Road paver

Abstract

The utility model relates to a road paver (1) for producing a paving layer (2) from a paving material (6) which is conveyed from a material silo (4) of the road paver (1) against a paving direction (R) of travel of the road paver (1) to a transverse distributor device (10) of the road paver (1), the paving material (6) is substantially distributed over a working width (B) of a paving screed (7) of the road paver (1) by means of a transverse distributor device (10) which is transverse to the paving travel direction (R) of the road paver (1), the utility model relates to a road paver (1) having an exchangeable part (30) which is in contact with a paving material (6) at least during operation of the road paver (1) and at least one fastening unit (26) for fastening the exchangeable part (30) to a working unit (31) or a chassis (8) of the road paver (1), a wear protection device (27) for the fastening unit (26) being provided on the road paver (1), the wear protection device (27) has a sacrificial body (32) for placement on the fastening unit (26) and / or a protective body (42) with a protective section (45), which is at least partially in a ramp-shaped or curved shape and guides the paving material (6) away from the fastening unit (26).

Description

Technical Field

[0001] The utility model relates to a road paver. Background Art

[0002] A road paver is provided for producing a paving layer from a paving material such as asphalt, and generally includes a chassis and working units arranged on the chassis, such as a material silo, a paving screed, a conveying device, a transverse distributor device. The road paver has replaceable components, and each component is releasably directly fastened to the chassis and / or the working units by means of one or more screw connectors. The replaceable components will wear out and thus need to be replaced at the end of their service life.

[0003] The screw connectors generally include screws having screw heads and / or nuts. The screw heads and / or nuts generally have driving parts, such as hexagonal profiles or hexagonal external or internal profiles, which can be driven by a wrench to loosen the screw connectors. The problem is that the abrasiveness of asphalt or other paving materials (such as gravel) causes the screw heads and / or nuts in contact with the asphalt to wear over time. This results in the loss of material and shape on the surface of the screw connectors. The outer profiles of the screw connectors or the screw heads and / or nuts will lose their angular shapes and become rounded, so that they can no longer be clamped by means of standard tools (such as socket wrenches, ring wrenches, open-end wrenches, ratchet wrenches with nut attachments). This makes it more difficult to replace the components at the end of their service life. If the fastening elements are so worn / abraded, the components must be separated from the working units or the chassis in a complicated manner using an angle grinder.

[0004] A bituminous road paver is known from DE 10 2022 102 095 A1, which has a distributor screw for distributing bitumen in front of the screed. One or more screw segments are coupled to the screw shaft via a plurality of fastening elements (bolts with bolt heads and nuts). DE 10 2022 102 095 A1 also discloses that the screw segments have U-shaped receptacles for the fastening elements. The side walls of the receptacles extend straight from the body and define grooves or U-shaped grooves. DE 10 2022 102 095 A1 discloses that the bolt heads and nuts of the fastening elements engage into their respective grooves. According to DE 10 2022 102 095 A1, such an arrangement can prevent wear on the fastening elements, since the side walls of the receptacles can provide abrasion protection (wear protection) for the fastening elements against potentially abrasive road or paving materials. However, the fastening elements are surrounded by the side walls of the receptacles, making it difficult for a wrench tool to access them. Even if a two-piece tool such as a nut and socket wrench can be used to loosen the fastening elements, this two-piece tool is more difficult to use than a one-piece wrench. Additionally, paving material can accumulate in the grooves and harden therein, further complicating the replacement of the screw segments. Since the side walls of the U-shaped grooves extend straight from the body here, when the screw rotates, the paving material accumulates on the walls of the grooves, resulting in the accumulation and entrainment of bitumen in the grooves. Then the bitumen accumulated in the grooves must first be removed so that the replacement tool can reach the fastening elements to loosen them, which significantly increases the workload of replacing the screw segments. Summary of the Utility Model

[0005] The object of the present utility model is to increase the service life of the fastening unit for connecting replaceable components on a road paver and simplify the assembly / dismantling of the replaceable components.

