It is the guide and support of the suspension, which affects the wheel alignment and reduces the driving stability. The vertical arm type suspension system is the suspension structure of the wheel in the longitudinal plane of the vehicle, which is divided into two types of single arm type and double arm type. When the wheel is up and down, the single arm type suspension can make the main pin to produce a large change, therefore, the single arm type suspension is not on the steering wheel. Double arm type suspension of the two swing arm is generally made of equal length, the formation of a parallel four bar structure, so that when the wheel on the main pin of the rear inclination to remain unchanged, so double trailing arm type suspension is more applied in the steering wheel. The Jetta car rear suspension with a single trailing arm type suspension system.
The vehicle swinging arm is composed of a (5 – 3) root link to control the change of the position of the wheel. Multi link to make the wheels around the second angle of the axis of the swing in a vertical line with the vehicle, is a compromise between the cross arm and trailing arm type, the proper choice of the swinging arm axis and the vehicle longitudinal axis of the angle, different degree obtained the advantages of transverse arm type and trailing arm type suspension, can meet the requirements of different performance. The main advantage of the multi link suspension is: during wheel bouncing track and beam before the change is very small, regardless of the car is in driving, braking can according to driver’s intentions were smooth steering and its deficiency is a high-speed car with shaft swing phenomenon.
Front swing arm: it is the guidance and support of the suspension, its deformation affects the wheel alignment, and reduces the driving stability.
The lower arm: its main role is to support the body, shock absorber and buffer the vibration in running. The shock absorber can play a very good role in the suspension. It with spring damper and the tacit understanding cooperates to constitute a set of excellent suspension system. Hem arm rubber sleeve is broken for rubber sleeve and hem arm ball bad for hem arm the. The normal running, generally due to road and hem arm life. About 8w/25w.