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 apply paving layers of paving material such as asphalt and generally comprise a chassis and a work assembly, such as a material storage section, a screed, a conveyor device, a 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] Threaded connections generally include a screw and / or a threaded nut with a threaded head. The screw head and / or the threaded nut typically have, for example, a hexagonal profile or a hexagonal outer or inner profile driver that can be driven with a wrench to loosen the threaded connection. A problem exists in that the abrasive nature of asphalt or other paving materials, such as gravel, can cause wear of the screw head and / or the threaded nut over time in contact with the asphalt. This results in material and shape loss 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 component replacement at the end of its useful life very difficult. When mounting elements are worn / worn in this way, the components must be laboriously separated from the work assembly or chassis using an angle grinder.

[0004] DE 10 2022 102 095 A1 describes an asphalt paver equipped with a distributor auger for distributing asphalt ahead of a screed. One or more auger segments are connected to the auger shaft by a plurality of attachment elements (bolts with bolt heads and nuts). DE 10 2022 102 095 A1 further discloses that the auger segments have U-shaped receiving portions for the attachment elements. The side walls of the receiving portion extend linearly 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 because the side walls of the receiving part can provide the mounting element with abrasion protection (wear protection) against potentially abrasive road surface or paving materials, respectively. However, the mounting element is difficult to reach with a wrench because it is surrounded by the side walls of the receiving part. Even if the mounting element could be removed with a two-part tool, such as a wrench socket and socket wrench, such a two-part tool is more difficult to use than a single-part wrench. In addition, paving material can accumulate in the recess and harden there, making 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 main body, paving material accumulates on the recess wall as the auger rotates, resulting in asphalt accumulation and entrainment in the recess. Asphalt accumulated in the recess must then first be removed for a removal tool to reach and remove the mounting element, which significantly increases the effort involved in replacing the auger segment. 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 pavers 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 present invention relates to a road paver for forming a paving layer made of paving material that is conveyed from a material storage section of the road paver to a lateral distributor assembly of the road paver in a direction opposite to the paving direction of the road paver and distributed by the lateral distributor assembly transversely to the paving direction of the road paver substantially across the working width of the screed of the road paver, the road paver comprising at least replaceable components that contact the paving material during operation of the road paver and at least one mounting unit for mounting the replaceable components to a work assembly or a chassis of the road paver, the road paver being provided with a wear protection for the mounting unit. The wear protection according to the present invention comprises a sacrificial body for installation on the mounting unit and / or a protective body that is at least partially ramp-shaped or curved and has a protective section that guides the paving material over the mounting unit. The mounting unit can have an outer contour, in particular an angular outer contour.

[0007] The present invention advantageously completely prevents or reduces the abrasive effect between the mounting unit and the hot, abrasive paving material, thereby extending the useful 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 useful life or when upgrading the road paver, thereby allowing for 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 as 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, thus forming 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 wearing away. The ramp-shaped or curved protective section can even accelerate the paving material being guided along it, thereby facilitating its guidance through the mounting unit. In addition to its 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 present invention, recesses formed for mounting units with parallel-arranged side walls create a retention 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 on the side wall is then easily accessible to the mounting unit. The protective effect against wear achieved by the present invention is therefore only possible to a limited extent based on the known accommodation of the mounting unit in the recess. Instead, the known recess is used to fix the hexagonal component received therein against rotation.

[0011] It is also conceivable that the mounting unit, in particular the screw head formed thereon, e.g., a hexagonal component, is received in a recess. The recess can be dimensioned such that the screw head, in particular the hexagonal component, received therein cannot rotate in the assembled state. The recess can be an integral part of the workpiece assembly, e.g., a drive shaft. The recess is in particular a push-fit receptacle 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 optimal locking of the replaceable component.

[0012] The protective body, in particular the protective section, can be arranged only on the side of the mounting unit facing the conveyed paving material. This side, which can be referred to as the first side of the mounting unit, forms a flank facing the material flow direction, on which the protective section is located, in order to guide the paving material conveyed toward the mounting unit. And because the protective section stands in front of the mounting unit as a protective shield, i.e., extends only on this side of the mounting unit, the second side of the mounting unit opposite the first side is advantageously freely accessible by a removal tool, such as a wrench. This allows the mounting unit to be removed with a single-part tool, such as a wrench, greatly simplifying component replacement.

[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 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 configured 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 can be removably connected 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 abrasive effects of abrasive paving materials, e.g. against frictional wear and heat.

