Long-inner-ring radial spherical plain bearing

The utility model relates to a sealed joint bearing, in particular to a radial joint bearing with a long inner ring, which comprises an outer ring, an inner ring and a sealing ring arranged between the outer ring and the inner ring. An outer spherical surface is arranged in the middle of the outer diameter of the inner ring, and a matched inner spherical surface is arranged at the position, corresponding to the outer spherical surface, of the inner diameter of the outer ring. Corner type contact surfaces are symmetrically arranged on the inner diameters close to the two end surfaces of the outer ring respectively; inner grooves are symmetrically formed in the two sides of the outer spherical surface of the outer diameter of the inner ring, and stop shoulders are formed between the side walls of the sides, close to the end face of the inner ring, of the inner grooves and the end face of the inner ring; one end of the sealing ring abuts against the corner type contact faces at the two ends of the outer ring, an