EP2729666B1 - Porte-outil pour une machine de travail du sol - Google Patents

Porte-outil pour une machine de travail du sol Download PDF

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Publication number
EP2729666B1
EP2729666B1 EP12733049.6A EP12733049A EP2729666B1 EP 2729666 B1 EP2729666 B1 EP 2729666B1 EP 12733049 A EP12733049 A EP 12733049A EP 2729666 B1 EP2729666 B1 EP 2729666B1
Authority
EP
European Patent Office
Prior art keywords
plug
abutment surfaces
chisel holder
attachment
pair
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
EP12733049.6A
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German (de)
English (en)
Other versions
EP2729666A2 (fr
Inventor
Thomas Lehnert
Karsten Buhr
Cyrus Barimani
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
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Wirtgen GmbH
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Filing date
Publication date
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Publication of EP2729666A2 publication Critical patent/EP2729666A2/fr
Application granted granted Critical
Publication of EP2729666B1 publication Critical patent/EP2729666B1/fr
Active legal-status Critical Current
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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
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • 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
    • 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
    • E21C35/191—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
    • E21C35/1933—Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank

Definitions

  • the invention relates to a chisel holder for a soil tillage machine, in particular a road milling machine, which has a chisel receptacle in the area of a working side of a support body and which directly or indirectly carries a plug-in lug on a plug-in lug side of the support body, the support body having two cutting surfaces forming a pair of cutting surfaces, which are mutually stand angle.
  • a chisel holder which forms a support body with a one-piece plug-in attachment.
  • the support body is penetrated by a cylindrical bore designed as a chisel receptacle.
  • a machining tool in this case a point-shaft chisel, can be inserted into the chisel holder.
  • the support body has two removal surfaces which are at an angle to one another and which are used for support on corresponding support surfaces of a base part.
  • the base part has a plug-in receptacle into which the chisel holder can be used in an exchangeable manner with its plug-in attachment. When assembled, the removal surfaces of the chisel holder are in contact with the support surfaces of the base part. In order to maintain a fixed surface assignment, a clamping screw is used, which clamps the socket in the socket of the base part.
  • the machining tool engages in the subsurface to be machined.
  • high machining forces are transmitted and diverted from the chisel holder to the base part.
  • the direction of the force and also the amount vary under otherwise identical conditions, solely due to the fact that the machining tool forms a chip (comma chip) that thickens from the entry point to the exit point.
  • the direction and amount of force varies depending on various parameters, such as the milling depth, the feed rate, the material to be processed, etc.
  • A1 another bit holder is known. This has a support body which is supported by projections on a base part. A clamping part is formed on the support body and can be connected to the base part via wedge connections.
  • the chisel holder is from the U.S. 4,828,327 known.
  • the chisel holder is designed as a solid block, which is penetrated by a chisel holder.
  • the chisel holder has a threaded mount which is aligned with a screw mount of a base part.
  • a fastening screw can be guided through the screw mount and screwed into the threaded mount of the chisel holder.
  • the fastening screw is tightened, the chisel holder is drawn into an L-shaped recess in the base part and is supported there on support surfaces.
  • the chisel holders are usually arranged protruding on the surface of a milling drum tube.
  • U1 discloses a knife holder having a knife mount. This knife holder is arranged in the area of a processing side. The knife holder is introduced into a support body 40 of the knife holder. The support body carries a plug-in attachment on a plug-in attachment side. In the area of the plug-in attachment side, the support body has four guide surfaces, via which the material removed during the machining operation can be diverted.
  • a change holder system with a chisel holder and a base part is known.
  • the base part is used to hold the chisel holder.
  • the chisel holder has a plug-in attachment that can be inserted into a plug-in receptacle in the base part.
  • the plug-in attachment On its rear side, which is opposite to the feed direction, the plug-in attachment has bearing surfaces. With these, the plug-in approach is supported on associated mating surfaces of the plug-in receptacle.
  • the chisel holder has support surfaces that are held in the area in front of the socket and that are supported on the upper side of the base part.
  • Fastening screws are provided for fastening the chisel holder in the base part. These are screwed into threaded receptacles in the base part and act on the plug-in attachment.
  • This document shows a bit holder with the features of the preamble of claim 1.
