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圆弧齿轮的原始齿型是决定齿轮承载能力的重要因素。在双圆弧齿轮原始齿型设计中,为了提高接触强度,常常采用增大齿高而加大工作弧长的办法;为了提高弯曲强度,常常采用降低齿高并选取最佳齿厚比的办法;因此要进行权衡取舍,同时还要兼顾其它参数。本齿型是采取适量增大偏移距的方法。即适量增大偏移距,不但仍符合啮合条件,且可使压力角显著减小;同时也使同一齿上两个同时接触点距离q_(TA)增大;还较易获得合适齿厚比;因而可达到同时提高接触强度和弯曲强度的目的。
The original tooth profile of arc gear is an important factor that determines the bearing capacity of the gear. In the double circular arc gear tooth design, in order to improve the contact strength, often increase the tooth height and increase the working arc length approach; in order to improve the bending strength, often used to reduce the tooth height and choose the best ratio of tooth thickness ; Therefore, to make trade-offs, but also take into account other parameters. The tooth is taken to increase the amount of offset method. That is, the amount of offset increase, not only still meet the conditions of engagement, and can significantly reduce the pressure angle; also make the same tooth two contact points at the same time the distance q_ (TA) increases; also easier to get a suitable tooth thickness ratio ; Thus achieving the purpose of simultaneously improving the contact strength and the bending strength.