Road paving machine

Abstract

To extend a useful life of a mounting unit for connecting interchangeable components in a road paving machine, and to simplify assembly / disassembly of the interchangeable components.SOLUTION: A road paving machine comprises: interchangeable components that come into contact with a pavement material at least during an operation of the road paving; and at least one mounting unit (26) for attaching the interchangeable component to a work assembly or to a chassis of the road paving machine. A wear protection part (27) for the mounting unit (26) is provided to the road paving machine. Here, the wear protection (27) comprises a sacrificial body (32) for installation on the mounting unit (26) and / or a protection body having a protection section which is at least partially ramp-shaped or curved and guides the paving material beyond the mounting unit (26).SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a road paver according to the preamble of claim 1. [Background technology]

[0002] Road pavers are intended to form paving layers of paving material such as asphalt and generally comprise a chassis and a work assembly, such as a material storage, screed, conveyor device, lateral distributor assembly, etc., disposed on the chassis. Road pavers have replaceable components, each of which is removably attached directly to the chassis and / or work assembly by a threaded connection or multiple threaded connections, which may wear and are subsequently replaced at the end of their useful life.

[0003] A threaded connection generally comprises a screw with a threaded head and / or a threaded nut. The threaded head and / or the threaded nut typically have a drive, for example, of a hexagonal profile or a hexagonal outer or inner profile, which can be driven with a wrench to release the threaded connection. The abrasive nature of asphalt or other paving materials, such as gravel, can cause wear of the screw head and / or the threaded nut in contact with the asphalt over time, which causes a loss of material and shape at the surface of the threaded connection. The outer contour of the threaded connection or the screw head and / or the outer contour of the threaded nut can lose its angular shape and become rounded, which can no longer be gripped by commercially available tools (e.g. socket wrenches, ring spanners, open-end wrenches, ratchets with socket attachments). This makes it very difficult to replace the components at the end of their useful life. When the mounting elements are worn / worn in this way, the components have to be laboriously separated from the work assembly or chassis using an angle grinder.

[0004] DE 10 2022 102 095 A1 describes an asphalt paver with a distributor auger for distributing asphalt in front of the screed. One or more auger segments are connected to the auger shaft by means of a number of attachment elements (bolts with bolt heads and nuts). DE 10 2022 102 095 A1 further discloses that the auger segments have a U-shaped receiving part for the attachment elements. The side walls of the receiving part extend in a straight line from the body and respectively define a recess or a U-shaped recess. DE 10 2022 102 095 A1 discloses that the bolt heads and nuts of the attachment elements are countersunk in the respective recesses. According to DE 10 2022 102 095 A1, such an assembly can prevent wear on the mounting element, since the side walls of the receiving part can provide the mounting element with abrasion protection against potentially abrasive road or pavement materials, respectively. However, the mounting element is difficult to reach with a wrench, since it is surrounded by the side walls of the receiving part. Even if it were possible to remove the mounting element with a two-part tool, for example a wrench socket and a socket wrench, such a two-part tool is more difficult to use than a single-part wrench. In addition, pavement material can accumulate in the recess and harden there, which makes the replacement of the auger segment even more difficult. Due to the side walls of the U-shaped recess extending in a straight line from the body, pavement material accumulates on the walls of the recess when the auger rotates, leading to accumulation and entrainment of asphalt in the recess. And the asphalt that accumulates in the recesses must first be removed for a removal tool to reach and remove the mounting element, which significantly increases the labor involved in replacing the auger segments. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to increase the service life of mounting units for connecting replaceable components in road paver machines and to simplify the assembly / disassembly of the replaceable components. This object is met by the features of claim 1. [Means for solving the problem]

[0006] The invention relates to a road paver for forming a paving layer made of paving material, which is conveyed from a material store of the road paver to a transverse distributor assembly of the road paver in a direction opposite to the paving direction of the road paver and distributed by the transverse distributor assembly transversely to the paving direction of the road paver substantially over the working width of the screed of the road paver, wherein the road paver comprises at least an exchangeable component which contacts the paving material during operation of the road paver and at least one mounting unit for mounting the exchangeable component to the work assembly or to the chassis of the road paver, wherein a wear protection for the mounting unit is provided on the road paver. The wear protection according to the invention comprises a sacrificial body for installation on the mounting unit and / or a protection body which is at least partially ramp-shaped or curved and has a protective section for guiding the paving material beyond the mounting unit. The mounting unit can have an outer contour, in particular an angular outer contour.

