FI121894B - Method of operating the holding device and holding device - Google Patents

Description

Method of operating the holding device and holding device

Background of the Invention

The invention relates to a method for moving the clamping arms of a mining holding device so that the clamping jaws on the clamping arms simultaneously move towards each other, thereby clamping a drill bar, a rock bolt or a similar mining tool located in a drilling center of a rock drilling unit. There is mechanical synchronization between the press arms to make their movements interdependent.

The invention further relates to a retaining device which can be mounted on a feed beam of a rock drilling unit, bolting device or similar mining device. The holding device comprises at least two clamping jaws which are moved by one or more actuators. There is a synchronization mechanism between the clamping arms for interlocking their movements.

The field of the invention is more fully described in the preambles of the independent claims of the application.

The rock drilling unit uses a rock drilling unit with a rock drill and a tool connected thereto to provide a drill hole for the material to be processed. The tool may comprise a drill rod and a drill bit connected to its outermost end 20 or, in the case of drilling long drill holes, several drill rods connected in series to form an extension rod arrangement. When starting a drill, it is necessary to center the drill rod by guiding it through the gripping jaws of the holding device in the drilling center. In addition, the holding device may be used to lock the drill rod or other drilling tools into an anti-rotation, for example when drilling rods are connected to one another, to a drill or to a drill bit for a crown.

US 4438984 discloses a holding device in which the pressing arms of the holding device are connected to each other by a rod which transmits forces from one O) cm to another. The structure shown requires a lot of space in the feed beam.

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BRIEF DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a novel and improved method for operating a holding device and a holding device.

The method according to the invention is characterized in that at least one portion 35 of the first press arm and the second press arm is arranged in an overlapping manner and the openings 2 in the overlapping portions are aligned; and transmitting movement between the press arms by means of a hub coupling pin which engages the mold surfaces on the press arms.

The holding device according to the invention is characterized in that the en-5 first clamping arm and the second clamping arm overlap at least a portion of the contoured surfaces; that the contour surfaces define the coupling alley; and that the coupling pin is provided with a coupling pin, which coupling pin is adapted to transmit movement between the mold surfaces of the press arms.

The idea of the invention is that the holding device comprises a synchronization means, in which the movements of the pressing arms are made to be forced to control one another. Synchronization means are shaped members arranged on the press arms which are located between the pivot arms of the press arms.

An advantage of the invention is that when the synchronization means are disposed on the portion between the pivoting joints, they do not in any way increase the dimensions of the holding device ul-15. A further advantage is that by utilizing the shape surfaces formed on the press arms, the synchronization can be carried out using a simple mechanical structure and a small number of components. As a result, synchronization does not significantly increase the weight of the holding device. The operation of the holding device according to the invention is also reliable.

The idea of one embodiment is that the synchronization means comprise directly formed surfaces on the structure of the first and second press arms, which are arranged against each other and which, by their opposing contact surfaces, transmit synchronization movements between the press arms.

The idea of one embodiment is that the first clamping arm and the second clamping arm are provided with mutually matching teeth which are arranged against one another. In this case,

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between the arms is transmitted by direct tooth contact.

The idea of one embodiment is that the mold surfaces formed on the first and ^ 30 second pressing arms are in continuous contact with each other. at least some proportion of each other.

^ The idea of one embodiment is that the synchronization means

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käsitt comprise contour surfaces o formed on the first and second press arms with a portion between the pivoting joints. The contour surfaces are interconnected with respect to the clamping arms by means of a separate coupling piece disposed against the contour surfaces. However, the coupling piece is not secured to the clamping arms and the molded surfaces 3 therein. During the synchronization movement, there may be movement between the contour surfaces and the coupling piece.

The idea of one embodiment is that the first clamping arm comprises at least two first 5 coupling necks at the portion between the pivoting joints which are arranged axially spaced from one another when viewed in the direction of the hub. Correspondingly, the second clamping arm comprises, at the portion between the pivoting joints, at least two second coupling jaws spaced axially apart. The first coupling pins and the second coupling pins are overlapped by a portion of the pivot joints. Further, the first and second coupling pins are provided with coupling slots that open towards each other and are arranged to be centered when viewed in alignment so that the coupling slots are arranged to form a coupling beacon viewed from the center. A coupling pin is provided in this coupling jaw, which acts as an intermediate member between the overlapping coupling jaws. The coupling pin moves vertically when the clamping arms are moved. Vertical movement of the coupling pin is permitted by an elongated opening in the body of the holding device or a similar mechanism.

