An embodiment of the present disclosure provides an overhead hoist transport system including: a driving rail configured to extend in a first direction; a support rail positioned parallel to the driving rail; and a crane movably connected to the driving rail and the support rail and configured to move along the driving rail and the support rail, wherein the crane includes: a base configured to extend in a second direction perpendicular to the first direction to cross the driving rail and the support rail; a driving wheel connected to the base and configured to move along the driving rail; and a guide wheel connected to the base and pressed toward a contact surface of the support rail to remain in contact with the support rail, the contact surface being a surface in contact with the guide wheel.

An embodiment of the present disclosure provides an overhead hoist transport system including: a driving rail configured to extend in a first direction; a support rail positioned parallel to the driving rail; and a crane movably connected to the driving rail and the support rail and configured to move along the driving rail and the support rail, wherein the crane includes: a base configured to extend in a second direction perpendicular to the first direction to cross the driving rail and the support rail; a driving wheel connected to the base and configured to move along the driving rail; and a guide wheel connected to the base and pressed toward a contact surface of the support rail to remain in contact with the support rail, the contact surface being a surface in contact with the guide wheel.

A bogie includes a chassis, including two beams, two crosspieces, two axle structures, each including two journal boxes, and a transverse axle shaft, extending in the transverse direction between two ends each supporting a respective wheel, the wheels defining an inner space between them, defined in the transverse direction between the wheels of a same axle shaft, and defined in the longitudinal direction between the two axle shafts, at least one motor supported by one of the crosspieces of the chassis, arranged in the inner space defined by the wheels, and including a coupling shaft, and at least one reducer. The bogie includes a primary suspension, including flexible mountings arranged between the crosspieces and the beams of the chassis, the reducer is arranged outside the inner space, the coupling shaft of the motor extending from the motor beyond one of the corresponding beams to the reducer.

A bogie includes a chassis, including two beams, two crosspieces, two axle structures, each including two journal boxes, and a transverse axle shaft, extending in the transverse direction between two ends each supporting a respective wheel, the wheels defining an inner space between them, defined in the transverse direction between the wheels of a same axle shaft, and defined in the longitudinal direction between the two axle shafts, at least one motor supported by one of the crosspieces of the chassis, arranged in the inner space defined by the wheels, and including a coupling shaft, and at least one reducer. The bogie includes a primary suspension, including flexible mountings arranged between the crosspieces and the beams of the chassis, the reducer is arranged outside the inner space, the coupling shaft of the motor extending from the motor beyond one of the corresponding beams to the reducer.

A track maintenance machine includes a combustion engine mechanically connected by a drive shaft to an electric generator/motor unit. The electric generator/motor unit is connected by a mechanical drive unit to a hydraulic pump. A power accumulator is connected by an electrical supply line to the generator/motor unit and to drives which can be actuated electrically. It is thus possible to mainly electrically supply all of the drives.

A track maintenance machine includes a combustion engine mechanically connected by a drive shaft to an electric generator/motor unit. The electric generator/motor unit is connected by a mechanical drive unit to a hydraulic pump. A power accumulator is connected by an electrical supply line to the generator/motor unit and to drives which can be actuated electrically. It is thus possible to mainly electrically supply all of the drives.

A monorail vehicle includes a chassis supporting a vehicle body, that includes a passenger floor and at least one side wall, and an electrical motor supported by the chassis. A drive wheel is coupled to a rotor of the electric motor with a rotation axis of the drive wheel substantially coaxial with an axis of the rotor. Portions of the drive wheel and the electric motor are positioned on both sides of an imaginary plane extension of the passenger floor. The drive wheel and the electric motor are covered by a shell that is integral to one side of the vehicle body and which defines a space between the other side of the vehicle body.

A monorail vehicle includes a chassis supporting a vehicle body, that includes a passenger floor and at least one side wall, and an electrical motor supported by the chassis. A drive wheel is coupled to a rotor of the electric motor with a rotation axis of the drive wheel substantially coaxial with an axis of the rotor. Portions of the drive wheel and the electric motor are positioned on both sides of an imaginary plane extension of the passenger floor. The drive wheel and the electric motor are covered by a shell that is integral to one side of the vehicle body and which defines a space between the other side of the vehicle body.

A low-cost railway vehicle gear device of parallel cardan drive system is provided in which the vibrations and noises can be reduced only by means of 2-D tooth surface modifications. In a railway vehicle gear device of parallel cardan drive system having a helical pinion (1) and a helical gear wheel (2), a pinion and a gear wheel respectively having gear specifications of module of 4 to 8, pressure angle of 20 to 30?, and helix angle of 15 to 30?, crowning is performed on a gear surface in the flank line direction of the pinion. The tooth surface (11) has a shape of a sinusoidal curve with an apex (11a) being positioned in a central area of the face width direction of the pinion, the sinusoidal curve being expressed by a single sinusoidal function and extending over an entire width in the face width direction of the helical pinion.

A low-cost railway vehicle gear device of parallel cardan drive system is provided in which the vibrations and noises can be reduced only by means of 2-D tooth surface modifications. In a railway vehicle gear device of parallel cardan drive system having a helical pinion (1) and a helical gear wheel (2), a pinion and a gear wheel respectively having gear specifications of module of 4 to 8, pressure angle of 20 to 30?, and helix angle of 15 to 30?, crowning is performed on a gear surface in the flank line direction of the pinion. The tooth surface (11) has a shape of a sinusoidal curve with an apex (11a) being positioned in a central area of the face width direction of the pinion, the sinusoidal curve being expressed by a single sinusoidal function and extending over an entire width in the face width direction of the helical pinion.