Three-Dimensional Solid Modeling and Strength Analysis of Gearbox for Baja Racing Vehicle Transmission

This chapter aims to provide a theoretical basis for the design and optimization of the transmission system for Baja racing vehicles. Addressing the prevalent issue of inadequate transmission design and simulation, this study focuses on the gear design and strength analysis of the manual transmission for Baja racing cars. Utilizing Creo, parametric 3D solid modeling of the transmission gears was conducted, followed by strength verification based on bending strength theory and ANSYS simulation software. In selecting the transmission type, a manual transmission was chosen, and key parameters such as the overall transmission ratio, number of teeth for driving and driven gears, pitch diameter of the driven gear, module, face width, helix angle, center distance, and normal pressure angle were meticulously designed. The 3D modeling of the transmission gears, facilitated by Creo, ensured the precision and visualization of the design. To validate the design’s rationality, bending stress in the transmission gears was calculated using bending strength theory formulas, and a safety factor check was performed. Furthermore, finite element analysis (FEA) was conducted on the gears using ANSYS, yielding stress distribution contour. The results indicated that the maximum Mises stress value was significantly lower than the material’s yield strength, verifying the reliability and safety of the design. In conclusion, the combined use of Creo and ANSYS enables rapid and efficient design and strength verification of Baja racing transmission gears, offering an effective approach for optimizing the powertrain system.