EP3434826B1 - Racle pour une lame racleuse d'une fraiseuse routière - Google Patents

Racle pour une lame racleuse d'une fraiseuse routière Download PDF

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Publication number
EP3434826B1
EP3434826B1 EP18183052.2A EP18183052A EP3434826B1 EP 3434826 B1 EP3434826 B1 EP 3434826B1 EP 18183052 A EP18183052 A EP 18183052A EP 3434826 B1 EP3434826 B1 EP 3434826B1
Authority
EP
European Patent Office
Prior art keywords
cutting
carrier
wiper strip
strip according
cutting elements
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
EP18183052.2A
Other languages
German (de)
English (en)
Other versions
EP3434826A1 (fr
Inventor
Thomas Lehnert
Andreas Salz
Cyrus Barimani
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
Betek GmbH and Co KG
Original Assignee
Wirtgen GmbH
Betek GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wirtgen GmbH, Betek GmbH and Co KG filed Critical Wirtgen GmbH
Publication of EP3434826A1 publication Critical patent/EP3434826A1/fr
Application granted granted Critical
Publication of EP3434826B1 publication Critical patent/EP3434826B1/fr
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Classifications

    • 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
    • E01C23/12—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 taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/121—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 taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with non-powered tools, e.g. rippers
    • 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
    • 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
    • E01C23/12—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 taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/122—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 taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
    • E01C23/127—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 taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus rotary, e.g. rotary hammers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/815—Blades; Levelling or scarifying tools
    • E02F3/8152—Attachments therefor, e.g. wear resisting parts, cutting edges

Definitions

  • the invention relates to a squeegee for the scraper blade of a road milling machine.
  • Road milling machines are used in road construction. They serve to remove existing road surfaces.
  • the road milling machine has a milling drum, which is housed in a milling drum box.
  • the surface of the milling drum is equipped with a large number of milling chisels.
  • the milling cutters are usually mounted in the upper parts of the tool holder changing systems.
  • the tool holder changing systems have a lower part that is attached to the surface of the milling drum.
  • the upper part is interchangeably connected to the lower part.
  • the milling cutter is fastened in a receptacle of the upper part.
  • the milling drum can be rotated in the milling drum box. When it is placed on the road surface, the milling cutters mill off the road surface. The milled material must be removed from the milling drum box.
  • a take-off belt is connected to the milling drum box. The milled material is fed to this discharge belt by the milling drum.
  • the milling drum box is usually shielded on the side.
  • side walls are usually used, which run in the direction of travel of the milling drum and are height-adjustable.
  • the milling drum box is closed at the front with a front wall. In the area of the back of the milling drum box, the scraper plate mentioned above is arranged.
  • the scraper blade is usually designed in the form of a wall element and has an underside facing the road surface. One or more scraper strips are arranged in the region of this underside.
  • the scraper blade is height adjustable via a drive. In this way, the assignment to the road surface can be set exactly.
  • the milling cutters mill off the road surface during the milling operation. This usually creates a Milling pattern in which grooves parallel to each other and running in the direction of travel are worked into the road surface.
  • the scraper blade with the scraper bars is placed on the surface of the road, with the scraper bars resting on the milled structure.
  • the scraper blade is moved along with the road milling machine.
  • the scraper blade with its scraper strips glides over the milled structure.
  • Such scraper blades are from the DE 20 2010 008 045 U1 and the DE 10 2014 007 907 A1 known.
  • the scraper blade has the task of preventing milled material from being ejected from the back of the milling drum box. Furthermore, any unevenness in the milled structure should be leveled with the scraper blade, so that the milling plane is as uniform as possible. For example, it is conceivable that a milling chisel of the milling drum is damaged, in particular breaks, during the milling operation. This creates a defect in the area of the milling drum. No pavement is then removed at this defect, so that the desired milled groove does not form in the pavement, but rather an elevation remains in the milling structure. The scraper blade is now able to break this elevation in order to rework the desired flat milling structure.
