A large manipulator includes a chassis, a mast pedestal, an articulated mast, and a control unit. The mast pedestal is rotatable around a vertical axis by means of a rotary drive and arranged on the chassis. The articulated mast includes two or more mast arms pivotally-movably connected, via articulated joints, with the respectively adjacent mast pedestal or other mast arm by a pivot drive. The control unit is configured to actuate the pivot drive and/or the rotary drive to move the articulated mast with a control sequence from an initial position of the articulated mast, autonomously, into a pre-specified target position of the articulated mast.

A large manipulator for concrete pumps a distributor boom that includes an articulated boom mounted on the boom pedestal and formed by multiple articulating boom arms with multiple joints for pivoting the boom arms with respect to the boom pedestal or an adjacent boom arm. A control device controls the movement of the articulated boom with the aid of drive unit actuating elements associated with the articulated joints. A device determines the vertical speed v.sub. and/or horizontal speed v of a location on at least one boom arm in a coordinate system referenced to the frame. A device is also provided for determining the articulating angles of the joints. The control device controls the movement of the articulated boom by providing positioning control variables SD.sub.i for the actuating elements of the drive units, which positioning control variables depend on the determined vertical speed v.sub. and/or horizontal speed v of the boom arm location, and on the determined articulating angles .sub.i of the joints, and/or on an angle of rotation .sub.18 of the boom pedestal about a vertical axis, and on control signals S for adjusting the distributor boom generated by a controller that can be operated by a boom operator.

The invention related to a concrete-pump boom-arm segment having an upper chord (33), a lower chord (34) and two lateral parts (35, 36) which connect the upper chord (33) and the lower chord (34). The boom-arm segment comprises a longitudinal connection (44) between two subregions (41, 42) of the boom-arm segment which adjoin one another in the longitudinal direction, wherein the longitudinal connection (44) extends over a chord portion (56, 66) and over a lateral part portion (53, 63). The lateral part portion (53, 63) is bent over with respect to the chord portion (56, 66) in the first subregion (41) and in the second subregion (42). The material thickness of the chord portion (56) is greater in the first subregion (41) than the material thickness of the chord portion (66) in the second subregion (42). The invention additionally relates to a method for producing such a boom-arm segment. Such a boom-arm segment is well suited for absorbing static and dynamic loads and can be produced in a cost-effective manner.

A mobile operating machine comprising a motor vehicle provided with at least one internal combustion motor which cooperates with a movement unit to move said motor vehicle, an articulated arm able to deliver concrete and a pumping unit configured to pump the concrete from said drum to said articulated arm. At least one of either the articulated arm or the pumping unit is connected to a respective hydraulic pump configured to pump a working fluid and determine the drive of said articulated arm and/or respectively said pumping unit. The mobile operating machine also comprises at least one electromechanical machine connected to said internal combustion motor, to said hydraulic pump, and to an electric accumulator.

A manipulator for concrete pumps having an articulated boom with at least two boom arms and a hydraulic drive that pivots one or more of the boom arms. A hydraulic cylinder has piston and rod side working volumes. A hydraulic circuit has a first switching state in which the hydraulic circuit connects a first working port for feed or discharge of hydraulic fluid to the rod-side working volume and connects a second working port for feed or discharge of hydraulic fluid to the piston-side working volume. In a second switching state, the hydraulic circuit separates the first working port from the first fluid channel and thereby connects the first fluid channel to the second fluid channel for the feed of hydraulic fluid from the rod-side to the piston side working volume. A sensor acquires an operating state variable based upon which an activation assembly sets the switching state.

An engineering machinery includes a cab, a vehicle body located behind the cab, a rotating platform provided on the vehicle body, and multiple-sectional booms articulated in sequence, wherein a centerline of gyration of the rotating platform is located in a middle of the vehicle body, a first sectional boom is articulated with the rotating platform, and the first sectional boom extends from the rotating platform toward a rear end of the vehicle body, a second sectional boom is articulated with the first sectional boom and folded above the first sectional boom, the first sectional boom to a fourth sectional boom are folded into an R shape, a projection of a third sectional boom at least partially overlaps a projection of the cab on a vertical projection plane perpendicular to a length direction of the vehicle body.

Construction systems for constructing a structure on a foundation and methods relating thereto are disclosed. In an embodiment, the construction system includes a rail assembly configured to be mounted to the foundation. In addition, the construction system includes a gantry movably disposed on the rail assembly configured to translate along a first axis relative to the rail assembly. Further, the construction system includes a printing assembly movably disposed on the gantry and configured to translate along a second axis relative to the gantry. The second axis is orthogonal to the first axis. The printing assembly is configured to deposit vertically stacked layers of an extrudable building material on the foundation to construct the structure. The gantry has a width along the second axis that is configured to be adjusted relative to the foundation.

A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), and first and second control valves (700, 800). A net load (90) is supported by a first chamber (116, 118) of the hydraulic cylinder, and a second chamber (118, 116) of the hydraulic cylinder may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first control valve may apply a holding pressure and thereby hold the first counter-balance valve closed and the second counter-balance valve open.

A collapsible, versatile, multiple axis Cartesian robot system is aimed directly at solving the issue of the inverse relationship of robot portability to workspace volume. The collapsible, multiple axis Cartesian robot, minimizes the collapsed size of the robot while maximizing the workspace volume in the use of multiple, alternating linear and rotary actuators.

A distribution boom for a concrete pump comprises at least a first and a second boom arm, wherein the first and the second boom arm are connected to one another via a joint and are pivotable relative to one another via the joint about a pivot axis, and a concrete delivery line is provided along the boom arms. The joint connects the first and the second boom arm offset to one another so that the load-bearing structures of each of the two boom arms intersect a separating plane running perpendicular to the pivot axis between the first and the second boom arm only in the joint, wherein a hydraulic cylinder is arranged on one boom arm and connected to the other boom arm via coupling rods so that the two boom arms can be pivoted relative to one another by the hydraulic cylinder about the pivot axis of the joint.