ANORDNING AV SLANGFORING OCH HYDROULKOPPLING VID HYDRAULISKT MANOVRERAD KRAN

摘要

An arrangement in a hydraulically operated crane of the type having a supporting crane section and a movable crane arm system supported thereby and comprising support and guide means, telescopically extendable boom means including a first boom movably supported and guided by the support and guide means and a second boom supported by and telescopically movable in relation to the first boom; and drive means for moving the first boom in relation to the support and guide means and for moving the second boom in relation to the first boom; the drive means comprising an elongated flexible drive transmission means fixed to the support and guide means and extending into the first hollow boom through one end thereof and fixed to the second boom, the flexible transmission means being arranged such that a movement of the first boom in relation to the support and guide means will be transmitted by the flexible transmission means to the second boom for moving the latter in relation to the first boom a distance equal to the distance by which the first boom is moved in relation to the support and guide means.