| 摘要 |
The invention relates to a crane jib telescoping system for a telescopic crane jib which comprises a telescopic main jib (1) and telescopic auxiliary jib (11), comprising at least one telescoping cylinder (2) and a first telescopic part locking unit (3) which is arranged in the base portion of the telescoping cylinder (2), wherein a second telescopic part locking unit (4) is arranged on the telescoping cylinder (2) for telescoping the auxiliary jib (11) above the first telescopic part locking unit (3). It also relates to a crane jib system comprising a telescopic main jib (1) and a telescopic auxiliary jib (11) and comprising such a telescoping system, using the second telescopic part locking unit (4) of which the auxiliary jib can be telescoped in and out. |
