On June 5, Wu Bin, the “most beautiful driverâ€, held a memorial meeting in Hangzhou, Zhejiang Province. In the sadness of sending a person out of a city, tracing the cause of hitting Wu Bin’s metal blocks has also become a public concern.
According to Wuxi Police's briefing, Wu Bin’s heavy metal block weighing 3.5 kilograms has been determined to be the vehicle brake hub debris of the brake parts. At the same time, the police’s latest progress in the investigation of suspect vehicles is that 9 red lights have been identified as “Dongfengâ€. One of the trucks.
Drum brakes have hidden safety problems
A high-speed traffic police interviewed by the reporter said that whether it is a brake pad or a hub, the chance of wear and fly at high speed is very small. However, the use of quality-deficiencies of the three non-products, long-term overload driving, there may be abnormal loss of brake pads or hubs, and accidents.
From the point of view of the iron blocks that have been accidentally taken, this iron block is used on drum brake wheel commercial vehicles, and there are inherent safety hazards.
A professor of the Automobile Institute told the reporter that there are two types of wheel brakes used in cars: drum type and disc type. Drum type wheel brakes are widely used in large and medium-sized vehicles, which is commonly known as the "brake drum."
“From the video disclosed so far, this flying iron comes from a drum wheel brake. Drum wheel brakes are more likely to fall off than wheel-type wheel brakes. The former is a brake shoe riveted to the brake, and the latter is hot pressing at high temperature. Under the conditions, the material and the steel plate are pressed together. If this is ruled out accidentally, it may be that the brake factory does not rivet the spare parts, or it may not be riveted to the small repair shop when the brake block is changed.†An executive from the company’s brakes company Shandong Jin Qilin Group told reporters.
The above-mentioned executives told reporters that drum wheel brakes used in large and medium-sized vehicles in China are currently used because there is no relevant standard in China to force the use of disc brakes. This requires industry associations and relevant departments to issue relevant requirements. At present, some countries in Europe, the United States, and other countries have issued mandatory policies that require commercial vehicle companies to install disc brakes, and only 400,000 yuan or more of large and medium-sized vehicles are installed in China. Wheel brakes.
"A large and medium-sized vehicle of about 150,000 yuan will need to increase the cost of 3,000 yuan if it is changed from a drum brake to a disc brake. Therefore, many commercial vehicle manufacturers and individuals are reluctant to use disc brakes." Executives told reporters.
The supplier system is weak
In addition, the lack of control over supplier systems by commercial vehicle production companies is also the main reason why commercial vehicle safety has been weaker than that of passenger vehicles. Vehicles are assembled from spare parts, and when entire vehicles have no control over spare parts suppliers, Security risks can occur at any time.
"Commercial vehicle companies do not directly control the brake linings and brake plants, but only control and control the first-class assembly suppliers such as axles. They can't control the second- and third-tier suppliers and the quality management system is relatively unrestricted. Many commercial vehicle companies are state-owned enterprises. There are a lot of small brake pads and brake plants in the surrounding area. The technical and management capabilities of these plants are relatively weak, said the aforementioned executives.
The above executives also told reporters, "If you want to control the second and third-tier suppliers, you need to hire a large number of experienced professionals, which will increase the company's operating costs, while the domestic commercial vehicle company production models are mostly 300,000. Below the dollar, the gross profit margin is not high, and in order to cope with the increase in raw material prices, reduce costs, and increase the price competitiveness of products, commercial vehicle companies lack the incentive to arrange more personnel to target more suppliers."
At present, many domestic axle companies are not very regular companies. To reduce costs, Axle Corporation lacks monitoring of downstream suppliers, and the vicious circle of domestic commercial vehicle production and production has thus emerged.
An unwillingly named commercial vehicle expert told the reporter that China has become the world’s largest manufacturer of commercial vehicles by taking up 39% of the global commercial vehicle market, but China’s commercial vehicle manufacturers still need to further improve product quality and performance. At present, China's commercial vehicle products still rely on low-price competition.
1700 Puffs Disposable electronic cigarette
Fancy Tiles Co,. Ltd. , https://www.tilefancy.com