[0006] The present utility model relates to a road paver for producing a paving layer with paving material, the paving material being conveyed from the material hopper of the road paver to the transverse distributor device of the road paver against the paving travel direction of the road paver, and the paving material being distributed substantially over the working width of the screed of the road paver by means of the transverse distributor device transverse to the paving travel direction of the road paver, wherein the road paver has at least a replaceable component that comes into contact with the paving material during the operation of the road paver and at least one fastening unit for fastening the replaceable component to the working unit or chassis of the road paver, and wherein a wear protection device for the fastening unit is provided on the road paver. According to the present utility model, the wear protection device has a sacrificial body for placement on the fastening unit and / or a protection body with a protection section, the protection section being at least partially ramp-shaped or curved and deflecting the paving material away from the fastening unit. The fastening unit can have an outer contour, in particular an angular outer contour.

[0007] With the present utility model, it is possible to advantageously completely prevent or reduce the grinding action between the fastening unit and the hot and abrasive paving material. This increases the service life of the fastening unit and protects its outer contour, such that the fastening unit can be loosened, for example, by means of a one-piece tool such as a wrench, and can be disassembled or the road paver can be changed at the end of the service life of the replaceable part without any problems. This in turn enables the fastening unit to be replaced easily and quickly.

[0008] Using a sacrificial body as an attachment on the fastening unit is particularly cost-effective and practical because the sacrificial body can be easily mounted on at least a part of the fastening unit. In particular, the sacrificial body can be placed in the form of a cap on the part of the fastening unit that can be gripped by a tool, for example on a nut, in order to "sacrifice" itself to protect it.

[0009] The ramp-shaped or curved protection section deflects the paving material away from the fastening unit, thereby forming a guiding device to guide the paving material in the direction of reduced grinding action, such that the paving material is guided over the fastening unit to prevent its wear. Here, the ramp-shaped or curved protection section can even accelerate the paving material guided along it, making it easier to pass over the fastening unit. In addition to its guiding function, the ramp-shaped or curved protection section can also act as a sacrificial body.

[0010] On the other hand, compared with the protection section according to the present utility model, the groove formed for the fastening unit with parallel side walls causes a clogging effect because the paving material slows down on the vertically standing side walls and can thus accumulate thereon. Then, the accumulated paving material decelerated at the side walls can easily reach the fastening unit. Therefore, due to the known accommodation of the fastening unit in the groove, the anti-wear protection effect achieved by the present utility model can only be achieved to a limited extent. Instead, the known groove is used to fix the hexagon (Sechskant) accommodated therein to prevent twisting.

[0011] It is conceivable that the fastening unit - in particular the screw head (e.g., hexagon) formed thereon - is accommodated in the groove. The dimensions of the groove can be designed such that the screw head (in particular the hexagon screw head) accommodated therein cannot rotate in the assembled state. The groove can be an integral part of a working unit (e.g., a drive shaft). The groove serves in particular as a form-fitting accommodation for the fastening unit on the opposite side of the wear protection device assigned to the fastening unit. In addition to the positive effects resulting from the wear protection device described above, this also provides optimal locking of the replaceable part.

[0012] The protective body - in particular the protective segment - can only be arranged on the side of the fastening unit facing the conveyed paving material. This side can be referred to as the first side of the fastening unit and forms a flank facing the material flow direction, on which the protective segment is positioned in order to divert the paving material conveyed towards it on the fastening unit. Since the protective segment stands in front of the fastening unit as a protective cover, i.e., only extends on this side of the fastening unit, the replacement tool (e.g., a wrench) can advantageously have free access to the second side of the fastening unit, which is opposite to the first side. This significantly simplifies the replacement of components because the fastening unit can be loosened with a one-piece tool (e.g., a wrench).

