KD3010型自卸汽车变速器设计目录.doc

KD3010型自卸汽车变速器设计摘 要本文详细介绍了本次设计的主要内容、设计方法、设计理念、设计思路及设计心得等与设计有关的方方面面 ，首先，结合所设计的车型及当今国内外各车型变速器的发展现状、发展趋势选定本次设计采用的方案中间轴式变速器，中间轴式变速器设计先进，结构独特，两轴轴线在同一条直线上，经同步器将它们连接后即可得到直接挡。其动力从第一轴输入，然后流至中间轴，最后于第二轴输出。本次设计车型为轻型自卸汽车，则中间轴式变速器比较适合，且行驶利用率较高的五挡为传动效率（可达90%以上）较高的直接挡，噪声低、齿轮和轴承的磨损减少，因而大大提高了变速器的寿命。接着进行了变速器档数、各档传动比及齿轮几何参数的确定。然后又布置草图和变速器总装配图、轴的尺寸确定、换档机构的布置等。对中间轴、主轴进行了强度及刚度的校核计算。而后又对一挡及倒挡齿轮进行了弯曲应力和接触应力的计算，本次设计在设计方法上充分运用了计算机技术、机械类设计手册、设计软件。设计思想上秉着好造、好用的原则，尽力使各零件标准化、系列化、通用化！从而满足变速器产品的系列化设计。 关键词：3010型自卸汽车，变速器，中间轴，强度计算 KD3010 TYPE DUMP TRUCK GEARBOX DESIGN ABSTRACTThis paper describes the design of the current content,design methods, design concept, design ideas and design experience-such as design-related aspects. First, the integration of design models and models of the current domestic and international transmission of the current state of development Trend selected the designing of the program - Middle coaxial transmission! Middle coaxial transmission advanced design, unique structure, the two axis with a straight line, by synchronizing them can be connected directly block. Dynamic input shaft from the first, and then flow to the intermediate shaft, the final output in the second axis. The design of the vehicle after the moving higher utilization Trouble for transmission efficiency (up to 90%) higher direct block low noise.gear and bearing wear reduction,thereby greatly increasing the transmission of life.Then a few Transmission stall, stall transmission gear ratio and the geometric parameters determined. Then Layout Plan and the total transmission assembly,the axis to determine the size, shifting the layout.On the intermediate shaft, the axis of strength and stiffness of checking calculation. And then right one block and reverse gear for the bending stress and contact stress calculation! The design methods in the design of the full use of computer technology, mechanical design manual design software.The design ideologically animated create good, useful principle and try to make the parts standardization, serialization, and generalized! Then to meet the Series Design of Transmission products. KEY WORDS： kd3010 type dump truck gearbox design，transmission，intermediate shaftstrength符号说明A 中心距D 直径E 弹性模量 动比 发动机最大输出扭矩 机械效率 齿轮齿数 节点处法向压力角 螺旋角 弯曲应力 接触应力 圆周力 径向力 轴向力I 惯性矩f 挠度 转角M 弯矩m 模数 目 录 第一章 变速器概述及方案的确定 1 1.1变速器功用要求1 1.2变速器方案确定 1 1.2.1传动机构布置方案分析比较1 1.2.2倒挡传动方案6 1.3变速器零件结构方案 7第二章 各档传动比与齿轮几何参数的确定11 2.1 变速器各档参数选择11 2.2 传动比及齿轮数确定14 2.3齿轮变位系数的选择16第三章 轴的选择与齿轮强度验算18 3