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。
一、论文目录
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···········································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·····················································34 §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
二、论文截图
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