Injection joke

The automobile can be said to be the greatest invention of modern times, because it expands people's activity radius and improves travel efficiency. However, due to its high failure rate and high noise, many people think it can't replace the carriage and laugh at it for a few days, but the reality has given these people a slap in the face. Nowadays, cars have become the traffic master in this world. Many inventions in automobile were ridiculed because of immature technology or people's prejudice in early application, but now they are widely used. Let's have a look.

1, plastic bumper I believe many people still mistakenly think that the bumper is made of steel, because only the bumper is strong enough to protect the vehicle! In fact, plastic bumpers have been used since the 1980s. Compared with steel bumper, it has the following three advantages: 1, plastic is more elastic and buffering, which can protect pedestrians' legs; 2, the density of plastic is lower, which plays a role in lightweight; 3. Plastic is injection molded, which has better plasticity and is beneficial to modeling design. At present, plastic bumpers have become very popular, which greatly reduces the injury probability of pedestrians. It can be said that this material change is a great progress of people's civilization!

2. Collapsed energy-absorbing body structure Many people think that the harder the car, the safer it is. This is actually a misunderstanding. In some early car accidents, it can be found that some cars were not damaged, but the people inside were injured. This shows that the harder the car, the safer it is. In the sixties and seventies of last century, the collapsed energy-absorbing body structure began to be used in automobiles. In the event of a collision, although the exterior of the vehicle looked miserable and was laughed at by people at that time, the people inside the vehicle were well protected because the collapsed body absorbed a lot of collision energy and reduced the energy transmitted to the vehicle. The essence of automobile safety is to protect people, and the damage of automobile during collision is not as important as life. Nowadays, cars basically adopt this energy-absorbing body structure design.

3. Pneumatic tires Whether in the carriage era or in the early automobile era, the wheels are all made of wood or steel, and the bumps can be imagined. Later, a layer of rubber was added, which had limited shock absorption effect and slow driving speed. Later, Thomas invented the pneumatic rubber hollow tire. However, due to the limitation of the technical level at that time, the situation of puncture and air leakage often occurred, which was once rejected by peers and users. But with the improvement of pneumatic tire technology, the driving speed and comfort of the car have also been greatly improved! Now it's basically pneumatic tires ~

In addition, seat belts and USB interfaces are also great inventions. Today's electric vehicles and autonomous driving technology are also at the forefront. I believe that the efforts made for technology upgrading will definitely be rewarded in the future!