High-efficiency driving mechanism of bicycle

Abstract

The invention discloses a high-efficiency driving mechanism of a bicycle. The high-efficiency driving mechanism comprises a left belt, a right belt and a middle belt, wherein the middle belt is connected between a middle upper reversing wheel and a middle lower reversing wheel; the left belt is connected between left upper and lower reversing wheels and a left belt pulley; the right belt is connected between right upper and lower reversing wheels and a right belt pulley; the upper end of a left pedal is simultaneously connected to the left belt and the middle belt; the upper end of a right pedal is simultaneously connected with the right belt and the middle belt; the left belt pulley and the right belt pulley are movably sleeved on a rear wheel shaft; outer side faces of the left belt pulley and the right belt pulley are provided with a left driving chain disc and a right driving chain disc respectively; a left driven chain disc and a right driven chain disc are movably sleeved on a chain wheel shaft; a front left pawl is arranged on the left driven chain disc and is matched with a front left ratchet which is fixedly sleeved on the chain wheel shaft; the right driven chain disc is provided with a front right pawl which is matched with a front right ratchet which is fixedly sleeved on the chain wheel shaft; and the front left ratchet and the front right ratchet are in bilateral symmetry. Since the left pedal and the right pedal only do rectilinear motion, pedal force can act on a part of maximum moment all the time to obtain maximum torque output.

Description

technical field [0001] The present invention relates to mechanical drive mechanisms, especially bicycle drive mechanisms. Background technique [0002] The drive mechanism of existing bicycle comprises pedal, drive sprocket, chain and flywheel etc., and flywheel is fixed on the axle of rear wheel, and drive sprocket is contained on the sprocket axle (bicycle central axis), and chain is wound around drive sprocket and flywheel. In between, the pedaling force of the foot is transmitted to the rear wheel by the pedal (equivalent to the crank), the driving sprocket, the chain, the flywheel and other components, thereby driving the bicycle to move forward. [0003] Since the driver and passenger sit on the seat cushion and step on the pedals, and the pedals make a circular motion, the direction of the pedaling force of the feet cannot be guaranteed to be always perpendicular to the moment arm. At the same height position and the pedal force is vertically downward (assuming the b...

AI Technical Summary

Problems solved by technology

In addition, since the pedals do circular motion, the range of motion of the feet is limited when riding a bicycle. The circular motion radius of the pedals should not be too large. This is one of the reasons why the speed of ordinary non-variable bicycles is not high.

Images