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549 橡胶履带拖拉机变速器改进设计（有cad图） 橡胶 履带 拖拉机 变速器 改进 设计 cad

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549 橡胶履带拖拉机变速器改进设计（有cad图）,549,橡胶履带拖拉机变速器改进设计（有cad图）,橡胶,履带,拖拉机,变速器,改进,设计,cad

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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体会等与设计有关的方方面面！首先，分析了当今国内外重型车变速器的发展现状、发展趋势及本次设计采用的方案-双中间轴式多档变速器！双中间轴设计先进，结构独特，动力从输入轴输入，然后分流至两个中间轴，最后汇集于主轴输出，然后分流至两个中间轴，最后汇集于主轴输出，实现了箱体内部的功率分流，从而使变速器内每个中间轴及每个齿轮上的载荷减半，大大改善了齿轮轴承和箱体的受力情况，与单中间轴变速器相比，双中间轴变速器受路况，载荷和运能等因素影响要小一些，更适合中国国情。在设计过程中尽力做到有理有据，确定方案之后对整车的动力性和燃油经济性进行了简化计算及评定。接着进行了变速器档数、主减速器传动比、各档传动比及齿轮几何参数的确定。接下来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。对主箱中间轴、主轴进行了强度及刚度的校核计算。而后对每对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、好看的原则，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。从国内重型汽车变速器市场容量来看，有三分之一的产品来自进口，而另外三分之二的产品中有80%以上源自国外技术，国内自主开发的重型汽车变速器产品销量很小，从而说明国内重型汽车变速器厂家的自主开发能力仍然很薄弱，应对整车新车型配套产品的能力远远不够。为此本次设计的变速器主要是针对重型车而设计，根据当前的市场供求情况本类型变速器有着广阔的市场前景！关键词： 双中间轴 ，强度计算，齿轮应力，变速器ABSTRACTThis paper describes the design of the current content, design methods, design concept, design ideas and design experience-such as design-related aspects. First, theanalysis of todays heavy-duty truck transmission of the current state of development trends and the current design of the program - the-middle Cylindrical Roller Bearings Transmission! Middle-axis advanced design, unique structure, dynamic input from the input shaft, and then diverted to the two intermediate shafts. Survey spindle in the final output, and then diverted to the two middle axis, in the final pool spindle output achieved a box within the power split, so that each intermediate transmission shaft and the gear each load half, greatly improved bearings and gear box by the edge of the intermediate shaft and single transmission than double by the middle axle transmission traffic. load and can be transported to the impact of factors such as smaller, more suitable for Chinas national conditions. In the process of designing the legislature should do its best, determining program on the vehicle after the power and fuel economy for a simplified calculation and assessment. Then a few stalls transmission, the transmission ratio main reducer, the stalls and gear transmission ratio of the geometric parameters determined. Next Layout Plan and the total transmission assembly, the axis to determine the size, shifting the layout. Box in the main intermediate shaft, spindle, and the Deputy boxes of the intermediate shaft strength and stiffness is calculated. Then right gear for each of 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. Ideologically animated design: create good