[0013] The fastening unit can include screws with screw heads and / or nuts and / or screw connections consisting of screws and nuts (in particular cap nuts). The nut can be a hexagon nut or a cap nut. The nut can be fastened to the screw or to the screw pin of the screw. The nut and / or the screw head can have a hexagonal profile. The screw can include a bolt with a thread.

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

[0015] The fastening unit can be a replaceable part, such as the screw blade of a transverse distributor device with a working unit (e.g., a drive shaft), or another replaceable part that can be detachably connected to the chassis of a road paver.

[0016] The sacrificial body can be designed such that when the sacrificial body is placed on the fastening unit (e.g., on the screw), the sacrificial body completely covers the screw head and / or the nut (in particular the cap nut). Thereby, the fastening unit can be reliably protected against the grinding action of the abrasive paving material, e.g., against frictional wear and heat.

[0017] The sacrificial body can have one or more wear-resistant composite materials. Thereby, the service life of the fastening unit can be extended.

[0018] The sacrificial body can consist of one or more wear-resistant composite materials. Thereby, the service life of the fastening unit can be extended.

[0019] The sacrificial body can have a wear-resistant casting alloy or consist of a wear-resistant casting alloy. Thereby, the service life of the fastening unit can be extended. The wear-resistant casting 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 of a plastic with high wear resistance and / or heat resistance. The working temperature of the plastic can exceed 150 °C. The working temperature range of the plastic is from 150 °C to 300 °C. The sacrificial body can be made of, for example, polyetheretherketone, polyphenylene sulfide, polyethyleneimine, or polytetrafluoroethylene.

[0021] The sacrificial body can be made of steel with a hardness of at least 50 HBW to 300 HBW, preferably 100 HBW to 150 HBW.

[0022] The sacrificial body can serve to prevent contact between the fastening unit and the paving material, preferably until the sacrificial body is at least partially worn / abraded.

[0023] The sacrificial body can have a receiving area with an inner contour that is designed to receive the outer contour of a screw head and / or nut.

[0024] In one embodiment, the wear protection device (especially the sacrificial body) can be a one-piece assembly. Advantageously, the one-piece assembly can be easier to operate and / or assemble. The one-piece assembly can be attached to the fastening unit (for example, by pressing the assembly onto the fastening unit) without the need for additional screw connections. Such an assembly can have the shape of a substantially cap nut, which can be slipped over the nut of the fastening unit, especially over the cap nut of the fastening unit.

[0025] In an alternative embodiment, the wear protection device (especially the sacrificial body) can be a multi-piece construction device. The multi-piece construction device can be detachably attached to the wear protection device, for example, by means of screw connections. Thus, if the wear protection device has not been completely worn / abraded at the end of the service life of the replaceable part (when the part is to be replaced and the fastening unit should be loosened for this purpose), the wear protection device can be advantageously removed from the fastening unit. The multi-piece construction device can have two shells or half-shells that are separated from each other or rotatably connected to each other about a rotational axis. After the two parts or two shells of the multi-piece construction device are attached to the fastening unit, the two parts can be connected to each other and / or to the fastening unit by means of one or two screw connections. It is conceivable that the wear protection device can be formed on the fastening unit in the form of a clamp that can be detachably attached to the fastening unit.

[0026] The sacrificial body can be attached to the fastening unit in a force - fit manner, whether it is one - piece or multi - piece. Due to the force - fit connection, the protection unit can be firmly mounted on the fastening unit, or even the movement of the protection unit relative to the fastening unit can be completely prevented. This in turn prevents friction between the sacrificial body and the fastening unit. The force - fit connection between the fastening unit and the sacrificial body can be detachable or non - detachable. The force - fit connection between the fastening unit and the sacrificial body can be achieved by screwing or pressing the sacrificial body onto the edge of the screw head and / or nut. The force - fit connection between the fastening unit and the sacrificial body can be achieved by elastic and / or plastic deformation of the sacrificial body, especially at the edge of the screw head and / or nut.

