The most prominent feature of planetary gear transmission is to change the fixed axis transmission of ordinary gear transmission to the dynamic axis transmission, and to conduct power diversion when transmitting power. The combination and decomposition of motion can be realized by using a reasonable internal meshing method, using multiple planetary gears to share the load and using a load sharing device, which makes the planetary gear transmission have many advantages, such as light weight, small volume, large transmission ratio range, unlimited bearing capacity, high transmission efficiency, smooth movement, strong impact and vibration resistance.
Taking a class A wheel side electric drive vehicle as the research object, a set of wheel side reducer is designed. Calculate the resistance that needs to be overcome in the driving process of the vehicle from the theoretical point of view, determine the type and specific parameters of the selected motor, calculate the reduction ratio required by the reducer in this design and determine the transmission scheme of the reducer according to the demand and empirical formula, and then conduct further research and calculation on the mechanism to determine the size parameters and meshing parameters of each gear in the transmission system. Select the material of each gear and carry out strength check, and carry out finite element analysis on the main torque transmission parts to analyze whether they meet the strength requirements.
In view of the different driving modes of electric wheel and traditional car, when selecting the planetary gear transmission system, the transmission mode of traditional sun gear input planetary carrier output is not selected, but the internal gear ring output is innovatively used. According to the use requirements, design the planetary gear of the transmission system and check its strength. Finite element analysis is used to analyze the strength of several main stressed parts in the reduction system to meet the strength requirements.