英国煤炭工业公司为本专利的发明者,在本专利中提出了一种采煤机牵引装置。本专利提出的采煤机有一链轮组,后者由两导轮间的一传动链轮组成。当采煤机沿牵引链移动时,其中一个导轮把张紧的部分牵引链链绕在传动链轮上,而另一导轮则使松弛的部分牵引链离开传动链轮。 British Coal Industry Corporation as the inventor of this patent, in this patent proposed a Shearer traction device. The coal mining machine proposed in this patent has a sprocket set, which consists of a drive sprocket between two guide wheels. As the shearer moves along the traction chain, one of the idler rollers winds the tensioned part of the traction chain around the drive sprocket while the other idler leads the loose part of the traction chain away from the drive sprocket.