Shaft connection

Patent metadata

Field	Value
Publication number	US-12420912-B2
Application number	US-202418420029-A
Country	US
Kind code	B2
Filing date	Jan 23, 2024
Priority date	Jan 24, 2023
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

Shaft connection ( 1 ) having a first shaft ( 5 ) which is rotatable about an axis of rotation ( 3 ), a second shaft ( 7 ) which is arranged coaxially with the first shaft ( 5 ) and which is movable axially relative to the first shaft ( 5 ), and at least one spring element pair ( 9 ), in each case having a first spring element ( 11 ) and a second spring element ( 13 ), wherein the first spring element ( 11 ) and the second spring element ( 13 ) are each fastened to the first shaft ( 5 ) and to the second shaft ( 7 ), and wherein the first spring element ( 11 ) and the second spring element ( 13 ) are arranged axially offset relative to one another.

First claim

The invention claimed is:

1. Shaft connection ( 1 ) comprising
a first shaft ( 5 ) which is rotatable about an axis of rotation ( 3 ),
a second shaft ( 7 ) which is arranged coaxially with the first shaft ( 5 ) and which is movable axially relative to the first shaft ( 5 ), and
at least one spring element pair ( 9 ), in each case comprising a first spring element ( 11 ) and a second spring element ( 13 ),
wherein the first spring element ( 11 ) and the second spring element ( 13 ) are each fastened to the first shaft ( 5 ) and to the second shaft ( 7 ), and wherein the first spring element ( 11 ) and the second spring element ( 13 ) are arranged axially offset relative to one another, wherein the first spring element ( 11 ) and the second spring element ( 13 ) are arranged in a crossed manner.

2. Shaft connection ( 1 ) according to claim 1 , wherein the first shaft ( 5 ) and the second shaft ( 7 ) are arranged one behind the other in an axial direction.

3. Shaft connection ( 1 ) according to claim 1 , wherein the first spring element ( 11 ) and the second spring element ( 13 ) are each in the form of a leaf spring.

4. Shaft connection ( 1 ) according to claim 3 , wherein the leaf spring is oriented at least substantially parallel to a plane orthogonal to the axis of rotation ( 3 ).

5. Shaft connection ( 1 ) according to claim 3 , wherein the leaf spring is of arcuate form.

6. Shaft connection ( 1 ) according to claim 3 , wherein the leaf spring extends substantially in a circumferential direction about the axis of rotation ( 3 ).

7. Shaft connection ( 1 ) according to claim 1 , comprising at least two spring element pairs ( 9 ), wherein the at least two spring element pairs ( 9 ) are arranged distributed in the circumferential direction about the axis of rotation ( 3 ).

8. Shaft connection ( 1 ) according to claim 1 , wherein the first spring element ( 11 ) and the second spring element ( 13 ) each extend over the same angular range about the axis of rotation ( 3 ).

9. Shaft connection ( 1 ) according to claim 1 , wherein the first spring element ( 11 ) and the second spring element ( 13 ) each have a fastening position on a first circle ( 27 ) about the axis of rotation ( 3 ) on the first shaft ( 5 ), and wherein the first spring element ( 11 ) and the second spring element ( 13 ) each have a further fastening position on a second circle ( 29 ) about the axis of rotation ( 3 ) on the second shaft ( 7 ), and wherein the first circle ( 27 ) has a different radius than the second circle ( 29 ).

10. Shaft connection ( 1 ) according to claim 1 , wherein the second shaft ( 7 ) has a toothing ( 17 ).

11. Shaft connection ( 1 ) according to claim 1 , wherein the first shaft ( 5 ) and/or the second shaft ( 7 ) are/is of circular-ring-shaped form.

12. Coupling ( 41 ) comprising
a shaft connection ( 1 ) according to claim 1 , and
a rotor shaft ( 43 ) arranged coaxially with the first shaft ( 5 ) and the second shaft ( 7 ),
wherein, for the coupling of the first shaft ( 5 ) and the second shaft ( 7 ) to the rotor shaft ( 43 ), the coupling ( 41 ) is configured to move the second shaft ( 7 ) axially in the direction of the rotor shaft ( 43 ).

13. Coupling ( 41 ) according to claim 12 , wherein the second shaft ( 7 ) has a first toothing ( 45 ), and wherein the rotor shaft ( 43 ) has a second toothing ( 47 ) configured to engage with the first toothing ( 45 ).

14. Coupling ( 41 ) according to claim 12 , further comprising an electromagnet ( 49 ) configured to move the second shaft ( 7 ) counter to a restoring force of the at least one spring element pair ( 9 ) from a first axial position to a second axial position.

15. Shaft connection ( 1 ) according to claim 1 , wherein the first spring element and the second spring element cross in a view along the axis of rotation.

Assignees

• Wittenstein Se

Inventors

• Eck Alexander
• Seitz Nikolai

Classifications

• F16D11/14

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16D3/72

  with axially-spaced attachments to the coupling parts (F16D3/56 takes precedence) · CPC title

• F16D3/62

  the links or their attachments being elastic · CPC title

• B64C13/30 Primary

  using cable, chain, or rod mechanisms · CPC title

• F16D3/06 Primary

  specially adapted to allow axial displacement · CPC title