A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.

A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.

A lifting magnet including a plurality of electromagnetic coils that are disposed in a nesting arrangement and capable of being independently ON/OFF-controlled and voltage-controlled. By using the plurality of electromagnetic coils in a selective or appropriately combined manner, the lifting magnet secures a sufficient magnetic flux penetration depth during conveyance of steel plates, and can easily and highly precisely control the magnetic flux penetration depth in accordance with the number of steel plates to be lifted.

A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.

A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.

A lifter with electro-permanent magnets is provided. It has an external bearing structure closed at the bottom by a plate, provided with a heat shield, and pole pieces secured under the respective poles and protruding from the bottom plate. Each of the electro-permanent magnets has a reversible magnet arranged on top of one of the poles, of a fixed polarization magnet formed by a plurality of blocks placed along the lateral faces of the pole and of a coil arranged around the reversible magnet to cause the reversal of the polarization of the latter by means of an electrical pulse. An airtight air gap between 1 and 4 mm high is formed between each pole piece and the respective pole through the interposition of a plate of thermal insulation material that resists high temperatures provided at each pole with a rectangular window slightly smaller in size than the pole itself, with the top sides of the pole pieces and/or the bottom sides of the poles being provided with peripheral recesses suitable to act as seats for the positioning of the plate.

An output shaft of a hydraulic motor is enclosed within a sealed housing and coupled to an input shaft of an electric generator using non-contact couplings. Tool electrical components are electrically coupled to the electric generator. A high pressure hydraulic tool circuit includes a hydraulic tool load and the hydraulic motor of the electric power generation assembly coupleable between a hydraulic boom inlet line and a hydraulic boom return line. Both the hydraulic tool load and the hydraulic motor of the electric power generation assembly can be designed to input hydraulic fluid up to the full rated pressure of the tool. The sealed housing of the hydraulic motor of the electric power generation assembly can be designed to retain hydraulic fluid within the interior up to the full rated pressure of the tool so that no case drain or separate low pressure return line for the hydraulic motor is necessary.

An output shaft of a hydraulic motor is enclosed within a sealed housing and coupled to an input shaft of an electric generator using non-contact couplings. Tool electrical components are electrically coupled to the electric generator. A high pressure hydraulic tool circuit includes a hydraulic tool load and the hydraulic motor of the electric power generation assembly coupleable between a hydraulic boom inlet line and a hydraulic boom return line. Both the hydraulic tool load and the hydraulic motor of the electric power generation assembly can be designed to input hydraulic fluid up to the full rated pressure of the tool. The sealed housing of the hydraulic motor of the electric power generation assembly can be designed to retain hydraulic fluid within the interior up to the full rated pressure of the tool so that no case drain or separate low pressure return line for the hydraulic motor is necessary.

The present disclosure relates to an apparatus and method for loading and unloading cargo of air mobility, in which cargo loading and unloading may be automated without the aid of human resources, as well as enabling loading and unloading of cargo in a required location without an air mobility landing. The apparatus includes a winch installed in a cargo hold of an air mobility, a multiarticulated robot arm suspended from the winch, and a gripper provided on an end of the multiarticulated robot arm and capable of gripping a container.

The present disclosure relates to an apparatus and method for loading and unloading cargo of air mobility, in which cargo loading and unloading may be automated without the aid of human resources, as well as enabling loading and unloading of cargo in a required location without an air mobility landing. The apparatus includes a winch installed in a cargo hold of an air mobility, a multiarticulated robot arm suspended from the winch, and a gripper provided on an end of the multiarticulated robot arm and capable of gripping a container.