本研究之目的在於設計二輪車輛的新型連桿式防俯衝懸吊機構。首先簡述二輪車輛的俯衝問題，並介紹影響車體的主要指標參數以及現有的防俯衝裝置。接著由簡化的車體模型推導煞車時前、後輪荷重的改變量及其影響俯衝的程度，並推導動態防俯衝指標角度。再者，應用品質機能展開法，訂定設計時所需的工程目標，將使用者需求轉換為可以量化的工程需求與限制。本研究以一美國專利做為現有設計，應用顏式創意性機構設計法配合設計需求與限制得到16種可行機構，並利用決定矩陣法評估出一組最可行的新型機構，據此完成新型機構的尺寸設計，並用動態防俯衝指標角度檢驗新型機構的防俯衝效果。最後，藉由繪製3D模型模擬真實運動狀況驗證此機構是可行的。

This study provides a systematic design approach of new linkage type anti-dive suspension mechanisms for two wheels vehicles. At first, the dive problem of existing two wheel vehicles is introduced, the effect of chassis’s major parameters is introduced, and existing anti-dive devises are also introduced. By the simplified chassis model, the changing loads on front wheel and rear wheel are calculated, and the effect by the changing load on dive phenomenon is discussed. The kinematic anti-dive behavior angle is calculated from the mechanical viewpoint. Based on the existing design with 9-bar and 11-joint suspension mechanism, the design requirements and design constraints are concluded. In addition, Yan’s creative mechanism design methodology is applied to generate 16 design concepts systematically in which 15 are feasible new suspension mechanisms. A suitable mechanism is selected for dimension synthesis by decision matrix method. The anti-dive efficiency of new mechanism is checked by the function of kinematic anti-dive behavior angle after dimension synthesis. Finally, based on the dimensions of new mechanism, the corresponding 3D model is built and the proposed design is proved to be feasible.

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