Drive device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-8968138-B2
Application number	US-201313862976-A
Country	US
Kind code	B2
Filing date	Apr 15, 2013
Priority date	Apr 16, 2012
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A drive device for a vehicle includes at least one electric machine having at least one rotor element which is configured to delimit an installation area in a radial direction, and an active rotor part which is operably connected to the rotor element and has a ring structure to guide a magnetic flux of the electric machine. At least one transmission device is disposed, at least partly, in the installation area and configured to be driven by the electric machine via the rotor element.

First claim

What is claimed is:

1. A drive device for a motor vehicle, comprising:
at least one electric machine having at least one rotor element which includes an essentially sleeve-shaped rotor carrier to delimit, at least partly, an installation area in a radial direction; and
at least one transmission device disposed in a transmission housing and, at least partly, in the installation area and configured to be driven by the electric machine via the rotor element,
wherein the transmission device comprises a plurality of transmission stages disposed at least partly in the installation area, and
wherein the transmission housing on one of its sides, as considered in an axial direction, is radially supported exclusively on the transmission stages.

2. The drive device of claim 1 , wherein the rotor element comprises:
an active rotor part held on the rotor carrier for guiding a magnetic flux of the electric machine, said active rotor part and said rotor carrier being linked to each other by a positive fit or non-positive fit.

3. The drive device of claim 1 , wherein the rotor element and the transmission device are disposed, at least partly, coaxially to one another.

4. The drive device of claim 1 , wherein the transmission device comprises a differential gear.

5. The drive device of claim 4 , wherein the transmission device comprises at least one transmission stage configured to be driven by the electric machine, said differential gear configured to be driven via the transmission stage and the rotor element by the electric machine.

6. The drive device of claim 1 , wherein the transmission transmission stages are disposed entirely in the installation area.

7. The drive device of claim 4 , wherein the transmission stages are connected in series with one another to thereby define a first transmission stage and a last transmission stage, said differential gear being configured to be driven via the last transmission stage.

8. The drive device of claim 4 , wherein the transmission stages comprise a first transmission stage configured as a planetary gear, and a second transmission stages configured as a second planetary gear which is being driven by the first planetary gear and via which the differential gear is being driven.

9. The drive device of claim 8 , wherein the rotor carrier is linked to a sun wheel of the first planetary gear, said first planetary gear having a first planetary carrier which is linked to a sun wheel of the second planetary gear, said second planetary gear having a second planetary carrier which is linked to the differential gear.

Assignees

• Siemens Ag

Inventors

• Kalmbach Klaus
• Schleicher Klaus
• Steinz Janina

Classifications

• F16H48/00

  Differential gearings (cooling or lubricating of differential gearing F16H57/04) · CPC title

• F16H2057/02034

  Gearboxes combined or connected with electric machines · CPC title

• F16H57/037 Primary

  Gearboxes for accommodating differential gearings (rotating cases for differential gearings F16H48/40) · CPC title

• H02K7/14 Primary

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K7/116

  with gears · CPC title