| 摘要 |
PURPOSE:To enable usage in a small vessel, by coupling a stern shaft having a motor case and a propeller shaft bendably then penetrating a variable node shaft bendably through a hollow hole to provide a variable pitch propeller through a differential machine. CONSTITUTION:A stern shaft 4 coupled to an output shaft 2 has a motor case 6 then coupled to a propeller shaft 9 through an universal joint 8, and propeller vane 19 is provided rotatably to a propeller boss 11 at the end. While a motor 23 associated with a speed reduction gear 22 is fixed to the case 6, then its variable node shaft 20 is penetrated bendably through the hollow sections 5, 5' in the stern shaft 4 and the propeller shaft and coupled to a differential machine 18 comprised of bevel gears 12-17 in the propeller boss section 11 to make the propeller pitch variable through the rotation of the motor 23. When anchoring at the shallow place, the propeller 40 is salvaged by a salvaging rod 42 and protected. Consequently a variable pitch propeller can be used even in a small fishing vessel. |
