目录前言...........................................................................................................................11绪论........................................................................................................................21.1汽车起重机概述.........................................................................................21.2国外汽车起重机发展概况及发展趋势.....................................................21.2.1国外汽车起重机发展概况...............................................................21.2.2国外汽车起重机发展趋势...............................................................41.3国内汽车起重机的发展概况和发展趋势.................................................51.3.1国内汽车起重机的发展概况...........................................................51.3.2国内汽车起重机发展趋势...............................................................61.4汽车起重机上液压系统的特点.................................................................71.5汽车起重机液压系统的运用现状和发展趋势.........................................81.6课题意义和主要研究任务.........................................................................92QY25K汽车起重机工况分析.............................................................................102.1QY25K汽车起重机简介..........................................................................102.2QY25K汽车起重机液压系统组成及特点................................................112.2.1下车液压系统..................................................................................112.2.2上车液压系统..................................................................................112.3QY25K汽车起重机的各组合、分配及控制............................................122.4QY25K汽车起重机的整机技术参数.......................................................132.5QY25K汽车起重机的工作等级................................................................152.6典型工况分析及对系统要求...................................................................162.6.1伸缩机构的作业情况......................................................................162.6.2副臂的作业情况.............................................................................162.6.3三个以上机构的组合作业情况.....................................................162.6.4典型工况的确定.............................................................................162.6.5系统要求.........................................................................................172.7QY25K汽车起重机主机的工况分析......................................................182.7.1运动分析.........................................................................................182.7.2动力分析.........................................................................................192.7.3液压马达的负载.............................................................................203QY25K汽车起重机液压系统设计.....................................................................223.1QY25K汽车起重机液压系统额定压力的确定........................................223.2QY25K汽车起重机液压系统的基本回路设计........................................223.2.1起升机构回路的设计.....................................................................223.2.2变幅、伸缩机构回路的设计........................................
