Transmission for the powertrain of a rail vehicle

A wheelset transmission for a power-train (1) of a rail vehicle, the wheelset transmission (3) comprising:

• an input shaft (4),
• an intermediate shaft (5),
• a drive output shaft (6),
• the input shaft (4) being connectable so as to be driven by a drive motor (2),
• the wheelset transmission (3) having at least two selectively shiftable transmission stages with different transmission ratios for a same travel direction, and a shifting device (7) for engaging the transmission stages,
• the two transmission stages being formed of a first spur gear pair (8), including a first spur gear (11) and a third spur gear (13), and a second spur gear pair (9), including a second spur gear (12) and a fourth spur gear (14),
• the first and the second spur gears (11, 12) each being arranged in a rotationally fixed manner on the input shaft (4) whereas the third and the fourth spur gears (13, 14) each being arranged so as to rotate about an intermediate shaft axis (17), and
• the third and the fourth spur gears (13, 14) being mounted to rotate in a housing (20) of the wheelset transmission (3) in each case on a bearing support stud (21, 22) fixed to the housing.

A power-train for a rail vehicle, having an electric drive motor (2) connected by a shaft coupling (33) so as to drive an input shaft (4) of a wheelset transmission (3),

• wherein the wheelset transmission (3) comprises the input shaft (4), an intermediate shaft (5) and a drive output shaft (6),
• the drive output shaft (6) is either formed as a wheelset shaft or is connected via a sprung component to the wheelset shaft,
• the wheelset transmission (3) comprises at least two selectively shiftable transmission stages with different transmission ratios for a same travel direction, and a shifting device (7) for engaging the transmission stages,
• the actuator (19) of the shifting device (7) is arranged close to the shaft coupling (33) in such manner os that, during operation, the rotating shaft coupling (33) produces an airflow in the area of the actuator (19) such that the actuator (19) is cooled by the airflow.

A wheelset transmission for a power-train of a rail vehicle, the wheelset transmission comprising:

• an input shaft,
• an intermediate shaft,
• a drive output shaft,
• the input shaft being drivably connectable to a drive motor;
• at least first and second spur gear pairs having different transmission ratios for a common travel direction and a shifting device for selectively engaging the first and the second spur gear pairs;
• the first spur gear pair having a first spur gear and a third spur gear;
• the second spur gear pair having a second spur gear and a fourth spur gear;
• the first and the second spur gears being connected to the input shaft in a rotationally fixed manner so as to rotate with the input shaft;
• and
• the third and the fourth spur gears being rotatably supported on a respective bearing support stud which being fixed to a housing of the wheelset transmission such that the third and the fourth spur gears are rotatable about an intermediate shaft axis.