Universal joint pin assembly for reducing stress concentration of universal joint

The utility model relates to a universal joint pin assembly for reducing stress concentration of a universal joint, which belongs to the technical field of universal joints and comprises a universal joint pin, a shaft sleeve movably nested with the universal joint pin in a sealing manner is arranged on the universal joint pin, a plurality of roller pins are arranged between the shaft sleeve and the universal joint pin, a dustproof cover is arranged between the opening of the shaft sleeve and the universal joint pin, and an oil seal is arranged between the dustproof cover. And a compression spring washer is arranged between the oil seal and the roller pin. The shaft sleeve comprises a shaft sleeve raceway, the shaft sleeve raceway is provided with a shaft sleeve middle micro-arc-shaped groove which is integrally concave with the shaft sleeve raceway, and a shaft sleeve near-root micro-arc-shaped groove which is integrally concave with the shaft sleeve raceway is arranged between the shaft sleeve middle micro-a