A crane, in particular a loading crane, includes an arm system that has a plurality of arms. The crane also has a crane controller that is configured, in a coordinate control operating mode, to control the coordinates of the arm system. The crane controller has a user interface, and the user interface has at least one function which can be selected by a user and by way of which at least one of the degrees of freedom of the arm system can be restricted or is restricted in the coordinate control operating mode.

In a power supply system comprising an electric generator, a DC intermediate circuit, at least one rechargeable electrical energy storage, which is connected to the DC intermediate circuit, a rectifier via which the electrical generator is connectable to the DC intermediate circuit, and at least a first inverter, the DC side of which is supplied with direct current from the DC intermediate circuit and the AC side of which is connectable to an electrical load, and further comprising a control device which regulates the generator in dependence on the load of the electrical load, it is provided that the control device is designed to switch between a first and a second operating mode of the power supply system, wherein in the first operating mode the electrical energy generated by the electrical generator is supplied via the rectifier to the DC intermediate circuit, and in the second operating mode the generator is connected to the load in parallel with the inverter.

A crane, in particular a loading crane, includes an arm system that has a plurality of arms. The crane also has a crane controller that is configured, in a coordinate control operating mode, to control the coordinates of the arm system. The crane controller has a user interface, and the user interface has at least one function which can be selected by a user and by way of which at least one of the degrees of freedom of the arm system can be restricted or is restricted in the coordinate control operating mode.

A crane includes a crane main body, a boom, a jib, a boom driving unit, a jib driving unit, a manipulation unit, a drive control unit, a suspension device, a determination unit, and an operation regulating unit. The determination unit determines whether a jib boom angle condition is established or not. The operation regulating unit allows the crane to change a posture between a fall posture and a work posture according to a determination result of the determination unit.

A crane that controls an actuator on the basis of a target speed signal Vd of cargo W includes: a control device having a feedback control unit that calculates a target path signal Pdα of the cargo from the target speed signal Vd by integration to correct the target path signal Pdα on the basis of the differential of current position coordinates p(n) of the cargo W corresponding to the target path signal Pdα; and a feedforward control unit that adjusts a weight coefficient of a transfer function G(s) expressing the characteristics of the crane on the basis of a target path signal Pd1α that has been corrected. The target path signal Pd1α corrected by the feedback control unit is corrected using the transfer function G(s) for which the weight coefficient has been adjusted by the feedforward control unit.

A crane includes a crane main body, a boom, a jib, a boom driving unit, a jib driving unit, a manipulation unit, a drive control unit, a suspension device, a determination unit, and an operation regulating unit. The determination unit determines whether a jib boom angle condition is established or not. The operation regulating unit allows the crane to change a posture between a fall posture and a work posture according to a determination result of the determination unit.

To suppress rotation of a cylinder rod relative to a cylinder body while avoiding interference of a weight cylinder connecting a distal end of a mast to a weight guy line with other members in assembling and disassembling. The crane includes a pair of right and left weight cylinders having a cylinder body and a cylinder rod, and a pair of right and left mast cylinder connecting portions. The pair of right and left mast cylinder connecting portions regulate the rotation of the cylinder rod and connect the right and left both side parts of the mast and the pair of right and left cylinder rods to each other.

A crawler crane includes a lower traveling body, and the lower traveling body includes: a car body; a right crawler device and a left crawler device; a front side connecting portion; and a rear side connecting portion, the right crawler device includes a right crawler frame, the left crawler device includes a left crawler frame, the front side connecting portion is separably joined to each of a front end portion of the car body, the right crawler frame front portion and the left crawler frame front portion, the rear side connecting portion is separably joined to each of a rear end portion of the car body, the right crawler frame rear portion and the left crawler frame rear portion, and each of the front side connecting portion and the rear side connecting portion includes a lattice portion which has a lattice structure.

A crane that controls an actuator on the basis of a target speed signal Vd of cargo W includes: a control device having a feedback control unit that calculates a target path signal Pd of the cargo from the target speed signal Vd by integration to correct the target path signal Pd on the basis of the differential of current position coordinates p(n) of the cargo W corresponding to the target path signal Pd; and a feedforward control unit that adjusts a weight coefficient of a transfer function G(s) expressing the characteristics of the crane on the basis of a target path signal Pd1 that has been corrected. The target path signal Pd1 corrected by the feedback control unit is corrected using the transfer function G(s) for which the weight coefficient has been adjusted by the feedforward control unit.

In a power supply system comprising an electric generator, a DC intermediate circuit, at least one rechargeable electrical energy storage, which is connected to the DC intermediate circuit, a rectifier via which the electrical generator is connectable to the DC intermediate circuit, and at least a first inverter, the DC side of which is supplied with direct current from the DC intermediate circuit and the AC side of which is connectable to an electrical load, and further comprising a control device which regulates the generator in dependence on the load of the electrical load, it is provided that the control device is designed to switch between a first and a second operating mode of the power supply system, wherein in the first operating mode the electrical energy generated by the electrical generator is supplied via the rectifier to the DC intermediate circuit, and in the second operating mode the generator is connected to the load in parallel with the inverter.