| 摘要 |
A crane (100; 200; 300), comprising: a rotatable base (102); an inner boom (118A) extending from a base (102) end to a first knuckle end, the base end pivotally connected at a base pivot point to the rotatable base such that the inner boom (118A) is pivotable in a vertical plane about the base pivot point; an outer boom (118B) extending from a second knuckle end to a boom tip (132), the second knuckle end pivotally connected at a knuckle pivot point to the first knuckle end of the inner boom (118A) such that the outer boom (118B) is pivotable in the vertical plane about the knuckle pivot point; a plurality of guide assemblies (142) arranged along the length of the inner and outer boom (118A, 118B) and adapted for guiding a plurality of parallel extending lines (110) along the inner and outer boom (118A, 118B), the plurality of guide assemblies (142; 242; 342) comprising a first guide assembly at or near the base end of the inner boom (118A), a second guide assembly at or near the knuckle pivot point, and a third guide assembly at or near the boom tip (132), the second guide assembly being the sole guide assembly at or near the knuckle pivot point. |