The idea of one embodiment is that the first pu-20 cross arm is fixedly connected with a coupling pin, the outer surface of which acts as the first contour surface. The second clamping arm comprises an elongated coupling opening which acts as a second shaped surface. The coupling pin is disposed through the coupling opening, whereby their contour surfaces transmit synchronization movements between the clamping jaws.

The idea of one embodiment is that the holding device comprises only one actuator disposed between the clamping arms and coupled to simultaneously actuate each clamping arm.

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The idea of one embodiment is that the holding device comprises only one actuator adapted to act only on the first O) ^ 30 press arm. In this case, the synchronization force is transmitted to the second clamping arm lines.

The idea of one embodiment is that the holding device comprises at least two actuators, wherein at least one first actuator is coupled to actuate only the first compression arm and at least one second actuator is adapted to actuate only the second compression arm.

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The idea of one embodiment is that the actuator is a hydraulic cylinder which is connected by a joint to the clamping jaw.

The idea of one embodiment is that the gripping jaws comprise a notch having a substantially 5 V cross-section on opposing surfaces, whereby the gripping jaws can center a drill rod or the like to be pressed therebetween. Due to the design of the jaws, it is also possible to center drill rods and the like of different diameters.

The idea of one embodiment is that the gripping jaws are adapted to move at the same speed of movement, with the same distance of travel and symmetrically relative to each other.

BRIEF DESCRIPTION OF THE DRAWINGS

Some embodiments of the invention will be explained in more detail in the accompanying drawings, in which Fig. 1 is a schematic and side elevational view of a rock-15 drilling rig equipped with booms and a drilling unit fitted thereto, and Fig. 2 schematically showing a drilling rig; Fig. 4 is a schematic and perspective view of the retaining device of Fig. 3 without the base plate; Fig. 5 is a schematic and sectional view of the retaining device of Fig. 2 and Fig. 6; Fig. 7 is a diagrammatic view taken along line D-D of Fig. 2 and Fig. 8 is a schematic view of Fig. 8 and seen from the front of the feeder beam Fig. 9 is a schematic and schematic view of a holding device according to the invention with only one of the compression arms actuated by an actuator, Fig. 10 schematically illustrates an alternative batch 11 is a schematic view of a third alternative rat-5 for synchronizing swinging movement of crank arms by means of transverse elongated openings formed by transverse elongated openings formed in crimping arms, and FIG. with fixed switch-10 field pin and elongated aperture.

In the figures, some embodiments of the invention are shown in simplified form for clarity. Like parts are denoted by like reference numerals in the figures.

DETAILED DESCRIPTION OF THE INVENTION The mining device 1 shown in Figure 1 comprises a movable platform 2 fitted with one or more booms 3. The first boom 3a is a drilling boom and is provided with a rock drilling unit 4. The drilling unit 4 comprises a rock drilling machine 5 7. A tool 8 may be coupled to the rock drill machine 5, which may comprise a plurality of successive drill bars 9 which are secured to one another by means of joints, such as a threaded joint. Further, at the end of the outermost drill rod there is a drill bit 10, the drill studs of which drill a hole 12 in the rock 11. The rock drill 5 may comprise a percussion device for delivering impact pulses to the tool 8 to convey them to the drill bit 10 and further to the breakable rock 11. 8 can be rotated about its longitudinal axis during drilling. The drilling unit 4 may additionally be provided with a rod cassette 13 supported on a feed beam 6. The rod cassette 13 may be provided with extension rods 9 and other drilling tools required for long hole drilling.

The rod cassette 13 is provided with transfer means for drilling tools 30 moves the rod cassette 13 between the bore shaft or center K. The outermost end portion of the feed beam 6 has a holding device 14 with jaws for grasping the tool 9 and centering it in the drilling center K. The jaws can hold the handle or joint of the drill bar 9 to allow it to remain in place when the joints are unscrewed or closed. Further, it is possible to grasp and hold the drill bit 10 with the holding device 35 in situations where it is desired to replace the drill bit 10. In addition to the rod cassette 13, the feed beam 6 may also have a drill bit magazine.

