等高齿对数螺旋锥齿轮小端齿顶宽修正研究

Discussing the Little End Addendum Too Narrow of High-tooth Logarithmic Spiral Bevel Gear Problem

等高齿对数螺旋锥齿轮其齿向线采用对数螺旋线,与格里森制渐缩齿及奥利康制等高齿相比,在齿长方向其螺旋角处处相等。因此其重合度得以提高,从而可以提高其传动平稳性,降低运转噪音。在实际应用中,当采用等高齿—齿高沿分锥相等时,会出现小端齿顶过窄问题。对该问题进行了详细分析,并且根据推导的公式,给出了相应的修正实例。从实例的计算结果得出,在变位系数增大的情况下,齿轮的小端齿顶宽确实得到了增大,可见这里的公式推导的正确性。

High-tooth logarithmic spiral bevel gear whose teeth to the line using the logarithmic spiral,compared with the Gleason system tapered and Oerlikon system constant-depth,which helix angle in the direction of tooth length equal everywhere.Therefore,the degree of coincidence can be improved,which can improve the smooth transmission,and reduce operating noise.In practical application,when using high-tooth—tooth depth along the sub-cone equal,there will have a problem that little end addendum too narrow.In this paper,we analysis of the problem-little end addendum too narrow and according to derive formulas,we gives the corresponding correction instance.Calculated results from the instance,in the case of modification coefficient increases,the little end addendum of the gear get a larger top width,which we see the text in the accuracy derivation.