Device for transmitting compressed air or control and/or working pressures in a cardan shaft arrangement

Patent metadata

Field	Value
Publication number	US-12533915-B2
Application number	US-202217865669-A
Country	US
Kind code	B2
Filing date	Jul 15, 2022
Priority date	Jul 21, 2021
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A rotation transmission apparatus for transmitting control and/or working pressures to a fluid channel, which is at least regionally configured or accommodated on or in a shaft, in particular a drive shaft, wherein the rotation transmission apparatus includes a stator assembly, which is arranged such that it is stationary relative to a rotational movement of the shaft and has at least one fluid supply/discharge line, wherein the fluid supply/discharge opens into an annular space which surrounds the shaft at least partially and with which the fluid channel of the shaft is fluidically connected via a branch channel, wherein the annular space is associated with sealing elements, which are arranged and configured in the annular space at least partially such that they seal the annular space from the outside atmosphere when a previously defined or definable overpressure is applied in the annular space.

First claim

The invention claimed is:

1 . A rotation transmission apparatus for transmitting control and/or working pressures to a fluid channel, which is configured or accommodated on or in a shaft, wherein the rotation transmission apparatus comprises:
a stator assembly which is arranged such that the stator assembly is stationary relative to a rotational movement of the shaft and has at least one fluid supply/discharge line, wherein the fluid supply/discharge line opens into an annular space which surrounds the shaft at least partially and with which the fluid channel of the shaft is fluidically connected by a branch channel, wherein the annular space has associated sealing elements which are arranged and configured in the annular space at least partially such that the sealing elements seal the annular space from the outside atmosphere when a previously defined or definable overpressure is applied in the annular space, wherein the shaft is coupled to the stator assembly using a bearing assembly such that the shaft can rotate relative to the stator assembly.

2 . The rotation transmission apparatus according to claim 1 , wherein the sealing elements comprise at least one radial shaft sealing ring having a radially arranged sealing lip or sealing disc, for sealing the annular space.

3 . The rotation transmission apparatus according to claim 2 , wherein the at least one radial shaft sealing ring comprises an outer region facing the stator assembly and an inner region facing the shaft, wherein the radial shaft sealing ring is connected to the stator assembly by a clamping connection.

4 . The rotation transmission apparatus according to claim 3 , wherein the inner region or the radial shaft sealing ring facing the shaft is configured as a sealing lip or sealing disc which extends radially around the shaft and bears against a sealing sleeve fastened to the shaft.

5 . The rotation transmission apparatus according to claim 4 , wherein the sealing sleeve has a sealing geometry, wherein the sealing geometry comprises at least one region which extends radially around the shaft and projects or protrudes in the direction of the annular space.

6 . The rotation transmission apparatus according to claim 4 , wherein the sealing lip or sealing disc is arranged in the annular space such that, when the annular space is unpressurized, the sealing lip or sealing disc has no contact with the sealing geometry of the sealing sleeve or only bears against the sealing geometry of the sealing sleeve of the shaft in a way such that, upon rotation of the shaft relative to the stator assembly, the sealing sleeve can slide over the sealing lip or sealing disc without resistance or at least substantially without resistance.

7 . The rotation transmission apparatus according to claim 4 , wherein the sealing lip or sealing disc is arranged in the annular space such that, when overpressure is applied in the annular space, the sealing lip or sealing disc bears against the sealing geometry of the sealing sleeve of the shaft in a sealing manner.

8 . The rotation transmission apparatus according to claim 4 , wherein the sealing lip or sealing disc is configured such that the sealing lip or sealing disc returns to an at least substantially contact-free state when a previously set overpressure in the annular space is released again.

9 . The rotation transmission apparatus according to claim 4 , wherein the sealing sleeve is pushed onto the shaft and is releasably connected to the shaft in the region of the stator assembly, wherein sealing elements, in the form of at least one O-ring provided for sealing the connection between the sealing sleeve and the shaft.

10 . The rotation transmission apparatus according to claim 1 , wherein the stator assembly comprises a housing which at least partially surrounds the shaft and in which a bearing assembly is accommodated.

11 . The rotation transmission apparatus according to claim 1 , wherein the stator assembly comprises a clamping ring or fastening assembly for releasably fastening the sealing elements to the stator assembly.

12 . The rotation transmission apparatus according to claim 11 , wherein sealing elements, in the form of at least one O-ring, are associated with the clamping ring or fastening assembly for sealing a fastening region of the sealing elements.

13 . The rotation transmission apparatus according to claim 1 , further comprising a shaft on which the rotation transmission apparatus is fastened, wherein the shaft is as a drive shaft of a vehicle.

14 . A rotation transmission apparatus for transmitting control and/or working pressures to a fluid channel, which is configured or accommodated on or in a shaft, wherein the rotation transmission apparatus comprises:
a stator assembly which is arranged such that the stator assembly is stationary relative to a rotational movement of the shaft and has at least one fluid supply/discharge line, wherein the fluid supply/discharge line opens into an annular space which surrounds the shaft at least partially and with which the fluid channel of the shaft is fluidically connected by a branch channel, wherein the annular space has associated sealing elements which are arranged and configured in the annular space at least partially such that the sealing elements seal the annular space from the outside atmosphere when a previously defined or definable overpressure is applied in the annular space,
wherein the sealing elements comprise at least one radial shaft sealing ring having a radially arranged sealing lip or sealing disc, for sealing the annular,
wherein the at least one radial shaft sealing ring comprises an outer region facing the stator assembly and an inner region facing the shaft, wherein the radial shaft sealing ring is connected to the stator assembly by a clamping connection,
wherein the inner region of the radial shaft sealing ring facing the shaft is configured as a sealing lip or sealing disc which extends radially around the shaft and bears against a sealing sleeve fastened to the shaft,
wherein the sealing sleeve has a sealing geometry, wherein the sealing geometry comprises at least one region which extends radially around the shaft and projects or protrudes in the direction of the annular space, and
wherein the sealing lip or sealing disc is arranged in the annular space such that, when the annular space is unpressurized, the sealing lip or sealing disc has no contact with the sealing geometry of the sealing sleeve or only bears against the sealing geometry of the sealing sleeve of the shaft in a way such that, upon rotation of the shaft relative to the stator assembly, the sealing sleeve can slide over the sealing lip or sealing disc without resistance or at least substantially without resistance.

15 . A rotation transmission apparatus for transmitting control and/or working pressures to a fluid channel, the rotation transmission apparatus comprising:
a stator assembly arranged such that the stator assembly is stationary relative to a rotational movement of a shaft and has at least one fluid supply/discharge line,
wherein the fluid supply/discharge line is opens into an annular space that surrounds the shaft at least partially and with which the fluid channel of the shaft is fluidically connected by a branch channel, and
wherein sealing elements are arranged and configured in the annular space at least partially such that the sealing elements seal the annular space from the outside atmosphere when a previously defined or definable overpressure is applied in the annular space; and
a bearing assembly by which the shaft is coupled to the stat

Assignees

• Illinois Tool Works
• Kt Projektentwicklungs Gmbh

Inventors

• Spindler Martin
• Haering Andreas
• Schulze Selting Bruno
• Braun Erwin

Classifications

• B60C23/00363

  Details of sealings · CPC title

• B60C23/00345

  Details of the rotational joints · CPC title

• B60C23/00336 Primary

  on the axles · CPC title