Abstract: A method for influencing a cable winch force acting on a cable drive, comprises the method steps providing a cable drive with a drivable winch and with a cable that can be wound on the winch, providing a device for producing a traction sheave cable force on the cable, determining an outer cable force, predetermining a cable drive operating state, providing a control-regulating unit to influence the traction sheave cable force, producing a control-regulating variable by means of the control-regulating unit depending on the outer cable force and the predetermined cable drive operating state, producing the traction sheave cable force by means of the device and influencing the traction sheave cable force by means of the control-regulating unit in such a way that the cable winch force acting on the cable drive can be controlled depending on the respective cable drive operating state and the outer cable force, wherein the device is a traction sheave drive, wherein a four-quadrant operation of the traction sheave dr

Abstract: Device and process for braking rotating and/or slewing gears of work machines comprising at least one dynamic service brake for decelerating a rotating and/or pivotal movement of the rotating and/or slewing gear, and at least one static holding brake (16), by means of which the rotating and/or slewing gear can be locked in one position, wherein at least one sensor (14) is assigned to the dynamic service brake (11a) and/or to the static holding brake (16), said sensor detecting the current movement of the rotating and/or slewing gear, and the sensor (14) being connected to a controller (13, 19) that detects an actuation of the dynamic service brake (11, 11a) said controller actuating the static holding brake (16) when in case of continued rotating and/or pivoting movement of the rotating and/or slewing gear when a dynamic service brake (11a) is still actuated.

Abstract: A system (19; 19, 35) for reducing an amount of a counterweight for a crane comprises a crane (2) having a founding structure (3) being disposed on a base (20), a coupling unit (4), and a superstructure (5) being coupled to the founding structure (3) via the coupling unit (4). The system (19; 19, 35) further comprises a suspension device (21; 21, 36) for suspending the crane (2) at the base (20), said suspension device (21; 21, 36) having a guiding structure (22; 22, 37) defining a guiding direction (23; 23, 38), said guiding structure (22; 22, 37) being attached to the base (20), a displacement device (24) being displaceably attached to the guiding structure (22; 22, 37) along the guiding direction (23; 23, 38), and at least one suspension element (29) being connected with a first end to the crane (2) and being connected with a second end to the displacement device (24).

Abstract: A method for operating a remote control system includes the method steps of providing a remote control system with an operating unit having a display and at least one operating element and with a communication unit having a communication connection to the operating unit, providing a control unit, which has a communication connection to the communication unit, of a work machine, detecting an operating unit actual configuration with a plurality of operating and selection menus by using the operating unit, transmitting the operating unit actual configuration from the operating unit to the control unit, detecting a work machine actual configuration by using the control unit, selecting at least one of the operating and selection menus depending on the work machine actual configuration, transmitting the at least one operating and selection menu to the operating unit and displaying the at least one operating and selection menu on the display.

Abstract: A rotary connection for a work machine, such as a crane, includes a rotational axis, an inner bearing ring, an outer bearing ring and at least three bearing body ring arrangements arranged between the bearing rings with a plurality of respective bearing bodies. At least one of the bearing body ring arrangements is configured to at least partially withstand forces directed in the radial direction to the rotational axis. At least two of the bearing body ring arrangements are configured to at least partially withstand forces directed parallel to the rotational axis and are arranged adjacent to and spaced apart from one another along the rotational axis. The at least two bearing body ring arrangements are configured to at least partially withstand forces directed parallel to the rotational axis in each case establish a direction of action and are arranged spaced apart from one another along the direction of action.

Abstract: A locking and bolting unit for sections telescoping out of a basic element, in particular sections of a telescoping boom of a mobile crane. The invention involves a locking and bolting unit for sections telescoping out of a basic element, in particular sections of a telescoping boom of a mobile crane, comprising two safety bolts (3) arranged displaceably relative to each other, and an interlocking bolt (5) interacting with a grasper (4). Moreover, the safety bolts (3) and an extension of the grasper (4) constructed as a piston rod (5) are positioned together in a lower housing section vertically displaceable in relation to each other and the piston (6) for the piston rod (5) of the grasper (4) is located in an upper housing part (2) placed on a lower housing part (1).

Abstract: Device and process for braking rotating and/or slewing gears of work machines comprising at least one dynamic service brake for decelerating a rotating and/or pivotal movement of the rotating and/or slewing gear, and at least one static holding brake (16), by means of which the rotating and/or slewing gear can be locked in one position, wherein at least one sensor (14) is assigned to the dynamic service brake (11a) and/or to the static holding brake (16), said sensor detecting the current movement of the rotating and/or slewing gear, and the sensor (14) being connected to a controller (13, 19) that detects an actuation of the dynamic service brake (11, 11a) said controller actuating the static holding brake (16) when in case of continued rotating and/or pivoting movement of the rotating and/or slewing gear when a dynamic service brake (11a) is still actuated.

Abstract: A crane, in particular a large crane, including a power consumer system for providing energy, a primary energy source for feeding primary energy into the power consumer system, at least one secondary energy source, independent of the primary energy source, for feeding secondary energy into the power consumer system, at least one energy storage unit arranged locally on the crane and is, in particular, associated with the at least one crane component and connected to the power consumer system for storing primary energy and/or secondary energy, at least one drive motor connected to the power consumer system for operating at least one crane component and a secondary energy source configured such that energy returned from the crane operation is at least partially fed as secondary energy into the power consumer system. The at least one crane component is configured as a secondary energy source for energy recovery.

