, the fastest update to the latest chapter!

When Jiang Xuan left the Shangui tribe, Shanjia still hadn't considered whether to accept the help of the Vine tribe.

Although the tribal people have little knowledge, they are not stupid. They know that the more attractive the conditions, the greater the price to pay.

What's more, the Mountain Turtle Tribe is cautious by nature, and they don't even believe that the Vine Tribe will help them for free.

They prefer equivalent exchanges and feel more secure in their hearts.

Jiang Xuan did not insist, he believed that one day the Mountain Turtle Tribe would understand that only by following in the footsteps of the Vine Tribe could they become stronger.

After dinner, Jiang Xuan returned to the tribe with a large number of magical mushrooms that he had obtained from the trade.

At the end of April, the warm and humid spring passed quietly, and the hot and rainy summer arrived.

"Huhuhu..."

At noon on April 30, the sky was suddenly covered with dark clouds, and the wind was so strong that the treetops were bent down. The branches and leaves rubbed against each other in the strong wind, making a "rustling" sound.

"Boom..."

After a while, the dark clouds became thicker and thicker, and there was a muffled sound of thunder in the dark clouds, and snake-shaped lightning flashed in the dark clouds.

"Crash..."

In an instant, the pouring rain came from far to near, like a waterfall, washing the ground recklessly.

It was raining heavily outside the house, but Jiang Xuan in the house was not affected much, because the roof tiles had just been repaired not long ago, so there is no need to worry about water leakage.

He was sitting at the table, intently pinching a model out of clay.

He was pinching a wheelbarrow.

In fact, the stability of a two-wheeled or three-wheeled vehicle is higher, but the requirements for the condition of the road surface are also higher.

In the virgin forest near the Veng tribe, it is obviously a huge project to open up a smooth road, which consumes countless manpower and material resources. In terms of the current productivity of the Veng tribe, it is simply unaffordable.

A wheelbarrow is different.

A wheelbarrow is a very light means of transport, it can adapt to various complex and difficult terrains, and is very suitable for the place where the vine tribes live.

Jiang Xuan squeezed the frame first. The frame has two long handles, and there are two support frames below the handle connected to the body.

Finally, he pinched another wheel and glued it under the body.

The construction of the wheelbarrow is very simple. Jiang Xuan quickly pinched it and placed it on the table.

The wheel of the unicycle and the two supporting frames are triangular, which firmly supports the whole vehicle so that it will not roll over.

"The most troublesome thing about making a unicycle is the wheel and the bearing. The wheel can always be made by a woodworker with a little effort, but this bearing is more troublesome."

Jiang Xuan frowned. The common ball bearing in the previous life could not be manufactured with the existing industrial technology, because it was too precise.

It is a bit difficult for the tribal people to manufacture high-precision ball bearings.

But there is no bearing, only one axle is not enough, the hole in the center of the wheel will become bigger and bigger, the axle will be finer and finer, a wheelbarrow will be scrapped quickly, and the person who pushes it will be very laborious.

"What kind of bearings are there that the current rattan tribe can manufacture and are durable?"

Jiang Xuan first thought of the sleeve bearing with the simplest manufacturing method.

The so-called bush bearing is actually a wide metal ring on the axle, and a metal ring on the center hole of the axle, and adding lubricating grease to it can reduce the problem of excessive wear between the wood.

Of course, this kind of bush bearing is essentially two metal rings that hurt each other. Even if lubricating grease is added, the fate of being worn out cannot be avoided.

Moreover, there is currently no metal with high hardness, high toughness, and wear resistance in the rattan tribe.

Whether it is bronze or gold, the service life of the manufactured bushing bearing is not very ideal.

The most ideal material for bushing bearings is steel, because it has high hardness, stronger toughness than bronze, and better wear resistance.

However, it is not easy to smelt high-quality steel. With the current smelting process of the Fuji tribe, they can only smelt unusable low-quality iron.

Therefore, Jiang Xuan rejected the plan to manufacture bushing bearings. This thing is laborious to push, not durable, and has poor load-bearing capacity.

Provide you with the fastest update of "This Is My Primitive Tribe" by the great **** Yun Qingshi!

Chapter 271 Wheelbarrow free reading: https://,!

, update the latest chapter as soon as possible!

powerful.

Jiang Xuan continued to ponder, and kneaded some ball bearing parts with clay, staring at those parts, trying to find a replacement.

Jiang Xuan has a bad habit, that is, when he is thinking, his hand will always play with some small things unconsciously.

Sometimes it was a small dead branch, which was broken into many small pieces by him.

Sometimes it is a small pebble, which is constantly played by him.

Today, he only had clay on hand, so he squeezed a small piece of clay and kept twisting it.

He thought hard but didn't think of an alternative, and could only bow his head in distress.

At this time, the small piece of clay had been twisted into strips by him, very round.

