摘要
在整个世界汽车市场的需求和发展中,亚太地区将成为全球最大的汽车销售市场,其中以中国的汽车市场发展最为迅猛。2009年自度过全球金融海啸危机的寒冬后,欧美市场进入需求衰退期,中国汽车市场规模进入了迅猛高速发展期,产销量跃居世界第一。与此同时,中国卡车行业的年产销数量可谓世界前列,市场容量较大;中国卡车市场的高端需求正在崛起。据最新数据显示,2010年1-5月中国卡车行业生产整车近125万辆,同比增幅超过30%,尽管我国经济遭受金融危机的巨大冲击,但随着国家4万亿元扩大内需政策的实施及海外发展中国家市场的开拓,伴随着我国公路、铁路及其他基础建设项目的陆续开工,尤其是2009-2010年我国陆续出台的一系列促进汽车消费(如汽车下乡、以旧换新补贴政策)和汽车出口的相关政策,卡车行业已成为率先受益的行业。从卡车行业的发展趋势来看,2009年全国卡车市场需求总体加快,随着国家一系列宏观调控政策的逐步到位,2010年仍将呈现较好的发展态势。随着公路和铁路建设、现代物流业和节能减排工程以及民生工程的实施到位,必将为紧系国民经济建设的卡车产业带来新的发展机遇
关键词:转向桥;转向器;载荷;强度;
ABSTRACT
In the whole world car market demand and developing, in the asia-pacific region will become the world's largest auto sales market, in which China's auto market develop the most rapidly. Since 2009, spend the winter in global financial tsunami crisis after the European and American market into recession, China's automotive market demand into rapid high-speed development scale and the destinations in the world in terms of first. Meanwhile, Chinese trucks in manufacturing industry, is the world number is bigger; the forefront of market capacity China truck market demand is rising in the high-end. According to the latest figures show that 2010 1-5 months China truck industry production nearly 125 million vehicles, vehicle year-on-year rate of increase more than 30%, although our country economy suffers financial crisis, but along with the huge impact national four trillion yuan to expand domestic demand and the implementation of the policy of developing countries overseas market exploration, along with our country roads, railways and other infrastructure projects in succession, especially the start of 2009-2010 China has promulgated a series of promoting auto (such as car went to the country, to old change new subsidies) and automotive export policies that truck industry has become the industry first benefit. From the development trend of truck industries, 2009 national truck market demand, as countries overall speed up a series of macroeconomic regulation and control policy gradually in place, 2010 will still has a good momentum of development. Along with the highway and railway construction, modern logistics industry and energy conservation and emission reduction projects and minsheng project implementation in place, will the national economic construction for a tight trucks of industry with a new development opportunity
目 录
摘要………………………………………………………………………………………Ⅰ
Abstract…………………………………………………………………………………Ⅱ
第1章 绪 论……………………………………………………………………………1
1.1前桥的概述…………………………………………………………………………2
1.2循环球转向器的概述………………………………………………………………5
1.3 研究内容……………………………………………………………………………6
第2章 循环球式转向器的设计………………………………………………………5
2.1转向器结构形式选择………………………………………………………………7
2.2转向器结构设计……………………………………………………………………7
2.3车型的选取与技术参数分析………………………………………………………8
2.4转向系计算载荷的确定……………………………………………………………8
2.5各零件主要结构与参数确定………………………………………………………9
2.5.1螺杆、钢球、螺母传动副……………………………………………………9
2.5.2齿条、齿扇传动副……………………………………………………………11
2.5.3间隙调整装置的结构设计…………………………………………………13
2.6本章小结……………………………………………………………………………13
第3章 循环球式转向器零件强度计算……………………………………………14
3.1钢球与滚道间的接触应力………………………………………………………14
3.2螺杆在弯扭联合作用下的强度计算……………………………………………17
3.3本章小结…………………………………………………………………………18
第4章 转向桥设计……………………………………………………………………19
4.1结构参数选择……………………………………………………………………20
4.2转向桥结构形式…………………………………………………………………20
4.3选择前桥结构型式及参数………………………………………………………20
4.4前轮定位角.......................................................20
4.5本章小结.........................................................20
第5章 转向桥设计……………………………………………………………………21
5.1前轴强度计算……………………………………………………………………21
5.1.1前轴受力简图………………………………………………………………21
5.1.2前轴载荷计算………………………………………………………………21
5.2弯矩及扭矩计算…………………………………………………………………22
5.3本章小结…………………………………………………………………………30
第6章 转向节强度计算………………………………………………………………31
6.1截面系数计算……………………………………………………………………31
6.2弯矩计算…………………………………………………………………………31
6.3应力计算…………………………………………………………………………31
6.4转向节的材料、许用应力及强度校核……………………………………………32
6.5本章小结…………………………………………………………………………32
第7章 主销强度计算…………………………………………………………………33
7.1主销作用力计算…………………………………………………………………33
7.2计算载荷…………………………………………………………………………33
7.3弯矩计算…………………………………………………………………………35
7.4应力计算…………………………………………………………………………35
7.5本章小结…………………………………………………………………………36
结 论……………………………………………………………………………………37
参考文献…………………………………………………………………………………38
致 谢……………………………………………………………………………………39
附 录……………………………………………………………………………………34