Projeto de uma manga de eixo dianteira para um protótipo monoposto off-road tipo mini Baja SAE

Abstract

The steering knuckle is a structural component, directly related to the safety of the vehicle, responsible for interconnecting various components of different systems, such as suspension, steering and brake. This work aims to determine the dynamic factors of the vehicle that are associated with the geometry of the steering knuckle, from the kinematic simulations performed with the aid of the ADAMS View multicorps simulation software, thus evaluating which geometry presents the best kinematic and consequently dynamic behavior. From this it was proposed an improvement of geometry, in relation to the project currently used by the Pato Baja team, in order to have a good kinematic and fabricable behavior. The design of the steering geometry was also carried out through a program developed in the Mathcad software, to determine the inclination and length of the steering arm, which presented the least possible stepping effort, with a turn of the steering wheel between 90 and 135°, to ensure a rapid response of the pilot, aiming for an improvement in handling and lowering the necessary steering steers, while also reducing the mass of the steering knuckle made of 7075-T651 aluminum. Based on initial modeling, the stresses acting on the steering knuckle were determined for the finite element simulation. Based on the structural simulation, a new modeling was performed, achieving a reduction of 30.3% in the ground arm and 6.23% of the mass of the steering knuckle, compared to the one currently used by the team.