Abstract
Coupled planetary drives can be obtained through coupling and fixing the base elements of two or more planetary drive units. Since planetary drives with three base elements are fundamental construction units of the coupled planetary drives, we carried out a general analysis of them to determine the properties of the coupled systems. We determined the directions of power-flows in each field of the transmission ratio, the kinematical-, dynamical- and efficiency equations, as well as self-locking power-flows and fields. Based on the results of research of planetary (differential) drives with three base elements we accomplished the analysis of several types of coupled planetary systems, such as 1 d-o-f coupled planetary drives with a closed circle, 2 d-o-f coupled planetary drives having constant transmission ratio, 2 d-o-f self-regulating continuously variable coupled planetary drive and a novel type of 2 d-o-f planetary mixers.
