论文部分内容阅读
随着机械工业的飞跃发展,对机械传动的要求越来越高,要求齿轮传动速比大、效率高、结构紧凑。于是在啮合副中小齿轮的齿数竟达z_1=8.10,对于标准齿轮(齿顶高系数h_a~*=1,原始齿形角a=20°)而言,当齿数z<17时便要产生根切,对于这样少的齿数的齿轮,非进行变位不可,目前国内对于小齿轮齿数z_1=8.10而组成的外啮合齿轮副,变位系数的选择未有专述。变位系数选择的方法很多,很多国家有自己的标准制度与规范。常用的方法有查表法、线图法及
With the rapid development of machinery industry, the requirements for mechanical transmission are getting higher and higher, requiring large gear ratio, high efficiency and compact structure. Therefore, the number of teeth of the pinion gear in the meshing gear reaches z_1 = 8.10. For the standard gear (tooth top height coefficient h_a ~ * = 1, original tooth profile angle a = 20 °), roots are generated when the tooth number z <17 Cut, for such a small number of teeth of the gear, non-displacement is not, the current domestic small teeth for gear z_1 = 8.10 composed of external gear pairs, the coefficient of choice has not been specifically described. There are many ways to choose the coefficient of variation, many countries have their own standard system and norms. The commonly used methods are table look-up method, line graph method and