Chapter 18 Driving Axle 日儕大学 TONGII UNIVERSTTY wheel reductor Planetary gear characteristics equation 地虹十0*ng-+*n=业 n central gear speed 工工工 Z:number of central gear teeth n2 ring gear speed Z:number of ring gear teeth n3 planet carrier speed 0=Z2/Z1 >Ratio of planetary gears:i2=1+a 毫 >Ratio of wheel reductor:io=io1X i2Chapter 18 Driving Axle  Planetary gear characteristics equation： n1+a*n2－(1+a) * n3=0 n1：central gear speed Z1：number of central gear teeth n2：ring gear speed Z2：number of ring gear teeth n3： planet carrier speed α=Z2 /Z1 wheel reductor Ratio of wheel reductor：i0= i01 × i02 Ratio of planetary gears：i02= 1+a