The present disclosure concerns a crane, in particular a tower crane, with a jib from which a load hook can be raised and lowered via a hoisting cable, and with an electric power supply to the load hook and/or to a trolley that may be movable along the crane jib. According to the disclosure, the electric power supply to the load hook and/or to the trolley is at least partly conducted by a running cable which transmits tractive forces for the crane operation.

The present disclosure concerns a crane, in particular a tower crane, with a jib from which a load hook can be raised and lowered via a hoisting cable, and with an electric power supply to the load hook and/or to a trolley that may be movable along the crane jib. According to the disclosure, the electric power supply to the load hook and/or to the trolley is at least partly conducted by a running cable which transmits tractive forces for the crane operation.

An electric motorization system includes a motorized unit equipped with a motor provided with a rotor and stator assembly including several coils, and a frequency converter which is electrically powered by a power supply. The frequency converter is controlled by a monitoring/control unit for turning on the motor in a variable speed operating mode, or for turning off the motor. The electric motorization also includes a measurement system suitable for measuring at least one condensation parameter which is representative of a condensation of the water contained in an ambient air, and the monitoring/control unit is configured to, depending on said condensation parameter, control the frequency converter during the turning off of the motor so that a preheating electric current flows through the coils to activate a preheating of the motor when it is turned off.

Disclosed is a machine having a front frame and a rear frame connected by a hydraulic powered articulated steering, and mechanism for 360? rotation of a digger, a dumper, a jack and a cab. The machine is used for moving objects such as stones, cut stone or agricultural products such as bales of hay, and depositing them at another location which has a front frame and a rear frame connected by a hydraulic joint. The hydraulic joint is able to steer the machine and also move the front frame and the rear frame to move substantially smoothly over a rough or uneven terrain.

An anti-electromagnetic interference telescopic boom and a crane. The telescopic boom includes a first anti-interference module, a second anti-interference module and a cable drum; wherein the first anti-interference module, the second anti-interference module and the cable drum are all arranged on a telescopic boom of the crane, the first anti-interference module is connected to a first end of the cable drum, and the second anti-interference module is connected to a second end of the cable drum, the cable drum is configured to transmit a control signal and a power signal for a control system of the telescopic boom, the first anti-interference module is configured to filter and encrypt the control signal and the power signal, and the second anti-interference module is configured to re-filter, decrypt and amplify the control signal and the power signal.

An anti-electromagnetic interference telescopic boom and a crane. The telescopic boom includes a first anti-interference module, a second anti-interference module and a cable drum; wherein the first anti-interference module, the second anti-interference module and the cable drum are all arranged on a telescopic boom of the crane, the first anti-interference module is connected to a first end of the cable drum, and the second anti-interference module is connected to a second end of the cable drum, the cable drum is configured to transmit a control signal and a power signal for a control system of the telescopic boom, the first anti-interference module is configured to filter and encrypt the control signal and the power signal, and the second anti-interference module is configured to re-filter, decrypt and amplify the control signal and the power signal.

The invention relates to an apparatus for the energy-optimized hydraulic control of at least one double-action working cylinder of a work machine comprising a hydraulic pressure transducer which is hydraulically connected to a first piston surface of the working cylinder, to a second piston surface of the working cylinder and to at least one pressure accumulator, wherein the pressure transducer is configured such that the hydraulic energy of a high-pressure volume flow conveyed by the first piston surface to the pressure transducer can be stored completely or at least partially by the at least one connected pressure accumulator and such that the cylinder chamber of the second piston surface of the working cylinder can be filled with a low-pressure volume flow by the pressure transducer.

The invention relates to an apparatus for the energy-optimized hydraulic control of at least one double-action working cylinder of a work machine comprising a hydraulic pressure transducer which is hydraulically connected to a first piston surface of the working cylinder, to a second piston surface of the working cylinder and to at least one pressure accumulator, wherein the pressure transducer is configured such that the hydraulic energy of a high-pressure volume flow conveyed by the first piston surface to the pressure transducer can be stored completely or at least partially by the at least one connected pressure accumulator and such that the cylinder chamber of the second piston surface of the working cylinder can be filled with a low-pressure volume flow by the pressure transducer.

Coupling unit for coupling a freely movable device into an energy chain system which is connected to a coupling carriage that is movable parallel to the displacement path of the device, wherein the coupling unit has a first plug part which is able to be connected to the device in a flexible and tension-resistant manner and which is able to be connected to a second plug part arranged on the coupling carriage, wherein the coupling unit is able to be extended in the direction of the coupling carriage, wherein the coupling carriage has a guide unit by way of which a vertically displaceable strut arranged on the device is able to be raised with the first plug part, and wherein, when the coupling carriage stops in a predetermined position relative to the device the strut drops into a receptacle of the coupling carriage and surrounds the latter, wherein the two plug parts are positioned horizontally and vertically with respect to one another.

Coupling unit for coupling a freely movable device into an energy chain system which is connected to a coupling carriage that is movable parallel to the displacement path of the device, wherein the coupling unit has a first plug part which is able to be connected to the device in a flexible and tension-resistant manner and which is able to be connected to a second plug part arranged on the coupling carriage, wherein the coupling unit is able to be extended in the direction of the coupling carriage, wherein the coupling carriage has a guide unit by way of which a vertically displaceable strut arranged on the device is able to be raised with the first plug part, and wherein, when the coupling carriage stops in a predetermined position relative to the device the strut drops into a receptacle of the coupling carriage and surrounds the latter, wherein the two plug parts are positioned horizontally and vertically with respect to one another.