Detachable roller pin for engine

The utility model discloses a detachable roller pin for an engine. The roller bearing comprises a retaining frame, a roller pin, a reinforcing cavity, a compression spring and a rectangular oil conveying cavity, a roller pin is arranged in the center of the interior of the retaining frame; four groups of reinforcing cavities are formed in the outer side wall of the roller pin; an included angle between every two adjacent reinforcing cavities is 90 degrees; support sections are arranged at the bottom end of the interior of the reinforcing cavity at equal intervals; a wear-resistant reinforcingsheet is arranged in the reinforcing cavity on one side of the support joint; clamping cavities are formed in the inner walls of the retaining frames on the two sides of the roller pins, anti-disengaging arc-shaped pieces are fixed to the two ends of the inner side walls of the clamping cavities, pressing springs are arranged on the inner side walls of the clamping cavities on one sides of the anti-disengaging arc-shaped