Transmission for the powertrain of a rail vehicle
AssigneeZF Friedrichshafen AG
InventorChristoph Sacher
Life of this patent
Estimating the term…
Abstract
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.
Claims15
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 connectable so as to be driven by a drive motor,
- the wheelset transmission having at least two selectively engagable transmission stages with different transmission ratios for a same travel direction, and a shifting device for selectively engaging the two transmission stages independent of each other,
- the two transmission stages being formed of a first spur gear pair, including a first spur gear and a third spur gear, and a second spur gear pair, including a second spur gear and a fourth spur gear,
- the first and the second spur gears each being arranged in a rotationally fixed manner on the input shaft whereas the third and the fourth spur gears each being arranged so as to rotate about an intermediate shaft axis, and
- the third and the fourth spur gears being mounted to rotate in a housing of the wheelset transmission in each case on a bearing support stud fixed to the housing.
A power-train for a rail vehicle, having an electric drive motor connected by a shaft coupling so as to drive an input shaft of a wheelset transmission,
- wherein the wheelset transmission comprises the input shaft, an intermediate shaft and a drive output shaft,
- the drive output shaft is either formed as a wheelset shaft or is connected, via a sprung component, to the wheelset shaft,
- the wheelset transmission comprises at least two selectively shiftable transmission stages with different transmission ratios for a same travel direction, and a shifting device for engaging the transmission stages,
- an actuator of the shifting device is arranged close to the shaft coupling in such a manner so that, during operation, the rotating shaft coupling produces an airflow in an area of the actuator such that the actuator is cooled by the airflow, and
- the sprung component comprises a cardan coupling.
A wheelset transmission for a power-train of a rail vehicle, the wheelset transmission comprising:
- an input shaft,
- a hollow intermediate shaft having an axial bore,
- 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;
- 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;
- the shifting device comprises a shifting member which is rotationally fixedly mounted and axially movably relative to the intermediate shaft, and the shifting member is axially movable by an actuator of the shifting device such that either the third spur gear or the fourth spur gear is selectively connectable to the intermediate shaft in a rotationally fixed manner;
- and
- the shifting member is actuatable by the actuator through the axial bore in the intermediate shaft.
Dependencies are inferred from the claim text.