What is the piece of iron that hit Wu Bin, and where did the piece of iron that hit Wu Bin come from

Buck pad parts that have come off.

On the highway, the driver, Wu Bin, was hit by a block of iron, and after enduring severe pain and completing a complete series of safe parking measures, he finally collapsed in his seat.

When we all praised Wu Bin's deeds of saving people, at the same time, everyone had a question, that is, where did the big iron come from on the highway? Why did a piece of iron suddenly fly over?

There was a lot of speculation yesterday, and today the official results are out.

At present, the preliminary conclusion is that the metal sheet of the flying attack is a brake hub, and it may be caused by the use of inferior products, which are damaged after long-term fatigue use.

This piece of metal weighs in pounds and has an irregular shape.

**More than 20 vehicles have been initially locked.

The piece of iron that hit Wu Bin came from? Relevant departments are requested to investigate quickly and respond in a timely manner.

90km/s？！Faster than a rocket! The speed of the rocket is only about 10km s, and the speed of the vehicle is 90m s.

f=mv't, to make an estimate of the deceleration effect of the windshield v-v', and then estimate the impact time t to calculate.

For example, if there is still half of the velocity left after breaking through the glass 45m s, and the mass of the iron sheet is set to 4 catties, that is, 2kg, then the momentum is still 45 2 = 90 kgm s, assuming that the short time experienced by the driver is greater than the reaction time of ordinary people, then from the moment the iron piece breaks through the glass, it is common sense to understand that the driver still has not reacted, so assuming that the impact time is 1 10), then f = 9kn

It is preliminarily estimated that the iron piece is the brake drum fragment of the rear wheel of the red Dongfeng Tianlong driving opposite Wu Bin in the picture at that time, weighing kilograms.

The speed of buses on the highway is 80kmh-100kmh. The speed of Wu Bin at that time was 94km h, and the speed of the large truck on the highway should not be less than 60km h, assuming that the red truck was running at the lowest speed, the running speed of the iron block was the sum of the speed of the two cars, which was greater than or equal to 154km h, then the force that Wu Bin was subjected to at that time was equivalent to a stationary person colliding head-on with a truck running at a speed of 154km h.

Wu Bin went all the way.

I guess it's about 200 kilograms! The point is that it's too fast!

The impact force is similar to that of a meteorite.

Comrade Wu Bin was awarded the honorary title of 'China's Outstanding Young Guard'.

Because of the pressure, I flew out by myself.

The most beautiful driver may have been hit by a brake drum fragment.

This is the brake drum, which is fixed inside the tire. Reporter Chen Jian.

What the hell is a piece of metal that suddenly flew from the front?

Yesterday, Jin Baizheng, deputy chief engineer of Hangzhou Changyun Group, talked about his views. Kim Pak Zheng is 55 years old and has been responsible for automobile accidents and maintenance for more than 20 years. "Eight years ago, I watched Wu Bin enter the company's ......Yesterday, when I heard that Wu Bin was not rescued, I felt very uncomfortable, and I didn't have time to see his ......In the past two days, I have been collecting information and organizing people to investigate the cause of this accident.

I want to wait for the reason to be clear, and then take a colleague from the maintenance department to send him ......”

Jin Baizheng said that the bus driven by Wu Bin was Jinhua Youth Neoplan, model JMP6125-A, 12 meters long, 35 seats.

After calling up the GPS positioning system of the bus, they found that at the time of the incident, the bus was traveling at a speed of 94 kilometers per hour and was running smoothly. The double-laminated windshield of the front window of Neoplan consists of tempered glass on both sides and adhesive glue and is approximately 9 mm thick. In line with the national standard, it can ensure that the kilogram of iron ball is smashed from a height of 4 meters and will not be broken.

What the colleagues in the maintenance department want to know most is what broke through the windshield and hit Wu Bin's abdomen violently, causing Wu Bin's liver to rupture? Why is there so much power?

The wounding iron piece is about 30 centimeters long, 15 centimeters wide and 1 centimeter thick, and is an irregular ring-shaped fragment weighing about kilograms. Wu Gang, an eyewitness at the scene of the incident and Wu Bin's colleague, said, "I know this kind of debris, which should have flown out of the broken brake drum on the opposite vehicle!" ”

The brake drum is generally installed on the rear wheel of the vehicle, fixed in the tire, and rotates at the same speed as the tire. The brake drum is equipped with brake pads, which suppress the rotation of the tire by the friction generated by contact.

Wu Gang said: "The front of the iron sheet is smooth, and there are obvious brake wear marks on the back. Anyone who has driven a truck will immediately recognize it as a brake drum. I watched the surveillance footage and highly suspected that the debris had bounced off the rear wheel of the truck passing in the opposite lane......”

Jin Baizheng, deputy chief engineer of Hangzhou Changyun Group, also agreed with Wu Gang's judgment, "The maintenance department is often in contact with similar brake drums falling off and flying out to hurt people. ”