EP1159511B1 - Systeme a changement de porte-outil - Google Patents

Systeme a changement de porte-outil Download PDF

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Publication number
EP1159511B1
EP1159511B1 EP00904946A EP00904946A EP1159511B1 EP 1159511 B1 EP1159511 B1 EP 1159511B1 EP 00904946 A EP00904946 A EP 00904946A EP 00904946 A EP00904946 A EP 00904946A EP 1159511 B1 EP1159511 B1 EP 1159511B1
Authority
EP
European Patent Office
Prior art keywords
chisel
chisel holder
holder
base part
changing system
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
Application number
EP00904946A
Other languages
German (de)
English (en)
Other versions
EP1159511A1 (fr
Inventor
Bernd Holl
Dieter Simons
Günter HÄHN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wirtgen GmbH
Original Assignee
Wirtgen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP1159511A1 publication Critical patent/EP1159511A1/fr
Application granted granted Critical
Publication of EP1159511B1 publication Critical patent/EP1159511B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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
    • E21C35/188—Mining picks; Holders therefor characterised by adaptations to use an extraction tool
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle

Definitions

  • the invention relates to a chisel holder exchange system for a road milling machine, a cutting machine or the like with a base to which a chisel holder is interchangeably attached by means of a connecting mechanism, wherein the chisel holder interchangeably receives at least one chisel, wherein the central longitudinal axis of the chisel with respect to the surface to be machined at working angle smaller is employed as 90 °.
  • the chisel holder exchange system has a base part which is welded on a surface of a Walzenkörpes projecting.
  • the base part has a plug-in receptacle into which a plug-in insert of the bit holder can be inserted.
  • the chisel holder is provided with a receiving bore into which a chisel shank of a round shank chisel is inserted.
  • the bit holder can be clamped to the base part by means of a fastening screw.
  • the central longitudinal axis (rotation axis) of the round shank chisel is inclined relative to the surface to be machined.
  • bit holder can be fixed in two or more mounting positions on the base part, and that the central longitudinal axis of the bit is inclined at different working angles in the different mounting positions.
  • the bit holder is supported by a support surface on a contact surface of the base part, and that the bit holder for realizing the different mounting positions on its support surface relative to the contact surface is displaceable.
  • the bit holder is rastered relative to the base part adjustable.
  • the individual grid points certain, preferably used working angle are assigned. In a road milling machine these are for example the angles 35 °, 40 ° and 45 °.
  • the rastered adjustment can be realized, for example, that the bit holder is provided with a toothing, which is in engagement with a counter toothing of the base part, that the toothing and the counter tooth surface support flanks extending transversely to the adjustment direction of the bit holder relative to the base part.
  • the forces occurring during operation can be safely dissipated into the base part via the supporting flanks.
  • an inventive chisel holder change system is characterized in that the counter toothing of the base part has two partial teeth, and that the Operastattept are inclined transversely to the feed direction of the bit for receiving transverse forces ,
  • a chisel holder change system for example, that the base part has a contact part, which is equipped with a plurality of concentrically arranged tooth elements of the counter teeth, that the bit holder carries a clamping plate, which is provided with a trained on the counter toothing teeth, and that the bit holder relative to the base part is rotatable about an adjustment axis which is arranged transversely to the feed direction of the bit.
