Abstract
China Bearing Reducer (CBR) is a one stage new type cycloid drive reducer which has large transmission ratio, high payload, high torsional stiffness, high tilting stiffness, compact size. In this paper, the cycloid gear with tooth modification of CBR reducer was investigated to analyse the contact force and stress. Firstly, the mechanical design of CBR reducer was introduced. Then, the profile equation of cycloid gear was derived by inverted gear train method. And the modified profile equation was derived by adding a small increment into the profile equation. Secondly, the dynamic model was built by multi-dynamics theory. Thirdly, the number of simultaneous contact teeth, contact force, stress with respect to modification value were investigated by dynamics software. The results show that the larger is the clearance between the cycloid teeth and pin, the larger are the contact force and stress.
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