Design and Fabrication of Chainless Bicycle

Abstract: Today's life we meet number of difficulties in transportation. There are number of drives to transmit the power. We have concentrated on bicycle where the efforts while peddling is not efficiently turned to work. In bicycle chain drive is used. Due to the chain drive there is loss of power in transmission. So our idea is to replace chain drive by kinematic links for higher transmission. This project is developed for the users to rotate the back wheel of a bicycle using kinematic links. Power transmission through chain drive is the oldest and widest used method in case of bicycle. In this paper we implemented the chain less transmission to the bicycle to overcome the various disadvantages of chain drive. Recently, due to advancements in kinematic link technology, a small number of modern link-driven bicycles have been introduced. Usually in bicycle, chain and sprocket method is used to drive the back wheel. The link drive only needs in small amount of lubrication using a grease to keep the links running quiet and smooth. A link drive bicycle is a bicycle that uses a link drive instead of a chain which contain four set of link at both the ends to make a new kind of transmission system for bicycle for getting high reliability system, and more safe system. Link-driven bicycle have used four bar mechanism where a conventional bicycle connected in one end pedal link and another connected in wheel. This pedal link actuate to drive a wheel. The use pedals to be actuate in 45 degrees wheels can rotating at 180 degrees. According to the direction of motion of pedal, the wheel will be moved forward. This avoids the usage of chain and sprocket method. This “chinless” drive system provides smooth quite and efficient transfer of energy from the pedals to the rear wheel. It is attractive in look compare with chain driven bicycle. Keywords: Chainless bicycle, four bar mechanism, kinematic link technology.

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Dynamic Analysis of Silent Chain Drive System for Hybrid Car

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.694-697.84 ◽

2013 ◽

Vol 694-697 ◽

pp. 84-89 ◽

Cited By ~ 4

Author(s):

Zeng Ming Feng ◽

Jun Long Li ◽

Guang Wu Liu

Keyword(s):

Power Transmission ◽

Impact Load ◽

Transmission Error ◽

Drive System ◽

Chain Drive ◽

Chain System ◽

Hybrid Car ◽

Allowable Range ◽

Multi Body ◽

Body Dynamic

Based on study of the power transmission system theory for hybrid car, a silent chain drive system which is used to transmit power between motor and gear box was designed. Using multi-body dynamic software RecurDyn, the dynamic behavior of the silent chain system was simulated, the chain tension, meshing impact load and instantaneous transmission ratio of the drive system under different velocity was analyzed. The results show that, at the whole speed range, the chain tension is always less than the chain rotation fatigue strength (including a safety factor of 1.3 times), its able to meet the working requirements, the instantaneous impact load when link plate meshing into sprocket relate to chain tension and sprocket rotation speed, the transmission error of silent chain system is within the allowable range and can meet the transmission requirement.

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The Design of Variable-Ratio Chain Drives for Bicycles and Ergometers—Application to a Maximum Power Bicycle Drive

Journal of Mechanical Design ◽

10.1115/1.3254810 ◽

1980 ◽

Vol 102 (4) ◽

pp. 711-717 ◽

Cited By ~ 8

Author(s):

N. R. Miller ◽

D. Ross

Keyword(s):

Angular Velocity ◽

Rear Wheel ◽

Constant Angular Velocity ◽

Drive Train ◽

Chain Drive ◽

Percent Increase ◽

Power Comparisons ◽

Synthesis Procedure ◽

A Chain ◽

Chain Drives

This paper describes a technique for generating a chain drive capable of allowing a desired varying angular velocity function on the driving shaft while maintaining constant angular velocity of the driven shaft. The technique is closely related to the synthesis of cams with flat faced oscillating followers. The technique is illustrated by the synthesis of a drive train for increasing the power applied to the rear wheel of a bicycle. The synthesized drive train shows a theoretical 12.6 percent increase in delivered power. Comparisons with published experimental results, as well as a discussion of the assumptions used in the synthesis procedure are included.