[0007] According to the invention, it is advantageously possible to completely prevent or reduce the abrasive effect between the mounting unit and the hot, abrasive paving material, thereby extending the service life of the mounting unit and protecting its outer contour, allowing the mounting unit to be removed with a single-piece tool such as a wrench, and facilitating the removal of replaceable components at the end of their service life or when renewing the road paver, thereby allowing a simple and time-saving replacement of the mounting unit.

[0008] The use of a sacrificial body as an upper part in a mounting unit is particularly cost-effective and practical, since the sacrificial body can be easily installed on at least a part of the mounting unit, in particular a sacrificial body in the form of a cap can be installed on a part of the mounting unit that can be grasped with a tool, for example a screw nut, in order to "sacrifice" it and preserve the mounting unit.

[0009] The ramp-shaped or curved protective section guides the paving material past the mounting unit and thus forms a guide that directs the paving material in a direction that reduces the abrasive effect so that the paving material is guided past the mounting unit and prevented from being worn away. The ramp-shaped or curved protective section can even accelerate the paving material guided along it, which makes it easier to guide it past the mounting unit. In addition to the guide function, the ramp-shaped or curved protective section can also act as a sacrificial body.

[0010] However, in comparison with the protective section according to the invention, the recesses formed for the mounting units with parallel arranged side walls create a stagnation effect, since the paving material can slow down on the immediately preceding upright side wall and thus accumulate thereon. The paving material slowed down and accumulated at the side wall is then easily accessible to the mounting unit. The protective effect against wear achieved by the invention is therefore only possible to a limited extent on the basis of the known accommodation of the mounting unit in the recess. Instead, the known recesses are used to fix the hexagonal components received therein against rotation.

[0011] It is also conceivable to receive the mounting unit, in particular the screw head formed thereon, for example a hexagonal component, in a recess. The recess can be dimensioned such that the screw head received therein, in particular the hexagonal component, cannot rotate in the assembled state. The recess can be an integral part of the workpiece assembly, for example a drive shaft. The recess is in particular a push-in receiving part for the mounting unit on the side opposite the installation side of the wear protection associated with the mounting unit. In addition to the positive effects of the wear protection described above, this also provides an optimal locking of the replaceable component.

[0012] The protection body, in particular the protection section, can be arranged only on the side of the mounting unit facing the conveyed paving material. This side can be called the first side of the mounting unit and forms a flank facing the material flow direction, in which the protection section is located, in order to guide the paving material conveyed towards it beyond the mounting unit. And since the protection section stands in front of the mounting unit as a protective shield, i.e. only extends on this side of the mounting unit, the second side of the mounting unit opposite the first side is advantageously freely accessible for a removal tool, for example a wrench. This allows the mounting unit to be removed with a single-part tool, for example a wrench, which greatly simplifies the replacement of the components.

[0013] The mounting unit may comprise a screw and / or a screw nut with a screw head and / or a screw and a screw nut, in particular a cap nut. The screw nut may be a hexagonal nut or a cap nut. The screw nut may be attached to the screw or to the threaded pin of the screw, respectively. The screw nut and / or the screw head may have a hexagonal profile. The screw may comprise a bolt with a thread.

[0014] In particular, the sacrificial body and / or the protective body are adapted to be attached to a threaded nut.

[0015] The mounting unit can be a work assembly, e.g., a replaceable component such as an auger blade of a lateral distribution device having a drive shaft, or other replaceable component that is removably connectable to the chassis of the road paver.

[0016] The sacrificial body can be configured such that when the sacrificial body is installed on the mounting unit, e.g. on the screw, it completely covers the screw head and / or the screw nut, in particular the cap nut, thereby ensuring protection of the mounting unit against the grinding effects of abrasive paving materials, e.g. against frictional wear and heat.

[0017] The sacrificial body can include a wear-resistant composite material or a plurality of wear-resistant composite materials, which can increase the useful life of the mounting unit.

[0018] The sacrificial body can be made of a wear-resistant composite material or a combination of wear-resistant composite materials, which can extend the useful life of the mounting unit.

[0019] The sacrificial body may include or be made of a wear-resistant cast alloy, which may increase the useful life of the mounting unit. The wear-resistant cast alloy may be selected from the following group: Ni-Hard, EN-GJN-HV600, EN-GJN-HV600(XCr18) or EN-GJN-HV600(XCr23).

[0020] The sacrificial body can be made of a plastic material with high wear and / or heat resistance. The operating temperature of the plastic material can be above 150° C. The operating temperature of the plastic material can vary from 150° C. to 300° C. The sacrificial body can be made of, for example, polyetheretherketone, polyphenylene sulfide, polyethyleneimine, polytetrafluoroethylene.

