上海充通大学 Types of Gear trains Compound Train Design 2 是) @ou N If N2=N,and N3=Ns 3 Reduction ratio out →品) 5 Will be used to determine the no.of stages given a reduction ratio 2 stages 上海充通大粤 Types of Gear trains Compound Train Design Design train with gear ratio of 180:1 ·Two stages have ratio√8o-l3.4164 too large Three stages has ratio 180=5.646 →贷)=56 ·At14 teeth Pinion Teeth ratio Gear teeth actual ratio is 9 12 5.646 67.7546 =179.6789 13 5.646 73.4008 OK for power 14 5.646 79.0470 transmission; not for phasing 15 5.646 84.6932 16 5.646 90.33957 Compound Train Design ωin ωout 2 3 4 5 2 4 3 5 in out N N ω ω N N           If N2=N4 and N3=N5 2 2 3 in out N ω ω N        2 3 2 in out ω N ω N        Reduction ratio 2 stages Will be used to determine the no. of stages given a reduction ratio Types of Gear trains • Design train with gear ratio of 180:1 • Two stages have ratio too large • Three stages has ratio • At 14 teeth actual ratio is • OK for power transmission; not for phasing 180 13.4164 180 5.646 3  Pinion Teeth * ratio Gear teeth 12 5.646 67.7546 13 5.646 73.4008 14 5.646 79.0470 15 5.646 84.6932 16 5.646 90.3395 179.6789 14 79 3        3 3 2 180 5.646 N N         Compound Train Design Types of Gear trains