EP3467255B1 - Porte-burin - Google Patents

Porte-burin Download PDF

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Publication number
EP3467255B1
EP3467255B1 EP18197493.2A EP18197493A EP3467255B1 EP 3467255 B1 EP3467255 B1 EP 3467255B1 EP 18197493 A EP18197493 A EP 18197493A EP 3467255 B1 EP3467255 B1 EP 3467255B1
Authority
EP
European Patent Office
Prior art keywords
centering
chisel
receptacle
holder
bit
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.)
Active
Application number
EP18197493.2A
Other languages
German (de)
English (en)
Other versions
EP3467255A1 (fr
EP3467255C0 (fr
Inventor
Karsten Buhr
Andreas Jost
Thomas Lehnert
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
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Filing date
Publication date
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Publication of EP3467255A1 publication Critical patent/EP3467255A1/fr
Application granted granted Critical
Publication of EP3467255B1 publication Critical patent/EP3467255B1/fr
Publication of EP3467255C0 publication Critical patent/EP3467255C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • 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
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • E21C35/1933—Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • B28D1/188—Tools therefor, e.g. having exchangeable cutter bits with exchangeable cutter bits or cutter segments
    • 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

Definitions

  • the invention relates to a chisel holder for a soil cultivation machine, in particular a road milling machine, with a support body on which a holding section is formed in the area of a processing side, into which a chisel holder for receiving the shaft of a round-shaft chisel is formed, the holding section being on its side facing away from the support body End of a wear surface enclosing the chisel receptacle for the contact of the round-shaft chisel or a support element is closed, the chisel receptacle being transferred indirectly or directly into the wear surface via a centering surface of a centering receptacle that is aligned obliquely to the central longitudinal axis of the chisel receptacle and whereby a plug-in attachment is provided on the side opposite the holding section Attachment of the chisel holder to a base holder is formed on the support body.
  • Soil cultivation machines are used to carry out milling work on hard surfaces, such as roads. These each have a rotating milling drum. A large number of chisels are attached to the milling drum, which penetrate into the subsoil through the rotation of the milling drum and remove it. The chisels are subject to high levels of wear. It is therefore known to attach the chisels interchangeably to a milling drum tube of the milling drum.
  • base holders can be firmly attached to the milling drum tube, for example by welding.
  • a chisel holder can then be releasably attached to such a base holder.
  • the chisel holder has a chisel holder in which a chisel can also be releasably mounted.
  • Worn chisels can be easily replaced. If the chisel holder is worn out after several chisel changes, it can be removed from the base holder and replaced. It is known to store the chisels in the chisel holder so that they can rotate about their longitudinal axis and are axially blocked. During the milling process, the chisels rotate about their longitudinal axes, which means that a chisel tip or a chisel head that engages in the subsurface is positioned evenly over theirs Circumference is worn. In order to absorb axially acting forces, the chisel head rests directly on the chisel holder or with the interposition of a support element.
  • the chisel holder Due to the rotation, the chisel holder is subject to increased wear in the area where the chisel head or the support element rests. In addition to the axial forces, strong transverse forces also act on the chisel during soil cultivation. These lead to uneven wear of the chisel holder in the area of the support of the chisel head or the support element. Furthermore, they lead to high forces in the transition from the bit holder to the base holder. If the chisel holder wears unevenly, the free rotation of the chisel will be restricted. In particular, this then tends to block. However, if the rotation of the chisel is restricted, it will no longer wear evenly along its circumference in the desired manner. Rather, one-sided wear occurs, which leads to premature tool failure.
  • a chisel especially a round-shaft chisel, known with a chisel head and a chisel shaft.
  • the chisel is held with its chisel shaft in a cylindrical chisel holder of a holding attachment of a chisel holder.
  • the chisel shaft is secured in the chisel holder by means of a fastening sleeve, which can be rotated about its central longitudinal axis but is axially blocked.
  • the chisel head which is larger in diameter than the chisel shaft, rests on a wear surface of the holding attachment via a disk-shaped support element on the front side and all around the chisel holder.
  • the holding attachment is cylindrical. Opposite the chisel, the holding attachment is connected to a base part of the chisel holder. The base part extends transversely to the holding attachment. Laterally offset and opposite to the holding attachment, a plug-in attachment is formed on the base part. This is used to attach the chisel holder to a base holder of a milling drum described above.
  • the chisel holder is designed as a through hole. It penetrates the retaining attachment.
  • the chisel holder widens into a centering holder.
  • the surface of the centering mount is oblique to the central longitudinal axis Chisel holder aligned. It merges into the wear surface of the holding attachment via a bead. The bead protrudes beyond the wear surface.
  • the surface of the support element facing the holding attachment is designed to be complementary to the end face of the holding attachment. The support element rests with a seat on the wear surface of the holding attachment. In the area of the bead, a circumferential groove is formed in the support element, which receives the bead.
  • a centering projection of the support element that protrudes beyond the seat engages in a form-fitting manner in the centering receptacle of the chisel holder.
  • the support element is guided in the radial direction.
  • axial play of the chisel in the chisel holder is required.
  • a larger axial play is provided for larger chisels than for smaller chisels. If the axial play exceeds the height of the centering receptacle, the lateral guidance of the support element is lost through the centering attachment. This leads to increased and uneven wear on the bit holder, which reduces its service life. This applies in particular to the high transverse forces that are transmitted from the chisel head via the support element to the wear surface of the holding attachment and lead to uneven abrasion if the support element is not precisely guided.
  • the high transverse forces lead to a heavy load on the plug-in attachment and the fastening elements with which the plug-in attachment is held in the base holder. These can lead to fatigue fractures on the plug-in attachment or to wear or loosening of the fastening elements and thus to damage or loss of the chisel holder with the chisel attached to it.
  • the disk has ribs on its front side facing the head of the cutting bit and recesses on its opposite back, which improves the rotatability of the disk about its central axis.
