某装甲车辆斜切口连杆组设计

摘要发动机是车辆的心脏，而曲柄连杆机构是组成发动机的不可缺少传动件，它连接曲轴和活塞，将力进行传递，传递路线为活塞到曲轴，并将运动方式进行转换，把活塞的往复运动转换为曲轴的旋转运动，用这种方式来完成力的传递和对外进行功率的输出。连杆小头和活塞销连接做往复直线运动，连杆大头和曲轴连接做旋转运动，整个连杆组的运动为复杂的平面运动，连杆组性能的好坏对发动机性能和输出功率有很大的影响，所以对连杆组的设计和分析非常重要且有意义。本课题主要从以下几个方面展开研究：(1)掌握V型发动机内部曲柄连杆机构的运动关系，对连杆进行了运动分析和受力分析。(2)对连杆组进行设计，包括连杆小头、连杆大头、连杆杆身。(3)对连杆组进行强度校核。关键词：连杆；设计：强度校核：受力分析Design of miter cutout connecting rod group for an armoredvehicle engineAbstractThe engine is the most important part of the car,is also known as the car heart win,andthe rod is the key transmission part,the connecting rod connects the crankshaft and the piston,the force acting on the piston to the crankshaft,the reciprocating movement of the piston intothe rotating movement of the crank shaft,and external work.When the small tip of theconnecting rod is working,it is connected to the piston by the piston pin;when the head endof the connecting rod is working,it is connected to the crankshaft for rotational motion.Because the rod body is more complex plane movement,so the force of the connecting rod isvery complex.Therefore,the design and analysis of the linkage mechanism is veryimportant.The main research contents of this paper are as follows:(1)Master the motion relationship of the internal crank connecting rod mechanism of theV-type engine,and from the kinematics of the force analysis of the link.(2)Design the linkage group,including the linkage head,the linkage head,and theconnecting rod shaft.(3)Check the strength of the connecting rod.Keywords:Connecting rod;Devise;Strength check;Force analysis目录1绪论.1.1研究背景及意义.1.2发动机连杆组研究现状…1.3内燃机运动机构的形式及分类31.3.1按内燃机运动机构的基本形式分类31.3.2按内燃机运动机构的组合形式分类1.4本课题研究内容.…52连杆组的运动和受力分析2.1连杆组的运动学分析…72.1.1活塞的运动分析72.1.2连杆的运动分析82.2连杆组的受力分析.92.2.1气体对活塞的压力..92.2.2活塞组的惯性力102.2.3连杆组的惯性力…102.2.4曲柄的离心惯性力112.2.5螺栓的预紧力.112.3本章小结123连杆组的设计…133.1连杆组的设计.…133.1.1连杆的工作情况及设计要求和材料选用3.1.2连杆长度的设计133.1.3连杆小头的结构设计与强度校核.133.1.4连杆杆身的结构设计与强度校核163.1.5连杆大头的结构设计和强度校核203.2连杆螺栓的选择.…。223.2.1连杆螺栓的工作负荷与预紧力223.2.2连杆螺栓的屈服强度校核和疲劳计算24