【作者】 李勇；

【导师】 姜潮； 张竟；

【作者基本信息】 湖南大学 ， 车辆工程， 2014， 硕士

【摘要】 球笼式等速万向节是轿车的关键部件之一，直接关系到汽车的转向驱动性能，所以提高它的性能与寿命，对提高整个汽车的动力性、操纵性都起着至关重要的作用。球笼式等速万向节是目前应用最为广泛的等速万向节，同类型的万向节结构相同但型号尺寸众多，对其实行产品设计系列化非常必要；滚道受到的应力与其滚道截面形式有很大的关系，滚道设计和制造的能力直接影响万向节的工作能力和使用寿命。本文在综述了国内外相关文献研究的基础上，以球笼式等速万向节为研究对象，对产品进行参数化设计，就目前应用广泛的两种滚道截面万向节的运动学及动力学、接触静态应力等方面进行了研究，并对万向节的滚道进行了优化改进。研究工作如下：1．对目前应用广泛的圆弧型滚道和双心弧型滚道的结构参数进行参数分析，得到各滚道截面参数和结构参数之间关系，对两种滚道进行比较分析；并进行三维参数化设计，建立万向节模型数据库。2．对分别建立好的圆弧型和双心弧型两种滚道截面的球笼式等速万向节模型进行简化；建立基于接触碰撞力的等速万向节动力学仿真模型，就圆弧型和双心弧型这两种滚道截面型式的球笼式等速万向节的运动学特性、动力学特性以及等速万向节的传动效率进行比较分析。3．对万向节模型选取单元类型、材料特性、进行网格划分，添加面-面接触对生成有限元模型，然后通过运算来模拟万向节实际传动工况时各不同滚道之间的应力，对两种滚道截面形式的应力模拟值进行比较分析研究。4．提出了一种新型的三点式接触滚道截面形式结构，对其内外滚道主要结构参数进行设计，对三点式接触滚道万向节进行系统的应力计算。计算结果表明该三点接触滚道能改善球笼式等速万向节内部接触情况，有效减小内部应力，进而可提高产品的承载能力并延长其使用寿命。更多还原

【Abstract】 Ball-cage Type Constant Velocity Joint, one of the key parts of a car, has directimpacts on the steering driving performance of the car.Therefore,to better itsperformance and prolong its lifespan is of vital importance when it comes to enhancethe dynamic property and maneuverability. Ball-cage Type Constant Velocity Joint isthe most widely used among the various ones. Normally the same constant velocityjoints have the same structure but with different sizes so it is of necessity to serializethe product design. The pressure of the raceway receives is greatly connected to itssection form, and as a result of which, the working performance and service life ofthe cardan joint is directly influenced by the design and make of the orbit. Hence,based on previous literatures at home and abroad, this thesis is to take the Ball-cageType Constant Velocity Joint as its research object, to parameterized design theproduct, to study the widely applied section form of the raceway, including thekinematics, dynamics, and contact pressure of statics, and then to further optimizethe raceway. The detailed researches are listed as follows:1.To parametrically analyze the equation and the structure parameter of both thearc raceway and the double-arc raceway so as to get the relation between the curveparameters and the structure parameters. And then parameterized design the jointand finally build the model database of the cardan joint.2.To simplify the Ball-cage Type Constant Velocity Joint whose section forms,namely the arc raceway and the double-arc raceway, the author will be able to buildthe simulation model of the dynamics of constant velocity joint which is based oncontact collision. After that, this paper will make a comparative analysis of thekinematics characteristics, the dynamic characteristics and the transmissionefficiency of the cardan joint.3.To Select the unit type, material characteristics, meshing and add surface tosurface contact pairs to generate finite element model. And then by computing thecontact pressure among different raceways, which produced in the process ofsimulating the real situation of transmitting parts, the study is expected to analyzecomparatively the simulation value of contact pressure of distinct raceways.4.To put forward a new section form of the three-point contact raceway andcalculate the main parameters of the inside and outside of the raceway, analyze the contact pressure of the three-point contact raceway. The result is expected indicatethat three-point raceway can improve the internal contact condition of the Ball-cageType Constant Velocity Joint and can effectively decrease the internal pressure tofurther raise the carrying capability and lengthen the lifespan of the product.更多还原