Abstract: A method for influencing a cable winch force acting on a cable drive, comprises the method steps providing a cable drive with a drivable winch and with a cable that can be wound on the winch, providing a device for producing a traction sheave cable force on the cable, determining an outer cable force, predetermining a cable drive operating state, providing a control-regulating unit to influence the traction sheave cable force, producing a control-regulating variable by means of the control-regulating unit depending on the outer cable force and the predetermined cable drive operating state, producing the traction sheave cable force by means of the device and influencing the traction sheave cable force by means of the control-regulating unit in such a way that the cable winch force acting on the cable drive can be controlled depending on the respective cable drive operating state and the outer cable force, wherein the device is a traction sheave drive, wherein a four-quadrant operation of the traction sheave dr

Abstract: A large mobile crane including an undercarriage. The undercarriage includes a middle section between tracks, wherein a distance between the tracks can be increased or decreased by the insertion or removal of expansion parts. The two tracks are connected on opposite sides of the undercarriage to permit movement of the large mobile crane. The undercarriage also includes a drive unit, a superstructure, one or more control stations, at least two main booms, at least one derrick boom, and at least two lifting devices and counterweights. The counterweights are either arranged separately of or mounted on the undercarriage. The large mobile crane further includes a circular track, and support rollers attached to the superstructure, wherein the support rollers ride on the circular track, and wherein the circular track is an integral part of the expansion parts.

Abstract: A mobile working machine, especially a mobile crane, having an undercarriage (1) and a support device with support cylinders (2) to create the support base required for operation, a top carriage (3) mounted pivotably on the undercarriage (1), as well as an apparatus compatible with the type of the working machine, in particular outriggers (4) and a counterweight arrangement (5). One or more additional hydraulic supports (6) are arranged on the undercarriage (1) underneath or in the proximity of the pivot bearing of the top carriage (3), as well as a control unit (7, 8, 9), which monitors the loads of the support device (2) and controls and monitors the additional supports (6).

Abstract: The object of the invention is to reduce the amount of investment required for the usage-optimized configuration and installation of large cranes. This object is achieved by a large mobile crane having an undercarriage, a drive unit (16), a revolving superstructure (18), one or more control stations (17), at least two jibs (3), at least one counter-jib (4), at least two lifting arrangements (22) and counterweights arranged separately or on the basic structure, characterized in that the load-bearing parts of the crane (3, 4, 20) and the mobility-specific parts (5, 6, 7) are of modular design and can be supplemented by exchangeable and/or supplementary parts, wherein the structural units (modules) used essentially correspond, or are similar, to existing standard-crane components, and an increase in load-bearing capacity can be achieved by arranging a number of these in the large crane.

Abstract: A telescopic unit for telescoping means arranged on machines, comprising at least one telescopic hydraulic cylinder and at least one piston arranged axially movable in the cylinder chamber of the telescopic hydraulic cylinder and connected to a piston rod, the bottom side or the piston rod side of the telescopic hydraulic cylinder being configured fixable to a bearing allocated to the machine, and at least one additional hydraulic system being allocated to the free end of the telescopic unit.

Abstract: A system (19; 19, 35) for reducing an amount of a counterweight for a crane comprises a crane (2) having a founding structure (3) being disposed on a base (20), a coupling unit (4), and a superstructure (5) being coupled to the founding structure (3) via the coupling unit (4). The system (19; 19, 35) further comprises a suspension device (21; 21, 36) for suspending the crane (2) at the base (20), said suspension device (21; 21, 36) having a guiding structure (22; 22, 37) defining a guiding direction (23; 23, 38), said guiding structure (22; 22, 37) being attached to the base (20), a displacement device (24) being displaceably attached to the guiding structure (22; 22, 37) along the guiding direction (23; 23, 38), and at least one suspension element (29) being connected with a first end to the crane (2) and being connected with a second end to the displacement device (24).

Abstract: Method for adjusting the angle of a jib system of a crane, comprising the steps of providing two jib units of the jib system, which can be variably arranged with respect to their longitudinal axes in an angle position in relation to one another, arranging connecting links attached to the jib units in such a way that the longitudinal axes of the jib units are parallel in a starting angle position, starting openings and target openings of the connecting links are aligned with one another pairwise to insert a connecting element connecting the jib units, the aligned starting openings being connected with the connecting element, relieving the connecting element connecting the aligned starting openings, removing the first connecting element, connecting a pair of the aligned target openings with the connecting element, and arranging the jib units in a target angle position which is different from the starting angle position.

Abstract: The invention relates to a crawler crane comprising two crawler supports (9) with rotating crawlers (8). Both crawler supports (9) are connected by a transversal bridge (10). A superstructure (3) of the crawler crane comprises at least one crane jib that can pivot about a vertical axis and is connected to the transversal bridge (10). A pivotable articulation connects the transversal bridge (19) in a pivotable manner to the crane superstructure (3). At least one of the crawler supports (9) is connected to the transversal bridge (10) by means of a double link (11). A lower link (12) of the double link (11) is articulated on the crawler support (9) by means of a crawler support lower pivotable axis (13) and on the transversal bridge (10) by means of a transversal bridge lower pivotable axis (14).

Abstract: A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.

Abstract: An element is provided for connecting the chords of a lattice system, which consists of upper chords and lower chords, between which struts and/or stays are arranged, to a telescopic boom head. Thereby, the lower chords are directly connected to the telescopic boom head by means of bolts, while the upper chords can be connected to the telescopic boom head by a connecting element of variable length in such a way that—with respect to the connection of the lower chords—the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.