Atlas Copco Rock Drills Ab

Epiroc Rock Drills Aktiebolag

Per Jonsson

Kurt Andersson

Fredrik Saf

A device for a flushing head () of a rock drilling machine (), which includes a machine housing () and, inside a cylinder (), a to and fro moveable percussive piston () arranged to exert percussive action against a shank adapter (), wherein the shank adapter has symmetry axis () and a flushing medium channel () for co-operation with a flushing medium chamber () in the flushing head () surrounding the shank adapter (), said flushing head () being provided with a connection unit () for the connection to a flushing hose (). The flushing head () and the machine housing () exhibit co-operating fastening means and fastening elements () in line with a force direction of tensile forces (F) being exerted by the flushing medium hose () on the connection unit () for movability of the flushing head () in respect of the machine housing () in directions perpendicular to said symmetry axis (). The device also concerns a rock drilling machine including such a device.

Device relating to a flushing head for a rock drilling machine and rock drilling machine

Herein a bolt () comprising an elongated body () with a central axis (C) is described. The elongated body () is in a first end () provided with a first thread () and in a second end () with a second thread (). An intermediate part () of the elongated body () is provided with a collar (). The collar () is provided with at least one first flat surface (), which first flat surface () extends substantially in parallel with the central axis (C). Further, a rock drill comprising housing parts held together by at least one bolt () is described.

Bolt, and rock drill with bolt

A device in respect of a hydraulic rock drilling machine () with a machine housing (), which encloses a hydraulic percussion device, a rotation mechanism () for rotation driving a shank adapter () and a guiding device () for the shank adapter, wherein the rock drilling machine includes at least one supply channel for lubricant to said components intended for lubrication, and at least one outlet channel () for used lubricant. Said at least one outlet channel () is connected to a separation chamber () for separating particle-shaped impurities existing in used lubricant. The separation chamber () has a discharge conduit () for treated lubricant. The invention also concerns a method and a rock drilling machine.

Device and method related to lubrication of components in a rock drilling machine and rock drilling machine

The present invention relates to a hydraulic percussive arrangement comprising a displaceable arrangement () in a casing (), in which casing () the following are arranged at the displaceable arrangement (): a first chamber () connected to a return line () for hydraulic oil, a bushing () on a first side of the first chamber () and separated from the first chamber () by a first gap () along the displaceable arrangement (), and a second chamber () with a higher pressure of hydraulic oil than that of the first chamber () and arranged on a second side of the first chamber (), separated from the first chamber () by a second gap () along the displaceable arrangement (). According to the invention, a third chamber () is fixed arranged between the second gap () and the first chamber () and the third chamber () is connected to the first chamber () not only by a first passage () but also by a third gap () along the displaceable arrangement (). The invention relates also to a piston guide in such a hydraulic percussive arrangement and to a drilling rig with such a percussive arrangement.

Hydraulic percussive arrangement, piston guide and drilling rig

The present invention relates to a method for controlling drilling parameters during an initial phase of rock drilling with a drilling machine. In accordance with the invention the percussion pressure and feed pressure of the drilling machine are controlled as continuously increasing functions during the initial phase. The present invention also relates to such a system.

Method and system for collaring

Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string comprising a first end () for connection to a drill string and a second end provided with ridges () and interposed grooves () for transfer of rotation. The grooves () at the end () directed away from the first end () of the impact adapter () are widened in the direction away from the first end ().

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Orebro, Sweden

Per Jonsson