Granted Patent B2

US 12,392,401 · App. 18/441,583 · Granted Aug 19, 2025

Inventors: Tamas Gyarmati (Bermatingen, DE); Matthias Reisch (Ravensburg, DE); Philip Dötschel (Friedrichshafen, DE); Eckhardt Lübke (Friedrichshafen, DE); Hagen Doepfert (Lindau, DE)

Assignee: ZF Friedrichshafen AG

F16H37/0833F16H2048/368F16H2200/2007

Abstract

Claims (56)

1. A transmission ( 1 ) for a drive train of a vehicle ( 100 ), comprising:

an input shaft ( 2 );

a first output shaft ( 3 );

a second output shaft ( 4 ); and

a differential arranged in power flow between the input shaft ( 2 ) and the first and second output shafts ( 3 , 4 ), the differential comprising a first planetary gear set ( 5 ) with a plurality of planet gears ( 5 . 4 ) and a plurality of gear set elements, a first output torque transmittable onto the first output shaft ( 3 ) by the first planetary gear set ( 5 ), the differential comprising a second planetary gear set ( 6 ) with a plurality of planet gears ( 6 . 4 ) and a plurality of gear set elements, a support torque of the first planetary gear set ( 5 ) convertible in the second planetary gear set ( 6 ) such that a second output torque corresponding to the first output torque is transmittable onto the second output shaft ( 4 ),

wherein a first gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the input shaft ( 2 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to a first gear set element of the gear set elements of the second planetary gear set ( 6 ) for conjoint rotation,

wherein a third gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the first output shaft ( 3 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the second planetary gear set ( 6 ) is connected to the second output shaft ( 4 ) for conjoint rotation,

wherein a third gear set element of the second planetary gear set ( 6 ) is connected to a stationary component for conjoint rotation,

wherein the second planetary gear set ( 6 ) is axially adjacent the first planetary gear set ( 5 ), and the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) do not axially overlap the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ),

wherein an outer diameter of the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) are greater than an outer diameter of the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ), and

wherein the second planetary gear set ( 6 ) and the second output shaft ( 4 ) at least partially axially overlap.

2. The transmission ( 1 ) of claim 1 , wherein the first gear set element of the first planetary gear set ( 5 ) comprises a sun gear ( 5 . 1 ), the second gear set element of the first planetary gear set ( 5 ) comprises a ring gear ( 5 . 2 ), and the third gear set element of the first planetary gear set ( 5 ) comprises a planet carrier ( 5 . 3 ).

3. The transmission ( 1 ) of claim 1 , wherein the first gear set element of the second planetary gear set ( 6 ) comprises a sun gear ( 6 . 1 ), the second gear set element of the second planetary gear set ( 6 ) comprises a ring gear ( 6 . 2 ), and the third gear set element of the second planetary gear set ( 6 ) comprises a planet carrier ( 6 . 3 ).

4. The transmission ( 1 ) of claim 1 , wherein:

the first gear set element of the first planetary gear set ( 5 ) comprises a sun gear ( 5 . 1 ), the second gear set element of the first planetary gear set ( 5 ) comprises a ring gear ( 5 . 2 ), and the third gear set element of the first planetary gear set ( 5 ) comprises a planet carrier ( 5 . 3 );

the first gear set element of the second planetary gear set ( 6 ) comprises a sun gear ( 6 . 1 ), the second gear set element of the second planetary gear set ( 6 ) comprises a ring gear ( 6 . 2 ), and the third gear set element of the second planetary gear set ( 6 ) comprises a planet carrier ( 6 . 3 ); and

the ring gear ( 5 . 2 ) of the first planetary gear set ( 5 ) has a larger outer diameter than the sun gear ( 6 . 1 ) of the second planetary gear set ( 6 ), and the sun gear ( 6 . 1 ) of the second planetary gear set ( 6 ) is arranged at least indirectly axially at the ring gear ( 5 . 2 ) of the first planetary gear set ( 5 ).

5. The transmission ( 1 ) of claim 1 , further comprising a bearing ( 7 ) for mounting the second output shaft ( 4 ), the bearing ( 7 ) arranged at least partially radially inside the second planetary gear set ( 6 ).

6. The transmission ( 1 ) of claim 1 , further comprising an oil feed ( 8 ) for the second output shaft ( 4 ) arranged at least partially radially inside the second planetary gear set ( 6 ).

7. The transmission ( 1 ) of claim 6 , wherein the oil feed ( 8 ) comprises a ring element ( 9 ) arranged radially between the stationary component and the second output shaft ( 4 ).

