PROPELLER SHAFT STRUCTURE

PURPOSE:To prevent water from intruding at a joined part by forming a shaft end part in such a way as the joined part can be covered up for its sealing in the case of fitting an axially knurled joined part of a yoke into the end of an aluminum hollow shaft. CONSTITUTION:The joined. part 3 of a yoke 2 is fitted into the end part 1a of a hollow shaft 1, and pressedly fitted up to an oblique swelled part 6 in which the end part 1a has bulged out of a end part 5a on the side of the joint part 4 of a knurled part 5. The hollow shaft 1 on the knurled part 5 is knurled for calking. Thus the irregular acute angled shape of the knurled part 5 is crushed into a round shape at the top of its protruding part by the inside of the hollow shaft 1 to tightly join the yoke 2 and the hollow shaft 1, and the end part 5a is press-fittedly sealed through the swelled part 6 to prevent the intrusion of water.