Design a Two-Harmonics Transmission Mechanism with Roller Chain

Abstract

The binary row short-pitch transmission based precision roller chain highlights its radial flexibility and circumferential rigidity, it constructs a new type of harmonic transmission unit by replacing the tradition flexible wheel. Driven by a generator of mechanical harmonic wave the rollers of the binary row roller chain mesh with the teeth contour of the two inner gears which realizes reduction in small teeth difference and zero-tooth-difference synchronous output. The rotation components distribute uniformly on a plane. In theory, it is capable to eliminate dynamic imbalance factors. This paper detailed the principle of the harmonic drive meshing and gave out the design approach to control parameters of trough in the roller chain. Through the prototype testing, it confirmed the feasibility of this transmission mode.