  • On its back is circumferential and adjacent a central hole is formed with a centering attachment with a surface aligned obliquely to the central axis.
  • the centering attachment can be disengaged from the chamfer, so that its lateral guidance is lost. This leads to increased wear on both the disc and the bit holder, particularly when there are high transverse forces acting on the bit.
  • the object of the invention is achieved in that a centering height measured in the direction of the central longitudinal axis, which is between an end of the centering receptacle facing away from the wear surface and a maximum point of an extension projecting beyond the wear surface, is designed in such a way that the ratio between the inner diameter of the chisel receptacle and the Centering height is less than 8, and that the support body has one or more removal surfaces on its side facing away from the holding section, the one removal surface extending on both sides of a central plane which receives the central axis and which extends in the direction of the feed direction, or that on both sides of this Central plane extends at least one removal surface
  • the centering receptacle serves to accommodate and guide a centering approach of a support element, as can be arranged between a round-shank chisel and the holding section of the bit holder, or a centering approach which is molded directly onto the round-shaft chisel when it rests against the holding section without an intermediate support element.
  • the centering attachment is designed to be complementary in shape to the centering receptacle and stands over a surface (seat surface or support surface) facing the chisel holder Support element or the chisel head. The centering approach is therefore in engagement with the centering receptacle. As a result, the support element or the round shank chisel is guided radially.
  • a shoulder is formed in the area of the wear surface of the chisel holder, it engages in a corresponding recess in the seat surface of the support element or in the support surface of the chisel head. This achieves additional lateral guidance of the support element or the chisel head.
  • the measure that the ratio between the inner diameter D i of the chisel holder and the centering height is less than 8 ensures sufficient blocking or reduction of lateral movement of the support element or the round shank chisel relative to the chisel holder.
  • the centering height can be chosen to be greater than the maximum axial play of the round shank bit expected over the life expectancy of the pick.
  • the axial play is greater for large round-shank chisels with correspondingly large chisel shanks than for comparatively small round-shank chisels. This is taken into account by specifying the ratio between the inside diameter D i of the chisel holder and the centering height. Good lateral guidance of the support element or the round shank chisel is therefore guaranteed for all chisel sizes used when the chisel is pulled out of the chisel holder to the maximum within the axial play. Due to the slight lateral movement of the support element and the round shank chisel, the longitudinal wear of the holding section of the chisel holder can be kept low.
  • the support body has on its side facing away from the holding section at least two removal surfaces (first or second removal surfaces) which form a pair of removal surfaces and which are at an angle to one another.
  • the removal surfaces are preferably aligned in such a way that the forces to be transmitted from the removal surfaces to the support surfaces are essentially aligned in the direction of the surface normal of one of the removal surfaces or the support surfaces.
  • the support body and thus the bit holder can preferably be designed symmetrically.
  • the chisel holder can thus be used in all positions of the milling drum, which are aligned in mirror image to one another, for example on the opposite sides of the milling drum.
  • the centering receptacle in conjunction with the centering attachment, also leads to a labyrinth-like seal. This reduces wear on the chisel.
  • the sealing effect can be further improved by lugs arranged on the wear surface, which engage in corresponding recesses.
  • the ratio between the inner diameter D i of the chisel holder and the centering height is less than 7.5, preferably less than 7.0, particularly preferably less than 6.5.
  • a ratio of less than 7.5 good lateral guidance is achieved even with transverse forces acting directly on the support element or the round shank bit, for example from impacting overburden material.
  • a ratio of less than 7.0 further improves the lateral guidance, so that the simultaneous action of axially aligned forces distributed unevenly over the support element and radially acting transverse forces does not lead to a wobbling movement of the support element, resulting in high levels of wear.
  • a ratio of less than 6.5 sufficient lateral guidance is achieved even towards the end of the service life of the support element and the round shank bit, when the wear that has already occurred may cause the axial play of the round shank bit to be excessively increased.
  • a radially acting guidance of the support element and/or the round-shaft chisel while at the same time providing good rotatability of the support element and/or the chisel can be achieved in that the extension is arranged circumferentially to the chisel holder.
  • the lateral guidance of the support element can be further improved in that several approaches of the same or different heights are formed on the wear surface of the holding section and that the ratio between the inside diameter D i of the chisel holder and the centering height to one of the approaches, preferably the ratio between the inside diameter D i of the chisel holder and the largest centering height determined for an approach is less than 8.
  • a further improvement in the lateral guidance can be achieved in that a guide groove is formed into the adjacent wear surface at a distance and circumferentially from the centering receptacle.
  • the guide groove enables a guide bar formed on the support element or the round shank chisel to engage in this. This improves the rotatability of the support element or the round shank chisel, which leads to reduced longitudinal wear of the holding section of the chisel holder.
  • Good rotatability of the support element or the round shank chisel can be achieved by forming the extension between the centering receptacle and the guide groove and by ensuring that the centering receptacle has a greater depth than the guide groove relative to the adjacent wear surface. In this way, triple radial guidance of the support element or the round shank bit on the bit holder is achieved, namely in the area of the centering receptacle, on the shoulder and on the guide groove.
  • the rotatability of the support element or the round shank chisel can be further improved by ensuring that transitions between the centering surface, the wear surface, the shoulder and/or the guide groove are continuous or rounded. This avoids sharp edges that block rotation Good lateral guidance of the support element or the round shank chisel can result from the height of the attachment relative to the wear surface being greater than or equal to 0.3 mm, preferably between 0.3 mm and 2 mm, particularly preferably between 0.5 mm and 1 .5 mm. With an approach smaller than 0.3 mm, it is not possible to achieve a sufficient improvement in the lateral guidance of the support element or the round shank chisel.
  • the inside diameter is D; is 20 mm and the centering height is greater than 2.5 mm or that the inner diameter D i is 22 mm and the centering height is greater than 2.75 mm or that the inner diameter D; 25 mm and the centering height is greater than 3.125 mm or that the inner diameter D; 42 mm and the centering height is greater than 5.25 mm.
