Carriage arm assembly, and the use of the vehicle suspension system of a vehicle suspension system

The present invention relates to a carriage arm assembly, and the use of the vehicle suspension system of the vehicle suspension system. Wherein the arm assembly comprises a bracket and / or the left and right between the left carriage arm bracket arm integral with both ends of a central axle and are fixedly connected to the distal end of the right arm bracket, the left and right bracket arms of the carriage arm with both ends of the left and right carriage arm or carriage arm fixedly connected hingedly connected beams, between the rear end to end connecting beam portion of the carriage arm. Connecting beams capable of enhancing the stability of the carriage arm between the left and right arm and the bracket integral axle, to prevent the left and right of the front end of the pitch and the rear end of the carriage arm spacing is changed, to avoid irregular movement of the axle; and can improve the stress state of connection between the axle integral with the left and right bracket arms of the carriage arm, the connection reliability of the holding arm integral with the axle, while improving the supporting arm bear moment distribution, thereby facilitating mitigation corbel quality, material cost savings, reducing the unsprung mass of the vehicle, to improve the ride comfort.