The second boom 3b of the mining device 1 shown in Fig. 1 is provided with another mining tool 15 for handling mining tools 16, such as rock bolts, injection tubes or the like. Again, there may be a need to hold the jaws with the tool. Further, there may also be a need to center the tool at the center of the device K. In this case, also these mining devices 15 may be provided with a holding device 14 according to the invention.

Fig. 2 shows a rock drilling unit 4 with a feed beam 6 10 provided with a rod cassette 13 into which the drill bars 9 required for drilling are stored. At the outermost end of the feed beam 6 is a holding device 14, the possible design alternatives of which are illustrated in more detail in Figures 3-12.

The holding device 14 shown in Fig. 3 comprises a body 17 by means of which it can be secured to a feed beam. Further, the retaining device 14 comprises a first clamping arm 18a coupled to the body 17 by a first pivoting joint 19a and a second clamping arm 18b coupled to the body 17 by a second pivoting joint 19b, with the actuator 20 interposed therebetween the pivoting arms 19 the gripping jaws 21a, 21b at the end move either toward or away from each other 20 depending, of course, on the direction of movement of the actuator 20. The actuator 20 may be a pressure medium cylinder, such as a hydraulic cylinder, which may be coupled to the press arms 18 by means of pivots 22. The gripping jaws 21 may comprise centering surfaces 23 on opposite surfaces thereof, so that when moving toward each other, they may accurately center the intervening drill rod 9 or other tool 25 on the center K. The centering surfaces 23 may be substantially V-shaped in cross section and of course open towards the center K. Of course, other bevelled or conical centering surfaces 23 can also be applied to the gripping jaws 21. The movement of the press arms 18 is made interdependent by means of synchronizing means 24 ^ 30 located on the portion of the pivoting joints 19. Figure 3 shows a coupling pin 25 parallel to the hub K, which | may be included in the synchronization means 24. As shown, the body 17 has an upwardly extending vertical opening 26 which allows the coupling pin 25 to move

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in the vertical direction V of the rubber when the press arms 18 are moved.

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In Fig. 4, part of the body 17 is removed so that the synchronization means ™ 35 are more visible. The first clamping arm 18a may comprise, at the portion between the pivoting joints 19, two or more first coupling pins 27 which are axially spaced from one another when viewed in the direction of the hub K. Correspondingly, the second clamping arm 18b may comprise two or more second coupling pins 28. The coupling pins 27, 28 are overlapped by a portion between the pivoting pivots 19, as shown in FIG. Further, the coupling pins 27, 28 are provided with coupling slots 29 which can open towards each other and are aligned axially so that together they form a coupling pin 30. A coupling pin 25 is disposed in this axial coupling pin 30, which can act as an intermediate member 28. When the clamping arms 18 are moved, the movement of the engaging surfaces of the coupling slots 29 and the coupling pin 25 takes place and, in addition, the coupling pin 25 moves in a linear vertical direction, i.e. it moves towards or away from the hub K. In this embodiment, the surfaces of the coupling shackle 30, which are in contact with the coupling pin 25, act as contour surfaces for the synchronization means 24.

The cross-sectional view of Fig. 5 clearly shows the formation of a coupling beacon 30 between the coupling studs 27, 28. For the vertical movement of the coupling pin 25, elongated openings 26a, 26b are made in the body 17. The cross-sectional patterns 6 and 7 further clarify the construction of this embodiment. Unlike Figures 4 to 7, it may be possible to arrange the coupling slots 29 in closed form 20. The coupling pin 25 is preferably circular in cross-section.

In the embodiment of Figure 8, power is transmitted from the first actuator 20a to the first press arm 18a only, and the force from the second actuator 20b to the second press arm 18b only. The synchronization paths 24 ensure simultaneous movement of the pressing arms 18.

In the embodiment of Fig. 9, power is transmitted from the actuator 20 only to the first clamping arm 18a and the motion is transmitted via the synchronization means 24 to the second clamping arm 18b.

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Fig. 10 is a highly simplified illustration of one embodiment of the synchronization means 24 which includes the gears 31a, 31b formed in the clamping arms 18. The teeth 31 are formed on curved transmission surfaces between the pivoting joints £ 19. In this embodiment, the synchronization movements are transmitted directly by tooth contact, whereby no coupling pin or similar coupling member is required. The teeth 31 function as needed.

