| 摘要 |
PURPOSE:To increase the driving propulsion force by using a small front gear fixing an interlocking shaft, small rear gear fixing the interlocking shaft, and a connecting rod, as driving mechanism, in substitution for a chain. CONSTITUTION:A small front gear shaft 7 is installed behind a large gear A, and a small front gear B having the number 18T-17T of gears for the number 36T-34T of gears of the gear A is installed in turnable manner on the small front gear shaft 7. A short interlocking shaft E is fixed on the gear B. A small rear gear C having the number 18T of the gears is installed in free rolling on a small rear gear shaft 8 installed in the aslantly front upper part of a flywheel G. A short interlocking shaft F is fixed also on the gear C. The interlocking shafts E and F are connected through a connecting rod D. The strong driving force generating division in the revolution process of pedals (2) and 4 is the part within a fan shape spreading in about 90 deg. vertically, around the case where cranks (1) and 3 are at the front horizontal positions. As for the stepping-down force concentrated on a pedal shaft 5 at this time, the interlocking shaft E pushes out the rod D by the strong force in three times of 2.4, i.e., 7.2 through the gear B which is boosted in 2.4 times of the gear A. |
