Oy Tampella Ab

Pekka M Salmi

Hannu I Paasonen

Timo Muuttonen

Aimo Helin

Esa Karru

Jarmo Heinonen

Timo Kiikka

Juhani Lappalainen

Pekka Heiskanen

Kari Farlin

Timo Muttonen

Jusha Piipponen

An arrangement for handling a drilling equipment comprising clamping jaws (11a, 11b) mounted rotatably with respect to the axis of a drill tube (8a, 8b) and a breaking device (7) mounted rotatably about the axis of the drill tube (8a, 8b) and movably in the longitudinal direction of a feed beam (3), which breaking device can be connected to the drill tube (8a, 8b) or the like unrotatably with respect thereto. To move the drill tube (8a, 8b) or the like to the drilling position and away from it, respectively, the breaking device (7) is mounted turnably about an axis transverse to the longitudinal axis of the feed beam (3), which makes it possible to push the horizontal tube (8b) or the like into the breaking device (7) turned to the direction transverse to the feed beam (3) and to fasten it to the breaking device, after which the tube (8b) can be turned into a drilling center between a rotating mechanism (5) and the previous drill tube (8a) by moving the breaking device (7) along the feed beam (3).

Arrangement for handling drill rods in a rock drilling unit or the like

In a rotary drilling apparatus, a rotary head is advanced against an object to be drilled and a neck element included in the rotary head and connected with drilling member is rotated around its longitudinal axis relative to a rotary head body. The neck element is subjected, in a normal drilling situation to the action of two oppositely-directed forces produced by means of a pressure medium, the first force acting in the drilling direction and the second force acting in the direction opposite to the drilling direction, the first force being greater and the difference between the forces producing a feeding force. The neck element is movable in the direction of the feeding force. In a drilling situation, when the force acting in the direction opposite to the feeding force is greater than the feeding force, the neck element moves in the direction opposite to the drilling direction relative to the rotary head body. During this movement, the first force is maintained at least equal to that which is required in a normal situation and the action of the second force is eliminated. As the force exerted on the neck element opposite to the feeding force is diminished, the action of the first and second forces, and thus the feeding force is restored with the neck element moving in the drilling direction.

Method in rotary drilling and rotary drilling apparatus

The invention relates to an arrangement for the axial bearing of the drilling machine. The drilling machine thereby comprises a body (6), a percussion device (1) fitted in the body, and a rotation bushing (3) functioning as a rotating means of a shank (2) positioned on an axial extension of the percussion device. Furthermore, an axial bearing is fitted within the body (6) for receiving the axial forces exerted on the body (6) through the shank (2). In order to provide resilience, the axial bearing is arranged to be displaceable in the axial direction under the influence of a pressure medium acting thereon. To resiliently receive a percussion impulse reflected from the rock during the drilling process, the pressure and volume flow of the pressure medium of the axial bearing is adjustable so that the position (Y) of the axial bearing is between the extreme positions (0,.DELTA.X) of the axial bearing under the normal operating conditions of the drilling machine.

Arrangement for the axial bearing of a drilling machine

Continuously revolving percussion drilling machine, which comprises a body (1), a drill shank (2) mounted rotatably and axially slidably in the body for causing impacts on the drill rod, an impact mechanism (3) positioned in the body for causing axial impacts on the drill shank, and a rotating device (4) for rotating the drill shank around its axis. The drill shank is provided with a toothing (8), which is coupled in direct engagement with a toothing (9) revolving in relation to the drill shank and rotating the drill shank, said toothing of the drill shank being axially displaceable in relation to said rotating toothing, so that the contact surfaces of the teeth of the toothing on the drill shank and of the toothing rotating the drill shank revolve and are exchanged constantly. The teeth operate cold and well lubricated. The rotating toothing may be a cogwheel or a tooth rim.

Continuously revolving percussion drilling machine

A coupling arrangement for a percussion drilling machine for coupling of a shank (7) unrotatably to a frame bushing (2) rotatably mounted in a frame and rotated by a rotating device. The frame bushing is provided with axial driving grooves (12) opening towards the shank and the shank is provided with axial counter grooves (13) opening towards the frame bushing. Rod-like wedge pieces (11) are mounted each in a pair of grooves formed by the grooves. The cross-section of each wedge piece comprises an arched surface portion (11a) and at least one planar surface portion (11b). Such wedge piece can adjust its position by turning in one groove of the pair of grooves so that the planar surface of the wedge piece is pressed into a planar contact with the planar surface of the other groove.

