Abstract: A includes a control arm comprising a first link and a second link, a lift arm articulately connected to the first link by a first joint and a first actuating means articulately connected to the first link by the second joint. The second link and the lift arm are adapted to permit a pivotal connection with a loading means by a third joint and a fourth joint, wherein the lift arm is adapted to lift and lower the loading means and the first actuating means is adapted for actuating the control arm, by acting on the first link in at least a direction from the first actuating means, to achieve a rotational movement of the loading means around said fourth joint, when the loading means is connected to the control arm and to the lift arm. During action of the first actuating means on the first link in the direction from the first actuating means a decrease of a distance between the second joint and the third joint is achieved.

Abstract: A method and an apparatus for rock reinforcement are described. The method comprises the steps: to inject a first component and a second component through a first channel and a second channel respectively into a rock hole, wherein the first component and the second component are adapted for rock reinforcement and to inject a blocking agent through a third channel into at least said second channel, wherein said blocking agent provides a barrier in at least said second channel.

Abstract: A tensioning device for a chain transmission for movement transfer between a driver device and a slide to be driven by a drive chain along a linear guide of a rock drill rig. A first fastening member fastens a first end of the drive chain on the slide. A second fastening member fastens a second end of the drive chain on a tensioning head, which is arranged displaceable in a tension direction of the drive chain on the slide. A spring device is arranged between the tensioning head and the slide for spring loading the tensioning head in the tension direction. At least one of the first and second fastening members includes an adjuster for adjusting tension in the drive chain. Also a method, a handling device and a rock drill rig.

Abstract: Damping device for a percussion device of a hydraulic rock drilling machine (1) with a striking direction (R), including a damping piston (5) for action in an axial direction against a tool, wherein the damping piston (5) exhibits a first piston portion (6), which is received in a first damping chamber (7) and a second piston portion (8), which is received in a second damping chamber (9). In operation, in a normal striking position of said percussion device, the damping piston (5) is set against a fixed stop (19) against movements in the striking direction. A damping slot (10) is established between the first (7) and the second (9) damping chamber in all axial positions of the damping pistons, and the first damping chamber (7) is pressurized with a hydraulic pressure. The invention also concerns a percussion device and a rock drilling machine.

Abstract: A method for determining efficiency of a drilling process comprising the steps of: transferring energy via a tool member to the material in which drilling is to be performed by means of a drilling configuration; detecting waves which are propagating in said tool member of said drilling configuration during drilling as a result of energy provision; detecting said waves by means of at least two sensor means arranged on mutually opposite sides of said tool member adjacent to, on a certain distance from, said tool member, which sensor means are based on inductive and/or capacitive detection of said waves in said tool member; and based on results of said detection, determining said efficiency of said drilling process.

Abstract: A positioning arrangement, a rod handling device, a drill rig and a method for positioning a drill rod are provided. The positioning arrangement comprises a positioning organ, arranged to position a drill rod with a length axis, and a displacement arrangement with a first portion and a second portion, the first portion being connected to the positioning organ and the second portion being connectable to a base part. The displacement arrangement is arranged to displace the positioning organ from a first position to a second position via a translational displacement, such that a length axis of a drill rod positioned by the positioning organ will be substantially aligned with the drill hole axis in the second position.

Abstract: A chuck for a drill head of a rotation rock drilling rig, wherein a plurality of jaws are equally angularly distributed around a grip position axis, wherein the jaws co-operate with actuator means for radial movements of the jaws, and wherein the chuck includes urging means being arranged for influencing the jaws into the release position. The urging means is a partially annular jaw spring surrounding said axis and having two spring ends adjacent to each other. The jaws together form an inside seat for the jaw spring and the jaw spring is arranged for fixing engagement with one of the jaws. The invention also relates to a drill head, a rig and a jaw spring.

Abstract: The present invention relates to a method for driving a mining and/or construction machine, where said machine is arranged to be controlled by an operator by means of maneuvering means, where said operator, when driving said machine, provides steering commands by means of said maneuvering means for maneuvering said machine. The method comprises, when said machine is being driven in an environment having at least a first obstacle: when said machine is within a first distance from said first obstacle, estimate a first path that has been requested by said operator by means of said steering commands, by means of a control system, determining whether said machine when moving according to said requested first path will be driven within a second distance from said first obstacle, and when it is determined that said machine, when travelling according to said first path, will be driven within said second distance from said first obstacle, retard said machine by means of said control system.

Abstract: A method and an apparatus for rock reinforcement are described. The method comprises the steps: to inject a first component and a second component through a first channel and a second channel respectively into a rock hole, wherein the first component and the second component are adapted for rock reinforcement and to inject a blocking agent through a third channel into at least said second channel, wherein said blocking agent provides a barrier in at least said second channel.

Abstract: A method for controlling propulsion of a drilling rig. The drilling rig includes a right propulsion unit and a left propulsion unit and mutually independent speed control and a transmission for driving the right propulsion unit and the left propulsion unit. The transmission provides at least two gear states of a gear box. A propulsion speed is request for the right propulsion unit and for the left propulsion unit. A difference is determined between a requested propulsion speed of the right propulsion unit and the left propulsion unit. A suitable gear state is determined based on the determined difference. Also a computer program product including program code for a computer for implementing the method. A system and a drilling rig equipped with the system.