  • a connection mechanism can also be designed as a Hirth toothing. Due to the large number of tooth elements, extremely high forces can be transmitted via this connection mechanism.
  • the bit holder has a base body which carries a retaining lug for receiving the chisel in that the base body has an oblong hole which is arranged in alignment with a threaded receptacle of the base part such that a fastening screw can be inserted into the slot and can be screwed into the threaded receptacle, and that the bit holder can be adjusted when the fastening screw is loosened.
  • the screw head of the fastening screw should in this case be accommodated protected in a recess which expands following the slot.
  • a particularly good and firm clamping of the screw head with the bit holder can then be achieved if the screw head is designed as a lens screw head.
  • bit holder In Vedel fashionfall or inadmissible high stresses, it may happen that a bit holder takes damage.
  • the bit holder on a base body carries a retaining lug, that the retaining lug has a receiving bore for a chisel shank of the bit, and that the retaining lug with the body about a predetermined breaking point is connected.
  • FIG. 1 shows a bit holder changing system which has a base part 40 and a bit holder 20.
  • the base part 40 has a lower connecting surface 41, with which it can be placed on a cylindrical base body, for example a road milling machine. The connection with the cylindrical base body by means of welds.
  • the base part 40 On its upwardly facing side, the base part 40 is provided with an arcuate contact surface.
  • the contact surface On its upwardly facing side, the base part 40 is provided with an arcuate contact surface.
  • the contact surface has a counter teeth 42.
  • the individual teeth of this counter toothing 42 are, as shown in FIG. 1 A reveals, triangular in cross-section and thus form two contact edges.
  • the teeth of the counter toothing 42 extend over the entire width of the base part 40. On half the width of the teeth, a threaded receptacle 43 is incorporated into the contact surface of the base part 40.
  • the threaded receptacle is arranged so that it is incorporated as far as possible in the base part and thus provides a sufficient thread length for a mounting screw.
  • the threaded receptacle 43 is therefore obliquely introduced into the contact surface.
  • a small overall height of the base part 40 can be realized. This has particular advantages since, therefore, the entire structure of the bit holder changing system can be kept small.
  • the bit holder 20 has a base body 25, which is provided with a slot 28.
  • the slot 28 widens to the outside of the main body 25 out by means of a recess 27.
  • the fastening screw which in the present case, the connection mechanism 30 represented inserted and screwed into the threaded receptacle 43.
  • the screw head 32 is then housed protected in the recess 27.
  • a serration 26 of the main body 25 can be held in firm engagement with the counter teeth 42. Due to the large number of meshing teeth, a large interface is created, over which the bit holder 20 can be pressed against the base part 40 and over which large forces can be transmitted during operation.
  • the main body 25 has a protruding holding lug 21, in which a receiving bore 22 is incorporated.
  • the central longitudinal axis of the receiving bore 27 is perpendicular to the arcuate contact surface of the base member 40.
  • a Austreibkanal 23 is drilled in the bit holder 20.
  • the Austreibkanal 23 crosses the receiving bore 22.
  • a chisel 10 can be used.
  • the chisel 10 has a chisel head 17 which carries a chisel tip 11.
  • the chisel tip 11 is formed as a hard metal element.
  • the chisel head 17 is followed by a chisel shaft, onto which a clamping sleeve 12 is mounted.
  • the clamping sleeve 12 is braced in the receiving bore 22.
  • the clamping sleeve 12 holds the chisel shaft of the chisel 10 and thus prevents it from falling out.
