| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a comfortable running feeling to a driver through aural by generating the sound that synchronizes with the rotating speed of an electric motor by a simple structure in the motorcycle. <P>SOLUTION: The motorcycle 1 includes: the electric motor 4 that rotates and drives a rear wheel 90; a housing 20 that accommodates the electric motor 4; a fan 44 that synchronizes with a rotary shaft 42 of the electric motor 4 flows the air in the housing 20 and aircools the electric motor 4, and makes the air after aircooled flow out from the housing 20; and a passage sound generation means 3 that is installed at the air flow insertion side of the housing 20 and generates the passage sound of the air as an intermittent sound synchronizing with the rotation of the rotary shaft 42. The passage sound generation means 3 includes: a rotary plate 30 which is connected with the rotary shaft 42 and in which a first through-hole 32 that the air that enters by the fan 44 passes is formed; and a fixed plate 31 which opposes to the rotary plate 30 and in which the second through-hole 33 is formed, and the area in which the first through-hole 32 and the second through-hole 33 overlaps is changed by the rotation of the rotary plate 30. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
