Parametric Design And Structural Analysis Of Ball-cage Type Constant Velocity Joint

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.