  • Squeegees are known in the prior art.
  • a cuboid carrier is usually used for this purpose.
  • the carrier has a front work surface and a rear mounting surface.
  • Tungsten carbide plates are attached in the area of the lower edge of the work surface facing the road surface.
  • the carbide plates are lined up and form a lower cutting edge. With the cutting edge, the squeegee can be placed on the road surface.
  • a squeegee which has a carrier with a front and a rear mounting surface.
  • the carrier has a cutting element receptacle on or in which cutting elements are held in a row along a longitudinal axis extending in the width direction of the carrier.
  • the cutting elements have a cutting edge that merges directly or indirectly into a rake face.
  • the cutting edge is at an angle, at least in some areas not parallel to the longitudinal axis.
  • the squeegee can be securely supported on the squeegee with its rear mounting surface.
  • the scraper bar is then moved together with the scraper blade in the feed direction during the milling operation, the feed direction being transverse to the longitudinal axis.
  • the cutting edges are then also positioned transversely to the feed direction. If there is an unevenness in the milling structure, the cutting edge hits it obliquely, which leads to a better cutting result.
  • a force component is now transferred from the cutting edge to the unevenness, which is at an angle to the feed direction in accordance with the angle of attack of the cutting edge. This not only creates a force component acting on the unevenness in the feed direction, but also transversely to the feed direction.
  • the cutting elements preferably consist of a hard material, for example of hard metal or a ceramic material.
  • they can be integrally connected to the carrier; it is particularly preferred that cutting elements made of hard metal are used which are soldered to the carrier.
  • the cutting elements have two cutting edges which are at an angle to one another and which are each set at an angle to the longitudinal axis. In this way it is possible to implement a zigzag-shaped cutting edge on the squeegee with simple cutting elements.
  • the cutting element has two legs that are at an angle to one another and that each of the legs has a cutting edge. The legs that are positioned relative to one another can be supported on their rear sides on support surfaces that are at an angle to one another in accordance with the angle of attack of the legs. In this way, the cutting elements can be easily and precisely positioned on the carrier. This has advantages in the automated manufacture of the squeegee.
  • the cutting elements have a secondary cutting edge that extends transversely to the cutting element or the cutting element. In this way, in particular bumps which have a comparatively greater extension transverse to the direction of advance of the road milling machine can be effectively divided off from the road surface.
  • a variant of the invention can be such that at least some of the cutting elements have abutting surfaces, the cutting elements being lined up in the region of their abutting surfaces, and that the cutting edge of the cutting elements runs in the region between the abutting surfaces and is preferably guided at the cutting ends to the abutting surfaces .
  • the cutting elements can be precisely aligned with one another over the abutting surfaces, taking into account production-related tolerances or with the interposition of a cohesive connection layer, for example a solder connection. In this way, an exact alignment of the cutting elements with respect to the carrier is easily possible. If the cutting edges are guided up to the abutting surfaces, then an uninterrupted or almost uninterrupted continuous cutting edge can be designed on the squeegee in the longitudinal direction.
  • a further variant of the invention can be characterized in that at least some of the cutting elements have two rake faces, which directly or indirectly connect to one cutting edge each, and that the rake faces are at an angle to each other in a roof shape. This measure also achieves an improved cutting effect for the squeegee.
  • the removed material can be discharged on both sides via the two clamping surfaces.
  • the cutting elements can be lined up in the cutting element receptacle in such a way that the cutting edges and / or the rake faces form a wavy, zigzag-shaped or sawtooth-shaped structure. Wavy and zigzag-shaped structures lead to a cutting edge that is optimized for wear. A sawtooth-shaped structure forms a break-resistant cutting edge.
  • a further improvement in the wear behavior for the squeegee can be achieved in that the support on the bottom side, following the cutting elements (30), has a connection surface which is set back from the cutting edges to form a free surface, and in the region of the connection surface one or more Skids consisting of a hard material are arranged.
