• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (5): 67-76.doi: 10.3901/JME.2023.05.067

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Configuration Principle and Dynamic Antiskid Mechanism of Non-circular Face Gear Differential

LIU Dawei1, LI Bingbing1, FU Zhanglei1, JIN Xin2   

  1. 1. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004;
    2. National Engineering Technology Research Center of Cold Rolling Strip Equipment and Technology, Yanshan University, Qinhuangdao 066004
  • Received:2021-05-17 Revised:2022-12-15 Online:2023-03-05 Published:2023-04-20

Abstract: For the difficult manufacture of the core components and the unknown dynamic slip-limiting mechanism of the variable transmission ratio differential, a new type of variable transmission ratio differential based on non-circular face gear is presented, with the configuration principle and dynamic antiskid slip mechanism of the differential studied. The transmission principle of cylindrical gear and non-circular face gear is given to illustrating the the configuration principle of the new differential. For the condition that the vehicle is in trouble due to the skidding of the single-side drive wheel, the kinematics expression of the non-circular gear differential is obtained according to the mechanism rotation method. Based on the theory of advanced dynamics, the mechanics equilibrium equation of each component of non-circular face gear differential is constructed, with the vehicle traction force formula deduced. Then a dynamic model of horizontal movement of the vehicle driven by a non-circular face gear differential is established. The torque distribution of the differential on the two driving wheels, the change of dynamic traction force and the vehicle's escape behavior are studied by the method of test and simulation. The results show that the non-circular gear differential makes the slip wheel produce periodic inertia torque, which is beneficial to improve the maximum traction force of the vehicle and is the fundamental reason for the dynamic antiskid slip of the variable transmission ratio differential. Increasing the input speed of the differential not only could effectively improve the average speed of the vehicle out of distress but also increase the amplitude of the flexible impact on the vehicle. The research results provide a certain theoretical basis for the design of variable transmission ratio differential.

Key words: noncircular gear, differential, vehicle dynamics, anti-skid mechanism

CLC Number: