POWER TRANSMISSIONG APPARATUS FOR BICYCLE HAVING ONE BODY TYPE HUB

摘要

PURPOSE: A power transmission device for a bicycle with an integrated hub is provided to transmit the power applied to the pedals to the rear wheel of a bicycle through gears without a chain. CONSTITUTION: A power transmission device for a bicycle comprises a pair of pedals(12), a pair of pedal gears(20), a pair of hub gears(30), a pair of idle gears(40), and an integrated hub. The pedals are respectively attached to the left and right sides of a rear wheel. The pedal gears are respectively connected to the pedals. The hub gears are installed in the central axle of the rear wheel. The idle gears are installed between the pedal gears and the hub gears to make the pedal gears and the hub gears rotate in the same direction. The hub gears are connected to both sides of the integrated hub and rotate at the same rpm.