When it comes to off-road vehicles, a must-have indicator is how many locks there are.

What is a lock?

When the vehicle is driving in a straight line, the distance on the left and right sides is the same, and the rotation on both sides is the same, but when it turns, it is different, the outer wheels travel a longer distance, and if the two wheels are connected by an axle, then the car cannot turn.

Therefore, the vehicle has two axles, which are connected by a differential, a large gear, and a propeller shaft to transmit power.

When driving in a straight line, both sides rotate at the same time, and when turning, the inside is resisted, so it does not turn, and the rotation is handed over to the outside to turn, and the task of turning is completed.

This is beneficial and necessary, but in some cases, it can be counterproductive.

What happens when the car gets stuck in a pit? At this time, it is necessary to exert the strength of the wheel on the other side that has not fallen, but due to the effect of the differential, the falling wheel has little resistance, and it begins to rotate frantically, constantly digging holes, while the wheel on the other side, which should play a role on the ground, does not turn, and waits there to sink deeper and deeper.

This is very similar to the multi-core processor of a mobile phone, originally there are more cores, and it is going to play a role, but what is it in reality? One core is in difficulty, and the eight cores are watching, just watching one core run wildly.

At this time, the differential can no longer work, and the half shafts on both sides must be connected together to let the onlookers play a role, which is the differential lock.

The inter-wheel differential lock is to shrink the wheels on both sides to maintain synchronous speed, while the inter-axle differential lock is to maintain the synchronous speed between the front and rear axles, one axle falls, and the other axle can still play a role.

Many off-road enthusiasts are complacent about the fact that their cars have three locks, and advertise themselves as real off-road vehicles, what are those SUVs?

Actually, it's a must-have for big trucks.

The axles of large trucks are set up with differential locks, otherwise, the ability to get out of trouble will be greatly limited, buy the front of a large truck to play off-road, more than 300,000, it is more than 500,000 Wranglers, 1 million Mercedes-Benz big G.

If you still think it's expensive, 100,000 yuan to buy a tractor is definitely better than those professional off-road vehicles.

Ahem, that's too much.

An important difference between the rear axle of Mercedes-Benz heavy trucks and the rear axle of Steyr heavy trucks is the differential lock!

Steyr Bridge is a more traditional axle, after entering the big country in the East, it soon blossomed everywhere, so that an agricultural vehicle, in order to grab the business of cars, began to go on what Steyr rear axle.

And this rear axle, in the design of the technical structure, including external differential lock, wheel side deceleration and central level deceleration, this rear axle in decades of use, the technology is very mature and the accessories are very cheap, in the eastern country market penetration rate is very high

The Mercedes-Benz rear axle is also a wheel side reduction axle. The design structure includes a built-in differential lock and a reinforced differential, while the axle housing is thicker and the load carrying capacity is stronger.

That's right, the biggest difference between the two is that there is an external differential lock and a built-in differential lock, which constitutes the difference in appearance.

The axles are all the same, so as long as you find a set of axles, you can copy the surveying and mapping, as for the key, is the material and processing accuracy!

Not to mention, the planetary gear set on the shaft head needs high-strength steel, otherwise, it will break down in a few months, and if the machining accuracy is not enough, it will grind down a lot of iron filings, increase wear, and increase the noise in operation.

These, in a machine factory here is not a thing, high-strength steel, on the 10,000-ton hydraulic press can be pressed, the quality is improved by several grades, processing accuracy? Processed from a special CNC machine, it has completely reached the accuracy of the original.

For this wheeled armored car, the main technical difficulty overcome by a machine factory is its axle!

After all, there is a specialization in the art industry, in the current situation, as long as the technology of the axle is overcome, all the problems will be solved, and the others, which can be purchased, will be purchased first, and then slowly improve their own localization capabilities.

After all, Rome was not built in a day, and it is impossible for you to become a fat man in one bite.

Qin Zhenhua introduced it to everyone, and when he heard that the technology of this axle had reached the level of Mercedes-Benz heavy trucks, everyone was very interested.

Then, he entered through the back door and continued to look at the equipment inside, while also listening to Qin Zhenhua's introduction.

As a wheeled armored vehicle, of course, it must use a fully enclosed body, and an overpressure semi-automatic collective three-defense system is used inside, after all, it must have combat capabilities under nuclear, biological and chemical conditions.

The interior of the hull is very traditional, divided into three parts: the cockpit, the power compartment and the fighting compartment. The cockpit is located in the front of the hull, which can be observed through the windows of the two bulletproof glass in the front, and in the high-intensity area, the front armor plate can also be closed and observed through the periscope, which is equipped with observation instruments, detection instruments, radio stations, the commander's and driver's seats, and a three-proof fire control box.

The power compartment is located in the middle left of the hull, behind the cockpit. This layout, in fact, is no different from heavy trucks, and the entire chassis is arranged according to the scheme of heavy trucks.

The fighting compartment is located behind the power compartment and has the largest space, with crew seats on the left and right sides. On both sides of the armor plates there were spherical shooting holes for the crew to shoot at the car. At the same time, there is a turret on it.

Due to the hurry, no new turret was developed, and it was nothing more than a rudimentary turret with only a 12.7 mm machine gun as a weapon.

As long as the chassis comes out, the rest can be refined later, and besides, I can't remember, what the troops need, we will add something.

At the same time, in order to have the ability to navigate on the water, on both sides of the rear of the hull, the duct propeller propulsion device integrating the oar and rudder is adopted, which has a simple structure, light operation and large thrust on the water. At the same time, there is also a special electric drain pump inside the car body.

It is difficult to ensure that the armored vehicle is fully sealed and does not leak, so the method adopted is that it does not matter if the water is in, and the water that comes in can be pumped out.

After all, the cost of purchasing and using tracked vehicles is high, and if the troops want to change to mechanized troops, in the future, the demand for wheeled infantry fighting vehicles is estimated to far exceed that of tracked infantry fighting vehicles.

A machine factory will really see the opportunity, and they will build what the troops need.