  • the support body has a further removal surface, which is at an angle to the two removal surfaces of the pair of removal surfaces, that the two removal surfaces of the pair of removal surfaces are at least partially in front of the plug-in attachment in the feed direction of the chisel holder, and a further removal surface is at least partially behind it, counter to the feed direction the plug-in approach are arranged.
  • the two removal surfaces of the pair of removal surfaces are arranged at least partially behind the plug-in attachment against the feed direction and another removal surface is arranged at least partially in front of the plug-in attachment in the feed direction.
  • Three transfer surfaces are provided on the chisel holder, which are used to transfer the load to the base part.
  • the three removal surfaces are at an angle to each other and thus form a three-sided support, similar to a pyramid with a triangular base. This support guarantees that the chisel holder is firmly seated on the base part, even when the direction of the machining force changes.
  • the three removal surfaces also relieve the plug-in attachment.
  • one or more additional removal surfaces can also be combined in order to adapt the chisel holder to a specific work task.
  • four removal surfaces can also be used, all of which are at an angle to one another.
  • the distribution of the removal surfaces and the further removal surface on the areas of the chisel holder in front of the plug-in shoulder and behind the plug-in shoulder takes into account the force ratios during the machining operation in an optimal manner.
  • a thickening chip forms from the entry point to the exit point of the machining tool.
  • the direction of the machining forces at the beginning of the use of the tool is such that the bit holder is loaded in front of the plug-in attachment.
  • the direction of the machining force then changes, so that the areas behind the plug-in attachment are increasingly stressed.
  • the arrangement of the removal surfaces described above optimally takes into account the resulting load conditions.
  • a load-optimized construction results from the fact that the two removal surfaces of the pair of removal surfaces and the at least one further removal surface diverge from the plug-in attachment side in the direction of the processing side.
  • the diverging transfer surfaces also form a prism-shaped support in the area of the plug attachment side and enable reliable force transfer to the outside.
  • a particularly preferred embodiment of the invention provides that the at least one further removal surface is designed essentially symmetrically to the central transverse plane running in the direction of the central longitudinal axis of the plug-in attachment . Due to the fact that the chisel holder is designed symmetrically at its surface areas of the removal surfaces that come into contact with the base part, the same load conditions are achieved in the different mounting positions.
  • the front apron usually covers a front area of the base part and thus protects it from wear. The fact that the front apron is now also used to attach the removal surface results in a compact design and the chisel holder can be easily manufactured.
  • the flat additional removal surface offers reliable support here.
  • the removal surfaces of the pair of removal surfaces and the further removal surface can form a three-surface support guide. Accordingly, the three removal surfaces form a pyramid with a triangular base as a support guide.
  • the surface normals of the removal surfaces of the removal surface pair each point to their bit holder side seen in the tool feed direction. Accordingly, the removal surfaces of the pair of removal surfaces are arranged at an angle to the axis of rotation of the milling drum tube, for example when using the bit holder on a milling drum tube. This arrangement allows the transverse forces to be reliably dissipated.
  • a reliable assembly of the chisel holder in a base part is then also possible in rough construction site operation and at confusing places if it is provided that the removal surfaces of the removal surface pair enclose an obtuse angle, in particular in the range between 100° and 140°.
  • This construction also prevents, even after a long period of use, during which the removal surfaces may move a little farther than the support surfaces process, a deadlock occurs. This means that the chisel holder can always be easily changed.
  • this angled setting of the removal surfaces guarantees reliable removal of the machining forces. In particular, the variance of the machining forces during tool engagement is taken into account.
  • the chisel holder can be such that the removal surfaces of the pair of removal surfaces and/or the at least one further removal surface are connected to one another at least in certain areas via a transition section in the area of the plug attachment side. Accordingly, the ablation surfaces do not meet at the apex of the angle, so that there is no sharp-edged angle transition that can be damaged.
  • a repositioning area can also be created with the transition section and in conjunction with the base part. Accordingly, when the removal surfaces and/or the support surfaces of the base part wear away, the chisel holder can continuously move into this repositioning space, the removal surfaces always remaining in contact with the support surfaces. In particular, the flat surface is maintained even if the chisel holder of the existing base part has to be replaced with a new one, and that several times.
  • the plug-in attachment is at least partially connected to the plug-in attachment side in the area of the removal surfaces of the pair of removal surfaces and/or the at least one additional removal surface. This enables the removal surfaces to be assigned directly to the plug-in attachment, which leads to a smaller component size and also offers an optimized flow of forces.
