US 7,137,518 B2Granted

Telescopic crane

AssigneeTerex Demag GmbH

InventorsMichael Irsch, Conrad Frank, Jens Fery, Walter Zimmer, Walter Stowasser, Oliver Fries, Roland Kuhn, Markus Marx

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Abstract

A telescopic crane, includes a substructure, a superstructure rotatably mounted onto the substructure, a counterweight and a telescoping boom structure which includes a main boom slewable about a luffing plane. The main boom has a boom base and at least one telescope section received in the boom base and displaceable between retracted and extended positions. At least one guy support is mounted to the boom structure and connected to a guy rope which extends substantially longitudinally in the direction of the boom structure. The guy support is oriented with respect to the luffing plane at an inclination which is so selected that a lateral load acting on the boom structure is partially or entirely received by the guying.

Claims49

Dependent claims

A telescopic crane, comprising:

a mobile substructure;
a superstructure rotatably mounted on the mobile substructure;
a telescopic boom structure pivotally mounted to the superstructure for angular motion along a luffing plane, wherein the telescopic boom structure includes a base section and at least one telescoping section, and wherein the telescoping section is received in the base section and is displaceable between retracted and extended positions;
at least one rigid guy support having a foot end and a top end, wherein the foot end of the at least one rigid guy support is pivotally attached to the telescopic boom structure;
a tension arrangement including a first tension sub-arrangement and a second tension sub-arrangement, wherein the top end of the at least one rigid guy support is connected via the first tension sub-arrangement to the base section, and wherein the top end of the at least one rigid guy support is further connected via the second tension sub-arrangement to a top end of the boom structure;
and
at least one adjusting device attached to the at least guy one support and the boom structure, the at least one adjusting device positions the at least one guy support in at least one inclined position with respect to the luffing plane of the telescopic boom structure.

4 more elements

A telescopic crane, comprising:

a mobile substructure;
a superstructure rotatably mounted on the mobile substructure;
a telescopic boom structure pivotally mounted to the superstructure for angular motion along a luffing plane, wherein the telescopic boom structure includes a base section and at least one telescoping section, and wherein the telescoping section is received in the base section and is displaceable between retracted and extended positions;
a rigid guy support having a foot end and a top end, wherein the foot end of the rigid guy support is pivotally attached to the telescopic boom structure;
a further rigid guy support having a foot end and a top end, wherein the foot end of the further rigid guy support is pivotally attached to the telescopic boom structure;
a tension arrangement including a first tension sub-arrangement and a second tension sub-arrangement, wherein the top end of the rigid guy support is connected via the first tension sub-arrangement to the base section, wherein the top end of the rigid guy support is further connected via the second tension sub-arrangement to a top end of the boom structure;
a further tension arrangement including a further first tension sub-arrangement and a further second tension sub-arrangement, wherein the top end of the further rigid guy support is connected via the further first tension sub-arrangement to the base section, wherein the top end of the further rigid guy support is further connected via the further second tension sub-arrangement to the top end of the boom structure;
and
an adjusting device attached to the rigid guy support and the boom structure, the adjusting device positioning the guy support in at least one inclined position with respect to the luffing plane of the telescopic boom structure;
a further adjusting device attached to the further guy support and the boom structure, the further adjusting device positioning the further guy support in at least one inclined position with respect to the luffing plane of the telescopic boom structure, wherein the rigid guy support is inclinable to a first side of the luffing plane, and wherein the further rigid guy support is inclinable to a second side of the luffing plane.

7 more elements

A guying device for a boom structure of a crane, comprising:

a first rigid guy support having a foot end and a top end, wherein the foot end of the first rigid guy support is pivotally attachable to the boom structure and inclinable to a first side of a luffing plane of the boom structure, and wherein the top end of the first rigid guy support is couplable with a tension arrangement connected to a top end of the boom structure and a bottom end of the boom structure;
a second rigid guy support having a foot end and a top end, wherein the foot end of the second rigid guy support is pivotally attachable to the boom structure and inclinable to a second side of the luffing plane, and wherein the top end of the second rigid guy support is couplable with a tension arrangement connected to a top end of the boom structure and a bottom end of the boom structure;
a first adjusting device attached to the first guy support and attachable to the boom structure, the first adjusting device positioning the first guy support in at least one inclined position with respect to the first side of the luffing plane;
and
a second adjusting device attached to the second guy support and the boom structure, the second adjusting device positioning the second guy support in at least one inclined position with respect to a second side of the luffing plane.

2 more elements

Dependencies are inferred from the claim text.