Analysis of Nonlinear Characteristics of Double-Crank Ring-Plate-TypedPin-Cycloid Gear Planetary Drive

摘要

Double-crank ring-plate-typed pin-cycloid gear planetary drive conquers shortcomings of atraditional pin-cycloid gear planetary drive,whose load-capacity is restricted by rotation-arm bearingdimension.The load-capacity of this kind of new drive is improved greatly and the efficiency ofwhole machine is 94%.In order to know dynamics reliability of this drive ,nonlinear characteristicsof double-crank ring-plate-typed pin-cycloid gear planetary drive are analyzed from two sides oftransmission error and dynamic meshing process in this paper.A sensitive analytic mathematicmodel of rod dimension error is set up by kinematics theory.Based on ring-plate-type cycloid drivedynamic meshing characteristics,a rigidity-flexibility combined model of pin-cycloid planetary driveis set up by ANSYS/LS-DYNA module.Meshing process between pin-cycloid gear is simulated byFEM.Instantaneous stress,distortion and dynamic meshing rigidity are computed.Analytical resultsshow that nonlinear meshing rigidity and transmission errors are two main dynamic exciters whichcause prototype to vibrate.So,rod dimension error should be reduced in order to increase meshingaccuracy,and meshing rigidity of new prototype should be increased in order to reduce vibration.Nonlinear characteristics of the drive can offer some theoretical bases for design of new prototype.