| 摘要 |
PROBLEM TO BE SOLVED: To provide a bicycle of straight drive type capable of obtaining more excellent drive efficiency and rotational efficiency. SOLUTION: Main shafts 1, 1' to be slidably connected to straight bearings 16, 16' fixed to a body part 18 are provided with wheels 2, 2' on a lower end part and pedals 3, 3' on an upper end part, free wheels 4, 5, 6 are fixed to the body part 18, and a chain 12 is connected for turning to a wheel 7, a free wheel 8, a wheel 11, and a free wheel 4 through the free wheels 4, 5, 6 and the wheels 2, 2' of the main shafts 1, 1' therebetween. The free wheel 5 is provided with a laminated free wheel 10 in which a free wheel 9 connected to an outer ring is connected to the free wheel 8 and its outer ring, and a drive axle 20 of a rear wheel is driven by directly connection by a chain 13 and connection to the rear wheel 17. |
