Telescopic boom of a crane
AssigneeLiebherr-Werk Ehingen GmbH
InventorHans-Dieter Willim
Life of this patent
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Abstract
The within invention concerns a telescopic boom of a crane with a pivot section, telescoping sections that telescope out of the pivot section, and bracing that has at least one guy support housed on one of the sections and a guy cable supported on one of these guy supports. According to the invention, the telescopic crane is characterized by the presence of a guy cable running from the guy support and a cable lock that can be locked to said guy cable, in which the cable lock can be moved by means of an actuator, particularly an hydraulic cylinder, in the longitudinal direction of the guy and the guy cable can be pre-stressed by moving the cable lock.
Claims20
Telescopic boom of a crane, comprising a pivotally-mounted section (2),
- telescopic sections (3,4) arranged to telescope out of the pivotally-mounted section (2), and
- a guy system (5) comprising at least one guy support (6) pivotally housed on one of the sections (2, 3, 4), and a guy cable (7) adjustably-supported on this guy support (6) for winding or unwinding with respect thereto,
- wherein said guy cable (7) running from the guy support (6) has radially-thickened areas (25) positioned at discrete intervals along said cable (7), and
- the guy support (6) comprises a cable lock (22) positioned to engage the thickened areas (25) and lock the cable (7) in place or move away from the cable (7) to allow the cable (7) to wind or unwind.
Dependencies are inferred from the claim text.