【作者】 于孟；

【导师】 周新建；

【作者基本信息】 华东交通大学 ， 载运工具运用工程， 2010， 硕士

【摘要】 沙滩车是一种介于摩托车和汽车之间的产品,因其独特的结构可以自如地行走于沙滩、沼泽、坡地等复杂路面,随着消费者的需求的增加及创新技术的实现,沙滩车迅速地发展起来。差速器是沙滩车的重要部件之一,主要用于保证沙滩车两侧车轮在行程不等时能以相应的不同转速旋转,从而满足其行驶运动学要求,消除左右车轮在运动学上的不协调。因此,其性能好坏对沙滩车的动力性能有着很大的影响。本文以最具有代表性的Eaton差速器为参考设计原型,设计出了一款适用于大排量沙滩车的机械锁止式差速器,详细介绍了差速器齿轮机构的设计方法,对沙滩车差速器的其他关键部位进行了设计分析,并对它们进行了强度计算。利用Pro/E软件实现了差速器的三维建模,并实现了差速器整体的虚拟装配。本文介绍了ADAMS及其与Pro/E之间的数据转换方式,并将Pro/E模型导入到ADAMS中去,添加了系统载荷和约束,讨论了齿轮接触碰撞参数的选取,最终完成了沙滩车差速器虚拟样机的建立。对沙滩车几种工况进行了运动学和动力学分析,包括了高速直线行驶、低速直线行驶、起步、转弯等工况,并针对其自锁与解锁功能进行了运动学仿真分析。分析结果对改善机械传动系统动力学性能和关键零部件设计有一定的指导作用,为其主要部位的齿轮载荷获取以及疲劳寿命预测提供了新的研究方法,同时为沙滩车差速器的优化设计提供了依据。更多还原

【Abstract】 ATV is a product between motorcycles and cars, which can freely walk in sand, swamps, sloping field and such complex pavement because of its unique structure. With the increase of consumers’demand and the realization of technology innovation, ATV developed rapidly. As one of the important parts of ATV, differential is mainly used to ensure ATV wheels in both sides to travel with different rotating speed in order to meet the requirements of kinematics and eliminate the incoordination of the both driving wheels on kinematics. Therefore, its performance has a direct influence on the dynamic properties of ATV.This article was based on the most representative Eaton differential, designed a mechanical locking differential applicable to large displacement ATV, detailed introduced the design method of differential gears, and did the design analysis for the key parts of the ATV differential, then did the strength calculation for them. The 3D model of the ATV differential was built using the software Pro/E, and then its whole virtual assembly was realized.This thesis introduced the data-shift method between the software ADAMS and Pro/E. And I transmitted the Pro/E model into ADAMS, added the restriction and the load on system,chose the impact-contact parameters of the gears, at last built the whole virtual prototype model of the ATV differential. Also I executed the dynamic and kinematic analysis for its several working conditions such as high speed straight line travel, low speed straight line travel, breaking away and cornering, and then I did the kinematic analysis according its self-locking and self-unlocking function. The analysis result not only provided some guidance to improve the mechanical transmission system dynamic performance and the design of its key parts, and also gave new method for the achievement of the load of gear and its fatigue life prediction, as well as offered basis for the optimization design of differential ATV.更多还原