Methods and apparatus for minimizing backlash in a planetary...

F - Mech Eng,Light,Heat,Weapons – 16 – H

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F16H 1/28 (2006.01) B64C 13/28 (2006.01)

Patent

CA 2562894

A planetary gear system (10) includes a planetary gear assembly (14) having a first planetary gear (28), a second planetary gear (32) rotatable relative to the first planetary gear, and a torquing mechanism (16). The torquing mechanism generates a torsional spring force of the planetary gear assembly to cause the first planetary gear to rotate along a first direction and the second planetary gear to rotate along a second direction, opposite to the first direction. As a result, the teeth of the first planetary gear contact teeth of a corresponding first stationary ring gear (18-1) and the teeth of the second planetary gear contact teeth of a corresponding second stationary ring gear (18-2) . The torquing mechanism, along with the configuration of the planetary gear assembly, minimizes or eliminates the presence of gaps between the contacting teeth of the planetary assembly and the stationary gear rings (18) and minimizes backlash within the planetary gear system.

La présente invention concerne un système à engrenages planétaires comprenant un ensemble d'engrenages planétaires qui présente un premier engrenage planétaire, un second engrenage planétaire pouvant tourner par rapport au premier engrenage planétaire, ainsi qu'un mécanisme de serrage. Le mécanisme de serrage génère une force de ressort de torsion de l'ensemble d'engrenages planétaires, afin d'induire la rotation du premier engrenage planétaire dans un premier sens et la rotation du second engrenage planétaire dans un second sens, opposé au premier sens. Il en résulte que les dents du premier engrenage planétaire viennent en contact avec les dents d'une première couronne fixe correspondante et les dents du second engrenage planétaire viennent en contact avec les dents d'une seconde couronne fixe correspondante. Le mécanisme de serrage, avec la configuration de l'ensemble d'engrenages planétaires, permet de minimiser ou de supprimer la présence d'espaces entre les dents en contact de l'ensemble planétaire et les couronnes fixes et de minimiser le jeu entre dents dans le système à engrenages planétaires.

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