DE1248591B - Triangular ground chisel for coal planes or similar mining machines - Google Patents

Description

THE REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

248 591 Int. Cl .:

E21 C 27/44

E 21 c

German KL: 5b -27/44

Number: 1248 591

File number: S 103572 VI a / 5 b

Filing date: April 30, 1966

Opened on August 31, 1967

Triangular ground chisel for coal planers or the like. Extraction drilling machines in mining operations are known in various embodiments. They essentially consist of one on the extraction machine attached chisel body pointing to the horizontal as well as to the coal face with exchangeable, carbide-tipped chisel head. In the known embodiments, the chisel body is mostly pyramid-shaped and set up with a cone or the like for the angle ίο adjustable connection to the plane body, the chisel head designed as a point. Most of the time the chisel head is coated with hard metal armored. The pointed formation of the known chisel heads does not lead to a real one Cutting work, but rather to tearing away the coal or the lying. That affects the desired leadership role. In particular with hard coal and soft adjacent rock, there is often a Observe penetration of the chisel heads into the sole, while with soft coal and overgrown Side rock a climbing of the coal plow on the coal face in the direction of the hanging wall is watching. The soldered-in hard metal plates themselves often break out observed after only a short operating time. This fact leads to disadvantageous business interruptions, especially since changing the ground chisel is time-consuming in the known embodiments and is awkward.

In order to avoid this disadvantage, according to an older proposal by the applicant (German Auslegeschrift 1 233 355) has been provided, the chisel head to the chisel body by means of conical Insertion shaft with the axis running essentially in the working direction and the associated conical Insertion to connect. On the conical part of the insertion shaft and the insertion hole each is followed by a cylindrical part, and these parts are assigned to one another Bores provided for inserting a heavy duty dowel pin. With such a structure there is possibly the possibility that due to manufacturing tolerances or under the operating conditions the heavy-duty clamping pins are subject to shearing stress due to their arrangement and suffer minor deformations. However, this makes it difficult to change the chisel head.

The invention has for its object to provide a triangular bottom chisel of the type described above Structure for coal planer od. Like. Extraction machines in the simplest way so that Triangular ground chisel for coal planes

or similar extraction machines

Applicant:

Societe des Poudres Metalliques et des Alliages

Speciaux Ugine-Carbone, Paris

Representative:

Dipl.-Phys. Dr. W. Andrejewski, patent attorney,

Essen, Kettwiger Str. 36

Named as inventor:

Karl-Heinz Wetzchewald, Kettwig / Ruhr

under all circumstances the chisel head is attached to the chisel body in such a way that it is easily replaceable that it is not endangered by the stresses that occur. In particular, a construction be created, especially the use of hard metal plates for long service lives and ensures real cutting work.

The invention relates to a triangular ground chisel for coal planers or the like mining machines in mining operations from chisel bodies oriented towards the horizontal and towards the coal face with exchangeable, carbide-tipped chisel head, with the chisel head attached to the chisel body by means of a conical plug-in shaft with an axis running essentially in the working direction and associated conical insertion hole is connected. The invention consists in that the chisel head by means of a guide groove running orthogonally to the axis of the insertion shaft with an associated guide groove Guide spring is also connected to the chisel body and the insertion shaft offset at its rear end with a lateral, elongated recess or cutout and the chisel body with an associated bore tangent to the chisel shank for a Adapter sleeve is provided. The guide springs on the chisel head and in the chisel body are useful arranged the guide groove. With such a structure, the insertion shaft can, as it were, from the Grow out guide spring. A special proposal of the invention is that the guide spring is arranged on the chisel head against the working direction of the ground chisel. In which

