中型货车驱动桥总成毕业设计说明书.doc

2012届毕业设计说明书 PAGE PAGE II 中型货车驱动桥总成毕业设计说明书 ABSTRACT The design is a reference to the traditional axle design. Access to a lot of information in the design process. This design is the first demonstration program. Followed by the structure of the drive axle design. Including the choice of the number of gear pairs, the choice of gear type differential design, the choice of the differential gear, axle housing structure. Which force the check: the main driven gear check, check, bearing axle spline and gear shaft spline checking, axle check under different working environments. In the design process in accordance with the conditions of use of design reference models, purpose, and select the appropriate structure. Taking into account the practicality, economy, stability of the drive axle. 3D modeling software for UG7.5, and catiaV5 2D drawings drawn mainly use catiaV5. Use of UG7.5 assembly simulation exercise. And detect the spatial relationships of various parts in the 3D modeling process. Appropriate changes to the parameters of the primary. The design seeks to meet the case, the axle structure is simplified. Try to reduce costs and improve the stability of the drive axle. However, due to the limitations of their own level, there are many inadequacies. I hope you correct! Key words: medium-sized trucks the rear axle differential axle housing 目录 TOC \o 1-3 \h \z \u 第一章 主减速器的设计 1 1.1主减速器的结构形式 1 1.2主减速器减速型式的选择 1 1.3主减速器齿轮型式的选择 1 1.3.1螺旋锥齿轮与双曲面齿轮比较 2 1.3.2双曲面齿轮传动比螺旋锥齿轮传动还具有如下优点 2 1.4主减速器主动齿轮的支承型式选择 3 1.4.1主减速器主动齿轮的支承型式 3 1.5主减速器从动齿轮支承的选择 4 1.6主减速器齿轮计算荷载的确定 5 1.7主减速器齿轮基本参数的选择 7 1.7.1齿数的选择 7 1.7.2节圆直径的选择 8 1.7.3齿轮端面模数的选择 8 1.7.4齿面宽的选择 9 1.7.5双曲面齿轮的偏移距E与偏移方向的选择 9 1.7.6双曲面齿轮螺旋方向的选择 10 1.7.7螺旋角的选择 11 1.7.8齿轮法向压力角的选择 13 1.8双曲面齿轮的强度计算 15 1.8.1单位齿长上的圆周力 15 1.8.2齿轮的弯曲强度计算 16 1.8.3齿轮的接触强度计算 18 1.9主减速器齿轮的材料及热处理 19 1.10主减速器轴承的计算 20 第二章 差速器 26 2.1差速器的结构与选择 26 2.2差速器齿轮基本参数选择 27 2.2.1行星齿轮数目的选择 2