Chapter 52: 2 engineering dogs

　　 "Xiao Xuan, can you lend this scooter to my brother to have a look."
　　 A few people had just sat on the stone bench in the west courtyard, and before they were chatting for a while, Yan Shaoning couldn't hold back the monkey anxiously.
　　 This Yan Shaoning seemed to be impatient, Li Zexuan was a little funny, and said, "No problem, Shaoning brother, if you want to see it, don't hesitate to watch it."
　　 Yan Shaoning heard the words and quickly brought the scooter directly to the stone table, and then leaned in to observe carefully. I saw him turning the scooter up and down from time to time, and he kept sighing. In less than a quarter of an hour, Yan Shaoning thoroughly studied all the structures of the scooter. He put down the scooter and looked towards Li Zexuan said:
　　 "Xiao Xuan, although the structure of this scooter is simple, the idea is really surprising. Why didn't I think of such a simple and convenient thing before? Brother, I really can't figure it out."
　　 Yan Shaoning hammered his head in annoyance.
Li Zexuan smiled and said: "Brother Shaoning don't need to be upset. Actually, if you think about it carefully, the structure of many things used in our lives is generally not complicated. For example, the structure of a carriage is also very simple, but why didn't it exist hundreds of years ago? Does anyone want to make a carriage?
　　, in the final analysis, is a problem of one's creative thinking. My master once told me that there is nothing impossible to think of but nothing impossible. Because sometimes creativity is far more valuable than technology. If your thinking is not broad, you will never be able to create valuable new things. "
Yan Shaoning smiled like a divine enlightenment, stroking his palms, and said, "Yes, yes, that's what it means. My brother has encountered many similar problems before. It is obviously very simple, but I just can't think of it. Xiaoxuan, you said this. The idea is up."
　　 Li Chengqian also nodded thoughtfully.
　　 Li Zexuan said modestly: "It's just that Shaoning's brother is a fan of the authorities. Many times, if you jump out of the game and change your mind, you can often get unexpected results."
Yan Shaoning nodded in agreement, looked at the scooter, and said: "But Xiaoxuan, your scooter has many imperfections. For example, the wheels are probably very jerky when turning, and the handle on the front end of yours. , It can only be used as an armrest and cannot control the steering of the scooter."
　　 Li Zexuan nodded, and secretly said that this buddy was born in an engineering family, he really understands the mechanical structure, and he can see the defects of this simple scooter at a glance.
　　 "Well, what Brother Shaoning said is that when he made this scooter, it was just for coaxing the little girl's random actions. This scooter can indeed continue to be improved."
　　 "Oh? So Xiaoxuan, you already have an improvement plan?" Yan Shaoning was very curious when he heard that. He could see the problems with the scooter, but it didn't mean he had a solution to the problem now.
　　 "Little brother does have some ideas. Xiao Xi, you go to the kitchen and bring me an unburned stick." Li Zexuan told Xiao Xi.
　　 He can barely write with a brush, but drawing pictures is really hard for him. The lines of engineering drawing need to be horizontal and vertical, and the soft tip of the brush is difficult to achieve, at least he can't.
　　Xiao Xi led the way. Li Zexuan saw that both Yan Shaoning and Li Chengqian were puzzled, so he explained with a smile: "The younger brother is more used to drawing pictures with charcoal, and I want to draw a drawing for brother Shaoning, so that it will be more clear."
　　 The two nodded.
　　 After a while, Xiao Xi came over with a burnt stick. After Li Zexuan took it, he drew out the long sword and brushed a few swords. Everyone felt that there was a flower in front of them, and they saw that Li Zexuan had an extra slender wooden stick in his hand, and the bottom was still pointed.
　　 It is also the first time that Li Zexuan has "sharpened a pencil" with her sword. After seeing that the result is not bad, he can't help but sigh in his heart that he has become more proficient in power control.
　　 "Good swordsmanship, I didn't expect Xiaoxuan to be good at swordsmanship." Yan Shaoning exclaimed.
