DE2330297A1 - TOOL ARRANGEMENT FOR MINING DRIVING AND MINING MACHINERY - Google Patents

Description

Tool arrangement in mining tunneling or mining machines

The invention relates to a tool assembly for mining tunneling or mining machines. The tools used are rod-like, three-dimensional chisel picks, which are fitted with a hard metal tip are provided. These chisel picks are rotatable but not axially displaceable in a corresponding bore of a holding block, so that the working tip of the chisel comes into engagement with the rock or mineral formation during operation.

There are already mining machines of different types, which Have tool assemblies of this type, in particular mining machines known, which have a rotating drum (cutting drum) moved in the propulsion direction, which are distributed on their circumference and radially of this type Have tool assemblies.

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The invention is based on the object of such a tool arrangement to create that can be easily and quickly adapted to different conditions, on the one hand to different conditions in use with one and the same machine and on the other hand with different tunneling machines .. The exchange should of worn scraper chisels or picks as quickly as possible and simply done in order to be able to easily replace worn picks and to be able to change the 'rock formation' in each case to be able to use suitable picks or tools quickly. So there should be pecking at one and the same mining machine - resp. Whole bit holders - can be exchanged quickly or exchanged for different bit or bit holders. Great importance is attached to a simple, robust structure. The solution to this problem is essentially that the holding block (16,81,90,110,120, i ¥ f, 152,182) into which the pick is inserted is, a downward extending rib (80, 1 * f2, 150, I80) which is received by a bearing block (12, 14; * t2; I70), wherein a hinge pin (26) extends transversely through the rib and bracket, and wherein cooperating stop members (32, 3 &;36; 178) at the rear end of the bracket and the bearing block are provided via which the workload is transferred from the block to the bearing block.

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For a better understanding of the invention, embodiments are given below.

Describe examples using the drawing, with essential Features and configurations are best only in context are to be described with the drawing.

Figure 1 shows a first Ausführungsbexspiel in side view, partially axially cut.

FIG. 2 is a front view of the embodiment of FIG.

Figure 3 shows in partial section on a larger scale the holder of the Tool in the saw block by means of pins.

Figure h shows a modification of the holder, namely by means of a spring ring.

FIG. 5 shows a diagrammatic view of such a spring ring.

Figure 6 shows a modified Ausführungsbexspiel, axially ge; cut.

Figure 7 shows - in the same way of representation, i.e. also axially: cut, another modification, specifically for heavy-duty use.

Figure 8 shows a modification of the embodiment of Figure 1 such that ' the chisel point has a smaller distance from the support member, for example the cutting tool, than in FIG. 1.

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When executing according to

FIG. 9 the chisel is inserted directly into a receiving block, so without inserting a sleeve.

FIG. 10 shows, in perspective, partially broken away, an embodiment of the trestle, which is firmly attached to a cantilever arm, Sehrämtronnsel Od. Like. Seats and pivotally carries a chiseled receiving block.

FIG. 11 shows - partially in section - a receiving block similar to that in FIGS. 8 and 9, but the tool being locked by means of a pin instead of a spring ring.

A cutting drum 10 is indicated in FIGS. 1, 2 and 8. the Cutter drum 10 can be driven in the clockwise direction and at the same time can be driven forward from left to right. Instead of the cutting drum Another tool carrier of a mining driving machine can of course also be provided.

On the cutting drum 10 are axially and circumferentially distributed bearings i

Bocke 12, Ik provided, in particular angecfawäst. The bearing blocks each consist of two plates 12, Λk _i which are welded to the drum 10 parallel to and at a distance from one another in the circumferential direction. A holding block 16 is pivotably mounted in each of the bearing blocks 12, Ik. In fact, the bearing block 16 engages with a rib 18 between the two plates 12, Ik , whereby mutually aligned

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Tete holes 22 »24 are provided in the plates 12, 14 and hole 20 in the cradle 18, through which a hinge pin 26 is inserted, which is locked by means of spring washers 28, which are inserted in grooves on the protruding Eaaen of the hinge pin 26 and against the outsides of the plates 12, 14 bear.

The bottom 30 of the hip 18 ends relatively close to the Troiaael 10. At the rear end is the clan 18 with a sloping backwards inclined stop surface 32 provided, which ax an Aneehlagglied 36 works together, which between the two plates 12, of the bearing block is welded.

The part 38 of the holding block 16 located outside and above the hip 18 is significantly wider than the rib 18 (see FIG. 2). This block part 38 has downwardly directed pupils 40 which work together with the upper end faces 42 of the plates 12, 14; of the bearing block. The block part is therefore supported over the shoulder 40! 38 on the plates 12, 14, while the stop surface 32 at the rear end of the rib 18 has a counter stop 36. j

The cutting tool is inserted into the holding block 16. In fact the holding block 16 has a bore 46 which is inclined obliquely upwards which is perpendicular to the obliquely rearwardly inclined end face of the block part 38. The axis of the bore 46 deviates or is inclined with respect to the surface of the drum 10 when it is rotated and moved in the working direction.