8. The transmission ( 1 ) of claim 1 , further comprising:

a bearing ( 7 ) for mounting the second output shaft ( 4 ), the bearing ( 7 ) arranged at least partially radially inside the second planetary gear set ( 6 ); and

an oil feed ( 8 ) for the second output shaft ( 4 ) arranged at least partially radially inside the second planetary gear set ( 6 ),

wherein the oil feed ( 8 ) is arranged axially adjacent the bearing ( 7 ) for mounting the second output shaft ( 4 ).

9. The transmission ( 1 ) of claim 8 , wherein the oil feed ( 8 ) comprises a ring element ( 9 ) arranged radially between the stationary component and the second output shaft ( 4 ).

10. The transmission ( 1 ) of claim 1 , wherein the outer diameter of the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) is at least twice as great as the outer diameter of the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ).

11. The transmission ( 1 ) of claim 1 , wherein the second planetary gear set ( 6 ) is arranged with the gear set elements of the second planetary gear set ( 6 ) radially outward of a rotation axis (B) of each of the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ).

12. A vehicle ( 100 ), comprising a drive train with a drive unit ( 10 ) and the transmission ( 1 ) of claim 1 .

13. A transmission ( 1 ) for a drive train of a vehicle ( 100 ), comprising:

an input shaft ( 2 );

a first output shaft ( 3 );

a second output shaft ( 4 );

a differential arranged in power flow between the input shaft ( 2 ) and the first and second output shafts ( 3 , 4 ), the differential comprising a first planetary gear set ( 5 ) with a plurality of planet gears ( 5 . 4 ) and a plurality of gear set elements, a first output torque transmittable onto the first output shaft ( 3 ) by the first planetary gear set ( 5 ), the differential comprising a second planetary gear set ( 6 ) with a plurality of planet gears ( 6 . 4 ) and a plurality of gear set elements, a support torque of the first planetary gear set ( 5 ) convertible in the second planetary gear set ( 6 ) such that a second output torque corresponding to the first output torque is transmittable onto the second output shaft ( 4 ); and

a bearing ( 7 ) for mounting the second output shaft ( 4 ), the bearing ( 7 ) arranged at least partially radially inside the second planetary gear set ( 6 ),

wherein a first gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the input shaft ( 2 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to a first gear set element of the gear set elements of the second planetary gear set ( 6 ) for conjoint rotation,

wherein a third gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the first output shaft ( 3 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the second planetary gear set ( 6 ) is connected to the second output shaft ( 4 ) for conjoint rotation,

wherein a third gear set element of the second planetary gear set ( 6 ) is connected to a stationary component for conjoint rotation,

wherein the second planetary gear set ( 6 ) is axially adjacent the first planetary gear set ( 5 ), and the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) do not axially overlap the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ), and

wherein an outer diameter of the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) are greater than an outer diameter of the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ).

14. A transmission ( 1 ) for a drive train of a vehicle ( 100 ), comprising:

an input shaft ( 2 );

a first output shaft ( 3 );

a second output shaft ( 4 );

a differential arranged in power flow between the input shaft ( 2 ) and the first and second output shafts ( 3 , 4 ), the differential comprising a first planetary gear set ( 5 ) with a plurality of planet gears ( 5 . 4 ) and a plurality of gear set elements, a first output torque transmittable onto the first output shaft ( 3 ) by the first planetary gear set ( 5 ), the differential comprising a second planetary gear set ( 6 ) with a plurality of planet gears ( 6 . 4 ) and a plurality of gear set elements, a support torque of the first planetary gear set ( 5 ) convertible in the second planetary gear set ( 6 ) such that a second output torque corresponding to the first output torque is transmittable onto the second output shaft ( 4 ); and

an oil feed ( 8 ) for the second output shaft ( 4 ) arranged at least partially radially inside the second planetary gear set ( 6 ),

wherein a first gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the input shaft ( 2 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to a first gear set element of the gear set elements of the second planetary gear set ( 6 ) for conjoint rotation,

wherein a third gear set element of the gear set elements of the first planetary gear set ( 5 ) is connected to the first output shaft ( 3 ) for conjoint rotation,

wherein a second gear set element of the gear set elements of the second planetary gear set ( 6 ) is connected to the second output shaft ( 4 ) for conjoint rotation,

wherein a third gear set element of the second planetary gear set ( 6 ) is connected to a stationary component for conjoint rotation,

wherein the second planetary gear set ( 6 ) is axially adjacent the first planetary gear set ( 5 ), and the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) do not axially overlap the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ), and

wherein an outer diameter of the planet gears ( 5 . 4 ) of the first planetary gear set ( 5 ) are greater than an outer diameter of the planet gears ( 6 . 4 ) of the second planetary gear set ( 6 ).

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)