  • the chisel holder can be characterized in that the longitudinal axis of the plug-in attachment and the central longitudinal axis of the prism formed by the removal faces of the pair of removal faces enclose an angle in the range between 100° and 130°.
  • an optimal power flow is achieved by this design feature.
  • a chisel holder on the chisel holder for example a hole for accommodating a machining tool, in particular a point-shank chisel
  • the central longitudinal axis of the chisel holder is arranged at least in regions between the removal surfaces of the removal surface pair. In this way, on the one hand, a good force distribution of the machining forces introduced via the machining tool on both removal surfaces can be achieved.
  • the chisel holder can also be positioned in different orientations to a milling drum tube, with the reliable power transmission being maintained.
  • the angle between the central longitudinal axis of the prism formed by the removal surfaces of the removal surface pair and the central longitudinal axis of the chisel holder is in the range between 40° and 90°, particularly preferably between 50° and 80°.
  • the chisel receptacle merges into a scavenging channel, and that the scavenging channel exits at least in some areas in the area between the removal surfaces of the removal surface pair.
  • the scavenging channel is therefore arranged in such a way that the removal surfaces do not meet in a pointed manner.
  • a first removal surface of the pair of removal surfaces and the at least one further removal surface are set at an angle to one another, preferably in the range between 100° and 140°, and form a support area
  • the chisel holder can also be arranged in a corresponding manner configured angled chisel holder receptacle of the base part are used and stably supported therein.
  • the opening angle maps a wide range of directions from which forces can act during tool engagement and through changes in other parameters.
  • a particularly preferred variant is such that between the removal faces of the pair of removal faces there is a plane that accommodates the bisecting line, and that the longitudinal axis of the plug-in attachment is arranged symmetrically to this plane. Due to this symmetrical design, the chisel holder can also be attached to different mounting positions of a milling drum tube or the like, or this has the advantage that only one variant is required and you do not have to work with left and right chisel holders.
  • the central longitudinal axis of the plug-in attachment is in the angle range of -10° to +10° to the bisecting line formed between the central longitudinal axis of the removal surfaces of the removal surface pair and the further removal surface.
  • a uniform prestress is thus applied when the chisel holder is braced with the base part. Provision is particularly preferably made for this angular range to be from ⁇ 2° to +2°.
  • figure 1 shows a tool combination consisting of a base part 10 and a chisel holder 20.
  • the chisel holder 20 is connected to the base part 10 in an exchangeable manner.
  • the base part 10 has a solid base body 13 which has a lower connection side 11 .
  • This connection side 11 is concavely curved, with the curvature being selected in accordance with the outer diameter of a milling drum tube. In this way, the base part 10 can be placed with its connection side 11 on the outside of the milling drum tube and welded to it.
  • the base body 13 has a projection at the front, which is delimited at the side by inclined surfaces 14 and at the front by inclined surfaces 15 .
  • the inclined surfaces 15 are set at an angle to one another and the inclined surfaces 14 connect to the inclined surfaces 15 at an angle. This results an arrow-shaped geometry of the base part 10 at the front, which leads to a better clearing effect of the base part 10 .
  • a chisel holder receptacle 16 with a plug-in receptacle 16.7 is incorporated into the base part 10 .
  • the plug-in receptacle 16.7 penetrates the base body 13 completely and thus opens out into the connection side 11.
  • a threaded receptacle 18 is worked into the base part 10, which opens out into the plug-in receptacle 16.7 (see figure 12 ).
  • the chisel holder receptacle 16 has first support surfaces 16.1 and second support surfaces 16.2.
  • the first support surfaces 16.1 form a first pair of support surfaces and the second support surfaces 16.2 form a second pair of support surfaces.
  • the support surfaces 16.1, 16.2 are arranged at an angle to one another in each pair of support surfaces.
  • the support surfaces 16.1 are also set at an angle to the support surfaces 16.2, so that an obtuse-angled chisel holder receptacle 16 results.
  • repositioning spaces 16.3, 16.4, 16.5 are provided in the form of recesses.
  • a recess 16.6 is also provided, which creates a transition from the chisel holder receptacle 16 to the threaded receptacle 18.
  • a surface 17 is formed around the entry into the threaded receptacle 18, which is laterally delimited by sloping surfaces, the sloping surfaces opening diverging toward the back of the base part 10. In this way, the surface 17 and thus a tool holder 43 of a pressure screw 40 can be easily cleaned.
