某工程车铰接装置优化设计

Optimization Design of Articulated Device for An Engineering Vehicle

针对某铰接式工程车交接装置处容易损坏、断裂的现象,建立其满载时的多刚体转向虚拟样机模型并进行仿真分析,发现该车的单自由度交接装置在车辆通过矩形坑路面时,前机架与交接装置销轴接触处存在应力过度集中现象,是交接装置损坏的主要原因。将单自由度交接装置设计改进为双自由度交接装置,并建模进行仿真分析,验证了设计后车辆在通过障碍路面时,前后交接装置及车体力学性能明显优于单自由度情况,材料安全系数及可靠性大大增强,可以避免交接装置及车体的损坏现象。

Aiming at the phenomenon that the hinge mechanism of an engineering vehicle is easy to be damaged and broken, the multi-rigid-body-to-virtual modal is designed and simulated. It is found that the single- degree-of-freedom articulation mechanism of the vehicle, when passing through the rectangular pavement, there is excessive stress concentration in the contact between the front frame and the hinge plate pin, which is the main reason for the damage of the hinge mechanism. The two-degree-of-freedom hinge mechanism is designed for the vehicle. The simulation results show that the mechanical properties of the hinged device and the vehicle body are better than those of the single degree of freedom. The safety factor and reliability of the vehicle are greatly enhanced to avoid the hinge device and the body of the damage.