Abstract
The research object is a harmonic drive with a cam wave generator. Harmonic drive operation is limited by flexible gear (FG) fatigue resistance, flexible bearing (FB) durability and teeth sides wear resistance. The article describes a refined method for determining flexible bearing durability, taking into account the spatial nature of elastic interaction between a rigid gear, a flexible gear and a flexible bearing. According to the suggested method, the impact of the maximum flexible gear deformation and length on the durability of a flexible bearing of a cup-type harmonic drive with a flexible gear has been studied. The dependences of the life of the flexible bearing on the length of the flexible wheel and the maximum deformation of the flexible wheel at the nominal torque and various forms of its deformation are obtained. It is shown that small values of the flexible wheel length can significantly reduce the service life of the flexible bearing. The obtained dependencies expand the knowledge about the impact of various factors on the durability of flexible bearings of harmonic drives.
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