Link for midline-based dual risers with low single-lift cylinders and low-profile self-propelled aerial work platforms

摘要

The present invention relates to a lower boom assembly having a pair of compression arms (9) and tension arms (10) pivotally connected between a support frame (1) and a floating frame (11) on a vehicle, and a work platform Includes a top boom assembly having a pair of compression arms 16 and tension arms 17 pivotally connected between a floating frame 11 and a riser 6 connected to a central end of an elastic boom assembly 7 Profile self-propelled aerial work platform having a folding parallelepipedal boom assembly (5) that is adapted to be folded in parallel. The ends of the tension arms 17,10 of the upper and lower boom assemblies pivotally connected to the floating frame 11 share the same pivot connection 15 so that when the folding parallelogram 5 is in the overlap position, 17, 10) are placed in a pod in a common plane, the vehicle can be operated through a low entrance of 6 feet 7 inches. The simultaneous connection portion 33 is mounted on the floating frame 11 to allow the upper and lower boom assemblies to move in the vertical direction while the compression arms 16 , 9).