Articulated jib crane mounted on vehicle - has column supported in base to tilt on girder into horizontal stowed position on vehicle chassis

摘要

The articulated-jib crane is mounted on a vehicle, having a horizontal supporting girder (1) for fixing to the chassis (3), with a base (4) in which a column (5) slews about an axis (A), a jib (6) being mounted on the column. The base tilts on a horizontal axis (B) on the girder and at right angles to it, so that the crane can be hinged between the upright working and the horizontal stowed positions. The base can have a tubular body (7) forming a bearing housing (8, 10) for the column, and mounted at the lower end in a pivot bearing (14) on the girder, and also by means of a bearing trunnion (16) in an additional bearing (15) fixed to the chassis.