Duplex Lift Mast
General Information
A high lift AGV uses a duplex telescopic mast for enabling high lift height with a normal height of the vehicle.
The duplex mast of a forklift AGV is made of pre-fabricated C-profiles of a type commonly used in manual forklift trucks. The mast has rollers welded to it and these rollers runs inside the fixed mast C-profiles. The fork carriage runs with its rollers inside the duplex mast C-profiles.
The lift nut lifts the duplex mast and it lifts the lift chains over the chain wheels. The lift chains are attached to the top crosstie of the fixed mast and to the fork carriage. The fork carriage will run twice as fast as the lift nut and the duplex mast.
As an option can the fork have a separate lift unit making it possible with high lift heights and a low vehicle. There may also be a third mast for very high lift heights, up to seven meters.