[0021] The sacrificial body may be made from steel having a hardness of at least 50-300 HBW, preferably 100-150 HBW.

[0022] The sacrificial body may preferably have the effect of preventing contact between the mounting unit and the paving material until the sacrificial body is at least partially worn / abraded.

[0023] The sacrificial body can have a receiving area having an inner contour configured to receive an outer contour of a screw head and / or a screw nut.

[0024] In one embodiment, the wear protection, in particular the sacrificial body, can be a single-piece component. Advantageously, a single-piece component can be easier to handle and / or assemble. A single-piece component can be attached to the mounting unit without the need for an additional screw connection, for example by pressing the component onto the mounting unit. Such a component can have the approximate shape of a cap nut that can be placed on a threaded nut, in particular a cap nut, of the mounting unit.

[0025] In an alternative embodiment, the wear protection, in particular the sacrificial body, can be a multi-component device. The multi-component device can be removably attached to the wear protection, for example by means of a screw connection. This allows the wear protection to be advantageously removed from the mounting unit when the useful life of the replaceable component has come to an end (when the component is to be replaced and therefore the mounting unit is to be removed), if the wear protection has not yet completely worn / worn off. The multi-component device can comprise two shells or half shells, respectively, which are spaced apart from each other or connected to each other such that they are rotatable about an axis of rotation. After the two components or two shells, respectively, of the multi-component device have been attached to the mounting unit, the two components can be connected to each other and / or to the mounting part by means of one or two screw connections. It is conceivable that the wear protection on the mounting unit is configured in the form of a clamp removably attached thereto.

[0026] The sacrificial body, whether present as a single or multiple piece, can be attached to the mounting unit by a press-fit. By means of the press-fit connection, the protective unit can be firmly installed on the mounting unit or can even completely prevent any movement of the protective unit relative to the mounting unit, thereby preventing friction between the sacrificial body and the mounting unit. The press-fit connection between the mounting unit and the sacrificial body can be removable or not. The press-fit connection between the mounting unit and the sacrificial body can be achieved by screwing or pressing the sacrificial body into the edges of the screw head and / or the screw nut. The press-fit connection between the mounting unit and the sacrificial body can be achieved by elastic and / or plastic deformation of the sacrificial body, in particular at the edges of the screw head and / or the screw nut.

[0027] Alternatively, the sacrificial body can be attachable to the mounting unit with a push-fit. The push-fit connection between the sacrificial body and the mounting unit can be removable or non-removable. The push-fit connection can be a snap / click connection. For a push-fit connection between the sacrificial body and the mounting unit, the inner contour of the sacrificial body and the outer contour of the mounting unit can have concave and convex profiles, respectively. The concave and convex profiles can engage with each other such that movement of the sacrificial body relative to the mounting unit is prevented.

[0028] Alternatively, the sacrificial body can be connected to the mounting unit with a positive substance-fit connection. The positive substance-fit connection can be a welded connection, a soldered connection or an adhesive connection.

[0029] The sacrificial body may in particular be a cast component.

[0030] The sacrificial body can be cut from sheet metal.

[0031] The protection body, in particular its protection section, can be inclined towards the mounting unit. If the protection section is inclined towards the mounting unit, the inner surface of the protection section and the outer wall of the screw nut are not parallel to each other. If the protection body or each of the protection sections is formed to be inclined towards the mounting unit, the outer wall angle between the inner surface of the protection body or each of the protection sections and the outer wall of the screw nut is less than 90 degrees. The protection section can extend over the entire height of the screw head and / or the screw nut.

[0032] The protective section may be inclined towards the mounting unit so that contact between the mounting unit and the paving material is prevented, particularly in the relative flow direction of the paving material, and at least abrasive contact leading to wear of the mounting unit is not produced.

[0033] The protective section may have substantially the shape of a half shell, the thickness / width of which may be the same along the length or thickness.

[0034] The protective section may have an inner surface and an outer surface. The distance between the inner surface of the protective section and the mounting unit may vary along the inner surface.

[0035] There may be a recess on the inside of the half-shell that receives the entire screw head and / or the entire screw nut.

[0036] The protective section may be configured substantially in the form of a shield.

[0037] The protective section can have an upper end and a lower end. A first distance between the upper end of the protective section and the mounting unit can be less than a second distance between the lower end of the protective section and the mounting unit.

