Gear drive, especially planetary gear drive, with pressure equalization

Abstract

Gear drive (1), for example, a planetary gear drive, having a housing (2) and at least one shaft (4), for example, an output shaft leading through the housing wall (3) toward the outside. For equalization of pressure, a pressure-equalization chamber (5) is positioned in the interior of the shaft (4) and/or a drive part (6) associated therewith and is connected, on the one hand, with the interior of gear drive (1) and, on the other hand, with the external atmosphere, for example, via a borehole (11) running through shaft (4) so that the shaft (4), which has to pass through the housing (2) of the gear drive (1), is employed in equalization of pressure. Located in the pressure-equalization chamber (5) is a membrane (7) that is deformable via pressure differentials. The membrane separates and seals the external atmosphere and the interior of the gear drive from each other.

Dependencies are inferred from the claim text.