已知一对正确安装的渐开线标准直齿圆柱齿轮传动,中心距a=100 mm,模数 m=2 mm,压力角α=20°。传动比i=ω1/ω2=1.5,齿轮2的分度圆、基圆、齿顶圆、齿根圆直径分别为:
A.
d 2 =118 mm , d b2 =112.346 mm , d a2 =98 mm , d f2 =93 mm
B.
d 2 =110 mm , d b2 =102.346 mm , d a2 =118 mm , d f2 =113 mm
C.
d 2 =80 mm , d b2 =75.175 mm , d a2 =84 mm , d f2 =75 mm
D.
d 2 =120 mm , d b2 =112.763 mm , d a2 =124 mm , d f2 =115 mm