EP0991848B1 - Meisselanordnung für schneidmeissel eines rotierend gelagerten werkzeugträgers - Google Patents
Meisselanordnung für schneidmeissel eines rotierend gelagerten werkzeugträgers Download PDFInfo
- Publication number
- EP0991848B1 EP0991848B1 EP98929115A EP98929115A EP0991848B1 EP 0991848 B1 EP0991848 B1 EP 0991848B1 EP 98929115 A EP98929115 A EP 98929115A EP 98929115 A EP98929115 A EP 98929115A EP 0991848 B1 EP0991848 B1 EP 0991848B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutter
- chisel
- axis
- bit
- tool carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000011435 rock Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/191—Means for fixing picks or holders for fixing holders
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
Definitions
- the invention relates to a chisel arrangement for cutting chisels a rotating tool holder, e.g. a cutting head or a cutting roller, in which the Chisel tips in the circumferential and rotational direction of the tool holder are arranged at an early incline and the chisel is overcome a spring force is tiltably mounted.
- a rotating tool holder e.g. a cutting head or a cutting roller
- a cutting chisel to be arranged pivotably in a chisel holder, the chisel in Chisel holder can be tilted under the influence of the cutting reaction forces is and in its original position by a return spring is resettable.
- the chisel shank receptacle is inserted into a ball socket of the chisel holder, which is one through the bore of the chisel holder limited pivotability or tiltability of the chisel results.
- the ball socket defines the position of the Pivot axis of the chisel, this pivot axis with consideration on the position of the chisel tip relative to the face in Direction of rotation behind the engagement of the chisel in the rock lies.
- EP-B1-0 200 037 shows and describes a pivotable holder a cutting chisel in which the chisel is one Swivel axis between stops in a mounting hole of the the pivot axis carrying the chisel holder is pivotable.
- the chisel holder is in operation after an initial swiveling of the component receiving the chisel on such a component Stop on and is thus rigidly supported.
- the swiveling of the component receiving the chisel serves to to actuate a valve, the actuation of the valve being counter the force of a spring, which receives the chisel Component after exiting the rock again from Lift valve tappet.
- a support for the reaction forces is not done by such a spring, the pivot axis in the embodiment selected in EP-B1-0 200 037 within the radial projection of the chisel tip onto the tool carrier lies.
- the chisel is used when active intervention in the Rock swiveled so that it does not move away from the rock contact can solve.
- the invention now aims to provide a chisel arrangement at the outset to create the kind with which it is above all succeeds in the chisel engaging in what is to be cut Rock can move out of the rock.
- the object of the invention is that the tilt axis of the chisel in the circumferential or rotational direction of the Chisel before the normal projection of the chisel tip on the axis of rotation of the tool carrier arranged on the tool carrier is and that the chisel in the engaged position against a spring is supported tiltable.
- the tilt axis in one Distance is arranged on the tool carrier, which in front of the line connecting the cutter head axis to the chisel tip lies, the possibility is created to get away from the rock contact safely to solve, it is also essential that the Chisel in the rock and thus in the engaged position is supported tiltably against a spring.
- the chisel is said to be in the engagement position still against the force of a spring be tiltable to improve the balance of power and to absorb occurring force peaks.
- the training according to the invention is advantageous so hit that the chisel holder on one arm Swivel lever is fixed, the one facing away from the swivel axis End is pressed against a spring element.
- the contact pressure of the End of the pivot lever facing away from the pivot axis against Spring element is essential in the operating position for absorbing the forces on the chisel engagement.
- the swivel lever should hiebei under a defined bias against the spring element be pressed and it therefore corresponds to a preferred one Development of the chisel arrangement according to the invention that the Contact pressure of the swivel lever adjustable against the spring element is. One is just closing a valve after exiting the spring force ensuring the chisel is for the take-up such reaction forces in no way suitable.
- Secure support and particularly good power absorption can be achieved in that the longitudinal axis of the pivot lever at an acute angle of less than 35 °, in particular less 25 °, to the tangent to the tool carrier in the area of the swivel axis is articulated, such an arrangement of the pivot lever the appropriate leverage ensures which for a secure springy support of the dynamic passive forces is advantageous.
- the spring element must also be in the engaged position still be resilient and therefore able be able to absorb high reaction forces. It is therefore advantageous the training so that the spring element of a Leaf spring or a leaf spring assembly is formed, the longer Axis approximately parallel to the pivot axis of the pivot lever Tool holder is fixed, which takes up little space also high spring forces and thus high force peaks are absorbed can be.
- a particularly good introduction of force to absorb the cutting forces can be achieved in that the distance (a) Swivel axis from the normal projection of the chisel tip onto the Chisel holder at least a third, preferably at least half, the normal distance of the swivel axis from the working face or the cutting track level of the chisel.
