Walking characteristics of wheel excavator and crawler excavator

Walking characteristics of wheel excavator and crawler excavator

The crawler travels through the travel frame connected to the slewing support through the rollers, and the crawler transmits the load to the ground. Track around drive wheel and guide wheel around. In order to reduce the deflection of the upper branch, the track is supported by 1-2 carrying rollers. The driving device is driven by a hydraulic motor through a reduction gearbox to drive the driving wheels to operate the entire running equipment. When the track is stretched by wear, the tensioning device can adjust the tension.

Among them, guide wheel, roller, drive wheel and sprocket is the so-called "four-wheel belt" , is an important part of crawler-type walking device, directly related to the performance. Walking performance of excavator. This component's weight is quite big, accounts for 1/4 of the whole machine, the manufacture cost is also very high, accounts for 1/4 of the whole machine.

Therefore, the rational design of "four-wheel belt" is of great significance. In the past, there were many specifications for these parts in China. According to incomplete statistics, there are about 34 structures and 93 specifications, which affect the improvement of processing quality and the supply of spare parts. The interchangeability of parts is very poor, resulting in poor mechanical integrity. In order to overcome the above shortcomings and improve the quality, the relevant departments unified the "four-wheel-belt" drawings of excavators, bulldozers and loaders, and gradually standardize, popularize, serialize, in order to improve product quality and speed up product quality. Creating conditions for the development of construction machinery.

Wheel excavator

The wheel excavator has become a get-rich-quick tool

1.2 million mu of farmland water conservancy construction

The relevant departments issued a circular on "key points for rural water conservancy work in 2018" , stressing the need to implement central funds for farmland water conservancy construction, increase local investment and on-the-spot canal systems, "Five Small Water Conservancy" project, rural water system improvement and pond clean-up should be vigorously carried out. Construction of silt and other projects. We revised and improved county-level plans for farmland water conservancy construction, studied and formulated construction and management standards, and implemented the standardization of small-scale farmland water conservancy facilities. To ensure the completion of the construction of an additional 200,000 mu of high-efficiency water-saving irrigation district construction task. Under the conditions of design and concentration of the whole region, a number of important water-saving irrigation projects with high efficiency have been constructed.

2. Building a new type of urbanization

By the end of 2017, China's urbanization rate was 58.52 percent. Compared with developed countries, they found that the urbanization rate is generally around 80% , speeding up the construction of emerging cities and guiding the healthy development of characteristic towns.

3. Implementation of the rural revitalization strategy

The report of the 19th National Congress put forward the implementation of rural revitalization strategy. This is a major strategic arrangement of the Central Committee of the Communist Party of China, aimed at building the Xiaokang in an all round way and building a modern country in an all round way. From the perspective of infrastructure construction, the most direct sign of rural revitalization is to improve the rural living environment, improve the rural landscape.

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