Dynamic sealing structure for heavy hinge and dynamic sealing ring thereof

The utility model relates to a dynamic sealing structure for a heavy hinge and a dynamic sealing ring of the dynamic sealing structure, which comprise a hinge body I and a hinge body II which are matched with each other, a hinge part I and a hinge part II respectively extend from the connected end parts of the hinge body I and the hinge body II, are arranged up and down and are provided with through shafts together to realize the rotation of the hinge; the through shaft is sequentially sleeved with a movable sealing ring and a gasket, a first sealing lip of the movable sealing ring is attachedto the outer side face of the through shaft, and a second sealing lip of the movable sealing ring is attached to the gasket; the gasket is downwards embedded into the hinge part II; an O-shaped ringis mounted in a gap between the gasket and the hinge part II; the movable sealing ring and the gasket are arranged in a matched mode, so that the hinged part of the hinge is prevented from being eroded by rainwater and dust, t