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The bore kB has a front part with a larger diameter 48 and a rear part 50. Between the larger and the smaller diameter, a shoulder 52 that widens outward upward is formed. A sleeve member 5k is inserted into the bore ko , which - corresponding to the bore - has a further front part and a narrower rear part 56,58, the sleeve also having a shoulder 60 which corresponds to the shoulder in the receiving bore.

The front end of the sleeve 5k protrudes out of the bore k6 with a radial circumferential surface 62 which may rest against the end face of the block part 38 or - as shown here - is arranged at a distance therefrom. According to Figure 1, the sleeve 5 ^ extends completely through the block part 38 and is rotatably held therein by a holding member in the form of a spring ring 6k, which is provided in a groove at the rear end of the sleeve. The sleeve 5k has a bore 66 for receiving the shank 68 of a tool (chisel or cutting pick), the working part 70 of which extends outwardly and is provided with a wear-resistant tip 72, for example made of tungsten carbide.

From the transition between the shaft part and the working part 70 is a

7k '

Conical seat provided which rests in a corresponding, conical counter surface of the bore 66 of the sleeve. The shaft of the tool 70 has an engaging groove 6 in which an annular, resilient retaining element 78 is seated, which has at least one radially protruding part which engages in a groove 80 in the bore 66 of the sleeve 5k.

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The sleeve 5% is rotatably held in the holding block and the tool? 0 is rotatably held in the sleeve. The force acting on the tool 70 in the grief, which runs essentially in the axial direction of the tool, is transferred from the tool 70 via the aforesaid conical seat surfaces to the sleeve $ k and from this finally via the aforesaid conical seat surfaces 52, 60 on the Retaining block 16 transferred. Finally, the loads are transferred from the holding block 16 to the bearing pin 26 and the stop surfaces 32, 3 ^.

Since the tool 70 can be exchanged quickly in the sleeve and furthermore the sleeve can be exchanged quickly in the block and finally the block can also be exchanged quickly in the bearing block 12, the machine equipped in this way can be quickly adapted to different conditions and they can be in operation practically all the time. This is particularly important for mining machines, since these, especially their tools, are exposed to very rapid wear, whereby the point in time at which the tools have to be replaced due to wear and tear is usually unpredictable because the hardness of the rock in which the work is being carried out changes rapidly. Under certain circumstances, the tools can very quickly wear out or \ even break. It is then very important that the tools are quick; and can be easily exchanged so that you can continue working without long downtimes. As will be discussed in more detail below, the connection of the tools to the support member of the mining machine is of great importance, since many variations in the arrangement of the working tip of the tool with respect to the tool carrier are possible

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Machine quickly and easily to different working conditions is adaptable and with which furthermore the tool arrangement can be adapted to different types of tunneling machines.

According to FIG. 1, the sleeve is held in the holding block by means of a spring ring Gk, but other holding means can also be provided. For example, in FIG. 3 there is a. Block 81 is provided with a two-stage bore 82 in which two-stage bore the sleeve is held. To lock the sleeve 84 rotatably in the block 80, the narrower end of the sleeve has a king groove 86, while a hole extends transversely through the block, which is aligned with the groove 86. A pin 88 pushed through it thus holds the sleeve Sk rotatably in the receiving bore 82 of the block 81.

In FIG. K , the block 90 has a two-stage bore 92, a conical shoulder being provided between the two stages of the bore, for receiving the corresponding two-stage sleeve 9k. The narrower part of the sleeve 9k has a fairly wide flat annular groove 96 in which a resilient slotted sing 98 sits, which has protruding bulges 100 which engage in a corresponding annular groove 102 on the bore 92 of the sleeve 90. The resilient retaining ring 98 is in Figure 5 shown in perspective. It consists of a strip of resilient metal (spring steel), slightly curved in cross-section and slotted, whereby it has protruding parts 100 that are pressed out.

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According to FIG. 6, the block 110 has a through hole 112 in which rotatably has a sleeve 11 * 1 with a radial flange 116 at its front end, which comes to rest against the end face of the block. The sleeve 11 ^ can be held in the block in one or the other of the aforementioned ways. A spring ring 118 is shown at the rear _{end protruding from} the block 110. The above embodiments had a sleeve in which a tool or pick-shaped chisel is rotatably inserted. However, particularly in hard rocks, more hot picks are often required than could be accommodated in a sleeve. Such a tool is shown in FIG. 7, where a block 120 is provided with a two-step bore 122 which holds a pick with a larger front diameter and a smaller rear diameter. Between the two parts with different diameters, an inclined shoulder is again provided on the block 120 and accordingly also on the pick 12 * l. The chisel pick 12 * f is held in the block 120 by one of the means described above; In Figure 7, spring washers 126 are again provided in a groove at the rear, protruding end of the pick 12 ^. The pick has a conical end 128 into which a metal tip 130, which is larger than that of FIG. 1, is inserted.

