What is the role of the lower arm ball head?
The bottom arm ball head, as an important part of the car, mainly bears the important responsibility of supporting the body, shock absorber and cushioning the vibration during driving. Once the bottom arm ball head is damaged, it will inevitably affect the comfort and safety of the car.
When the car is driving, the steering wheel shakes when the speed is faster, or the chassis makes an abnormal sound when driving on the bumpy road, which are typical symptoms of the ball head damage of the lower swing arm. In addition, when driving on the bumpy road, the steering wheel may come from the "click, click" abnormal sound, which is an important basis for judging whether the ball head of the lower swing arm is damaged. The lower swing arm, also known as the lower suspension, is also used to support the body, shock absorber, and play a role in cushioning vibration during driving.
For the car, the damage of the bottom arm ball head will directly affect the driving comfort and driving safety, so we must pay enough attention to it.
In order to determine the specific part of the damage, we can use a jack or a lift to lift the car, and then use the hand to continuously pull the wheel, left and right up and down multiple inspections. By observing the shaking and virtual position, we can initially determine whether the ball head of the steering machine or the ball head of the upper and lower swing arms has a problem.
In addition, hold the transverse tie rod or straight tie rod, gently shake from side to side, check whether there is loosening phenomenon. If the hand can obviously feel the swing, then there may be a problem in the part, and it needs to be replaced in time to avoid more serious consequences.
At the same time, we can also check the clearance by shaking the wheel in both horizontal and vertical directions. If you find a gap, you can determine whether it is the problem of the direction machine, the ball cage or the lower swing arm according to the position.
In the process of driving, whether it is bumpy road or flat road, if the direction Angle is large when the "card, card" sound, then it is likely to be damaged ball cage. When driving on the bumpy road, if the chassis makes a 'boring, boring' sound, there may be a problem with the balance rod.
Which specific part is seriously worn needs to be judged according to the moving position of the ball head. No matter which ball head is seriously worn, it may feel the wheel shaking, jumping or swinging when driving at low speed. At the same time, the steering is not sensitive, blunt, and the phenomenon of rubber sleeve damage and oil leakage of the ball may be a sign of damage to the ball head.
The main roles of the front suspension hem arms include supporting the body, shock absorption, cushioning vibrations during travel, and supporting weight and steering.
Body support and shock absorption: hem arms support the body, while shock absorbers also play a very good auxiliary role. When the vehicle is in the process of running, the lower swing arm can absorb and cushion the vibration of the driving, provides a smooth driving experience.
Support weight and steering: the lower swing arm is also equipped with a rubber sleeve, to play a fixed role, and connected to the shock absorber. damage to the rubber sleeve will cause abnormal noise when driving, shock absorption effect is poor, and even heavy steering. serious damage may even cause the swing arm to break, and then cause the vehicle out of control, therefore timely replacement of damaged lower swing arm is very important.
Buffer vibration: in the process of driving, the car will inevitably encounter a variety of uneven road conditions, and the lower swing arm and shock absorber work together, can effectively absorb and reduce these vibrations, improve the comfort of the ride.
Material diversity: hem arm material is more diverse, including aluminum alloy, cast iron, double layer stamping parts, single layer stamping parts and so on. different materials have advantages and disadvantages, , for example, although the stamping parts have good toughness, is easy to break when subjected to strong impact.
Antirust treatment: because the lower swing arm is located at the connection between the front tire and the body, is easily exposed and affected by environmental factors, therefore, it is very important to check whether it is rusted regularly and treat it in time.
In general, front suspension hem arm plays an important role in the automobile suspension system, by supporting the body, shock absorption and cushioning the vibration in the driving, support weight and steering and other functions, to ensure the stability of the vehicle and ride comfort.
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