Precessional gear transmission: SUA Patent US 11913523 B2 of Feb. 27, 2024

Abstract

Goal: Increasing the convex-concave contact load bearing capacity by identifying the conjugated profiles with the small difference in the curvature radius. Solution: The teeth gearing is performed in contacts with convex-concave geometry, wherein the central bevel wheels are made with curvilinear flank profiles with variable curvature with one tooth less than the satellite wheel gear rings made with circular arc flank profiles, the teeth flanks mate with frontal overlap within the ef limits 1.5≤ ≤4.0 simultaneously engaged pairs of teeth, ef at the same time the gearwheels are made with the conical axoid angle within the limits with the 0°≤d≤30° angle between the axes of the crank and the central bevel wheels within the limits 1.5°≤ ≤7°, and the q circular arc radius of the flank profile of the Z-toothed satellite wheel gear rings is within the limits (1.0-1.57) D/Z [mm], which generally provides a reduction of the difference in the curvatures of the flank profiles in the section with diameter D of up to (0.02-1.5) D/Z [mm] and a decrease in the pressure angle between the flanks of a up to 15°, as well as a decrease in the relative sliding velocity between the mating flanks.