摘要：本设计为ZL50装载机行星式动力换挡变速箱，此变速箱具有结构紧凑、载荷容量大、传动效率高、齿间负荷小、结构刚度好、输入输出轴同心以及便于实现动力与自动换挡等优点，同时也有结构复杂、零件多、制造精度高、文修困难等缺点。随着制造加工精度的提高，这种变速箱不仅在工程车辆上得到了广泛应用，在汽车上的应用也日益广泛。3669
   首先通过发动机与液力变矩器的匹配设计计算，使发动机功率得到充分利用，进而改善装载机牵引性能，然后选择装载机的传动方案，变速箱有前进两个档位，后退一个档位，通过操纵两个换挡离合器即可实现换挡。离合器类型为双离合器，换挡迅速平稳。
   最后进行了变速箱主要参数的确定和配齿计算，通过主要零部件的强度计算以及轴承寿命验算，变速箱满足了设计要求。

关键词：轮式装载机，行星式变速器，动力换挡
The design for the 5 ton loader power shift transmission
Abstract：The design for the ZL50 loader planetary power shift transmission, the gearbox has a compact, load capacity, transmission efficiency, the load between teeth small, the structure stiffness, input and output shaft concentric and easy to implement dynamic and automatic shift, etc., but also a complex, multi-part, high precision manufacturing, maintenance problems and other shortcomings. As the manufacturing process to improve the accuracy of such transmission-type vehicles not only in engineering has been widely used in automotive applications are increasingly widespread.
   First, by matching the engine and torque converter design and calculation, the engine power are fully utilized, Loader in order to improve traction performance, and then select the loader transmission scheme, transmission has two forward gears, back a gear, shifting through the manipulation of the two clutch shift can be realized. Clutch type dual clutch, shift quickly and smoothly.
   Finally, to determine the main parameters of the transmission and distribution gear calculation, calculated by the intensity of the main components and checking the bearing life, transmission to meet the design requirements.  

Keywords: wheel loaders, planetary transmission, power shift .
目录

绪论
1.ZL50装载机动力换档变速箱概述.1
1.1 轮式装载机产品应用简述1
1.2 产品的现状2
1.3产品的发展方向.3
1.4课题的目的与要求.3
1.5设计的技术要求与参数.3
2 ZL50装载机动力换档变速箱方案设计4
2.1方案的选择与确定4
2.1.1供选择的三种变速器方案.4
2.1.2 三种变速器各自的特点4
2.1.3 确定方案4
2.2行星齿轮装置的性能与特点5
2.3 各档位及传动原理.6
2.4 ZL50装载机变速箱传动路线8
3 设计计算11
3.1 各档位的传动比计算.11
3.1.1 行星变速机构的工作原理12
3.1.2 前进I档的传动比计算.13
3.1.3 倒档的传动比计算13
3.1.4 前进II档的传动比计算.13
3.2 行星轮的设计计算.13
3.2.1 计算齿圈齿数并验算传动比条件14
3.2.2 验算装配条件14
3.2.3 按减齿方法计算行星轮齿数14
3.2.4 中心距和啮合角的确定14
　3.2.5 邻接条件验算14
3.2.6 计算a－g啮合副的重合度15
3.2.7 齿根弯曲疲劳强度15
3.2.8 齿面接触疲劳强度15
3.3 中间输出齿轮与输出轴齿轮传动设计计算.16
3.4 轴的设计计算.19
3.4.1 中间输入轴的设计计算19
3.4.2 输出轴的设计计算24
3.5中间输入轴花键的设计及校核28
3.6变速器箱体的设计29
3.6.1 箱体的主要功用29
3.6.2 设计要求29
3.6.3 箱体结构设计. 29 5吨级装载机动力换挡变速箱设计+CAD图纸+答辩PPT:http://www.751com.cn/jixie/lunwen_70.html