[0027] Alternatively, the sacrificial body can be attached to the fastening unit in a form - fit manner. The form - fit connection between the sacrificial body and the fastening unit can be detachable or non - detachable. The form - fit connection can be a snap - in connection. For the form - fit connection between the sacrificial body and the fastening unit, the inner contour of the sacrificial body and the outer contour of the fastening unit can have a negative contour and a positive contour respectively. The negative contour and the positive contour can engage with each other to prevent the movement of the sacrificial body relative to the fastening unit.

[0028] Alternatively, the sacrificial body can be connected to the fastening unit in a material - fit manner. The material - fit connection can be a welding connection, a brazing connection or an adhesive connection.

[0029] The sacrificial body can in particular be a casting.

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

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

[0032] The protection section can be inclined towards the fastening unit so that (especially in the relative flow direction of the paving material) contact between the fastening unit and the paving material is prevented, at least no grinding contact occurs, which would cause wear of the fastening unit.

[0033] The protection section can basically have the shape of a half - shell. The thickness / width of the half - shell can be the same along the length or thickness direction.

[0034] The protection section can have an inner side and an outer side. The distance between the inner side of the protection section and the fastening unit can vary along the inner side.

[0035] On the inner side of the half-shell, there may be a groove for receiving the entire screw head and / or the entire nut.

[0036] The protection section can basically be designed in the form of a protective cover.

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

[0038] The protection section can extend radially from the lower end of the protection section to the upper end of the protection section.

[0039] The lower end of the protection section can be connected to the outer surface of the working unit.

[0040] In one embodiment, the protection body can be designed as an extension of the component. This avoids additional work when assembling the protection body on the road paver or the working unit of the road paver.

[0041] In an alternative embodiment, the protection body can be fastened to the road paver separately from the component (i.e., as a separate component), preferably fastened to the working unit, especially to the rotating working unit or the chassis of the road paver. Here, it is advantageous that the protection body can be assembled / dismantled or replaced separately from the component.

[0042] The protection body, especially the upper end of the protection section, can extend to the upper end of the fastening unit (especially the screw head or nut). The protection body - especially the upper end of the protection section - can extend beyond the fastening unit, especially the screw head or nut.

[0043] The protection body can be made of steel with a hardness of at least 50 HBW to 300 HBW, preferably 100 HBW to 150 HBW.

[0044] The protection body can have one or more wear-resistant composite materials. Thereby, the service life of the fastening unit can be extended.

[0045] The protection body can consist of one or more wear-resistant composite materials. Thereby, the service life of the fastening unit can be extended.

[0046] The protection body can have a wear-resistant casting alloy or consist of a wear-resistant casting alloy. Thereby, the service life of the fastening unit can be extended. The wear-resistant casting alloy can be selected from the following group: Ni-Hard, EN-GJN-HV600, EN-GJN-HV600(XCr18) or EN-GJN-HV600(XCr23).

[0047] Along the conveying route of the paving material in the conveying direction, the paving material can be conveyed past a plurality of fastening units, for example, from a material silo to a paving screed through a material passage in a tractor of a road paver. The sacrificial body can be placed on all or some of the fastening units. The protective body can be arranged next to all or some of the fastening units.

[0048] A protective body can be provided for each or two adjacent fastening units.

[0049] The transverse distributor device can have a shaft. The transverse distributor device can have a distributor screw detachably coupled to the shaft by means of a fastening unit. The distributor screw can have a body placed on the shaft. The distributor screw can have a helical screw blade extending from the body and running around the shaft. The distributor screw - at least some segments of which are in contact with the paving material - can be a replaceable part of a road paver, in particular of the transverse distributor device of a road paver.

[0050] The fastening unit can extend perpendicular to the axis of rotation of the shaft.

