Chapter 18 Driving Axle 同©大学 double reduction final drive TONGII UNIVERSTTY >When larger ratio is required only a pair of gears lead to bigger size 第一级主动锥齿轮轴 and can not satisfy minimum ground clearance,then two pairs 轴承座 of gears are used,that is double reduction final drive 第一级主动锥齿轮 主减速器壳 Axle ratio iZ/ZX Z/Z3 第二级主动齿轮 中间轴 characteristics 轴承盖 第一级从动锥齿轮 >Two-stage transmission; >Higher ground clearance with larger ratio; >It can replace different gears to 差速器壳 achieve different transmission ratios, 第二级从动齿轮 后盖 increasing commonality of parts.Chapter 18 Driving Axle double reduction final drive When larger ratio is required only a pair of gears lead to bigger size and can not satisfy minimum ground clearance，then two pairs of gears are used, that is double reduction final drive characteristics Two-stage transmission； Higher ground clearance with larger ratio； It can replace different gears to achieve different transmission ratios, increasing commonality of parts。 Axle ratio ：i0=z2 /z1× z4 /z3