HEAVY VEHICLE LIFTING DEVICE AND METHOD

摘要

A universal lifting device for elevating heavy off-the-road vehicles, e.g. mechanical shovels used in mining operations, is proposed to raise the upper revolving section of the shovel and allow for its lower wheeled base to be removed with a view to attending to the maintenance, for instance, of the rotation mechanism of the shovel. The lifting device comprises front and rear lifting beams to which various type of brackets can be removably mounted to ensure a proper positioning of the front and rear lifting beams with respect to the revolving frame of different models of mechanical shovels. Front and rear lifting points are provided to control the vertical displacement of the front and the rear lifting beams, respectively. Typically, each such lifting point includes a pair of cylinders mounted in parallel fashion, an absolute lifting elevation detector and a piston stroke length detector which are connected to an automaton adapted to control the lifting operation of the revolving frame of the mechanical shovel.