Monoblock jib for hydraulic crane and excavator - comprises three sections, viz. front, middle and lower parts connected at joint points with bearings

摘要

The monoblock is made of three sections, a front (1), middle (2) and under (3) part. Each of the three sections of the jib comprises an upper girder, a lower girder and side walls, the front part has a front bearing position (4) and on the other side a roof-shaped centering strip with burls. The middle part (2) of the jib determining the curvature has a further bearing point above the upper girder and another such point (9) beneath the lower girder. The lower part (3) at the rear end has a further bearing point (10) and at the front has a joint position (20), also provided with similar centering strip. USE/ADVANTAGE - For a crane or excavator which requires little material usage, and is economical to produce.