Axle drive

Patent metadata

Field	Value
Publication number	US-11255419-B2
Application number	US-201816633846-A
Country	US
Kind code	B2
Filing date	Jun 19, 2018
Priority date	Jul 25, 2017
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

An axle drive, comprising a drive shaft, a first output shaft and a second output shaft, a first planetary gear mechanism and a second planetary gear mechanism, it being possible for a drive torque of the drive shaft to be transmitted by means of the first planetary gear mechanism and the second planetary gear mechanism to the first and second output shaft, wherein the second planetary gear mechanism is configured radially on the outside coaxially around the first planetary gear mechanism, the internal gear of the first planetary gear mechanism forming the sun gear of the second planetary gear mechanism.

First claim

What is claimed is:

1. An axle drive, comprising a drive shaft, a first output shaft and a second output shaft, a first planetary gear mechanism and a second planetary gear mechanism, wherein the first planetary gear mechanism and the second planetary gear mechanism are configured to transmit a drive torque of the drive shaft to the first and second output shafts,
wherein the second planetary gear mechanism is positioned radially on an outside of the first planetary gear mechanism and coaxially around the first planetary gear mechanism, and wherein an internal gear of the first planetary gear mechanism forms a sun gear of the second planetary gear mechanism;
wherein the internal gear of the first planetary gear mechanism has a radially outer side and a radially inner side opposite the radially outer side, and wherein the radially outer side and the radially inner side of the internal gear of the first planetary gear mechanism each present helical teeth such that axial forces on the internal gear of the first planetary gear mechanism are compensated for, and such that the internal gear of the first planetary gear mechanism is guided radially by way of the helical teeth of the radially outer side and the radially inner side,
wherein the internal gear of the first planetary gear mechanism is guided axially by way of two sliding guides.

2. An axle drive according to claim 1 , wherein the internal gear of the first planetary gear mechanism rotates counter to a rotational direction of the first and second output shaft.

3. An axle drive according to claim 1 , wherein the drive shaft drives or functions as a sun gear of the first planetary gear mechanism.

4. An axle drive according to claim 1 , wherein a planetary carrier of the first planetary gear mechanism functions as an output to the first output shaft.

5. An axle drive according to claim 1 , wherein an internal gear of the second planetary gear mechanism functions as an output to the second output shaft.

6. An axle drive according to claim 1 , wherein planets of the second planetary gear mechanism are mounted fixedly on a housing.

7. An axle drive according to claim 1 , wherein the drive shaft is a hollow shaft, and the first output shaft is arranged radially inside the drive shaft.

8. An axle drive according to claim 1 , wherein the second output shaft is partially axially aligned with, and extends annularly about the first output shaft.

9. An axle drive, comprising a drive shaft, a first output shaft and a second output shaft, a first planetary gear mechanism and a second planetary gear mechanism, wherein the first planetary gear mechanism and the second planetary gear mechanism are configured to transmit a drive torque of the drive shaft to the first and second output shafts;
wherein the second planetary gear mechanism is positioned radially on an outside of the first planetary gear mechanism and coaxially around the first planetary gear mechanism, and wherein an internal gear of the first planetary gear mechanism forms a sun gear of the second planetary gear mechanism;
wherein the internal gear of the first planetary gear mechanism has a radially outer side and a radially inner side opposite the radially outer side, and wherein at least one of the radially outer side and the radially inner side presents helical teeth for compensating for axial forces applied against the internal gear;
wherein at least one bearing is arranged radially between the first and the second output shafts.

10. An axle drive according to claim 9 wherein the at least one bearing includes at least one needle bearing.

11. An axle drive for a vehicle, comprising:
a drive shaft;
a first output shaft;
a first planetary gear mechanism configured to transmit torque from the drive shaft to the first output shaft;
a second output shaft,
a second planetary gear mechanism configured to transmit torque from the drive shaft to the second output shaft;
the second planetary gear mechanism located radially outside of, and coaxially about the first planetary gear mechanism;
the first planetary gear mechanism including an internal gear that also functions as a sun gear of the second planetary gear mechanism;
the internal gear of the first planetary gear mechanism having a radially outer side and a radially inner side opposite the radially outer side, and wherein at least one of the radially outer side and the radially inner side presents helical teeth for compensating for axial forces applied against the internal gear; and
wherein the second output shaft is partially axially aligned with, and extends annularly about the first output shaft.

12. An axle drive according to claim 11 , wherein the internal gear of the first planetary gear mechanism rotates counter to a rotational direction of the first and second output shafts.

13. An axle drive according to claim 11 , wherein the radially outer side and the radially inner side of the internal gear of the first planetary gear mechanism each present helical teeth such that axial forces on the internal gear of the first planetary gear mechanism are compensated for, and wherein the internal gear of the first planetary gear mechanism is guided axially by way of two sliding guides and guided radially by way of the helical teeth of the radially outer side and the radially inner side of the internal gear.

14. An axle drive according to claim 11 , wherein the drive shaft drives or functions as a sun gear of the first planetary gear mechanism.

15. An axle drive according to claim 11 , wherein a planetary carrier of the first planetary gear mechanism functions as an output to the first output shaft.

16. An axle drive according to claim 11 , wherein an internal gear of the second planetary gear mechanism functions as an output to the second output shaft.

17. An axle drive according to claim 11 , wherein at least one bearing is arranged between the first and the second output shaft.

18. An axle drive according to claim 17 , wherein the at least one bearing includes at least one needle bearing.

Assignees

• Magna powertrain gmbh & co kg

Inventors

• Lindtner Werner

Classifications

• F16H48/10 Primary

  with orbital spur gears · CPC title

• F16H1/46

  Systems consisting of a plurality of gear trains each with orbital gears, {i.e. systems having three or more central gears} · CPC title

• F16H57/08

  of gearings with members having orbital motion · CPC title

• F16H2048/104

  characterised by two ring gears · CPC title

• F16H48/22

  using friction clutches or brakes · CPC title