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Coupling Properties of Chain Drive System under Various and Eccentric Loads

International Journal of Simulation Modelling ◽

10.2507/ijsimm19-4-535 ◽

2020 ◽

Vol 19 (4) ◽

pp. 643-654

Author(s):

W. J. Ren ◽

L. Wang ◽

Q. H. Mao ◽

S. B. Jiang ◽

S. Huang

Keyword(s):

Transverse Vibration ◽

Dynamic Properties ◽

Longitudinal Vibration ◽

Discrete Element ◽

Drive System ◽

Chain Drive ◽

Eccentric Load ◽

Scraper Conveyor ◽

A Chain ◽

Vibration Rate

The chain drive system is a core subsystem of heavy scraper conveyors. During operation, violent oscillations of fluctuating loads on the chain and uneven loads at the two chain sides are observed, thus intensifying chain wear and even causing chain breakage. The dynamic properties of a chain drive system under various load and eccentric load were discussed thoroughly by combining dynamic and discrete element coupling analyses to improve the reliability of the scraper conveyor. Based on the discrete element method and multibody dynamic theory, a coupling analysis model of a scraper conveyor was constructed, and a simulation analysis on coal conveying process under various load and eccentric load was carried out. Simulation results demonstrate that the transverse vibration of the chain is positively related to coal conveying quantity, whereas longitudinal vibration is negatively correlated to coal conveying quantity. The transverse vibration rate under full loads is 513.62 % higher than that under idle condition, while the longitudinal vibration rate is 53.44 % lower. The effects of coals on transverse vibration and longitudinal vibration of a chain ring are opposite.

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Study on the Optimization Model of a Flexible Transmission

Mathematical Problems in Engineering ◽

10.1155/2019/5084573 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Guodong Zhai ◽

Zhihao Liang ◽

Mingyang Li

Keyword(s):

Optimal Design ◽

Optimization Design ◽

Power Transmission ◽

Design Method ◽

Transmission System ◽

Design Model ◽

Chain Drive ◽

Design And Optimization ◽

Design Component ◽

Excel Solver

A belt drive and a chain drive are the main types of flexible power transmission. In the traditional belt and chain drive design process, engineers need to do a lot of rework to get a design. To solve this problem, taking the Shell Eco-Marathon vehicle as an example, the traditional design and optimization design of the transmission system are carried out. In the optimization design, component optimization and overall optimization design model of the belt and chain drive are first established. Second, the charts in the design manual are converted into formulas by using MATLAB. Finally, an optimization design model is established in Microsoft Excel, and the Excel Solver tool is used to find the optimal design result. The design method proposed in this paper can effectively determine the optimal design of transmission system and provides a new method for the processing of such problems.

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Mechanical transmission system of loader based on hydraulic hybrid technology

Thermal Science ◽

10.2298/tsci2106233w ◽

2021 ◽

Vol 25 (6 Part A) ◽

pp. 4233-4240

Author(s):

Haifei Wang ◽

Shimin Yang ◽

Tan Lu

Keyword(s):

Power Transmission ◽

Control Method ◽

Mechanical Energy ◽

High Energy ◽

Transmission System ◽

Drive System ◽

Mechanical Transmission ◽

Fuzzy Pid Control ◽

Hybrid Technology ◽

Hydraulic Hybrid

In order to solve the problems of high energy consumption, high noise and pollution gas emission existing in the mechanical transmission system of loader, a research on the mechanical transmission system of loader based on hydraulic hybrid technology is proposed. The mechanical energy and heat energy are generated by the mechanical operation of the loader, which are converted into hydraulic energy and output to the drive system. According to the fast response characteristics and high power density characteristics of the hydraulic power system relative to the thermal engine, the dynamic model of the hydraulic hybrid drive system of the loader is established. The double fuzzy PID control method is used to identify and modify the unknown load and power parameters of the drive system. Through the experiment, it is concluded that the power parameter matching of the transmission system using the hydraulic hybrid technology is more optimized, the application effect is good, and the efficiency of the power transmission system can be maximized.

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Structural Optimization of a Chain Transmission with Constraints

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.687-691.523 ◽

2014 ◽

Vol 687-691 ◽

pp. 523-526

Author(s):

Lin Hong ◽

Xiao Juan Li

Keyword(s):

Drive System ◽

Compensation Method ◽

Chain Drive ◽

Transmission Performance ◽

Effect Analysis ◽

Trajectory Simulation ◽

Chain Transmission ◽

Simulation Results ◽

A Chain ◽

Main Factor

Polygon effect is the inherent characteristics of chain drive system, and also the main factor which restricts the transmission performance of the system. In this article a structure related to a slide constraint chain drive is presented and optimized by means of MATLAB optimization toolbox. Based on polygon effect analysis, a compensation method is proposed and verified by trajectory simulation. Simulation results show that the compensation method can effectively reduce the polygon effect of chain drive and improve the transmission performance of the chain drive system.

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