  • chisel holders with an inner diameter D i of 20 mm or 22 mm and a centering height of at least 2.5 mm or 2.75 mm are suitable.
  • chisel holders For medium-sized chisels, chisel holders with an inner diameter D; of 25 mm and a centering height of 3.125 mm. For large chisels and associated chisel holders, chisel holders with an inner diameter D i of 42 mm and a centering height of at least 5.25 mm can be used. With a ratio of less than 8 between the inner diameters D i of the chisel holders and the respective centering height, suitable centering approaches are provided for all common sizes of the support elements or the round shank chisels. This ensures that, for example, with larger chisels with correspondingly greater forces occurring and a greater axial play of the chisel, there is sufficient lateral guidance of the support elements or the chisel.
  • Suitable lugs or guide grooves can be provided by attaching the lug and/or the guide groove to the wear surface using a machining manufacturing process during the production of the bit holder. If the attachment and/or the guide groove are already attached to the wear surface during the production of the chisel holder, the chisel shaft and the chisel holder are protected from contamination by the formed, labyrinth-like seal at the start of operation. The good lateral guidance is already present when the chisel holder is new, so there is little wear right from the start.
  • the transfer of transverse forces acting on the chisel via the chisel holder to the base holder can be improved in that the support body has at least one further removal surface which is at an angle to the two removal surfaces of the removal surface pair.
  • the at least three, particularly preferably four, removal surfaces are preferably aligned in such a way that at least one of the surface normals of the removal surfaces runs at least approximately in the direction of the force action given the possible transverse forces that occur.
  • the force can thus preferably be transferred from the removal surfaces aligned transversely to it to the base holder. This significantly reduces the load on the plug-in attachment of the chisel holder.
  • Figure 1 shows a perspective side view of a chisel holder 20 that is detachably connected to a base holder 10.
  • the base holder 10 is closed off by a concavely shaped, lower end side 11.
  • the base holder 10 can be attached to a milling drum tube, not shown, of a soil cultivation machine, in this case a road milling machine.
  • the base holder 10 is preferably welded to the milling drum tube.
  • a base body 13 of the base holder 10 has two inclined surfaces 15 arranged at an angle and, based on a central longitudinal plane of the base holder 10, symmetrically to one another at the front in the working direction.
  • the inclined surfaces 14 merge into side surfaces of the base body 13 at an angle.
  • the side surfaces are preferably aligned parallel to the working direction of the base holder 10 when operating on a milling drum. Due to the arrangement of the inclined surfaces 15, the inclined surfaces 14 and the adjoining side surfaces, overburden material slides past the base holder 10 to the side.
  • the chisel holder 20 has a support body 21, which is closed off at the front by an apron 22.
  • a holding section 30 is molded onto the support body 21 facing away from the base holder 10.
  • the holding section 30 is cylindrical. Opposite the support body 21, the holding section 30 is closed off by a wear surface 31.
  • the wear surface 31 is arranged all around a chisel holder 32 of the chisel holder 20.
  • the chisel holder 32 is formed by a cylindrical bore. She is along one in the Figures 6-15 shown central longitudinal axis M aligned.
  • the chisel holder 32 widens in a chamfer shape at its end facing the wear surface 31 in the area of a centering holder 33.
  • a bead-shaped extension 34 is formed on the wear surface 31 and projects beyond it parallel to the central longitudinal axis M.
  • Wear markings 30.1 are provided on the outer surface of the holding section 30. In the present case, the wear markings 30.1 are designed as circumferential grooves. They are arranged at different distances from the wear surface 31. Lengthwise wear of the holding section 30 can be recognized and evaluated using the wear markings 30.1.
  • the chisel holder 20 is symmetrical to one in the Figures 3 and 4 shown central transverse plane MQ, this central transverse plane MQ accommodates the central longitudinal axis M of the chisel holder 32 and extends in the direction of the feed direction V, like that Figures 3 and 4 reveal.
  • the surface of the support body 21 and the apron 22 facing away from the base holder 10 form drainage surfaces for the overburden material. These are aligned obliquely to the central transverse plane MQ, so that a web 26 aligned in the direction of the central transverse plane MQ is formed in front of the holding section 30 in the working direction.
  • Figure 2 shows the in Figure 1 shown base holder 10 with the chisel holder 20 in an exploded view.
  • a plug-in projection 40 is formed onto the support body 21.
  • the plug-in extension 40 is connected to the support body 21 offset from the holding section 30 in the working direction V of the chisel holder 20. It is aligned in the direction of its longitudinal extent towards the base holder 10.
  • two contact surfaces 41 of which only one can be seen in the selected perspective, protrude above the surface of the plug-in attachment 40 in the working direction.
  • a pressure screw receptacle 42 can be formed into the plug-in attachment in the form of a recess.
  • the pressure screw receptacle 42 is preferably closed in the direction of the base holder 10 by a pressure surface 42.1 which extends obliquely to the longitudinal extent of the plug-in extension 40.
  • the base holder 10 is penetrated by a plug-in receptacle 16.7.
  • the plug-in receptacle 16.7 is aligned in the direction of the plug-in extension 40 of the chisel holder 20. It serves to accommodate the plug-in attachment 40.
  • a threaded receptacle 18 is formed into the base holder 10 at an angle to the plug-in receptacle 16.7. It ends at the end in the plug-in receptacle 16.7.
  • a pressure screw 50 is assigned to the thread receptacle 18.
  • the pressure screw 50 has a threaded section 51, a tool holder 53 and a pressure shoulder 52 opposite the tool holder 53. It can be screwed into the threaded receptacle 18 of the base holder 10 in such a way that the pressure projection 52 protrudes into the plug-in receptacle 16.7.
  • the plug-in receptacle 16.7 merges into the first support surfaces 16.1. These are sloping towards the plug-in receptacle 16.7 and aligned symmetrically to a central plane of the base holder 10.
  • a surface 17 is formed all around the thread receptacle 18. This is laterally delimited by projections projecting beyond the surface 17.