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g oscillation as a form element between the pressing arms 18.

Fig. 11 is a highly simplified view of one embodiment of synchronization means 24 including an elongated first coupling opening 32a formed in a first compression arm 8 18a and a second elongated second coupling opening 32b formed in a second compression arm 18b. The clamping arms 18 are overlapped relative to one another by at least a portion of the coupling openings 32. The clamping arms 18 may have corresponding protruding portions of coupling pins 27, 28 or 5 with these overlapping portions. The coupling apertures 32 are arranged transverse to each other, thereby jointly delimiting the coupling shroud 30 having a coupling pin 25. The coupling pin 25 is not fixed to the coupling apertures 32, but can move in the longitudinal direction of the coupling apertures 32 and is moved by applying a pivoting force to the transmission points 22.

Fig. 12 illustrates, in a very simplified manner, another embodiment of the synchronization means 24 having an elongate coupling opening 32 formed in the first compression arm 18a and a coupling pin 25 fixedly secured to the second compression arm 18b. The compression arms 18 are overlapped with each other. The press arms 18 may have coupling pins 27, 28 or corresponding protruding portions with these overlapping portions. When the clamping arms 18 are rotated by the actuator 20 relative to their pivots 19, the coupling pin 25 moves along an arcuate track and at the same time changes its position in the coupling opening 32. Further, it is possible that the coupling cam 27 comprises a slot coupling opening 32 which In this embodiment, the outer surface of the coupling pin 25 and the edges of the coupling opening 32 act as contouring surfaces for synchronizing movement.

In the embodiments of Figures 3 to 7,11 and 12, the coupling pin 25 shown here is disposed between the overlapping portions and is adapted to apply substantially only shear forces. The coupling pin 25 may then be relatively thin and still be capable of transmitting even large forces between the clamping arms 18. The embodiments of Figures 3-7 and 11 have a separate ™ 30 coupling pin 25 that is easy to remove and replace.

It should be noted that the opening movement of the gripping jaws 21 of the retaining device 14 according to the invention can be arranged large enough to grip both the handle 9 of the drill rod and between the successive drill rods 9.

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o the coupling sleeves. It can also grip the drill bit 10 or any of the ™ 35 mining tools.

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As used in this application, the vertical direction or vertical motion refers to the vertical direction relative to the basic position of the feed beam and holding device, in which position the feed beam is placed in a horizontal position. Of course, when the boom and the feed beam are turned during operation 5, the position of the holding device also changes. Although the absolute direction changes, the retaining device still retains its relative position relative to the feed beam.

In some cases, the features set forth in this application may be used as such, despite other features. On the other hand, the features disclosed in this application may be combined, if necessary, to form various combinations.

The drawings and the description related thereto are intended only to illustrate the idea of the invention. The details of the invention may vary within the scope of the claims.

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Claims (8)

