Method for designing spacer bush of rod end spherical hinge

The invention relates to the field of damping of elastic rubber parts, and particularly relates to a method for designing a spacer bush of a rod end spherical hinge. The rod end spherical hinge comprises an outer sleeve, a mandrel and a rubber layer, the spacer bush is arranged in the rubber layer, the spacer bush is provided with a spacer bush upper side surface, a spacer bush lower side surface and a spacer bush end surface, one end of the spacer bush end surface is connected with the spacer bush upper side surface, the other end, opposite to the upper side surface of the spacer bush, of the spacer bush end surface is connected with the spacer bush lower side surface, a tip B1 is formed between the spacer bush end surface and the spacer bush upper side surface, the tip B1 between the spacer bush upper side surface and the spacer bush end surface is in point contact with a mold, the spacer bush is axially located in the vulcanization process by adopting point contact between the tip B1 and the mold, and the