[0038] The protective section may extend radially from a lower end of the protective section to an upper end of the protective section.

[0039] A lower end of the protective section may be connected to an outer surface of the work assembly.

[0040] In one embodiment, the protection can be configured as an extension of the component, which avoids additional work when installing the protection on the road paver or on the work assembly of the road paver.

[0041] In an alternative embodiment, the protection body can be mounted separately from the component, i.e. as a separate component, on the road paver, preferably on the work assembly, in particular the rotating work assembly, or on the chassis of the road paver, where it is advantageous that the protection body can be installed / removed or replaced separately from the component.

[0042] The upper end of the protection body, in particular the protective section, can extend to the upper end of the mounting unit, in particular the screw head or the screw nut.The upper end of the protection body, in particular the protective section, can extend beyond the mounting unit, in particular the screw head or the screw nut.

[0043] The protective body can be made from steel having a hardness of at least 50-300 HBW, preferably 100-150 HBW.

[0044] The guard can include a wear-resistant composite material or a plurality of wear-resistant composite materials, which can extend the useful life of the mounting unit.

[0045] The guard can be made of one or more wear-resistant composite materials, which can extend the service life of the mounting unit.

[0046] The protective body can include or be made of a wear-resistant cast alloy, which can increase the service life of the mounting unit. The wear-resistant cast alloy can be selected from the following group: Ni-Hard, EN-GJN-HV600, EN-GJN-HV600(XCr18) or EN-GJN-HV600(XCr23).

[0047] The paving material can be transported along a paving material transport line over a number of mounting units, for example in a transport direction from a material storehouse through a material tunnel in a road paver tractor to the screed. Each sacrificial body can be installed on all or part of the mounting units. Each protective body can be arranged adjacent to all or part of the mounting units.

[0048] It is also possible for a respective guard to be provided on two adjacent mounting units or on each of them.

[0049] The lateral distributor assembly may comprise a shaft. The lateral distributor assembly may comprise a distributor auger removably coupled to the shaft by a mounting unit. The distributor auger may comprise a body mounted on the shaft. The distributor auger may comprise a helical auger blade extending from the body and extending around the shaft. The distributor auger, at least some segments thereof that contact the paving material, may be present as a replaceable component of the road paver, and in particular a replaceable component of the lateral distributor assembly of the road paver.

[0050] The mounting unit may extend perpendicular to the axis of rotation of the shaft.

[0051] The guard may extend along a curvature direction opposite to the rotation direction of the auger blade, so that the guard extends in the relative flow direction of the paving material conveyed by the rotation of the auger blade, thereby reducing the abrasive force acting on the guard caused by the conveyed paving material and protecting the guard itself from wear.

[0052] The protection body can be constructed in one piece with the distributor auger, in particular the body, in particular as a cast component, which avoids the effort required for the additional assembly of the protection body in the lateral distributor assembly.

[0053] Alternatively, the guard can be constructed as a separate component, separate from the distributor auger, so that the guard can be replaced independently of the distributor auger, which can then be manufactured in a more cost-effective manner.

[0054] The guard can surround at least a portion of the shaft, in other words it can extend radially around a portion of the shaft or it can extend around a portion of the shaft, so that the guard provides wear protection not only for the mounting unit but also for the shaft.

[0055] The guard may be attached to the shaft, preferably with a base of the guard extending along the circumference of the shaft, and preferably with the guard section disposed at an angle to the base.

[0056] The material storage, the conveyor device of the road paver for conveying the paving material from the material storage to the lateral distributor assembly, the lateral distributor assembly or the screed may each be a work assembly of the road paver. The replaceable component may be a screed widening section for attachment to the screed base of the screed. The replaceable component may be a press scraper for attachment to the screed base of the screed. The replaceable component may be a channel plate for attachment to the chassis. As mentioned above, the replaceable component may in particular be a distributor auger of the lateral distributor assembly.

[0057] The wear protection according to the invention can essentially be used for removable mounting of components and for mounting to mounting units of a road paver which may come into contact with these during the road paver in relation to the material movement effected here.

