Chapter 18 Driving Axle 月儕大学 TONGII UNIVERSTTY Classification of the final drive By final drive stall By number of driving gear pair >Single speed type Constant ratio >single reduction final >Double speed type drive >Double reduction >Two shifts final drive wheel reducer By structural form of gear pair Spur gear type >Axis of driving and driven gears are parallel Bevel gear type >Axis of driving and driven gears are vertical and intersectant >Hypoid gear type >Axis of driving and driven gears are vertical but not intersectant,and have offsetChapter 18 Driving Axle By number of driving gear pair single reduction final drive Double reduction final drive  wheel reducer Classification of the final drive By final drive stall Single speed type Double speed type By structural form of gear pair  Spur gear type  Bevel gear type  Hypoid gear type Constant ratio Two shifts Axis of driving and driven gears are parallel Axis of driving and driven gears are vertical and intersectant Axis of driving and driven gears are vertical but not intersectant，and have offset