  • the pressure screw 40 has a threaded section 41 with which it can be screwed into the threaded receptacle 18 .
  • the pressure screw 40 is designed with a pressure attachment 42 in the form of a truncated cone-shaped pin which is integrally formed on the threaded section 41 .
  • the bit holder 20 can be connected to the base part 10 .
  • the chisel holder 20 has a support body 21 which is equipped with an apron 22 on the front side.
  • the apron 22 carries a web 22.1 formed in one piece and rising from the apron 22 upwards.
  • To the support body 21 is also a lug 23 coupled in one piece, terminating in a cylindrical portion 24.
  • the cylindrical section 24 is provided with wear markings, which in the present case are in the form of circumferential grooves 26 .
  • the cylindrical section 24 terminates in a support surface 25 which runs concentrically around the entry point of a chisel holder 27 .
  • the chisel receptacle 27 transitions into the support surface 25 via a chamfer-shaped insertion section 27.1.
  • the chisel holder 27 is designed as a through hole.
  • the support body 21 is provided with a recess on the back, which serves as a flushing channel 28 .
  • the scavenging channel 28 therefore opens the chisel receptacle 27 radially outwards in the region of its bore exit.
  • debris particles that have entered the chisel receptacle 27 can be discharged radially outwards through the scavenging channel 28 .
  • FIG 3 shows that the support body 21 has first removal surfaces 29.1 in the area of the apron 22. These removal surfaces 29.1 are at an obtuse angle ⁇ 1 to one another (see figure 13 ) and are connected to one another via a transition section 29.2. The angle ⁇ 1 between the first removal surfaces 29.1 corresponds to the angle between the first support surfaces 16.1 of the base part 10.
  • figure 4 shows that the back of the support body 21 has second removal surfaces 29.4 pointing downwards.
  • the second removal surfaces 29.4 are at an angle ⁇ 2 to one another (see figure 14 ), the angle ⁇ 2 between the second removal surfaces 29.4 also corresponding here to the angle between the second support surfaces 16.2 of the base part 10. While the first removal surfaces 29.1 merge into one another by means of the transition section 29.2, a transition area is formed between the second removal surfaces 29.4 by the scavenging channel 28 and a transition section 29.5.
  • the removal surfaces 29.1 and 29.4 each form pairs of removal surfaces in the form of a prism.
  • these prisms have a central longitudinal axis MLL, which is in the bisecting plane between the two first removal surfaces 29.1 or the second removal surfaces 29.4 is formed.
  • these bisecting planes are marked with WE.
  • the central longitudinal axis is indicated there by MLL, with the central longitudinal axis MLL in principle being able to lie at any desired position within the bisecting plane.
  • the Figures 3 and 4 show in conjunction with the Figures 13 and 14 that the first removal surfaces 29.1 and also the second removal surfaces 29.4, starting from the plug-in attachment side, diverge towards the processing side.
  • the surface normals converge accordingly on the removal surfaces 29.1, 29.4 from the plug-in attachment side to the processing side. The surface normals therefore converge in the area of the tool engagement point, where the machining forces are introduced into the tool system.
  • first removal surfaces 29.1 can be interpreted as removal surfaces of the pair of removal surfaces and one or both of the second removal surfaces 29.4 as further removal surface(s).
  • the two second removal surfaces 29.4 can also form the removal surfaces of the pair of removal surfaces and one or both first removal surfaces 29.1 then form the further removal surface(s).
  • first/second removal surfaces 29.1/29.4 will continue to be used below.
  • a comma chip is created during tool engagement. With this chip formation, not only does the amount of force change, but also the direction of the force. Accordingly, at the start of the tool engagement, the machining force acts in such a way that it tends to be dissipated via the pair of removal surfaces formed by the first removal surfaces 29.1.
  • the direction of the machining force rotates and is then increasingly derived via the pair of removal surfaces formed by the second removal surfaces 29.4. Accordingly, the angle ⁇ ' (see figure 5 ) be formed between the pairs of ablation surfaces so that the variance of the Machining force is taken into account, and this machining force always acts on the prisms formed by the pairs of removal surfaces.
  • the central transverse plane MQ of the bit holder 20 is marked.
