Terex Demag Gmbh

Terex-demag Gmbh & Co. Kg

Ingo Noeske

Alfons Weckbecker

Werner Rutz

Axel Beckmann

Ruediger Zollondz

Guenter Karp

Thorsten Scharf

The invention concerns a lattice boom crane, which is composed of at least two individual lattice boom cranes (), which each comprise a luffing lattice boom (), whose luffing angle is adjustable by a luffing mechanism (). The lattice booms () of the individual lattice boom cranes () are connected with each other and oriented in parallel and adjacent to each other and the luffing mechanisms () of the lattice boom cranes () are synchronously operated, such that the rigidly-connected lattice booms () are synchronously luffable.

Lattice boom crane for lifting heavy loads

The present invention relates to a rope winding system () for winding and unwinding a steel rope () of a crane (). A rope winding system () according to the present invention has a rope drum (), onto which the steel rope () can be wound in a plurality of layers, and a magnetic system () which is configured to generate a magnetic field over a section of the steel rope () with its magnetic flux being deflected by a movement of the steel rope () in such a way that the steel rope () is braked. A crane () is also discloses which is equipped with such a rope winding system () for winding and unwinding a steel rope ().

Rope winding system for winding and unwinding steel ropes of cranes

The invention refers to a truck roller assembly () for a crawler chain comprising at least two spaced track roller portions (') with running surfaces for running on the crawler chain (), and a star-shaped element () for guiding the track roller assembly () on the crawler chain (). The star-shaped element () is mounted freely rotatably between the at least two track roller portions (&#x2032;), and it is provided with a plurality of teeth (). The teeth () co-operate with the crawler chain () in such a way that on rolling over chain links () of the crawler chain () they engage into corresponding gaps () in the crawler chain (). The teeth () extend beyond the running surfaces of the at least two track roller portions (&#x2032;) and between projections () of the crawler chain () such that it is ensured that the crawler chain () Is not displaced laterally relative to the track roller portions () and does not roll up on to the projections () of the crawler chain (). In an alternative embodiment the star-shaped element is replaced by an idling roller ().

Track roller assembly for the crawler chain of a crawler chassis

The invention proposes a hoisting-cable drive for a mobile crane, which hoisting-cable drive uses a single bottom-hook block () instead of a known double bottom-hook block. However, to prevent this single bottom-hook block () from tilting in the two cable lines (), for example due to possible variations in the elongation of the two cable drives, the hoisting-cable drive according to the invention comprises a kinematic force equilibrium device (), which can equalize such differences. To this effect, another embodiment of the hoisting-cable drive according to the invention uses a hoisting-cable load pickup () within each cable line arrangement so that the rotary speed of the winches () can be varied, taking into account any load differences in the individual hoisting-cable lines (). Furthermore, the invention also proposes that the rotary speed of the winches () be adjusted, taking into account the geometric winch states and crane states.

Growing community of inventors

Zweibruecken, Germany

Ingo Noeske