  • the support on the bottom side, following the cutting elements (30) has a connection surface which is set back from the cutting edges to form a free surface, and in the region of the connection surface one or more Skids consisting of a hard material are arranged.
  • one or more receptacles are / are incorporated into the connection surface in which the sliding skid is / are at least partially accommodated.
  • the receptacles can also be designed such that the skids are opposite to the feed direction are positively supported so that a strength-optimized design can be achieved.
  • a conceivable variant of the invention is such that the cutting element receptacle of the carrier has a plurality of elevations which engage in depressions in the cutting elements or that the cutting element receptacle of the carrier has a plurality of depressions which engage in elevations of the cutting elements.
  • the cutting element can be positioned and aligned on the elevation or depression for assembly purposes.
  • the cutting element receptacle is composed of partial receptacles, at least in regions, and that each partial receptacle has at least one elevation or depression.
  • a cutting element can be inserted precisely in each partial holder.
  • a positive connection between the cutting element and the carrier can be effected transversely to the longitudinal axis or transversely to the feed direction of the road milling machine via the elevations or depressions, which leads to improved support.
  • the cutting element receptacle has a flat contact surface that runs in the direction of the longitudinal axis, and that the cutting elements are supported on this contact surface by means of a connecting material, in particular a solder material.
  • the carrier has an extension which protrudes rearward beyond the rear mounting surface, a support surface of the extension and the mounting surface enclosing an angle. With its support surface and the rear mounting surface, the squeegee can be positioned and aligned on corresponding mating surfaces of the scraper blade.
  • the rear approach also offers the possibility of incorporating wear protection elements. For example, the skids mentioned above can be used here and find enough space. It is also conceivable that other wear protection elements made of hard material are integrated or inserted into the underside of the rear attachment facing the road surface.
  • FIG. 1 shows a road milling machine 50 in side view.
  • the road milling machine 50 has a chassis 51 which is supported by four undercarriages 55. Two front trolleys 55 and two rear trolleys 55 are provided. Each undercarriage 55 is coupled to the chassis 51 via a lifting column 54. The height of the chassis 51 can be adjusted relative to the undercarriages 55 via the lifting columns 54. In the present case, the trolleys 55 are designed as chain drives.
  • the chassis 51 also carries a control station 52 for a machine operator.
  • the controls for the road milling machine 50 are arranged here so that the machine operator can operate and drive the road milling machine 50.
  • a milling unit 60 is arranged between the trolleys 55.
  • a receiving belt 56 is assigned to the milling unit 60.
  • the material milled off by the milling unit 60 can be transported away via the receiving belt. Following the receiving belt 56, the milled material falls onto a conveyor 53.
  • the conveyor 53 can comprise a rotating conveyor belt. The milled material is loaded onto a truck by means of the conveyor 53.
  • the milling unit 60 has a milling drum 61.
  • the milling drum 61 has a milling drum tube.
  • Chisel holders or chisel holder changing systems 62 are attached to the outer surface of the milling drum tube.
  • a lower part of the chisel holder changing system is attached to the surface of the milling drum tube, for example screwed to it.
  • An upper part, for example a chisel holder can be exchangeably connected to the lower part.
  • the chisel holder has a chisel holder.
  • a milling chisel 63 can be exchangeably fastened in the chisel holder.
  • the above-described milling drum 61 can be rotatably received in a milling drum box 64.
  • the milling drum 61 is driven by a drive unit of the road milling machine 50.
  • the milling drum box 64 preferably encloses the milling drum 61 on all sides, with the exception of its underside. Accordingly, the milling unit 60 has two side walls 65, which are arranged in the region of the longitudinal ends of the milling drum 61. These side walls 65 run in the direction of travel of the road milling machine 60, which corresponds to the feed direction indicated in the drawings.
