In a shed in the factory, the car manufacturing order led four young mansion craftsmen and more than a dozen helpers to build four-wheeled carriages, sawing, drilling, and carrying wood back and forth, which looked extremely lively.

A four-wheel frame has been assembled, and the car manufacturing order was directing several helpers to do steering and debugging. Seeing Chen Xu walking in with a group of people, everyone in the shed stopped to salute and greet him.

"No need to be so polite, you guys continue!" Chen Xu waved his hand and walked to the front of the four-wheeled carriage that had already become a prototype and walked around, feeling that it was similar to what he imagined.

"Mr. Marquis, according to the drawings and tips you drew, we just installed the wheels and frame today. The effect is very good and we can indeed turn flexibly!" The excited body made the car tremble slightly.

“Try it?”

"Well, I just got it out for an interview after assembly, and I also stood up and ran for more than a dozen people. Now I just adjusted the distance between the front and rear wheels to make the carriage more evenly under pressure, and then changed the steering bearing part to steel, which could withstand a larger weight and was not easy to break..." The car manufacturing order carefully introduced the samples of this four-wheeled carriage next to each other.

"It's very good. As long as you can make a flexibly turn, you can get the sample as soon as possible and try running on the road to see the situation. Continue to improve the size, width, length and length of the car body, and then record the data and structural drawings in detail!"

"Don't worry, Marquis! In fact, the reason why the four-wheeled carriage could not be manufactured and used in the past was because of the steering problem. Now, after Marquis solved it with this wonderful idea, everything else is very easy to complete. I will carefully draw the drawings and data and hand it over to you."

The car manufacturing order nodded repeatedly, and after saying that, pointing to the wheel and saying, "Mr. Marquis, we have increased the rear wheel by one foot according to your proposal, and the width and thickness have increased a lot. The spokes and wheel hubs are reinforced with iron bars, which is enough to withstand a weight of tens of thousands of kilograms. After manufacturing, it is no problem to carry more than ten people. It may wear a lot of axles, and it will be bent and deform over time..."

Chen Xu looked at the wheels that were as tall as his chest, and squatted down to see the joint part of the axle and frame, and then frowned slightly.

The structure of Daqin's carriage is different from that of later generations. Its main shaft and wheel are fixed together. When it rotates, the entire axle and two wheels rotate together. The joint point of rotation is between the frame and the axle. Therefore, the wear time between the axle and the carriage will loosen and make a squeaking sound. Moreover, because most carriages use wooden axles, it will not take long to repair and replace the axle, and replace the wood under the frame, otherwise it will break when running one day.

Although the axles and wheels are fixed together, they are not flexible and worn seriously, but there is another advantage on the battlefield. When using a chariot to rush forward, sharp weapons are usually installed at both ends of the axles of the chariot. When the chariot runs, the weapons will rotate together, which can attack the enemies on both sides of the chariot, and at the same time, this weapon can be used to destroy the opponent's chariot and war horses.

Nowadays, with the gradual rise of cavalry, chariots have become less popular. They are too bulky and inflexible, and are slow in speed. In addition to their powerful appearance, they are actually useless and are about to be eliminated from the battlefield.

The civilian version of the carriage does not require the axle to use the aggressiveness of the axle, but requires large load capacity and flexibility.

And the only way to solve this problem is to use bearings.

"Ma Gan~" Chen Xu turned his head and yelled.

"Marty, I'm here!" Ma Gan, who came with him, hurriedly ran over happily.

"How is your bearing built?" Chen Xu asked.

"Uh~" Ma Gan's face turned a little red, she shrank her neck and said dryly, "Mr. Marquis, the bearings we have built recently still have some gaps, but we embedded two pieces of iron on both sides of the collar to block the steel balls, so that the steel balls will not fall out, which is much better than before..."

"Go and pick it up and take a look!"

Ma Gan turned around and ran out of the shed. After less than five minutes, he ran back with sweat on his head, holding a few things in his hand that looked not much different from those of the later generations.

"Haven, look, the two sides are cut into circles with thin iron sheets and embedded between the two rings inside and outside, just blocking the steel balls inside. Although there is still a slight gap, as long as the steel balls don't fall out, they can still rotate flexibly..."

Chen Xu took one of the large bearings with a diameter of nearly ten centimeters and looked through it. He turned it and observed some of them. He found that it was indeed similar to what the hemp rod said. He felt a little swaying when he turned too fast, but the steel ball was blocked by the iron sheet and did not fall out.

