External high-order multistage modified elliptical helical gears and design procedure of their gear pairs

被引:9
作者
Han, Jiang [1 ]
Liu, Youyu [1 ,2 ]
Li, Dazhu [1 ]
Xia, Lian [1 ]
机构
[1] Hefei Univ Technol, Sch Mech & Automot Engn, Tunxi Rd 193, Hefei 230009, Peoples R China
[2] Anhui Polytech Univ, Middle Beijing Rd, Wu Hu, Peoples R China
基金
中国国家自然科学基金;
关键词
Non-circular gears; external gears; high-order multistage modified ellipse; helical gears; gear pairs; LINKAGE; MODELS;
D O I
10.1177/0954406215603738
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In view of the limited quantity of modified segments for high-order and two-stage modified elliptical helical gears, and poor adjustment capacity for transmission ratio, the formation mechanism of a high-order multistage modified ellipse was studied, and a unified mathematical expression of the family of ellipses was derived. Thus, a design procedure for the helical gear pairs of the high-order multistage modified ellipse was suggested, and then their transmission characteristics were discussed exhaustively. Moreover, some checking methods such as curvature radius of pitch curve, convexity, pressure angle, undercutting, and contact ratio were offered. Finally, two design cases, including two-order and three-stage modified elliptical helical gear pair and two-order and four-stage one, were implemented. The cases indicate that a high-order multistage modified elliptical helical gear can be utilized in practice.
引用
收藏
页码:2929 / 2939
页数:11
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