylinder (13), the carrier track assembly (22) being reversely bent (25) upon itself and supported by the elevated support member (26) when the boom sections (8, 12) are fully retracted.
摘要:
A vehicular low profile self propelled aerial work platform assembly having a turntable (3) positioned in a horizontal plane in close proximity to the axles (21) of the vehicle. A parallelogram linkage (5, 6) is provided between a superstructure support frame (1) carried by the turntable (3) and a riser frame assembly (9) to which one end of a telescopic boom assembly (12) is pivotally connected (14), the aerial work platform (13) being mounted on the outermost end of the telescopic boom assembly. A counterweight (2) is detachably connected to the support frame (1) and is formed with a trough (33) aligned with a similar trough (32) provided in the support frame (1), the parallelogram linkage includes a pair of tubular arms (5, 6) which extend through the troughs (32, 33) when the work platform (13) is in the lowermost position. When in the lowermost position, the height of the pivotal connection (14) of the telescopic boom assembly (12) to the riser frame assembly (9) is approximately eight feet allowing the assembly to be employed in warehouses and manufacturing plants having low and narrow doorways and aisles. The support frame (1) and parallelogram linkage assembly (5, 6, 9) are symmetrical with respect to the centerline of the machine to thereby distribute stresses equally through the machine. When in the elevated position, the superstructure support frame (1), parallelogram linkage assembly (5, 6, 9), and counterweight (2) are positioned within the wheelbase of the vehicle to thereby provide a zero tailswing.
摘要:
A tie rod extendable and retractable telescopic axle assembly (1) wherein a pair of axle beams (12, 13) are slidably mounted in a box beam (11) integral with a vehicle chassis (8). Steering linkage (16) and associated wheel assemblies (15) are mounted on the outer ends of the axle beams (12, 13), and the inner ends of the axle beams (12, 13) within the box beam (11) are telescopically mounted relative to each other which provides an increased wheel base when the axle beams (12, 13) are moved outwardly of the box beam (11). A hydraulic cylinder (17) and piston rod assembly (21, 22) is mounted between the box beam (11) and wheel assemblies (15) so that the hydraulic cylinder (17) and rod assembly function (21, 22) not only as an actuator for extending and retracting the axle beams but also as a tie rod for the wheel assemblies (15).
摘要:
A carrier track assembly for extensible and retractable boom machines wherein the carrier track assembly (22) is positioned within the telescopic boom sections (8, 12) and has one end (23) connected to the extension and retraction fluid cylinder (13) in the base boom section (8) and the opposite end (24) connected to the inner end of the next adjacent extensible and retractable boom section (12), the carrier track assembly (22) being supported by the extension and retraction fluid cylinder (13) when the boom section (8, 12) are fully extended. An elevated support member (26) is secured to the fluid cylinder (13) at a position between the inner end of the base boom section (8) and the end connection (23) of the carrier track assembly (22) on the fluid cylinder (13), the carrier track assembly (22) being reversely bent (25) upon itself and supported by the elevated support member (26) when the boom sections (8, 12) are fully retracted.