US Patent 10023406 Cycloidal wheel drive

A wheel assembly and a bin sweep system. The system may include a sweep auger for moving granules, and a wheel assembly including a rim and a tire disposed on the rim, the rim defining an interior radially inward of an inner circumference of the rim, and a cycloidal drive disposed in the interior of the rim. The cycloidal drive may include an input shaft, a drive gear having first gearing features and being eccentrically mounted on the input shaft, a stationary drive plate, and second gearing features coupled to the rim, the first gearing features engaging the second gearing features to drive the rim and wheel at a reduced speed relative to the input shaft.