Seeing Du Zhongxiao, several craftsmen sang a promise together.

Du Zhongxiao waved his hand again and again: "No need to be polite, the work in your hands is important." ”

Several craftsmen continued to bow their heads to make sickles, Tao Qiqi pulled Du Zhongxiao to the side, pointed to the grinding disc pulled by a donkey and said, "After listening to what the officials said, I made this grinding disc out." A donkey can hold a hammer against several people. With this hammer, the sickle made by the two craftsmen there every day is still stronger than that made by the previous ten people, and it is very convenient. ”

Underneath the millstone driven by the donkey, there is also a large wheel with a partition on top of the big wheel, on which the donkey walks on. The edge of the large wheel has huge serrations downward, oblique on one side and straight on the other. When the wheel turns, the diagonal side pushes a lever down, and when it reaches the straight side, it suddenly rises. At the other end of the lever is the forging hammer. When the other end is pressed, the hammer is lifted, and when the other end is raised, the hammer falls by its own weight.

After looking at it for a while, seeing that the operation was stable, Du Zhongxiao said to Tao Seventeen: "What do you think this hammer looks like?" ”

Tao Qiqi scratched his head: "In my opinion, it's like a monk hitting a bell-"

Du Zhongxiao couldn't help laughing when he heard it: "What a bell!" This hammer hits the iron, like a mortar that doesn't look like a rice machine? ”

Tao Qiqi looked at it for a while, suddenly realized, clapped his hands and said: "As soon as the official said, this hammer really looks like a mortar, but it is reversed. ”

This was originally designed according to the mortar, but instead of being stepped on by man, a donkey was used as a power to constantly lift and fall. Of course, there are several effects that can be obtained by changing the position of the lever fulcrum and the height of the teeth. Even if the fulcrum is changed to the rear of the big wheel, it is no longer to press down the lever but to lift it. With various adjustments, it is possible to get a greater impact force when falling, or to get a higher fall frequency.

After watching it for a while, Du Zhongxiao said to Tao Seventeen: "Have you heard that people in Jiangnan have rice at the water's edge and use water wheels, so they don't have to use people to step on them or livestock?" It's like a water mill we use. ”

"I've heard of it, official, do you want to change this hammer to the water's edge and use water to strike iron?"

Du Zhongxiao nodded: "Exactly." Although it is labor-saving to use a donkey, it is expensive to raise a donkey, and the strength of the donkey is also limited, so it cannot create a big thing. If you can put it near the water and use the power of water, you can create anything. ”

Tao Qiqi didn't speak, stared at the forging hammer for a while, and said happily: "What the official said is that if you move this forging hammer to the water's edge and make it larger, I don't know how much strength it has!" If that's the case—ah, wouldn't striking iron be like kneading dough! ”

Du Zhongxiao nodded: "The child can be taught!" That's what I want you to do to make a sledgehammer like that, and use it to make a big thing! ”

When it comes to the Industrial Revolution in Europe, it is often mentioned by the way that before the steam engine was put into practice, they mostly used hydraulic machinery. The two most important types of hydraulic machinery are water spinning machine and hydraulic forging. For engineering students, these are not difficult, they are just structures, and do not involve complex mechanical calculations. Due to the large number of surplus female labor in rural China, the demand for water conservancy textile machinery is not urgent, and Du Zhongxiao's first thought is hydraulic forging machinery. The forging machinery is similar to the principle of the taper mortar that has been used in China for thousands of years, and with a little modification, it becomes a forging hammer. However, the Chinese have countless ingenuity in agricultural tools, but somehow, the same principle is not satisfactory to turn to industry.

Tao Seventeen has been by Du Zhongxiao's side for a long time, and his ears and eyes are full of light. Du Zhongxiao talked about the principle he envisioned, and within a few days, he came out with a forging hammer powered by a craftsman made of this donkey. This hammer is not enough to make large workpieces, but it is enough to make a farm tool sword. Now build another twenty or thirty steel knives, and you will soon be able to make them.

