| 摘要 |
PURPOSE: A three-wheeled bicycle is provided to increase rotation speed twice using the gear ratio of a front bevel gear part and a rear bevel gear part so that the bicycle can easily run on a hill. CONSTITUTION: A three-wheeled bicycle(100) comprises a front bevel gear part(130), a power transmission shaft(140), and a rear bevel gear part(150). The front bevel gear part comprises a front driving bevel gear(132) and a front driven bevel gear(134). The front driving bevel gear is rotated by the rotation of a crank(112) with pedals(110). The front driven bevel gear is coupled to the front driving bevel gear. The front end of the power transmission shaft is rotationally connected to the rear side of the front driven bevel gear; is longitudinally extended; and is rotationally connected to a frame(142) by a bearing(144). The rear bevel gear part comprises a rear driving bevel gear(152) and a rear driven bevel gear(154). |
