Ship propulsion device and ship having the same

摘要

Disclosed are a ship propulsion device and a ship having the same. According to one embodiment of the present invention, the ship propulsion device includes a rear propeller fixed on a drive shaft; a front propeller supported on a drive shaft of the front of the rear propeller to be rotated; and a reverse rotary device having a plurality of gears which are provided on a rear side of the ship, and transmits rotation of the drive shaft after reversing the rotation to the front propeller.

主权项

1. A ship propulsion device comprising:
a rear propeller fixed to a drive shaft; a front propeller rotatably supported by the drive shaft in front of the rear propeller; and a counter rotation unit installed to a stern part of a hull, the counter rotation unit including a plurality of gears configured to reverse rotation of the drive shaft and transmit reversed rotation to the front propeller, wherein the counter rotation unit includes a driving gear fixed to the drive shaft, a driven gear fixed to a hub of the front propeller, and one or more reverse gears configured to reverse rotation of the driving gear and transmit reversed rotation to the driven gear, and wherein the drive shaft includes a flange portion formed at an outer surface thereof for installation of the driving gear, the flange portion having a first stepped portion, a second stepped portion formed at the rear of the flange portion for installation of the front propeller the second stepped portion having a smaller outer diameter than that of the first stepped portion, and a tapered portion formed at the rear of the second stepped portion for installation of the rear propeller.