Abstract
In view of the problems in the use of wheel side drive system, torsion beam type electric driving axle is proposed for the solution. First, with the vehicle parameters of a certain electric vehicle as a sample, the torsion beam driving axle is matched and designed and the three-dimensional model was drawn with the help of CATIA; secondly, the stiffness and strength of the driving axle are analyzed with the help of ANSYS software under five working conditions; finally, the modal analysis of the driving axle structure is carried out. It is verified from the three aspects of stress, deformation and inherent mode that the designed driving axle can meet the limit requirements of China's national standards for vehicle driving axles, which proves the rationality and effectiveness of the design scheme.
Highlights
The common driving form of electric vehicle is the same as that of traditional internal combustion engine
Through the analysis of the advantages and disadvantages of the above two rear wheel drive types of distributed drive vehicles, this paper focuses on the improvement of the shortcomings of the wheel side drive system
Aiming at the problems that the motor of wheel side drive system is vulnerable to large lateral force during driving, and the failure of one wheel side drive motor will lead to abnormal driving and poor fault tolerance, this paper proposes a scheme based on the integration of wheel side drive system and torsion beam semi-independent suspension, designs a torsion beam electric driving axle, and carries out three-dimensional modeling and simulation verification
Summary
The common driving form of electric vehicle is the same as that of traditional internal combustion engine. The independent suspension has the advantages of light weight, low body center of gravity and good driving stability, but its structure is complex and its cost is high. The wheels on both sides of the non-independent suspension are connected by an integral frame, which is connected with the. While improving transmission efficiency and saving energy, the lateral force and vibration impact on the motor itself during driving can be reduced with the help of the damping performance of the semi-independent torsion beam suspension. The torsion beam connects the drive motors on both sides At this time, each drive motor on the vehicle drives a single-sided wheel independently through the reducer. The integrated design of the driving axle can enhance the transmission of force and torque between the vehicle and the wheel
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