Coupling element and gearing with coupling element

Patent metadata

Field	Value
Publication number	US-12480577-B2
Application number	US-202418967250-A
Country	US
Kind code	B2
Filing date	Dec 3, 2024
Priority date	Dec 4, 2023
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A coupling element (30) includes an internal toothing and a cutout (32). The coupling element (30) is configured for coupling a first gear set and a second gear set of a gearing. The first gear set includes at least one first ring gear (15). The coupling element (30) forms the first ring gear (15) on an inner circumference via the internal toothing. The coupling element (30) is formed in an annular manner. At least one cutout (32) is formed on at least one first end region in an axial direction.

First claim

The invention claimed is:

1 . A coupling element ( 30 ), comprising:
an internal toothing; and a cutout ( 32 ), wherein the coupling element ( 30 ) is configured for coupling a first gear set and a second gear set of a gearing, the first gear set comprising a first ring gear ( 15 ), the coupling element ( 30 ) forms the first ring gear ( 15 ) on an inner circumference of the coupling element ( 30 ) via the internal toothing, wherein the coupling element ( 30 ) is formed in an annular manner, and the cutout ( 32 ) is formed at a first end region of the coupling element ( 30 ) in an axial direction, and wherein an oil chamber ( 33 ) is formed by the coupling element ( 30 ), the cutout ( 32 ) enabling an oil flow out of the oil chamber ( 33 ) in the axial direction.

2 . The coupling element ( 30 ) of claim 1 , further comprising an external toothing on an outer circumference of the coupling element ( 30 ).

3 . The coupling element ( 30 ) of claim 2 , wherein:
the second gear set comprises a second spur gear; and the coupling element ( 30 ) forms the second spur gear on the outer circumference via the external toothing.

4 . The coupling element ( 30 ) of claim 1 , wherein a circumferential groove ( 31 ) is formed at the first end region and at the inner circumference of the coupling element ( 30 ).

5 . The coupling element ( 30 ) of claim 4 , wherein the cutout ( 32 ) extends from the circumferential groove ( 31 ) in the axial direction through the coupling element ( 30 ) to an outer side of the coupling element ( 30 ).

6 . The coupling element ( 30 ) of claim 4 , wherein:
the oil chamber ( 33 ) is formed at the inner circumference of the coupling element ( 30 ); the oil chamber ( 33 ) is delimited in the axial direction by a delimiting surface; and the circumferential groove ( 31 ) at least partially forms the delimiting surface.

7 . The coupling element ( 30 ) of claim 6 , wherein:
the oil chamber ( 33 ) is in fluid communication with the cutout ( 32 ); and the cutout ( 32 ) is configured for receipt of the oil flow out of the oil chamber ( 33 ) in the axial direction.

8 . The coupling element ( 30 ) of claim 1 , wherein the cutout ( 32 ) is formed via a through hole.

9 . The coupling element ( 30 ) of claim 1 , wherein the cutout ( 32 ) is one of a plurality of cutouts ( 32 ).

10 . The coupling element ( 30 ) of claim 1 , wherein:
the coupling element ( 30 ) further comprises a securing element ( 40 ); the securing element ( 40 ) is configured at least indirectly for relative positioning of the coupling element ( 30 ) and a first spur gear of the first gear set in the axial direction; the first spur gear is configured for engagement with the first ring gear ( 15 ); and a surface of the securing element ( 40 ) least partially forms a delimiting surface of the oil chamber ( 33 ) along the axial direction.

11 . The coupling element ( 30 ) of claim 10 , wherein the cutout ( 32 ) extends through the securing element ( 40 ).

12 . The coupling element ( 30 ) of claim 10 , wherein:
the coupling element ( 30 ) further comprises a thrust washer ( 50 ); the thrust washer ( 50 ) is configured for relative positioning of the coupling element ( 30 ) and the first spur gear between the coupling element ( 30 ) and the first spur gear; and a surface of the thrust washer ( 50 ) at least partially forms the delimiting surface of the oil chamber ( 33 ) in the axial direction.

13 . The coupling element ( 30 ) of claim 12 , wherein the cutout ( 32 ) extends through the thrust washer ( 50 ).

14 . A gearing, comprising:
the first gear set; the second gear set; and the coupling element ( 30 ) of claim 1 , wherein the first gear set comprises the first ring gear ( 15 ), and the second gear set comprises a second spur gear.

15 . The gearing of claim 14 , wherein:
the first gear set is formed by a first planetary gear set ( 10 ) that comprises a first sun gear ( 11 ), a first planet carrier ( 12 ), a first planetary gear ( 14 ), and the first ring gear ( 15 ); and the first planetary gear ( 14 ) forms a first spur gear, the first sun gear ( 11 ) is in engagement with the first planetary gear ( 14 ), and the first planetary gear ( 14 ) is in engagement with the first ring gear ( 15 ).

16 . The gearing of claim 14 , wherein:
the second gear set is formed by a second planetary gear set ( 20 ) that comprises a second sun gear ( 21 ), a second planet carrier ( 22 ), a second planetary gear ( 24 ), and a second ring gear; and the second sun gear ( 21 ) forms the second spur gear, the second sun gear ( 21 ) is in engagement with the second planetary gear ( 24 ), and the second planetary gear ( 24 ) is in engagement with the second ring gear.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Dötschel Philip

Classifications

• F16H57/08 Primary

  of gearings with members having orbital motion · CPC title

• F16H57/0479

  Gears or bearings on planet carriers · CPC title

• F16H57/0486

  with fixed gear ratio  (axle or inter-axle differentials F16H57/0483) · CPC title

• F16H57/04

  Features relating to lubrication or cooling {or heating} (control of lubrication or cooling in hydrostatic gearing F16H61/4165) · CPC title

• F16H57/037

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