  • the projections form second support surfaces 16.2. This are aligned at an angle to each other and sloping towards the plug-in receptacle 16.7 and the central plane of the base holder 10. They are still arranged at an angle to the first support surfaces 16.1.
  • the first and second support surfaces 16.1, 16.2 thus each form prism-shaped contact surfaces for the support body 21 of the chisel holder 20.
  • the first and second support surfaces 16.1, 16.2 are aligned at an angle to one another and slope downward in the direction of the plug receptacle 16.2.
  • adjustment spaces 16.3, 16.4, 16.5 are formed in the form of depressions.
  • the adjustment space 16.5 formed between the second support surfaces 16.2 merges into the surface 17 delimiting the thread receptacle 18 via a recess 16.6.
  • the plug-in receptacle 16.7 and the adjacent support surfaces 16.1, 16.2 form a chisel holder receptacle 16.
  • Figure 3 shows the one in the Figures 1 and 2 Chisel holder 20 shown in a front view and Figure 4 in a rear view.
  • the feed direction V and thus the working direction of the chisel holder 20 are in the Figures 3 and 4 marked by the usual arrow representation.
  • the central transverse plane MQ running in the feed direction V forms a plane of symmetry of the bit holder 20.
  • the apron 22 of the support body 21 pointing in the feed direction V forms two first removal surfaces 23 aligned at an angle to one another on its side facing the plug-in projection 40.
  • the first removal surfaces 23 are preferably arranged mirror-symmetrically to the central transverse plane MQ. An asymmetrical arrangement is also conceivable.
  • the removal surfaces 23 are aligned obliquely to the central transverse plane MQ.
  • the first removal surfaces 23 form a first removal surface pair.
  • a transition section 23.1 can be provided between the first removal surfaces 23.
  • the first removal surfaces 23 preferably merge into the plug-in attachment 40 via a rounding transition 23.2.
  • the plug-in extension 40 has the two contact surfaces 41 arranged in mirror images of the central transverse plane MQ in the feed direction V. These can be separated from each other by a recess 43.
  • the support body 21 forms second removal surfaces 24 on its rear section relative to the feed direction V on its surface facing the plug-in projection 40.
  • the second removal surfaces 24 are angled and, based on the central transverse plane MQ, preferably aligned in mirror image to one another.
  • the second removal surfaces 24 can also be on both sides of the central transverse plane MQ, although they do not have to be mirror images of one another.
  • the second removal surfaces 24 form a second removal surface pair. They can be separated from one another, for example, by a throat-shaped transition section 24.1.
  • the transition section 24.1 can preferably run along the central transverse plane MQ of the bit holder 20.
  • the chisel holder 32 designed as a through hole, opens into the transition section 24.1.
  • a throat-shaped flushing channel 25 is guided to the chisel holder 32 in the opposite direction to the feed direction V.
  • the flushing channel 25 forms a radially aligned opening in the chisel holder 32.
  • first removal surfaces 23 can be interpreted as removal surfaces of the removal surface pair and one or both of the second removal surfaces 24 can be interpreted as further removal surface(s).
  • the two second removal surfaces 24 can also form the removal surfaces of the removal surface pair and one or both first removal surfaces 23 then form the further removal surface(s).
  • first/second removal surfaces 23/24 will continue to be used below
  • the plug-in extension 40 is inserted into the plug-in receptacle 16.7 until the support body 21 rests with its first removal surfaces 23 on the first support surfaces 16.1 and with its second removal surfaces 24 on the second support surfaces 16.2 of the base holder 10.
  • the removal surfaces 23, 24 and the associated support surfaces 16.1, 16.2 are each aligned accordingly.
  • the pressure screw 50 is screwed into the threaded receptacle 18 on the base holder 10.
  • the pressure attachment 52 engages in the pressure screw receptacle 42 of the plug-in attachment 40 and rests against the pressure surface 42.1 at its end.
  • the chisel holder 20 is thus axially blocked by the pressure screw 50.
  • the pressure screw 50 presses its contact surfaces 41 against the wall of the plug-in receptacle 16.7 due to its orientation, which runs obliquely to the longitudinal extent of the plug-in projection 40.
  • the pressure screw 50 braces the first and second removal surfaces 23, 24 relative to the assigned first and second support surfaces 16.1, 16.2.
  • the removal surfaces 23, 24, which run at an angle to the plug-in extension 40, enable an optimized transfer of force to the base holder 10 in the event of transverse forces acting on the chisel holder 20 from different directions as well as varying forces acting against the feed direction V, since at least one of the removal surfaces 23, 24 is connected to its surface normal is aligned approximately in the direction of the acting, resulting force.
  • the force transfer from the chisel holder 20 to the base holder 10 thus takes place to a large extent from the removal surfaces 23, 24 to the corresponding support surfaces 16.1, 16.2. This relieves the load on the plug-in attachment 40, particularly in its transition area to the support body 21. A premature fatigue fracture of the plug-in attachment 40 can thus be avoided.
  • Figure 5 shows a section of a tool system, each with a section of the holding section 30 of the bit holder 20, a support element 70 and a round shank bit 60 held in the bit holder 20.
  • a chisel head 61 of the round shank chisel 60 is completed with a collar 62 in the direction of the holding section 30 of the chisel holder 20.
  • the collar 62 forms a support surface 62.1 in the direction of the holding section 30. This rests on a support surface 72 of the support element 70.
  • the support surface 72 is formed within a receptacle 71 on the top of the support element 70. she is correspondingly delimited on the outside by an edge 71.1.
  • the support element 70 On the sides opposite the support surface 72, the support element 70 has a seat surface 73 with which it rests on the wear surface 31 of the holding section 30 of the chisel holder 20.
  • the support element 70 is constructed essentially rotationally symmetrical to a central longitudinal axis of the round shank chisel 60.
  • the seat surface 73 merges via a circumferential recess 75 into a centering counter surface 74.1 of a centering projection 74 which runs inclined to the central longitudinal axis of the support element 70.
