a schwingungsdumpfer contracting arrangement

摘要

The present invention relates to an arrangement and to a method relating to a swing damper ( 1 ) for carrying a tool ( 5 ) that hangs from a crane arm ( 2 ). The swing damper ( 1 ) includes an upper part ( 11 ) connected to the crane arm ( 2 ), and a lower part ( 12 ) that carries a working implement ( 5 ) either directly or via a rotator ( 4 ),. The upper and the lower parts are pivotally connected via a pivot joint ( 13 ). The swing damper ( 1 ) also includes a brake arrangement ( 50 ). including a brake unit ( 60 ) having discs ( 70, 80 ) pivotal about a pivot shaft ( 14 ) of the swing joint ( 13 ), at least one ( 70 ) of the discs being secured against rotation relative to the upper part ( 11 ), and at least one( 80 ) of the discs being secured against rotation relative to said lower part ( 12 ), and a tensioning element ( 90; 110; 130 ) for pressing the discs ( 70, 80 ) together in a braking operation.