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ZL50轮式装载机行星式动力换挡变速箱设计含8张CAD图+说明书

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装配图

摘要
ZL50型装载机所使用的是行星式动力换挡变速箱。1.对行星式动力换挡变速箱进行分析，计算变速箱的总体参数；2.确定出变速箱各档传动比；3.对行星式变速箱齿轮进行布置设计，并画出变速箱总体布置图；4.针对行星式变速箱的结构设计，这是这次设计中最为重要的地方，通过计算出传动比，设计出变速箱的传动简图，然后进行配齿的计算，可以计算出齿圈、行星轮和太阳轮的齿数，并校核这些零部件的合理性。最后进行齿轮设计；5.对变速箱中轴承、轴、离合器的选择和设计。行星式有着比较显着的特点：运用到船底动力时可以实现功率分流：输入轴和输出轴具有同轴性采用合理的内啮合等，这都使变速箱体积减校它可以作速度的增、减和变化运动，以及运动的合成和分解。这些功能对现代机械传动有着较为重要的意义。设计时对ZL50型装载机匹配了双涡轮液力变矩器。因为它的高效范围较宽，所以可以使设计的变速箱档位数减少，并简化变速箱结构。
关键词：轮式装载机、行星式变速箱
Abstract
The type ZL50 loader uses a planetary power shift gearbox. 1. of the planetary power shift gearboxwas analyzed, the overall parameter calculation of the gearbox; 2. to determine overall gear ratiowas 3.; the layout design of planetary gear box, and draw the general layout of the gearbox; 4. for planetary gear box structure design, this is the most important in this design, by calculating the transmission ratio, transmission gearbox design diagram, calculation and tooth matching, can calculate the number of teeth gear, planetary gear and sun gear, and check the rationality of these parts. Finally, the gear design; 5. pairs of transmission bearings, shaft, clutch selection and design. Planetary has a more prominent feature: the use of power to the bottom of the ship can achieve power diversion: the input shaft and output shaft are coaxial, using a reasonable internal meshing,which all reduce thevolume of the gearbox. It can act as a speed increase, subtraction, and change movement, aswell as the synthesis and decomposition of motion. These functions are of great importance to modern mechanical transmission. When designing, the ZL50 loader is matchedwith a dual turbine torque converter. Because of itswide range of efficiency, the design can reduce the number of transmission gear boxes and simplify the transmission structure.

Keywords:wheel loader; planetary gearbox

目录
1绪论1
1.1动力换挡行星变速箱1
1.2设计程序和公用归纳2
2传动机构设计3
2.1传动比的确定3
2.2传动简图的设计7
2.3简图设计的原则7
2.4传动简图的选择8
2.5传动路线8
3行星机构设计9
3.1配齿计算9
3.2选配齿轮10
3.3齿宽选取11
3.4可由上述的D和m的值计算出齿圈齿数12
3.5同心条件校核12
3.6计算各档行星构件的转速13
4轮的强度校核14
4.1太阳轮的转矩14
4.2受力分析15
4.3校核齿轮的弯曲疲劳强度15
4.4校核齿面接触疲劳强度16
5离合器设计16
5.1确定换档离合器的结构型式16
5.2确定主要参数16
5.3片式离合器的摩擦力矩的计算19
5.4离合器滑磨功验算19
5.5片式离合器油缸计算20
6齿轮设计20
6.1计算载荷的确定20
6.2齿轮的变位和修正21
6.3行星排各齿轮的几何尺寸22
6.4齿轮的强度验算22
6.4.1验算太阳轮与行星轮传动的强度22
6.4.2接触疲劳强度计算23
6.4.3验算行星轮与内齿圈传动的强度24
6.4.4接触疲劳强度计算25
6.5齿轮的材料，加工精度和形状26
7轴的设计26
7.1选择材料26
7.2初选轴径27
7.3轴的强度验算27
7.4轴的刚度验算29
8轴承的选择计算31
8.1轴承的选择原则31
8.2轴承的强度校核及寿命计算31
致谢34
参考文献35