[0058] The present invention will be described in more detail by using embodiments and according to the following figures. [Brief description of the drawings]

[0059] [Figure 1] FIG. 1 shows a side view of a road paver for forming a paving layer. [Diagram 2] FIG. 2 shows a perspective view of a road paver with a screed. [Diagram 3] FIG. 3 shows a top view of a screed with laterally recessed extension members. [Figure 4] FIG. 4 shows the screed of FIG. 3 with laterally extending extension members. [Diagram 5] FIG. 5 shows a screed having extended extension members as well as widening sections attached to it at the sides to achieve the desired working width. [Figure 6] FIG. 6 shows a perspective view of a lateral distributor assembly of a road paver. [Figure 7] FIG. 7 shows a schematic diagram of an embodiment of a mounting unit. [Figure 8] FIG. 8 shows a perspective view (partial view) of a lateral distributor assembly having a protective unit in the form of a sacrificial body for the mounting unit. [Figure 9] FIG. 9 shows a schematic diagram of a single-piece embodiment of the sacrificial body. [Figure 10] FIG. 10 shows a schematic diagram of a multi-piece embodiment of the sacrificial body. [Figure 11] FIG. 11 shows a perspective view (partial view) of a lateral distributor assembly having wear protection in the form of a guard for the mounting unit. [Figure 12]FIG. 12 shows a perspective view (partial view) of a lateral distributor assembly having an integrally formed protector. [Figure 13] FIG. 13 shows a schematic (partial view) of a lateral distributor assembly having an integrally formed protector. [Figure 14] FIG. 14 shows a perspective view (partial view) of a lateral distributor assembly having a separately formed protector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0060] FIG. 1 shows a road paver 1 for forming a paving layer 2 on a substrate 3. The road paver 1 comprises a material store 4 in front of the paving direction R, in which the paving material 6 stored is transported by a longitudinal conveyor device 5 from the material store 4 to a screed 7 of the road paver 1 in the direction opposite to the paving direction R of the road paver 1. The longitudinal conveyor device 5 is arranged in a chassis 8 of the road paver 1 and comprises a scraper belt 9 (see FIG. 4). The scraper belt 9 comprises a scraper belt portion 9a on the left side and a scraper belt portion 9b on the right side. The paving material 6 is transported from the scraper belt 9 of the longitudinal conveyor device 5 to a transverse distributor assembly 10 arranged in front of the screed 7. The transverse distributor assembly 10 is configured to distribute the paving material 6 in front of the screed 7 transversely to the paving direction R.

[0061] Figure 2 shows the road paver 1 in a perspective view. The screed 7 comprises a screed base 11 and a laterally extendable extension member 12 for adjusting the desired working width B of the paving layer 2 to be formed. By widening the screed 7 in this way, a longer working width B for the newly formed paving layer 2 can be achieved.

[0062] Figure 3 shows a schematic diagram of the screed 7 of the road paver 1. The paving material 6 deposited by the scraper belt 9 in front of the screed base 11 of the screed 7 is distributed by a lateral distributor assembly 10 along the leading edge 13 of the screed base 11, as indicated by the arrow P. The rear wall 14 of the chassis 8 of the road paver 1 together with the leading edge 13 of the screed base 11 forms a lateral distributor channel 15 for the lateral distributor assembly 10. This lateral distributor channel 15 can be further expanded laterally as the screed 7 widens. This is shown in Figure 4.

[0063] Figure 4 shows in a schematic top view the screed 7 with the extension member 12 extended. By widening the screed 7 in this way, a longer working width B for the newly formed paving layer 2 can be achieved. Figure 4 shows that the lateral distributor channel 15 is extended laterally beyond the screed base 11. The paving material 6 deposited by the scraper belts 9 can be transported along the widened lateral distributor channel 15 to the outside of the extension member 12. The lateral distributor assembly 10 arranged in the lateral distributor channel 15 in Figure 4 is extended in the same way.

[0064] The lateral distributor channel 15 provided in front of the screed 7 is formed in its outer region transversely to the paving direction R by a channel plate 16 supported on the chassis 8 of the road paver 1 and by a pre-scraper 17 mounted laterally on the screed base body 11. Depending on the set working width B, the channel plate 16 and the pre-scraper 17 can be extended further laterally in order to extend the lateral distributor channel 15. The same applies to the lateral distributor assembly 10.

[0065] Figure 5 shows a screed 7 with an extended extension member 12 and a widening section 18 attached transversely to the extension member 12 in order to achieve a very long working width B of the paving layer 2. Figure 5 shows the screed base 11, the extension member 12 and the widening section 18 attached transversely to the paving direction R along which the lateral distributor channel 15 is formed. Depending on the working width B, further channel plates 16 as well as press scrapers 17 are installed to further extend the lateral distributor channel 15.