709 639/16

Ground chisel according to the invention can be the hard metal armor be designed in different ways. Training is particularly advantageous with an L-shaped hard metal fitting with one leg facing the horizontal, one leg arranged on the coal joint side and provided the chisel head with the associated free cut angles is. This form of training allows a clear and clean cutting, so that in connection The guide on the conveyor prevents the planer from getting lost. You can go here without further ado work with soldered-on hard metal plates that absorb all stresses. A special Embodiment of the invention is in this context that the hard metal assembly formed in two parts (i.e. composed of two small plates) and one part is attached to the part provided with a rounding in the area of the cutting corner. Appropriate is also the chisel head at its rear associated with the rounded cutting corners Part provided with a bar that bounds the guide groove across the wall. Furthermore can in the area of the end of the chisel shank there is an orthogonal to the insertion hole in the chisel holder Bore for a drive wedge can be provided. Furthermore, there is in the structure according to the invention Possibility to close the chisel shank with an axial bore through the entire chisel head Mistake. The chisel head and possibly the front part of the chisel holder with a bevel running at a small distance from the free legs of the hard metal fitting Mistake. The overall construction of the chisel head can be made so that at least the Rounded cutting corner of the chisel head over the chisel holder, taking into account the clearance angle is preferred.

The advantages achieved by the invention are primarily to be seen in the fact that in the case of the invention Embodiment of the chisel head is easily replaceable attached to the chisel holder itself. The overall arrangement has been made so that for holding the chisel head on the chisel holder Adapter sleeves can be used, which are due to practically any loads the structural design of the connection between the chisel head and chisel holder are free. Of the Clamping sleeve therefore only has a holding function. Nonetheless, all occurring Stresses derived from the chisel head in the actual chisel shaft. from Of particular importance is the fact that the chisel head is easy to use in the construction according to the invention can be provided with a hard metal tipping, whereby in connection with the overall construction long service lives of the carbide tipping are guaranteed. In addition, the chisel head easily replace it yourself, so that the carbide tipping and in particular the clearance angle, can be reworked at any time. Of particular importance is the fact that through the special design of the angular cutting edge a clear leadership of the Triangular ground chisel and thus the entire coal plow is guaranteed. The inventive Execution thus leads to a significant reduction in lost and non-productive times.

In the following, the invention is illustrated by means of an exemplary embodiment Drawing explained in more detail. It shows

F i g. 1 a triangular ground chisel in a perspective view with a welding adapter piece,

F i g. 2 the chisel head with welding neck adapter on an enlarged scale,

F i g. 3 shows the view of the object according to FIG. 2

ίο in the direction of arrow A,

F i g. 4 shows a section through the object according to FIG. 2 in the direction of arrows BB and

F i g. 5 shows a plan view of the object according to FIG. 4.

The triangular ground chisel shown in the figures is for a coal plow or the like determined in mining operations. It essentially consists of a lying down as well as the chisel body oriented towards the coal face with an exchangeable, carbide-tipped one Chisel head 2. In the embodiment shown, the chisel head 2 is attached to the chisel body 1 on the one hand by means of a conical plug-in shaft 3 with essentially extending in the working direction Axis and associated conical insertion hole 4 and on the other hand by means of orthogonal to the axis of the insertion shaft 3 extending guide groove 5 and associated guide spring 6 connected. In the embodiment shown, the guide spring 6 is provided on the chisel head 2 and the guide groove 5 is arranged in the chisel head 1. For this purpose, the plug-in shaft 3 is, as it were formed growing out of the guide spring 6. Otherwise is in the illustrated embodiment the guide spring 6 arranged on the chisel head 2 running parallel to the coal face ^ In the embodiment shown, the hard metal assembly 7, 8 has an L-shaped shape. For this purpose, one leg 7 is arranged to lie on the ground and the other 8 is arranged to face the coal face. Of course, the chisel head 1 is provided with the associated clearance angles so that regrinding can be carried out at any time. As the F i g. 3 reveals is the hard metal fitting formed in two parts and one part 7 to the one in the area of the cutting corner with a rounding 9 provided associated part 8 attached. In addition, the Meißeikopf 2 at its the Rounded cutting corner associated Rückwärtsgen part a the guide groove 5 delimiting wall 10 overarching bar 11. The F i g. 5 shows that the Einsteckschaf13 on his stepped rear end and provided with a lateral elongated recess or Ausfräsungl2 is. The chisel body 1 is also associated with an associated one that is tangent to the chisel shank 3 Bore 13 is provided for a clamping sleeve 14. The clamping sleeve 14 thus only serves to hold the chisel head to be attached to the chisel body so that it cannot be lost.

