Liugong Loader Rong Guan Global Deep Plowing Construction Legend

Deep memory

Deep cultivation and construction of legend : 1987-1999

Since the 1980s, with the implementation of the reform and opening-up policy, energy, mining, transportation, and land development have witnessed rapid development in all walks of life. Demand for construction machinery is increasing, and the quality of products is becoming higher and higher. There is a growing demand for product varieties. Domestic construction machinery can no longer meet this growing demand. Each year, the country will spend at least 20 million US dollars to import loaders. In the international market, China's engineering machinery products are difficult to enter the international market because of their low quality and unstable quality. Faced with the call of the domestic market and the challenge of the international market, Liu Gong, who is the “leader” of the Chinese construction machinery industry, urgently needs to study and adopt corresponding countermeasures.

Liugong loader

No Si step, no more than a thousand miles

In 1985, Liugong successfully developed the first round of replacement products - ZL50D wheel loader. At that time, due to Liugong's first completely independent development of replacement products, lack of experience, some of the advanced technology is not yet mature, and a large number of accessories can not match the host, so the production, procurement, sales and product reliability A lot of problems have prevented mass production and mass market introduction. In this case, the production of ZL50D was stopped in the small batch production and sales of 5 units.

It can be said that there are no silicon steps, no more than a thousand miles. Although the ZL50D has stopped production, it has played a significant role in Liugong and even the technical development of the entire loader industry in China. First of all, Liuzhou and even the entire Chinese loader industry had a preliminary understanding of the industrial structure of the world’s advanced loaders. Second, the product used more than 20 advanced technologies at the time, of which more than 10 were developed through ZL50D. The success laid the foundation for the successful development of the second generation replacement product ZL50C. In short, there is no first round ZL50D prelude, it is likely that there will be no later Liugong ZL50C!

In this historical context, Liugong decided in 1987 that based on absorbing a number of advanced technologies that ZL50D has successfully developed, combined with Liugong’s valuable experience in the development, production, and sales of loaders in the last two decades, and the ZL50D loader can also Continued use of mature technology, formally invested in the development of the second generation replacement product ZL50C loader product.

Deep cultivating and building a legend

Deep cultivating, eventually becoming a large device

At the end of 1987, after a year of preparation, design, and research and development, Liugong’s second-generation replacement product, the prototype of the ZL50C wheel loader, was finally successfully prototyped. After debugging and initial testing, it was completed before the Spring Festival in 1988. After the Spring Festival in 1988, the test was put into operation, including the performance test and 1000 KM long-distance running test. Then it was sent to the Beijing test site for a 1000-hour reliability acceleration test, and the test was completed before the National Day holiday. On November 9, 1988, the second generation replacement product of Liugong, the ZL50C wheel loader, passed the provincial and ministerial level expert appraisal in Liuzhou. In this way, the first product after the replacement of the second generation of Liugong, is also the first product of the second generation of the Chinese loader industry after the replacement of the ZL50C, was born in Liugong!

Liugong ZL50C wheel loader has adopted more than 20 new and improved new technologies, most of which come from the advanced technology on the ZL50D. These new advanced technologies include: full-hydraulic flow-magnification steering system, single-rocker reversing “Z”-type linkage mechanism, plate-beam front-rear frame, fully-enclosed shock-absorbing micro-supercharged cab, adjustable decrement Shock-type driver's chair, shock-absorbing box-type structural cover, articulated kingpin bearing structure with joint bearing, new type of loader-dedicated rotating shaft, etc. For the first time, emergency brake systems, air conditioning systems, hydraulic oil radiators, and sealed pin bushings have been added to the loader. The improved new technologies adopted are: The gearboxes with greatly improved efficiency have improved the efficiency of the original ZL50D gearbox II file by more than 7%. The service life of the original ZL50D gearbox was extended, making the gearbox still account for over 60% of all gearboxes in the industry. At the same time, the fuel savings that have been saved over the past decades are incalculable, resulting in incalculable economic and social benefits. The improved drive bridge that significantly improves reliability is the industry’s most recognized drive axle with the highest reliability. In the past, the reliability of the drive axle of the entire Chinese loader industry was the worst among all major components. The Liugong ZL50C drive axle completely changed this passive situation. The technology was later transferred to the entire industry, changing the face of the driver bridge in the Chinese loader industry. The successful adoption of these advanced technologies in the ZL50C has greatly reduced the technological gap between the Chinese loader and the advanced level in the world at that time, and ranks among the advanced technology levels of the world's loaders.

