Electric drive device for a motor vehicle, in particular for a motor car, and motor vehicle

Patent metadata

Field	Value
Publication number	US-12352340-B2
Application number	US-202218698895-A
Country	US
Kind code	B2
Filing date	Sep 9, 2022
Priority date	Oct 7, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

An electric drive device for a motor vehicle includes a housing, an electric engine having a rotor, a planetary transmission at least partially arranged in the housing, a first planetary gear set having a first sun gear connected to the rotor for conjoint rotation, a first planetary carrier, and a first annular gear, and a second planetary gear set having a second planetary carrier connected to the first planetary carrier for conjoint rotation and a second annular gear; at least two switch elements for switching at least two gears, and a differential having a differential input shaft and two output drive shafts. The second planetary gear set has a second sun gear which is connected to the differential input shaft for conjoint rotation.

First claim

The invention claimed is:

1. An electric drive device for a motor vehicle, the electric drive device comprising:
a housing;
an electric engine having a rotor and configured to drive the motor vehicle;
a planetary transmission, at least partially arranged in the housing, comprising
a first single planetary gear set comprising a first sun gear connected to the rotor for conjoint rotation, a first single planetary carrier, and a first annular gear, and
a second single planetary gear set comprising a second single planetary carrier connected to the first single planetary carrier for conjoint rotation, and a second annular gear;

at least two switch elements, which includes a first switch element and a second switch element, configured to switch at least two gears; and
a differential having a differential input shaft and two output drive shafts,
wherein the second single planetary gear set has a second sun gear connected to the differential input shaft for conjoint rotation, and
wherein the second switch element is configured to connect two of three transmission elements of the second single planetary gear set.

2. The electric drive device of claim 1 , wherein the first switch element is configured to connect the second annular gear to the housing for conjoint rotation.

3. The electric drive device of claim 1 , wherein the second switch element has a claw coupling.

4. The electric drive device of claim 3 , wherein the second switch element has a freewheel coupling arranged in parallel with the claw coupling.

5. The electric drive device of claim 1 , wherein the two of the three transmission elements of the second single planetary gear set include the second sun gear and the second annular gear, and the second switch element is configured to connect the second sun gear to the second annular gear for conjoint rotation.

6. The electric drive device of claim 1 , further comprising:
a park gear connected to the second sun gear for conjoint rotation.

7. The electric drive device of claim 1 , wherein the first annular gear is permanently connected to the housing for conjoint rotation.

8. The electric drive device of claim 1 , wherein the second single planetary gear set is arranged axially overlapping the differential.

9. A motor vehicle, comprising:
a first and second wheel; and
an electric drive device comprising
a housing;
an electric engine having a rotor and configured to drive the motor vehicle;
a planetary transmission, at least partially arranged in the housing, comprising
a first single planetary gear set comprising a first sun gear connected to the rotor for conjoint rotation, a first single planetary carrier, and a first annular gear, and
a second single planetary gear set comprising a second single planetary carrier connected to the first single planetary carrier for conjoint rotation, and a second annular gear;

at least two switch elements, which includes a first switch element and a second switch element, configured to switch at least two gears;
a differential having a differential input shaft and two output drive shafts, wherein the each of the two output drive shafts are respectively coupled to one of the first and second wheels,
wherein the second single planetary gear set has a second sun gear connected to the differential input shaft for conjoint rotation, and
wherein the second switch element is configured to connect two of three transmission elements of the second single planetary gear set.

10. An electric drive device for a motor vehicle, the electric drive device comprising:
a housing;
an electric engine having a rotor and configured to drive the motor vehicle;
a planetary transmission, at least partially arranged in the housing, comprising
a first planetary gear set comprising a first sun gear connected to the rotor for conjoint rotation, a first planetary carrier, and a first annular gear, and
a second planetary gear set comprising a second planetary carrier connected to the first planetary carrier for conjoint rotation, a second sun gear, and a second annular gear, wherein first planetary gears are rotatably mounted on the first planetary carrier, and respectively interlock directly with the first sun gear and the first annular gear, wherein second planetary gears are rotatably mounted on the second planetary carrier and respectively interlock directly with the second sun gear and the second annular gear;

at least two switch elements, which includes a first switch element and a second switch element, configured to switch at least two gears; and
a differential having a differential input shaft and two output drive shafts,
wherein the second sun gear is connected to the differential input shaft for conjoint rotation, and
wherein the second switch element is configured to connect two of three transmission elements of the second single planetary gear set.

11. The motor vehicle of claim 9 , wherein the first switch element is configured to connect the second annular gear to the housing for conjoint rotation.

12. The motor vehicle of claim 9 , wherein the second switch element has a claw coupling and a freewheel coupling arranged in parallel with the claw coupling.

13. The motor vehicle of claim 9 , wherein the two of the three transmission elements of the second single planetary gear set include the second sun gear and the second annular gear, and the second switch element is configured to connect the second sun gear to the second annular gear for conjoint rotation.

14. The motor vehicle of claim 9 , wherein the first annular gear is permanently connected to the housing for conjoint rotation.

15. The motor vehicle of claim 9 , wherein the second single planetary gear set is arranged axially overlapping the differential.

16. The electric drive device of claim 10 , wherein the first switch element is configured to connect the second annular gear to the housing for conjoint rotation.

17. The electric drive device of claim 10 , wherein the second switch element has a claw coupling and a freewheel coupling arranged in parallel with the claw coupling.

18. The electric drive device of claim 10 , wherein the two of the three transmission elements of the second single planetary gear set include the second sun gear and the second annular gear, and the second switch element is configured to connect the second sun gear to the second annular gear for conjoint rotation.

19. The electric drive device of claim 10 , wherein the first annular gear is permanently connected to the housing for conjoint rotation.

20. The electric drive device of claim 10 , wherein the second single planetary gear set is arranged axially overlapping the differential.

Assignees

• Mercedes Benz Group Ag

Inventors

• Schilder Tobias
• Gansloser Philip

Classifications

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title

• B60K2001/001

  one motor mounted on a propulsion axle for rotating right and left wheels of this axle · CPC title

• B60K17/08

  of mechanical type · CPC title

• B60K1/00

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title