"Master Hou is really a good person."

"We are really smoking from the ancestral tomb, and we actually met a good person like Hou Ye."

“……”

The farmers took their things in the hustle and bustle, and Li Chen stood not far away with his hands in his hands, looking at the bustling farmers.

Some things that are not valuable to Li Chen can make these simple old Qin people grateful to Dade.

The snow outside is getting heavier and heavier. But it couldn't stop the enthusiasm of Li Chen and the others, and the big cow in the craftsman's room was beating with a hammer. A human-powered tricycle appeared in Daqin, and Daqin's transportation industry began to flourish.

The pedal tricycle is divided into two parts, the front has a wheel that can be steered, the handlebar, bell, brake, pedal and saddle, and the chain drives the wheel at the rear to turn. The rear of the tricycle is mainly a carriage, and the body is a wooden rectangle.

With Daqin's current technology to make a tricycle that can be adapted normally, there will still be technical barriers in the strict sense.

For example, tires, chains, axles, these are not perfect for the time being.

The main structures of wheels, handlebars, brakes, pedals, seats, and carriages have been made with the support of the two skillful hands of Da Niu and Liuzi.

The hubs of the wheels are made of fine iron, which were supposed to be inflatable wheels. But considering the road conditions and actual situation in Daqin, under the command of Li Chen, a solid wheel with good elasticity was made of gum and cowhide.

In potholed road conditions like Daqin, solid wheels are more durable, although relatively laborious.

The pedals and carriages are woven little by little from bamboo strips, and they look very artistic.

As for the handlebars and brakes, it didn't take much effort to build, and these couldn't be simpler for the bull.

The biggest technical barrier of the whole pedal tricycle should be the axle, which is composed of some round steel balls between the wheel and the axle.

In the final analysis, the axle is a lever that changes the force and torque, which is completely different from the previous carriage wheels of the entire Daqin. Once the axle is born, the heavy wheels will be extremely labor-saving.

In the workshop, the bull is grinding the steel balls one by one, and the more uniform the steel balls in the axle, the more effortless the tricycle will be when pedaling.

The flames in the furnace reflected on Da Niu's face, making his face red and hot, but he didn't react at all.

"Da Niu, can you do it?" Wang Li asked impatiently.

"Can you do it?" Da Niu asked rhetorically.

"That's what I'm going to do." Wang Li looked like a matter of course.

"No, don't push me." Da Niu was busy and said impatiently.

About Mo Tea Kung Fu

"Can you do it?" Wang Li just held back for a while and asked eagerly. Obviously, this kid's curiosity is very heavy.

"There is nothing in this world that I can't do." Da Niu said confidently.

At this time, Da Niu just finished polishing all the steel balls, and threw the last steel ball into the plate to make a "ding, ding" sound.

"Are you okay with having a baby?" Wang Li asked.

"You can do this, you can't go to the construction site to lift the bar." Da Niu's face was blackened by Wang Li's anger at this time.

"Wang Li, you go out." Li Chen pointed to the door and said.

It's hard to bring the team, there will always be one or two naughty and mischievous stunned greens.

The bearing, the steel ball, and the wheel shell are perfectly combined in the hands of the bull, and it is hard to imagine how this can be called a perfect bearing by hand.

The bearing can be said to be the soul of the pedal tricycle, if there is no bearing, then the long legs are definitely not able to pedal the three wheels.

There are many parts of the pedal tricycle that need axles, and the handles responsible for steering need axles, and the axles of the three wheels are also essential. The power transmission of the chain also requires the support of the bearing.

With the help of a few people, Da Niu assembled the tricycle together, and Daqin's first pedal tricycle was officially born just missing a chain.

The structure of the chain is not too complicated compared to the bearing, it is a chain-like object that is used as a mechanical transmission.

The mortise and tenon structure required by the tricycle chain is the specialty of the bull.

It didn't take long for a silver shiny chain to be hung on the gears of the front and rear of the wheel.

The crowd scrutinized what it called a tricycle, with its triangular steering handlebar, bamboo and wooden body, saddle and pedals. The silver wheels and chains are beautiful when you look closely.

"Click, click."

Li Chen got on the tricycle and pedaled slowly. Although the Da Niu is highly skilled, in the final analysis, it is still not comparable to the machinery of the previous life.

Perhaps because of the difference in the size of the steel balls, every time Li Chen pedaled, the tricycle would make a creaking sound. Although this car is much more difficult to ride than the tricycle in the previous life, it can be the most perfect tricycle under the premise of no lathe and no stamping in Daqin.

"Moved?"

"Rided?"

Everyone looked at the tricycle that Li Chen was riding and exclaimed, there is still such a car in the world that can run without mules and horses.

"Teacher, is this science?" Fusu was amazed, and the tricycle seemed to open the door to a new world for him.

"Yes, that's science."

"Or maybe it's a very small discipline in science, we call it physics, and chemistry should be even more amazing in comparison." Li Chen said.

The continuous goose feather snow made the ground accumulate a finger thick of snow. The group cleared the snow from the yard and took turns riding pedal tricycles to practice.

Perhaps out of curiosity, several people scrambled, you ride for a while, I ride for a while. After a while, even serious people like Fusu joined the scramble.

"Hey, what are you doing?" Ying Yue was dressed in red and walked into the courtyard with long legs.

"The teacher invented a car that doesn't need mules and horses, but only needs two human legs to pedal and walk, and it is not a problem to pull goods and carry people." Fusu said to Yingyue, slowly proud in his words. As if he had made it himself.

"Come on, I'll try." Ying Yue said and walked towards the third wheel.

"Yes, that's it, hard, kick." Li Chen commanded.

I have to say that Yingyue's limbs are indeed very flexible, and she has been riding fast in just a few minutes.

"Come, Li Chen, you sit up." Ying Yue shouted at Li Chen.

Ying Yue pedaled fast, speeding towards the outside of the courtyard, and the snow outside the courtyard did not affect her speed in the slightest.

"Ahh

"Whew, whew, whew."

Li Chen sat in the car and heard a gust of wind in his ears, and his nose was red from the cold. Looking at Yingyue's two fast long legs, Li Chen said in his heart: "It's a pity that this leg doesn't pedal three rounds." ”