Torque Transmission Device Fluid Passage Design

The patent positions the fluid inlet holes on the flat face of the rotor support at locations that are predetermined to be free of burrs. By selecting the drilling location in advance on a smooth surface rather than in grooves where burrs form, the design prevents contamination before it can occur.

The patent converts the potentially harmful groove surfaces that generate burrs into beneficial flat surfaces that are burr-free. By relocating the hole drilling from groove surfaces to flat faces, the design transforms a harmful manufacturing characteristic into a beneficial one for fluid passage creation.

The flat face of the rotor support serves multiple functions: it provides a mounting surface for the rotor, a drilling surface for fluid inlet holes, and an alignment reference for the splined connection. This multi-functionality eliminates the need for separate keying mechanisms while maintaining precision.

The splined connection between the rotor support and main hub automatically provides alignment and positioning for the fluid passages. The geometry of the splines themselves serves the alignment function, making the system self-aligning without additional keying components.

The patent separates the mechanical connection function (provided by the splined hub) from the fluid passage creation function (holes in the rotor support flat face). By segmenting these functions to different locations and surfaces, the robust mechanical link can exist without compromising the burr-free drilling of fluid passages.

The flat face of the rotor support acts as an intermediary surface between the splined mechanical connection and the fluid passages. It provides a stable, burr-free drilling surface that is distinct from the grooved surfaces where burrs would form, while still being part of the robust mechanical assembly.