What are the horns of a car？
The car's horn is called "steering knuckle" or "steering knuckle arm", which is the axle head that bears the steering function at both ends of the I-beam in front of the car, and it is a bit like the horn of the sheep, so it is commonly known as "the horn of the sheep".
The function of the steering knuckle is to transfer and bear the load of the front of the car, support and drive the front wheel to rotate around the kingpin and make the car turn. In the driving state of the car, it is subjected to variable impact loads, so it is required to have a high strength.
There are two arms on the steering knuckle on one side of the front axle near the steering disc, which are connected to the longitudinal rod and the transverse rod respectively, and only one arm on the other side of the steering knuckle which is connected by the transverse rod.
The connection mode of the steering knuckle arm on the steering knuckle is mainly connected through the 1/8-1/10 cone and spline, which is firmly connected and not easy to loosen, but the steering knuckle processing process is more.
The steering knuckle arm is mostly forged from the same material as the steering knuckle, and it reaches the same hardness with the steering knuckle through heat treatment. Generally, increasing the hardness can increase the fatigue life of the parts, but the hardness is too high, the toughness of the original is too poor, and the machining is difficult.
1, the steering knuckle arm or bushing allows a clearance of 0.3-0.5 mm. If excessive wear, should be replaced.
2. When assembling, the bushing should be oiled. And fill the two liners with lithium grease.
In addition to being responsible for steering, the steering knuckle also plays a role in bearing the load at the front of the car, because the front shock absorber of the vehicle is installed on the steering knuckle. During the driving process of the vehicle, the steering knuckle will withstand forces from multiple directions, so it generally has a high strength demand. The steering knuckle is connected to the body by bolts and bushings, and in addition to the central connection with the transmission shaft, the steering knuckle is also the mounting base of the brake caliper and the damper. The design of the original steering knuckle involves the data of kingpin inclination Angle, front wheel inclination Angle and front beam Angle which are closely related to vehicle handling. In addition to these, the steering knuckle is also the connecting part of the various swing arms and connecting rods in the suspension system, which can be seen that although the role of the small thing is irreplaceable.
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