  • the side walls 65 can be adjusted separately in terms of their height, that is to say vertically, via an adjusting mechanism 67.
  • the side walls have 65 runners 66. With these runners 66, the side walls 65 are placed on the surface of the roadway during milling operation.
  • a front wall of the milling drum box 64 is arranged, which has a passage.
  • a spatial connection between the receiving belt 56 and the milling drum 61 is established via the passage.
  • the milling drum box 64 is closed with a top wall.
  • a rear wall is arranged on the back.
  • a scraper plate 68 is arranged at the lower end of the rear wall.
  • the scraper blade 68 has a lower horizontal edge, which in Figure 3 runs in the depth direction of the image plane.
  • the milling drum 61 is placed on the surface of the road to be machined. This takes place via the adjustment of the lifting columns 54. The milling drum 61 then stands with its underside on the road surface. If the milling drum 61 is now set in rotation, it removes the surface of the road with the milling cutters 63.
  • the bit holder changing systems 62 are positioned on the surface of the milling drum 61 in the form of broaching and loading helices. The milled material is transported via these broaching and loading coils to a predetermined location of the milling drum 61, for example to the center of the milling drum. Ejectors of the milling drum 61 are arranged here.
  • scraper blade 68 does not sit directly with its lower edge 68.1 on the road surface. Rather, scraper strips 20 are mounted here. of which in the Figures 4 to 14 different variants are shown. These figures will be discussed below.
  • the scraper strips 20 have a carrier 10. This can be formed, for example, from a steel material.
  • the carrier 10 can be designed, for example, as a forged part, as is the case with Figures 4 and 5 demonstrate. It is also conceivable that the carrier 10 is designed as a milled part.
  • Cutting elements 30 of the scraper strip 20 are fastened to the carrier 10.
  • the cutting elements 30 consist of a hard material. It is conceivable to use hard metal or ceramic as the hard material.
  • the cutting elements 30 are preferably integrally connected to the carrier 10, for example it is conceivable that the cutting elements 30 are soldered to the carrier 10. Furthermore, it is advantageous if the cutting elements 30 are also connected to the carrier 10 in a form-fitting manner, in addition or as an alternative to a selected type of connection, for example a material connection.
  • Figure 4 shows an example of a carrier 10. This has a stripping surface 11 on the front and a mounting surface 17 on the rear. The wiping surface 11 can be formed parallel to the mounting surface 17. How Figure 4 shows, one or more screw receptacles 12 can be provided in the carrier. These screw receptacles 12 penetrate both the wiping surface 11 and the mounting surface 17 and are therefore designed as through holes.
  • a cutting element receptacle 13 is arranged in the region of the lower horizontal edge of the carrier 10. The cutting element receptacle 13 is set back in relation to the stripping surface 11.
  • the carriers 10 can have a cuboid structure, wherein they have a longitudinal axis L that runs in the width direction.
  • the carrier 10 has a component height, perpendicular to the longitudinal axis L, which is significantly smaller than the component width. Furthermore, the carrier 10 has a component depth, which in turn is smaller than the component height.
  • a cutting element receptacle 13 can run in the direction of the longitudinal axis L.
  • the cutting element receptacle 13 is segmented. Accordingly, it has partial recordings 13.1.
  • the partial recordings 13.1 each have support surfaces 13.2, 13.3. These support surfaces 13.2, 13.3 are arranged at an angle to one another.
  • the support surfaces 13.2, 13.3 thus form elevations 13.5 which face the region of the wiping surface 11.
  • the support surfaces 13.2, 13.3 have transitions 13.4 turned away from the wiping surface 11 and are formed recessed.
  • the cutting element receptacle 13 also has a wall 14. This can for example be arranged perpendicular to the stripping surface 11 or at any other angle to this stripping surface 11.
  • Scraper strip 20 shown is provided on one of the longitudinal ends of the cutting element receptacle 13, a corner receptacle 15.
