Dynamic optimization of driving axle hypoid gears based on tooth contact characteristics control 2019-01-1563
Hypoid gear is widely applied on automotive axle to transmit movement and power between crossed axle, and its meshing transmission has a significant influence on driving system noise of complete vehicle. Therefore, the drive noise of main hypoid gear pair at drive axle should be strictly controlled to reduce the complete vehicle noise. Meshing internal excitation of hypoid gear is a main source of vibration noise, closely connected with geometrical shape and meshing status. There is no comprehensive analysis on the impact of various contact patterns on vibration noise in previous studies. Therefore, the accurate control method of contact characteristics of hypoid gears is studied in this paper. A mathematical model based on static and dynamic contact FEM, established to calculate time-varying meshing stiffness, transmission error, meshing damping and internal excitation force, here was used to analyze the influence of internal excitation force of gear pair with different contact pattern forms, including mid-position of contact pattern, length of contact pattern, direction of contact trace, and angular acceleration of relative motion (transmission error). The meshing excitation dynamic model of the hypoid gear pair of the driving axle is established, and the dynamic response of the gear pair is optimized by reasonably controlling the contact characteristic parameters of the gear pair, so as to effectively reduce the vibration and noise of the driving axle.