A method for controlling a scissor stabiliser of self-propelled operating machines that includes a pair of rotatable telescopic stabilising arms and each arm includes a first segment rotatable between a raised position and an operating position; a second segment, slidable relative to the first segment and provided with a foot for contact with the ground; wherein the stabiliser can be activated between an active configuration and an inactive configuration. The stabilisers are brought from the active configuration to the inactive configuration by movements which include a synchronous phase in which they actuate simultaneously in at least one stretch of the rotation of the first segments, in the sense that it moves from the operating position to the raised position and at least one stretch of the sliding of the second segments, in the direction from the extended position to the closed position.

A computer-controlled mobile crane is disclosed herein, comprising a column which is rotatable around its vertical axis, a hydraulically actuated primary arm, a hydraulically actuated secondary arm, and an attachment point to which a gripping assembly is attached. The components are actuated by a hydraulic control unit controlled by a computer control unit and corresponding software that generates an internal coordinate system on the basis sensors mounted on the crane and an optical measuring unit. The crane is capable of automatically using the gripping assembly to transport a load from an initial point to an end point where the load should be deposited while avoiding one or more obstacles in the path of travel of the gripping assembly and the load.

A computer-controlled mobile crane is disclosed herein, comprising a column which is rotatable around its vertical axis, a hydraulically actuated primary arm, a hydraulically actuated secondary arm, and an attachment point to which a gripping assembly is attached. The components are actuated by a hydraulic control unit controlled by a computer control unit and corresponding software that generates an internal coordinate system on the basis sensors mounted on the crane and an optical measuring unit. The crane is capable of automatically using the gripping assembly to transport a load from an initial point to an end point where the load should be deposited while avoiding one or more obstacles in the path of travel of the gripping assembly and the load.

A stabilized machine including a self-propelled base frame movably supported by a motorized ground support arrangement, a motorized turntable rotatably supported on top of the support plane of the base frame, an elevating arm articulated to the turntable and at a free end adapted to be fixed to an operating arrangement, stabilizers each rotatably associated with the base frame about an axis of oscillation lying on a plane orthogonal to the axis of rotation of the turntable, alternatively between a working position supported on the ground in addition to or as an alternative to the support arrangement, and a rest position that is raised off the ground, and control system comprising sensors, one for each of the stabilizers. Each sensor is configured to detect a first parameter indicative of an inclination of the respective stabilizer about its axis of rotation, and an electronic control unit operatively coupled to the sensors.

A stabilized machine including a self-propelled base frame movably supported by a motorized ground support arrangement, a motorized turntable rotatably supported on top of the support plane of the base frame, an elevating arm articulated to the turntable and at a free end adapted to be fixed to an operating arrangement, stabilizers each rotatably associated with the base frame about an axis of oscillation lying on a plane orthogonal to the axis of rotation of the turntable, alternatively between a working position supported on the ground in addition to or as an alternative to the support arrangement, and a rest position that is raised off the ground, and control system comprising sensors, one for each of the stabilizers. Each sensor is configured to detect a first parameter indicative of an inclination of the respective stabilizer about its axis of rotation, and an electronic control unit operatively coupled to the sensors.

A method of adjusting a first plane of a work machine comprising first, second, third and fourth adjustable stabilisers that are each extendable between a minimum extension and a maximum extension. A difference in length between the minimum extension and the maximum extension is the same for each adjustable stabiliser. The first, second, third and fourth adjustable stabilisers are configured to support the work machine when a distal end of each adjustable stabiliser is in contact with a ground surface. A first stabiliser pair comprises the first adjustable stabiliser and the second adjustable stabiliser. A second stabiliser pair comprises the second adjustable stabiliser and the third adjustable stabiliser. The method comprises: a. extending the first, second, third and fourth adjustable stabilisers to a first configuration, wherein in the first configuration each adjustable stabiliser is at a calibration extension and the first plane is parallel to a reference plane defined by points of contact of the distal ends of the first, second, third and fourth adjustable stabilisers with the ground surface; b. adjusting the first stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a second configuration, wherein in the second configuration: either the tilt sensor indicates that the first plane is parallel to a first axis of a target plane; or the first adjustable stabiliser and the second adjustable stabiliser have reached the maximum extension; c. adjusting the second stabiliser pair such that the first, second, third and fourth adjustable stabilisers arrive at a third configuration, wherein in the third configuration: either the tilt sensor indicates that the first plane is parallel to a second axis of the target plane; or the second adjustable stabiliser and the third adjustable stabiliser have reached maximum extension.

An elongated boom of a heavy-lift machine is pivotably mounted at a pivot mount with the load carried by the free end of the boom, pivoted by a primary actuator connected to a drive end of the boom. A counterbalance component is engaged to the boom to counterbalance the weight-generated torque of the boom. The counterbalance component includes a hydraulic actuator with the piston connected to the boom and a liquid-filled cylinder connected to a gas-filled accumulator in a hydraulic circuit. The gas pressure in the accumulator is adjustable by the fluid provided to the hydraulic actuator. The piston of the counterbalance component applies a counterbalance force to the boom as a function of the pressure of the gas compressed in the accumulator

An elongated boom of a heavy-lift machine is pivotably mounted at a pivot mount with the load carried by the free end of the boom, pivoted by a primary actuator connected to a drive end of the boom. A counterbalance component is engaged to the boom to counterbalance the weight-generated torque of the boom. The counterbalance component includes a hydraulic actuator with the piston connected to the boom and a liquid-filled cylinder connected to a gas-filled accumulator in a hydraulic circuit. The gas pressure in the accumulator is adjustable by the fluid provided to the hydraulic actuator. The piston of the counterbalance component applies a counterbalance force to the boom as a function of the pressure of the gas compressed in the accumulator

A mobile crane having a main jib that can be raised and lowered but not telescoped by means of at least one main tensile connector, and a counter jib, where the main tensile connector extends between a first connection point in the region of a head of the main jib and a second connection point in the region of a head of the counter jib, a first secondary tensile connector and a second secondary tensile connector are arranged between the main tensile connector and the main jib, and the first secondary tensile connector has a fixed length. In order to further reduce the loads acting upon the main jib, such as during raising and lowering, and to increase its overall bearing load, at least portions of the second secondary tensile connector can be varied in length.

A mobile crane having a main jib that can be raised and lowered but not telescoped by means of at least one main tensile connector, and a counter jib, where the main tensile connector extends between a first connection point in the region of a head of the main jib and a second connection point in the region of a head of the counter jib, a first secondary tensile connector and a second secondary tensile connector are arranged between the main tensile connector and the main jib, and the first secondary tensile connector has a fixed length. In order to further reduce the loads acting upon the main jib, such as during raising and lowering, and to increase its overall bearing load, at least portions of the second secondary tensile connector can be varied in length.