公开(公告)号：EP4095349A1

公开(公告)日：2022-11-30

申请号：EP22161389.6

申请日：2022-03-10

申请人： AB Tunnelling Srl

发明人： BERTOLI, Andrea ,  LUPI, Stefano

IPC分类号： E21C35/183 ,  B22F3/15 ,  E21D9/11 ,  B22F5/00

摘要： Described is a mechanical boring tool, in particular for excavating tunnels, which comprises, on a substantially cylindrical base body (5), extending along a central axis (X) and which is designed to be removably connected to the drive head of a machine for excavating tunnels, a series of cutting elements, wherein at least one (1) of the cutting elements has a connecting portion (3) with the base body (5), a tooth (2) protruding from the base body (5) and extending along a vertical direction (Y) substantially normal relative to the central axis (X) and a cutting edge (6) defined on an end portion of the tooth (2).
The tooth (2) has at least one lateral profile (2a) which defines an upper angle (B) with the limiting line (Z) of the cutting edge (6)
A particular feature of the invention is due to the fact that the upper angle (B) is substantially between 70° and 85°, inclusive, preferably between 73° and 84°, inclusive, more preferably between 75° and 81°, inclusive, even more preferably between 77° and 79°.