  • the corner receptacle forms a support section 15.1, which can be designed in the form of a support surface. Furthermore, the corner receptacle 15 has connecting surfaces 15.2.
  • the cutting element receptacle 13 continues after the corner receptacle 15 in the direction of the component height. In the depth direction, a connection surface 16 adjoins the cutting element receptacle 13 below the cutting element receptacle 13. This can run perpendicular to the wiping surface 11 or to the mounting surface 17.
  • the connection surface 16 can also extend at an angle greater than 270 ° to the stripping surface 11.
  • Cutting elements 30 can be attached to the cutting element receptacle 13.
  • the cutting elements 30 are in Figure 6 shown in more detail.
  • the cutting elements 30 have two legs 33 which are at an angle to one another.
  • the legs 33 are closed at the bottom with open areas 31.
  • an auxiliary cutting edge 36 is arranged on the front.
  • This secondary cutting edge 36 connects two rake faces 35 which are at an angle to one another.
  • the rake faces 35 form a roof-shaped geometry.
  • Cutting edges 35.1 are formed in the transition area between the free surfaces 31 and the rake surfaces 35.
  • the cutting edges 35.1 can be arranged in such a way that they are led into the connection area 32.
  • the cutting edges 32 are preferably designed such that they meet in the connection area.
  • the cutting elements 30 can be fastened to the partial receptacles 13.1 of the cutting element receptacle 13 by means of a material connection, for example solder material or adhesive material.
  • a material connection for example solder material or adhesive material.
  • the cutting elements 30 are placed with their legs 33 on the support surfaces 13.2, 13.3 of the cutting element receptacle 13.
  • the sides of the cutting elements 30 opposite the free surfaces 31 are pushed against the wall 14. An exact positioning and alignment of the cutting elements 30 is thus achieved.
  • the free area 31 preferably merges flush into the connection area 16.
  • the cutting elements 30 are lined up in the direction of the longitudinal axis L.
  • the abutting surfaces 34 of the adjacent cutting elements 30 abut one another.
  • the abutment surfaces 34 do not have to meet directly.
  • a corner cutting element 40 can be inserted into the corner receptacle 15.
  • the corner cutting element 40 is in Figure 7 shown.
  • the corner cutting element 40 has abutting surfaces 41, 42 which are at an angle to one another.
  • a connecting surface 46 is provided in the region in which the two abutting surfaces 41, 42 meet at an angle to one another.
  • the Connecting surface 46 can also consist of only one radius. Opposite the connecting surface 46, the diverter surface 45 has a cutting edge 47.
  • this cutting edge 47 is designed in the shape of an arc.
  • a free surface 43 adjoins the cutting edge 47. As in the exemplary embodiment shown, this free surface 43 can extend from the cutting edge 47 to the attachment surface 44. It is conceivable that the free area 43 also only extends over a partial area.
  • the free surface 43 can preferably be designed as a convexly curved wall, as in the exemplary embodiment shown.
  • Figure 5 shows the fully assembled scraper strip 20.
  • the cutting elements form a zigzag-shaped cutting edge in the area of the underside of the scraper strip 20.
  • a wavy cutting edge could also be realized if the cutting edges 35.1 of the cutting element 30 are not arranged at an angle to each other, but are arranged in waves. In this case, it is also advisable to assign the rake faces 35 to one another in a wave shape.
  • FIGS. 8 and 9 show a further embodiment of a squeegee 20, in which a sawtooth-shaped cutting edge is realized.
  • FIG 8 shows, in contrast to the configuration according to the Figures 4 to 7 no segmented cutting element receptacle 13 with partial receptacles 13.1 is used. Rather, there is a continuous cutting element receptacle 13 in the direction of the longitudinal axis L.
  • Cutting elements 30 are lined up in the cutting element receptacle 13. The cutting elements 30 again form a free face 31 on the bottom, which merges into a rake face 35 via a cutting edge 35.1.
