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橡胶履带牵引车辆改进设计(高速行走机构)(有cad图).rar

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    橡胶履带牵引车辆改进设计(高速行走机构)摘要近年来,我国经济得到了飞速的发展,农业现代化也得到了进一步的提高。进入 21世纪后,国家更加注意到了农业重要性,采取了一系列优惠政策扶植农业机械的发展。我国是一个农业大国,拖拉机的制造和使用在数量上一直处于世界的前列,但其技术含量和发达国家相比差距较大,改变落后的机械水平,要提高工作效率和使用性能,进一步提高动力性和经济性对我们国家来说具有重要的意义,对可持续发展战略具有深远的影响。履带拖拉机行走系由履带行走装置和悬架组成,履带行走装置包括履带、驱动轮、支重轮、托轮、张紧轮和张紧缓冲装置;悬架包括连接拖拉机机架和支重轮的全部构架。履带行走装置的设计要求主要是保证拖拉机附着性能,降低接地压力,减少滚动阻力,提高零部件寿命。悬架的设计要求是保证拖拉机的行驶平顺性和稳定性。关键字:履带 驱动轮 支重轮 托轮 张紧轮和张紧缓冲装置2RUBBER TRACK TRACTOR DESIGN (HIGH SPEED WALKING) ABSTRACT In recent years, China has made rapid economic development, agricultural modernization has been further improved .After entering the 21st century, countries more noted the importance of agriculture, adopted a series of preferential policies to support the development of agricultural machinery.China is a large agricultural country, a tractor manufacturing and use of the quantity has been in the forefront of the world. However, its technical content and the wide gap between the developed countries in terms of changing the backward machinery, To improve efficiency and performance and further improve the power and economy of our country is of great significance, on the strategy of sustainable development has far-reaching impact.Crawler tractor from the Department of crawler devices and suspension components, including the installation of crawler tracks, driving wheel, supporting wheels, Roller, Tension round and tension device; Suspension includes the connection tractor rack and support all the wheels framework.Crawler device design requirements is to ensure that the main tractor attachment performance, lower ground pressure, reduced rolling resistance, Parts raise life expectancy. Suspension design requirements is to ensure that the tractor ride comfort and stability. Keywords : Tracked driving wheel supporting wheels Roller Tension round and tension device 3符号说明拖拉机使用重量 TSG地面附着系数 一般取 =1.0 支重轮滚动表面直径 ㎜zD拖链轮轮缘直径 ㎜T弹性模量 N/㎜E 2驱动轮节圆直径 ㎜q驱动轮齿顶圆直径 ㎜e驱动轮齿根圆直径 ㎜iD履带节距 ㎜t履带销套外径 ㎜td驱动轮工作齿数Z驱动轮轮齿数重力加速度 =9.8 m/sg g2每侧支重轮个数ti履带前倾角1履带后倾角24目录第一章 前言························································5第二章 履带行走系的总体设计····································7§2.1履带行走系的总体设计········································7§2.2 履带行走系类型的选择·······································7§2.3 整体台车行走系总体设计·····································8§2.4平衡台车行走系总体设计·····································9§2.5其它台车行走系总体设计····································10§2.6动力性能估计···············································11第三章 悬架的设计···············································12§3.1履带车辆的悬架机5构·····································12§3.2 整体台车行走系悬架结构·······························12§3.2.1半钢性悬架机构·····································12§3.2.2 刚性悬架和弹性悬架结构·······························13§3.3平衡台车行走系悬架机构·····································13§3.3.1悬架结构················································13§3.3.2 悬架性能参数的选择···································14第四章 履带行走系结构与选择···································15§4.1驱动轮的位置···········································15§4.2引导轮的位置···········································15§4.2 引导轮的位置···············································15§4.4托链轮的个数和位6置········································16§4.5方案设计···················································16第五章 