Coupling arrangement for a drill shank of a percussion drilling machine

Wedge for a drill shank of a percussion drilling machine

A pressure-medium driven percussion device including a body, a drill shank gliding axially in the body for transmitting percussions to a drill rod and a percussion piston moving in the body for directing percussions axially to the drill shank. The drill shank includes a lifting piston which moves in a lifting cylinder within the body. The body further includes a channel passing to the lifting cylinder for supplying and removing pressure medium into and out of the lifting cylinder and seals located between the body and the drill shank at both sides of the lifting cylinder. An equalizing channel is located between each seal and a corresponding choking slot. A valve connects the equalizing channels to the source of pressure medium when a channel passing to lifting cylinder is connected to a pressure medium container, and, correspondingly, to the pressure medium container when the channel passing to the lifting cylinder is connected to the source of pressure.

Pressure-medium driven percussion device

Shank adaptor for a rock drill

A drill steel centralizer comprising a body having an immovable jaw positioned in stationary relation to the body. A movable jaw and drill steel guide between said jaws that can be opened and closed by means of the movement of the movable jaw. A locking device providing means by which the movable jaw can cause the drill steel guide to be locked and released into the closed and open positions. Thus, the locking device is held in its locked position by an elastic member that is arranged to transmit a force attempting to open the jaw past the elastic member directly to the body.

Drill steel centralizer

A hydraulic control system for use with a rock drill is adapted to sense a pressure build-up in the drill's rotation motor and in response thereto, to reverse the direction of feed of the feed motor as well as to supply hydraulic fluid to a shank cylinder on the rock drill. Supplying hydraulic fluid to the shank cylinder assists in freeing the drill from the rock.

Control system for a rock drill

A striking apparatus that includes a reciprocating striking piston operable by a pressure mechanism, a cylindrical body, the improvement comprising a sleeve bushing mounted inside of the cylindrical body in slidably fitted assembly therewith. The sleeve bushing has a drive gear at one end for rotary engagement with a drive motor. A rotary tool and piston shank and piston are all integrally combined as a one piece unit and at least partly received in coaxial alignment within the tubular bushing. Spline gearage exists between the tubular bushing and the piston shank enabling co-rotational rotary movement together upon actuation of the drive gear through operation of a drive motor operatively connected therewith. A piston cylinder in the cylindrical body along with the piston is reciprocably movable in the piston cylinder. The shank has a shank face facing in the direction opposing the striking piston and with the shank face transferring the feed force from the body through the sleeve bushing to the rotary tool. There is structure cooperable with the piston cylinder for assisting a pressure medium to be directed towards the front of the piston so that the latter moves backwards towards the striking piston causing a striking contact between an end surface of the shank and the striking piston when the tool becomes stuck.

Rock drill apparatus

A hydraulic drilling apparatus, especially a rock drill comprising a body, a cylinder in the body and a percussion piston reciprocating in the cylinder. A tool is connected to the body and a motor is provided for rotating the tool. A control valve is also provided for the percussion power. A control valve is also provided for regulating the motor speed. Both of these control valves are operated independently by one lever. A hydraulically operated flushing valve is also provided. A hydraulic pump and hydraulic channels coact to form a percussion circuit and a rotation circuit is parallelly coupled with the percussion circuit in relation to the hydraulic pump. A flushing valve circuit is controlled by the percussion circuit and a circuit for the free circulation of the hydraulic pump which is parallelly coupled with the percussion circuit in relation to the hydraulic pump. The circuits are connected to the hydraulic pump. The control valves are disposed in the body of the percussion apparatus with one of these valves being in the rotation circuit for controlling the flow rate which valve is a pressure-compensated flow control valve with a throttling control.

Hydraulic drilling apparatus

A hydraulic percussion apparatus comprising a body, a cylinder in the body and a percussion piston reciprocating in the cylinder. A distributing valve moves in a valve housing. A valve for starting and stopping the percussion apparatus is provided. A hydraulic pump and hydraulic channels form a percussion circuit with a gas/liquid pressure accumulator. A distributing valve circuit and a free circulation circuit are provided for the pump which are parallelly coupled with the percussion circuit, which circuits are connected to the pump and to the start-and-stop valve which has positions for controlling pressure in the circuits. The start-and-stop valve has a middle position during which pressure in the percussion circuit rises up to a predetermined value while the distributing valve circuit remains closed independent of the pressure in the percussion circuit.

Hydraulic percussion apparatus

A drilling machine including a rock drill comprising a striking piston fitted to reciprocate in a cylinder. The piston is driven by a pressure medium. A rotation motor is provided and is driven by a pressure medium. A pump piston is permanently connected to a striking piston in concentric relation and arranged to travel in a pump cylinder. The cylinder is concentric with the cylinder that operates the striking piston and is axially spaced therefrom. The pump piston is arranged to provide a pump pressure medium to the rotation motor.

Growing community of inventors

Tampere, Finland

Pekka M Salmi