DE1233809B - Extraction tool for the extraction of coal, especially planing chisels - Google Patents

Description

NDESREPUBLIK DEUTSCHLAND GERMAN 4057XW PATENT OFFICE

EDITORIAL

Int. Ο .:

E 21 c

E21C 27/44

German KJ .: 5b -27/44

Number: 1 233 809

File number: G 43968 VI a / 5 b

Filing date: June 24, 1965

Opened on: February 9, 1967

The invention is concerned with an extraction tool for the extraction of coal, in particular Planing chisel, with a cutting part that is detachably connected to the tool carrier and that has clamping sleeves od. The like. Is captively connected to the tool carrier.

In the previously known devices, the detachably connected to the tool carrier overcomes Cutting part either a pocket-like extension on the tool carrier, or the actual cutting part covers a bar on the tool carrier with a fork-like extension and is here on clamping sleeves attached. These embodiments are suitable as long as the restoring forces from the coal impact with a chisel position approximately parallel to the horizontal one without the effect of twisting moments be guided onto the cutting part in the shaft. Will be provided with detachable cutting caps Extraction tools, d. H. Cutting part with tool carrier of the known embodiment for the purpose of controlling the extraction device pivoted relative to the extraction device, d. H. adjusted like a rudder to the lying or hanging wall, so are in the tip of the extraction tool, d. H. In the cutting part, forces are introduced that twist the cutting part against the tool carrier and cause the connection to be destroyed in the foreseeable future. Naturally, the Tool carrier affected, so that both parts to be connected to one another are renewed Need to become.

The object of the invention is the connection between the cutting part and the tool carrier so to train that it is suitable, even with a deviating from the normal position of the Extraction tool opposite the lying or opposite the coal face to be transferred Absorb forces. The invention makes use of a form of connection such as that used in chain connecting links Has been state of the art since 1952, but was not an obvious choice for connecting individual parts of mining tools because the normal course of the impact on the tool carrier from the coal face via the cutting part Reaction forces will lead those skilled in the art to embodiments of connections such as those in extraction tools with a detachable cutting part are state of the art.

The invention solves the problem posed in an extraction tool for the extraction of coal, in particular in the case of a planing chisel, with a tendon egg extraction tool, which is detachably connected to the tool carrier, for extraction of coal
Coal, especially planing chisels

Applicant:

Westfalia Ironworks Union,

Wethmar near Lünen

Named as inventor:
Christoph Rassmann, Lünen;
Alois Hauschopp, Werne;
Berthold Ostrop, SeIm

the part, which od via clamping sleeves. The like. Is captively connected to the tool carrier in that the cutting part has a recess on the end face directed towards the tool carrier, which semicircular and form-fitting a provided with a collar, rivet head-like approach of the tool carrier includes and overridden in such a way that parts of the cutting part engage behind the federal government. According to the invention proposed semicircular and form-fitting system ensures good power transmission, while the cutting edge parts engaging behind the collar cause the cutting edge part to lift off from the Prevent tool carriers even under extreme stress.

According to a further feature of the invention, the cutting part engages at its rear in the direction of travel End with a strip-like extension in a groove of the tool carrier. This is according to the invention one extending through the strip-like extension of the cutting part and the tool carrier Bore is provided into which a clamping sleeve can be driven in a manner known per se. the Clamping sleeve only serves as a captive connection between the two parts, it is not used for Power transmission.

According to a further feature of the invention, the end face directed towards the tool carrier forms of the cutting part the offset-side delimitation of a plate-like extension, which is directly related to the with the coal face engaging chisel point forms a cross-sectionally T-shaped profile. The plate-like extension causes the cutting part to rest over a large area on the tool carrier, so that only a low surface pressure is given even when peeling in hard coal.

709 508/16

F i g. 1 shows an extraction tool in one embodiment seen after the solution according to the invention from the coal face;

F i g. 2 shows the embodiment according to FIG. 1 seen from above;

Fig. 3 shows the section AB according to Fig. 1;

F i g. 4 shows another embodiment in a plan view;

F i g. 5 shows the section along the line AA according to FIG. 4; ίο

F i g. 6 shows a side view according to FIG. 4th

The embodiment according to FIG. 1 and 3 shows the tool carrier 2 with the hint Cutting part 1. The cutting part 1 has a recess on the end face 3 facing the tool carrier 2 4, into which a rivet-head-like projection 6 of the tool carrier 2, which is provided with a collar 5 borders. The recess 4 comprises the semicircular surfaces 16, 17 of the collar 5 and the approach 6 form-fitting. The parts 7 of the cutting part 1 engage behind the collar 5 and prevent it Lifting the entire cutting part 1 from the tool carrier 2.

At the rear end 8 of the cutting part 1 in the direction of travel, a strip-like extension 9 is provided, which engages in a groove 10 of the tool carrier 2. This is about the captive connection a strip-like extension 9 and the tool carrier 2 penetrating bore 11 is provided which is gripped by a clamping sleeve 12. The plate-like extension 13 receiving the recess of the cutting part 1 forms with the chisel tip 15 in engagement with the coal face 14 Cross-section T-shaped profile. The chisel point which is directly in engagement with the coal face 14 is not essential to the invention and can have the shape suitable for the respective purpose.

The F i g. 4, 5 and 6 show a further embodiment in which the connecting element is formed similarly. This embodiment is for narrow chisels, such as sharp picks or the like. advantageous. The chisel tip 15 ′, which consists of a harder material, is fixed by the weld seam 18 welded to the tool carrier 2 'and again through the connection already explained (at 3') divided. Only small spare parts are therefore required for replacing worn cutting parts 1 '. The numbering otherwise corresponds analogously to the numbering according to FIG. 1.

Claims (3)

Patent claims: 1. Extraction tool for the extraction of coal, in particular planing chisels, with a releasably connected to the tool carrier cutting part, which od via clamping sleeves Tool carrier (2, 2 ') facing end face (3, 3') has a recess (4, 4 ') which is semicircular and non-positive with a rivet head-like projection (6, 6') provided with a collar (5, 5 ') of the Tool carrier (2, 2 ') encompasses and overlaps in such a way that parts (7, 7') of the cutting part (1, Y ) engage behind the collar (5, 5 '). 2. Extraction tool according to claim 1, characterized characterized in that the cutting part (1) at its rear end in the direction of travel (8) engages with a strip-like extension (9) in a groove (10) of the tool carrier (2), wherein into a strip-like extension (9) of the cutting part (1) and the tool carrier (2) Bore (11) a clamping sleeve (J 2) can be driven in in a manner known per se. 3. Extraction tool according to claims 1 and / or 2, characterized in that the towards the tool carrier (2) facing end face (3) of the cutting part (1) the offset side Limitation of a plate-like extension (13) forms, which is directly connected to the coal face (14) engaging chisel tip (15) forms a cross-sectionally T-shaped profile. Considered publications:
Belgian patent specification No. 634 940. 1 sheet of drawings 709 508/16 1. 67 ι Bundesdruckerei Berlin