[0017] The sacrificial body can include a wear-resistant composite material or multiple wear-resistant composite materials, which can extend 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 can include or be made of a wear-resistant cast alloy, which can extend 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).

[0020] The sacrificial body can be made from a plastic material that has high wear resistance 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 from, for example, polyetheretherketone, polyphenylene sulfide, polyethyleneimine, polytetrafluoroethylene.

[0021] The sacrificial body can 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 with an inner contour configured to receive the outer contour of the screw head and / or 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. The single-piece component can be attached to the mounting unit without the need for an additional threaded 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 installed 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 a screw connection. This allows the wear protection to be advantageously removed from the mounting unit when the replaceable component's useful life has ended (when the component needs to be replaced and the mounting unit needs to be removed for this purpose), if the wear protection has not yet completely worn / worn off. The multi-component device can comprise two shells or half shells, which are spaced apart or connected to each other so that they can rotate about an axis of rotation. After the two components or two shells of the multi-component device are attached to the mounting unit, the two components can be connected to each other and / or to the mounting part by 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 piece or multiple pieces, can be attached to the mounting unit by a press-fit. The press-fit connection allows the protective unit to 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 may or may not be removable. The press-fit connection between the mounting unit and the sacrificial body can be achieved by screwing or pressing the sacrificial body onto the edges of the screw head and / or 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 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 may 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 to prevent movement of the sacrificial body relative to the mounting unit.

[0028] Alternatively, the sacrificial body can be connected to the mounting unit with a positive substance-fit connection, which 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 protector, in particular its protective section, can be inclined towards the mounting unit. When the protective section is inclined towards the mounting unit, the inner surface of the protective section and the outer wall of the screw nut are not parallel to each other. When the protector or each of the protective sections is formed to be inclined towards the mounting unit, the outer wall angle between the inner surface of the protector or each of the protective section and the outer wall of the screw nut is less than 90 degrees. The protective section can extend over the entire height of the screw head and / or the screw nut.

[0032] The protective section can 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 that would lead 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, and 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 may have an upper end and a lower end, and a first distance between the upper end of the protective section and the mounting unit may 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] The 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 can be mounted separately, 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 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 protector can be made from steel having a hardness of at least 50 to 300 HBW, preferably 100 to 150 HBW.

[0044] The protector can include one or more wear-resistant composite materials, which can extend the useful life of the mounting unit.

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

[0046] The protective body may include or be made of a wear-resistant cast alloy, which may extend the service 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).

[0047] The paving material can be transported along a paving material transport line past a plurality of mounting units, for example in a transport direction from a material storage area through a material tunnel in a road paver tractor to a screed. Each sacrificial body can be installed on all or some of the mounting units. Each protective body can be positioned adjacent to all or some of the mounting units.

[0048] It is also possible to provide a respective protection for two adjacent mounting units or for each of them.

[0049] The lateral distributor assembly may include a shaft. The lateral distributor assembly may include a distributor auger removably coupled to the shaft by a mounting unit. The distributor auger may include a body mounted on the shaft. The distributor auger may include 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 replaceable components of the road paver, particularly 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 rotational 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 configured in one piece with the distributor auger, in particular the body, in particular as a cast component, which avoids the effort required for 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 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 protector may be attached to the shaft, preferably with a base of the protector extending along the circumference of the shaft, and preferably with the protective section disposed at an angle to the base.

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

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

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

[0059] [Figure 1] FIG. 1 shows a side view of a road paver for forming a paving layer. [Figure 2] FIG. 2 shows a perspective view of a road paver with a screed. [Figure 3] FIG. 3 shows a top view of a screed with laterally setback extension members. [Figure 4] FIG. 4 shows the screed of FIG. 3 with laterally extending extension members. [Figure 5] FIG. 5 shows a screed having an extended extension member and widening sections attached to it at the sides to achieve the desired working width. [Figure 6] FIG. 6 shows a perspective view of a road paver lateral distributor assembly. [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 INVENTION

[0060] FIG. 1 shows a road paver 1 for forming a paving layer 2 on a substrate 3. The road paver 1 has a material storage section 4 ahead of the paving direction R. A longitudinal conveyor device 5 transports paving material 6 stored in the material storage section 4 from the material storage section 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 disposed within a chassis 8 of the road paver 1 and includes a scraper belt 9 (see FIG. 4). The scraper belt 9 includes 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 lateral distributor assembly 10 disposed ahead of the screed 7. The lateral distributor assembly 10 is configured to distribute the paving material 6 ahead of the screed 7 transversely to the paving direction R.

