驱动桥传动系统设计方法及算法实现

发布时间：2018-01-20 18:40

本文关键词： 传动系统参数设计载荷分配程序实现 Romax Designer　出处：《重庆理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：驱动桥是汽车传动系的重要组成部分,需要承受来自车身及路面的复杂作用力与冲击载荷,对汽车的整体性能好坏起到至关重要的作用。随着现代汽车个性化发展的需要,对驱动桥传动系统的设计要求越来越高。由于缺乏设计方法的指导,国内一些企业新品开发多以国外类似的驱动桥产品为参照,采用类比设计的方法,通过修改一些主要尺寸进行逆向开发。产品设计没有方便的计算工具,诸如查阅图表、计算校核这些较为繁琐的常规工作大多数需要设计者一步步手动完成,这样不仅容易出错同时也极为耗费时间。本文根据驱动桥的结构特点,总结出驱动桥传动系统的设计方法并制定了各部件的设计流程,给出传动零件参数设计与校核方法,并将其编写为计算机程序,为驱动桥传动系统的设计提供便捷的工具,缩短新产品的开发周期。本文完成的主要研究工作有:1.总结出驱动桥传动系统各部件的设计顺序,介绍说明各传动部件不同结构型式的适用范围,绘制出各传动部件详细设计的设计流程图,为设计人员设计驱动桥传动系统提供了指导。2.叙述了传动系各部件基本参数的初选方法,给出了计算传动齿轮详细几何参数的计算方法。按照动力流的顺序研究了汽车动力在直行及转向两种工况下的载荷分配方法,得到了传动系统各零件所受负载大小的计算方法,参照统一标准对各传动系锥齿轮及直齿轮强度的应力计算与评价方法进行了说明,实现了汽车两种工况下驱动桥传动齿轮的准确校核。3.利用Plot Digitizer及MATLAB软件,将需要手动读数的图形曲线拟合出与零件几何参数相关联的曲线函数,采用C++语言将拟合得到的函数以及传动零件尺寸计算与校核公式编辑为计算机程序。使传动系零部件几何参数设计与校核的计算过程通过程序实现,并可实现离散数据或设计说明的便捷查阅。4.给出传动齿轮基本参数后,利用所编写的计算机程序完成了一款汽车驱动桥传动齿轮的详细参数设计,并对两种工况下的齿轮应力进行了计算。使用Romax Designer软件对设计模型进行了直行及转向两种工况的载荷分析,分析结果与通过程序计算的结果相对比,误差在允许范围内。最终表明,根据本文设计方法及程序可实现对驱动桥传动零件的快速详细设计,并能得到可靠的校核结果。
[Abstract]:The drive axle is an important part of the automobile transmission system, which needs to bear the complex force and impact load from the body and the road surface. It plays an important role in the whole performance of automobile. With the development of modern automobile, the design requirement of drive axle transmission system is more and more high. Because of the lack of guidance of design method. Some domestic enterprises take the similar drive axle products as reference, adopt the method of analogical design, and reverse develop by modifying some main dimensions. There is no convenient calculation tool for product design. Most of the tedious routine tasks such as checking charts and calculating and checking require designers to do it manually step by step, which is not only easy to make mistakes but also extremely time-consuming. This paper is based on the structural characteristics of the drive axle. The design method of drive axle transmission system is summarized and the design flow of each part is worked out. The parameter design and checking method of transmission part is given, and it is written as a computer program. It provides convenient tools for the design of drive axle transmission system and shortens the development cycle of new products. The main research work accomplished in this paper is: 1.The design sequence of drive axle transmission system components is summarized. This paper introduces the scope of application of different structural types of transmission components, and draws out the design flow chart of the detailed design of each transmission component. This paper provides guidance for designers to design drive axle transmission system. 2. The primary selection method of basic parameters of each part of transmission system is described. The calculation method of the detailed geometric parameters of the transmission gear is given. The load distribution method of the automobile power under both direct and steering conditions is studied according to the order of the power flow. The calculation method of the load on each part of the transmission system is obtained, and the stress calculation and evaluation method of the bevel gear and the spur gear of the transmission system are explained according to the unified standard. The accurate checking of drive axle transmission gear is realized under two working conditions. 3. Plot Digitizer and MATLAB software are used. The curve functions associated with the geometric parameters of the parts are fitted by the graphical curves which require manual reading. The function of fitting and the formula of dimension calculation and checking of transmission parts are edited into computer program by C language, and the calculation process of geometric parameter design and checking of transmission system parts is realized by program. And the discrete data or design instructions can be easily consulted. 4. After giving the basic parameters of the transmission gear, a detailed parameter design of the drive gear of the automobile drive axle is completed by using the computer program. The gear stress under two working conditions is calculated, and the load analysis of the design model is carried out by using Romax Designer software under both direct and steering conditions. Compared with the results calculated by the program, the error is within the allowable range. Finally, it shows that according to the design method and program of this paper, the fast and detailed design of drive axle transmission parts can be realized. A reliable check result can be obtained.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.218

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