Lifting system and lifting method for a crane
AssigneeLiebherr-Werk Ehingen GmbH
InventorUlrich Wiedemann
Life of this patent
Estimating the term…
Abstract
A lifting system for a crane for generating a hoist rope pretension during a travel of a suspension element of the crane is provided. The system includes a separable pretension hook block and a connected auxiliary rope that is supported in a windable and unwindable manner on an auxiliary winch on the crane, and that is guided over a deflection apparatus arranged or installable at a boom of the crane. The pretension hook block comprises two lockable hook block parts that are releasably lockable to one another, that are connected to one another via the auxiliary rope, and of which an upper hook block part has a fastening means for fastening to the suspension element of the crane and a lower hook block part has a pick-up means for fastening a weight.
Claims20
A lifting system for a crane for generating a hoist rope pretension during a travel of a suspension element of the crane, the lifting system comprising:
- a separable pretension hook block;
- and
- an auxiliary rope that is connected to the pretension hook block, the auxiliary rope is supported in a windable and unwindable manner on an auxiliary winch arranged or installable on the crane, and that is guided via a deflection apparatus that is arranged or installable at a boom of the crane, wherein the pretension hook block comprises two hook block parts that are releasably lockable to one another, that are connected to one another via the auxiliary rope, and of which an upper hook block part has a fastening means located at an upper side of the upper hook block for lashing or fastening the pretension hook block to the suspension element and a lower hook block part has a pick-up means for fastening a weight, wherein the pretension hook block comprises a guide mechanism by which the lower and upper hook block parts are configured to be brought into a defined locked position on bringing together.
A lifting system for a crane for generating a hoist rope pretension during a travel of a suspension element of the crane, the lifting system comprising:
- a separable pretension hook block;
- an auxiliary rope that is connected to the pretension hook block, the auxiliary rope is supported in a windable and unwindable manner on an auxiliary winch arranged or installable on the crane, and that is guided via a deflection apparatus that is arranged or installable at a boom of the crane, wherein the pretension hook block comprises two hook block parts that are releasably lockable to one another, that are connected to one another via the auxiliary rope, and of which an upper hook block part has a fastening means located at an upper side of the upper hook block for lashing or fastening the pretension hook block to the suspension element and a lower hook block part has a pick-up means for fastening a weight;
- a hoist winch on which a hoist rope connected to the suspension element is supported in a windable and unwindable manner;
- and
- a crane control that is configured to control the hoist winch and the auxiliary winch synchronized such that a weight fastened to the pretension hook block that is unlocked is held suspended at a certain height or in a certain region above ground during a travel of the suspension element by reeling up the hoist winch and simultaneously unreeling the auxiliary winch.
Dependencies are inferred from the claim text.