Entering the hall opposite, Du Zhongxiao pointed to the picture on the wall next to him and said, "Mr., this is the frame we make here. What parts do a car need and which places are the most important, and everything is clear."

The picture is an axonometric picture drawn by Du Zhongxiao himself. It is not detailed, but it allows workers to understand the structure of the car. In the words of later generations, the most important product here is actually the chassis of the car, and the car box on it is made very rough.

From the painting on the wall, Zheng Jian roughly saw the structure of the cart. In fact, it was a long shaft, two wheels, and the shaft was embedded on the car box.

Zheng Jian was not very interested in these specific technical details. Seeing that the craftsmen inside were busy, he walked in.

In front of him was a hydraulic forging hammer that stretched in from outside. Zheng Jian pointed at Du Zhongxiao and said, "This iron forging hammer is very useful. Since the Tao Shiqi arrived in Xiangzhou, he has made many pieces, which are very effective. A few days ago, he wrote and painted pictures and sent them to various channels to make them accordingly."

After becoming an official in Xiangzhou, Tao Shiqi was different from before. Many of the things Du Zhongxiao learned here were used by him in practice. The hydraulic forging hammer was the most obvious effect. The court specially drew pictures and tricked them into booklets and distributed them to various ways. However, there are some places that were really used, which are still questionable.

Seeing something familiar, Zheng Jian came forward and took a closer look. On one side, a craftsman burned the steel bars as thick as chopsticks and cut them off after burning them red. A craftsman picked them up in time and put them in the trunk of a disc-like mold. He put them all over, put them under the forging hammer, and the forging hammer fell down, pressing the short steel bars inside into small cylinders. He picked up the mold and shook it aside.

Zheng Jian is a person who doesn't like to talk. He can't understand and does not ask Du Zhongxiao, but just keep watching.

Behind, there are craftsmen riding a horse. There is a small platform in front, and they are placed on it, clamping it on both sides. With both legs, the short columns are clamped on the platform to facilitate rapid rotation. There is a steel tip next to it, which makes the cylinders extremely smooth.

After cutting, there is a quenching place behind, so quench these small cylinders. The next one is the same as before, clamping the small cylinders again, but this time, it does not use a steel tip, but uses a fine sand cloth to polish the cylinders smoothly.

Zheng Jian was very interested in seeing it, and he kept seeing that these small cylinders were installed one by one into a copper frame with holes and into a steel ring.

Finally, looking at a round cup-packing parts, Zheng Jian asked Du Zhongxiao: "Zhijun, what is this? Where is it used? It seems so troublesome to do, and I think it's expensive."

Du Zhongxiao said: "My husband said it well, this item is indeed expensive. The car we sell is worthy of these small things. This item is a bearing, also known as axle receiver. It is installed at both ends of the axle, and the wheels rotate rapidly without any effort."

This is the simplest cylindrical bearing. In this era, the accuracy is not good, so I have to be made thick and heavy, and the principle is the same. There is no difficulty in technology. The key is to use good steel, otherwise it is better to use wooden shafts and cast iron shaft sleeves. A large cart with this kind of bearing can pull hundreds or more kilograms of goods, otherwise a horse can pull nowhere. The large carts produced by volcanic military are now mostly pulled by one horse, and about kilograms of them are about kilograms on good roads. The largest one is three sets of carts, with a horse driving shaft in the middle and a horse on both sides dragging it, which can pull two or three thousand kilograms. Such a cart cannot move without bearings. With bearings, the cart will be durable, otherwise the axle will be broken in the future.

The load of a car is closely related to the bearing. Without rolling bearings, the support point of the shaft is deformed by the car and it is extremely difficult to pull. The car needs to use multiple wheels to share the load, which is related to this. If the bearing technology passes, of course, the fewer wheels, the better, reducing the parasitic power consumption between each shaft and wheel. The key to the three sets of carriages in northern China was rubber wheels, bearings, and three ordinary horses could carry several tons of loads. There is no way to imagine rubber wheels in this era, and they can only use the bearings. One cart will be more impressive if it is used to absorb the shock.

