RING LIFT CRANE

摘要

The invention relates to a ring lift crane, comprising a liftable ring which has several segments which can be joined to each other and forms a circular track within which a standardized lower bogie is positioned. Said lower bogie has a standardised upper bogie which is connected to same in a rotating manner and presents several winches, and two uprights which are positioned parallel and at a distance to each other and at two opposite end areas have one adapter each and are connected by bolting/unbolting to the upper bogie by means of cross-bars. By means of rollers arranged in the end area of the adapters said adapters rest in a rolling manner on the circular track of the ring. The centre of the ring or lower bogie forms the axis of rotation. One of the adapters is configured for receiving a counter-weight and the other adapter is configured for supporting an articulated boom. Means are provided for which allow for the generation of the rotating movement of the ring lift crane. The lower bogie is joined to various sections of the ring by means of reinforcing bars. To move the crane into different operating modes the uprights (17, 17') can be lifted in relation to the base apparatus and joined in different manners to the cross-bars (26, 27) in a non-positive fit. In the initial position the positive fit between the uprights (17, 17') and the cross-bars (26, 27) presents a predeterminable play (79, 79'). To permit the rotating movement of the crane gantry the invention provides for several trolleys (18) of identical structure which have two axles and wheels fixed to same. The trolleys can be connected in a positive fit with both the uprights (17, 17') and the ring or a ring segment (20a, 20e).