He stared at the clay that had turned into strips for a while, and a flash of inspiration suddenly occurred to him, and he thought of a way to replace the **** in the bearing.

That is to use cylindrical rollers instead of balls.

First of all, it is much easier to manufacture a cylinder than a ball, and it has a large force-bearing area and requires less hardness of the manufacturing material.

Jiang Xuan vaguely felt that he seemed to have seen this kind of bearing somewhere in his previous life, but the impression was too shallow, and he was not sure.

Jiang Xuan immediately twisted some cylindrical rollers with clay, then squeezed the inner sleeve and outer sleeve of the bearing, and put the cylindrical roller into the gap between the two sleeves.

Although the workmanship is very rough and the material is wrong, Jiang Xuan immediately determined the feasibility of this thing after seeing the model of the cylindrical bearing.

The only thing to note is that a cover plate needs to be added on both sides of the cylindrical bearing to prevent the cylindrical rollers from falling out.

However, it is not enough to have a model. It is necessary to manufacture a real cylindrical bearing to know whether this thing can be used or not.

Jiang Xuan carefully brought the unicycle model and cylindrical bearing model made of clay and went to the wood workshop and smelting workshop.

By this time, the rain had stopped, the dark clouds had cleared, the sky had cleared up again, and the forest was filled with a grassy aroma and rich water vapor.

He first came to the wood workshop, gave the model of the wheelbarrow to the owner Huai, and told him the manufacturing method of wooden wheels.

The main body of the unicycle is not difficult to manufacture, but it only needs to use more tenon-and-mortise structures.

Since the rattan tribe has bronze tools, it is not difficult to manufacture wooden wares with tenon and mortise structure, and they have accumulated a lot of experience.

The manufacture of the wheel is a little more troublesome, but the Teng tribe now has a tool such as a ruler, and Jiang Xuan taught them to draw a circle by connecting two points, as long as it takes some effort, the wheel can always be made.

After Jiang Xuan explained the manufacturing method and precautions of the unicycle, he seriously said to Huai Huai:

"The wheelbarrow is very important to our Vine tribe. You can think of it as a livestock that doesn't need to graze, drink, or rest."

"With a wheelbarrow, it will be more convenient for our Fuji tribe to transport things in the future, and the clansmen will not have to work so hard."

Huai nodded heavily: "Don't worry, boss, even if I don't eat or sleep, I have to make a wheelbarrow!"

"it is good!"

Jiang Xuan patted Huai on the shoulder: "I believe in your ability, work hard, the tribe will not treat you badly."

Huai got the approval of the leader, and he was even more excited. Without saying a word, he immediately picked up the tools, picked wood and started to manufacture the main part of the wheelbarrow.

Jiang Xuan stood aside and watched for a while, but found no problems, so he quietly left and went to the smelting workshop.

After arriving at the smelting workshop, Jiang Xuan pointed to the parts made of clay and explained the manufacturing method and function of cylindrical bearings in detail to the workers who were good at casting bronze ware.

Cylindrical bearings are actually not complicated. The only thing that determines the upper limit of its performance is the material and accuracy.

After the workers listened carefully to Jiang Xuan's explanation, they immediately started to manufacture Tao Fan, preparing to pour the parts of the cylindrical bearing.

That night, the first set of cylindrical bearing parts was born in the smelting workshop.

However, when assembling, Jiang Xuan discovered that the inner ring of the bearing and the outer casing did not match very well, and the cylindrical bronze rollers were not very consistent in size.

The end result is what they spent most of the day making

Provide you with the fastest update of "This Is My Primitive Tribe" by the great **** Yun Qingshi!

Chapter 271 Wheelbarrow free reading: https://,!

, update the latest chapter as soon as possible!

It can't be used, it just has the appearance of a cylindrical bearing.

Jiang Xuan encouraged: "It doesn't matter, continue to work hard tomorrow, I believe you will succeed."

The soldiers of the smelting workshop were not very emotional. They greatly underestimated the difficulty of making this thing.

However, the tribesmen will not give up easily, not to mention the support and encouragement of the leader.

The second day, the third day... For the next half month, the soldiers of the smelting workshop were constantly trying to make usable cylindrical bearings.

On May 10, the main body and wheels of the unicycle were first manufactured by the wood workshop.

On May 18, the core component of the unicycle, the cylindrical bearing, was finally successfully manufactured by the soldiers of the smelting workshop. Each cylindrical roller was hand-polished and calibrated to ensure the same size of the rollers.

On May 19th, the first unicycle of the Veng tribe was born under Jiang Xuan's own hands!

"Finally successful!"

Jiang Xuan checked the unicycle one last time and found no problems, so he put something on the unicycle and pushed it out the door.

Provide you with the fastest update of "This Is My Primitive Tribe" by the great **** Yun Qingshi!

Chapter 271 Wheelbarrow free reading: https://,!