[0051] The protective body can extend along a curvature direction opposite to the rotation direction of the screw blade. As a result, the protective body extends along the relative flow direction of the paving material conveyed by the rotation of the screw blade. This can in turn reduce the forces caused by the conveyed paving material that cause abrasion on the protective body and protect the protective body itself from wear.

[0052] The protective body can be designed integrally with the distributor screw (in particular with the body), especially as a casting. In this way, the work required for additionally assembling the protective body on the transverse distributor device can be avoided.

[0053] Alternatively, the protective body can be designed as a separate part separated from the distributor screw. Thereby, the protective body can be replaced independently of the distributor screw. This also makes the manufacturing cost of the distributor screw lower.

[0054] The protective body can surround at least a part of the shaft. In other words, the protective body can extend radially around a part of the shaft or extend around a part of the shaft. Thereby, the protective body provides wear protection not only for the fastening unit but also for the shaft.

[0055] The protective body can be fastened to the shaft. Preferably, the base part of the protective body extends along the circumferential surface of the shaft. The protective section is preferably arranged at a predetermined angle to the base part.

[0056] The material silo, the conveying device of a road paver for conveying the paving material from the material silo to the transverse distributor device, the transverse distributor device or the paving screed can all be working units of the road paver. The replaceable part can be a widening part of the paving screed for fastening to the screed base body of the paving screed. The replaceable part can be a pre-scraper (Vorabstreifer) for fastening to the screed base body of the paving screed. The replaceable part can be a channel plate for fastening to the chassis. As described above, the replaceable part can in particular be the distributor screw of the transverse distributor device.

[0057] The wear protection device according to the present utility model can basically be used for those fastening units attached to a road paver, which are used for detachably fastening components and can be in contact with the road paver during the operation of the road paver with respect to the material movement caused on the road paver. Description of the Drawings

[0058] The present utility model will be explained in more detail based on the following embodiments of the drawings. The drawings show:

[0059] Figure 1 A side view of a road paver for producing a paving layer is shown,

[0060] Figure 2 A perspective view of a road paver with a paving screed is shown,

[0061] Figure 3 A top view of a paving screed with a retracted pull-out part on the side is shown,

[0062] Figure 4 It shows Figure 3 The paving screed with a laterally extended pull-out part in

[0063] Figure 5 A paving screed is shown, which has an extended pull-out part and a widening component laterally fastened to the paving screed for generating the required working width,

[0064] Figure 6 A perspective view of the transverse distributor device of the road paver is shown,

[0065] Figure 7 A schematic view of an embodiment of the fastening unit is shown,

[0066] Figure 8 A perspective view (partial view) of the transverse distributor device with a protection unit in the form of a sacrificial body for the fastening unit is shown,

[0067] Figure 9 A schematic view of a one-piece embodiment of the sacrificial body is shown,

[0068] Figure 10 A schematic view showing a multi-piece embodiment of the sacrificial body

[0069] Figure 11 A perspective view (partial view) of a transverse distributor device having a wear protection device in the form of a protective body for a fastening unit

[0070] Figure 12 A perspective view (partial view) of a transverse distributor device having an integral protective body

[0071] Figure 13 A schematic view (partial view) of a transverse distributor device having an integral protective body, and

[0072] Figure 14 A perspective view (partial view) of a transverse distributor device having a separately designed protective body Detailed description of the invention

[0073] Figure 1 A road paver 1 for producing a paving layer 2 on a foundation 3 is shown. The road paver 1 has a material hopper 4 at its front in the paving travel direction R. Opposite to the paving travel direction R of the road paver 1, the paving material 6 accommodated in the material hopper 4 is transported to the paving screed 7 of the road paver 1 by means of a longitudinal conveyor 5. The longitudinal conveyor 5 is arranged in the chassis 8 of the road paver 1 and has a scraper belt 9 (see Figure 4 ). The scraper belt 9 includes a left scraper belt part 9a and a right scraper belt part 9b. The paving material 6 is conveyed from the scraper belt 9 of the longitudinal conveyor 5 to a transverse distributor device 10, which is positioned in front of the paving screed 7. The transverse distributor device 10 is designed to distribute the paving material 6 transversely to the paving travel direction R in front of the paving screed 7.