[0066] FIG. 6 shows a perspective view of an embodiment of a lateral distributor assembly 10. This lateral distributor assembly 10 is mounted on the rear edge of the chassis 8 of the road paver 1. The lateral distributor assembly 10 comprises a distributor auger 19, or a right distributor auger 19a as well as a left distributor auger 19b (in the paving direction of the road paver 1). Both distributor augers 19a, 19b are mounted centrally on an auger suspension 20. An auger drive (not shown) for driving both distributor augers 19a, 19b is arranged in a housing formed by the auger suspension 20. The lateral distributor assembly 10 comprises a shaft 21. This can be two separate shafts 21 (right shaft 21a, left shaft 21b) or a common shaft 21 for both distributor augers 19a, 19b. The right distributor auger 19a is removably coupled to shaft 21a, and the left distributor auger 19b is removably coupled to shaft 21b.

[0067] The outer end of each shaft 21a, 21b, i.e. the end opposite the auger suspension 20, is mounted in an auger bearing 22a, 22b. Each auger bearing 22a, 22b is mounted at the lower end of an auger bearing bracket 23a, 23b. These auger bearing brackets 23 comprise substantially vertically aligned tubes 24a, 24b which are attached to the chassis 8 of the road paver 1 by an attachment plate 25.

[0068] The paving material 6 can include a cohesive mixture such as asphalt and / or a non-binding mixture such as gravel. An asphalt mixture consists of an aggregate mixture with a very high percentage of crushed stone and preferably polymer-modified bitumen as binder. Such paving material 6 with hard particles rubs against the mounting unit 26 of the road paver 1 that comes into contact with the paving material (see below: FIG. 7 left: screw-nut connection, FIG. 7 center: screw connection, FIG. 7 right: bolt-nut connection), causing wear on the mounting unit 26, which cannot be easily removed with a tool such as a wrench.

[0069] The present invention provides a wear protection 27 for the mounting unit 26 which will be described in more detail with reference to Figures 8-15.

[0070] FIG. 7 shows an embodiment of a mounting unit 26 for use in the road paver 1 .

[0071] The mounting unit 26 connects an exchangeable component 30 of the road paver 1 to the chassis 8 or to a work assembly 31 of the road paver 1. The work assembly 31 can be, for example, the material store 4, the longitudinal conveyor device 5, the screed 7 or the lateral distributor assembly 10. The exchangeable component 30, in particular the one against which the paving material 6 flowing from the material store 4 to the lateral distributor assembly 10 is scraped, can be, for example, the widening section 18, the channel plate 16, the press scraper 17 and / or the distributor augers 19, 19a, 19b.

[0072] The design principles of the embodiment of the wear protection 27 for the mounting unit 26 will be explained by way of example using the wear protection 27 employed in the lateral distributor assembly 10. Such a wear protection 27 can also be employed in other mounting units 26 of the road paver 1, in particular in the mounting units 26 of the road paver 1 that come into contact with the paving material 6.

[0073] FIG. 8 shows a perspective view of a part of the lateral distributor assembly 10. As mentioned above, the lateral distributor assembly 10 comprises a shaft 21 (right shaft 21a or left shaft 21b) and a distributor auger 19 removably connected to the shaft 21 by two mounting units 26. The distributor auger 19 comprises a body 33 mounted on the shaft 21 and an auger blade 34 extending from the body 33 and extending around the shaft 21. The distributor auger 19, in particular the body 33 of the distributor auger 19, is attached to the shaft 21 of the lateral distributor assembly 10 by the mounting unit 26. In FIG. 8, the mounting units 26 are present in the form of a screw-nut connection. Each mounting unit 26 comprises a screw 28 with a hexagonal screw head 28a and a screw nut 29 or cap nut 29a attached to the other end of the screw 28 (see the view on the left side of FIG. 7).

[0074] In this embodiment, the wear protection 27 is configured as a sacrificial body 32 for installation on the mounting unit 26. In FIG. 8, the sacrificial body 32 sits on and completely covers the screw nut 29 or cap nut 29a of the mounting unit 26, respectively. It is also possible that the sacrificial body 32 does not completely cover the screw nut 29 or cap nut 29a of the mounting unit 26. A further sacrificial body can be installed on the screw head 28a on the opposite side to the installation side. The sacrificial body 32 thus prevents contact and thus friction between the mounting unit 26 and the paving material 6 flowing around the mounting unit 26 (or the sacrificial body 32) in the area of ​​the screw nut 29 or cap nut 29a, respectively. The distributor auger 19 or auger blades 34, respectively, rotate in a rotation direction 35 during operation of the lateral distributor assembly 10. In response, the paving material 6 moves in a flow direction 36, which is substantially opposite to the rotation direction 35 of the distributor auger 19.