A feature of the invention is that the dimensions of the chisel body 12 * f according to Figure 7 and the corresponding Aüfnahaebohrung 121 are such that the picking chisel 12k can be exchanged at any time for a sleeve ax inserted smaller pick ]

- 10 - y

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according to Figure 1 - and vice versa. This exchange option allows the tunneling machine to be quickly adapted to heavier rock formations - and vice versa.

FIG. 8 shows an arrangement similar to that of FIG. 1, corresponding Parts such as drum 10 bearing block 12 are provided with the same reference numerals. The chisel and the sleeve are essentially the same of Figure 1, but the holding block which connects the sleeve to the bearing block 12 is different.

The holding block according to Figure 8 has a 2-lip part 1 ^ -2, arranged between the plates of the bearing block 12, and a protruding part iMt fflit a bore for receiving the sleeve, but this protruding part ikk is shifted to the rear end of the hip 1 ^ 2 . In this way, the chisel tip 72 has a smaller distance from the cutting drum.

Figure 9 shows a retaining block 150 of roughly the same shape, however is on the protruding part 152 a hole 15 ^ for receiving the Shank part I56 of a pick I5S. (So as far as similar to Figure 6) The bore 15 ^ has a groove 160, while on the shaft of the pick a resilient retaining ring 162 is provided in a corresponding groove, which engages in the groove, thus making the pick rotatable in the Bore is held.

Figure 10 shows a modification of the bearing block, the feet BSW. Plates 1? 2, 17 * l · are in one piece with a base part I76. Arranged between the feet and on the base is the stop element I78,

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which preferably over its entire rear edge extension is welded to the bearing block.

FIG. 11 shows a block 180 similar to that of FIG. 8, but with the protruding part 182, which in turn leads to the rear end of the Tip 18 ** is offset towards a bore 186 for receiving the shaft 18O has a chisel pick 190, the chisel in the bore by means of a transversely inserted pin 152 is held, the Shank has a corresponding annular groove 19 * f. This type of bracket thus corresponds to that of Figure 3

It is in the nature of the invention that many modifications are possible.

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Claims (1)

Claims 1. Tool arrangement in a mine tunneling machine with a chisel pick running out in a point, which is held rotatably but not axially movable in a bore of a holding block, characterized, that the retaining block (16, 81, 90, 110, 120, iMf, 152, 182) into which the pick is set has a downwardly extending rib ($ 0, 1 ^ 2,150, 180) which is supported by a Bearing block (12, lh; k2-, I70) is received, with a hinge pin (26) extending transversely through the rib and the bearing bracket, and wherein the cooperating stop elements (32, 3 * 5 ·; 3ό; 178) on rear end of the rib and the bearing block are provided, via which the work load is transferred from the block to the bearing block. 2. Device according to claim 1,
characterized, that the chisel pick (? 0, 12 ^, I58, I90) is rotatably held, by means of a resilient ring or clip (78, 98, I62). 3 device according to claim 1 or 2,
characterized, that a sleeve (5 ^, 84, 9 ^, 11 * t) rotatable in a corresponding Bore of the holding block is held, in which sleeve, in turn, the chisel pick is rotatably held. - 13 - 309882/0567 H. Device according to Claims 1 to 3, characterized in that surfaces on the clasp and on the bearing block in mutually facing mutual relationship and inclined with respect to the chisel axis are provided as cooperating stops. 5. Device according to claims 1 to * f, characterized in that the rib (1 ^ 2, 18O) extends from below the holding block extends forward. 6. Device according to claims 1 to 5, characterized in that the bearing block has a pair of mutually parallel feet (12.1 * t; 1 ^ 2, having. 7. Device according to claim 6, characterized in that that the feet (1 ^ 2,17 * 0 are integral with a base part (17 $. 8. Apparatus according to claim characterized in that the underside of the base part (176) is concave. 9. Device according to claims 1 to 8, characterized in that the top of the bearing block is inclined backwards and downwards 309882/0567 that the holding block has corresponding, overlapping shoulders (^ 0). 10. Device according to at least one of the preceding claims, characterized in that the holding block has a block part (38, 81, 90, 110, 120, iMf, 152, 182) with a bore (^ 8, 82, 93, 112, 122, 15 * f, I86) into which a Chisel - or sleeve for a picking chisel - is used, and that from the lower part of the block part provided with the receiving bore a rib (18, 1 ^ 2, 150, 180) protrudes downwards, which extends forward and backward with respect to the holding part. 11. The device according to claim 10, characterized in that the rib has a bore 20 in a front region and one Has stop surface (32) at its rear area or end. 12. The device according to claim 11, characterized in that the stop surfaces (32, 3 * 0 opposite the axis of the pick are inclined. 13. Device according to claims 10 to 12, characterized in that the holding block 16 has flange-like shoulders (k0) pointing downwards. 30988 2/0 5 Device according to at least one of the preceding claims, characterized in that that the receiving hole in the holding block (16) and accordingly the sleeve (56) in two stages with a front part with a larger one Diameter and a rear part with a smaller diameter, with a conical Bing shoulder between the two parts (52, 60) is provided. ■ J0 9B ' Jt OB 67