  • the centering projection 74 of the support element 70 is inserted into the correspondingly shaped centering receptacle 33 of the chisel holder 20.
  • the centering counter surface 74.1 lies against a corresponding centering surface 33.1 of the centering receptacle 33.
  • the shoulder 34 of the holding section 30 engages in the recess 75.
  • the support element 70 has a receiving bore 77, through which a guide area 76 for guiding the round shank chisel 60 is formed.
  • a centering section 63 of a chisel shank of the round shank chisel 60 is assigned to the guide area 76.
  • a rotary bearing is created between the guide area 76 and the centering section 63. It is important to ensure that the outer diameter of the cylindrical centering section 63 is matched to the inner diameter of the receiving bore 77 in the guide area 76 so that free rotation between the support element 70 and the centering section 63 is maintained.
  • the play between these two components should be chosen so that the smallest possible lateral offset (transverse to the central longitudinal axis of the round shank chisel (60)) occurs.
  • the centering section 63 merges into the cylindrical chisel shaft, which is currently covered by a fastening sleeve 64.
  • the chisel shaft is held axially in the chisel holder 32 on the holding section 30 of the chisel holder 20 by means of the fastening sleeve 64.
  • the holder allows axial play 80.
  • the fastening sleeve 64 has a chamfer at its upper end.
  • the round shank bit 60 can rotate about its central longitudinal axis.
  • the free rotation ensures that the round shank chisel 60 wears evenly over its entire circumference.
  • the loosely placed support element 70 which is held by the centering section 63 of the chisel shaft, also rotates, whereby the rotatability of the round shank chisel 60 is further improved overall. Due to the rotation and the high mechanical load on the round shank chisel 60, the chisel holder 20 wears out, mainly in the upper section of the holding section 30. The wear surface 31 is abraded by the load. The existing wear of the holding section 30 can be assessed via the wear markings 30.1.
  • centering attachment 74 By engaging the centering attachment 74 in the centering receptacle 33 and the attachment 34 in the recess 75, lateral guidance of the support element 70 is achieved, which has a positive effect on the rotatability of the support element 70 and thus of the round shank chisel 60.
  • the centering surface 33.1 merges tangentially into the surface of the extension 34.
  • the surface of the extension 34 is rounded and transferred into the wear surface 31.
  • the centering counter surface 74.1 of the centering projection 74 of the support element 70 merges tangentially into the recess 75 and the surface of the recess 75 merges rounded into the seat surface 73 of the support element 70.
  • the approach 34 counteracts forces that act radially inwards on the support element 70.
  • the radially inner surface section of the extension 34 counteracts radially outwardly directed forces. This reduces the force that must be absorbed by the centering surface 33.1 of the holding section 30, which leads to reduced surface pressure in this area and correspondingly to reduced wear.
  • the guidance through the shoulder 34 counteracts a wobbling movement in the disk plane of the support element 70, which further reduces wear on the bit holder 20.
  • Figure 6 shows a schematic representation of the wear of the wear surface 31 of a known chisel holder 30 with an asymmetrical load on the support element 70, which is shaped complementary to the wear surface 31 and the centering receptacle 33.
  • the disk-shaped support element 70 is in the embodiment shown by a flat support surface 72 and an opposite, also just designed seat 73 limited.
  • the centering projection 74 is formed with its centering counter surface 74.1 all around the central receiving hole 77 on the seat surface 73.
  • the receiving bore 77 has an insertion phase 76.1. This makes it easier to insert the chisel shaft.
  • the asymmetrical load is represented by two arrows of different lengths, which symbolize a first force 83.1 and a comparatively larger second force 83.2.
  • the asymmetric introduction of force can be caused, for example, by the position of the bit holder 20 in relation to the direction of rotation of the milling drum.
  • Such an uneven axial load leads to asymmetrical wear on the wear surface 31 of the bit holder 20 in the event of a larger lateral movement (radial movement 82) of the support element 70.
  • This is due to a wear surface inclined by a wear angle 84 relative to a plane running perpendicular to the central longitudinal axis M 31 indicated.
  • the radial movement 82 is made possible if the lateral guidance of the support element 70 is inadequate.
  • the support element 70 guiding the round shank chisel 60 rests on the wear surface 31 at an angle to the central longitudinal axis M.
  • the receiving hole 77 is therefore not exactly aligned with the central longitudinal axis M of the chisel holder 32. This misalignment can hinder or prevent the smooth rotation of the round shank chisel 60. Furthermore, the uneven wear of the wear surface 31 leads to severe longitudinal wear of the holding section 30.
  • FIGS. 7 to 15 show in schematic side sectional views a section of a holding section 30 of the chisel holder 20 in the area of the centering receptacle 33. Of the rotationally symmetrical holding sections 30, only one half is shown up to the central longitudinal axis M of the holding section 30.
  • the schematic representations are not to scale.
  • the centering surface 33.1 of the centering receptacle 33 merges tangentially into the surface of the extension 34.
  • the approach 34 is rounded at its outer end and transferred into the wear surface 31 of the holding section 30.
  • the approach 34 is bead-shaped. It is arranged all around the centering receptacle 33.
  • the approach 34 protrudes over the wear surface 31.
  • the approach 34 forms a maximum point 37 at its highest point compared to the wear surface 31.
  • the transition from the centering surface 33.1 into the cylindrical lateral surface of the chisel receptacle 32 forms an end 36 of the centering receptacle 33.
  • a centering height 81 marked by a double arrow indicates the distance measured in the direction of the central longitudinal axis M between the end 36 of the centering receptacle 33 and the maximum point 37 of the Approach 34.
  • the approach 34 has a first radius 86 in a range between 0.5 mm and 6 mm, in this case 1.5 mm.
  • the height of the extension 34 relative to the wear surface 31 is preferably in a range between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.5 mm, in the present case 1.0 mm.
  • the approach 34 merges into the wear surface 31 via the rounded area with a second radius 87.
