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The walking characteristics of wheeled excavators and crawler excavators

The crawler-type walking device passes through the traveling frame connected to the slewing support device and passes through the rollers, and the crawler transmits the load to the ground. The track wraps around the drive wheel and the guide wheel. In order to reduce the deflection of the upper branch, the track is supported by 1-2 carrying rollers. The transmission of the traveling device is driven by a hydraulic motor through a reduction gear box to drive the driving wheels to operate the entire running equipment. When the track stretches due to wear, the tensioning device can adjust the tension.

Among them, guide wheels, rollers, driving wheels and sprockets are the so-called “four wheels and one belt”, which are important components of crawler walking devices, and are directly related to work performance. Excavator walking performance. . The weight of this part is quite large, accounting for about 1/4 of the whole machine, and the manufacturing cost is also very high, accounting for about 1/4 of the whole machine.

Therefore, the rational design of the “four wheels and one belt” is of great significance. In the past, these parts had many specifications 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 components is very poor, resulting in low mechanical integrity. In order to overcome the above shortcomings and improve quality, relevant departments have unified the “four wheels and one belt” drawings of excavators, bulldozers, and loaders, and gradually standardized, promoted, and serialized them to improve product quality and speed up product quality. The development of construction machinery creates conditions.

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