Motor shaft adapter

An apparatus, comprising:

• a cylindrical shaft sleeve comprising a tubular body defined between an inner cylindrical surface and an outer cylindrical surface;
• a first key slot aperture defined by opposing body end-walls of the tubular body and through the inner cylindrical surface and the outer cylindrical surface;
• a shaft key comprising outer sidewalls, wherein the outer sidewalls comprise a pair of opposing outer sleeve aperture sidewall portions that are located a sleeve aperture width apart that is selected to enable the shaft key outer sleeve aperture sidewall portions to fit within the first key slot aperture and to thereby engage the opposing body end-walls of the first key slot aperture;
• and
• the shaft key outer sidewalls further comprising a base pair of opposing key seat engagement portions that are located a key seat width apart that is selected to enable the base pair of opposing key seat engagement portions to fit within opposing sidewalls of a key seat aperture that is defined within a workpiece motor shaft located within the cylindrical shaft sleeve tubular body and to thereby engage the opposing sidewalls of the workpiece shaft key seat aperture;
• wherein the sleeve inner cylindrical surface defines a central cylindrical aperture on an inner surface radius from a central cylindrical axis of the sleeve that is selected to correspond to a radius of an outer cylindrical surface of the workpiece motor shaft so that the sleeve inner cylindrical surface fits over and engages the cylindrical outer surface of the workpiece motor shaft;
• wherein the sleeve outer cylindrical surface is defined on an outer surface radius from the central cylindrical axis of the sleeve that is larger than the inner surface radius and is selected to align the sleeve outer cylindrical surface to correspond to a radius of an inner cylindrical surface of a rotating machine element of a workpiece gearhead, so that the sleeve outer cylindrical surface fits within and engages the inner cylindrical surface of the rotating machine element and
• wherein, in response to rotation of the workpiece motor shaft by a workpiece motor with an input rotation speed and an input torque, engagement of the workpiece shaft key seat aperture opposing sidewalls with the shaft key base pair of outer sidewall opposing key seat engagement portions, engagement of the shaft key outer sleeve aperture sidewall portions with the opposing body end-walls of the first key slot aperture, and engagement of the sleeve outer cylindrical surface with the inner cylindrical surface of the rotating machine element cause the sleeve and shaft key to drive the workpiece rotating machine element of the workpiece gearhead into an output rotation having an output rotation speed and an output torque.