  • the chisel holder is constructed mirror-symmetrically to this central transverse plane MQ, so that it can be installed on a milling drum as a right or left part.
  • the processing force does not only act in the direction of the image plane figure 5 , but rather also in the transverse direction.
  • These transverse force components are then ideally intercepted via the angular position ( ⁇ 1 , ⁇ 2 ) of the removal surfaces 29.1, 29.4. Since the machining forces scatter less in the transverse direction at the beginning of the tool engagement, the angle ⁇ 1 can also be selected to be smaller than ⁇ 2 .
  • figure 5 also shows that a plug-in extension 30 is formed in one piece on the support body 21 and merges into the first removal surfaces 29.1 and the second removal surfaces 29.4 via a rounded transition 29.3.
  • the plug-in attachment 30 is arranged in such a way that it essentially adjoins the support body 21, in the present case approximately 90%, in the area of the first removal surfaces 29.1.
  • the plug-in projection 30 carries two contact surfaces 31.1 on the front. These are how figure 3 can be seen, designed as convex cylindrical surfaces.
  • the contact surfaces 31.1 extend lengthwise and parallel to the central longitudinal axis M (see Fig. figure 5 ) of the plug-in extension 30.
  • the contact surfaces 31.1 are therefore also parallel to one another.
  • the contact surfaces 31.1 are spaced apart from one another in the circumferential direction of the plug-in attachment 30 . They have the same radius of curvature and are arranged on a common pitch circle. The radius of curvature corresponds to half the pitch circle diameter.
  • a Recess 31.2 provided, wherein the contact surfaces 31.1 run parallel to the recess 31.2.
  • the recess can have a wide variety of shapes, for example it can be a simple reflection.
  • the recess 31.2 forms a trough which is concavely troughed between the contact surfaces 31.1.
  • the concavity is designed in such a way that a part-cylindrical geometry results.
  • the recess 31.2 does not extend over the entire length of the plug-in attachment 30, but only over a partial area, like this 13 reveals.
  • the recess 31.2 is open to the free end of the plug-in extension 30, ie in the plug-in direction.
  • the recess 31.2 also opens radially outward without an undercut.
  • the plug-in attachment 30 has a pressure screw receptacle 32 on the back, which is equipped with a pressure surface 32.1.
  • FIGS. 6 and 9 illustrate that the recess 31.2 between the two contact surfaces 31.1 has a concave geometry, and in particular can form a part-cylindrical cross-section.
  • FIGs 7 to 10 is the design of the plug-in approach 30 in more detail.
  • figure 9 clearly shows the concave curvature of the recess 31.2, which adjoins the convex contact surfaces 31.1.
  • the plug-in projection 30 essentially has a circular or oval cross-sectional shape in its area adjoining the contact surfaces 31.1.
  • figure 8 illustrates the area of the pressure screw receptacle 32, the pressure surface 32.1 being set at an angle ⁇ to the central longitudinal axis M of the plug-in attachment 30. In this case, this setting angle ⁇ is preferably in the range between 20° and 60° in order to achieve an optimal retraction effect of the chisel holder 20 .
  • figure 7 also shows that the pressure surface 32.1 is arranged at a distance from the connection area of the plug-in attachment 30 to the support body 21 by the distance A.
  • the contact surfaces 31.1 are spaced apart by the distance B from the connection area of the plug-in attachment 30 to the support body 21. Of the centroid of the contact surfaces 31.1 is arranged at a distance from the centroid of the pressure surface 32.1 by the distance dimension C.
  • the plug-in attachment 30 is inserted into the plug-in receptacle 16.7.
  • the insertion movement is limited with the first and second removal surfaces 29.1, 29.4 abutting against the first and second support surfaces 16.1, 16.2.
  • the assignment is such that the transition section 29.2 is above the repositioning space 16.4, the repositioning space 16.5 is bridged by the transition section 29.5 and the lateral repositioning spaces 16.3 are bridged by the angular range between the first and second removal surfaces 29.1, 29.4 is formed.
  • the spacing of the chisel holder 20 in the area of these repositioning spaces 16.3, 16.4, 16.5 ensures that the chisel holder 20 can reposition itself in the repositioning spaces 16.3, 16.4, 16.5 during the machining operation if the removal surfaces 29.1, 29.4 and/or the support surfaces 16.1 , 16.2.
  • the pressure screw 40 is screwed into the threaded mount 18 to fix the prescribed installation state.
