| 摘要 |
PROBLEM TO BE SOLVED: To provide a propeller blade fixing mechanism which can fix blades stably to a propeller boss after insertion of stems of the blades into spiral blade insertion grooves formed in the surface of the propeller boss in the axial direction.SOLUTION: A propeller blade fixing mechanism 5 for a propeller integrates propeller blades by inserting stems of blades 20 into a plurality of blade insertion grooves 11 formed around a boss 10 and fixing them. The boss 10 has, in the axial direction, spiral blade insertion grooves 11 with a specified depth from the boss front surface side, and the blades 20 have a spiral stem 21 having a cross sectional shape which is inserted into the blade insertion groove 11 and engaged with the spiral blade insertion groove 11. Between the blade insertion groove 11 of the boss 10 and the spiral stem 21 of the blade 20, there is provided a bolt member 30 for pressing the spiral stem 21 inserted into the blade insertion groove 11 from the center of the boss outwardly in the radial direction, to press the spiral stem 21 into the blade insertion groove 11. |
