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

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.

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 stator assembly such that the shaft can rotate relative to the stator assembly.