Damping device for impact device, impact device and rock drill

摘要

The impact device damping device of the hydraulic rock drill (1) having the striking direction (R) has a damping piston (5) acting in the axial direction with respect to the tool, and the damping piston (5) A first piston part (6) received in the damping chamber (7) and a second piston part (8) received in the second damping chamber (9), during operation, The damping piston (5) is set against the fixed stop (19) with respect to movement in the striking direction. At all axial positions of the damping piston, a damping slot (10) is established between the first damping chamber (7) and the second damping chamber (9), and the first damping chamber (7) Pressurized by fluid pressure. The invention also relates to an impact device and a rock drill. [Selection] Figure 2