Oil seal for automatic gear

摘要

The gear has a cylindrical component (62,63) with an inner oil chamber (25). The cylindrical component rotates in reaction to an external force over a predetermined angle range. An oil aperture (73) is formed in the cylindrical component to produce a fluid connection with the oil chamber. A cavity in the cylindrical component surrounds the aperture. A cylindrical sealing component (77) is pressed against the cylindrical component, so that one end of the sealing component is pressed in the cavity and forms an oiltight structure with the cylindrical component. An oil feedback device (88) feeds oil via an oil channel (72) connected with the sealing component and the oil aperture to the oil chamber (25). The sealing component has an outer peripheral surface and a device for pressing this surface against an inner peripheral surface of the cavity as a reaction to oil pressure in the sealing component (77).