Spline Gearbox Oil Feed Using Centrifugal Pressure

The patent inverts the traditional external oil supply approach by implementing an internal oil supply system where oil is delivered from the center of the splined shaft through radial channels to the splined connection surfaces. This inversion enables direct oil delivery to the lubrication points, eliminating the need for spray systems and reducing oil consumption while improving lubrication reliability.

The rotating splined shaft itself serves as the oil delivery mechanism. The rotation of the shaft generates centrifugal force that moves oil through the internal channels and delivers it to the splined connection surfaces. This self-service approach eliminates the need for external spray systems and reduces oil consumption while maintaining effective lubrication.

The system uses the rotational motion of the splined shaft itself to generate centrifugal force, which automatically builds oil pressure and delivers oil to the lubrication points. This self-service mechanism eliminates the need for external pumps or pressure control systems, optimizing lubrication efficiency across varying speeds without significantly increasing system complexity.

The oil pressure and flow rate are automatically adjusted based on the rotational speed of the shaft. As the shaft rotates faster, centrifugal force increases, building higher oil pressure and delivering more oil to the splined connections. This dynamic parameter change optimizes lubrication efficiency for varying operational speeds without requiring complex control systems.

The patent reverses the oil supply direction from external (radial outside) to internal (radial inside). Oil is supplied to the center of the rotating splined shaft and then delivered radially outward through internal channels to the splined connection surfaces. This inversion protects the oil supply from contamination and pressure interference, as the oil is delivered from a protected central location rather than being exposed to the external environment.

The internal channels within the splined shaft serve as intermediaries that transport oil from the protected central supply to the external splined connection surfaces. This intermediary pathway shields the oil from contamination and pressure differences in the external environment, ensuring reliable lubrication delivery.