Drill stand for core-drilling machine for drilling concrete material, has rotary drive unit whose rotating movement is transferred on rack gear intervention gear wheel through auxiliary gear box or without auxiliary gear box

摘要

The drill stand has a rack gear portion (10) that is secured at a guide column portion (1). An auxiliary gear box is connected with a speed reduction gear element for reducing the speed of a feed mechanism. The speed reduction gear element is provided with a drive shaft and a driven shaft. The rotating movement of a rotary drive unit is transferred on a rack gear intervention gear wheel through the auxiliary gear box or without the auxiliary gear box.