DE7138790U - Cutting or chiselling chisel with tool holder designed in the manner of a pick - Google Patents

Description

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'■ ···. PATENT AGENCIES

DR. ERNST STURM DR. HORST REINHARD DIPL.-ING. KARL-JÜRGEN KREUTZ

8000 Manchen 40, Leopolditnfc 20 / IV Telephone: (0811) 39 64 51

Dnht: iMipctent B * nk: Deutacbc Bank λΟ Mttncben 21/14171 PcMtKfaeck: Munich 9756

date

Applicant: Kennametal Inc., 1565o Latrobe / PA, One Lloyd Avenue / USA

s Mining tools ^ and tool holders. Schrämmeiasel )

The innovation relates to a pick-like mining tool and a tool holder or support body for it.

From US-PS 34 99 685 a peck-like tool is vorbenar- ' with a wear sleeve interposed between the support body and the pick, both the pick and the sleeve being rotatable. This arrangement has the advantage that the pick or the cutting tip of the pick remains constantly sharp because of the ongoing rotation, because the wear is distributed over the entire circumference, so that the entire circumference wears evenly and the The peck is not about to be flattened on one side.

The wear-resistant block prevents rapid wear, because the wear thanks to the rotation of the pick

divided between picks

Block or. Support body,

the sleeve being held in a block against lateral bending and has a good fit that absorbs substantially all of the wear and tear. Because of the wear-resistant The block can survive several picks and does not need to be replaced before the machine is completely overhauled must become.

So while the arrangement of the wear-resistant sleeve is essential Has advantages, there are operating conditions in hard rock formations, which the Pi ^. load η too much, or lead to breakage or damage to the pick. Under these Conditions would require the use of heavier, stronger picks. The innovation is based on the task of a to create such a pick which can be inserted into the support body after said sleeve has been removed.

The pick according to the Neuerurig fits rotatably into the receiving bore of the support body and fits, in particular into the Seat intended per se for said sleeve. By inserting a renewal-compatible pick into the mounting hole instead of the sleeve of the block with the same dimensions as the mounting hole of the block is used, an extremely strong picks are used against said hard rock formations, these picks being firm and solid in the Support body is held so that it can handle the heavy loads

can withstand.
■ When you have mastered the tough formulas, you can

put a lighter pick under the heavy pick 'Interposition of said sleeve inserted into the support body! will.

; In short, it is a heavy-duty tool with a pick and a support body for the pick, the support body having a through hole with an ^{annular shoulder:} in the middle area of the hole between a thicker and ^! has a thinner part, to which receiving bore the pick is formed correspondingly with a thicker part, an annular shoulder and a thinner part in the receiving bore so as to be rotatable, wherein both the thicker part and the thinner part; ■ '"protrude over the bore and the protruding thicker part: carries a conical working tip and the rear protruding thinner part has holding means for holding and securing the pick in the bore. To further explain the specification j, an embodiment is described below with reference to the drawing.

The support body 1o is attached to a tunneling machine! eg welded on. For example, the block 1o on a \ shaft or drum or a chain or on the face of a rotatable disk or the like. be attached so that the top

I the pick or the pick against the rock to be worked

are directed, preferably at an angle to the axis of the pick?

so that the pick rotates while working.

The block 1o has a through hole with another Part 12 and a narrower part 14 and a conical seat in between. The conical seat 16 tapers to the narrower ones Bore part 14 out. In this block or support body 1o a pick is inserted which is ötationsäyraetrisch. The prick has a cylindrical portion 18 which fits into the larger part of the bore 12 and has a narrower part 2o which in the narrower part of the bore 14 fits. A conical part 22 extends between the two, which corresponds to the conical seat 16 in the Block 1o corresponds.

The thinner part 2o protrudes from the rear end of the bore and there has a groove 24 for receiving retaining means, such as the rings 26, which fit into the groove and have a larger outer diameter than the bore part 14. the Rings hold the pick in the hole but do not prevent the pick from rotating in the hole.

The wider part 18 extends outwardly towards the front and ends in a conical part 28 into which a hard metal insert 3o, for example cemented tungsten carbide, is inserted, which forms the working tip. The axial length of the thicker part of the Basi3 the peak measured 28 to the end face of the block 1o, is preferably not less than those in the BIock: / ^{r <1o} protruding ^{County; j} of the thicker TpLl.es 18, but can wesentl: c : r. lan, - be ^r ? r.

Thanks to the firm side seat, the tip of the pick

significantly protrude forward. Thanks to the arrangement of the Seated in the block and on the pick in such a way that substantial parts of the length of the pick can be rotated on both sides in the block are, the arrangement is extremely strong and wear-resistant, where j

i at the main wear in the area of the seat: 3 16/22 j takes place. Thanks to the arrangement of the retaining rings 26 outside the block, the block can be of relatively simple design and the receiving bore and seat can be produced by simple drilling operations. Furthermore, the entire axial length is the mounting hole is used as a mounting surface and is not required to hold back or secure the pick.

Claims (7)

Geometric sample registration G 7133 79ο. 1 Kennametal Inc, Latrobe, Claims for Protection 1. Tool for mining Yortriebsmaschirien with a substantially cylindrical pick, which is inserted into a support body, wherein the through hole has a part with a larger diameter and a part with a smaller diameter and a shoulder connecting both parts, which is approximately in the middle of the axial length of the mounting hole is provided,
dad'rrch marked, that the pick is inserted freely rotatable into the hole and accordingly the receiving hole one of the shoulder of the receiving hole corresponding Shoulder (22) between a thicker part (18) and a dim inner part (2o) with the corresponding bore parts has corresponding Durohmesser, with a free rotation allowing clearance in front of | is seen, so that both the thicker and the thinner end are out the receiving bore protrudes, with retaining means being provided at the thinner end outside the bore with a diameter greater than the drill pipe diameter which allow free rotation of the pick in the bore and wherein the protruding thicker part has a tapered end, and there diokerus part from the ring oar shoulder (22) to the conical part (28) with uniform diameter, so cylindrical is formed. ; - 2 - 2. Device according to claim 1, characterized in that that a hard metal insert (3o) is inserted into the conical end (28). J. Device according to claim 1, characterized in that that the shoulder (16) in the bore and the corresponding shoulder (22) are conical, the amount of the winker and the direction of the conicity being the same. 4. Apparatus according to claim 3, characterized in that that the shoulders taper inwards towards the smaller part. Device according to Claim 1, characterized in that the annular shoulder is located approximately in the middle of the axial length of the bore ", the length of the part with the smaller diameter of the pick which is located within the part with the smaller diameter of the bore in the Block is located % is not greater than the length of the thicker part of the pick, which is on the other side in the thicker or wider Veil of the Eohrun; in the block. characterized in that the thicker part of the pick (from the approach of the conical tip to the Front side of the block measured) at least as far out of the bore ", disengages, like the remaining area of the thick * η part (18) in the hole is lowered into it. 7. The device according to claim 1, characterized in that the rear protruding part of the piece has an annular groove in which egg ?! VeAnTrrintr or spring washer © are used to secure the Pirske.