A monorail vehicle includes two bogie assemblies supporting different ends of a chassis. Each bogie assembly includes guide wheels rotatably connected to a bogie frame, a wheel assembly for rolling along a top of a guide beam, and a drive unit. The drive unit includes an electric motor attached to the bogie frame via a mounting flange that is located within a first lateral half of the body, a brake unit, and a planetary gear assembly coupled to a rotor of the electric motor. The planetary gear assembly is located on a first side of the electric motor and the wheel assembly is mounted to an output of the planetary gear assembly. The drive unit is attached whereupon the wheel assembly may be dismounted from the drive unit in a direction of a second lateral half of the body without dismounting the drive unit from the bogie frame.

An electric machine has a rotor on a rotor shaft. The rotor shaft is supported on bearings such that the rotor and the rotor shaft are rotatable around an axis of rotation. The rotor is surrounded radially on the outside by a stator, the stator by a casing. Covering elements are arranged at the axial ends of the rotor and stator, by which the rotor and the stator are enclosed with respect to the environment of the electric machine. One covering element is surrounded radially on the outside, and axially on the side facing away from the rotor and stator there, by an air guide element, the other covering element by an inner ring element. First and second cooling channels running axially are arranged in the casing or between the casing and stator. Rotor channels running axially are arranged in the rotor shaft and/or in the rotor.

A semiconductor device according to an embodiment includes a silicon carbide layer, a silicon oxide layer having a peak frequency of a longitudinal wave optical mode of 1245 cm.sup.?1 or more at a position 0.5 nm away from the silicon carbide layer, and a region located between the silicon carbide layer and the silicon oxide layer and having a nitrogen concentration of 1?10.sup.21 cm.sup.?3 or more. The concentration distribution of nitrogen in the silicon carbide layer, the silicon oxide layer, and the region has a peak in the region.

The present disclosure provides a bogie, a rail vehicle having same, and a rail transport system. The bogie includes: a bogie frame, where the bogie frame has a straddle recess straddling a rail; a first running wheel and a second running wheel, where the first running wheel and the second running wheel are pivotably mounted onto the bogie frame respectively and are coaxially spaced apart; a third running wheel and a fourth running wheel, where the third running wheel and the fourth running wheel are pivotably mounted onto the bogie frame respectively and are coaxially spaced apart; a driving device, where the driving device is located between the first running wheel and the second running wheel, and the first running wheel and the second running wheel are driven by the driving device; and/or the driving device is located between the third running wheel and the fourth running wheel, and the third running wheel and the fourth running wheel are driven by the driving device. The bogie according to this embodiment of the present disclosure facilitates optimization of the structure of an escape passage, and has advantages such as high space utilization, high stability, and strong weight bearing capability.

The present disclosure provides a bogie, a rail vehicle having same, and a rail transport system. The bogie includes: a bogie frame, where the bogie frame has a straddle recess straddling a rail; a first running wheel and a second running wheel, where the first running wheel and the second running wheel are pivotably mounted onto the bogie frame respectively and are coaxially spaced apart; a third running wheel and a fourth running wheel, where the third running wheel and the fourth running wheel are pivotably mounted onto the bogie frame respectively and are coaxially spaced apart; a driving device, where the driving device is located between the first running wheel and the second running wheel, and the first running wheel and the second running wheel are driven by the driving device; and/or the driving device is located between the third running wheel and the fourth running wheel, and the third running wheel and the fourth running wheel are driven by the driving device. The bogie according to this embodiment of the present disclosure facilitates optimization of the structure of an escape passage, and has advantages such as high space utilization, high stability, and strong weight bearing capability.

The present disclosure discloses a rail vehicle. The rail vehicle includes: a plurality of bogies, where the bogie has a straddle recess suitable for straddling a rail; and a vehicle body, where the vehicle body is connected to the plurality of bogies and pulled by the plurality of bogies to travel along the rail, and the vehicle body includes a plurality of compartments hinged sequentially along a length direction of the rail; at least one bogie is disposed on one of the bottom of each of the compartments and a hinging position of neighboring compartments; and in the length direction of the rail, a surface that is of a compartment at at least one end of the vehicle body and that faces away from an adjacent compartment is provided with an escape door that can be opened and closed. The rail vehicle according to this embodiment of the present disclosure facilitates optimization of the structure of an escape passage, reduction in costs, reduction in occupied space and the weight borne by the rail, and improvement in stability, and is high in stability of supporting the vehicle body and large in passenger capacity.

The present disclosure discloses a rail vehicle. The rail vehicle includes: a plurality of bogies, where the bogie has a straddle recess suitable for straddling a rail; and a vehicle body, where the vehicle body is connected to the plurality of bogies and pulled by the plurality of bogies to travel along the rail, and the vehicle body includes a plurality of compartments hinged sequentially along a length direction of the rail; at least one bogie is disposed on one of the bottom of each of the compartments and a hinging position of neighboring compartments; and in the length direction of the rail, a surface that is of a compartment at at least one end of the vehicle body and that faces away from an adjacent compartment is provided with an escape door that can be opened and closed. The rail vehicle according to this embodiment of the present disclosure facilitates optimization of the structure of an escape passage, reduction in costs, reduction in occupied space and the weight borne by the rail, and improvement in stability, and is high in stability of supporting the vehicle body and large in passenger capacity.

A transmission for the power-train of a rail vehicle, in which the transmission (3) includes an input shaft (4), an intermediate shaft (5) and a drive output shaft (6). The input shaft (4) can be connected so as to be driven by a drive motor (2), and the drive output shaft (6) forms a wheelset shaft of the rail vehicle. The transmission (3) has at least two selectively shiftable transmission stages with different transmission ratios for the same travel direction, and a shifting device (7) for engaging the transmission stages. Furthermore, a power-train for a rail vehicle having a transmission of such type is proposed.

A transmission for the power-train of a rail vehicle, in which the transmission (3) includes an input shaft (4), an intermediate shaft (5) and a drive output shaft (6). The input shaft (4) can be connected so as to be driven by a drive motor (2), and the drive output shaft (6) forms a wheelset shaft of the rail vehicle. The transmission (3) has at least two selectively shiftable transmission stages with different transmission ratios for the same travel direction, and a shifting device (7) for engaging the transmission stages. Furthermore, a power-train for a rail vehicle having a transmission of such type is proposed.

The present disclosure discloses a rail transport system. The rail transport system includes: a rail, where the rail is provided with an escape passage; and a rail vehicle, where the rail vehicle includes a vehicle body and a plurality of bogies, the plurality of bogies respectively movably straddles the rail, and the vehicle body is connected to the plurality of bogies and pulled by the plurality of bogies to travel along the rail; and the vehicle body includes a plurality of compartments hinged sequentially along a length direction of the rail, the plurality of compartments forms at least one compartment group, the compartment group includes three compartments hinged sequentially, and the bottom of each of only compartments that are located at two ends of the compartment group and that are of the three compartments is connected to the bogie. The rail transport system according to this embodiment of the present disclosure has advantages such as facilitation of evacuation of passengers in an emergency, low costs, small occupied space, small rail weight bearing, high stability, and flexible steering.