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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30 , No. 5

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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 5, pp. 396-401
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Oct 2021
Received 08 Jul 2021 Revised 19 Jul 2021 Accepted 09 Aug 2021
DOI: https://doi.org/10.7735/ksmte.2021.30.5.396
원형 디스크 방식 기어변속 시스템 개발에 관한 연구
임도균^a ; 이규한^a ; 강태원^a^{, *}

A Study on the Development of a Circular Disk Type Gear Shift System
Do Kyun Lim^a ; Gyu Han Lee^a ; Taewon Kang^a^{, *}
aDepartment of Mechanical & Biomedical Enginering, Kangwon National University
Correspondence to : ^*Tel.: +82-33-250-6311 E-mail address: jirehk@kangwon.ac.kr (Taewon Kang).

Abstract

This study proposes a new design of a gear shift system in bicycles. This new design solves issues of the conventional system having many inconveniences. In the proposed system, we replace the chain connecting two wheels of bicycles by introducing a circular disc-type gear shift system. In order to transfer the force to shift gears appropriately, a complicated pinion was designed. Computer analysis using Abaqus was conducted to predict the stability and durability of the proposed system. The results were reviewed with those of the actual tests performed under specially designed test jigs. We show that this chainless gear shift system developed in the study is usable in regular bicycles. Especially, we note that the proposed system effectively solves the existing problems in bicycles.


Keywords: Bike, Simulation, Chainless, Circular disc, Durability

References


1.	Yoon, W. S., Kim, D. H., Kim, H. S., 2016, Optimization of Lightened Fiber-Reinforced Composite City & Trekking Bicycle Frame, Trans. Korean Soc. Mech. Eng. A, 40:2 147-156.
2.	Cho, C. K., Yun, M. H., Yoon, C. S., Lee, M. W., 1999, An Ergonomic Study on the Optimal Gear Ratio for a Multi-speed Bicycle, Int. J. Ind. Ergon., 23:1-2 95-100.
3.	Cho, K. H., 2016, Disc-shaped Bicycle Gear Shifting Device, KR Patent: 10-2016001-9525.
4.	Abaqus, n.d., viewed 8 June 2020, Abaqus 6.13 documentation, <http://130.149.89.49:2080/v6.13/index.html>.
5.	Adams, n.d., viewed 8 June 2020, Adams 2013 documentation, <https://simcompanion.mscsoftware.com/infocenter/index?page=content&cat=1VMO50&channel=DOCUMENTATION>.
6.	Kwon, S. M., Park, Y. S., 2020, Strength Design of Slewing Drive Pinion for Ship Unloader, J. Korean Soc. Manuf. Technol. Eng., 29:5 386-392.

Do Kyun Lim

M.S. Student in the Department of Advanced Mechanical Engineering, Kangwon National University. His research interest is Machine work.

E-mail: wooier@kangwon.ac.kr

Gyu Han Lee

Ph.D. Student in the Department of Advanced Mechanical Engineering, Kangwon National University. His research interest is Computational Simulation.

E-mail: lgh0321@kangwon.ac.kr

Taewon Kang

Professor in the Department of Advanced Mechanical Engineering, Kangwon National University. His research interest is the analysis of mechanical system.

E-mail: jirehk@kangwon.ac.kr