文档介绍：沈阳工学院 I 摘要本设计是对载货汽车设计一个结构合理、工作性可靠的双级主减速器。此双级主减速器是由两级齿轮减速组成。与单级主减速器相比,在保证离地间隙相同时可得到很大的传动比,并且还拥有结构紧凑,噪声小,使用寿命长等优点。本文论述了双级主减速器各个零件参数的设计和校核过程。设计主要包括:主减速器结构的选择、主、从动锥齿轮的设计、轴承的校核。主减速器是汽车传动系中减小转速、增大扭矩的主要部件,它是依靠齿数少的锥齿轮带动齿数多的锥齿轮。对发动机纵置的汽车,其主减速器还利用锥齿轮传动以改变动力方向。关键词: 载货汽车;双级主减速器;齿轮;校核;设计沈阳工学院 II A BSTRACT This design is designs a structure to the truck tobe reasonable, work related reliable two-stage main gear box. This two-stage main gear box posed of two level of gear reductions. Compares with the single stage main gear box, when the guarantee ground clearance is the same may obtain the very great velocity ratio, and also has the structure to pact, the noise is small, service life long and soon merits. This article elaborated the two-stage main gear box ponents putation and the selection process, and putation examination. The design mainly includes: Main gear box structure choice, host, driven bevel gear's design, bearing's examination. The main reducer in the transmission lines used to reduce vehicle speed, increased the torque , it is less dependent on the bevel of more gear drive of less bevel gear . Purchase of the longitudinal engine automobiles, the main bevel gear reducer also used to change the driving force for the direction of transmission. Key words : Truck ; T wo-stage Main Reduction Gear ; Gear ; Check 沈阳工学院目录摘要..................................................................................................................................... I Abstract ............................................................................................................................ II 第1章绪论.................................................................................................................. 1 概述...................................................................................................................... 1 主减速器的概述...................................................................................... 1 主减速器设计的要求..........................