标题: | 变速自行车链条设计 Design of Chains on Multi-speed Bicycle |
作者: | 张崇铭 Chung-Ming Chang 曾锦焕 Ching-Huan Tseng 机械工程学系 |
关键字: | 链条;飞轮;变速自行车;宽度缩减;机构;chain;procket;multi-speed bicycles;reduction of chain width;mechanism |
公开日期: | 2003 |
摘要: | 本论文主要研究对象为自行车上传动系统中的链条元件,由于自行车飞轮受到车架、骑乘姿势所形成的空间限制,必须在有限空间内增加飞轮片数增加齿数比,达到变速换档的舒适性。因此,为了配合这样紧密的飞轮,链条宽度的缩减是必须的。经过专利的整理后,确定空间尺寸和强度为初步设计的主要需求;提出不同的概念设计,并利用新的链条连结机构来达到链条宽度的缩减。 本文提出概念设计较目前市面上自行车最窄的链条宽度更窄,;强度部份利用有限元素分析法做定性分析,比较各个设计的相对强度;此外也经由原型的制作,检视其机构的问题。 This study focuses on the chain for the multi-speed bicycle. Design space for the freewheel on bicycle is limited by frame, riding posture, etc. However, the number of gear ratios in this design space increased with added more sprockets are the trend on the bicycles. Therefore, reduction of chain width is necessary for working with this compact freewheel,. Space and strength are main requirements in the beginning of design according to literatures and patents review. Several new concepts are proposed, and these concepts use the linkage mechanism to achieve the reduction of chain width. Chain width of these concepts proposed in this study can be reduced under the assumption for fixed design space and thickness of sprockets. The finite element method is used to compare the trend of strength among these concepts. Mechanism problem for the concept design can observe from the prototype. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009114504 http://hdl.handle.net/11536/47301 |
显示于类别: | Thesis |
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