The bulldozer was successfully developed by American Benjamin Holt in 1904. It was formed by installing a human-lifted bulldozing device in front of a crawler tractor. The power at that time was a steam engine. Later, it was successfully developed by For natural gas powered and gasoline engine driven crawler bulldozers, the bulldozer blades have also been developed from manual lifting to wire rope lifting. In 1931, the first batch of 60 bulldozers using diesel engines was successfully rolled off the assembly line. With the continuous advancement of technology, all bulldozers have been powered by diesel engines, and the bulldozer blades and ripper are all lifted by hydraulic cylinders. In addition to crawler bulldozers, there are also tire bulldozers, which appeared about ten years later than crawler bulldozers. Because crawler bulldozers have better adhesion properties and can exert greater traction, the variety and quantity of their products far exceed that of tire bulldozers at home and abroad. Internationally, all bulldozers use hydrostatic drive. This technology has gone through more than ten years of research and development. A prototype was launched in 1972, and mass production of hydrostatic drive crawler bulldozers began in 1974.
The production of bulldozers in our country only started after the founding of New China. Initially, dozing equipment was added to farm tractors. With the development of the national economy, the demand for medium and large crawler bulldozers in large-scale mining, water conservancy, power stations, transportation and other departments continues to increase. Although my country's medium and large crawler bulldozer manufacturing industry has developed greatly, it can no longer meet the needs of the development of the national economy. need. To this end, since 1979, our country has introduced crawler bulldozer production technology, process specifications, technical standards and material systems from Japan and the United States. After digestion and absorption and research on key technologies, China has formed a A pattern dominated by Komatsu technology products.
From the 1960s to the present, the number of domestic bulldozer industry manufacturers has been stable at around 4. The reason is that bulldozer products require high and difficult processing requirements, and mass production requires large investments. Therefore, ordinary companies Don't dare to get involved easily. However, with the development of the market, starting from the "Eighth Five-Year Plan", some large and medium-sized domestic enterprises began to operate bulldozers based on their own strength