[0061] Figure 2 shows a perspective view of the road paver 1. 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 shown by 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 a schematic top view of the screed 7 with the extension members 12 extended. Widening the screed 7 in this way allows for a longer working width B for the newly formed paving layer 2. Figure 4 also shows that the lateral distributor channels 15 are extended laterally beyond the screed base 11. Paving material 6 deposited by the scraper belts 9 can be transported along the widened lateral distributor channels 15 to the outside of the extension members 12. The lateral distributor assemblies 10 located in the lateral distributor channels 15 in Figure 4 are also extended in a similar manner.

[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 prescraper 17 mounted laterally on the screed base 11. Depending on the set working width B, the channel plate 16 and the prescraper 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 laterally 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 (attachment) 18 attached laterally to the paving direction R, along which a lateral distributor channel 15 is formed. To further extend the lateral distributor channel 15 depending on the working width B, further channel plates 16 and press scrapers 17 are installed.

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

[0067] The outer end of each shaft 21 a, 21 b, i.e. the end opposite the auger suspension 20, is mounted in an auger bearing 22 a, 22 b. Each auger bearing 22 a, 22 b is mounted at the lower end of an auger bearing bracket 23 a, 23 b. These auger bearing brackets 23 comprise substantially vertically aligned tubes 24 a, 24 b that 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-cohesive mixture, such as gravel. Asphalt mixtures consist of an aggregate mixture with a very high percentage of crushed stone, preferably with polymer-modified bitumen as a binder. Paving material 6 with such hard particles rubs against the mounting unit 26 of the road paver 1 that comes into contact with the paving material (see below: Figure 7, left: screw-nut connection; Figure 7, center: screw connection; Figure 7, right: bolt-nut connection), causing wear on the mounting unit 26, making it difficult to easily remove with tools 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 a road paver 1 .

[0071] The mounting unit 26 connects replaceable components 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 storage section 4, the longitudinal conveyor device 5, the screed 7 or the lateral distributor assembly 10. The replaceable components 30, in particular those against which the paving material 6 flowing from the material storage section 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 embodiments of the wear protection 27 for the mounting unit 26 will be described as an example using the wear protection 27 employed in the lateral distributor assembly 10. Such 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 portion of the lateral distributor assembly 10. As described above, the lateral distributor assembly 10 includes 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 includes a body 33 mounted on the shaft 21 and an auger blade 34 extending from the body 33 and surrounding the shaft 21. The distributor auger 19, specifically the body 33 of the distributor auger 19, is attached to the shaft 21 of the lateral distributor assembly 10 by the mounting units 26. In FIG. 8, the mounting units 26 are present in the form of a screw-nut connection. Each mounting unit 26 includes a screw 28 having 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 left side view 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 seats on and completely covers the screw nut 29 or cap nut 29a of the mounting unit 26, respectively. It is also possible for the sacrificial body 32 not to completely cover the screw nut 29 or cap nut 29a of the mounting unit 26. An additional sacrificial body can be installed on the screw head 28a on the opposite side from 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 sacrificial body 32) in the region of the screw nut 29 or cap nut 29a, respectively. The distributor auger 19 or auger blades 34, respectively, rotate in a rotational 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 the rotational direction 35 of the distributor auger 19.

[0075] 9 shows a schematic diagram of a single-piece embodiment of a 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′ includes a receiving area 37 having an inner contour 38 configured to receive the screw head 28a, 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 positioned / attached to the hexagonal screw nut 29 or cap nut 29a, or to the hexagonal screw head 28a, respectively, via a press-fit.

[0076] FIG. 10 shows a schematic diagram of a multi-piece embodiment of a sacrificial body 32″. The sacrificial body 32″ is configured as a multi-piece or two-piece structural device 32b (two-piece sacrificial body 32″). The two-piece sacrificial body 32″ comprises a receiving area 37′ having an inner contour 38′ configured to receive a screw head 28a or a screw nut 29 or a cap nut 29a, respectively. The receiving area 37′ is provided as an opening in the sacrificial body 32″. The two-piece sacrificial body 32″ comprises two half shells 40a, 40b. Once the half shells 40a, 40b are applied to the mounting unit 26, they can be attached to each other by threaded 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 protector 42 for the mounting unit 26. The protector 42 is arranged only on a first side 43 of the mounting unit 26 facing the paving material 6 to shield the mounting unit 26 from contact with the paving material 6, or at least to a very limited extent. A side (second side) 44 of the mounting unit 26 located opposite the side 43 facing the paving material 6 does not have an additional protector 42, for example. As a result, the mounting unit 26 is freely accessible from the second side 44, for example with a wrench, and therefore can be easily removed. FIG. 11 also shows that the body 33 has a recess 39 that receives the hexagonal screw head 28 a of the mounting unit 26 (i.e., on the side opposite the installation side of the cap nut 29 a (see FIG. 13 ) and receives the screw head 28 a with a non-rotatable push-fit).

