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Abstract

The refinement of such harmonic drives according to German Patent 1 98 33 290 C1=European Patent Application 0 974 773 A concerns damping of the noise generation as a consequence of the revolving displacement of discrete tappets (instead of the rotating deformation of the closed hub of a spoked wheel) on the non-round wave generator. Since the feet of the individual--not guided in a cage, but rather connected to one another by a flexible ring band--tappets are no longer solid, but rather split, they are to be able to elastically bend so they may press continuously against the drive core of the wave generator. The peripheral connection of the neighboring tappets via the ring band, which is thin in comparison to their diameters, is to be laid out in such a way that a spring effect is achieved, using which the tappet--even in the course of instantaneous reduction in diameter as the drive core, which is oval in cross-section, rotates out of the angular region of its greatest diameter--is always kept radially pressing snugly against the non-round wave generator in order to, in this way, suppress a noise-generating radial rebound from a displacement position which is still radially lifted.

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First Claim