The working principle of differential lock is that it can realize the complete mechanical combination of the power of two half shafts, which is very firm. However, the differential lock will only cause serious damage to the tires and other parts of the car when it is used in bad road conditions or extreme conditions and in normal driving.

Although the common differential allows the left and right wheels to rotate at different speeds, when one wheel idles, the other wheel can't get torque on a good road, and the car loses its driving force. In this case, the differential does not work. In this way, when the two wheels are connected together, the power can at least be transmitted to the other wheel, so that the car can get the driving force and get rid of the predicament. This situation also exists in the center differential. In this way, people have developed various differential lock mechanisms.

Function of differential lock:

1. On muddy or snowy roads, when one wheel loses its grip, it means that there is no resistance and the other wheel is fixed there. The rotation of the planetary gears transfers all the power to the wheel that loses grip, but the car can only stand still.

2. At this time, the differential is a reaction to the normal running of the vehicle, so the differential is no longer needed. The function of differential lock is equivalent to forced intervention, which makes the differential stop working and the left and right shafts become rigid connection. The party with resistance has the power to drive the vehicle out of the mire and move on.