The differential is an integral part of both the truck and the car. It was invented more than 100 years ago by Luis Reno, a French Renault founder, and has been in use ever since. We all know that the differential is when the car turns, automatically adjust the speed of the wheel on both sides, then what does it look like and how does it work?

It is composed of differential shell, left and right half shaft gear and cross shaft, the driven gear of main reducer is installed as a whole, and the differential in the differential housing axle differential in other words, is the main reducer in the assembly together, it is a speed reducer in the main.

The first is to change the role of differential power transmission direction, the half axis on both sides of the wheel when the vehicle turning automatically two shaft to rotate at different speeds, as far as possible to make the wheels rolling form do isometric movement, reduce the turning resistance when also reduce tire wear.

The inner teeth of the planet only revolve around the semi axis gear, when the speed of the wheels on both sides is equal, the differential does not work, and the vehicle is in a straight line.

When the turn when, in the inside wheel received resistance increases, the resistance through the half shaft reflected to the axle shaft gear, planetary gear rotation forces began to produce, make the inside and outside of the half axle gear speed is accelerated, the inner wheel and the outer wheel speed slow rotating speed, the wheels on both sides of the automatic is not isometric exercise.

The above is a single drive axle of the vehicle mounted on the driving axle bevel gear, if 6x4 or 8x4 such vehicles, because the two axle driving at the same time, in order to deal with some road conditions, there must be two will set up a drive shaft between the inter axle differential.

Because the double drive vehicle in some ups and downs or special road conditions, two axle speed will produce inconsistent phenomenon, inter axle differential is to adapt to these situations and settings, it is usually installed in the first drive axle of the transition gear box, the working principle and the same inter wheel differential.

In some special cases, the differential is counterproductive, for example, in winter when the side of the wheel will encounter the ice, because of the differential effect, the power to a small automatic resistance distribution, then it will cause the unilateral wheel slip vehicles can not travel, the role of differential lock at the same time emerged. Differential lock simply means that the two sides of the axle into a rigid shaft, so that the differential stopped working, both sides of the wheel at the same time be driven to help the vehicle out of trouble.

The differential locks on our trucks are basically mechanical, and they perform differential locks through the engagement and separation of a slip sleeve. But in the use we should pay attention to, when the differential lock dead, the vehicle is not turning, if the damage forced turn will cause differential, so it is important to note that when in use, after the rescue will lift differential lock, so as to avoid unnecessary losses.