Due to the elongated recess 12, it does not have to absorb any stresses. Deformations the same are therefore practically impossible and can thus be replaced quickly and easily of the chisel head 2 to. Furthermore, in the area of the end of the chisel shank, there is one orthogonal to the Insertion hole 4 in the chisel head 1 extending hole 15 for a drive wedge, which is not is shown, provided. About this driving wedge

the removal of the chisel head is to be facilitated in a manner known per se. Furthermore the chisel shank is provided with an axial bore 16, which also passes through the associated part of the Chisel head 2 is carried out. The chisel head 2 and the front part of the chisel body 1 are at the illustrated embodiment with a small distance to the free legs of the Carbide tipping 7, 8 running bevel 17 is provided. The rounded cutting corner or the Rounding 9 is designed in such a way that it is preferred over chisel head 2 and also chisel body 1 is. In the embodiment shown, the chisel head 2 is not directly on the chisel body 1 attached, but on a pre-weld transition piece provided between the chisel body and chisel head2 18. The guide groove 5 is located at the end of this pre-welding transition piece and insertion hole 4 with the associated holes 13 and 15 for the clamping sleeve 14 and an ao Driving wedge arranged. This has the advantage that, for. B. if the Insertion hole or guide groove 5 does not have to discard the entire chisel body 1, but only a new pre-weld transition piece is arranged on the chisel body or vice versa will.

Claims (11)

Patent claims: 1. Triangular ground chisel for coal planer or the same extraction machines in mining operations for horizontal and coal pumping Chisel body oriented towards the direction with exchangeable, carbide-tipped chisel head, whereby the chisel head to the chisel body by means of a conical insertion shaft with essentially in The working direction of the running axis and the associated conical insertion hole are connected, characterized in that the chisel head (2) by means of a guide groove extending orthogonally to the axis of the insert shank (3) (5) with associated guide spring (6) is also connected to the chisel body (1) and the insertion shaft (3) set off at its rear end and with a lateral, elongated recess or milling (12) and the chisel body (1) with one with the chisel shank (3) is provided tangential associated bore (13) for a clamping sleeve (14). 2. triangular ground chisel according to claim 1, characterized in that the guide spring (6) provided on the chisel head (2) and the guide groove (5) is arranged in the chisel body (1). 3. triangular ground chisel according to claims 1 and 2, characterized in that the insertion shaft (3) grows out of the guide spring (6). 4. triangular ground chisel according to claims 1 to 3, characterized in that the guide spring (6) is arranged on the chisel head (2) against the working direction of the ground chisel is. 5. triangular ground chisel according to claims 1 to 4, characterized in that the hard metal assembly (7, 8) L-shaped with one leg to the carbon joint and one Legs arranged to lie on the floor and the chisel head (2) with the associated free cut angles is provided. 6. triangular ground chisel according to claims 1 to 5, characterized in that the hard metal assembly is designed in two parts and one part (7) is attached to the in the area of the Cutting corner with a rounding (9) provided associated part (8) is attached. 7. triangular ground chisel according to claims 1 to 6, characterized in that the chisel head (2) on its rear part associated with the rounded cutting corner a wall (10) extending across the guide groove (5) is provided. 8. triangular ground chisel according to claims 1 to 7, characterized in that in the area of the end of the chisel shank an orthogonal to the insertion hole (4) in the chisel body (1) Bore (15) is provided for a drive wedge. 9. triangular ground chisel according to claims 1 to 8, characterized in that the chisel shank (3) is provided with an axial bore (16). 10. triangular ground chisel according to claims 1 to 9, characterized in that the chisel head (2) and possibly the front part of the chisel body (1) with a small Distance to the free legs of the hard metal 'tipping (7, 8) running bevel (17) is provided. 11. triangular ground chisel according to claims 1 to 10, characterized in that at least the rounded cutting corner of the chisel head (2) pulled forward over the chisel body (1) is. Considered publications:
German utility model No. 1921014. 1 sheet of drawings 709 639/16 8. 67 © Bundesdruckerei Berlin