| CPC F16H 1/2827 (2013.01) [F16H 1/46 (2013.01); B60G 2204/4191 (2013.01); F16H 1/006 (2013.01); F16H 1/2836 (2013.01); F16H 1/36 (2013.01); F16H 2057/02043 (2013.01)] | 11 Claims | 

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               1. A universal driving device comprising: 
            a ring gear; 
                a sun gear having a sun gear axis is moveable relative to a ring gear axis of the ring gear; 
                a gear train comprising a series of gears configured to connect the sun gear and the ring gear; 
                a plurality of link mechanisms configured to accommodate a change in an inter-axis distance between the sun gear and the ring gear, and rotatably connected with respect to each other to continuously maintain a power transmission state between the sun gear and the ring gear, thereby supporting rotation shafts of gears constituting the gear train; 
                a carrier configured to support a rotation shaft of a final gear engaged with the ring gear, among the gears constituting the gear train; 
                a sun gear bearing positioned between the rotation shaft of the sun gear and each of the plurality of link mechanisms; and 
                a sleeve positioned between the sun gear bearing and each of the plurality of link mechanisms. 
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