  • the transition from the approach 34 to the centering surface 33.1 of the centering receptacle 33 is continuous. Edges between the centering surface 33.1, the extension 34 and the wear surface 31 are thus avoided, whereby the free rotation of a mounted support element 70 about the central longitudinal axis M is improved.
  • the approach 34 is formed onto the holding section 30 during the production of the chisel holder 20.
  • the tool system When the tool system is mounted, it engages in the receptacle 75 of the support element 70, as shown in Figure 5 is shown.
  • the inner diameter D i 85 of the chisel holder 32 is marked by an arrow.
  • the centering height 81 is designed such that the ratio between the inner diameter D i 85 of the chisel holder 32 and the centering height 81 has a value less than 8.
  • the centering height 81 is given by the axial dimensioning of the centering receptacle 33 and the extension 34.
  • the centering height 81 is designed in such a way that it is larger than the axial play 80 of the round shank chisel 60 and thus of the support element 70.
  • the dimensioning of the centering height 81 depending on the inner diameter D i 85 of the chisel holder 32 takes the larger permissible axial play 80 into account for larger tool systems.
  • Asymmetrical wear of the wear surface 31 with an uneven load on the support element 70 can be avoided or at least significantly minimized. Due to the lack of angular displacement of the wear surface 31 relative to the central longitudinal axis M as a contact surface for the support element 70 and thus the round shank chisel 60, a consistently good rotation of the round shank chisel 60 and the support element 70 is achieved.
  • the easy rotation of the support element 70 and the round shank chisel 60 is further maintained by the rounded or continuous and therefore edge-free transitions between the centering surface 33.1, the shoulder 34 and the wear surface 31. Sharp transitions easily cause the support element 70 to tilt relative to the chisel holder 20, thereby preventing rotation. This can be avoided by using rounded or continuous transitions.
  • Figure 8 shows a holding section 30 in which, according to the invention, no shoulder 34 is provided which protrudes beyond the wear surface 31.
  • a guide groove 35 is formed into the wear surface 31.
  • the guide groove 35 runs around the centering receptacle 33 at a distance. It has a trapezoidal contour with side surfaces that are inclined to the wear surface 31.
  • the approach 34 is formed between the centering receptacle 33 and the guide groove 35. It also has a trapezoidal contour.
  • the extension 34 ends in the same plane as the wear surface 31 to the side of the guide groove 35.
  • the extension 34 merges directly into the inclined centering surface 33.1 of the centering receptacle 33.
  • the centering receptacle 33 is completed by the end 36 formed in the transition from the centering surface 33.1 to the lateral surface of the chisel receptacle 32.
  • the centering height 81 is measured in the direction of the central longitudinal axis M between the end 36 of the centering receptacle 33 and the upper surface of the extension 34, as shown by a double arrow.
  • the ratio between the inner diameter D i 85 of the chisel holder 32 and the centering height 81 is selected to be less than 8, in this case less than 6.5. This ensures good lateral guidance of the support element. With a ratio of less than 6.5, sufficient lateral guidance is achieved even towards the end of the service life of the support element 70 and the round shank chisel 60, if the axial play 80 of the round shank chisel 60 is possibly increased due to the wear that has already occurred.
  • the transition from the centering surface 33.1 to the shoulder 34 and/or the transition from the shoulder 34 to the adjacent side surface of the guide groove 35 and/or the transition from the opposite side surface of the guide groove 35 to the adjacent wear surface 31 can be rounded be.
  • the transitions from the side surfaces to the groove bottom can also be rounded off. Sharp edges can be avoided in this way. This leads to improved rotatability of the support element 70.
  • a trapezoidal guide groove 35 is also formed into the wear surface 31.
  • a projection 34 formed between the guide groove 35 and the centering receptacle 33 has a bead-shaped contour.
  • the radius of the extension 34 is chosen so that its surface is tangential to the centering surface 33.1 of the centering receptacle 33 and oppositely merges into the adjacent side surface of the guide groove 35.
  • the centering height 81 corresponds to the distance measured in the direction of the central longitudinal axis M between the end 36 of the centering receptacle 33 and the maximum point 37 of the extension 34.
  • the wear surface 31 of the in Figure 10 Holding section 30 shown goes directly into the centering surface 33.1 of the centering receptacle 33.
  • a bead-shaped extension 34 is molded onto it.
  • the centering height 81 is measured along the central longitudinal axis M between the end 36 of the centering receptacle 33 and the maximum point 37 of the approach 34.
  • the attachment 34 which is arranged comparatively far outside on the holding section 30, results in particularly good stabilization of the rotational movement of a correspondingly designed, adjacent support element 70.
  • a holding attachment 30 is shown with a multi-stage surface facing a support element 70 (not shown).
  • the centering surface 33.1 merges into a contact surface 38 arranged transversely to the central longitudinal axis M, in particular perpendicular to the central longitudinal axis M.
  • the contact surface 38 is adjoined by a projection 34 which projects beyond the contact surface 38.
  • the surface of the bead-shaped extension 34 merges tangentially into the adjacent side surface of a trapezoidal guide groove 35.
  • the wear surface 31 is arranged all around the guide groove.
  • the contact surface 38, the maximum point 37 of the extension 34, the groove bottom of the guide groove 35 and the wear surface 31 are arranged at different levels along the central longitudinal axis M.
  • the maximum point 37 measured parallel to the central longitudinal axis M, is the furthest away from the end 36 of the centering receptacle 33, followed by the contact surface 38, the wear surface 31 and the groove bottom of the guide groove 35. Due to this course of the front surface of the Holding section 30 provides very good lateral guidance corresponding to this trained support element 70 is achieved. Both lead to reduced wear on the holding section 30 and thus on the chisel holder 20.
  • lugs 34 arranged concentrically to one another are formed on the holding section 30 around the centering receptacle 33.
  • a wavy contour is thus formed, the surface of which represents the wear surface 31.
