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在土方机械中,铲运机也是很重要的机械。它和推土机一样担任铲土、运土工作,所不同的是它的运距宜较远,推土机运距宜较近。并且铲运机轮胎在填土层上压过,起着分层压实的作用,有助于路基质量的提高。铲运机有拖式和自动式两种:拖式铲运机本身不能行动,须靠拖拉机牵引,并且,它的铲土动作也是由拖拉机操纵设备来控制的;自动铲运机却完全是自己操纵、自己行动的。从卸土方法上分类,铲运机有好几类,即自由卸土式、强制卸土式及半强制卸土式,最常用的是强制卸土式。Д-147型铲运机(图1)就是这一种。它的构造很
In earthmoving machinery, scrapers are also very important machinery. It is the same as the bulldozer shovel soil, earthwork, the difference is that it should be far away from the distance, bulldozers should be closer to the transport distance. And the scraper tire pressure over the fill layer, plays the role of layered compaction, contribute to the improvement of subgrade quality. Scrapers have towed and automatic two types: towed scraper itself can not act, to rely on tractor traction, and its shovel action is also controlled by the tractor control equipment; automatic scraper is completely own Manipulation, their own actions. From the classification of dumping methods, there are several types of scraper, that is, free-dumping, forced unloading and semi-forced unloading, the most commonly used is the mandatory unloading. This is the type of Д-147 scraper (Figure 1). Its structure is very