BICYCLE WITH CHAINLESS BILATERALLY MULTISHAFT DRIVE MECHANISM AND ROBUST REAR WHEEL SUPPORT MECHANISM

摘要

This patent discloses bilaterally mounted chainless multi-shaft multi-axis drive mechanism for bicycle which uses multiple crankshafts on the front part, each having different center of rotation, coupled with a crankshaft mounted on rear wheel. Drive mechanism consists of pair of drive assemblies wherein each drive assembly consists of a special type of planetary gearbox in which plurality of suitably modified planetary gears and a gear ring are arranged in such a way that gear ring can be rotated via pedal which in turn rotates planetary gears along its direction of rotation. Planetary gears are modified to function as crankshaft by journalling metal pegs on its base circle. Larger radius of the gear ring than planetary gears accounts for gear ratio. Drive mechanism doesn't come in contact with clothing of the rider. Seat stay tube is replaced by robust rear wheel support mechanism to facilitate better bicycle kinematics.