Patent ID: 11913523
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A precessional gear transmission including a casing, a satellite wheel with two bevel gear crowns installed on an inclined portion of a crankshaft between two central bevel gear wheels, a first central bevel gear wheel being immovably fixed in the casing and a second central bevel gear wheel being mounted on a driven shaft, gearing engagement of teeth being performed by contacts with convex-concave geometry, wherein teeth flanks of the two central bevel gear wheels have variable continuously increasing curvature from a base to a tip of the teeth and teeth of the crowns of satellite wheel have a circular arc flank profile, determined according to the configuration of parameters θ, δ, β and Z, at the same time the teeth of the two central bevel gear wheels and the teeth of the crowns of satellite wheel are shortened in height, wherein the teeth of the central wheels and the crowns of satellite wheel engage in multipair contacts with convex-concave geometry with a small difference of the profile flanks curvature of the teeth, including with pressure angles of up to 15° between conjugated flanks, gearings having a correlation of numbers of teeth of mating wheels Z1=Z2−1, Z4=Z3−1 or Z1=Z2+1, Z4=Z3−1 or Z1=Z2−1, Z4=Z3+1 respectively, with an angle δ of a conical axoid 0°<δ≤30° or with δ=0°, and an angle β that encompasses a radius of curvature r of the teeth profile of the crowns of satellite wheel being within limits of 2°≤β≤7°, and a nutation angle θ between axes of the crankshaft and the central bevel gear wheels having limits 1.5°≤θ≤7°.