Patent ID: 9415978
Filing Date: 2016-08-16
CPC Classification: B66C,B66D,F03D,F05B,Y02E

Claim Text:
1. Crane with double wire guide and anchoring bracket arranged in a nacelle of a wind turbine for hoisting-up and -down heavy parts of the wind turbine arranged in the nacelle said crane comprises a crane yaw and an external winch with wire, located near the base of the tower of the wind turbine, said winch being connected via the wire guide to a pulley block comprising a crane hook at the end of a jib arm, wherein the wire guide comprises a first fixed part arranged on the anchoring bracket for the crane, and a therewith cooperating second part, arranged in a second pivotal part of the crane, said second pivotal part being connected with the first part by the wires, where the first fixed part comprises a first elongated console, the free ends of which each comprises first track cut wire wheels, and between said first track cut wire wheels, further two, by a first pivot connection and a second pivot connection mounted second track cut wire wheels, so arranged on the console, that the bottom of the tracks in the second track cut wire wheels at any time are located on the tangent line between the bottom of the tracks in the first track cut wire wheels, and where the second part of the wire guide is located in a level above the first fixed part and comprises by a third pivot connection and a fourth pivot connection mounted third track cut wire wheels, whereby the bottom of the third track cut wire wheels are pivotal around their uppermost located tangent and where the second part further comprises fourth fixed mounted track cut wire wheels and where the tangent lines between respectively the first and the second set of track cut wire wheels and respectively the third and fourth track cut wire wheels are running in parallel.