Drive unit for a vehicle

Patent metadata

Field	Value
Publication number	US-12441171-B2
Application number	US-202418743713-A
Country	US
Kind code	B2
Filing date	Jun 14, 2024
Priority date	Jun 16, 2023
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A drive unit for a vehicle includes an electric machine and a manual gearbox with at least a first shift element, a second shift element, a third shift element and two planetary gear sets coupled to one another and each having a sun shaft, a hollow gear shaft, and a web shaft. The second hollow gear shaft is connected rotationally fixed to the first web shaft. The first sun shaft is connected to a stationary component. In the respective actuated states, the first shift element locks the first planetary gear set to shift a first gear, the second shift element connects the first hollow gear shaft to the second web shaft to shift a second gear, and the third shift element connects the first hollow gear shaft to the second sun shaft to shift a third gear.

First claim

The invention claimed is:

1. A drive unit for a vehicle, comprising:
an electric machine; and
a manual gearbox with at least a first shift element, a second shift element, a third shift element, and two planetary gear sets coupled to one another;
wherein:
the first planetary gear set has a first sun shaft, a first hollow gear shaft, and a first web shaft;
the second planetary set comprises a second sun shaft, a second hollow gear shaft, and a second web shaft;
the second sun shaft is actuatable by the electric machine;
the second hollow gear shaft is connected to the first web shaft in a rotationally fixed manner;
the first sun shaft is connected to a stationary component in a rotationally fixed manner
the first shift element, in an actuated state, locks the first planetary gear set in order to shift a first gear;
the first element, in the actuated state, connects the first hollow gear shaft to the first web shaft in a rotationally fixed manner in order to shift the first gear;
the second shift element, in an actuated state, connects the first hollow gear shaft to the second web shaft in a rotationally fixed manner in order to shift a second gear; and
the third shift element, in an actuated state, connects the first hollow gear shaft to the second sun shaft in a rotationally fixed manner in order to shift a third gear.

2. The drive unit for a vehicle according to claim 1 , wherein the second web shaft is configured as the output of the manual gearbox.

3. The drive unit for a vehicle according to claim 1 , wherein the manual gearbox has a fourth shift element.

4. The drive unit according to claim 3 , comprising a sliding sleeve arranged on the first hollow gear shaft in a rotationally fixed manner.

5. The drive unit according to claim 1 , wherein the first shift element, the second shift element, and the third shift element are combined to form a shift unit with five shift positions, and wherein the shift unit has a single sliding sleeve which is axially movable.

6. The drive unit according to claim 1 , wherein all shift elements are configured as interlocking shift elements.

7. The drive unit according to claim 1 , further comprising:
a differential with a differential input shaft connected to the second web shaft; and
two differential output shafts.

8. The drive unit according to claim 7 , wherein the differential is configured as an integral differential with a first planetary gear set and a second planetary gear set.

9. The drive unit according to claim 1 , further having a third planetary gear set configured as a constant transmission stage with a third sun shaft, a third hollow gear shaft, and a third web shaft.

10. The drive unit according to claim 9 , wherein the third planetary gear set is arranged at least partially radially within the electric machine.

11. A vehicle comprising at least one drive unit according to claim 1 .

12. A drive unit for a vehicle, comprising:
an electric machine; and
a manual gearbox with at least a first shift element, a second shift element, a third shift element, and two planetary gear sets coupled to one another;
wherein:
the first planetary gear set has a first sun shaft, a first hollow gear shaft, and a first web shaft;
the second planetary set comprises a second sun shaft, a second hollow gear shaft, and a second web shaft;
the second sun shaft is actuatable by the electric machine;
the second hollow gear shaft is connected to the first web shaft in a rotationally fixed manner;
the first sun shaft is connected to a stationary component in a rotationally fixed manner
the first shift element, in an actuated state, locks the first planetary gear set in order to shift a first gear;
the second shift element, in an actuated state, connects the first hollow gear shaft to the second web shaft in a rotationally fixed manner in order to shift a second gear; and
the third shift element, in an actuated state, connects the first hollow gear shaft to the second sun shaft in a rotationally fixed manner in order to shift a third gear; and
wherein the first shift element, in the actuated state, connects the first hollow gear shaft to the stationary component in a rotationally fixed manner in order to shift the first gear.

13. A drive unit for a vehicle, comprising:
an electric machine; and
a manual gearbox with at least a first shift element, a second shift element, a third shift element, a fourth shift element, and two planetary gear sets coupled to one another;
wherein:
the first planetary gear set has a first sun shaft, a first hollow gear shaft, and a first web shaft;
the second planetary set comprises a second sun shaft, a second hollow gear shaft, and a second web shaft;
the second sun shaft is actuatable by the electric machine;
the second hollow gear shaft is connected to the first web shaft in a rotationally fixed manner;
the first sun shaft is connected to a stationary component in a rotationally fixed manner
the first shift element, in an actuated state, locks the first planetary gear set in order to shift a first gear;
the first element, in the actuated state, connects the first hollow gear shaft to the first web shaft in a rotationally fixed manner in order to shift the first gear;
the second shift element, in an actuated state, connects the first hollow gear shaft to the second web shaft in a rotationally fixed manner in order to shift a second gear; and
the third shift element, in an actuated state, connects the first hollow gear shaft to the second sun shaft in a rotationally fixed manner in order to shift a third gear; and
wherein the fourth shift element, in an actuated state, connects the first web shaft to the second sun shaft in a rotationally fixed manner in order to shift a fourth gear.

14. The drive unit according to claim 13 , wherein the first shift element, the second shift element, the third shift element, and the fourth shift element form a shift unit with seven shift positions, and wherein the shift unit has a single sliding sleeve which is axially movable.

15. The drive unit according to claim 14 , wherein the shift unit comprises a neutral position between two gear positions of the seven shift positions.

16. The drive unit according to claim 15 , wherein the shift unit is arranged at least partially radially within the electric machine.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes
• Martin Thomas
• Kutter Fabian
• Glückler Johannes
• Bornträger Kai
• Renner Stefan

Classifications

• F16H2200/0043

  the gear ratios comprising four forward speeds · CPC title

• F16H2200/0039

  the gear ratios comprising three forward speeds · CPC title

• F16H2200/2097

  comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing · CPC title

• F16H2200/201

  with three sets of orbital gears · CPC title

• B60K2001/001

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