ELIMINATION OF REDUNDANT CONSTRAINTS IN A RICE SORTING MACHINE WITH A CAM-TYPE ELASTIC ELEMENT IN THE TRANSMISSION MECHANISM

Abstract

 This article provides a detailed analysis of the operating principle and structure of a cam mechanism with a flexible element, which is used in the drive system of an eccentric rice sorting machine. The study reveals a change in the law of motion resulting from the deformation of the flexible cam during operation, in contrast to existing rigid cam mechanisms. It is substantiated that this deformation leads to the emergence of redundant constraints within the mechanism, which negatively impacts its operational process, accuracy, and efficiency. In light of this, methods for reducing and eliminating these redundant constraints are considered. Specifically, it presents the potential for improving contact conditions, ensuring even load distribution, and increasing the mechanism's reliability by replacing higher kinematic pairs with lower ones. Furthermore, the influence of the flexible element's deformation on the mechanism's geometric parameters is studied in-depth, and expressions are provided that account for dimensional changes in the main links, such as the rocker arm, connecting rod, and crank. These expressions are significant for the design and optimization of the mechanism, enabling calculations that more closely approximate real operating conditions.