农用车140机械变速器设计

机械设计制造及其自动化文档，文档编号:JX1296  文档字数:17001.页数:60

摘     要
 
 本文档是关于变速器的设计，车辆变速技术是改善、提高车辆总体性能的关键技术，是世界汽车工业100多年的发展历程中最具代表性的技术，同时也是其它技术在车辆技术上的体现。随着科学技术的迅猛发展，车辆变速技术也发生了日新月异的变化，大量的新技术、新成果不断地融入。本文在深入考察变速技术应用前景的基础上，根据同类车型在典型路段上实测的随机载荷，用统计分析法组成载荷谱，进行变速器的疲劳寿命计算。这种可靠性设计方法比较符合实际，如果再以优化设计方法选择有关设计参数及与发动机参数作最佳匹配，则可得到以最小零部件尺寸满足设计所要求的寿命和性能的设计方案。有时亦可辅以有限元分析。
关键词：三轴式 ；同步器 ；中心距  齿轮模数 ；轴的挠度 ；飞溅润滑 

Abstract
 The present paper is about transmission gearbox's design, the vehicles speed change technology is the improvement, enhances the vehicles overall performance the key technologies, is in the world automobile industry more than 100 year development processes the most representative technology, simultaneously is also other technologies in vehicles technology manifestation. Along with science's and technology's rapid development, the vehicles speed change technology has also had the change which changes with each new day, the massive new technologies, the new achievement integrate unceasingly. This article in thorough inspection speed change technology application prospect foundation, according to similar vehicle type in typical road section actual random loading, with the statistical analytic method composition loading spectrum, carries on transmission gearbox's fatigue life computation. This reliability design method comparison tallies with the reality, if again the optimization design method choice related design variable and makes the optimum matching with the engine conditions, then may obtain by the smallest spare part size satisfies the life which and the performance design proposal the design requests. Sometimes may also auxiliary by the finite element analysis.

Keywords：Three axle type; Synchromesh; Center distance; Gear modulus; Axis amount of deflection; Splash lubrication.
目  录
中文摘要 Ⅰ
英文摘要 Ⅱ
目录 Ⅲ
第一章     绪论 1
 1.1  研究动机与目的 1
 1.2  研究背景 1
 1.3  研究方法与系统描述 1
 1.4  文档內容概述 2
第二章     变速器基本参数的确定 3
 2.1   变速器的档位数和传动比 3
 2.2   中心距 4
 2.3  齿轮参数 7
 2.4   各档齿轮齿数的分配 14
第三章     变速器齿轮的设计计算 18
 3.1   变速器齿轮的几何尺寸计算 18
 3.2   变速器齿轮的强度计算与材料选择 24
第四章     变速器轴 39
第五章     同步器 44
 5.1   惯性同步器的结构类型 44
 5.2   惯性同步器的工作原理 46
 5.3   惯性锁止式同步器的主要结构参数 49
 5.4   转动惯量的计算 51
 5.5   同步器摩擦副的材料 53
第六章     总结 54
致谢 55
参考文献 

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