LIEBHERR-WERK EHINGEN GMBH

The disclosure relates to an access device for a working apparatus, more particularly for a mobile crane, comprising a cheek, at least two steps which are laterally and vertically offset with respect to one another and are each supported on the cheek pivotably about a vertical first rotational axis, and a guide bar which connects the steps to one another. The guide bar is pivotably connected, at the end of the step opposite the cheek, to each step via a connection element such that the steps can be jointly moved about their first rotational axes from an access position, in which the steps project laterally from the cheek and in which the access device can be walked on, to a transport position, in which the steps rest against the cheek in a space-saving manner, and vice versa. The disclosure further relates to a working apparatus, more particularly a mobile crane.

The disclosure relates to a deflection device for a cable, comprising a pulley mounting for carrying at least one cable deflection pulley, at least one cable deflection pulley, which is mounted on the pulley mounting so as to be rotatable about a pulley rotational axis, and a cable securing arrangement for securing a correct reeving of a cable on the cable deflection pulley, characterised in that the cable securing arrangement is pivotable relative to the pulley mounting about a pivot axis, in order to switch between a securing position, in which a cable deflected by the cable deflection pulley is secured in the cable deflection pulley, and a release position, in which a cable deflected by the cable deflection pulley is not secured in the cable deflection pulley, wherein the pivot axis extends in parallel with the pulley rotational axis.

The present disclosure relates to a method for controlling a first guying force in a first guying between a boom of a mobile crane and a superstructure of the mobile crane, the first guying force being automatically controlled by setting a second guying force in a second guying between the boom of the crane and a component of the crane.

The disclosure relates to a deflection device for deflecting a rope, comprising a roller holder, at least one deflection roller mounted on the roller holder so as to be rotatable about a roller axis of rotation, and a rope securing member spaced radially from the deflection roller for securing the rope to the deflection roller. According to the disclosure, the rope securing member is mounted so that it can be displaced along a displacement direction, wherein the deflection device comprises a detection device by means of which a displacement of the rope securing member along the displacement direction can be detected. The disclosure also relates to a working machine, in particular a crane, comprising a deflection device according to the disclosure, wherein the working machine comprises a boom with a boom head which comprises at least one deflection device over which a rope is guided.

The invention relates to a mobile crane having a telescopic boom that is luffably coupled to a superstructure and that comprises a coupling section and at least one telescopic section supported therein in a retractable and extendable manner. At least one guying support is fastened to the coupling section and is connected to the coupling section or to the superstructure via a first guying and to a connection piece at a telescopic section via a second guying. In accordance with the invention, the second guying comprises at least two guying elements coupled with one another. The second guying is thereby adjustable in length and is thus adaptable to the extension length of the telescopic boom such that at least one of the mutually coupled guying elements is directly releasably connectable to the guying support. The invention further relates to a guying system for a mobile crane in accordance with the invention, to a method of moving a mobile crane in accordance with the invention into a guyed work position, and to a method of varying the extension length of the guyed telescopic boom of a mobile crane in accordance with the invention.

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.

The invention relates to a longitudinally divisible lattice piece for a lattice boom, comprising two detachably connectable lattice piece parts that can be detached from one another for transport and pushed into one another transversely to the longitudinal direction, wherein each of the lattice piece parts comprises two corner posts extending in the longitudinal direction, which are firmly connected to one another via a plurality of diagonal and vertical bars and together with these define a side surface of the lattice piece, and at least two cross-connecting structures firmly connected to the corner posts, wherein the lattice piece parts can be detachably connected via connection means arranged on the cross-connecting structures.

The disclosure relates to a mobile crane that comprises a travelable undercarriage, a superstructure rotatably supported on the undercarriage, and a counterweight device couplable to the superstructure. The counterweight device comprises a counterweight base plate and at least one connection means for raising the counterweight device and for coupling it to the superstructure. The disclosure furthermore relates to a counterweight device for a mobile crane in accordance with the disclosure.

The invention relates to an auxiliary tip for detachable mounting on a boom of a work machine, in particular a mobile crane. The auxiliary tip comprises first connecting elements for establishing a first connection with a first boom part, and second connecting elements for establishing a second connection with the first boom part. In order to be able to connect the auxiliary tip to a second boom part having a system dimension different from the first boom part, the auxiliary tip according to the invention comprises third connecting elements with which a second connection to a second boom part can be established instead of the second connecting elements. While the auxiliary tip is connected to the first boom part via the first and second connecting elements, the auxiliary tip can be releasably connected to a second boom part via the third connecting elements.

The invention relates to a system for the manual insertion/extraction of bolts for connecting/disconnecting components of a working machine, comprising a bolt extractor, which comprises a displaceable bolt and a rod connected to the bolt or formed in one piece with a bearing element for manual movement of the bolt, as well as a counter-bearing element arranged on one of the components, wherein the bearing element and the counter-bearing element are designed as force application points for receiving a lever element and are arranged such that the rod can be displaced with the bolt by manual application of force to the lever element received in the bearing and counter-bearing elements, thereby enabling the components to be connected/disconnected. The invention also relates to a bolt extractor for a system according to the invention, a component, with a counter bearing and a bolt extractor as well as a working machine, with such a lattice piece.