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研究生： 杜文鍾
Do, Van-Chung
論文名稱： 具一個齒輪對新型越野摩托車後懸吊機構之設計
On the Design of A New Rear Suspension for Motorcrosses with A Gear Pair
指導教授： 顏鴻森
Yan, Hong-Sen
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
論文出版年： 2011
畢業學年度： 100
語文別： 英文
論文頁數： 61
中文關鍵詞： 後輪懸吊機構 、槓桿比 、越野摩托車 、創意性機構設計 、齒輪對
外文關鍵詞： rear suspension mechanism, leverage ratio, motorcross, gear pair, creative mechanism design
相關次數： 點閱：127  下載：7 
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    • 本研究探討具一個齒輪對之新型越野摩托車後輪懸吊機構的槓桿比，並提出一系統化的設計流程。首先，根據專利搜尋，找出現有的五連桿、六連桿、及八連桿越野摩托車後輪懸吊機構。接著，考慮設計需求及設計限制，利用顏式創意性機構設計方法，合成出具一個齒輪對的新型五連桿懸吊機構。再透過運動特性分析，選定一組可行設計，以最佳化方法合成出機構的幾何尺寸。根據懸吊機構槓桿比的定義，分別計算出Honda公司Pro-link機構及新型五連桿懸吊機構的槓桿比。經過比較，具一個齒輪對之新型五連桿懸吊機構的槓桿比優於Pro-link機構。最後，以此機構之運動尺寸，建構出新設計的3D模型。

    This study presents a systematic design procedure to acquire new and better leverage ratio rear suspension mechanisms with a gear pair for motorcrosses. Firstly, based on the patent search techniques, existing designs of the 5-bar, 6-bar, and 8-bar linkage rear suspension mechanisms are studied; the design requirements and design constraints from the view point of the designers are considered; and Yan’s creative mechanism design methodology is applied to generate new 5-bar linkage rear suspension mechanisms with a gear pair. Secondly, a design concept is selected to analyze the kinematic characteristics. Furthermore, the dimensions of links of the chosen mechanism are analyzed by using the optimum design method. Thirdly, according to the definition of the leverage ratio which is applied for rear suspension mechanisms, the leverage ratio of the Honda Pro-link mechanism and the new selected 5-bar rear suspension mechanism with a gear pair are calculated and compared. And, it is proved that the proposed new mechanism with a gear pair performs better than the design of Honda Pro-link in leverage ratio. Finally, 3D model of the new design is constructed based on the mechanism’s kinematic dimensions of mechanism.

    摘要 i ABSTRACT ii ACKNOWLEDGEMENT iii CONTENTS iv LIST OF FIGURES vii LIST OF TABLES ix Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Objectives 2 1.3 Literature Review 2 1.4 Thesis Organization 4 Chapter 2 Existing Designs 6 2.1 Historical Development 6 2.2 Topological Structure of Existing Designs 12 2.3 Kinematic Analysis of the Honda Pro-link Mechanism 13 2.3.1 Topological structure 14 2.3.2 Position analysis 15 2.3.3 Velocity analysis 18 2.3.4 Acceleration analysis 20 2.4 Leverage ratios 20 Chapter 3 Conceptual Design 26 3.1 Design Procedure 26 3.2 Structural Synthesis 28 3.2.1 Generalized kinematic chains 28 3.2.2 Design requirements and design constraints 29 3.2.3 Specialized chains 30 3.2.4 Atlas of new designs 37 Chapter 4 Kinematic Analysis 38 4.1 Position Analysis 38 4.2 Velocity analysis 43 4.3 Acceleration Analysis 44 4.4 Leverage ratio 45 Chapter 5 Dimensional Synthesis 47 5.1 Optimization Method 47 5.2 Dimensional Synthesis of the Honda Pro-link Rear Suspension Mechanism 48 5.3 Dimensional Synthesis of the New 5-bar Linkage with a Gear Pair 51 5.4 3D Model of the New 5-bar Linkage with a Gear Pair 54 Chapter 6 Conclusions and Suggestions 56 6.1 Conclusions 56 6.2 Suggestions 57 REFERENCES 58 VITA 60 自述 61

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