Hub type moving guide device of greenhouse covering collecting and releasing machine

A hub type movable guide device of a greenhouse covering collecting and releasing machine comprises a bearing body which comprises a movable outer ring, a static inner ring and a set of rolling bodies, and is characterized by further comprising a movable outer ring cavity sealing cover, a static inner ring fixing shaft and a rolling body lubricating oil supply mechanism, the bottom of the movable outer ring is sealed, and a movable outer ring cavity is formed in the center of one side of the movable outer ring; the peripheral edge part of the movable outer ring cavity sealing cover is in sealing fit with the upward side of the movable outer ring, the upward side is provided with a concave cavity, and the central position is provided with a static inner ring matching hole; the lower end of the static inner ring fixing shaft extends into a static inner ring central hole of the static inner ring, and the upper end of the static inner ring fixing shaft extends upwards in the direction deviating from the upper sur