| 摘要 |
PURPOSE:To perform pitch adjustment for a propeller blade so smoothly, by constituting a cam driven body of a base end part of the propeller blade being guided as engaged with the guide groove installed in a hull bossing part, with two rollers to be pivotally attached to a fulcrum shaft. CONSTITUTION:Plural propeller blades 11 are rotatably supported on the circumference of a propeller boss 13. At this time, the projecting shaft 14 formed in a rotary block 12 of a base end part of each propeller blade 11 is supported by a hole part of the propeller boss 13, and each of these blades 11 rotates centering on this shaft 14, thus the pitch is adjusted. And, an annular guide groove 16 is formed on the circumference of a rear end part of a stern bossing 17a, and the cam driven body 15 formed in the rotary block 12 is engaged with this guide groove 16. This cam driven body consists of two rollers 15b and 15c pivotally attached to a forked shaft part 15a and another forked shaft part 15a, while these rollers 15b and 15c are guided into a side wall where the guide groove 16 is opposed. Therefore, rotation of these propeller blades 11 becomes smoothed enough.
|
