The invention relates to a positioning unit (10) and a method for establishing an electrically conductive connection between a stationary charging station and a vehicle, in particular an electric bus or the like, the positioning unit being designed so as to be disposable above a vehicle, an electric charging contact (11) of the positioning unit being movable in relation to a charging contact surface (13) of the vehicle and being contactable therewith by means of the positioning unit, the positioning unit having a positioning device (14) and a drive device (15) for driving the positioning unit, the charging contact being able to be positioned between a contact position for power transmission and a retracted position for power interruption by means of the positioning device. The drive device has a displacement drive (16) having a support means (17) coupled with the positioning unit, a traction force being able to be transmitted in such a manner to the positioning device using the support means (17) that the positioning device is moveable between the contact position and the retracted position by means of the displacement drive.

A non-rail-bound vehicle, in particular a truck, includes a current collector for supplying electric energy from a two-pole overhead conductor. A rocker can be vertically lifted or lowered by a rocking movement of a support extension arm about horizontal tilting axes of lower hinge assemblies and can be laterally displaced by a tilting movement of a support extension arm about vertical pivot axes of the lower hinge assemblies. The lower hinge assemblies are supported on a lifting device which is connected to a vehicle frame of the vehicle and through which the current collector can be vertically moved between a lower parked position and an upper operating position. In this manner, overhead conductors with an extended height range can be contacted without the current collector influencing the entire length of the vehicle.

A non-rail-bound vehicle, in particular a truck, includes a current collector for supplying electric energy from a two-pole overhead conductor. A rocker can be vertically lifted or lowered by a rocking movement of a support extension arm about horizontal tilting axes of lower hinge assemblies and can be laterally displaced by a tilting movement of a support extension arm about vertical pivot axes of the lower hinge assemblies. The lower hinge assemblies are supported on a lifting device which is connected to a vehicle frame of the vehicle and through which the current collector can be vertically moved between a lower parked position and an upper operating position. In this manner, overhead conductors with an extended height range can be contacted without the current collector influencing the entire length of the vehicle.

A haul vehicle includes a dump body, a vehicle body supporting the dump body, a traveling apparatus including driving wheels and supporting the vehicle body, a trolley power receiving apparatus to which power is supplied from a trolley wire, a fuel cell that generates power through electrochemical reaction between hydrogen and oxygen, and an electric motor that generates driving force for rotating the driving wheels on a basis of power from at least one of the trolley wire or the fuel cell.

A haul vehicle includes a dump body, a vehicle body supporting the dump body, a traveling apparatus including driving wheels and supporting the vehicle body, a trolley power receiving apparatus to which power is supplied from a trolley wire, a bidirectional DC/DC converter, a storage battery charged with power supplied from the trolley wire via the bidirectional DC/DC converter, an electric motor that generates driving force for rotating the driving wheels, and a switch mechanism that switches between a first state, in which power is supplied from the trolley wire to the electric motor via the bidirectional DC/DC converter, and a second state, in which power is supplied from the storage battery to the electric motor via the bidirectional DC/DC converter.

A pantograph device of a trolley-type truck includes: a base frame; a bottom frame rockably attached to the base frame; a top frame rockably attached to the vicinity of the top end portion of the bottom frame through a connecting shaft; a collector shoe rockably supported in proximity to the top end portion of the top frame; a hydraulic cylinder for raising and lowering the bottom frame, attached to the base frame; and a spring which acts so as to rotate the top frame upward through the connecting shaft. By erecting the bottom frame by the hydraulic cylinder, the tensile force produced in the spring is increased and the top frame is rotated upward through the connecting shaft. This makes it possible to obtain a wide movable range without use of a long and strong spring and enhance the followability to overhead wires without increasing pressing force.

A pantograph device of a trolley-type truck includes: a base frame; a bottom frame rockably attached to the base frame; a top frame rockably attached to the vicinity of the top end portion of the bottom frame through a connecting shaft; a collector shoe rockably supported in proximity to the top end portion of the top frame; a hydraulic cylinder for raising and lowering the bottom frame, attached to the base frame; and a spring which acts so as to rotate the top frame upward through the connecting shaft. By erecting the bottom frame by the hydraulic cylinder, the tensile force produced in the spring is increased and the top frame is rotated upward through the connecting shaft. This makes it possible to obtain a wide movable range without use of a long and strong spring and enhance the followability to overhead wires without increasing pressing force.

A pantograph includes a chassis, a bow, an articulated arm comprising at least one main rod and at least one auxiliary rod, an aileron assembly comprising at least one aileron which is movable relative to the articulated arm, support means for supporting the movable aileron which are movably mounted on the main rod or the auxiliary rod, means for immobilizing the support means relative to the support rod, and orienting means mounted on the main rod or the auxiliary rod. Over a first range of extension of the articulated arm, the orienting means do not act on the support means such that a characteristic angle of the aileron is substantially constant. Over a second range of extension of the articulated arm, the orienting means act on the support means such that the characteristic angle of the aileron varies continuously.

A pantograph includes a chassis, a bow, an articulated arm comprising at least one main rod and at least one auxiliary rod, an aileron assembly comprising at least one aileron which is movable relative to the articulated arm, support means for supporting the movable aileron which are movably mounted on the main rod or the auxiliary rod, means for immobilizing the support means relative to the support rod, and orienting means mounted on the main rod or the auxiliary rod. Over a first range of extension of the articulated arm, the orienting means do not act on the support means such that a characteristic angle of the aileron is substantially constant. Over a second range of extension of the articulated arm, the orienting means act on the support means such that the characteristic angle of the aileron varies continuously.

A power supply device for a vehicle includes at least one contact head which can be connected to a vehicle and can be brought in contact with a docking station, wherein a contact head roll mechanism is rotatably connected to the at least one contact head and connected so as to be able to be brought in contact with the docking station, where the contact head roll mechanism includes at least two rolls or at least two rollers, via which a rolling contact can be established between the at least one contact head and the docking station, and where a first roll or a first roller is arranged on a first flank of the at least one contact head, and a second roll or a second roller is arranged on a second flank, located across the first flank, of the at least one contact head.