The car's wheels can automatically return to the rear after steering, mainly because the steering wheel is positioned to play a role, in which the kingpin back tilt and the kingpin inversion play a decisive role in the automatic return of the steering wheel. The positive returning effect of the kingpin backwards is related to the speed of the vehicle, and the positive returning effect of the kingpin's inward tilt is almost independent of the speed of the vehicle. Therefore, when the car is driving at a high speed, the backlash has a large positive effect, and at the low speed, it mainly depends on the inward tilting back. In addition, when the steering wheel is occasionally subjected to an impact and deflected in a straight line, the main pin is mainly tilted back to the positive action.
Knowing this principle, let's analyze why the steering wheel does not return itself. To be sure, it is the problem with the steering wheel of the car. So what factors will change the steering wheel positioning? Common faults are damage to the knuckle pin plane bearing, excessive wear of the knuckle pin bushing (that is, our so-called "vertical axis" is broken), loose or damaged steering wheel bearing, knuckle deformation, etc. In addition, the front bow piece is broken, the center screw is broken, the riding bolt is loose, and the bow shaft is broken, which causes the front axle to be in series. The entire steering wheel position has changed completely, and naturally it cannot be automatically corrected. These failures require disassembly repairs. There is also a possibility that the bearings and sleeves of the steering pin and the steering ball are poorly lubricated, resulting in excessive resistance of the steering wheel, which may cause the steering wheel to not automatically return. At this point, just lubricate these parts. It should be noted that when buttering these parts, the wheels should be lifted, otherwise the butter will not be able to enter.
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