[0074] Figure 2 The road paver 1 is shown in a perspective view. The paving screed 7 has a screed base body 11 and a laterally extendable pull-out part 12 in order to set the desired working width B of the produced paving layer 2. By widening the paving screed 7 in this way, a greater working width B can be produced for the newly produced paving layer 2.

[0075] Figure 3Shows a top view schematic of the screed 7 of the road paver 1. The paving material 6 falls in front of the screed base 11 of the screed 7 by means of the scraper belt 9, as shown by the arrow P, and is distributed along the front side 13 of the screed base 11 by means of the transverse distributor device 10. The rear wall 14 of the chassis 8 of the road paver 1 and the front side 13 of the screed base 11 together form a transverse distributor channel 15 for the transverse distributor device 10. This transverse distributor channel 15 can be further laterally extended to correspond to the widening of the screed 7. As Figure 4 shown.

[0076] Figure 4 Shows in a schematic top view the screed 7 with the extended pull-out part 12. By widening the screed 7 in this way, a greater working width B can be produced for the newly produced paving layer 2. Figure 4 Shows that the transverse distributor channel 15 extends laterally beyond the screed base 11. The paving material 6 falling from the scraper belt 9 can be transported along the widened transverse distributor channel 15 to the outside of the pull-out part 12. Figure 4 The transverse distributor device 10 arranged in the transverse distributor channel 15 is also extended.

[0077] The transverse distributor channel 15 provided in front of the screed 7 is formed in its outer region transverse to the paving travel direction R by means of the channel plate 16 supported on the chassis 8 of the road paver 1 and by means of the pre-scraper 17 fastened to the side of the screed base 11. Depending on the set working width B, the channel plate 16 and the pre-scraper 17 can be further laterally extended to lengthen the transverse distributor channel 15. This also applies to the transverse distributor device 10.

[0078] Figure 5 Shows the screed 7, which has an extended pull-out part 12 and a widened part 18 fastened to the side thereof to produce a very large working width B for the paving layer 2. Figure 5 Shows that the transverse distributor channel 15 - along the screed base 11, the pull-out part 12 and along the widened part (additional component) 18 fastened thereto - is designed to be transverse to the paving travel direction R. Depending on the working width B, additional channel plates 16 and pre-scrapers 17 are installed to further expand the transverse distributor channel 15.

[0079] Figure 6A perspective view showing an embodiment of the transverse distributor device 10 is presented. The transverse distributor device 10 is fastened to the rear end of the chassis 8 of the road paver 1. The transverse distributor device 10 includes a distributor screw 19 or a right distributor screw 19a and a left distributor screw 19b (along the paving travel direction of the road paver 1). Both distributor screws 19a, 19b are mounted at the center of the screw suspension 20. In the housing formed by the screw suspension 20, there is a screw drive (not shown) for driving the two distributor screws 19a, 19b. The transverse distributor device 10 includes a shaft 21. Here, this can be two separate shafts 21 (right shaft 21a, left shaft 21b) or a common shaft 21 of the two distributor screws 19a, 19b. The right distributor screw 19a is detachably coupled to the shaft 21a. The left distributor screw 19b is detachably coupled to the shaft 21b.

[0080] The outer ends of each shaft 21a, 21b, that is, the ends facing away from the screw suspension 20, are supported in screw bearings 22a, 22b. Each screw bearing 22a, 22b is mounted at the lower end of a screw bearing bracket 23a, 23b. These screw bearing brackets 23 here have tubes 24a, 24b that are substantially vertically aligned and are fastened to the chassis 8 of the road paver 1 by means of fastening plates 25.

