Motion And Static Analysis Of QCBC-1 Cross Axle Universal Joint

As one of important transmission devices used in mechanical transmission and a core for the automobile in drive components, spatial arrangement for the cross shaft universal joint couplings is very important. At present, domestic and foreign research on the cross shaft universal joint couplings mainly focus on the relationship between the drive shaft and the driven shaft, while study on the movement of the cross shaft and it’s stress analysis has not been paid much attention to, therefore, this paper aimed at analyzing the movement and stress of cross shaft to provide reference for the installation and fatigue life design of cross shaft universal joints.The cross shaft of the QCBC-1 cross shaft universal joint coupling is researched.The geometric modeling of the cross shaft universal joint coupling is carried out by using SolidWorks software, and the basic equations of the movement relationship of the plane normal of the cross shaft is established through mathematical vector method,mechanism motion analysis theory, virtual simulation technology, which concludes that the motion trajectory of the plane normal of the cross shaft is a cross axle center for elliptic cone vertex. After the movement of cross shaft journal were analyzed analytically, it is further concluded that the motion law of the cross shaft journal is similar to that of a trigonometric function, the maximum swing angle of which is equal to the included angle between the input shaft and the output shaft. Using motion simulation plugin SolidWorks Motion, the trajectory of the cross axis normal to the plane under the different angle is analyzed by simulation, and Simulation of the yaw rate and the swing angle of the cross shaft journal, The trajectory of the cross axis plane normal of the cross shaft coupling under different angles, the cross shaft journal swing velocity and the swing angle characteristic curve is obtained. Through the analysis of virtual simulation studies of the motion characteristics of the cross shaft carried, the correctness of theoretical analysis is verified, which can provide a reference for the cross shaft universal joint cross-axis design and arrangement of space.With the help of engineering mechanics, finite element analysis theory, the static analysis for universal joint cross shaft couplings is done by using finite element plug SolidWorks simulation, which get stress contours of the cross shaft under different angles. According to the analysis results, the stress concentration of the cross shaft is located in cross shaft journal root fillet. After the arc decay curve principle is used to optimize the cross shaft journal roots, and optimization results are simulated and analyzed, it is concluded that the stress of the root of the neck of the optimized cross shaft is obviously smaller than that of the optimized front. After optimization, the maximum stress of the neck root of the cross shaft is reduced by about 8.33%.