Evaluation of Load-bearing Capacity of Cycloid-pin Gear Mechanism in RV Reducer

ZHOU Jianhui; WEI Tengyue; JIANG Mingsong; ZHANG Kai

doi:10.19554/j.cnki.1001-3563.2026.01.019

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (1) : 169-177. DOI: 10.19554/j.cnki.1001-3563.2026.01.019

Automatic and Intelligent Technology

Evaluation of Load-bearing Capacity of Cycloid-pin Gear Mechanism in RV Reducer

ZHOU Jianhui¹, WEI Tengyue², JIANG Mingsong³, ZHANG Kai^2,*

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Abstract

The work aims to propose a load-bearing performance evaluation model to evaluate the load-bearing capacity of the cycloid-pin gear transmission mechanism of RV reducers with different models and sizes, and study the impact of pin tooth radius, pin tooth distribution circle radius and eccentricity on the dynamic load-bearing capacity of the mechanism, so as to deal with the weak load-bearing capacity and unclear evaluation standards of domestic RV reducers. Based on the meshing transmission relationship of cycloid-pin gear mechanism, the dynamic load distribution and dynamic stress distribution functions of the cycloid teeth under load were established. An eccentric shaft stiffness calculation model was established through the relationship of force between the cycloid gear and the eccentric shaft. The load-bearing capacity evaluation model of the cycloid-pin gear mechanism was established by comprehensively considering the meshing of the cycloid-pin gear and the stiffness of the eccentric shaft. It was pointed out that the eccentricity had a great influence on the three characterization factors of the dynamic load distribution coefficient, the dynamic maximum contact stress of the cycloid gear and the eccentric shaft stiffness. Within the research scope, the average variation of the load-bearing evaluation coefficient was 0.002 3, 0.003 3 and 0.042 5 for each 0.1 mm change of the pin tooth radius, the pin tooth distribution circle radius and the eccentricity. Eccentricity has the greatest influence on the load-bearing capacity evaluation, and the dynamic maximum contact stress is the most important factor to evaluate the bearing capacity of the cycloid-pin gear transmission mechanism. The load-bearing capacity evaluation model established in this study provides a theoretical basis for the bearing capacity evaluation and design parameter optimization selection of the cycloid-pin gear transmission mechanism of RV reducers.

Key words

rotary vector reducer / cycloid-pin gear transmission / evaluation of load-bearing capacity

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ZHOU Jianhui, WEI Tengyue, JIANG Mingsong, ZHANG Kai. Evaluation of Load-bearing Capacity of Cycloid-pin Gear Mechanism in RV Reducer[J]. Packaging Engineering. 2026, 47(1): 169-177 https://doi.org/10.19554/j.cnki.1001-3563.2026.01.019

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