[0075] 9 shows a schematic diagram of a single-piece embodiment of the sacrificial body 32'. The sacrificial body 32' is configured as a single-piece component 32a (single-piece sacrificial body 32'). The single-piece sacrificial body 32' comprises a receiving area 37 having an inner contour 38 configured to receive the screw head 28a or the screw nut 29 or the cap nut 29a, respectively. The receiving area 37 is provided as an opening in the sacrificial body 32'. The single-piece sacrificial body 32' can be placed / attached to the hexagonal screw nut 29 or the cap nut 29a, respectively, or to the hexagonal screw head 28a with a press-fit.

[0076] FIG. 10 shows a schematic diagram of a multi-part embodiment of the sacrificial body 32″. The sacrificial body 32″ is configured as a multi-part or two-part structural device 32b (two-part sacrificial body 32″). The two-part sacrificial body 32″ comprises a receiving area 37′ having an inner contour 38′ configured to receive the screw head 28a or the screw nut 29 or the cap nut 29a, respectively. The receiving area 37′ is provided as an opening in the sacrificial body 32″. The two-part sacrificial body 32″ comprises two half shells 40a, 40b. Once the angular half shells 40a, 40b are applied to the mounting unit 26, they can be attached to each other by means of screw connections 41a, 41b.

[0077] FIG. 11 shows a perspective view (partial view) of the lateral distributor assembly 10.

[0078] In the embodiment shown in FIG. 11, the wear protection 27 is configured in the form of a protection 42 for the mounting unit 26. The protection 42 is arranged only on a first side 43 of the mounting unit 26 facing the paving material 6 to be conveyed and shields it from the side so that the mounting unit 26 does not come into contact with the paving material 6, or at least only to a very small extent. A side (second side) 44 of the mounting unit 26 located opposite the side 43 facing the paving material 6 to be conveyed does not have, for example, a further protection 42. As a result, the mounting unit 26 is freely accessible from the second side 44, for example with a wrench, and can therefore be easily removed. FIG. 11 also shows that the body 33 is provided with a recess 39 for receiving the hexagonal screw head 28a of the mounting unit 26 (i.e. on the side opposite the installation side of the cap nut 29a (see FIG. 13) and for receiving the screw head 28a with a non-rotatable push-fit).

[0079] In Fig. 11, the protector 42 is configured as an integrally formed component of the distributor auger 19 or the detachable auger blade 34, respectively, for protecting the cap nut 29a of the mounting unit 26. Fig. 11 shows that the distributor auger 19 is assembled from a number of segments A, B, i.e., a number of auger blades 34, that are placed adjacent to one another.

[0080] FIG. 12 shows a perspective view (partial view) of the lateral distributor assembly 10 with an integrally formed guard 42 for the mounting unit 26. Here, it can be seen that the guard 42 is provided with a ramp-shaped or arcuate guard section 45 inclined towards the mounting unit 26. The guard 42 or guard section 45, respectively, extends from the body 33 of the segment A of the distributor auger 19. The guard 42 or guard section 45, respectively, is integrally formed with the distributor auger 19. The guard section 42 extends over the entire height 46 of the screw nut 29 or cap nut 29a, respectively. The guard section 45 is formed in the shape of a half-shell body 47. The relative flow direction 36 of the paving material 6 and the rotation direction 35 of the distributor auger 19 are shown.

[0081] 13 shows a perspective view (partial view) of the lateral distributor assembly 10 with a guard 42 for the mounting unit 26. In this embodiment, the guard section 45 does not extend over the entire height 46 of the screw nut 29 or cap nut 29a, respectively. The guard section 45 has an inner side 48, the distance 49 between the inner side 48 of the guard section 45 and the mounting unit 26 varying along the length 50 of the inner side 48. The direction of rotation 35 of the distributor auger 19 is shown. The guard 42, and in particular the guard section 45, extends along a curvature direction K opposite to the direction of rotation 35 of the auger blades 34.

[0082] 14 shows a schematic (partial) view of the lateral distributor assembly 10 having a different embodiment of the protector 42. The protector 42 is attached to the shaft 21 as a separate component and includes a base 51 that extends along a circumferential surface 52 of the shaft 21. A guard section 45 of the protector 42 extends in an arc from the base 51 to an upper end 54 of the cap nut 29a. The guard section 45 forms an angle with the base 51.