履带行走装置·············································18§5.1 履带技术要求···············································18§5.2 履带类型···················································18§5.3 履带尺寸确定···············································19§5.4 履带的校核·················································22§5.5 履带的尺寸确定和校核······································23第六章 驱动轮···················································26§6.1驱动轮齿形设计·············································26§6.2驱动轮的结构设计··································7·········26§6.3凹齿齿形的设计计算·········································27§6.4驱动轮轴各项尺寸的确定·····································28§6.5 驱动轮强度校核·············································29第七章 支重轮···················································30§7.1结构设计···················································30§7.2各项尺寸的确定·············································31§7.3支重轮各个构件的选择·······································32§7.4支重轮强度验算·············································32第八章 张紧轮及张紧装置······································34§8.1 张紧轮·····················································348§8.2 张紧度调整机构············································35§8.3 缓冲弹簧···················································36§8.4 零件强度计算···············································37第九章 托链轮···················································38第十章 结论······················································39致谢······························································40参考文献··························································41第一章 前言9在拖拉机制造的多年发展历史中,行走系的技术进步和水平一直处于举足轻重的地位。拖拉机性能的好坏,不仅取决于发动机,而且很大程度上依赖于行走系的有效功率等性能。为有效的拖拉机的动力性和燃油经济性,以前那种粗糙的制造工艺和落后的生产技术已经不能满足时代的发展要求,本设计就是根据拖拉机行走系本身存在的问题,进行的一次改进设计。随着农业机械化的展开,各种大型农用机械车辆的使用越来越广泛。本设计东方红 1302R履带拖拉机为为原形,以其的基本参数为依据,查阅相关资料,完成履带履带拖拉机行走系的相关设计,履带拖拉机车适用于在大型农场和工作量较大的农村作业,主要应用在深耕,旋耕,收获谷物,播种等农业生产场合。为此在动力性、通过性、工作稳定速度,可靠性,耐用,等方面对设计者提出了更高的要求!我国是一个农业大国,拖拉机的制造和使用在数量上一直处于世界的前列,但其技术含量和发达国家相比差距较大,改变落后的机械水平,要提高工作效率和使用性能,进一步提高动力性和经济性对我们国家来说具有重要的意义,对可持续发展战略具有深远的影响。但是本次设计只是在原有的基初上进行的改进,虽然行走系的各项性能有所提高,但是仍然同性能优良的国外行走系有很大差距。随着我国机械工业水平的发展,使行走系在各方面都能赶上世界的步伐。为了满足这次履带行走系的设计要求,本人充分利用现代通讯工具、机械设计软件、导师资源等一切便利条件,收集资料,细心计算、积极与其他相关系统或总成的设计者沟通与交流。力求最后设计的产品能够达到:好造、好用、好看的目标。另外,由于这是本人第一次做如此全面的行走系的设计,也是第一次接触到如此复杂的设计。由于缺乏应验,难免没有一些错误、不足在所难免,恳请各位同行不吝赐教!批评指正。从而通过此次设计来提高本人的设计水平。第二章 履带行走系的总体设计§2.1履带行走系的总体设计要求10履带拖拉机行走系由履带行走装置和悬架组成。履带行走装置包括履带、驱动轮、支重轮、托轮、张紧轮及张紧缓冲装置;悬架包括连接拖拉机机架和支重轮的全部构件。履带行走装置的设计要求主要是保证拖拉机附着性能,降低接地压力,减少滚动阻力,提高零部件的寿命。悬架的设计要求主要是保证拖拉机的行驶平顺性和稳定性。具有橡胶履带行走装置的拖拉机其主要性能特点是:1、行走装置接地面积大,对地面压力约轮式拖拉机的一半,具有良好的平地通过性和越障通过性,对松软、潮湿土壤上工作适应性较好。2、具有良好的牵引性能,适合繁重工作。侧向系统稳定性和转向操作性较好,对坡地作业有较好适应性。3、受履带转向方式和保持接地压力较均匀的限制,使履带拖拉机带悬挂机具工作的适应性比轮式拖拉机较差。4、金属履带行走装置适应于硬路面上运输和转移,综合利用程度较低。5、制造成本和行走装置维修费用较高。明白了履带拖拉机的优缺点,使我们在研究中扬长避短,结合我国的农业情况,本课题具有长远的发展意义,为我国农业机械化增加一分力量。§2.2 履带行走系类型的选择目前,履带拖拉机行走系统可按台车架的不同型式(即支重轮之间彼此不同的连接方式)分为两大类:即整体台车行走系和非整体车行走系。整体台车行走系即每侧的支重轮、托轮、张紧轮及张紧缓冲装置都安装在一个整体台架上。每侧的各支重轮轴心线的相对位置固定不变,各支重轮之间距离较小,因而在平坦松软的地面上的接地压力比较均匀,附着性能较好,适用于牵引和推土作业。整体台车架结构坚固,便于安装各种作业机具,是美国、日本、西欧等国工业用或农业用履带拖拉机行走系的主要型式。中国、前苏联和东欧等国主要在工业用履带拖拉机及从事开荒和粘重土壤作业的大型农业用履带拖拉机上采用,这种行走系由于长度方向尺寸较短、重心低,所以稳定性好,也可用于小型履带拖拉机。非整体车(平衡台车和独立台车)行走系即每侧的支重轮安装在两个或两个
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