汽车主减速器结构设计含NX三维图

三维总装图

摘要

主减速器是汽车总成中重要传动结构之一，位于汽车传动系的末端，其基本功用首先是增扭、降速，改变转矩的传递方向，即增大由传动轴或直接从变速器传来的转矩，并将转矩合理的分配给左、右驱动车轮；所以主减速器结构形式和设计参数直接影响汽车的动力性、燃油经济性、可靠性和汽车的使用寿命。
本次课题设计是参考传统的主减速器的设计方法进行轻型货车的主减速器设计。首先通过已知的汽车相关参数，确定驱动桥整体方案，包括驱动总成结构形式为整体式驱动桥，选择主减速器结构形式为单级主减速器，主减速器传动形式选择双曲面锥齿轮传动，主减速器主动锥齿轮选择悬臂式支承，从动锥齿轮跨置式支承，接下来是对主减速器壳等不需要计算的零件设计，但必须要满足汽车的使用要求。最后利用三维建模软件绘制零件三维图并进行装配。

关键词：主减速器；双曲面锥齿轮；建模

Abstract
The main reducer, one of the most important transmission structures in the automobile assembly, is located at the end of the automobile transmission system. The basic function is to increase the torque and reduce the transmission direction of the torque, that is to increase the torque transmitted from the transmission shaft or directly from the transmission, and to allocate the torque to the left and rightwheels, so the main reducer is connected. The configuration and design parameters directly affect the power performance, fuel economy, reliability and service life ofvehicle.
The design of this project is to design the main reducer of light truck by referring to the design method of the traditional main reducer. First of all, through the known automobile related parameters, the overall scheme of the drive bridge is determined, including the drive assembly structure as the integral drive bridge, and the main reducer is selected as the single stage main reducer. The main reducer drives the double curved bevel gear transmission, the main reducer chooses the cantilever support and the driven cone. The gears are cross supported, then the parts such as main reducer shell and so on do not need to be calculated, but they must meet the requirements ofvehicle use. Finally, 3D modeling software is used to draw 3D parts and assemble them.

Keywords: main reducer, hyperboloid bevel gear, modeling
目录
摘要I
Abstract II
1绪论1
1.1课题的设计任务1
1.2主减速器的国内外发展概况1
1.3课题的技术路线2
2总体方案的设计3
2.1主减速器结构形式的选择3
2.2主减速器支承形式的选择3
2.2.1主动锥齿轮的支承形式3
2.2.2从动锥齿轮支承4
2.3传动形式的选择4
3主减速器齿轮副设计7
3.1传动系载荷的计算7
3.2主减速器齿轮的设计计算8
3.2.1主从动锥齿轮齿数的选择8
3.2.2从动锥齿轮节圆直径及端面模数的计算8
3.2.3主从动锥齿轮的齿面宽度计算9
3.2.4齿轮的偏移计算9
3.2.5螺旋角的选择9
3.2.6法向压力角的选择9
3.2.7双曲面齿轮几何尺寸计算结果9
3.3齿轮的强度计算及校核18
3.3.1单位齿长圆周力的计算18
3.3.2轮齿弯曲强度校核19
3.3.3轮齿接触强度校核21
3.3.4锥齿轮材料及热处理22
3.4主减速器齿轮的三维建模23
4减速器轴承的选择25
4.1轴承支承受力分析25
4.2轴承选择28
4.2.1轴承类型选择28
4.2.2轴承型号选择29
4.2.3轴承寿命校核31
4.3轴承的设计结果31
5主减速器预紧装置设计32
5.1.1轴承的预紧32
5.1.2锥齿轮的调整33
结论35
致谢36
参考文献37

设计所包含文件

摘要

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