  • the cutting element 30 again has a contact surface for contacting a wall 14 of the cutting element receptacle 13.
  • the cutting elements 30 form abutting surfaces 34 on opposite sides, via which they are strung together.
  • the cutting edges 35.1 of the cutting elements 30 do not run parallel to the longitudinal axis L but are set at an angle to this.
  • a rear extension 18 is provided on the carrier 10.
  • the projection 18 projects beyond the mounting surface 17 and is connected in one piece to the carrier 10.
  • the approach 18 forms a support surface 18.1.
  • the mounting surface 17 and the support surface 18.1 enclose an angle.
  • the carrier has 10 receptacles 16.1. These are recessed into the underside of the carrier 10.
  • skids 70 consisting of hard material are used. Hard metal, ceramic or another hard body can again be used as the hard material.
  • the skids 70 are preferably held integrally in the receptacles 16.1. They are arranged in such a way that they protrude a little way beyond the underside connection surface 16, like this Figure 9 shows.
  • the skids 70 therefore form wear protection for the underside of the carrier 10.
  • the use of a rear extension 18 or the described skids 70 is not limited to the present exemplary embodiment. Rather, these designs can be provided individually or in combination in all other exemplary embodiments and in particular as desired in connection with the invention.
  • the cutting elements 30 are inserted into the cutting element receptacle 13.1 in such a way that the free surface 31 is inclined with respect to the floor horizontal running parallel to the feed direction.
  • the floor horizontal and the free surface 31 enclose an acute angle. This feature can also be used in all embodiments of the invention.
  • FIG. 10 to 12 An embodiment of the invention is shown, which is analogous to the embodiment of FIG Figures 8 and 9 is designed so that reference can be made to the above statements. The only difference between the two embodiments is that with the squeegee 20 according to FIG Figures 10 to 12 no rear approach 18 is used. How Figure 11 shows how this is in relation to the above Figures 8 and 9 has been described, the bottom-side connection surface 16 inclined relative to the bottom horizontal (Angle ⁇ ). The front stripping surface 11 is slightly tilted in the installed position of the stripping strip 20 with respect to the vertical plane perpendicular to the direction of advance (angle a).
  • Figure 12 reveals that the cutting edges 35.1 of the cutting elements 30 are at an angle (.mu.) to the longitudinal axis L according to the invention.
  • Figure 12 also shows that in the installed position, the scraper strip 20 is oriented such that the direction of advance v extends transversely to the longitudinal extent L. Accordingly, the cutting edges 35.1 of the cutting elements 30 are also set at an angle ⁇ greater than 90 ° to the feed direction.
  • skids 70 are used, which are inserted into the underside of the carrier 10.
  • the stripping strips 20 described above can be mounted on the lower edge 68.1 of a stripping plate 68, as was described above.
  • Several scraper strips 20 are mounted next to one another in order to at least partially cover the lower edge 68.1. It is conceivable that always identical scraper strips 20 are mounted side by side on the scraper plate 68. It is also conceivable that wiper strips 20 with corner cutting elements 40 are mounted on the longitudinal ends of the wiper shield 68.
  • the Figures 4 to 7 show an embodiment of such an end-side scraper bar 20. With such one-sided scraper bars 20, the step that arises in the milling image and that follows the milling drum 61 is also reworked. The corner cutting elements 40 ensure a clean and exact finish.