However, what is really useful about this structure is that it can change the power and transform it into a hydraulic forging hammer. If the design is reasonable, it is possible to create large workpieces, to die forge large parts such as gears, and even to cold-forge steel plates. Although Du Zhongxiao is not a weapon determinist militarily, he also knows how shocking it would be on the battlefield in this era if there were thousands of ironclad cavalry shining with cold light.

Thinking of this, Du Zhongxiao secretly felt funny. At this time, no matter what kind of new technology is developed, I unconsciously think of the military aspect. Although he is still far from being in charge, there is always a magic that makes him think in that direction. Perhaps, the military weakness of this dynasty has left too deep an impression on future generations, and it is difficult to think about it.

Now that he was here, Du Zhongxiao took a look at the place where other farm tools were made. The plough is Tao 17 hands-on, Du Zhongxiao pointed out, and the Quyuan plough after the transformation is much shorter than that recorded in the "Book of Lei". Because of the use of curved wheels, the length of the plough can be shortened, and the length is shorter, and it is flexible when turning on the ground, and it can even be operated by one person. Speaking of the turning of the ground, the part that connects the front end of the plough with the ox sleeve on the "Book of Lei" is called the plough plate, which makes Du Zhongxiao very interested. This component is transferred to the car, which is the steering gear.

In previous life online articles, it was often said that the four-wheeled carriage did not appear in ancient China because the steering gear was not invented, and the turning radius was too large. In fact, at least in the Tang Dynasty, because the turning radius was too large, parts similar to steering gears on agricultural tools had been invented. So why didn't a similar invention be used in a car? Du Zhongxiao tried to analyze the advantages and disadvantages of four-wheeled carriages and two-wheeled carriages, and quickly gave up. Really do theoretical analysis, Du Zhongxiao's knowledge of engineering is not enough, where can he find relevant information in this era? For the mechanical analysis of wheels, it is simply not something that middle school students can do, let alone multiple wheels. It can only be roughly estimated with existing experience, such as a person picking up an empty flat shoulder, which is one picking method, and once it is a heavy object, it is another picking method. When a person pushes an empty wheelbarrow, it is a push, and a fully loaded wheelbarrow is another push. The two-wheeled car is gently pulled by the empty car, and the heavy load is carried around the neck with a loop. With more than two wheels, the train with little friction is towed, the wagon on the road is half-draped on the chassis, and the tractor pulled by the train is much less loaded than the large wagon.

After reviewing all kinds of trains, Du Zhongxiao could only come to one conclusion, the four-wheeled carriage was used to pull people and a small amount of goods, and had the advantage of a smooth ride and fast speed. However, China has been short of horses since ancient times, and the most seats in the Central Plains are ox carts, which are not suitable at all. If you want speed, ride a horse directly, and be steady, then take a sedan chair carried by manpower. "Serve the ox and ride the horse, lead the weight to the far, and benefit the world." The ancients had their own arrangements for these kinds of livestock, and it was not a matter of one or two parts that were not invented. If you want to ride in a carriage, you have to wait until there are so many horses that there is a demand for them.

The plough is the most important agricultural tool, not only used to plough the field, but also used together with ridge farming to carry out various operations such as cultivating and weeding, which greatly liberates manpower. Only by giving full play to the role of the plough can a household of 50 acres of land be able to cultivate well. This is the most important agricultural tool of Du Zhongxiao, and a large amount of funds have been used on this this year, and next spring, a large number of plows will be credited to farmers in the form of mutual insurance.

There is no big difference between the hoe and the hoe and the shape that Du Zhongxiao saw in his previous life, and Du Zhongxiao can't understand the use of various shapes, so he can only slowly improve it according to the situation of farmers. The difference is that the hoes and shovels made by Du Zhongxiao here are made of steel, although they are not tool steel smelted in crucibles, and ordinary steel filling is also rare for farmers. Coupled with careful quenching, it is already a rare boutique around.

Although the twenty steel knives are sold for a lot of money, the changes brought to the place cannot be compared with the agricultural tools here. By the time next year, when these farming tools are in the hands of farmers who are farming, the surroundings of Yongcheng will inevitably change.