Research of Tension of Flexible Gear Wheel of Harmonic Drive

In many respects Harmonic drives running is limited by the fatigue durability of flexible gear wheel. As various pilot studies show, the fatigue crack arises in a gear wreath on a joint of a transitional surface with a surface of hollows. The increase in load ability of Harmonic drives demands creation of the specified calculation method of tension in a gear wreath and on its basis of development of recommendations for the choice of key parameters of transfer. Offered in references mathematical model considers spatial nature of deformation and interaction of transfer elements. Use of this model allows specifying influence of various Harmonic drive parameters on tension in flexible gear wheel and to obtaining tension distribution within width of a gear wreath. In the article the results of settlement researches of tension in a gear wreath of flexible gear wheel of Harmonic drive with the cam generator of waves and diameter of a flexible wheel is equal 160 mm are given. For reduction of tension in flexible gear wheel it is offered to do deepening in several tens of microns on an external surface of the flexible bearing. The influence of the hollow width, the form of a cam, the radius of the curvature of transitional curve length of the cover and other parameters on tension in flexible gear wheel has been considered for Harmonic drive with the flexible bearing. The dependences which were revealed expand knowledge of impact on tensions in flexible gear wheel of the Harmonic drive parameters.

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