可調衝程之凸輪機構設計與分析

Design and Analysis of Variable Parameter Cam Mechanism

林柄宏(Bing-hung Lin)

指導教授 ： 徐孟輝

崑山科技大學/工程學院/機械工程研究所/碩士(2007年)

摘要

凸輪機構主要組成元件有凸輪、從動件及機架。在凸輪旋轉過程中，凸輪能準確的驅動從動件輸出預期的運動。傳統上若要改變凸輪機構運動特性，必須重新設計一個新凸輪。事實上，凸輪機構從動件位置改變亦會改變機構運動特性。所以本研究在不變更原始凸輪輪廓的條件下，探討與分析凸輪機構的從動件位置變更對運動特性的影響。藉由改變凸輪機構相關參數，如從動件偏置量、搖臂長度等，應用向量法來分析參數改變前後對凸輪機構的運動特性變化。本研究針對直動式滾子型、直動式平板型與擺動式滾子型從動件等三種類型的凸輪機構作分析與探討，推導參數改變前後對凸輪機構的運動特性方程式，並列舉設計實例驗證本文所提理論的可行性。應用本文所提理論設計一組可變器門正時機，確實達到改變汽門衝程的目的。

關鍵字

凸輪機構

並列摘要

Cam mechanism is mainly composed of cam, follower, and frame. As cam moving, the follower is exactly driven to produce desired motion. Traditionally, the motion characteristics of cam mechanisms are desired to change, a cam will redesigned. In fact, when the position of the follower varying, the motion characteristics of cam mechanisms varying, too. Hence, the purpose of this work is to investigate and analyze the motion characteristics described the designed parameters such as the position, direction of the follower. This work derived the motion equations of the three different cam mechanisms described by designed parameters. By using the provided theory, this work designed a valve-timing mechanisms that can achieve a variable stroke design. The results prove the provided theory of this work is feasible.

並列關鍵字

cam mechanism

參考文獻

[1]顏鴻森，機構學，東華書局，1997初版。

[2]Lanni, C., Ceccarelli, M.,and Figliolini, G., ”An Analytical Design for Three Circular-Arc Cams,” Mech. Mach. Theory,Vol37 PP.915-924, 2002

[3]Qiu, H., Lin, C., Li, Z., Ozaki, H., Wang, J., and Yue, Y.,”A Universal Optimal Approach to Cam Curve Design and its Applications,” Mech. Mach. Theory,PP.669-692 2005

[4]Lampinen, J.,“Cam Shape Optimisation by Genetic Algorithm,” Computer-Aided Design 35 ,PP.727–737, 2003

[5]Wu, L. I., Wu, S. H. and Yan, H. S., ” Simplified Graphical Determination of Disk-Cam Curvature” Mech. Mach. Theory , PP. 1023-1036, 1999