Turning- block機構設計與其機械效益之理論分析

Abstract

此研究敘述一對於turning block機構設計在一特定的旋轉角度下所得的最大機械效益之全新且完整的解。 此法對於turning block連桿尺寸作最佳化的設計。 當力矩對曲柄所走過的角度作積分時會得到一決定最大機械效益的能量形式, 而最佳化的設計即是在數學上取此能量形式的靜態值(極限值)。 此研究結論可滿足此機構設計高精準度與高扭力的要求。

This study describes a novel and complete solution for turning-block design with particular reference to the maximal average mechanical advantage over a specific swing angle span of the output link. The method yields an optimal set of link lengths for the turning-block mechanism. The torque was integrated with respect to the crank swing angle that yields a transmission energy form to maximize the average mechanical advantage. The optimal design solution is determined from the stationary value of the transmission energy. Results of this study can provide a valuable reference for efforts to achieve the high precision and high torque required in the mechanical design.