A method of using a pouring device belonging to a mining device, the pouring device (14) comprising: a body (17); a first pendulum arm (18a) and a second pendulum arm (18b) pivoted to the body 5 (17); gripping jaws (21a, 21b) at the outer ends of the pendulum arms (18a, 18b); and at least one actuator (20); in which method: the pendulum arms (18a, 18b) are pivoted by means of the actuator (20) in relation to their pivots (19a, 19b), whereby the gripping jaws (21a, 21b) move towards each other and in a corresponding manner away from each other depending on the direction of movement of the actuator (20); a tool (9) in the center (K) of the mining device (4, 15) is gripped by the gripping jaws (21a, 21b) to centralize it and pour it into the center (K); the pendulum arms (18a, 18b) are connected to each other by means of separate mechanical synchronizing means (24), the movements of the pendulum arms (18a, 18b) being interdependent and the gripping jaws (21a, 21b) moving simultaneously and symmetrically; forming means are arranged in the pendulum arms (18a, 18b) at the section between their pivot points (19a, 19b); and the movement between the first pendulum arm (18a) and the second pendulum arm (18b) is synchronized by means of the forming means in the two directions of movement of the pendulum arms, characterized in that at least one section (27) of the first pendulum arm (18a) and a section ( 28) of the second pendulum arm (18b) is arranged to be about lots and mold surfaces (29; 32a, 32b) in the form of openings in the sections which are about the lot being arranged to coincide; and οό the movement between the pendulum arms (18a, 18b) is conveyed by means of ^ a coupling pin (25) in the direction of the center (K), which coupling pin is in contact with the mold surfaces of the pendulum arms (18a, 18b). A method according to claim 1, characterized in that a transverse movement is allowed for the coupling pin (25) in the vertical direction S as the pendulum arms (18a, 18b) move. § 3. Flap device comprising: (M 35 a frame (17) by means of which the pouring device (14) can be attached to a mining device (4, 15) feeding beam (6); a first pendulum arm (18a), which is connected by means of of a first pivot (19a) to the body (17), and a second pivot arm (18b) coupled by a second pivot (19b) to the body (17); 5 gripping jaws (21a, 21b) arranged on the outermost end portions of the pendulum arms (18a, 18b); at least one actuator (20) for moving the pendulum arms (18a, 18b) relative to the pivot rings (19a, 19b), whereby the gripping jaws (21a, 21b) can be moved and mechanical synchronizing means (24) which are separate from the actuator (20) for coupling the movement of the first pendulum arm (18a) and the movement of the second pendulum arm (18b) to be dependent on each other, and the synchronizing means (24) of the pouring device (14) is arranged on the section between the first and the second pivot (19a, 19b); And wherein the synchronizing means (24) comprise molding means formed in the first and second pendulum arms (18a, 18b) and arranged to mediate the synchronizing movements between the pendulum arms (18a, 18b) in the two directions of movement of the pendulum arms, characterized in that the first the pendulum arm (18a) and the second pendulum arm (18b) are, at least, at least part of the mold surfaces (29; 32a; 32b); the mold surfaces (29; 32a, 32b) define a coupling channel (30); and that a coupling pin (25) is arranged in the coupling channel (30), which coupling pin (25) is arranged to mediate the movement between the mold surfaces (29; 32a, 32b) of the pendulum members (18a, 18b). 4. A pouring device according to claim 3, characterized in that the first pendulum arm (18a) comprises at least two first coupling chambers (27), which are arranged in the section between the pivot rings (19a, 19b). ranked at an axial distance from each other; CD ™ 30 that the second pendulum arm (18b) comprises the section between the pivot | the rings (19a, 19b) having at least two other coupling chambers (27) arranged at an axial distance from each other; CO 2 that said first coupling chambers (27) and second coupling chambers (28) are arranged to be about lots; 35 that the first coupling chambers (27) and the second coupling chambers (28) are provided with coupling cutters (29) which open to each other and arranged to coincide, so that the coupling cutters (29) are arranged on opposite sides to forming an axial coupling channel (30); a coupling pin (25) is arranged in the coupling channel (30), said coupling pin being arranged to act as an intermediary between the first and second coupling combs (27, 28); and that the coupling pin (25) is free to move in the vertical direction as the baffle arms (18a, 18b) are moved. Pouring device according to claim 3, characterized in that the first pendulum arm (18a) comprises on the section between the pivots (19a, 19b) a coupling pin (25) in the direction of the center (K), which coupling pin (25) is fixedly movable to the first pendulum arm (18a); the second pendulum arm (18b) comprises the ρέ section between the pivot rings (19a, 19b) an oblong coupling opening (32); and that the coupling pin (25) is arranged through the coupling aperture (32), whereby they act as forming means and mediate synchronization movements between the pendulum arms (18a, 18b). Pouring device according to any of the preceding claims 3-5, characterized in that the pouring device (14) comprises only one actuator (20) arranged between the pendulum arms (18a, 18b) and coupled to directly actuate the pendulum arms (18a). , 18b). Pouring device according to any of the preceding claims 3-5, characterized in that the pouring device (14) comprises only one actuator (20) arranged to actuate only the first pendulum arm (18a), the second pendulum arm (18b) being arranged to move, influenced by the synchronization means. CM 8. A pouring device according to any one of the preceding claims 3-5, characterized in that the pouring device (14) comprises at least two actuators | (20a, 20b), wherein at least one first actuator (20a) is coupled to directly actuate only the first pendulum arm (18a), and at least one second CO actuator (20b) is arranged to directly actuate only the second pivot arm (18b). "35