US 12,403,761 B2
Left-right wheel drive device
Kiminobu Terao, Tokyo (JP); Naoki Takahashi, Tokyo (JP); Toshihisa Mizutani, Kariya (JP); and Taiki Owari, Kariya (JP)
Assigned to MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo (JP); and AISIN CORPORATOIN, Kariya (JP)
Appl. No. 18/727,553
Filed by MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, Tokyo (JP); and AISIN CORPORATION, Kariya (JP)
PCT Filed Dec. 7, 2022, PCT No. PCT/JP2022/045141
§ 371(c)(1), (2) Date Jul. 9, 2024,
PCT Pub. No. WO2023/145267, PCT Pub. Date Aug. 3, 2023.
Claims priority of application No. 2022-011499 (JP), filed on Jan. 28, 2022.
Prior Publication US 2025/0074186 A1, Mar. 6, 2025
Int. Cl. B60K 17/04 (2006.01); B60K 1/02 (2006.01); B60K 7/00 (2006.01); B60K 17/16 (2006.01); F16H 48/05 (2012.01); F16H 48/06 (2006.01); F16H 57/021 (2012.01)
CPC B60K 17/16 (2013.01) [B60K 7/0007 (2013.01); B60K 17/046 (2013.01); F16H 48/05 (2013.01); F16H 48/06 (2013.01); F16H 57/021 (2013.01); B60K 1/02 (2013.01); B60K 2007/0061 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A left-right wheel drive device that accommodates, in a casing, two electric motors that drive a vehicle and a planetary gear mechanism that amplifies a torque difference between the two electric motors and transmits torques to left and right wheels of the vehicle, wherein
the two electric motors are spaced apart from each other and are arranged such that rotating shafts thereof are on a same axial center,
the planetary gear mechanism comprises a first sun gear for inputting, a second sun gear for outputting, a carrier for outputting, pinion gears, and a ring gear for inputting, is arranged on an axial center in parallel with and different from the rotating shafts, and, is arranged so as to be offset on a first side in an axial direction in the casing;
the left-right wheel drive device comprises
a pair of motor shafts having a same axial center as the rotating shafts of the two electric motors, being positioned between the two electric motors, and being fixed each with one of motor gears,
a pair of counter shafts being arranged in parallel with the pair of motor shafts and being fixed each with one of first counter gears and one of second counter gears, the first counter gears each meshing with one of the motor gears, the second counter gears being smaller in diameter than the first counter gears,
a first output shaft being arranged in parallel with the pair of motor shafts and on the first side from the planetary gear mechanism, and being fixed with the carrier at an end portion on a second side in the axial direction of the first output shaft,
a second output shaft being arranged on a same axial center as the first output shaft, being longer than the first output shaft, being fixed with the second sun gear at an end portion on the first side of the second output shaft, and
a supporting member being fixed to the casing in the casing so as to extend in a direction perpendicular to the axial direction;
the supporting member is located on the second side from a driven gear meshing with the second counter gear arranged on the second side, and is located on the first side from one of the electric motors arranged on the second side, and
the second output shaft is rotatably supported by one roller bearing at the end portion on the second side with respect to the casing, and is further rotatably supported by another roller bearing at a position on the second side from the driven gear with respect to the supporting member.