本研究目的在於機車有段變速排檔機構的創新設計,此新型的排檔機構係以凸輪機構為主體,可配合馬達同時控制離合器與排檔的作動而變換機車傳動機構的不同檔位。本研究首先分析現有機車有段變速排檔機構及相關專利、期刊文獻等資料,提出以兩組凸輪的連動機構控制離合器及排檔的設計概念,亦即排檔與離合器由單一輸入作驅動控制,並藉由此設計概念設計出連動機構控制排檔的創新設計構想。為配合排檔時所需的運動需求,本研究選擇多項式曲線設計新型機構的驅動凸輪,並實際量測現有機車各檔位的作動方式與範圍,為凸輪設計時的邊界條件,並完成新型排檔機構之尺寸設計與實體模型的建構,最後完成新型排檔機構的動態模擬分析。模擬分析結果顯示,本研究所提出的新型排檔機構能符合機車排檔的變速控制要求,本研究結果可為未來發展機車有段變速排檔機構的重要參考。
The purpose of this research proposed a new design of motorcycle manual transmission shift mechanism. The cam mechanism is the main part of this novel design; it can control clutch and shift gear with electrical motor at the same time. In this research, analyzing the existing motorcycle manual transmission shift mechanisms, related patents and reports first. Then proposing the design concept, which clutch and shift gear are controlled by two cams joined on one shaft; it means shift gear and clutch are driven by single input. Based on this design concept, this novel design of motorcycle manual transmission shift mechanism is proposed. For kinematic requirements of shift gear, the cam profile is designed with polynomial curve, and the design boundary condition is achieved by measuring the existing motorcycle. Then the basic dimensions of this new design are identified. Finally, the 3D model is constructed and dynamic simulation is finished. The simulation results shown the novel shift mechanism is satisfied for the motorcycle shift gear requirements. The results of this research are expected an important reference for the design of motorcycle manual transmission shift mechanism.