Transmission arrangement and drive device for an electrically driven vehicle

Patent metadata

Field	Value
Publication number	US-11885396-B2
Application number	US-202117554458-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Dec 18, 2020
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A transmission arrangement for an at least partially electrically driven vehicle includes a first electric machine defining a first central longitudinal axis and having a first gear stage and a second gear stage. The arrangement further includes a second electric machine defining a second longitudinal axis and having a first gear stage and a second gear stage. Further, the arrangement includes a transmission housing, with the first and second electric machines being arranged in the transmission housing. Additionally, the arrangement includes a differential drivingly connected to the second gear stages of the first and second electric machines. The first and second central longitudinal axes are axially parallel to each other on a circular path, the circular path being perpendicular to an output axis.

First claim

The invention claimed is:

1. A transmission arrangement ( 16 ) for an at least partially electrically driven vehicle ( 1 ), comprising:
a first electric machine ( 3 a ) defining a first central longitudinal axis ( 9 a ) and having a first gear stage ( 6 a ) and a second gear stage ( 7 a );
a second electric machine ( 3 b ) defining a second longitudinal axis ( 9 b ) and having a first gear stage ( 6 b ) and a second gear stage ( 7 b );
a transmission housing ( 2 ), the first and second electric machines ( 3 a , 3 b ) being arranged in the transmission housing ( 2 );
a differential ( 8 ) drivingly connected to the second gear stages ( 7 a , 7 b ) of the first and second electric machines ( 3 a , 3 b ); and
at least one power electronics unit ( 4 a ) defining a third central longitudinal axis ( 9 c ),
wherein the first and second central longitudinal axes ( 9 a , 9 b ) are axially parallel to each other on a circular path ( 10 ), the circular path ( 10 ) being defined in a plane perpendicular to an output axis ( 5 ), and
wherein the third central longitudinal axis ( 9 c ) is on the circular path ( 10 ).

2. The transmission arrangement ( 16 ) of claim 1 , wherein the first central longitudinal axis ( 9 a ) is coaxial to a first rotor shaft ( 11 a ) of the first electric machine ( 3 a ), and
wherein the second longitudinal axis ( 9 b ) is coaxial to a second rotor shaft ( 11 b ) of the second electric machine ( 3 b ).

3. The transmission arrangement ( 16 ) of claim 1 , wherein the third central longitudinal axis ( 9 c ) is perpendicular to the circular path ( 10 ).

4. The transmission arrangement ( 16 ) of claim 1 , wherein each of the first gear stages ( 6 a , 6 b ) of the first and second electric machines ( 3 a , 3 b ) is a planetary transmission having at least one planetary gear set.

5. The transmission arrangement ( 16 ) of claim 1 , further comprising at least one clutch unit ( 15 ), each of the at least one clutch unit ( 15 ) configured for selectively decoupling a respective one of the first and second electric machines ( 3 a , 3 b ) from the differential ( 8 ).

6. The transmission arrangement ( 16 ) of claim 5 , wherein each of the at least one clutch unit ( 15 ) is arranged in power flow between a respective pair of the first and the second gear stages ( 6 a , 6 b , 7 a , 7 b ).

7. The transmission arrangement ( 16 ) of claim 1 , wherein one or more of the first gear stage ( 6 a ) of the first electric machine ( 3 a ) and the first gear stage ( 6 b ) of the second electric machine ( 3 b ) is a multi-stage unit configured for shifting between at least two gear stages.

8. The transmission arrangement ( 16 ) of claim 1 , wherein one or more of the second gear stage ( 7 a ) of the first electric machine ( 3 a ) and the second gear stage ( 7 b ) of the second electric machine ( 3 b ) is a multi-stage unit configured for shifting between at least two gear stages.

9. The transmission arrangement ( 16 ) of claim 1 , further comprising an oil sump ( 14 ) vertically below the first and second electric machines ( 3 a , 3 b ).

10. The transmission arrangement ( 16 ) of claim 1 , wherein the first and second central longitudinal axes ( 9 a , 9 b ) are perpendicular to the circular path ( 10 ).

11. A drive device for an at least partially electrically driven vehicle ( 1 ), comprising the transmission arrangement ( 16 ) of claim 1 .

12. An at least partially electrically driven vehicle ( 1 ), comprising the drive device of claim 11 .

13. An at least partially electrically driven vehicle ( 1 ), comprising the transmission arrangement ( 16 ) of claim 1 .

14. The transmission arrangement ( 16 ) of claim 1 , wherein the circular path ( 10 ) is centered on the output axis ( 5 ).

15. The transmission arrangement ( 16 ) of claim 1 , wherein the third central longitudinal axis is vertically below the first and second central longitudinal axes ( 9 a , 9 b ).

16. The transmission arrangement ( 16 ) of claim 1 , wherein the output axis ( 5 ) is an output rotational axis of the differential ( 8 ).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Wehlen Timo
• Scharr Stephan
• Lübke Eckhardt
• Till Manfred

Classifications

• F16H3/727 Primary

  with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path · CPC title

• B60K17/12

  of electric gearing · CPC title

• F16H3/70

  in which the central axis of the gearing lies inside the periphery of an orbital gear · CPC title

• F16H2200/0013

  specially adapted for rear-wheel-driven vehicles · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title