bulldozer
A bulldozer , also a push crawler , bulldozer , chain scraper is a flat excavator that is used for loosening or transporting as well as for laying soil. Bulldozers are tracked vehicles ; Graders with a wheeled chassis are wheel graders.
history
Bulldozers emerged in the United States between the world wars. The origins were heavy tractors, caterpillar tractors that were equipped with a clearing blade .
function
Bulldozers have a steel shield on the front that they can use to push the ground. Bulldozers can be equipped with various accessories, e.g. B. Rippers (single, multiple), with which the ground behind the bulldozer can be torn up and loosened. Rippers are also used in quarries. There are also winches, plows and laser control systems that can be used for automatic leveling , i.e. H. the blade control is carried out automatically. There are GPS controls to control the installation of the material in large renovation or construction projects.
Dozer blades are available in the following main designs:
- adjustable shield
- straight shield
- U-sign for moving large amounts of soil
- S-sign mainly for fine grading
- V-shield for creating incisions
Smaller caterpillars have a so-called 6-way shield, which can be adjusted in three levels.
Ripper on a Liebherr 724 bulldozer
Caterpillar bulldozer with laser control system above the blade
Caterpillar D6R with U-shaped shield at work
Heavy dozer BAT-M with adjustable blade
Dozers for special applications
In mountain resorts are snow cats (also snow cats or PistenBully ) standard, which typically have a very low center of gravity and a very large contact surface. You can negotiate steep slopes easily. Your job is to level snow and prepare it for skiing.
Bulldozers are also used in agricultural operations. The tasks here are limited to earthworks and bogging down maize silos . Their high weight and large shields are particularly advantageous.
The Israeli armed forces use armored bulldozers for pioneering work . Rome plow was the name of a bulldozer used by the US military during the Vietnam War.
Snow groomer Kässbohrer PB 260 D
Armored caterpillar IDF Caterpillar D9
See also
Individual evidence
- ↑ Günter Kunze, Helmut Göhring, Klaus Jacob: Construction machinery: Erdbau- und Tagebaumaschinen , Springer-Verlag , 2013, ISBN 9783663093527 pp. 198–199 [1]