  • the centering height 81 is measured between the end 36 of the centering receptacle 33 and the maximum point 37 of the innermost extension 34. For adjacent approaches 34 of different heights, the centering height 81 is preferably determined at the maximum point 37 of the highest approach 34.
  • the lugs 34 arranged all around the centering receptacle 33 ensure good rotatability of a corresponding support element 70.
  • the surface of the holding section 30 projected in the axial direction remains equal to a flat surface, so that the axial supporting effect is maintained.
  • the radially effective area is significantly increased by the side flanks of the approaches 34. This means that lateral forces can be better absorbed.
  • the wave shape increases the contact area between a support element 70 and the holding section 30 of the bit holder 20. This leads to reduced wear on the chisel holder 20 and to improved rotatability of the support element 70 and thus of the round shank chisel 60.
  • Figure 13 shows a section of a chisel holder 20 with a flat wear surface 31, onto which two concentric, bead-shaped projections 34 are formed. This arrangement also achieves good rotation and good lateral stabilization.
  • the in Figure 14 Chisel holder 20 shown has a wear surface 31 that runs in a straight line but is oriented obliquely to the central longitudinal axis M.
  • the maximum point 37 is formed in the rounded transition area from the centering surface 33.1 into the wear surface 31. Due to their orientation obliquely to the central longitudinal axis M, both the centering surface 33.1 and the wear surface 31 have a radially stabilizing effect on the position of a device in its contour Seat surface 73 of the support element 70 adapted to the wear surface 31.
  • the centering height 81 is measured in the direction of the central longitudinal axis M from the end 36 of the centering receptacle 33 to the maximum point 37 at the transition from the centering surface 33.1 to the wear surface 31.
  • Figure 15 shows a holding section 30 in which, according to the invention, no shoulder 34 is provided which protrudes beyond the wear surface 31.
  • the wear surface 31 runs obliquely to the central longitudinal axis M of the holding section 30.
  • the largest distance measured in the direction of the central longitudinal axis M between the end 36 of the centering receptacle 33 and the wear surface 31 results from the outer edge of the holding section 30, so that this distance is the centering height 81 forms.
  • both the centering surface 33.1 and the wear surface 31, which is aligned obliquely to the central longitudinal axis M have a radially stabilizing effect on a correspondingly shaped, adjacent support element 70.
  • the longitudinal wear of the holding section 30 can be significantly reduced with respect to the operating time of the tool system. Tilting of the round shank chisel 60 during startup can be virtually avoided due to the improved and more stable engagement of the lug(s) 34 in corresponding recesses 75 of a support element 70. The length wear of the holding section 30 is thereby evened out.
  • the chisel shaft and the chisel holder 32 are better protected from contamination by the increased sealing effect of the support surface between the support element 70 and the holding section 30. This also leads to significantly reduced wear on the bit holder 20 in the area of its holding section 30.
  • the measures can significantly increase the life expectancy of the chisel holder 20 as a structural unit. This leads to reduced maintenance and spare parts costs.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Road Repair (AREA)

Claims (12)

  1. Porte-burin (20) pour une machine de travail du sol, comprenant un corps d'appui (21) sur lequel est formée, dans la zone d'un côté de travail, une section de retenue (30) qui présente un logement de burin (32), la section de retenue (30) étant fermée à son extrémité opposée au corps d'appui (21) par une surface d'usure (31) entourant le logement de burin (32) pour l'application d'un burin à tige ronde (60) ou d'un élément d'appui (70), le logement de burin (32) étant fermé par une surface de centrage (33. 1) d'un logement de centrage (33) est transférée directement ou indirectement dans la surface d'usure (31) et un embout d'enfichage (40) étant formé sur le corps d'appui (21) du côté opposé à la section de retenue (30),
    caractérisé
    en ce que qu'une hauteur de centrage (81) mesurée dans la direction de l'axe longitudinal central (M), qui s'étend entre une extrémité (36) du logement de centrage (33) opposée à la surface d'usure (31) et un point maximal (37) d'un appendice (34) dépassant de la surface d'usure (31), est conçue de telle sorte, que le rapport entre le diamètre intérieur (85) du logement de burin (32) et la hauteur de centrage (81) est inférieur à 8, et que le corps d'appui (21) présente une ou plusieurs surfaces d'enlèvement (23, 24) sur son côté opposé à la section de retenue (30), l'une des surfaces d'enlèvement (23, 24) s'étendant de part et d'autre d'un plan médian qui reçoit l'axe central (M) et s'étend en direction de la direction d'avance (V), ou qu'au moins une surface d'enlèvement (23, 24) s'étend respectivement de part et d'autre de ce plan médian.
  2. Porte-burin (20) selon la revendication 1, caractérisé en ce que le rapport entre le diamètre intérieur (85) du logement de burin (32) et la hauteur de centrage (81) est inférieur à 7,5, de préférence inférieur à 7,0, de manière particulièrement préférée inférieur à 6,5.
  3. Porte-burin (20) selon la revendication 1 ou 2, caractérisé en ce que l'appendice (34) est disposé de manière périphérique par rapport au logement de burin (32).
  4. Porte-burin (20) selon l'une des revendications 1 à 3, caractérisé en ce que plusieurs appendices (34) de hauteur identique ou différente sont formés sur la surface d'usure (31) de la section de retenue (30) et en ce que le rapport entre le diamètre intérieur Di (85) du logement de burin (32) et la hauteur de centrage (81) par rapport à l'un des appendices (34), de préférence le rapport entre le diamètre intérieur Di (58) du logement de burin (32) et la plus grande hauteur de centrage (81) déterminée par rapport à un appendice (35), est inférieur à 8.
  5. Porte-burin (20) selon l'une des revendications 1 à 4, caractérisé en ce qu'une rainure de guidage (35) est formée dans la surface d'usure (31) adjacente, à distance et en périphérie du logement de centrage (33).
