摘要
为了提高齿轮的传动能力,研究少齿非对称渐开线直齿轮的设计方法。采用齿条刀具的切向变位,设计非对称双圆角齿条刀具,推导包括变位的非对称齿轮全齿廓直角坐标方程和无侧隙啮合条件。分析非对称渐开线少齿数齿轮的根切现象,求解不同齿数的齿轮根切点压力角。采用基于少齿数的非对称渐开线直齿轮主动设计方法计算不同齿数齿轮副啮合的参数以及所能达到的最大传动重合度。研究结果表明:采用主动设计方法,齿轮能达到最大的传动重合度;当小齿轮齿数为4时,大齿轮的最小齿数为7。
In order to improve the gear capacity,asymmetric involute gear based on small teeth was discussed.Tangential modification with rack cutter was used,asymmetric rack cutter with double radii was designed,and total tooth profile equations with modification and no lateral clearance meshing for the asymmetric gear were derived.Undercut phenomenon for asymmetric involute gear with small number of teeth was analyzed.The pressure angle at undercut point with different numbers of teeth was solved.Using the direct design method for asymmetric involute gear with small number of teeth,the gearing mesh parameters and the maximum contact ratio were calculated.The results show that the maximum contact ratio can be obtained using the direct design method.The minimum number of gear tooth is 7 when the pinion teeth number is 4.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期955-962,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51275035)
冶金研究基金资助项目(YJ2010-007)
关键词
切向变位
少齿数
主动设计
根切
tangential modification
small number of teeth
direct design
undercutting