Abstract: A method for assigning a set of tasks to a plurality of drill rigs, said tasks including drilling of holes by said plurality of drill rigs. The method includes defining a first set of constraints to be fulfilled when assigning tasks to said plurality of drill rigs finding an overall solution fulfilling said first set of constraints by solving each constraint as a sub-problem, a solution to at least one sub-problem being dependent on the solution of at least one other sub-problem; said overall solution fulfilling said first set of constraints being determined when a solution to a first of said sub-problems is validated by solutions of others of said sub-problems, and assigning tasks to said plurality of drill rigs according to the determined validated overall solution, wherein tasks of said set of tasks are arranged to be carried out at least partially overlapping in time by said plurality of drill rigs.

Abstract: Rock drilling machine (10) comprising a piston that is arranged to move back and forth in a chamber (12a, 12b) when the rock drilling machine (10) is in use, a cavitation-sensitive component (14), and an oil channel that is arranged to extend between the chamber (12a, 12b) and said cavitation-sensitive component (14). The oil channel comprises a series of restrictions (18) and oil volumes (20) to hinder the movement of cavitation bubbles through said oil channel.

Abstract: A drill head for a rotation drilling rig, including: a rotation motor, a drill head spindle, and a gear change transmission between the rotation motor and the drill head spindle, the gear change transmission including an input shaft connected to the rotation motor and an output shaft connected to the drill head spindle. The input shaft is co-axial with the output shaft, the input shaft is permanently coupled to an intermediate shaft over a first speed reduction gear couple, the gear change transmission) includes a clutch being shiftable between a first position interconnecting the input and output shafts for obtaining the same rotational speed for the input and output shafts, and a second position connecting the intermediate shaft to the output shaft over a second speed reduction gear couple. The invention also relates to a rig.

Abstract: A handing device for handling drill string components in a rock drill rig. The handing device includes a magazine for storing drill string components to be introduced into and removed from a drill string position of the drill rig. The magazine includes, in the region of a loading position, a transfer unit for separation of a drill string component being positioned on a support from an adjacent drill string component and to transfer the separated drill string component to the loading position. The transfer unit includes a plurality of pivot arms being pivotal around a pivot axis, being parallel to the axial direction, from a first position. The pivot arms lie against a drill string component being closest to the loading position on the support, to a second position. The pivot arms allow bringing down the separated drill string component to the loading position. Also a rock drill rig.

Abstract: A driver (3) for the transfer of torque and rotation from a rotation chuck (5) to a drill steel (2), whereby the cross-section of the driver (3) is limited outwards by curves, in particular by arcs, united to form a closed FIG. 6 that can be approximately described as a polygon, and limited inwards by splines (4). The FIG. 6 comprises four sides (7) and four corners (8). The splines (4) comprise a number of spline teeth (10), the number of which is divisible by four.

Abstract: A device for a flushing head (3) of a rock drilling machine (1), which includes a machine housing (3) and, inside a cylinder (18), a to and fro moveable percussive piston (17) arranged to exert percussive action against a shank adapter (15), wherein the shank adapter has symmetry axis (19) and a flushing medium channel (22,23) for co-operation with a flushing medium chamber (24) in the flushing head (3) surrounding the shank adapter (15), said flushing head (3) being provided with a connection unit (7) for the connection to a flushing hose (10). The flushing head (3) and the machine housing (2) exhibit co-operating fastening means and fastening elements (6) in line with a force direction of tensile forces (F) being exerted by the flushing medium hose (10) on the connection unit (7) for movability of the flushing head (3) in respect of the machine housing (2) in directions perpendicular to said symmetry axis (19). The device also concerns a rock drilling machine including such a device.

Abstract: A device for handling drill string components with respect to a drill rig. A gripper is configured to grip a first drill string component to be threaded on to or off from a second drill string component being part of a drill string which is partly drilled into a rock formation. A handling unit includes the gripper is movable between a drill string position and a loading position wherein a drill string component can be brought into or taken out from the gripper. The handing unit includes auxiliary engagement unit configured to align the gripped first drill string component to essentially in line with an axial direction defined by the second drill string component. The gripper and the auxiliary engagement unit are adjustable for gripping drill string components of different dimensions with maintained alignment of gripped drill string components.

Abstract: A method for assigning a set of tasks to a plurality of mining machines, said machines being arranged to be driven between positions for performing tasks is provided. The method includes defining a first set of constraints to be fulfilled finding an overall solution fulfilling the first set of constraints by solving each constraint as a sub-problem, a solution to at least one sub-problem being dependent on the solution of at least one other sub-problem; the overall solution fulfilling the first set of constraints being an overall solution where a first of said sub-problems is validated by solutions of others of the sub-problems, and assigning tasks to the machines according to the determined validated overall solution, wherein tasks are arranged to be carried out at least partially overlapping in time by the mining machines.

Abstract: The present invention relates to a percussion rock drilling machine comprising a front head (1), in which front head (1) are arranged a flush housing (26) and a flush connector (25) for flushing medium. According to the invention, a sheath (31) of rust-resistant material is arranged at the front head (1) around the flush housing (26), such that flushing medium can enter the flush housing (26) through the flush connector (25), without coming into contact with the front head (1).

Abstract: Arrangement (10) for a rock grouting equipment for positioning at least one cartridge (11) is described. The arrangement incorporates at least one magazine (12), arranged around an axis (15). The magazine (12) incorporates at least one space (13), in which space (13) a plurality of said cartridges (11) is stored. The arrangement further incorporates at least one, radially extending, catching device (3, 14), arranged and formed such that it catches at least one cartridge (11) between itself and the inner surface (4) of the magazine body (12), when it performs a rotating movement around the axis (15). The invention also relates to a method.