자전거용 원터치 탈부착 전기구동장치의 디자인 개발

Abstract

Recently, as the sense of crisis due to the depletion of fossil fuels and global warming has become greater, the need for eco-friendly transportation has emerged as a very important social issue. Among them, bicycles do not use any fuel or emit any pollutants, so they are used as a useful means of movement, transportation, and exercise. Recently, as the function of bicycles as a means of transportation due to frequent traffic congestion has been highlighted, interest in electric bicycles is also increasing. . In particular, it is true that electric bicycles are heavy and expensive, which puts a huge burden on purchasing them. Therefore, although detachable electric drive devices have been developed, they are not preferred due to many problems with detachment. In this study, a detachable electric drive device that can convert a regular bicycle into an electric bicycle according to the driver's needs was selected as the research object, but the existing detachable electric drive device that must use a connecting means called a bracket because the front and rear wheels and chain sprocket must be driven directly. By proposing a detachable electric drive device that directly drives the chain, taking a completely different perspective from the electric drive device, we would like to propose an electric drive device design that allows the electric drive device to be attached and detached to a bicycle without using a bracket. First, through theoretical consideration, the concept and characteristics of a bicycle, the structure of a bicycle, the main elements for driving a bicycle, the concept and characteristics of an electric bicycle, types of electric bicycles by driving method, analysis of the driving method of an electric bicycle, and the We conduct research on the market status, concepts and types of detachable electric drive devices, and analysis of detachable electric drive devices, find design improvement elements through surveys, and then directly drive the chain through design direction setting and design layout. By analyzing the external and functional elements of the electric drive system, the optimal design of the detachable electric drive system was derived, and through the final blueprint proposal, final design proposal, and final design 3D modeling process, it can be universally used on many bicycle frames without using brackets. A mass-produced design result was created for a chain-driven electric drive device that can be combined and detached with one touch, and can ensure user convenience and visibility for safety.