A working vehicle including a work unit hydraulically driven, a hydraulic pump driven by an electric motor, a power source and a power supply circuit which supply electric power to the electric motor, and a main body supporting them, a first fixation mechanism fixing a first fixation component to the main body includes a first conductor, a first conduction member making the first conductor and the main body electrically conductive to each other, and a second conduction member making the first conductor and the first fixation component electrically conductive to each other, and is configured such that the main body and the first fixation component are electrically conductive to each other via the first conductor and the first and second conduction members and are equal in electric potential, and the main body is electrically conductive and equal in electric potential to a ground pole of the power supply circuit.

A working vehicle including a work unit hydraulically driven, a hydraulic pump driven by an electric motor, a power source and a power supply circuit which supply electric power to the electric motor, and a main body supporting them, a first fixation mechanism fixing a first fixation component to the main body includes a first conductor, a first conduction member making the first conductor and the main body electrically conductive to each other, and a second conduction member making the first conductor and the first fixation component electrically conductive to each other, and is configured such that the main body and the first fixation component are electrically conductive to each other via the first conductor and the first and second conduction members and are equal in electric potential, and the main body is electrically conductive and equal in electric potential to a ground pole of the power supply circuit.

A hydraulic system for a working machine, the system comprising: an electric machine connected to a first hydraulic machine and to a second hydraulic machine via a common axle, an output side of the second hydraulic machine being connected to an input side of the first hydraulic machine, wherein the first hydraulic machine is a variable displacement hydraulic machine with unidirectional flow; at least one hydraulic consumer hydraulically coupled to an output side of the first hydraulic machine via a supply line and configured to be powered by the first hydraulic machine; a first return line hydraulically coupling the hydraulic consumer to the input side of the first hydraulic machine.

A hydraulic system for a working machine, the system comprising: an electric machine connected to a first hydraulic machine and to a second hydraulic machine via a common axle, an output side of the second hydraulic machine being connected to an input side of the first hydraulic machine, wherein the first hydraulic machine is a variable displacement hydraulic machine with unidirectional flow; at least one hydraulic consumer hydraulically coupled to an output side of the first hydraulic machine via a supply line and configured to be powered by the first hydraulic machine; a first return line hydraulically coupling the hydraulic consumer to the input side of the first hydraulic machine.

The present disclosure relates to a radial piston hydraulic device distributing flow by pilot operated check valves and an operating method thereof. The radial piston hydraulic device includes a housing, a plurality of piston assemblies, a main shaft, first pilot operated check valves, second pilot operated check valves, and a valve plate. The first pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The second pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The radial piston hydraulic device can be used not only as the hydraulic motor, but also as a hydraulic pump, and can be used in a hydraulic system that need to realize power recovery functions.

The present disclosure relates to a radial piston hydraulic device distributing flow by pilot operated check valves and an operating method thereof. The radial piston hydraulic device includes a housing, a plurality of piston assemblies, a main shaft, first pilot operated check valves, second pilot operated check valves, and a valve plate. The first pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The second pilot operated check valves have a same number as the plurality of piston assemblies and are one-to-one corresponding to the plurality of piston assemblies. The radial piston hydraulic device can be used not only as the hydraulic motor, but also as a hydraulic pump, and can be used in a hydraulic system that need to realize power recovery functions.

Provided is a hydraulic machine including an actuator, a first pump and a second pump configured to supply pressurized fluid to the actuator, a driving motor configured to drive the first and second pumps, a first operator input device through which an operator's desire to operate the actuator is input, and a controller. The controller determines displacements of the first and second pumps corresponding to the operator's desire and a speed of rotation of the driving motor and controls the first pump, the second pump, and the driving motor to operate according to the displacements of the first and second pumps and the speed of rotation of the driving motor finally determined in the determination of the displacements of the first and second pumps.

Provided is a hydraulic machine including an actuator, a first pump and a second pump configured to supply pressurized fluid to the actuator, a driving motor configured to drive the first and second pumps, a first operator input device through which an operator's desire to operate the actuator is input, and a controller. The controller determines displacements of the first and second pumps corresponding to the operator's desire and a speed of rotation of the driving motor and controls the first pump, the second pump, and the driving motor to operate according to the displacements of the first and second pumps and the speed of rotation of the driving motor finally determined in the determination of the displacements of the first and second pumps.

A hydraulic drive unit for a stretcher has a hydraulic circuit with a differential cylinder, a pump, a tank and a valve assembly. The differential cylinder includes a rod working chamber and a piston working chamber. The valve assembly is switchable into at least a first state and a second state, wherein the rod working chamber is connected to the tank in the first state and to the pump in the second state, and wherein the piston working chamber is connected to the pump in the first state and to the tank in the second state. The tank is a tank separated from the atmosphere with a variable tank volume, so that the hydraulic circuit is configured as a closed hydraulic circuit. A stretcher having such a hydraulic drive unit is also provided.

Aspects relate to systems and methods for controlling landing gear of an aircraft. An exemplary system includes a nose gear located at a nose of the aircraft, where the nose gear includes a nose piston configured to allow for displacement of a nose wheel relative the aircraft, a main gear located aft of the nose gear, where the main gear includes a main piston configured to allow for displacement of a main wheel relative the aircraft, a hydraulic circuit in fluidic communication with each of the nose piston and the main piston, and a compliant element in fluidic communication with the hydraulic circuit and configured to provide a compliant response at one or both of the nose piston and the main piston.