Xiao Bian found that many netizens had certain misunderstandings about the axle driving problem. Many of them tangled up with whether the bridges in the 8x4 and 6x4 double linkage bridges were driven axles. The problem of mid-bridge drive seems very complicated, but as long as careful observation will find it is very simple, from below, we may wish to analyze, to solve the problem of dual-linked bridge drive the answer.

After the drive problem of the double bridge has been plagued many card friends

After searching the “back axle drive” in the forum, you will find a lot of questions about the rear axle in the vehicle. For example, some netizen said “8x4 double bridge driven car is nothing more than adding a drive axle, one more bearer. The weight of the car's axle, the bridge is only used as a follow-up bridge to carry the weight of the vehicle, this single-bridge drive is set to save fuel." After the survey found that most of the problems similar to this.

In the final analysis, the biggest difference between the double-linked drive axle and the single-drive axle is whether there is a “bridge bridge transition box structure”. If only the rear axle is driven, the engine output shaft is directly connected with the through shaft and the input shaft is not combined with the transition box gear group.

The big drum kit below the input shaft is the "middle bridge transition box"

However, if it is a double linkage axle and the middle and rear axles are driven at the same time, there must be a gear set that connects the middle bridge in the middle bridge transition box, and there will be an extra bulging “big drum kit” on the appearance of the chassis.

Compared to Zhongqiao, the rear axle is simple in structure and is not equipped with a bridge differential

The main function of the "inter-bridge differential" in the double-linked bridge is to allow differential action between the middle bridge and the rear axle during driving. For the double linkage bridge with differential lock between bridges, when the differential lock is closed, the differential cross shaft planetary gear meshes with the two axle shafts, and acts as a differential speed on uneven roads. The bridge is driven at the same time; when the differential lock is closed, the binding sleeve is bound through the shift fork to promote the rigid connection of the rear and rear axles of the vehicle so as to achieve the same purpose of input torque of the rear axle.

Because there is no bridge transition box and bridge differential, the rear axle structure is relatively single

In addition, the existence of differential between bridges and differential locks between bridges only changes the distribution of speed and transmission torque between the rear axles, and does not affect the nature of dual linkage bridges. Therefore, these two mechanisms only play an auxiliary role in the form of movement of the rear dual linkage bridges.

● Postscript

For the bridge-driven problem, I believe there are still many card members who are guilty of dizziness. However, through this simplest method today, maybe everyone can identify the driving mode of the rear axle in the future. , It is better to grasp the practical application more quickly so that you can practice it more intuitively.

Hubei Suizhou Xigong Chu Sheng Special Vehicle

Contact person: Mr. Wang Telephone number

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