Kinematic synthesis of a combined lambda-type mechanism
DOI:
https://doi.org/10.32347/2410-2547.2026.116.275-282Keywords:
kinematic synthesis, lambda-type mechanism, geometric parameters, output link, motion trajectoryAbstract
The paper considers the process of kinematic synthesis of a combined lambda-type mechanism with an interval of quasi-linear motion of the coupler point, which belongs to third-class straight-line guiding mechanisms. The relevance of the study is determined by the widespread application of lambda-type mechanisms in modern mechanical engineering, where they enable the realization of complex motion trajectories with a relatively simple design and convenient control. The proposed combined mechanism provides motion of the coupler point in both forward and return strokes along a quasi-linear trajectory, which significantly expands its functional capabilities.
In the course of the research, the deviation of the quasi-linear trajectory from an ideal straight line was analyzed. It was established that the maximum nonlinearity is only 1%, which indicates high accuracy of the realized motion. In addition, it was determined that the maximum length of the quasi-linear interval reaches 400% of the crank length, which is a significant indicator for mechanisms of this class and confirms the efficiency of the selected kinematic scheme.
Based on the performed synthesis, optimal geometric parameters of the combined lambda-type mechanism were determined, under which full correspondence of the coupler point trajectory to the straight-line interval of the base mechanism is ensured. A distinctive feature of the proposed solution is the preservation of straight-line motion in both forward and return strokes, which creates the prerequisites for a significant increase in the productivity of machines and mechanisms using this kinematic structure.
The obtained results can be used in the design of highly efficient mechanical engineering systems, where motion accuracy, compact design, and increased operating speed are essential.
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