BEARING MECHANISM FOR SLIDING PLUG DOOR

The present invention provides a sliding plug door bearing mechanism, wherein, a bearing carriage, an upper connecting shaft, an upper hinge holder, and a door carrying frame are connected sequentially to form a turning pair I; the door carrying frame, a lower connecting shaft, a lower hinge holder, and the door leaf are connected sequentially to form a turning pair II; bearing rollers are connected to the bearing rail to form a prismatic pair I; a guiding slide is connected to a guiding wheel to form a prismatic pair II with a predefined trace; the bearing carriage translates along the bearing rail in X-axis direction, while the door carrying frame drives the door leaf to turn around the X-axis of bearing carriage; the door carrying frame turns around the X-axis of bearing carriage while it moves straightly along the bearing rail, so as to drive the door leaf to accomplish displacement in Y-axis direction along the trace of the guiding slide. The present invention has the following advantages: the bearing guide mechanism of the door leaf translates in X-axis direction and turns around in X-axis to accomplish displacement of door leaf in Y-axis direction. The bearing guide mechanism incorporates translation motion and turning motion, and therefore has compact structure, high reliability, reduced requirement for precisions of parts, good machinability, high performance, and low manufacturing cost.