低速载货汽车车架毕业设计

目 录

第1章 前言··················································2 第2章 总体方案论证·············································3

2.1 设计选型原则············································3 2.2 设计内容················································4 第3章 主要尺寸参数的选定·······································5

3.1 外廓尺寸················································5 第4章 车架总成设计·············································7

4.1 车架的结构设计··········································7 4.2 车架的技术要求·········································8 第5章 车架的设计计算··········································10

5.1 车架的计算：············································10 5.2 车架载荷分析···········································错误！未定义书签。

5.3 车架弯曲强度的计算·····································错误！未定义书签。

5.4 车架扭转应力的计算·····································错误！未定义书签。 参 考 文 献··················································错误！未定义书签。

第1章 前 言

车架和悬架系统是汽车设计的重要部分，因为它们的好坏直接关系到汽车各个（操控、性能、安全、舒适）性能。

现代汽车绝大多数都具有作为整车骨架的车架。汽车绝大多数部件和总成都是通过车架来固定其位置的，如发动机、传动系统、悬架、转向系统、驾驶室、货箱和有关操纵机构。车架是支撑连接汽车的各零部件，并承受来自车内、外的各种载荷，所以在车辆总体设计中车架要有足够的强度和刚度，以使装在其上面的有关机构之间的相对位置在汽车行驶过程中保持不变并使车身的变形最小，车架的刚度不足会引起振动和噪声，也使汽车的乘坐舒适性、操纵稳定性及某些机件的可靠性下降。过去对车辆车架的设计与计算主要考虑静强度。首先要满足汽车总布置的要求。汽车在复杂多边的行驶过程中，固定在车架上的各总成和部件之间不应发生干涉。汽车在崎岖不平的道路上行驶时，车架在载荷作用下可能产生扭转变形以及在纵向平面内的弯曲变形；车架布置的离地面近一些，以使汽车重心位置降低，有利于提高汽车的行驶稳定性

悬架是车架（或承载式车身）与车桥（或车轮）之间的一切传力连接装置的总称。它的功用是把路面作用于车轮上的垂直反力（支撑力）、纵向反力（驱动力 …… 此处隐藏：1893字，全部文档内容请下载后查看。喜欢就下载吧 ……