Excavator development history
Originally excavator was manual, from the invention until 2013 has been more than one hundred and thirty years, during the period from steam driven bucket rotary excavator to electric drive and internal combustion engine driven rotary excavator, the application of electro-hydraulic integrated technology Automatic hydraulic excavator the gradual development process. The first hydraulic excavator was invented by the French plant in Poclain. Due to the application of hydraulic technology, the 1940s came equipped with hydraulic backhoe-mounted excavators on tractors. Launched in 1951 by the Poclain plant in France, the first fully hydraulic backhoe was launched in France in the field of excavator technology. In the early and mid 1950s, towed Full-swing hydraulic excavators and crawler hydraulic excavators. The initial prototype hydraulic excavator is the use of aircraft and machine tool hydraulic technology, the lack of excavators for a variety of working conditions of hydraulic components, manufacturing quality is not stable enough, the kit is not complete. Since the 1960s, hydraulic excavators have entered the stage of promotion and vigorous development. Excavator manufacturing plants and varieties of various countries have increased rapidly and their output soared. Between 1968 and 1970, hydraulic excavator production accounted for 83% of the total excavator output, close to 100%.
The first generation of excavators: the emergence of electric motors, internal combustion engines, excavators have advanced and suitable electric devices, so a variety of excavator products have been born. In 1899, the first electric excavator appeared. After the First World War, diesel engines were also applied to excavators. This diesel (or motor) driven mechanical excavator is the first generation of excavators.
The second generation of excavators: With the widespread use of hydraulic technology, excavators have a more scientific and applicable transmission, hydraulic transmission instead of mechanical transmission is a big technological leap in excavators. 1950 Germany's first hydraulic excavator was born. Hydraulically powered mechanical transmission is the second generation of excavators.
The third generation of excavators: Electronic technology, especially computer technology is widely used, the excavator has an automated control system, but also to excavators to high performance, automation and intelligent direction. The sprout of mechatronics occurred around 1965, while the use of mechatronic technology in mass-produced hydraulic excavators was around 1985 when the main purpose was to save energy. Digger excavator is the third generation of excavators logo.
Excavator industry manufacturers can be divided into four categories. More than 70% of domestic excavators are occupied by foreign brands. Domestic brands are still mainly dug and dug. However, the share of domestic excavators is gradually increasing, up 3.6% from 2012.