[0081] The paving material 6 can be a viscous mixture (such as asphalt) and / or a non-viscous mixture (such as gravel). The asphalt mixture can consist of an aggregate mixture with a very high proportion of crushed particles and preferably polymer-modified asphalt as a binder. This paving material 6 with hard particles undergoes friction with the fastening unit 26 of the road paver 1 that comes into contact with the paving material (see Figure 7 , left: screw-nut connection; Figure 7 , middle: screw connection; Figure 7 , right: bolt-nut connection) and causes wear of the fastening unit 26, such that the fastening unit 26 cannot be easily loosened with tools such as a wrench.

[0082] The present utility model provides a wear protection device 27 for the fastening unit 26, which will be described in more detail with reference to Figures 8 to 14 more specifically.

[0083] Figure 7 An embodiment of the fastening unit 26 used on the road paver 1 is shown.

[0084] The fastening unit 26 connects the replaceable part 30 of the road paver 1 to the chassis 8 or the working unit 31 of the road paver 1. The working unit 31 can be, for example, the material hopper 4, the longitudinal conveyor 5, the paving screed 7 or the transverse distributor device 10. The replaceable part 30 - in particular the part on which the paving material 6 flowing from the material hopper 4 to the transverse distributor device 10 rubs - is, for example, the widening part 18, the channel plate 16, the pre-scraper 17 and / or the distributor screws 19, 19a, 19b.

[0085] The construction principle of the embodiment of the wear protection device 27 for the fastening unit 26 is described exemplarily according to the wear protection device 27 used on the transverse distributor device 10. Such a wear protection device 27 can also be used for other fastening units 26 of the road paver 1, in particular for the fastening units 26 of the road paver 1 that come into contact with the paving material 6.

[0086] Figure 8 A perspective view of a part of the transverse distributor device 10 is shown. As described above, the transverse distributor device 10 includes a shaft 21 (right shaft 21a or left shaft 21b) and a distributor screw 19 detachably coupled to the shaft 21 by means of two fastening units 26. The distributor screw 19 has a body 33 placed on the shaft 21 and screw blades 34 extending from the body 33 and running around the shaft 21. The distributor screw 19 (in particular the body 33 of the distributor screw 19) is fastened to the shaft 21 of the transverse distributor device 10 by means of the fastening unit 26. In Figure 8 , the fastening unit 26 is presented as a screw-nut connection. The fastening unit 26 includes a screw 28 having a hexagonal screw head 28a and a nut 29 or cap nut 29a fastened to the other end of the screw 28 (see Figure 7 the left figure therein).

[0087] In this embodiment, the wear protection device 27 is designed as a sacrificial body 32 for placement on the fastening unit 26. In Figure 8 , the sacrificial body 32 is located on the nut 29 or cap nut 29a of the fastening unit 26 and completely covers the fastening unit 26. The sacrificial body 32 can also not completely cover the nut 29 or cap nut 29a of the fastening unit 26. On the opposite side, another sacrificial body can be placed on the screw head 28a. Thus, the sacrificial body 32 prevents contact between the fastening unit 26 and the paving material 6 flowing around the fastening unit 26 (or the sacrificial body 32) in the region of the nut 29 or cap nut 29a and thereby prevents friction. During the operation of the transverse distributor device 10, the distributor screw 19 or the screw blades 34 rotate in the rotational direction 35. In contrast thereto, the paving material 6 moves in a flow direction 36 that is substantially opposite to the rotational direction 35 of the distributor screw 19.

[0088] Figure 9 A schematic view showing a one-piece embodiment of the sacrificial body 32' is presented. The sacrificial body 32' is designed as a one-piece component 32a (one-piece sacrificial body 32'). The one-piece sacrificial body 32' has a receiving area 37 with an inner contour 38, which is designed to receive the screw head 28a or the nut 29 or the cap nut 29a. The receiving area 37 is provided as an opening of the sacrificial body 32'. The one-piece sacrificial body 32' can be arranged / fastened in a form-fitting manner on the hexagon nut 29 or the cap nut 29a, or on the hexagon screw head 28a.

