Datang: My apprentice is Li Chengqian

Chapter 219 Leaf Spring Design
Qin Xiedao was considered a car enthusiast in his previous life.

Although he doesn't understand professional car design.

But he is very clear about some basic structures and principles.

Coupled with some skill bonuses from the sign-in system, it only took a day for him to complete the design drawings of a four-wheeled carriage.

Anyway, most of the parts are made of wood, and the structure of the carriage is infinitely simpler than that of later generations of cars.

So after roughly drawing the structure diagram of the carriage, Qin Xiedao began to arrange for the craftsmen in the workshop to do it.

Things like carriages are purely carpentry work, no matter what shape they are designed into, there is no difficulty.

The only thing to pay attention to is the sofa inside, which is a new bright spot created by Qin Xiedao.

The rest is the chassis system.

The current carriages in Chang'an City are all two-wheeled carriages.

It's not that everyone doesn't know that a four-wheeled carriage can sit more comfortably and have more space, but that the steering problem of a four-wheeled carriage has not been solved in this era.

If the four wheels are rigidly connected directly, it must not be up to the task.

In addition, if there is no shock absorption system, the bumps of the four-wheeled carriage must be much more severe than that of the two-wheeled carriage.

So for so many years, carriages have always been two-wheeled.

But these problems were not a problem for Qin Xiedao at all.

In fact, in the West at the same time, there were already four-wheeled carriages.

Many times, a lot of things almost pierce that layer of paper.

"Lang Jun, stacking steel plates of different lengths in this way can make the carriage of the carriage stick to the wheels more stably, but if there is one more thing on each wheel, the cost of the four-wheeled carriage will increase all of a sudden. .”

Mao Laosan was very confused and handed a sample to Qin Xiedao.

As a blacksmith, Mao Laosan is very confident in his craft.

But it is not optimistic about the thing in front of it.

The fine steel of this era is very expensive.

According to Qin Xiedao's plan, the cost of adding fine steel plates to the four wheels will almost catch up with half a two-wheeled carriage.

Normal people would definitely not choose this way.

"These steel plates are not intended to make the car more tightly attached to the wheels.

Instead, the performance of the entire carriage has a qualitative leap.Whether the effect is good or not, you will know when you try it and sit for a while. "

Qin Xiedao didn't bother to explain the shock absorption principle of the leaf spring to Mao Laosan.

For so many years, the craftsmen of the Central Plains Dynasty have been able to easily use steel plates in the production of weapons, but no one has thought that using steel plates can achieve shock absorption.

Although the shock absorption effect of the leaf spring is a little worse than that of the suspension spring, it is obvious that the difficulty of the suspension spring is a bit high for the technical level of this year.

It needs to make a new breakthrough in steel technology before it can be produced more easily.

But leaf springs are different.

It is very simple to superimpose several steel plates of different shapes and sizes to form a successful shock absorption system.

This simple and crude shock absorbing method continued to be used on many trucks even before Qin Xiedao crossed.

"Lang Jun, apart from the leaf spring you arranged to make, the production of that bearing is a little troublesome and relatively difficult.

I am now using bronze to process this cylindrical roller bearing as much as possible according to the requirements specified in your drawings. "

As a well-known blacksmith in Chang'an City, Mao Laosan was naturally paid by the Qin family.

This year, there are so many workshops in the entire Qin Mansion, and the demand for various steel products has reached a new height.

The steel workshop belonging to the Qin family is already under planning.

"This cylindrical roller bearing must ensure the accuracy of each ball roller, and the size cannot be different, otherwise the effect will be greatly reduced."

For Qin Xiedao, cylindrical roller bearings are the second killer feature.

Bearings are no strangers to the craftsmen of Datang.

Hundreds of years ago, the ancestors had already invented it.

However, there has been no progress in the production technology of bearings.

So far, there are no bearings of later generations.

So now Qin Xiedao is ready to push the development of bearings.

As the basic parts in the basic industry, bearings, gears, bolts and nuts are also good.

These things seem very simple and very basic, but they are crucial to the industrial development of a country.

Even to a certain extent, the development level of these basic components represents the real industrial level of a country.

Regrettably, even in later generations, these most basic things and high-end products have always been controlled by international companies, while domestic companies can only produce some low-end products and earn a little hard money.

"Lang Jun, according to your design, after the ball and roller bearing is manufactured, the requirements for lubricating oil are very high. Otherwise, it won't need to be used for a long time, and it will wear out too much, so that the bearing cannot be fully used."

Mao Laosan is a professional blacksmith, and he has a good understanding of the properties of metals.

However, Qin Xiedao obviously has some tricks to solve this problem.

"After the ball roller is made, you can quench it in time, and then put it in a charcoal furnace for a simple carburizing treatment. Then the wear resistance of the cylindrical roller bearing will definitely be significantly improved.

In addition, a lot of whale oil candles and whale oil have been transported from Mingzhou recently. We can use this whale oil as a lubricant for bearings to alleviate the problem of wear and tear. "

For these parts of bearings, the surface treatment of metal is a very important link.

Otherwise, there is no way to solve the problem of short life of these parts.

As for whale oil lubricants, let alone.

In later generations, although whale oil lubricating oil was not widely used, it was a very high-end product.

Now it is used on a four-wheeled carriage to lubricate the bearings, which is definitely overkill.

Even if the current whale oil is relatively primitive without any special treatment, it is enough to meet the basic lubrication needs.

After solving the problems of bearings and leaf springs, the production of four-wheeled carriages basically solved half of the problems.

All that is left is to implement Qin Xiedao's design step by step, and finally verify the effect.

Seeing that all the work was going on step by step, Qin Xiedao was able to escape from the workshop.

But Xie Linmao was not so lucky.

The more workshops, the busier his work.

(End of this chapter)