As the saying goes, "Every country has its own advantages and disadvantages in various fields.". When it comes to neighboring Japan, you may think of its strong automobile manufacturing industry and beautiful natural scenery. But what you may not know is that Japan also holds a pivotal position in the world in terms of technological strength! In today's convenient transportation, China has established the world's largest high-speed rail network and technology platform, which to some extent represents a direction for the future development of high-speed rail. However, China's seemingly powerful high-speed rail used to import a nut from a small Japanese company. Why?

The loosening principle of fasteners is generally caused by the movement gap between bolts and nuts. If the gap is filled, the ideal stable state is achieved. For this reason, Japan began research on nut loosening and in 1974 developed a component called "the world's harder locking nut", which rose to fame. In terms of composition, the hard locking nut consists of a female nut and a male nut. Firstly, combining the female nut and the male nut can reduce the gap between the two nuts. Secondly, using the principle of wedge tightening, the nut is locked by the strong force generated on the bolt shaft. The combination of bolts and nuts generates a strong force based on the wedge shape of the nut, thereby achieving the goal of stabilizing the parts. From the subsequent use effect, the use effect of hard lock nuts is better than any type of nut in the world. Therefore, after the birth of this hard locking nut, it was greatly welcomed by European and American countries. So far, hard locking nuts have been widely used in the manufacturing of telephones and radars. The use of nuts greatly improves the safety and firmness of equipment circuits, further reducing maintenance costs. It is worth noting that for some high maintenance cost and difficult infrastructure, such as bridges, iron towers, railways, etc., hard locking nuts also have strong adaptability and practicality, and are widely used even in high-speed trains and other transportation vehicles. It has been safely used for over 30 years and has won widespread praise and trust from customers around the world.

When it comes to the principle of hard locking nuts, it is actually very simple. Nuts are locked using the wedge principle. Insert a wedge between the nut and bolt to ensure stability. However, it may seem easy in theory, but it is almost difficult to reach it manually because a wedge needs to be inserted between each nut and bolt. So far, hard locking nuts can be found in many aspects such as railways, bridges, and machinery in Japan. This small nut has also greatly promoted the development of Japan's basic industry.

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East of Dongmingyang Village,Linmingguan Town,Yongnian District,Handan City,Hebei Province