1.什么是直接传动技术直接传动技术简称D D(Direcf Drive)技术,顾名思义,是指不用减速装置直接施力于受力物体而进行驱动的技术。这是不久前兴起,现在已经成熟并开始推广普及的新技术。其实,在出现机械之前,人类对各种物体都是进行直接驱动的,如用手推东西、搬东西等等。随着生产的发展,许多工作仅靠直接施力于受力物体,往往非人力所及。因此便设法对力进行放大,如用斜面搬运巨石,以及使用撬棍.滑轮、齿轮等等。这就已经 1. What is the direct transmission technology Direct transmission technology referred to as D D (Direcf Drive) technology, as the name implies, refers to the technology without the deceleration device directly to force the object to be driven. This is a recent rise, now mature and begin to promote new technologies popularized. In fact, before the emergence of machinery, humans are directly driven by various objects, such as pushing things by hand, moving things and so on. With the development of production, much of the work is often directed at stressed objects, often beyond human hands. So I tried to magnify the force, such as carrying boulders with bevels and using crowbars, pulleys, gears, and so on. This is already