Chen Xu played with bearings when he was a child, and he also made a three-wheeled scooter with bearings. He had fun with a group of children on a dirt road downhill in the village all day long. Once he didn't control it and got into a pile of cow dung on the side of the road, and then he cried home with a cow dung. Then his mother chased half of the village with a broom. Even if he traveled through time, the deep memory was not cleaned up by the Time and Space Administration. Every time he saw something like a bearing, it always emerged from his mind like a devil.

The feeling of the head and face of the pile of cow dung was so irritating. It was so sour and refreshing. People who had never experienced it didn’t know that kind of happiness... they were so happy that they wanted to die!

Later, when I went to junior high school, I didn’t know where the scooter was thrown. Now, thinking about it, except for the experience of urging cow dung, everything else seems to be a beautiful childhood memory.

Although Chen Xu has seen bearings since he was a child, he has never known how the steel bulges in the bearings were installed. He once violently disassembled a steel ball bearing and never put them back. Therefore, after traveling through, he could not guide Ma Rod and Gongshusheng to perfectly fit the steel bulges into the ring of just the right size.

What's more, even if Chen Xu knew how to perfectly put steel bulges in, in this era without various precision measurements and manufacturing instruments, no matter the size of the outer ring or the size of the steel ball, it is impossible to achieve perfect gaps, and he does not know the cold and heat expansion properties of metals. Without accurate scientific calculations, he will inevitably not get a perfect ending.

So this is the limitation of the times and has nothing to do with whether Chen Xu knows it or not.

The simplest thing is the manufacturing of steel balls, which are not pressed by machines, but are made by very primitive liquid dropping method. I won’t mention the material of steel, it must be very garbage, which is a huge difference from the materials used to manufacture ball bearings in later generations.

The steel bulges made from a large iron pot seem to be very round and regular, but in fact, if measured with precision instruments, they are basically not round. Even after being polished with a roller, they are only some seemingly smooth spheres, which are not strong enough, are not resistant to wear and easily broken.

In addition, the inner and outer rings cast by casting have grooves, and the parts in contact with the steel balls are also very rough, making it very difficult to polish, and it is slow. To make a pair of collars with completely smooth inner grooves, a craftsman needs to polish for several days.

Therefore, although bearings are successfully made now, they only look similar and seem to be plausible.

It can be used, but not durable, and there will definitely be problems after using it for a period of time.

But in this era of fucking J8 eggs, this is definitely a great innovation that has never been seen before.

At this time, a group of people were surrounded by Chen Xu, constantly looking through and playing with these bearings, and while admiring, they all looked at Chen Xu. I wonder how the little marquis had such incredible innovative skills and invented such incredible things.

Maybe there is an old white-bearded immortal living in the little marquis' head, so you can chop and see.

Although Chen Xu knew that this bearing was probably not durable, no matter what, the bearing was much better than the direct contact between the axle and the frame, and the wear can basically be reduced and negligible. Once the steel bulge is broken, it is enough to change the steel bulge, which is much less than changing the axle, because sometimes, the axle and the wheels have to be replaced together.

Moreover, as Gongshusheng continues to try to smel other types of steel, develop hot cutting equipment and stamping equipment, and create perfect spiral grooves, Chen Xu believes that the roundness and tolerance of both the inner and outer rings and steel balls will be greatly improved. This time may be three or five years, or ten or eight years, and the quality of bearings will continue to improve with the development of the process.

The inner ring hole diameter of the bearing with a diameter of half a foot in hand is the same size as the diameter of the carriage wheel axle under Daqin. This is the largest bearing designed by Chen Xu at the time. The purpose was originally intended to be used on the carriage, but the quality has not met the requirements.

In other words, this bearing can be directly penetrated into the axle of the carriage, and then the wheels can be modified and then put on the bearings.

Seeing Chen Xu squatting in front of the wheel with the bearing, many people were confused, but after a while of confusion, the car manufacturing line suddenly blew a few violently and exclaimed: "Mr. Marquis, are you trying to install this bearing between the wheel and the axle?"

"Of course~" Chen Xu nodded slightly, "You see, the wheels and axles are fixed at the moment. If you want to rotate together, the wear of the axles and frame will be very large. But if you install a bearing, it will be different. The axles will no longer rotate. It is just used as a support. When moving, only the wheels are rotating, and it will become more relaxed and flexible than ten times, and will naturally run faster..."
Chapter completed!