| 摘要 |
The invention concerns a hydraulic drilling apparatus (2) comprising: a housing (3) comprising a front portion (4); a shank (6) comprising a fluid injection conduit (12) and intended to be coupled to at least one drill rod provided with a bit; a striking piston (5) mounted sliding inside the housing (3) along a striking axis (A) and configured to strike the shank (6); an extraction piston (35) disposed around the shank (6) and comprising an extraction portion (36) configured to engage with the shank (6); and a cartridge (15) removably mounted on the front portion (4) and arranged around the shank (6), the cartridge (15) comprising an injection portion (21) configured to fluidly link the fluid injection conduit (12) to a fluid supply conduit (25). The cartridge (15) delimits a receiving housing (34) in which the extraction piston (35) is slidingly mounted. |
