INFLUENCE OF SURFACE COATING ON HERRINGBONE GEAR ASSEMBLY OF AN ELECTRIC VEHICLE

Abstract: Electric vehicles are gaining more and more popularity all around the globe. As the demand for electric vehicles (EVs) continues to rise, it becomes increasingly important to develop efficient and reliable gear systems to meet the high-performance requirements of these vehicles. Herringbone gears, known for their improved load-carrying capacity and reduced noise, are commonly employed in high-speed applications such as EV powertrains. However, gears used in EVs need to withstand high loads, operate at high rotational speeds, are vulnerable to failure due to the surface stresses and bending that occur at their teeth, which results in a surface fatigue failure known as pitting. This study aims to investigate the stress analysis of Herringbone gears assembly used in single stage step-down transmission of EV's and evaluate the impact of coating on gear surface for reduced stress to enhance their performance and reliability. In this paper, herringbone gears that are utilised in gear box of EV's are designed using low alloy, 4140 normalized steel in Solid works. Finite Element Analysis (FEA) is performed using Ansys to forecast the equivalent (Von-Mises) stress, the total deformation, the equivalent elastic strain, and the regions susceptible to fatigue failure....