| 摘要 |
588423 A rock drill, with a cylinder body including a central channel adapted to be connected in line to a percussive drill bit, the cylindrical body has a bottom side with a foot pad. The foot pad has a plurality of ridges. The rock drill also has a sliding frame and a support member. The support member is removably connected to the cylinder body. The support member has a mating surface. The mating surface includes a plurality of corresponding ridges adapted to mate with the plurality of ridges of the foot pad which allow the transfer of shear forces. The support member is configured to guide the movement of the cylinder body relative to the sliding frame by contacting the sliding frame.
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