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CSME 2019/04
Volume 40 No.2
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109-118
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A Novel Worm Drive via Selecting the Segments of Tooth Profile Helix
Jie Yanga and Deng-zhou Hub
aSchool of Mechanical Engineering, Xihua University, No. 999 Jinzhou road, Jin-niu district, Chengdu, Sichuan, China
bDepartment Of Aviation Manufacturing Engineering, Chengdu Aeronautic Polytechnic, No. 699 Checheng east seven road, Long quan-yi district, Chengdu, Sichuan, China
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Abstract:
In order to research a new worm drive modeling design method, and achieve the purpose of simplifying design, taking the anti-backlash planar enveloping endface meshing toroidal worm drive for example, this study firstly seeks to investigate a new method of constructing the worm tooth profile helical line, according to the characteristic of the planar enveloping hourglass worm tooth profile structure, which can be formed a tooth profile helical line similar to the spiral cocoon when the varying parameter of planar external gear rotational angle c is equal to 4π, and adjusting c value to 1.2π and 0.3π respectively, the left and right end-faces tooth profile segments in the spiral cocoon can be selected to construct the bilaterally symmetric worms. Secondly, the effects of the main design parameters on the meshing performances of this novel worm drive are investigated, it is figured out except for the transverse module, the significant influence is given to improve the meshing performance by increasing inclination angle of planar external gear and radius of base circle. Lastly, the prototype machine is manufactured based on this worm forming principle, and the corresponding tests are carried out. This paper provides a new reference for the follow-up research of worm drive to a certain extent.
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Keywords: Novel modeling method, spiral helix cocoon, tooth segments, meshing performance, prototype machine.
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©
2019
CSME , ISSN 0257-9731
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