Design and simulation of flat mechanism driven by eccentric gear

초록

To achieve the approximately constant-speed motion law of the cover plate in the cover plate grinding machine during the working stroke, a combined mechanism composed of a first-order modified eccentric gear, a second-order conjugate non-circular gear and a concentric crank-slider mechanism connected in series to drive the cover plate mechanism was proposed in this paper. To analyze the motion characteristics of the proposed cover plate driving mechanism, the mathematical model of the mechanism was established by using geometric relationships and numerical analysis, and the design and analysis software of the driving mechanism was developed by using Matlab. The influence laws of eccentricity and variation coefficient on the motion characteristics of the cover plate were analyzed. Taking the minimum mean square error of the speed ratio of the output component (cover plate) and the input component (eccentric gear) as the optimization objective, the genetic algorithm was used to optimize the design of the proposed cover plate mechanism, and a set of design parameters were selected for example design. The virtual prototype simulation test was conducted for verification. By comparing the test results with the theoretical calculation results, the feasibility of the proposed driving mechanism was verified. It provides a new idea for the innovative design of the cover plate grinding machine. © 2025, Wool Textile Journal Periodical Agency. All rights reserved.

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