The universal joint, also known as the ball joint, is a crucial component of a car. It adopts a spherical connection method, which can transmit power between different axes. When the front wheel ball joint of a car is damaged, it will show a series of symptoms, such as making abnormal noises when driving on bumpy roads, unstable driving and swaying left and right, leaning to one side when braking, and steering wheel failure. If the clearance of the ball head is too large, it is easy to break when impacted, so timely maintenance of the ball head is crucial to ensure driving safety. Among them, the outer ball head is connected to the handle rod, while the inner ball head is connected to the steering wheel rod.

Although the outer and inner ball heads are separate, they must work together. The steering ball head is connected to the sheep horn, while the handle ball head is connected to the parallel rod. Through spherical connections, the car ball head can flexibly transmit power between different axes, providing multi angle rotation to ensure smooth operation of the steering mechanism, reduce vibration, and achieve smooth steering.

Universal joint, also known as ball joint, is a key mechanical structure that uses spherical connections to transmit power between different shafts. It is combined with the transmission shaft to form the so-called universal joint transmission device. In front engine rear wheel drive vehicles, the transmission device is placed between the transmission output shaft and the drive axle main reducer input shaft. On vehicles with front engine and front wheel drive, due to the omission of the transmission shaft, the universal joint is directly installed between the front axle half shaft and the wheels, which are responsible for both driving and steering.