Shanzhong Machinery Co., Ltd. was established in March 20 10, and is a wholly-owned subsidiary of Shandong Heavy Industry Group. The company focuses on the production and operation of excavators, and implements the double-brand strategy of JCM and Strong. Linyi and Jining two production bases, covering a total area of 790,000 square meters, with a total construction area of 6,543,800 square meters and a total investment of 5 billion yuan. The design capacity of the first stage is 20,000 excavators per year.
2.SANY is Sany Heavy Industry.
Sany Heavy Industry was founded by Sany Group on 1994, and rose rapidly by breaking the traditional "technophobia" of Chinese people and insisting on independent innovation.
On July 3, 2003, Sany Heavy Industry was listed on A-share (stock code: 600031); 20 1 1 In July, Sany Heavy Industry was ranked in the Financial Times Global 500 with a market value of 215.84 million US dollars, becoming the only China machinery enterprise on the list so far. 20 12 1, Sany Heavy Industry acquired Putzmeister, the world's first concrete brand, and changed the global industry competition pattern in one fell swoop. ?
3. Komatsu
Komatsu Co., Ltd. (Komatsu Group) is one of the largest construction machinery and mining machinery manufacturers in the world. Founded in 192 1 year, it has a history of 90 years.
Komatsu Group is headquartered in Tokyo, Japan, with five regional headquarters in China, the United States, Europe, Asia and Japan, 65,438+043 subsidiaries and more than 30,000 employees. In the fiscal year of 2065,438+00, the Group's sales reached US$ 2,654.38+07 billion. Komatsu products are world-renowned for their complete range, reliable quality and excellent service. The main products are excavators, bulldozers, loaders, dump trucks and other construction machinery, various industrial machinery such as large presses and cutting machines, logistics machinery such as forklifts, underground construction machinery such as TBM and shield machines, and diesel power generation equipment.
4. Hitachi
Hitachi Excavator is a subsidiary of Hitachi, Japan. Thanks to the efforts of its joint venture subsidiary (Hitachi Construction Machinery Group), Hitachi Excavator has developed and produced many first-class construction machinery with its rich experience and advanced technology. Become one of the largest multinational excavators manufacturers in the world. With nearly a hundred years' mechanical manufacturing experience and strong technical development ability, Hitachi Construction Machinery has manufactured various types of hydraulic excavators of 0.5-800 tons. Japan's largest 800-ton super-large hydraulic excavator (EX8000) comes from Hitachi Construction Machinery.
5. Xugong
Xuzhou Construction Machinery Group Co., Ltd. was established in March, 1989. In the past 25 years, China has always maintained its position as the vanguard of the construction machinery industry. At present, the world's construction machinery industry ranks fifth, China's top 500 enterprises 150, and China's top 500 manufacturing enterprises rank 55th. It is a large enterprise group with the largest scale and the most complete product variety and series in China.
Expand the history of data development
At first, the excavator was manual, and it has been more than 30 years since its invention to 20 13. During this period, it has experienced a gradual development process from steam-driven bucket rotary excavator to electric-driven rotary excavator and internal combustion engine-driven rotary excavator, and then to fully automatic hydraulic excavator with electromechanical and hydraulic integration technology. The first hydraulic excavator was successfully invented by Boquelin Factory. Due to the application of hydraulic technology, in the 1940s, there appeared a hanging excavator equipped with a hydraulic backhoe on tractors.
195 1 year, the first full hydraulic backhoe excavator was launched by Poquelin factory, which opened up a new space in the field of excavator technology development. In the middle and early 1950s, traction hydraulic excavator and crawler hydraulic excavator were successfully developed. The original trial-produced hydraulic excavator used the hydraulic technology of aircraft and machine tools, and lacked hydraulic components suitable for various working conditions of the excavator, so the manufacturing quality was not stable enough and the supporting parts were not complete.
Since the 1960s, hydraulic excavators have entered the stage of popularization and vigorous development, and the manufacturers and varieties of excavators in various countries have increased rapidly, and the output has soared. During the period of 1968- 1970, the output of hydraulic excavators has accounted for 83% of the total output of excavators, which is close to 100%.
The first generation of excavators: the emergence of electric motors and internal combustion engines made excavators have advanced and applicable electric devices, so various excavator products were born one after another. 1899, the first electric excavator appeared. After World War I, diesel engines were also used in excavators. This kind of mechanical excavator driven by diesel engine (or motor) is the first generation excavator.
The second generation excavator: With the wide application of hydraulic technology, excavators have more scientific and applicable transmission devices, and hydraulic transmission instead of mechanical transmission is a great leap in excavator technology. The first hydraulic excavator in Germany was born in 1950. Hydromechanical transmission is the second generation excavator.
The third generation excavator: The wide application of electronic technology, especially computer technology, makes the excavator have an automatic control system, and also makes the excavator develop in the direction of high performance, automation and intelligence. The germination of mechatronics took place around 1965, and the electromechanical integration technology was adopted on the hydraulic excavator mass-produced around 1985, and the main purpose at that time was to save energy. Electric excavator is the symbol of the third generation excavator.
References:
Baidu Encyclopedia "Mountain Reconstruction Machine Co., Ltd."
Baidu encyclopedia Sany heavy industry co., ltd.
Baidu encyclopedia Komatsu
Baidu encyclopedia Hitachi excavator
Baidu encyclopedia Xuzhou construction machinery group co., ltd.