Projection-Locked Torque Coupling for Low-Drag Planetary Gears

The invention divides the continuous axial contact surface into discrete point contacts through the projection-gap structure. The ring gear carrier has radially projecting elements that engage into axially spaced gaps in the ring gear, creating segmented contact points rather than continuous annular contact. This segmentation allows oil to drain through the gaps while maintaining adequate axial securing through the distributed projection contacts.

The invention transitions from axial securing through continuous annular contact to axial securing through radially projecting elements that engage into axially spaced gaps. This dimensional change allows the ring gear carrier to be axially secured at discrete points while reducing the overall radial height, as the securing function is achieved in the radial direction through projection engagement rather than through extended axial contact.

The invention applies different functional qualities to different parts of the projection structure. The projections have axial sections that provide torque transmission through engagement into gaps, while also having radially extending portions that provide axial positioning. This local differentiation allows torque transmission and axial spacing functions to be integrated in the same structural element, achieving effective torque transmission without excessive axial spacing requirements.