Ball Joint

Applicable models

In automobiles, Ball Joint is a spherical bearing that connects the control arm to the steering knuckle, and is used in almost all automobiles manufactured. They are bionic similar to the ball and socket joints in most quadrupeds.Tarzan auto parts---Our inventory includes all auto parts sold in the world, including Dongfeng, Sinotruk, Howo, FAW Honda, Toyota, Volkswagen, Volvo, etc. Welcome to buy.

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Working principle

Ball joints are used to allow free rotation in two planes at the same time, while preventing translation in any direction, including rotation in these planes. Combining two such joints with a control arm can move in all three planes, allowing the front end of the car to steer, and the spring and shock absorber (damper) suspension makes the ride comfortable.
A simple kingpin suspension requires that the upper and lower control arms (cross arms) have parallel pivots and have a strict geometric relationship with the kingpin, or connecting the kingpin to the top and bottom trunnions of the control arm will be severely affected. Force, the bearing will suffer severe wear. In practice, many vehicles are equipped with elastic bearings in the horizontal pivot of the trunnion, which allows some small flexibility, but this is not enough to allow a lot of adjustments to the casters, and also introduces suspension designers that may not want Compliance is his pursuit of the best controllability. The camber angle can usually be adjusted by moving the two inner pivots of the upper control arm or the lower control arm inward or outward by exactly the same amount. However, the compliance of the pivot in the control arm is usually due to the use of elastic bearings, which will again cause the trunnion to be stressed. The freedom of the suspension designer is limited, it is necessary to have some compliance where it may not be needed, and there is little more use in absorbing front and rear impact loads from bumps.

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