Transmission, drive train and vehicle comprising transmission

Patent metadata

Field	Value
Publication number	US-12083879-B2
Application number	US-202017771753-A
Country	US
Kind code	B2
Filing date	Oct 22, 2020
Priority date	Oct 25, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A transmission may include an input shaft, a first output shaft, a second output shaft, a first planetary gearset, and a second planetary gearset connected to the first planetary gearset, where the planetary gearsets each comprise numerous elements. The input shaft, the two output shafts, the planetary gearsets, and their elements may be arranged and designed such that a torque input via the input shaft is converted and distributed in a defined ratio to the two output shafts, and the formation of a combined torque is prevented. At least a third element of the first planetary gearset may be connected to a first element of the second planetary gearset via a shaft for conjoint rotation.

First claim

The invention claimed is:

1. A transmission comprising:
an input shaft,
a first output shaft,
a second output shaft, a first planetary gearset, and
a second planetary gearset connected to the first planetary gearset,
wherein the input shaft, the first and second output shafts, the first and second planetary gearsets are arranged and designed such that:
a torque input via the input shaft is converted and distributed in a defined ratio to the first and second output shafts, and
formation of a combined torque is prevented,
wherein at least a third element of the first planetary gearset is connected to a first element of the second planetary gearset with a shaft for conjoint rotation, and
a second element of the second planetary gearset is fixed in place on a non-rotating component,
wherein the shaft is positioned axially on at least one planet gear of one of the first and second planetary gearsets, and
wherein an axial positioning of the shaft is obtained via at least one thrust element in a form of a thrust collar such that an axial support of the shaft is obtained through thrust applied to the at least one planet gear of one of the first and second planetary gearsets.

2. The transmission according to claim 1 , wherein
the input shaft is connected to a first element of the first planetary gearset for conjoint rotation;
the first output shaft is connected to a second element of the first planetary gearset for conjoint rotation; and
the second output shaft is connected to a third element of the second planetary gearset for conjoint rotation.

3. The transmission according to claim 1 , wherein a pitch of a gearing of the third element of the first planetary gearset and a pitch of a gearing of the first element of the second planetary gearset have a same value and a same sign.

4. The transmission according to claim 1 , wherein the shaft is positioned axially exclusively on at least one planet gear.

5. The transmission according to claim 1 , wherein a radial support of the shaft is obtained exclusively by at least one planet gear in one of the first and second planetary gearsets.

6. The transmission according to claim 1 , wherein there are no further shaft connections on the shaft, such that a torque from a first number of planet gears in the first planetary gearset input to the third element of the first planetary gearset is also conducted via the first element of the second planetary gearset to a second number of planet gears in the second planetary gearset.

7. The transmission according to claim 1 , wherein the thrust element is located on
the third element of the first planetary gearset, or
the first element of the second planetary gearset, or
at least one planet gear of the first planetary gearset, or
at least one planet gear of the second planetary gearset.

8. The transmission according to claim 1 , wherein the thrust element is located on
an inner gearing of one of the third elements of one of the two planetary gearsets, or
an outer gearing
of the first element of one of the two planetary gearsets, or
a planet gear of one of the two planetary gearsets.

9. The transmission according to claim 8 , wherein the third element is a ring gear, and the first element is a sun gear.

10. The transmission according to claim 8 , wherein the thrust element has gear teeth, designed such that it can be slid over or through corresponding gear teeth.

11. The transmission according to claim 1 , wherein the thrust element is twisted in an operating situation in relation to a corresponding gear teeth and in relation to an assembly position in a groove to a defined extent.

12. The transmission according to claim 1 , wherein a twisting back of the thrust element is prevented by a collar component in a groove in the thrust element.

13. The transmission according to claim 1 , wherein the thrust element is axially secured in place by a locking washer or snap ring.

14. The transmission according to claim 1 , wherein the thrust element is cylindrical on a side where associated gear teeth are located.

15. The transmission according to claim 1 , wherein the thrust element is secured against twisting in associated gear teeth.

16. The transmission according to claim 1 , wherein the thrust element has
a conical thrust surface on at least one side, or
a flat thrust surface on at least one side.

17. The transmission according to claim 1 , wherein the thrust element forms a snap ring.

18. The transmission according to claim 1 , wherein an element that is designed to bear against the thrust element is conical or cambered on a thrust surface.

19. A drive train that has a transmission according to claim 1 .

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Reisch Matthias
• Beck Stefan

Classifications

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title

• F16H37/082

  and additional planetary reduction gears · CPC title

• F16H3/52

  comprising orbital spur gears · CPC title

• B60K17/3467

  combined with a change speed gearing, e.g. range gear · CPC title