公开(公告)号：EP1137863A4

公开(公告)日：2002-03-06

申请号：EP99973316

申请日：1999-11-09

申请人： BETEK BERGBAU & HARTMETALL

发明人： KAMMERER KARL

IPC分类号： B28D1/18 ,  E21C35/18 ,  E21C35/197 ,  E21C35/183

CPC分类号： E21C35/18 ,  B28D1/188 ,  E21C35/197 ,  E21C2035/1826

摘要： The invention relates to a fixture for a round shank chisel (10) to a road milling machine or the like. Said round shank chisel (10) has a chisel head (12) and a chisel shank (14). With a bearing surface said chisel head (12) rests upon a wearing protection disk (19) which in turn rests on a chisel holder (20) and is supported by it. Said chisel shank (14) is accommodated by a location bore (21) of the chisel holder (20). The aim of the invention is to prevent dirt from penetrating the area of the location bore (21) of such a fixture and a the same time to ensure that the free movability of the round shank chisel (10) is not impaired. To this end, the chisel holder (20) has a circumferential projection (23) or a circumferential depression which extends along the location bore (21). Also, the wearing protection disk (19) is provided with a circumferential receiving groove (19.6) or a circumferential shoulder and the projection (23) or the depression of the chisel holder (20) engages with the receiving groove (19.6) or the depression of the wearing protection disk (19) when the round shank chisel (10) is assembled.