| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate turning operation of a case; and to prevent the turning operation of the case from affecting the rotation of a propeller. <P>SOLUTION: In a turning type propeller device 1, the power of a propeller driving source 2 is transmitted to the propeller 11, and the direction of the propeller is turnable. The turning type propeller device includes a propeller shaft 10 with the propeller fixedly attached to one end thereof, and a driven gear 12 fixedly attached to the other end thereof; and a drive transmission shaft 20 for transmitting the power from the propeller driving source to the propeller shaft. The drive transmission shaft is composed of a contra-rotating shaft which includes a hollow outer shaft 30 having at one end thereof an outer shaft end driving gear 31 engaged with the driven gear; and an inner shaft 40 formed to extend through the inside of the outer shaft, and having at one end thereof an inner shaft end driving gear 41 engaged with the driven gear. The outer shaft end driving gear and the inner shaft end driving gear are respectively engaged with the driven gear. <P>COPYRIGHT: (C)2011,JPO&INPIT |