  • a scraper blade 68 is used in which scraper strips 20 are strung together, the last two scraper strips 20 of this row having a corner cutting element 40. It is also conceivable that in these two or in the case of an end wiper strip, at least one cutting element 30 is also connected on both sides to the corner cutting element 40, as is the case, for example, with Figure 5 shows.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Repair (AREA)
  • Milling Processes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (19)

  1. Racle (20) pour une lame racleuse (68) d'une fraiseuse routière, comprenant un support (10), lequel comporte un côté avant et une surface de montage (17) arrière,
    le support (10) comportant un logement d'élément de coupe (13),
    sur ou dans le logement d'élément de coupe (13), des éléments de coupe (30) étant maintenus juxtaposés le long d'un axe longitudinal (L) s'étendant dans le sens de la largeur du support (10),
    et les éléments de coupe (30) comportant un tranchant (35.1), lequel passe directement ou indirectement dans une face de coupe (35),
    caractérisée en ce que,
    pour au moins une partie des éléments de coupe (30), le tranchant (35.1), au moins par zones, est placé non parallèle à l'axe longitudinal (L) (angle d'inclinaison (µ)).
  2. Racle selon la revendication 1,
    caractérisée en ce que,
    au moins une partie des éléments de coupe (30) comporte deux tranchants (35.1), lesquels sont inclinés l'un par rapport à l'autre et lesquels sont respectivement réglés selon un angle (µ) par rapport à l'axe longitudinal (L).
  3. Racle selon la revendication 2,
    caractérisée en ce que,
    l'élément de coupe (30) comporte deux jambes (31), lesquelles sont inclinées l'une par rapport à l'autre et que la jambe (31) respective comporte respectivement un tranchant (35.1).
  4. Racle selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que,
    au moins une partie des éléments de coupe (30) comportent un tranchant secondaire (36), lesdits tranchants s'étendent transversalement aux un ou plusieurs tranchants (35.1) de l'élément de coupe (30).
  5. Racle selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que,
    au moins une partie des éléments de coupe (30) comportent des surfaces d'aboutement (34), les éléments de coupe (30), dans la zone de leurs surfaces d'aboutement (34), étant juxtaposés,
    le tranchant (35.1) des éléments de coupe s'étend dans la zone entre les surfaces d'aboutement (34) et est de préférence guidé aux extrémités de coupe vers les surfaces d'aboutement (34).
  6. Racle selon l'une quelconque des revendications 2 à 5,
    caractérisée en ce que,
    au moins une partie des éléments de coupe (30) comportent deux faces de coupe (35), lesquelles se raccordent directement ou indirectement à un tranchant (35.1) respectif, et que les faces de coupe (35) sont disposées, en forme de toit, à un angle l'une par rapport à l'autre.
  7. Racle selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce que,
    les éléments de coupe (30) sont juxtaposés dans le logement d'élément de coupe (13) de telle sorte que les tranchants (35.1) et/ou les faces de coupe (35) forment une structure ondulée, en forme de zigzag ou en dents de scie.
  8. Racle selon l'une quelconque des revendications 1 à 7,
    caractérisée en ce que,
    les tranchants (35.1) sont réglés dans la plage angulaire comprise entre 2 ° et 28 °, de manière particulièrement préférée dans la plage angulaire comprise entre 10 ° et 20 ° par rapport à l'axe longitudinal (L).
  9. Racle selon l'une quelconque des revendications 1 à 8,
    caractérisée en ce que,
    le support (10) comporte, côté fond, à la suite des éléments de coupe (30), une surface de raccordement (16), laquelle, pour former une surface libre, est en retrait par rapport aux tranchants,
    et que, dans la zone de la surface de raccordement (16), au moins un patin (70), constitué d'une matière dure, est disposé.
  10. Racle selon la revendication 9,
    caractérisée en ce que,
    au moins un logement est incorporé dans la surface de raccordement (16), dans lequel le patin (70) est au moins partiellement logé.
  11. Racle selon l'une quelconque des revendications 1 à 10,
    caractérisée en ce que,
    le support (10) comporte un épaulement (18), lequel fait saillie vers l'arrière au-delà de la surface de montage (17) arrière, une surface de support (18.1) de l'épaulement (18) et la surface de montage (17) formant un angle.
