Mechanical Model on the Driving Mechanism of Combine's Cutting Section and Verification

Abstract

Crank mechanism has been mainly adopted in the driving mechanism of Combine's cutting section which is arising the main vibration. The balance weight is usually used for reducing unbalanced force of Combine's cutting section from the viewpoint of simple structure and low cost. However, the calculating method of optimum balance weight has not been proposed yet. The purpose of this study is to propose the principle for the design theory about reduction of the vibration of Combine's cutting section through the comparison between the proposed mechanical model on the driving mechanism of cutting section and experimental results of vibration in real cutting section. From the result of experiment, it was indicated that the characteristic of vibration of real cutting section was collision vibration (nonlinear vibration) that was different from the model we proposed, so we analyzed the unbalanced force of cutting section by chaos time series analysis.