[0079] In Figure 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. Figure 11 shows that the distributor auger 19 is assembled from multiple segments A, B, i.e., multiple auger blades 34, that are installed adjacent to each other.

[0080] FIG. 12 shows a perspective view (partial view) of the lateral distributor assembly 10 having an integrally formed guard 42 for the mounting unit 26. It can be seen that the guard 42 has a ramp-shaped or arcuate guard section 45 that slopes toward the mounting unit 26. The guard 42 or guard section 45, respectively, extends from the body 33 of 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 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 having 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 surface 48, and a distance 49 between the inner surface 48 of the guard section 45 and the mounting unit 26 varies along a length 50 of the inner surface 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 that is opposite to the direction of rotation 35 of the auger blade 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. The protector section 45 of the protector 42 extends in an arc from the base 51 to the upper end 54 of the cap nut 29a. The protector section 45 forms an angle with the base 51.

Claims

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

2. 2. A 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. A road construction 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) attached to the screw (28).

4. 4. A road building machine according to claim 3, characterized in that the protective section (45) is inclined towards the mounting unit (26) and extends over the entire height (46) of the screw head (28a) and / or the screw nut (29).

5. Road building machine according to any one of claims 1 to 4, characterized in that the protective section (45) is configured substantially in the form of a shield.

6. 6. A road construction machine according to any one of claims 1 to 5, 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) as a separate component, separate from the replaceable component (30).

7. 7. A road construction machine according to claim 1, wherein the lateral distributor assembly (10) comprises a shaft (21) and at least one distributor auger (19) removably mounted on the shaft (21) by 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 the replaceable component (30) of the road paver (1).

8. A road construction machine as described in Claim 7, characterized in that the protective section (45) extends along a curvature direction (K) opposite to the rotation direction (35) of the auger blade (34).

9. 9. A road building machine according to claim 7 or 8, characterized in that the protection body (42) is formed integrally with the distributor auger (19) or is formed separately from the distributor auger (19) as a separate component.

10. 10. The road construction machine according to claim 7, wherein the protection body (42) is attached to the shaft (21) as a separate component, the base (51) of the protection body (42) extends along the circumferential surface (52) of the shaft (21), and the protection section (45) forms a predetermined angle with the base (51).

11. 7. A road construction machine according to claim 1, wherein the replaceable component (30) is a widening portion (18) of the screed (7) for the attachment of the screed (7) to the screed base (11) by means of the attachment unit (26), and / or a press scraper (17) for the attachment of the screed (7) to the screed base (11) by means of the attachment unit (26), and / or a channel plate (16) for the attachment to the chassis (8) by means of the attachment unit (26).

12. A road paver (1), comprising: a paving layer (6) made of paving material (6) that is transported from a material storage section (4) of the road paver (1) to a lateral distributor assembly (10) of the road paver (1) in a direction opposite to the paving direction (R) of the road paver (1), and distributed by the lateral distributor assembly (10) transversely to the paving direction (R) of the road paver (1) substantially across a working width (B) of a screed (7) of the road paver (1). 2), the road paver (1) comprising at least a replaceable component (30) that comes into contact with the paving material (6) during operation of the road paver (1), and at least one mounting unit (26) for mounting the replaceable component (30) to a work assembly (31) or chassis (8) of the road paver (1), wherein a wear protection (27) for the mounting unit (26) is provided on the road paver (1); the wear protection (27) comprises a sacrificial body (32) for installation on the mounting unit (26); The mounting unit (26) includes a screw (28) having a screw head (28a) and a screw nut (29) attached to the screw (28); The road paver (1), 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 threaded nut (29).

13. A road construction machine as described in claim 12, characterized in that the sacrificial body (32) is a single-piece component (32a) or a multi-piece structural device (32b).

14. 14. Road building machine according to claim 12 or 13, characterized in that the sacrificial body (32) is attached to the mounting unit (26) by a press fit and / or a push fit.

15. Road building machine according to claim 12 or 13, characterized in that the sacrificial body (32) is connected to the mounting unit (26) with a force fit and / or a positive substance fit.

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