  12. Racle selon l'une quelconque des revendications 1 à 11,
    caractérisée en ce que,
    le logement d'élément de coupe (13) du support (10) comporte une pluralité de crêtes (13.5), lesquelles viennent en prise dans des cavités des éléments de coupe (30) ou que le logement d'élément de coupe (13) du support (10) comporte une pluralité de cavités, lesquelles viennent en prise dans les crêtes des éléments de coupe (30).
  13. Racle selon la revendication 12,
    caractérisée en ce que,
    le logement d'élément de coupe (13) est composé, au moins par zones, de logements partiels (13.1),
    et que chaque logement partiel (13.1) comporte au moins une crête (13.5) ou une cavité.
  14. Racle selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le logement d'élément de coupe (13) comporte une surface d'appui plane, laquelle s'étend dans la direction de l'axe longitudinal (L) et que les éléments de coupe (30) sont supportés sur ladite surface d'appui à l'aide d'une matière de raccordement, en particulier d'une matière de brasage.
  15. Racle selon l'une quelconque des revendications 1 à 14, caractérisée en ce que le support (10) comporte une largeur, laquelle s'étend dans la direction de l'axe longitudinal (L), que le support (10) comporte une hauteur, laquelle s'étend perpendiculairement à l'axe longitudinal (L) dans la direction de la hauteur du support (10), que le support (10) comporte une profondeur, laquelle s'étend dans la direction de la profondeur et que l'extension du support (10) dans la direction de l'axe longitudinal (L) est supérieure à la hauteur et à la profondeur du support (10).
  16. Racle selon l'une quelconque des revendications 1 à 15, caractérisée en ce que le support (10) comporte des logements de vis (12) ou des logements filetés, lesquels s'étendent dans la direction de la profondeur et lesquels traversent de préférence la surface de montage (17).
  17. Racle selon l'une quelconque des revendications 1 à 16, caractérisée en ce que le support (10) comporte une surface racleuse (11), laquelle s'étend dans la direction de l'axe longitudinal (L) dans la zone de la face avant du support (10) et laquelle est alignée de préférence parallèlement à la surface de montage (17) et laquelle traverse en outre de préférence les logements de vis (12).
  18. Racle selon l'une quelconque des revendications 1 à 17, caractérisée en ce qu'au moins une partie des tranchants (35.1) des éléments de coupe (30) se trouvent dans un plan et/ou qu'au moins une partie des faces de coupe (35) des éléments de coupe (30) sont disposées parallèles les unes par rapport aux autres.
  19. Lame racleuse (68) pour une fraiseuse routière, sur la face inférieure de laquelle au moins une racle (20) selon l'une quelconque des revendications 1 à 18 est fixée.
EP18183052.2A 2017-07-25 2018-07-12 Racle pour une lame racleuse d'une fraiseuse routière Active EP3434826B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017116757.9A DE102017116757B4 (de) 2017-07-25 2017-07-25 Abstreifleiste für ein Abstreifschild einer Straßenfräsmaschine

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EP3434826A1 EP3434826A1 (fr) 2019-01-30
EP3434826B1 true EP3434826B1 (fr) 2020-04-08

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EP (1) EP3434826B1 (fr)
CN (2) CN209468666U (fr)
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Publication number Priority date Publication date Assignee Title
US11746483B2 (en) 2021-10-20 2023-09-05 Caterpillar Paving Products Inc. Rotating edge cutter for cold planers
US11926973B2 (en) 2021-11-01 2024-03-12 Caterpillar Paving Products Inc. Moldboard with a scraping tool for a milling machine

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Also Published As

Publication number Publication date
US20190055701A1 (en) 2019-02-21
CN109322233A (zh) 2019-02-12
DE102017116757B4 (de) 2020-11-12
CN109322233B (zh) 2020-11-06
DE102017116757A1 (de) 2019-01-31
CN209468666U (zh) 2019-10-08
EP3434826A1 (fr) 2019-01-30
US10563363B2 (en) 2020-02-18

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