  • the pressure shoulder 42 presses with its flat end surface onto the pressure surface 32.1 and thus causes a pull-in force that acts in the direction of the central longitudinal axis M of the plug-in attachment 30.
  • the pressure screw 40 is also set at an angle to the central longitudinal axis M of the plug-in attachment 30 in such a way that a clamping force acting in the direction of the front is also introduced into the plug-in attachment 30 .
  • This clamping force is transmitted via the contact surfaces 31.1 into the corresponding concave mating surface of the cylindrical section of the plug-in receptacle 16.7.
  • the spacing of the contact surfaces 31.1 via the recess 31.2 guarantees that the plug-in attachment 30 is reliably fixed via the two support areas formed laterally by the contact surfaces 31.1. In this way, the surface pressures that occur are kept low, in particular via the two contact surfaces 31.1, which leads to reliable fixing of the plug-in attachment 30.
  • the chisel holder 20 can be repositioned in the repositioning spaces 16.3, 16.4, 16.5 in the event of wear, wear can be effectively compensated for, with the wear surfaces 29.1, 29.4 protruding beyond the support surfaces 16.1, 16.2 at every point, so that in the event of wear the Supporting surfaces 16.1, 16.2 are worn evenly without a so-called beard or burr occurring.
  • This configuration is particularly advantageous when the base part 10 has a service life that lasts for several life cycles of chisel holders 20, as is usually required. Unworn chisel holders 20 can then always be securely braced and held on a partially worn base part 10 .
  • the repair of a machine in which the tool system formed from the base part 10 and the chisel holder 20 is used is simple.
  • a large number of tool systems are usually mounted on such a machine, for example a road milling machine or a surface miner.
  • the base part is usually welded onto the surface of a milling roller tube. If all or some of the chisel holders 20 are worn out, they can simply be exchanged for new unworn or partially worn chisel holders 20 (which can be used, for example, for rough removal work).
  • the pressure screw 40 When replacing, the pressure screw 40 is first loosened. Then the worn chisel holder 20 can be pulled out with its socket 30 from the socket 16.7 of the base part 10 and removed. The new (or partially worn) chisel holder 20 is then inserted with its plug-in attachment 30 into the plug-in receptacle 16.7 of the base part 10. Now the pressure screw 40 can be replaced with a new one if necessary. It is then screwed into the base part 10 and clamped to the chisel holder 20 in the manner described above.
  • FIG 12 shows that the base part 10 carries a projection 50 which protrudes into the plug-in receptacle 16.7.
  • this projection 50 is formed by a cylindrical pin which is driven into a partially cylindrical recess 19 from the connection side 11 .
  • the part-cylindrical recess 19 surrounds it the cylindrical pin by more than 180° of its circumference so that it cannot be lost.
  • the region of the cylindrical pin protruding into the chisel receptacle 27 engages in the recess 31.2 between the contact surfaces 31.1.
  • figure 5 shows that the central longitudinal axis 24.1 of the chisel holder 27 is at an angle ⁇ or ⁇ to the longitudinal alignment of the transition section 29.2 or 29.5 and thus also to the central longitudinal axis MLL of the prism formed by the first removal surfaces 29.1 or the second removal surfaces 29.4.
  • the angle ⁇ can be between 40° and 60° or ⁇ can be in the range between 70° and 90°.
  • figure 5 also shows that with a projection of the removal surfaces 29.1 and 29.4 in a plane transverse to the feed direction (projection corresponding to figure 5 ) the removal surfaces 29.1 and 29.4 are angled to one another at an angle ⁇ in the range between 40° and 60°, or that the opening angle between the transition sections 29.2 and 29.5 in the longitudinal alignment according to figure 5 is between 120° and 140°. Accordingly, the angle ⁇ ′ between the central longitudinal axes MLL of the two prisms (pairs of removal surfaces) formed by the removal surfaces 29.1 and 29.4 is in the range between 120° and 140°.
  • the first removal surfaces are present 29.1 at an angle ⁇ and the second removal surfaces 29.4 at an angle ⁇ to the central longitudinal axis M of the plug-in attachment 30.
  • the angles ⁇ and ⁇ can be in the range between 100° and 130°, preferably in the range between 110° and 120°.
  • figure 13 shows that the first removal surfaces 29.1 enclose an angle ⁇ 1 .