- Such Training allows the desired pivoting counter the force of a spring with effective absorption of the cutting forces, for which the training is advantageously made such that the distance of the contact point or contact center of the Swivel lever on the spring element is larger from the swivel axis than the distance (a) of the swivel axis from the normal projection the chisel tip on the chisel holder.
- the articulation geometry of the chisel arrangement is according to the invention Advantage chosen so that the resilient support of the pivot lever is selected in the operating position of the chisel so that the effective cutting forces are reduced.
- FIG. 1 shows a side view a swiveling chisel holder on the tool carrier and
- FIG. 2 shows a top view of the arrangement according to FIG. 1.
- a cutting bit 1 is shown, which in one Chisel holder 2 is added.
- the pick of the chisel in the Chisel holder 2 can be in a conventional manner and in particular in around the chisel axis 3 rotatable way to wear to minimize.
- the cutting reaction force is indicated by the arrow 4, which is the Direction of the resulting cutting forces corresponds, schematically indicated.
- This resulting cutting reaction force is composed of a passive force, the vector with 5 and a circumferential force, the vector of which is indicated by 6.
- the Line of action of the passive force, which is to the center of the rotational movement the tool carrier 7 is directed, is designated 8, wherein the axis of rotation of the tool carrier 7 is indicated by 9 is.
- the chisel holder 2 is on a one-armed swivel lever 10 the pivot axis 11 is pivotally mounted, the pivot axis 11 is arranged in a bearing component 12, which with the Tool carrier 7 is connected.
- the pivoting of the swivel lever 10 about the pivot axis 11 takes place against a spring element 13, which is designed as a leaf spring and also on Tool carrier 7 fixed in a corresponding spring holder 14 is.
- the bias of the pivot lever 10 against that Spring element 13 is correspondingly via a bolt 15 and nuts 16 set.
- the distance a of the swivel axis from the line of action of the cutting normal force the cutting reaction forces are chosen so that that in operation the chisel 1 and the chisel holder 2 against that Spring element 13 can dodge and in this way force peaks can be compensated.
- the free end of the pivot lever 10 rests on the spring element 13 and is biased against this spring element 13.
- the forces are here at a greater distance from the Swivel axis 11 initiated in the spring element 13 as the Distance a between the line of action of the normal cutting force and the swivel axis.
- the lever arm length over which the reaction forces in the Spring element 13 are derived, is indicated here with b.
- the pivot axis 11 is also at a distance c from the cutting track, with a suitable choice of this three distances the desired reduction of the force peaks results.
- Fig. 2 it can be seen that the longitudinal axis 17 of the leaf spring 13 substantially parallel to the pivot axis 11 on the schematic is arranged with 7 indicated tool carrier.
- the tool carrier itself forms part of the circumference of a cutting head or a cutting roller and is naturally in the representations 1 and 2 shown idealized.
- the kinematics of the articulation is as shown in FIG. 1 taken so that the longitudinal axis 18 of the pivot lever 10 with the tangent to the tool carrier 7 an acute angle ⁇ of about 20 °, one in Fig. 1 to this tangent parallel line is entered.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Percussive Tools And Related Accessories (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Turning (AREA)
- Earth Drilling (AREA)
Description
Claims (8)
- Meißelanordnung für Schneidmeißel (1) eines rotierend gelagerten Werkzeugträgers (7), wie z.B. eines Schneidkopfes oder einer Schneidwalze, bei welcher die Meißelspitzen in Umfangs- und Drehrichtung des Werkzeugträgers (7) voreilend geneigt angeordnet sind und der Meißel (1) unter Überwindung einer Federkraft kippbar gelagert ist, dadurch gekennzeichnet, daß die Kippachse des Meißels (1) in Umfangs- bzw. Drehrichtung des Meißels (1) vor der Normalprojektion der Meißelspitze auf die Rotationsachse (9) des Werkzeugträgers (7) auf dem Werkzeugträger (7) angeordnet ist und daß der Meißel (1) in der Eingriffslage gegen eine Feder (13) kippbar abgestützt ist.
- Meißelanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Meißelhalter (2) an einem einarmigen Schwenkhebel (10) festgelegt ist, dessen der Schwenkachse (11) abgewandtes Ende gegen ein Federelement gepreßt ist.
- Meißelanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Anpreßkraft des Schwenkhebels (10) gegen das Federelement (13) einstellbar ist.
- Meißelanordnung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Längsachse (18) des Schwenkhebels (10) unter einem spitzen Winkel von kleiner 35°, insbesondere kleiner 25°, zur Tangente an den Werkzeugträger (7) im Bereich der Schwenkachse (11) angelenkt ist.
- Meißelanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Federelement (13) von einer Blattfeder oder einem Blattfederpaket gebildet ist, deren längere Achse (17) zur Schwenkachse (11) des Schwenkhebels (10) etwa parallel am Werkzeugträger (7) festgelegt ist.
- Meißelanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Abstand (a) der Schwenkachse (11) von der Normalprojektion der Meißelspitze auf den Meißelhalter (7) wenigstens einem Drittel, vorzugsweise wenigstens der Hälfte, des Normalabstandes der Schwenkachse (11) von der Ortsbrust bzw. der Schneidspurebene des Meißels (1) beträgt.
- Meißelanordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Abstand des Anpreßpunktes bzw. Anpreßmittelpunktes des Schwenkhebels (10) am Federelement (13) von der Schwenkachse (11) größer ist als der Abstand (a) der Schwenkachse von der Normalprojektion der Meißelspitze auf den Meißelhalter (2).
- Meißelanordnung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Schwenkhebel (10) durch einen den Schwenkhebel (10) zwischen Schwenkachse (11) und Anpreßpunkt durchsetzenden Spannbolzen (15) gegen das Federelement (13) angepreßt ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT109897 | 1997-06-25 | ||
| AT0109897A AT408017B (de) | 1997-06-25 | 1997-06-25 | Meisselanordnung für schneidmeissel eines rotierend gelagerten werkzeugträgers |
| PCT/AT1998/000156 WO1999000580A1 (de) | 1997-06-25 | 1998-06-22 | Meisselanordnung für schneidmeissel eines rotierend gelagerten werkzeugträgers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0991848A1 EP0991848A1 (de) | 2000-04-12 |
| EP0991848B1 true EP0991848B1 (de) | 2002-02-06 |
Family
ID=3506551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98929115A Expired - Lifetime EP0991848B1 (de) | 1997-06-25 | 1998-06-22 | Meisselanordnung für schneidmeissel eines rotierend gelagerten werkzeugträgers |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0991848B1 (de) |
| AT (2) | AT408017B (de) |
| AU (1) | AU7897698A (de) |
| DE (1) | DE59803023D1 (de) |
| WO (1) | WO1999000580A1 (de) |
| ZA (1) | ZA985311B (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19908656C1 (de) * | 1999-02-27 | 2000-08-31 | Wirtgen Gmbh | Meißelhalterwechselsystem |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3697137A (en) * | 1969-12-15 | 1972-10-10 | Cincinnati Mine Machinery Co | Resilient mounting for cutting tools of mining machines and the like |
| DE3341321C2 (de) * | 1983-11-15 | 1986-04-24 | Ruhrkohle Ag, 4300 Essen | Anordnung der Schneidmeißelhalterung am Schneidkörper |
| DE3441950C1 (de) | 1984-11-16 | 1986-04-24 | Paurat GmbH, 4223 Voerde | Vorrichtung für die Halterung der Schneidmeißel sowie für die Steuerung der Bedüsungsmittelzufuhr bei einem Schneidkopf für eine Streckenvortriebsmaschine |
| DE8512938U1 (de) * | 1985-05-02 | 1985-07-25 | Kennametal GmbH, 6382 Friedrichsdorf | Vorrichtung für die Halterung eines Schneidmeißels sowie für die Steuerung der Bedüsungsmittelzufuhr bei einer Vortriebsmaschine |
| US5335977A (en) * | 1993-05-26 | 1994-08-09 | The United States Of America As Represented By The Secretary Of The Interior | Double acting bit holder |
-
1997
- 1997-06-25 AT AT0109897A patent/AT408017B/de not_active IP Right Cessation
-
1998
- 1998-06-18 ZA ZA985311A patent/ZA985311B/xx unknown
- 1998-06-22 EP EP98929115A patent/EP0991848B1/de not_active Expired - Lifetime
- 1998-06-22 AT AT98929115T patent/ATE213051T1/de not_active IP Right Cessation
- 1998-06-22 DE DE59803023T patent/DE59803023D1/de not_active Expired - Lifetime
- 1998-06-22 AU AU78976/98A patent/AU7897698A/en not_active Abandoned
- 1998-06-22 WO PCT/AT1998/000156 patent/WO1999000580A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ZA985311B (en) | 1999-01-11 |
| AT408017B (de) | 2001-08-27 |
| ATA109897A (de) | 2000-12-15 |
| WO1999000580A1 (de) | 1999-01-07 |
| EP0991848A1 (de) | 2000-04-12 |
| ATE213051T1 (de) | 2002-02-15 |
| AU7897698A (en) | 1999-01-19 |
| DE59803023D1 (de) | 2002-03-21 |
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