Open AccessThe Design and Test of Elliptical-Circular Bicycle Sprockets
Author(s) -
Ardi Lesmawanto,
ShinnLiang Chang,
S L Ho BSc PhD Miee Mhkie CEng,
Shin-Hao He
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/644/1/012005
Subject(s) - sprocket , torque , crank , circular motion , engineering , physics , mechanical engineering , cylinder , thermodynamics
Most people have different strength and frequency of the movements between the left and the right body side. In riding a bicycle with circular sprocket, the torques produced by the right leg and the left leg are generally different. Usually, the dominant leg exerts larger force than the non-dominant leg. Based on these conditions, in this paper, the application of elliptical-circular bicycle sprockets with the right size and position on the leg can provide more advantages compared to the ordinary circular sprocket in cycling. The crank torque comparisons reveal that the application of the elliptical-circular sprocket can reduce the torque produced by the right leg, and increase the torque produced by the left leg. This proves that the elliptical-circular sprocket is useful for balancing the force produced between the left leg and the right leg. Then, from the leg joint comparisons, the elliptical-circular sprocket can reduce the torque in the hips, knees, and the ankles. This means that the use of elliptical-circular sprocket can reduce the legs fatigue in riding a bicycle.