  • the chisel head 17 rests on a wear protection disk 14.
  • the wear protection disk 14 is supported on the tool holder 20 around the receiving bore 22.
  • the extraction of the bit 10 from the receiving bore 22 can be done in two different ways.
  • a Austreibdorn be introduced through an inlet opening 24 in the expulsion channel 23 until it comes to rest on an end face 13 of the drill collar. Subsequently, the chisel shaft can be driven out of the receiving bore 22 with a hammer blow. Furthermore, in the chisel head 17, a circumferential Ausziehnut 15 is introduced into which an extraction tool can be used. By means of a lever then the bit 10 can be levered out of the receiving bore 22.
  • FIGS. 1A and 1B show that the fastening screw is arranged centrally in the slot 28. This results in a working angle ⁇ under which the central longitudinal axis 16 of the bit 10 is employed with respect to the surface to be machined.
  • the complementary angle is shown in FIG. 1A with ⁇ '.
  • the fastening screw is tightened again, so that the teeth 26 can clamp with the counter teeth 42.
  • Such changed setting position is shown in Figs. 2A and 2B.
  • the working angle ⁇ is now 45 ° (compared to the previous setting of 40 °). In the setting position according to FIGS. 2A and 2B, the fastening screw and the screw head 32 abut against one end of the oblong hole 28 or the recess 27.
  • the other maximum working angle ⁇ is illustrated in Figs. 3A and 3B.
  • the fastening screw and the screw head 32 abuts against the other end of the oblong hole 28 or the recess 27.
  • an operating angle ⁇ of 35 ° is realized. It can be seen that regardless of the setting position of the bit holder 20, the central longitudinal axis 16 of the bit 10 is always arranged normal to the contact surface of the base part 40. As a result, an optimal derivation of the forces resulting in labor input is possible.
  • a cylindrical geometry has been selected for the screw head 32 of the fastening screw.
  • a Linsenkopfgeometrie can be selected.
  • a possible embodiment of a base part 40 is shown in a perspective view.
  • the two partial teeth 42.1 and 42.2 are inclined in the direction transverse to the feed direction of the round shank chisel 10. This forms in the transition region between the two partial teeth 42.1, 42.2 a ratchet-shaped edge 42.3.
  • this embodiment of the counter teeth 42 and the teeth 26 of the bit holder 20 is executed. As a result of this configuration, the forces acting transversely to the feed direction of the bit can be positively transferred via the teeth 26 and the counter teeth 42 in the base part 40.
  • a further embodiment variant of a chisel holder change system is shown.
  • the base part 40 is placed with its connecting surface 41 on the surface of a roller body 50.
  • the base part 40 has a contact part 44.
  • This contact part 44 is provided with a star-shaped counter toothing 42.
  • the individual teeth of the counter teeth 42 are directed radially outwards starting from a common center.
  • the central longitudinal axis of the fastening screw is arranged, of which in Fig. 5, the screw head 32 can be seen.
  • a clamping plate 25.1 of the main body 25 of the bit holder 20 are placed on the contact part 44.
  • the clamping plate 2.5 is provided with a toothing 26 which is adapted to the counter toothing 42 of the base part 40.
  • the serration shown in FIG. 5 is commonly referred to as Hirth serration.
  • the bit holder 20 can be staggered in a stepwise manner corresponding to the tooth pitch with respect to the base member 40. This also changes the working angle ⁇ of the bit 10.
  • the working angle ⁇ can be changed quickly and easily.
  • the removal tool for example a road milling machine
  • the removal tool can be easily adapted to different applications. If, for example, a large working angle ⁇ is selected, a fine surface roughness can be produced in road milling.
  • small working angles ⁇ lead to a large overburden volume combined with a large roughness depth.

