Granted Patent B2

US 12,655,905 · App. 18/494,166 · Granted Jun 16, 2026

Inventors: Matthias List (Friedrichshafen, DE); Tobias Miller (Waldburg, DE); Stefan Borchert (Oberschwarzach, DE); Jörg Buhl (Schonungen, DE); Stephan Hahn (Bundorf, DE); Marco Kiesel (Oerlenbach, DE); Ralph Guehrer (Kressbronn, DE)

Assignee: ZF Friedrichshafen AG

F16H63/3458B60K1/00B60K17/08F16H1/20F16H3/44F16H57/029F16H57/0484F16H57/0495F16H63/3425B60K2001/001F16H2057/02026F16H2057/02034F16H2057/02052F16H2200/0021F16H2200/0034F16H2200/2005

Abstract

Claims (31)

1 . A transmission device ( 5 ) for an electrically drivable vehicle axle ( 1 ) comprising:

a transmission housing ( 11 );

a transmission input shaft ( 7 );

a transmission output shaft ( 10 ) connected to the transmission input shaft ( 7 ) via gear-wheel pairs ( 8 , 9 ); and

a parking lock device ( 15 ), the transmission output shaft ( 10 ) being rotationally fixable via the parking lock device ( 15 ), the parking lock device ( 15 ) being arranged in the transmission housing ( 11 ), the parking lock device ( 15 ) comprising an electric actuator ( 16 ) for actuating a locking pawl ( 18 ) engageable with or disengageable from a parking interlock gear ( 19 ) operatively connected to the transmission output shaft ( 10 ),

wherein the locking pawl ( 18 ) and the parking interlock gear ( 19 ) are arranged in an interior space ( 14 ) of the transmission housing ( 11 ) that is acted upon by oil, and the electric actuator ( 16 ) is arranged in an oil-free interior space ( 13 ) of the transmission housing ( 11 ),

wherein an output shaft ( 21 ) of the electric actuator ( 16 ) extends through an intermediate wall ( 12 ) separating the interior space ( 14 ) that is acted upon by oil from the oil-free interior space ( 13 ), and the electric actuator ( 16 ) is operatively connected to the locking pawl ( 18 ) on a side of the intermediate wall ( 12 ) facing away from the oil-free interior space ( 13 ), and

wherein an actuator housing ( 20 ) of the electric actuator ( 16 ) is within the oil-free interior space ( 13 ) of the transmission housing ( 11 ).

2 . The transmission device of claim 1 , wherein the electric actuator ( 16 ) is fastened on the intermediate wall ( 12 ) on a side of the intermediate wall ( 12 ) facing the oil-free interior space ( 13 ).

3 . The transmission device of claim 1 , wherein a parking lock mechanism ( 17 ) includes the locking pawl ( 18 ) and interacts with the output shaft ( 21 ) of the electric actuator ( 16 ), the parking lock mechanism ( 17 ) fastened on the intermediate wall ( 12 ) on the side of the intermediate wall ( 12 ) facing away from the oil-free interior space ( 13 ).

4 . The transmission device of claim 1 , wherein the parking interlock gear ( 19 ) is connected to the transmission input shaft ( 7 ) for conjoint rotation.

5 . The transmission device of claim 1 , wherein the parking interlock gear ( 8 ) is connected to an intermediate shaft ( 41 ) for conjoint rotation, the intermediate shaft ( 41 ) connected to the transmission output shaft ( 10 ) and to the transmission input shaft ( 7 ) via the gear-wheel pairs ( 8 , 9 ).

6 . The transmission device of claim 1 , wherein:

the output shaft ( 21 ) of the electric actuator ( 16 ) is rotatably mounted in an actuator housing ( 20 ), and the actuator housing ( 20 ) is sealingly connected to the intermediate wall ( 12 ) at least where the output shaft ( 21 ) extends through the intermediate wall ( 12 ); and

an interior space of the actuator housing ( 20 ) is sealed with respect to the interior space ( 14 ) of the transmission housing ( 11 ) that is acted upon by oil via a sealing unit between the actuator housing ( 20 ) and the output shaft ( 21 ).

7 . The transmission device of claim 1 , wherein an actuator housing ( 20 ) rests via one end face against the lateral face of the intermediate wall ( 12 ) facing the oil-free interior space ( 13 ), and a seal is disposed in a contact area between the actuator housing ( 20 ) and the intermediate wall ( 12 ).

8 . The transmission device of claim 1 , wherein:

an actuator housing ( 20 ) engages into an opening in the intermediate wall ( 12 ), and the oil-free interior space ( 13 ) of the transmission housing ( 11 ) is sealed via a seal with respect to the interior space ( 14 ) that is acted upon by oil; and

the seal is disposed in an area of the opening radially between the intermediate wall ( 12 ) and the actuator housing ( 20 ).

9 . The transmission device of claim 1 , wherein the gear-wheel pairs ( 8 , 9 ) comprise spur gears ( 37 , 38 , 39 , 40 ), which at least partially intermesh and are arranged on the transmission input shaft ( 7 ), an intermediate shaft ( 41 ) and the transmission output shaft ( 10 ).

10 . A drive device ( 2 ) for an electrically drivable vehicle axle ( 1 ), comprising:

an electric machine ( 3 );

an inverter ( 4 ) for the electric machine ( 3 ); and

the transmission device ( 5 ) of claim 1 ,

wherein an output shaft ( 6 ) of the electric machine ( 3 ) is connected to the transmission input shaft ( 7 ).

11 . The drive device of claim 10 , wherein:

the electric machine ( 3 ), the inverter ( 4 ), and the transmission device ( 5 ) are arranged in the transmission housing ( 11 ); and

the inverter ( 4 ) and the electric actuator ( 16 ) of the parking lock device ( 15 ) are arranged in the oil-free interior space ( 13 ) of the transmission housing ( 11 ).

12 . An electrically drivable vehicle axle ( 1 ), comprising the drive device ( 2 ) of claim 10 for electrically driving a vehicle.

13 . The transmission device of claim 1 , wherein the parking lock device ( 15 ) is arranged fully within the transmission housing ( 11 ).

14 . The transmission device of claim 1 , wherein the electric actuator ( 16 ) of the parking lock device ( 15 ) is arranged within the transmission housing ( 11 ).

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (30)