UPPER BEAM FOR A TELESCOPIC FEEDER, TELESCOPIC FEEDER AND DRILLING DEVICE FOR ROCK DRILLING

摘要

The object of the invention is to provide a drilling device which is compact
and has good sliding properties. The object is achieved by an upper beam for
use with a lower beam in a telescopic feeder for a drilling device for rock
drilling. The upper beam extends along a longitudinal axis and has a generally
U-shaped cross section comprising a bottom wall and a first and a second side
wall. Each side wall has an inward surface and an outward surface. The upper
beam comprises a cooperating member intended for sliding cooperation with the
lower beam. The cooperating member comprises an attachment means extending
outwardly from each outward surface of each side wall. Each attachment means
is intended for fixed mounting of a crank block bracket, which crank block
bracket faces said outward surface of each side wall.