Claims

1. A road paver (1), comprising: a material storage section (4) of the road paver (1) to a lateral distributor assembly (10) of the road paver (1) conveying a paving layer (6) made of a paving material (6) in a direction opposite to a paving advance direction (R) of the road paver (1) and distributing the paving layer (6) by the lateral distributor assembly (10) transversely to the paving advance direction (R) of the road paver (1) substantially across a working width (B) of a screed (7) of the road paver (1). 2), said road paver (1) comprising at least a replaceable component (30) which comes into contact with said paving material (6) during operation of said road paver (1) and at least one mounting unit (26) for mounting said replaceable component (30) to a work assembly (31) or a chassis (8) of said road paver (1), said road paver (1) being provided with a wear protection (27) for said mounting unit (26), The wear protection (27) comprises a sacrificial body (32) for installation on the mounting unit (26) and / or a protective body (42) having a protective section (45) that is at least partially ramp-shaped or curved and guides the paving material (6) over the mounting unit (26).

2. 2. Road construction machine according to claim 1, characterized in that the protection (42) is arranged only on the side (43) of the mounting unit (26) facing the transported paving material (6).

3. 3. Road building machine according to claim 1 or 2, characterized in that the mounting unit (26) comprises a screw (28) having a screw head (28a) and / or a screw nut (29), in particular a hexagonal nut (29b) or a cap nut (29a), mounted on the screw (28).

4. 4. A road construction machine according to claim 3, characterized in that the sacrificial body (32) is configured such that, when the sacrificial body (32) is installed on the mounting unit (26), the sacrificial body (32) completely covers the screw head (28a) and / or the screw nut (29), in particular a cap nut (29a).

5. 5. Road building machine according to claim 1, characterized in that the wear protection (27), in particular the sacrificial body (32), is a single-piece component (32a) or is a multi-piece structural device (32b), preferably comprising two half shells (40a, 40b).

6. 6. Road construction machine according to claim 1, characterized in that the sacrificial body (32) is attached to the mounting unit (26), in particular to a cap nut (29a) of the mounting unit (26), by means of a press-fit and / or a push-fit.

7. Road building machine according to any one of claims 1 to 6, characterised in that the sacrificial body (32) is connected to the mounting unit (26) with a positive substance-fit and / or a positive fit.

8. 8. Road construction machine according to any one of claims 1 to 7, characterised in that the protective section (45) is inclined towards the mounting unit (26) and preferably extends over the entire height (46) of the screw head (28a) and / or the screw nut (29), in particular the cap nut (29a).

9. A road construction machine according to any one of claims 1 to 8, characterized in that the protective section (45) is configured substantially in the form of a shield, preferably with an inner side (48), and a distance (49) between the inner side (48) of the protective section (45) and the mounting unit (26) varies along a length (50) of the inner side (48).

10. Road construction machine according to any one of claims 1 to 9, characterized in that the protection body (42) is configured as an integrally formed extension of the replaceable component (30) or is attached to the road paver (1), preferably to a work assembly (31) of the road paver (1), as a separate component, separate from the replaceable component (30).

11. 11. A road construction machine according to any one of claims 1 to 10, characterized in that the lateral distributor assembly (10) comprises a shaft (21) and at least one distributor auger (19) removably mounted on the shaft (21) by means of the mounting unit (26), the distributor auger (19) comprising a body (33) mounted on the shaft (21) and an auger blade (34) extending from the body (33) and extending around the shaft (21), the distributor auger (19) being a replaceable component (30) of the road paver (1), in particular a replaceable component (30) of the lateral distributor assembly (10) of the road paver (1).

12. 12. Road building machine according to claim 11, characterized in that the guard (42), in particular the guard section (45), extends along a curvature direction (K) opposite to the rotation direction (35) of the auger blade (34).

13. 13. A road building machine according to claim 11 or 12, characterized in that the protection body (42) is formed integrally with the distributor auger (19), in particular with the body (33), or is formed separately from the distributor auger (19) as a separate component.

14. A road construction machine according to any one of claims 11 to 13, characterized in that the protection body (42) is attached to the shaft (21) as a separate component, preferably in that a base (51) of the protection body (42) extends along a circumferential surface (52) of the shaft (21) and in that the protection section (45) forms an angle with the base (51).

15. A road construction machine according to any one of claims 1 to 14, characterized in that the replaceable component (30) is a widening part (18) of the screed (7) for the attachment of the screed (7) to the screed base (11) by means of the mounting unit (26) and / or a press scraper (17) for the attachment of the screed (7) to the screed base (11) by means of the mounting unit (26) and / or a channel plate (16) for the attachment to the chassis (8) by means of the mounting unit (26).

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