Flexible Shaft Drive Connection for Rotary Knife Alignment

The patent replaces the symmetric square fitting connection with an asymmetric tapered connection. The drive transmitting shaft has a tapered central projection that fits into a tapered central opening in the drive motor coupling. This asymmetric tapered geometry provides self-aligning properties and prevents the alignment issues experienced with square fittings, while still maintaining structural simplicity.

The patent changes the geometric parameters of the connection interface from a square cross-section to a tapered conical shape. This parameter change transforms the connection from a rigid, non-self-aligning joint to one that naturally guides proper alignment through its tapered geometry, eliminating the need for complex alignment procedures while improving connection precision.

The patent removes the slip ring component entirely from the motor end coupling. Instead of allowing relative rotation through a complex slip ring mechanism, the design accepts that the motor and drive transmitting shaft are rigidly connected once coupled. This extraction of the unnecessary component simplifies the overall structure while maintaining the required functionality.

Rather than designing a complex mechanism to allow relative rotation (slip ring), the patent inverts the approach by designing a rigid connection that prevents relative rotation. The tapered connection geometry itself provides the necessary alignment and connection stability without requiring additional rotational accommodation mechanisms.