  • This angle ⁇ 1 should preferably be in the range between 100° and 120°.
  • the bisector of this angle ⁇ 1 lies in a plane and figure 13 illustrates that the plug-in approach 30 is arranged symmetrically to this plane.
  • the rear second removal surfaces 29.4 are set at an angle ⁇ 2 to one another, like this figure 14 indicates.
  • the angle ⁇ 2 can deviate from the angle ⁇ 1 and in the present exemplary embodiment is between 120° and 140° and the plug-in attachment 30 is also arranged and equipped symmetrically to the bisecting plane of this angle ⁇ 2 .
  • figure 15 shows that a first removal surface 29.1 of the first pair of removal surfaces and a second removal surface 29.4 of the second pair of removal surfaces are set at an angle ⁇ to one another and form a support area.

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)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Road Repair (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)

Claims (15)

  1. Porte-pic pour une machine de travail du sol, en particulier une fraiseuse routière, qui présente un logement de burin (27) dans la zone d'un côté de travail et qui porte directement ou indirectement un embout à enficher (30) sur un côté d'embout d'un corps de support (21), le corps de support (21) présentant deux surfaces de butée (première ou deuxième surface de butée (29.1, 29.4)) formant une paire de surfaces de butée, qui forment un angle (ε1, ε2) l'une par rapport à l'autre,
    caractérisé
    en ce que le corps de support (21) présente au moins une autre surface de butée (29.1, 29.4) qui forme un angle (γ', ω) avec les deux surfaces de butée (29.1, 29.4) de la paire de surfaces de butée, les surfaces de butée (29.1, 29.4) pouvant être utilisées pour le transfert de charge dans une partie de base (10), en ce que les deux surfaces de butée (29.1, 29. 4) de la paire de surfaces de butée sont disposées dans la direction d'avance (V) du porte-pic (20) au moins dans certaines zones devant l'embout à enficher (30) et l'autre surface de butée (29.1, 29.4) est disposée au moins dans certaines zones derrière l'embout à enficher (30) dans la direction opposée à la direction d'avance (V), ou
    en ce que les deux surfaces de butée (29.1, 29.4) de la paire de surfaces de butée sont disposées au moins par zones derrière l'embout à enficher (30) à l'encontre de la direction d'avance (V) et l'autre surface de butée (29.1, 29.4) est disposée au moins par zones devant l'embout à enficher (30) dans la direction d'avance (V).
  2. Porte-outil selon la revendication 1,
    caractérisé en ce
    que les deux surfaces de butée (29.1, 29.4) de la paire de surfaces de butée et la au moins une autre surface de butée (29.1, 29.4) divergent du côté de l'embout à enficher en direction du côté de travail.
  3. Porte-outil selon l'une des revendications 1 ou 2,
    caractérisé en ce
    que l'au moins une autre surface de butée (29.1, 29.4) est réalisée de manière sensiblement symétrique par rapport au plan transversal médian (MQ) s'étendant dans la direction de l'axe longitudinal médian (M) de l'embout mâle (30).
  4. Porte-outil selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce
    que l'au moins une autre surface de butée (première surface de butée (29.1)) forme, au moins par zones, la face inférieure d'une jupe frontale (22).
  5. Porte-outil selon l'une des revendications 1 à 3,
    caractérisé en ce
    que la au moins une autre surface de butée (deuxième surface de butée 29.4) forme au moins par endroits la face inférieure d'un appendice d'appui arrière.
  6. Porte-outil selon l'une des revendications 1 à 5,
    caractérisé en ce
    que les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée et l'autre surface de butée (29.1 et 29.4) forment un guidage d'appui à trois surfaces.
  7. Porte-outil selon l'une des revendications 1 à 6,
    caractérisé en ce
    que les normales aux surfaces de butée (29.1, 29.4) de la paire de surfaces de butée sont respectivement orientées vers leur côté de porte-pic vu dans le sens d'avance (v) de l'outil.
  8. Porte-outil selon l'une des revendications 1 à 7,
    caractérisé en ce
    que les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée forment un angle obtus (ε1, ε2), notamment compris entre 100° et 140°.
  9. Porte-outil selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce
    que les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée et/ou l'au moins une autre surface de butée (29.1, 29.4) sont reliées entre elles au moins par endroits dans la zone du côté de l'embout par une section de transition (29.2, 29.5).
