汽车四轮转向传动系统设计说明书.doc -- 8 元

哈尔滨工业大学华德应用技术学院（论文）I摘要本文主要研究了四轮转向传动系统的基本结构和工作原理，并对四轮转向传动路线进行了简要分析。以此为理论基础，以某汽车的相关参数设计了四轮转向转向器。包括前轮转向器的设计计算，后轮转向执行器的设计，齿条等强度的计算。四轮转向传动系主要是通过车速传感器、前轮转角传感器、前轮转速传感器、方向盘转角传感器、后轮转角传感器、后轮转速传感器，发送信号到四轮转向控制器内，信号经过处理，得出后轮所需的转角大小及方向，控制执行器完成转向。此系统可以改善车辆低速的转向灵活性和高速时的操纵稳定性，使汽车在转向时响应快，转向能力强，直线行驶稳定。前轮转向器是四轮转向的基础部件，是电机助力的齿轮齿条转向器。后轮执行器是驱动后轮转向的主要部件。通过对前轮转向器和后轮执行器的设计，为四轮转向技术整体设计提供了基础。关键词四轮转向，齿轮齿条电动助力转向器，后轮转向执行器哈尔滨工业大学华德应用技术学院（论文）IIAbstractThispapermainlystudiesisthefourwheelsteeringtransmissionsystemthebasicstructureandworkingprinciple,andthefourwheelsteeringtransmissionroutesarebrieflyanalyzed.Thistheory,withacarrelatedparametersofthefourwheelsteeringtransmissionsystemwasdesigned.Includingfrontwheelsteeringgeardesigncalculation,rearwheelactuatordesignstrengthcalculation,rack.Fourwheelsteeringtransmissionsystemisprimarilythroughspeedsensor,frontwheelAnglesensor,frontwheelspeedsensor,steeringwheelAnglesensor,rearAnglesensor,rearLordAnglesensor,rearvice,rotationalspeedsensorsendsasignaltothefourwheelsteeringcontrollerinside,signalthroughprocessing,drawtherearrequiredcornersizeanddirection,controlactuatorfinishturning.Thissystemcanimprovevehiclespeedsteeringflexibilityandhighspeedcontrolstabilityof,makecarsinsteeringresponsequickly,steeringcapabilityisstrong,runstraightstability.Frontwheelsteeringgearisthebasiccomponents,fourwheelsteeringmotorhydraulicallyrackandpinionsteeringgearRearactuatorsaredriverearwheelsteeringthemajorcomponents.Throughthefrontwheelsteeringgearandrearactuatorisdesignedforfourwheelsteeringtechnologyintegraldesignprovidesthebasis.KeywordsFourwheelsteeringgearrackofelectricpowersteeringgear,rearwheelactuators哈尔滨工业大学华德应用技术学院（论文）III目录摘要...............................................................IAbstract..........................................................II目录.............................................................III第一章绪论...................................................1第二章设计方案选择..........................................72.1各传感器位置确定.....................................72.2转向机构的设计要求...................................82.3转向梯形设计..........................................92.4本章小结.............................................11第三章齿轮齿条电动助力转向器设计计算......................113.1转向器的效率.........................................113.2转向器正效率η......................................113.3转向器逆效率η......................................123.4传动比的变化特性....................................133.4.1力传动比与角传动比的关系........................143.5参数选择.............................................163.5.1转向轮侧偏角计算................................173.6转向系载荷确定.......................................183.7转向器的主要元件设计................................213.7.1选择齿轮齿条材料................................213.7.2齿轮齿条基本参数................................233.7.3转向横拉杆及其端部..............................243.7.4齿条调整.........................................253.8齿轮齿条转向器转向横拉杆的运动分析.................263.9齿轮齿条传动受力分析................................273.10弹簧的设计计算......................................32哈尔滨工业大学华德应用技术学院（论文）IV3.11齿轮轴轴承的校核...................................353.12电机选择............................................363.12.1助力转矩的计算.................................363.12.2电动机参数的选择和计算.........................373.13本章小结............................................38第四章后轮转向执行器设计计算...............................394.1执行器结构设计.......................................394.2齿条设计计算.........................................404.3回位弹簧的设计计算..................................404.4电机选择.............................................424.4.1助力转矩的计算..................................424.4.2电动机参数的选择和计算..........................424.5本章小结.............................................43结论..........................................................44致谢..........................................................45参考文献......................................................46附录..........................................................47