A lifting unit includes a jib foot forming a proximal part of a jib in a service configuration, a counter jib supporting a balancing ballast, a securing part between the jib foot and the counter jib to secure the lifting unit to a mast, and a cylinder connected to the jib foot such that the jib foot is movable between a lowered position and a lifted position. A second cylinder is connected to the securing part.

A crane support system includes two spaced apart longitudinal members couplable with a vehicle frame. Two spaced apart groups of tubes are coupled with and extend between the longitudinal members and outboard relative to one member to define an outboard subassembly portion. A tower frame is mounted atop the outboard subassembly portion. A first brace extends angularly between the groups of tubes, the brace extending from a one of the groups forward relative to the vehicle frame toward the other group aft relative to the vehicle frame and toward the tower frame. A horizontal arm extends transversely beneath the outboard subassembly portion. A vertical support has a top end coupled with the arm and a bottom end couplable with an outrigger. A second brace extends angularly between the vertical support and the arm for transferring bending moment and/or shear from the cantilever to the outrigger via the vertical support.

A mobile crane has an undercarriage, a superstructure arranged on the undercarriage, a slewing gear by which the superstructure may be rotated relative to the undercarriage, a slewing gear brake that acts on the slewing gear to brake a rotation of the superstructure, and a jib mounted on the superstructure as to be adjustable in luffing angle and/or in length. The mobile crane additionally contains a dolly coupling arranged on the jib and by which the jib is coupled to a mobile crane dolly during dolly travel with the superstructure in an extended position. The mobile crane further has a sensor interface for connecting a dolly coupling sensor, and a controller that is adapted to ascertain during dolly travel, in dependence on a signal received from the dolly coupling sensor, whether the jib rests on the mobile crane doll, and to activate the slewing gear brake if it does not.

A mobile crane has an undercarriage, a superstructure arranged on the undercarriage, a slewing gear by which the superstructure may be rotated relative to the undercarriage, a slewing gear brake that acts on the slewing gear to brake a rotation of the superstructure, and a jib mounted on the superstructure as to be adjustable in luffing angle and/or in length. The mobile crane additionally contains a dolly coupling arranged on the jib and by which the jib is coupled to a mobile crane dolly during dolly travel with the superstructure in an extended position. The mobile crane further has a sensor interface for connecting a dolly coupling sensor, and a controller that is adapted to ascertain during dolly travel, in dependence on a signal received from the dolly coupling sensor, whether the jib rests on the mobile crane doll, and to activate the slewing gear brake if it does not.

Lifting performance of a work machine is increased while suppressing an increase in a vehicle weight. When a slewing frame is seen from a side, a first reinforcement member is provided from a boom foot section to a front side part of a slewing bearing, a second reinforcement member is provided from the boom foot section to a mast foot section, and a third reinforcement member is provided from the mast foot section to a rear side part of the slewing bearing. Furthermore, a fourth reinforcement member is provided from a middle region (M) located at an upper end portion of the slewing frame and above a rear portion of the slewing bearing to the front side part of the slewing bearing, and a fifth reinforcement member is provided from the middle region (M) to the rear side part of the slewing bearing.

Lifting performance of a work machine is increased while suppressing an increase in a vehicle weight. When a slewing frame is seen from a side, a first reinforcement member is provided from a boom foot section to a front side part of a slewing bearing, a second reinforcement member is provided from the boom foot section to a mast foot section, and a third reinforcement member is provided from the mast foot section to a rear side part of the slewing bearing. Furthermore, a fourth reinforcement member is provided from a middle region (M) located at an upper end portion of the slewing frame and above a rear portion of the slewing bearing to the front side part of the slewing bearing, and a fifth reinforcement member is provided from the middle region (M) to the rear side part of the slewing bearing.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

A crane having at least one jib system, a sensor unit for detecting a deformation of the jib system transversely to a load plane, and to an activatable adjustment unit for influencing the deformation of the jib system transversely to the load plane.

A crane having at least one jib system, a sensor unit for detecting a deformation of the jib system transversely to a load plane, and to an activatable adjustment unit for influencing the deformation of the jib system transversely to the load plane.