The technical level of the Liugong ZL50C wheel loader has far surpassed that of other companies in the Chinese loader industry. Compared with the world's most advanced Caterpillar loader technology in the world, each has its own merits. Although there are still some gaps in terms of operating efficiency, operating comfort, parts and overall reliability compared with similar caterpillar loaders, the components and overall structure of the Liugong ZL50C wheel loader and Carter It is much simpler than similar machines of the same type, the manufacturing cost is relatively low, and the operation, maintenance, and maintenance are also more convenient. For Chinese customers, the Liugong ZL50C wheel loader can be said to be a very good and cheap product; for the Chinese market, the appearance of the ZL50C almost blocks the foreign loader products outside the country. For decades, for the national brand, the ZL50C has formed a distinct Chinese loader technology standard and gene, and has enabled the national brand represented by Liugong to initially have the strength to compete with international brands. As a result, Liugong ZL50C wheel loader became the first batch of Chinese loader industry's meritorious product to open the international market in large quantities, and made great contributions to the development of Liugong and the Chinese loader industry in the international market.

Cast a 30-year legend

In the history of nearly 30 years, the ZL50C wheel loader has been the most important leading product of Liugong for most of the time, and it has occupied the first place in Liugong and even the industry's single product sales for many years. In Liugong, the ZL50C wheel loader has a maximum annual sales volume of more than 30,000 units, accounting for almost 80% of all product sales. Even the current Liugong ZL50C wheel loader compared with other domestic brands, the most important feature is the ability to work hard and high reliability. For example, during the relocation project of Gaojia Town in Fengshi City in the Three Gorges Project in 1999, most of the new site formation process was weathered rock. In the event that blasting could not be used, only shovels and leveling operations could be performed directly with loaders. At that time, the users who undertook the construction purchased 50 type loaders from other domestic brands. In the three months, the faults occurred. The construction period and construction progress were seriously delayed. The user reported to Fengdu Court and requested to return the machine and refund the full amount. Compensation for economic losses. The court requested the National Engineering Machinery Quality Inspection Center to carry out technical quality appraisal as the technical basis for the court decision. The result of the appraisal is that the reliability of the aircraft is poor, and the manufacturing company must bear the main responsibility, and appropriately compensate the loss of the user, and make a refund. Later, the company leased 2 sets of Liugong ZL50C wheel loaders and successfully completed the tasks they had undertaken. It clearly demonstrated that Liugong's ZL50C wheel loader was able to do heavy work and reliability.

The Liu workers at this stage, encouraged by the pioneers of the previous generation, continued to intensively cultivate, making the second-generation products represented by the Liugong ZL50C wheel loader a qualitative leap in terms of product quality and technology. Honor is also accompanied by strength and performance. In this period, Liugong won the title of National Advanced Enterprise in Quality and Benefits, and ranked among the 500 largest industrial companies in China and 500 enterprises with the best economic benefits, and 50 customer-satisfying companies in the country. , won the 1993 "National Outstanding Golden Horse Award" and other honors. In 1991, Minister of Machinery Industry He Guangyuan inspected Liu Gongshi's inscription: "When a good industry takes the lead, to make new contributions to the development of China's construction machinery." Since then, the glory of the "leader" has always been a halo on top of the Liu workers, encouraging Liu workers Take the wind and waves and take the victory. (This article is from Liugong)