Only with such a big cart can you have the motivation to build a road, otherwise it will be worthwhile to build a road spacious and straight. Just walk on a trolley, just a small road, and it is easier for people to carry them on their backs and animals to carry them. As long as you can walk, it is enough.

Du Zhongxiao also learned a practical lesson and worked hard on the bearings. The big trucks I made at the beginning were made of wooden shafts with cast iron sleeves. After lubrication, it was okay to load lightly. Once heavy loading was heavy, it was very difficult to pull the horse, and the wooden shaft was quickly worn out. When it was replaced with iron shafts, the price was increased, but the lubrication effect was much worse. The shaft heads were all immersed in oil and were damaged very frequently.

Zheng Jian nodded, although he didn't understand very much, he didn't ask, and continued to look.

The axle is made from the rear, and the iron is used. It also takes a turning procedure, and the two ends are smooth.

In the end, the bearings made in front were smashed into the grooves left by the wheels, and the two wheels were installed at both ends of the axle, and the chassis of a large truck was made. This is the most critical part of the large truck. As for the carton, it was the work of the carpenter. The truck was not particular, and it was made directly using mixed wood.

Zheng Jian watched the craftsman push the installed chassis out of the hall and ran fast, nodding and said, "This car looks good, and the wheels are very light. Zhijun, how much cargo can a car like this pull?"

Du Zhongxiao said: "When I go back to you, the slow horse that is usually not worthy of riding can be pulled from 800 to 1,000 kilograms. If you use a good mule, you can pull from 1,500 kilograms, which is far better than a ox cart. With this cart, the cargo will cost less than a volcanic army to the Baode army."

Zheng Jian was surprised: "How can you pull so much? If you travel dozens of miles a day, your horse will be ruined."

Du Zhongxiao bowed: "The cart that loads this wheel will not be like this. Generally, it can be taken to take thirty miles a day and can travel 60 miles a day. After resting for a night, the horse will recover as before. Of course, if you use a mule, it will be better."

Mules drive shafts and horses to pull a trap. Mules are gentler than horses. Among the three sets of carriages, using mules in the middle can save a lot of effort. In the era when cars were not popular, these horse-drawn trucks were once very common in northern China and supported a huge logistics system.

Zheng Jian nodded and was skeptical. There were two things Du Zhongxiao said that he was paying attention to, one was to be able to pull a thousand pounds, and the other was not to use a good horse. Nowadays, the transportation of food and grass on Hedong Road is mostly carried by people on horseback, which is so expensive. One person pulls a thousand pounds on one horse, and travels 60 miles a day. The cost of transporting food and grass on Linfu Road was suddenly reduced. Moreover, this car does not need to use a good horse. There are many horses on Hedong Road, so it is easy to buy.

In the era without cars, carriages were once the most important long-distance transport tool in northern China, comparable to ships in the south. Localized mules and horses are resistant to rough feeding. The coachman can travel hundreds of miles as long as he brings some fine materials and feeds hay along the way, which is extremely convenient. If there is a road, it would be even more amazing to use rubber wheels. A carriage can carry thousands of kilograms in this era. There is no way to rubber wheels, but the earthen roads are still OK.

Zheng Jian kept this number in mind, thinking about how to use it to promote the experience of the Volcano Army, so that more large vehicles can be built in Hedong Road and roads can be built widely. As for the most valuable and factory-based production methods in this workshop, Zheng Jian directly ignored it.

In fact, in Du Zhongxiao's eyes, the value of the bearing manufacturing process is greater than that of the carriage. This is the simplest factory, with a single product and a simple process. If all auxiliary systems, such as design, management, production, etc. can be fully equipped, a standardized factory will be established.
Chapter completed!