A总装图
多功能小型拖拉机变速器设计
摘要
拖拉机变速箱要求有足够的排挡数，各档的传动比应与要求的传动速度相适应，使拖拉机有较高的生产率和经济性。要有空档便于停车；换挡方便，并能防止同时挂档两档，防止自行挂档和自行脱档；而且结构越简单越好。
本文阐述了拖拉机变速箱的齿轮、轴等零件的设计与校核。本设计利用4×2的换挡方式实现速度的改变。针对平面出图问题，我利用Solid Edge建模在投影的设计思想，直接形象的看到变速箱的模型。把计算出的所需参数，如齿轮中心距、齿轮齿宽、轴长度和直径等数据就可以画出零件的基本造型。再将所有零件立体图进行装配就可以得到变速箱的立体图形，将其进行平面视图投影，就可以得到装配图的基本造型。
该拖拉机的行驶参数如下：最低速度为2.12km/h的爬行档或最高速度为28.12km/h的高速运输档（8+2），供选装。爬行档装置，速度0.41-1.36km/h。这里爬行档为2档，爬行机构设置在副变速箱中，并用离合器改变爬行与正常行驶的切换。倒档是通过惰性齿轮改变轴的转动方向实现的。
关键词：拖拉机；变速箱；设计
Abstract
Tractor transmission requires a number of stalls enough, transmission gear ratio should be matched with the transmission speed requirements, the tractor has higher productivity and economy. To take convenient parking; shift easily, and can prevent the gear two gear, prevent to gear and to slip; and the more simple structure and better.
This paper describes the design and checking of tractor transmission gear, shaft and other parts of the. This design using 4 × 2 shift mode to realize the speed change. The plane drawing problems, we propose Solid Edge modeling using the design thought of projection, and see transmission model is the direct image. The required parameters are calculated, such as gear center distance, tooth width of gear, shaft length and diameter data can draw the basic shape of parts. Then all parts stereogram assembly can get three-dimensional graphics gearbox, the plane view, you can get the basic shape of the assembly drawing.
The running parameters of the tractor: minimum speed for high-speed transport document crawling file 2.12km/h or a top speed of 28.12km/h (8+2), for the optional. Crawling gear device is speeding of 0.41-1.36km/h. Here the creeper gear 2 gear, crawling mechanism is arranged on the accessory gearbox, clutch switch and change the crawl and the normal running of. Reverse the direction of rotation is realized by inert gear change shaft
Keywords: Tractor Gearbox; Solid; design
目录
第一章绪论……………………………………………………………………………1
第二章拖拉机变速箱设计要求和步骤…………………………………………2
2.1对变速箱的要求………………………………………………………………………2
2.2变速箱的设计步骤……………………………………………………………………2
2.3变速箱的分类…………………………………………………………………………3
第三章齿轮的设计和计算校核……………………………………………………4
3.1齿轮传动的主要特点…………………………………………………………………4
3.2齿轮的设计准则………………………………………………………………………4
3.3齿轮的数据确定及其校核……………………………………………………………4
3.3.1齿轮的数据…………………………………………………………………………4
3.3.2齿面接触强度的校核………………………………………………………………5
3.3.3齿根弯曲强度的校核………………………………………………………………5
第四章轴的设计和计算校核………………………………………………………7
4.1轴的设计………………………………………………………………………………7
4.2轴的参数设定与校核…………………………………………………………………7
4.2.1轴TLJ01-01-1的参数………………………………………………………………7
4.2.2轴TLJ01-01-1上的载荷分析………………………………………………………8
4.2.3按弯曲合成应力校核轴的强度……………………………………………………8
4.2.4精确校核轴的疲劳强度……………………………………………………………8
第五章滚动轴承、花键计算校核…………………………………………………11
5.1滚动轴承的校合………………………………………………………………………11
5.1.1求两轴承的径向载荷Fr1和Fr……………………………………………………11
5.1.2两轴承的计算轴向力Fa1和Fa2……………………………………………………11
5.1.3轴承当量载荷P1和P2………………………………………………………………11
5.1.4验算轴承寿命………………………………………………………………………12
5.2花键联接的类型、特点和应用………………………………………………………12
5.3具体参数用……………………………………………………………………………12
5.4花键的校核……………………………………………………………………………13
结束语……………………………………………………………………………………14
致谢………………………………………………………………………………………15
参考文献…………………………………………………………………………………16
设计目录
摘要部分
字数统计
爬行机构
设计所包含文件
轴1
轴2
轴3
齿环1
齿环2
齿轮1
齿轮2
齿轮5
齿轮9
齿轮12
齿轮13
惰性齿轮
啮合套1
箱座
齿轮4
齿轮6
齿轮7
齿轮8
齿轮10
齿轮11
啮合套2
