Projeto preliminar de um sistema pinhão-cremalheira para uma caixa de direção de um protótipo Baja SAE

Abstract

This work aims to develop a rack and pinion system for the steering box of a Baja SAE prototype. The steering system is crucial for the vehicle’s safety and maneuverability, especially in off-road competitions. Detailed sizing calculations were performed to define the geometric parameters of the gear, such as the pitch diameter, module, number of teeth, and pressure angle. The system’s three-dimensional modeling was done using SolidWorks® software, with numerical simulations based on the Finite Element Method (FEM). Through this technique, it was possible to predict the stresses and deformations on the pinion and rack teeth under load conditions. C45 steel (AISI 1045) was chosen as the material for the assembly due to its ability to withstand the imposed stresses. The simulation results showed that the designed system meets the strength and safety requirements of the Baja SAE competition, ensuring reliable operation during the tests. The use of CAD/CAE tools proved to be essential for the efficient development of the project, and future system optimization aims to improve performance and reduce the weight of the assembly.