Rock drill with feed mechanism incorporating pressure chamber,申请号SE19870004841-传众专利搜索

Rock drill with feed mechanism incorporating pressure chamber

申请公布号：SE456920(B)

申请号：SE19870004841

申请日期：1987.12.03

申请公布日期：1988.11.14

申请人：

ATLAS COPCO AB NACKA

发明人：E T E *LIDSTRAND;B S *AAKRE

分类号：B25D;(IPC1-7):E21C5/00

主分类号：B25D

摘要：The drilling machine is fluid-driven, moving forwards and backwards along a feeder beam (12). The feed mechanism (15,16) incorporates the pressure chamber (16), and a neck part (17) on the drilling train (13) is movable in the chamber. The pressure in the chamber is dependent upon the position of the neck part in the drilling machine (11) and controls a valve (20) which regulates supply of pressure fluid to the feed device (15,16) moving the drilling train (13) towards the rock face. An inlet (18) and an outlet (19) for pressure fluid are provided, and fluid flow through the outlet is controlled by the drilling train (13) neck part (17). Pressure in the chamber (16) throttles fluid flow through the valve (20) against the effect of a spring (25) and/or applied fluid pressure (26).