Arrangement for damping the pendulum motion of the load of a crane, in particular a container crane

摘要

Known pendulum damping arrangements with four damping ropes run obliquely downwards from the trolley to the spreader bar are technically of very complicated construction in order to also obtain effective pendulum damping at extreme amplitudes of pendulum swing and in the case of a low load. This especially applies to the guidance of the damping ropes via deflection and return pulleys and mechanisms for avoiding slack-rope formation. The novel arrangement is intended to reduce this complexity and create favourable rolling conditions at a rope inclination varying with the lifting and lowering of the load. Each of the damping ropes (5, 6) is run from a rope drum (4) via a deflection pulley (7) down at an angle to the diagonally opposite corner of the load-suspension means (8). The deflection pulley (7) can be swivelled in two planes via joints by a split lever. While it automatically adapts itself to the varying inclination of the rope guidance, the force preventing slack-rope formation is produced by a spring element. The arrangement enables effective pendulum damping with exact guidance of the damping ropes to be achieved solely via the deflection pulley machine element. <IMAGE>