| Citation: | REN Jihua, SHI Zhaoyao, WANG Defeng, et al. Method of unequal pitch meshing of metal worm and plastic helical gear[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(6): 979-985. doi: 10.13700/j.bh.1001-5965.2020.0690(in Chinese)
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In order to further improve the bearing capacity of plastic gears in the transmission of metal worm and plastic helical gears, the force characteristics of the traditional equal-pitch worm helical gear meshing transmission were studied in depth, and the unequal pitch meshing of the worm and the helical gear was innovatively proposed. Based on beam bending theory and gear tooth deformation theory, the relationship between tooth surface load, deformation and contact stiffness is obtained.On the premise that the bending deformation rate of the gear tooth root is equal, the theoretical design method of unequal meshing is deduced, and the pitch adjustment of the worm in the case of unequal pitch meshing is obtained, which is verified by static strength experiments.The experimental results show that the unequal pitch design can increase the load-bearing capacity of the plastic helical gear by 13.69%.
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