  6. Porte-burin (20) selon la revendication 5, caractérisé en ce que l'appendice (34) est formé entre le logement de centrage (33) et la rainure de guidage (35) et en ce que le logement de centrage (33) présente, par rapport à la surface d'usure (31) voisine, une profondeur plus grande que la rainure de guidage (35).
  7. Porte-burin (20) selon l'une des revendications 1 à 6, caractérisé en ce que les transitions entre la surface de centrage (33.1), la surface d'usure (31), l'appendice (34) et/ou la rainure de guidage (35) sont continues ou arrondies.
  8. Porte-burin (20) selon l'une des revendications 1 à 7, caractérisé en ce que la hauteur de l'appendice (34) par rapport à la surface d'usure (31) est supérieure ou égale à 0,3 mm, de préférence comprise entre 0,3 mm et 2 mm, de manière particulièrement préférée entre 0,5 mm et 1,5 mm.
  9. Porte-burin (20) selon l'une des revendications 1 à 8, caractérisé en ce que le diamètre intérieur Di (85) est de 20 mm et la hauteur de centrage (81) est supérieure à 2,5 mm ou en ce que le diamètre intérieur Di (85) est de 22 mm et la hauteur de centrage (81) est supérieure à 2,75 mm ou en ce que le diamètre intérieur Di (85) est de 25 mm et la hauteur de centrage (81) est supérieure à 3,125 mm ou en ce que le diamètre intérieur Di (82) est de 42 mm et la hauteur de centrage (81) est supérieure à 5,25 mm.
  10. Porte-burin (20) selon l'une des revendications 1 à 9, caractérisé en ce que l'appendice (34) et/ou la rainure de guidage (35) sont appliqués sur la surface d'usure (31) par un procédé de fabrication par enlèvement de copeaux, notamment par tournage, lamage, fraisage lors de la fabrication du porte-burin (20).
  11. Porte-burin (20) selon la revendication 10, caractérisé en ce que l'appendice (34) et/ou la rainure de guidage (35) sont appliqués sur la surface d'usure (31) par tournage, lamage, fraisage lors de la fabrication du porte-burin (20).
  12. Porte-burin (20) selon l'une des revendications 1 à 11, caractérisé en ce que le corps d'appui (21) présente au moins une autre surface d'enlèvement (23, 24) qui forme un angle avec les deux surfaces d'enlèvement (23, 24) de la paire de surfaces d'enlèvement.
EP18197493.2A 2017-10-09 2018-09-28 Porte-burin Active EP3467255B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017123368.7A DE102017123368A1 (de) 2017-10-09 2017-10-09 Meißelhalter

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EP3467255A1 EP3467255A1 (fr) 2019-04-10
EP3467255B1 true EP3467255B1 (fr) 2023-12-20
EP3467255C0 EP3467255C0 (fr) 2023-12-20

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US (1) US20190106988A1 (fr)
EP (1) EP3467255B1 (fr)
CN (2) CN209384074U (fr)
DE (1) DE102017123368A1 (fr)
ES (1) ES2970564T3 (fr)
PL (1) PL3467255T3 (fr)

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DE102017123368A1 (de) * 2017-10-09 2019-04-11 Wirtgen Gmbh Meißelhalter
CN110924284A (zh) * 2019-12-17 2020-03-27 苏州五元素机械制造有限公司 快换刀架的切割装置
CN110983927A (zh) * 2019-12-17 2020-04-10 苏州五元素机械制造有限公司 具有紧固部件的切割装置
US11585217B2 (en) 2021-03-11 2023-02-21 Kennametal Inc. Washerless cutting tool assembly
USD982633S1 (en) 2021-03-11 2023-04-04 Kennametal Inc. Washerless cutting tool assembly
DE102021112757A1 (de) * 2021-05-17 2022-11-17 Bomag Gmbh WECHSELHALTER, MEIßELWECHSELHALTERSYSTEM, FRÄSWALZE FÜR EINE STRAßENFRÄSMASCHINE UND STRAßENFRÄSMASCHINE

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DE3144060C2 (de) * 1981-11-06 1985-01-31 Wolfgang 6603 Sulzbach Preinfalk Axialhalterung für Schrämmeißel
SE461165B (sv) * 1987-06-12 1990-01-15 Hans Olav Norman Verktyg foer brytning, avverkning eller bearbetning av fasta material
US6824225B2 (en) 2001-09-10 2004-11-30 Kennametal Inc. Embossed washer
US7832808B2 (en) * 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
AT10912U1 (de) * 2008-09-26 2009-12-15 Schwamborn Geraetebau Gmbh Rundschaftmeissel für meisselfräsen sowie befestigung
DE102009049780B4 (de) * 2009-10-19 2016-02-18 Betek Gmbh & Co. Kg Meißel, insbesondere Rundschaftmeißel
SI2646653T1 (sl) * 2010-12-03 2021-08-31 Wirtgen Gmbh Držalo dleta
DE102011051525A1 (de) * 2011-07-04 2013-01-10 Wirtgen Gmbh Meißelhalter für eine Bodenbearbeitungsmaschine
DE102014104040A1 (de) * 2014-03-24 2015-09-24 Betek Gmbh & Co. Kg Meißel, insbesondere Rundschaftmeißel
CN204530413U (zh) * 2015-04-09 2015-08-05 中联重科股份有限公司 铣刨刀具及具有其的铣刨机
DE102016108808A1 (de) * 2016-05-12 2017-11-16 Betek Gmbh & Co. Kg Meißel mit einem Stützelement mit einem Zentrieransatz
DE102017123368A1 (de) * 2017-10-09 2019-04-11 Wirtgen Gmbh Meißelhalter

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CN109629383B (zh) 2021-11-23
US20190106988A1 (en) 2019-04-11
ES2970564T3 (es) 2024-05-29
EP3467255A1 (fr) 2019-04-10
DE102017123368A1 (de) 2019-04-11
PL3467255T3 (pl) 2024-05-06
CN209384074U (zh) 2019-09-13
CN109629383A (zh) 2019-04-16
EP3467255C0 (fr) 2023-12-20

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