There is provided a reduction gear unit including: a pinion; a bearing that is located on each of both sides of the pinion; a large gear that meshes with the pinion; a gear case that stores therein lubricant oil, and accommodates the pinion and the gear; and pinion bearing caps each of which includes an annular portion, wherein the annular portion extends from outside of the gear case toward inside thereof and parallel to a pinion shaft, and includes an end portion in which an end surface in an extending-direction is provided on a side of the pinion with respect to an extended line of a gear-side end surface of an inner race of the bearing, and an inner peripheral surface of the end portion is formed so that a diameter is decreased from a gear-side end surface of an outer race toward the end surface.

Disclosed is a bogie framework of a rail vehicle and a bogie, wherein the bogie framework of the rail vehicle includes a first end beam (01), a second end beam (02) and a box beam disposed between the first end beam (01) and the second end beam (02). The box beam includes a primary gearbox (1) and a secondary gearbox (2), and the primary gearbox (1) is used for connecting a traction motor and the secondary gearbox (2). The secondary gearbox (2) is disposed between the primary gearbox (1) and the first end beam (01), as well as between the primary gearbox (1) and the second end beam (02).

Disclosed is a bogie framework of a rail vehicle and a bogie, wherein the bogie framework of the rail vehicle includes a first end beam (01), a second end beam (02) and a box beam disposed between the first end beam (01) and the second end beam (02). The box beam includes a primary gearbox (1) and a secondary gearbox (2), and the primary gearbox (1) is used for connecting a traction motor and the secondary gearbox (2). The secondary gearbox (2) is disposed between the primary gearbox (1) and the first end beam (01), as well as between the primary gearbox (1) and the second end beam (02).

Disclosed is a bogie for a rail vehicle. One embodiment of a rail vehicle includes a bogie frame and at least four wheels arranged at the bogie frame. The bogie frame has a first and second frame parts, each frame part including a longitudinal beam and a cross beam. Each cross beam can be fixedly attached at the first end to the respective longitudinal beam. Each cross beam includes a pin at the second end. The longitudinal beam of the first frame part includes a receptacle for the pin of the second frame part and the longitudinal beam of the second frame part has a receptacle for the pin of the first frame part. The bogie can include one or more at bushing that includes elastomeric material, such as an elastomeric flange bushing, where the bushing is fixed to each cross beam or to the pin of the cross beam.

A chassis (100), in particular a low-floor chassis, for a rail vehicle, in particular for a tram-way. The chassis (100) comprises at least four wheels (4) each having a wheel bearing, at least two wheel axles for suspending the wheels (4), a chassis frame (1) and a primary suspension for suspending the wheels (4) relative to the chassis frame (1). The primary suspension has at least four torsion bars (20). Two torsion bars (20) each, in particular two torsion bars on one side of the chassis, are connected via a connecting element (21) in such a way that the torque of the torsion bars (20) oppose each other, in particular the torques essentially cancel each other out.

The invention relates to an electric traction motor, comprising: a motor shaft; a rotor fixed to the motor shaft; a stator coupled to the rotor; and a motor frame fixed to the stator.

A first and a second ends of the motor shaft are situated outside of the motor frame.

The motor shaft comprises: a main channel, extending between the first and the second ends of the motor shaft; and a plurality of secondary channels connected to an end of the main channel.

The motor also comprises a fan attached to the second end of the motor shaft, so as to generate an air flux through the main channel and secondary channels.

The invention relates to an electric traction motor, comprising: a motor shaft; a rotor fixed to the motor shaft; a stator coupled to the rotor; and a motor frame fixed to the stator.

A first and a second ends of the motor shaft are situated outside of the motor frame.

The motor shaft comprises: a main channel, extending between the first and the second ends of the motor shaft; and a plurality of secondary channels connected to an end of the main channel.

The motor also comprises a fan attached to the second end of the motor shaft, so as to generate an air flux through the main channel and secondary channels.

A gearbox configured to be used in the transmission of a rail vehicle, the gearbox configured to be a plunge-lubricated gearbox using oil as lubricant, the gearbox comprising at least one filter element, wherein the gearbox is configured to be a gearbox with a shaft for distributing the oil to different bearings of the gearbox, and characterized in that the at least one filter element is configured to be placed in the shaft and through which the oil is transported.

A chassis for a rail vehicle includes at least one chassis frame to which at least one first wheel set and a second wheel set are coupled and to which at least one first drive unit and a second drive unit are connected, wherein a first coupling rod is connected at least to the first drive unit in an articulated manner and is configured to be coupleable to the vehicle body of the rail vehicle in an elastic manner, such that advantageous structural conditions are achieved.

A chassis for a rail vehicle includes at least one chassis frame to which at least one first wheel set and a second wheel set are coupled and to which at least one first drive unit and a second drive unit are connected, wherein a first coupling rod is connected at least to the first drive unit in an articulated manner and is configured to be coupleable to the vehicle body of the rail vehicle in an elastic manner, such that advantageous structural conditions are achieved.