Claims (10)

  1. Système à changement de porte-outil pour un engin de fraisage de chaussée, une haveuse ou autre, avec un socle sur lequel un porte-outil est fixé de manière interchangeable au moyen d'un mécanisme de liaison, dans lequel le porte-outil reçoit de manière interchangeable au moins un outil et dans lequel l'axe longitudinal central de l'outil est monté selon un angle de travail inférieur à 90° par rapport à la surface de travail, caractérisé en ce que l'outil est configuré comme un outil à queue ronde avec une tête d'outil et une queue d'outil, la queue d'outil étant insérée dans un trou de réception du porte-outil (20), en ce que l'axe de rotation formé par la queue d'outil est orienté selon l'angle de travail, en ce que le porte-outil (20) peut être fixé dans deux positions de montage ou davantage sur le socle (40), et en ce que l'axe longitudinal central (16) de l'outil (10) est incliné selon différents angles de travail (α) dans les différentes positions de montage.
  2. Système à changement de porte-outil selon la revendication 1, caractérisé en ce que le porte-outil (20) s'appuie au moyen d'une surface d'appui sur une surface de support du socle (40), et en ce que le porte-outil (20) est mobile sur sa surface d'appui par rapport à la surface de support pour réaliser les différentes positions de montage.
  3. Système à changement de porte-outil selon la revendication 1 ou 2, caractérisé en ce que le porte-outil (20) est réglable par crans par rapport au socle (40).
  4. Système à changement de porte-outil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le porte-outil (20) est doté d'une denture (26) qui est en prise avec une denture opposée (42) du socle (40), et en ce que la denture (26) et la denture opposée (42) présentent des flancs d'appui plats qui s'étendent perpendiculairement à la direction de réglage du porte-outil (20) par rapport au socle (40).
  5. Système à changement de porte-outil selon la revendication 4, caractérisé en ce que la denture opposée (42) du socle (40) présente deux dentures partielles (42.1, 42.2), et en ce que les dentures partielles (42.1, 42.2) sont inclinées dans une direction perpendiculaire à la direction d'avance de l'outil (10) pour recevoir des forces perpendiculaires.
  6. Système à changement de porte-outil selon la revendication 4, caractérisé en ce que le socle (40) présente un élément de montage (44) qui est équipé d'une multitude d'éléments dentés concentriques de la denture opposée (42), en ce que le porte-outil (20) porte une plaque de serrage (25) qui est dotée d'une denture (26) adaptée à la denture opposée (42) et en ce que le porte-outil (20) est pivotant par rapport au socle (40) autour d'un axe de réglage qui est perpendiculaire à la direction d'avance de l'outil (10).
  7. Système à changement de porte-outil selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le porte-outil (20) présente un corps de base (25) qui porte un appendice de retenue (21) pour recevoir l'outil (10); en ce que le corps de base (25) présente un trou oblong (28) qui est de niveau avec un logement taraudé (43) du socle (20), en ce qu'une vis de fixation peut être insérée dans le trou oblong (28) et vissée dans le logement taraudé (43), et en ce que le porte-outil (20) est réglable lorsque la vis de fixation est desserrée.
  8. Système à changement de porte-outil selon la revendication 7, caractérisé en ce que le trou oblong (28) s'élargit en un creux (27) dans lequel une tête de vis (32) de la vis de fixation est placée.
  9. Système à changement de porte-outil selon la revendication 8, caractérisé en ce que la tête de vis (32) est configurée comme une tête en goutte-de-suif.
  10. Système à changement de porte-outil selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le porte-outil (20) porte un appendice de retenue (21) sur son corps de base (25), en ce que l'appendice de retenue (21) présente un trou de réception (22) pour une queue d'outil de l'outil (10), et en ce que l'appendice de retenue (21) est relié avec le corps de base (25) par un point destiné à la rupture (25.2).
EP00904946A 1999-02-27 2000-01-22 Systeme a changement de porte-outil Expired - Lifetime EP1159511B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19908656A DE19908656C1 (de) 1999-02-27 1999-02-27 Meißelhalterwechselsystem
DE19908656 1999-02-27
PCT/EP2000/000477 WO2000052303A1 (fr) 1999-02-27 2000-01-22 Systeme a changement de porte-outil

Publications (2)

Publication Number Publication Date
EP1159511A1 EP1159511A1 (fr) 2001-12-05
EP1159511B1 true EP1159511B1 (fr) 2006-05-17

Family

ID=7899161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00904946A Expired - Lifetime EP1159511B1 (fr) 1999-02-27 2000-01-22 Systeme a changement de porte-outil

Country Status (6)

Country Link
US (1) US6619756B1 (fr)
EP (1) EP1159511B1 (fr)
JP (1) JP3392827B2 (fr)
AT (1) ATE326612T1 (fr)
DE (2) DE19908656C1 (fr)
WO (1) WO2000052303A1 (fr)

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Publication number Publication date
ATE326612T1 (de) 2006-06-15
JP3392827B2 (ja) 2003-03-31
EP1159511A1 (fr) 2001-12-05
JP2002538339A (ja) 2002-11-12
WO2000052303A1 (fr) 2000-09-08
DE19908656C1 (de) 2000-08-31
DE50012771D1 (de) 2006-06-22
US6619756B1 (en) 2003-09-16

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