摘  要
在现代汽车驱动桥上，主减速器的功用是将输入的转距增大并相应降低转速，以及当发动机纵置时还具有改变转矩旋转方向的作用。单级主减速器通常由主动齿轮和从动齿轮组成。在双级主减速器中，通常还要加一对圆柱齿轮或一组行星齿轮。在轮边减速器中则常采用普通平行轴式布置的斜齿圆柱齿轮传动或行星齿轮传动。主减速器采用的最广泛的是螺旋锥齿轮和双曲面齿轮。在某些公共汽车和重型汽车上有时也选用蜗轮传动。
本文中，首先要确定主减速器齿轮型式为双曲面面齿轮和发动机最大转矩，主减速器减速比，变速器一档传动比。然后，进行驱动桥各个部分主要参数进行计算。最后对主、从动锥齿轮，差速器圆锥齿轮，半轴齿轮，全浮式半轴，驱动桥壳强度进行校核。
关键词:   主减速器； 双曲面锥齿轮；差速器；半轴
Abstract
Nowadays, the main reducer, which on modern car driving axle, is used to increase the imported torque and correspond to decrease its speed, at the mean while, it also can chang
e the direction of torque when engine is longitudinal. Single-stage reducer is usually composed of the main driving gear and driven gear. In main two-stage reducer, a spur gear or a group of planetary gear also included. In the wheel-side reducer, helical gears drive or planetary gear is adopted, which is laid of common parallel coaxial. spiral bevel gear gear and hypoid gears are broadly adopted by main reducer. Worm transmission is used by some buses and trucks.
汽车差速器In the paper,ensure that the gear style of the main reducer is hypoid gear and the maximum engine torque firstly .Then calculate the main parameters of every components of the drive axle.Finally,check the strength of the main， driven bevel gear, cone planetary differential gear, axle gear and the whole floating half-axle .
Key word: Main reducer; Hypoid gears; Cone planetary differential gear;Half-axle
参考文献    48