Abstract
As a new type of gear transmission, nutation gear drive is extensively applied in aviation, ship, medical equipment and other fields. In this paper, a two-stage nutation drive mechanism of double circular arc (DCA) bevel gears is presented and its dynamic characteristics are studied. First, according to the principle of meshing transmission, a mathematical model of dynamic transmission error (DTE) based on assembly errors is established. Through the analysis of dynamic transmission characteristics, the DTE curves with assembly errors and varying load are obtained, and the simulation results are analyzed reasonably by using RMS evaluating indicator. Finally, through the test verification under different loads, it is concluded that in a reasonable loading range, the decrease of load will reduce the fluctuation range of transmission error. The reduction of transmission error fluctuation indicates that the nutation drive of DCA spiral bevel gears is more stable and the noise is reduced under low load conditions. The study of the dynamic characteristics will provide theoretical basis and practical reference for the design of DCA spiral bevel gears.
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