SMD Harmonic Gearbox What is harmonic Gearbox? Harmonic gearbox is also known as Strain Wave gearbox is a mechanical gearing system that uses flexible spline with external teeth which is made by rotating elliptical plug to engage with the internal gear teeth of an outer spline. The Harmonic Gearbox was first invented by Harmonic Drive, Germany and they have manufactured first series under these type. Strain Wave Gearing is mainly used in Robotics and Aerospace.
Harmonic Gearbox Mechanism? Harmonic gearbox consist of mainly 3 parts i.e. Wave Generator, Flex Spline, Circular Spline. A Circular Spline has teeth on its inside. The flex spline and wave generator are placed inside the circular spline, meshing the teeth of the flex spline and the circular spline.As the Wave generator plug rotates the flex spline which are connected with circular spline slowly changes their position. For a strain wave gearing mechanism, the gearing reduction ratio can be calculated from the number of teeth on each gear, in a similar manner to a cycloidal drive:
R=
flex spline teeth – circular spline teeth Flex spline teeth