在齿轮轮齿弯曲强度计算中,齿根危险截面上的弯曲应力为■式中K为载荷系数,F_f为齿轮圆周力,b为齿宽,m为齿轮模数,α为分度圆压角,α_F为齿顶压力作用线与轮齿对称中线之夹角的余角,h_F为弯曲力臂,S_F为危险截面处的弦齿厚(图 In the calculation of the gear tooth bending strength, the bending stress on the root dangerous section is ■ where K is the load factor, F_f is the gear circular force, b is the tooth width, m is the gear modulus, α is the angle of the indexing circle , α_F is the corner angle between the crest pressure action line and the symmetrical center line of the gear tooth, h_F is the bending moment arm, and S_F is the chordal tooth thickness at the dangerous section