已知某单级闭式直齿圆柱齿轮传动的模数m=4mm,齿数z 1 =25,z 2 =73,输入功率P=10kW,输入转速n 1 =720r/min,承受中等冲击载荷(K=1.4),双向传动,小齿轮的σ Hlim1 =560MPa,σ FE1 =190MPa,大齿轮的σH lim2 =380MPa,σ FE2 =140MPa,S H =1,S F =1.2,齿形系数Y Fa1 =2.70,Y Fa2 =2.25,应力集中系数Y Sa1 =1.38,Y Sa2 =1.8,齿宽b 1 =85mm,b 2 =80mm,z H =2.5。问该传动的强度是否满足要求? 提示:应用接触强度校核公式与弯曲强度校核公式。