  10. Porte-outil selon l'une des revendications 1 à 9,
    caractérisé en ce
    que l'embout à enficher (30) est raccordé au côté de l'embout au moins partiellement dans la zone des surfaces de butée (29.1, 29.4) de la paire de surfaces de butée et/ou de la au moins une autre surface de butée (29.1, 29.4).
  11. Porte-outil selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce
    que l'axe longitudinal de l'embout à enficher (30) et l'axe longitudinal médian (MLL) du prisme formé par les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée forment un angle (β, µ) compris entre 100° et 130°.
  12. Porte-outil selon l'une quelconque des revendications 1 à 11,
    caractérisé en ce
    que l'axe longitudinal central (24.1) du logement de pic (27) est disposé au moins par zones entre les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée.
  13. Porte-outil selon l'une des revendications 1 à 12,
    caractérisé en ce
    que le logement de pic (27) se transforme en un canal de rinçage (28), et que le canal de rinçage (28) sort au moins par endroits dans la zone située entre les surfaces de butée (29.4) de la paire de surfaces de butée.
  14. Porte-outil selon l'une des revendications 1 à 13,
    caractérisé en ce
    que respectivement une première surface de butée (29.1) de la paire de surfaces de butée et l'au moins une autre surface de butée (29.4) sont inclinées l'une par rapport à l'autre selon un angle (ω), de préférence dans une plage comprise entre 120° et 160°, et forment une zone d'appui.
  15. Porte-outil selon l'une quelconque des revendications 1 à 14,
    caractérisé en ce
    qu'un plan recevant la bissectrice est disposé entre les surfaces de butée (29.1, 29.4) de la paire de surfaces de butée, et en ce que l'axe longitudinal de l'embout à enficher (30) est disposé symétriquement par rapport à ce plan et/ou
    que l'axe longitudinal médian de l'embout à enficher (30) se situe dans la plage angulaire de -10° à +10° par rapport à la bissectrice qui est formée entre la bissectrice des surfaces à enficher (29.1, 29.4) de la paire de surfaces d'ablation et l'autre surface à enficher (29.1, 29.4).
EP12733049.6A 2011-07-04 2012-06-28 Porte-outil pour une machine de travail du sol Active EP2729666B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011051525A DE102011051525A1 (de) 2011-07-04 2011-07-04 Meißelhalter für eine Bodenbearbeitungsmaschine
PCT/EP2012/062556 WO2013004583A2 (fr) 2011-07-04 2012-06-28 Porte-outil pour une machine de travail du sol

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Publication Number Publication Date
EP2729666A2 EP2729666A2 (fr) 2014-05-14
EP2729666B1 true EP2729666B1 (fr) 2022-11-09

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US (3) US9260965B2 (fr)
EP (1) EP2729666B1 (fr)
JP (1) JP6016812B2 (fr)
KR (1) KR20140015597A (fr)
CN (1) CN102864728B (fr)
BR (1) BR112013013170B1 (fr)
DE (1) DE102011051525A1 (fr)
PL (1) PL2729666T3 (fr)
RU (1) RU2584429C2 (fr)
TW (1) TW201307636A (fr)
WO (1) WO2013004583A2 (fr)

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RU2013132701A (ru) 2015-08-10
CN102864728B (zh) 2016-05-11
US9739145B2 (en) 2017-08-22
CN102864728A (zh) 2013-01-09
EP2729666A2 (fr) 2014-05-14
WO2013004583A2 (fr) 2013-01-10
BR112013013170A2 (pt) 2016-09-06
JP2014507582A (ja) 2014-03-27
US20160208606A1 (en) 2016-07-21
JP6016812B2 (ja) 2016-10-26
RU2584429C2 (ru) 2016-05-20
KR20140015597A (ko) 2014-02-06
WO2013004583A3 (fr) 2013-10-17
PL2729666T3 (pl) 2023-03-13
US20180016898A1 (en) 2018-01-18
US10208593B2 (en) 2019-02-19
US9260965B2 (en) 2016-02-16
AU2012280450A1 (en) 2013-05-23
BR112013013170B1 (pt) 2020-05-26
TW201307636A (zh) 2013-02-16
DE102011051525A1 (de) 2013-01-10
TWI561702B (fr) 2016-12-11
US20140117741A1 (en) 2014-05-01

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