The people of Tang Dynasty admired martial arts and the children of high-ranking officials and nobles loved the saber. Although Yan Shaoning had poor swordsmanship, he still had vision. He did not expect that this new friend not only had unique ideas in equipment, but also looked quite good in swordsmanship. Yan Shaoning now I became more and more interested in Li Zexuan.
　　 Li Zexuan didn't answer the call, he spread a piece of rice paper on the stone table and started drawing.
　　Previous life Li Zexuan is very proficient in mechanical drawing. Whether it is computer drawing or manual drawing, the drawings he draws basically do not need to be modified by the teacher, and can be sent directly to the factory for processing.
　　 In his previous university, Li Zexuan’s college organized an internship at the FAW headquarters. Their task was to go to the workshop, draw down the key parts of the car that they had seen in the workshop, and calibrated the dimensions.
　　 At that time, due to the very limited drawing conditions in the workshop, even the ruler could not be used. As a result, many students painted crookedly like a dog's planing, but Li Zexuan painted like works of art.
　　It's not because he has attended art interest classes, but Li Zexuan has been very good at copying since he was a child. When he was a child, he could face the New Year paintings on the wall and completely paint the flying dragons on them, and the paintings were only wonderful and pretty.
　　 After going to university, Li Zexuan sometimes couldn't help but regret that he didn't go to the art academy. I have to say that Li Zexuan is an engineering dog with artistic cells.
　　 At this moment, Li Zexuan was in front of the rice paper, closing his eyes, thinking about the structure of the ball bearing. Amazingly, Li Zexuan quickly formed a three-dimensional structure model of the ball bearing in his mind. This strange scene scared him almost to exclaim.
　　 opened his eyes and saw that several people were waiting for him to pick up the pen, Li Zexuan ignored the reason for the three-dimensional image in his mind, and just just picked up the pen.
At this moment, it’s really moving and flowing. If there is anything in the writing, Li Zexuan feels very strange at this moment, as if his brain is a computer, and his hand is a printer, and the three-dimensional images in the brain are directly reproduced by his hands. On the rice paper ~EbookFREE.me~ Soon, Li Zexuan painted the three views and isometric views of the ball bearing on the rice paper. Of course, he did not indicate the dimensions and tolerances. He is only explaining the principle of the ball bearing. Need these. Li Zexuan put down the pen and let out a sigh of relief.
　　 Yan Shaoning couldn't wait to come up, wanting to see what Li Zexuan was painting.
　　 I saw four different pictures painted on the rice paper. The lines are horizontal and vertical, with real and virtual. This is the first time Yan Shaoning has seen this kind of painting. But why did he draw four pictures? Are they four parts?
　　 Yan Shaoning looked at Li Zexuan with a dazed expression.
　　 Li Zexuan looked at him inexplicably, and wondered: "What's the matter, brother Shaoning? Is something wrong?"
　　 Yan Shaoning pointed to the rice paper, and asked embarrassedly: "Xiao Xuan, why do you draw four pictures? What does this mean?"
　　 Li Zexuan was stunned, didn’t ancient craftsmen draw drawings like this? Don't they know the three views?
　　 "Uh, brother Shaoning, it's the first time that the kid drew a mechanical drawing. Maybe the drawing method is different from yours. I wonder how Shaoning brother drew before?"
　　 Yan Shaoning suddenly said, "Oh, it turns out that this is the case, just because there are some drawings on my brother's body, Xiaoxuan will show you."
　　 After talking, he took out a roll of drawings from his cuff.
　　 Li Zexuan took the drawing and opened it. Sure enough, the ancient craftsmen hadn't started to use the three-view method of drawing. They only drew the plan, and the parts that the plan couldn't express were directly marked with text. Li Zexuan couldn't help having a headache looking at the dense small print on the drawing. This is too inconvenient.
　　 No, I have to popularize modern engineering drawing methods for Yan Shaoning, otherwise it will be too troublesome to communicate later, Li Zexuan secretly said.
　　……