Intermediate shaft for ship transmission system

The utility model relates to the technical field of intermediate shafts, in particular to an intermediate shaft for a ship transmission system, which comprises an intermediate shaft body, a positioning ring is protruded outwards from the middle of the intermediate shaft body, a support ring is sleeved outside the positioning ring, and at least three roller seats are uniformly distributed on the inner ring wall of the support ring along the circumference of the support ring. A roller is rotationally arranged on each roller seat; according to the utility model, the adjustable roller is arrangedoutside the intermediate shaft body; the rotating stability of the intermediate shaft is improved; radial run-out of the intermediate shaft is effectively prevented; the service lives of the gear boxand the bearing on the propeller shaft are prolonged; and after the roller wheel is abraded, the roller wheel seat can be pressed by rotating the adjusting rod, so that the roller wheel seat and the roller wheel on the roller