[0089] Figure 10 A schematic view showing a multi-piece embodiment of the sacrificial body 32'' is presented. The sacrificial body 32'' is designed as a multi-piece or two-piece construction device 32b (two-piece sacrificial body 32''). The two-piece sacrificial body 32'' has a receiving area 37' with an inner contour 38', which is designed for receiving the screw head 28a or the nut 29 or the cap nut 29a. The receiving area 37' is provided as an opening of the sacrificial body 32''. The two-piece sacrificial body 32'' has two half-shells 40a, 40b. After the half-shells 40a, 40b are both applied to the fastening unit 26, the half-shells 40a, 40b can be fastened to each other by means of threaded connectors 41a, 41b.

[0090] Figure 11 A perspective view (partial view) of the lateral distributor device 10 is shown.

[0091] In Figure 11 the illustrated embodiment, the wear protection device 27 is designed in the form of a protective body 42 for the fastening unit 26. The protective body 42 is only arranged on the first side 43 of the fastening unit 26 facing the conveyed paving material 6 and laterally shields the fastening unit 26, such that the fastening unit 26 does not come into contact with the paving material 6 or only very rarely comes into contact with the paving material 6 in any case. The side (second side) 44 of the fastening unit 26 that is arranged opposite to the side 43 facing the conveyed paving material 6 is free, for example, separated from another protective body 42. Thus, the fastening unit 26 can be freely accessed (e.g., for a wrench tool) from the second side 44, and thus disassembly is convenient. Figure 11 It is also shown that the main body 33 has a groove 39 for receiving the hexagon screw head 28a of the fastening unit 26, i.e., on the side opposite to the cap nut 29a (see Figure 13 ), and the groove 39 receives the screw head 28a in a form-fitting manner, such that the screw head 28a cannot be distorted.

[0092] In Figure 11 it, the protective body 42 is designed as an integral part of the distributor screw 19 or the removable screw blade 34 in order to protect the cap nut 29a of the fastening unit 26. Figure 11It shows that the dispenser screw 19 is assembled from a plurality of segments A, B (i.e., a plurality of screw vanes 34) mounted adjacent to each other.

[0093] Figure 12 It shows a perspective view (partial view) of the lateral dispenser device 10 having an integral protective body 42 for the fastening unit 26. It can be seen here that the protective body 42 has a protective section 45 that is inclined, ramp-shaped or arcuate towards the fastening unit 26. The protective body 42 or the protective section 45 extends from the body 33 of the segment A of the dispenser screw 19. The protective body 42 or the protective section 45 is formed integrally with the dispenser screw 19. The protective section 45 extends over the entire height 46 of the nut 29 or the cap nut 29a. The protective section 45 is in the form of a semi-shell 47. The relative flow direction 36 of the paving material 6 and the rotation direction 35 of the dispenser screw 19 are shown.

[0094] Figure 13 It shows a schematic view (partial view) of the lateral dispenser device 10 having a protective body 42 for the fastening unit 26. In this embodiment, the protective section 45 does not extend over the entire height 46 of the nut 29 or the cap nut 29a. The protective section 45 has an inner side 48, and the distance 49 between the inner side 48 of the protective section 45 and the fastening unit 26 varies along the length 50 of the inner side 48. The rotation direction 35 of the dispenser screw 19 is shown. The protective body 42 (especially the protective section 45) extends along a curvature direction K opposite to the rotation direction 35 of the screw vane 34.

[0095] Figure 14 It shows a schematic view (partial view) of the lateral dispenser device 10 having another embodiment of the protective body 42. The protective body 42 is fastened to the shaft 21 as a separate component and has a base portion 51 that extends along the circumferential surface 52 of the shaft 21. The protective section 45 of the protective body 42 extends arcuately from the base portion 51 towards the upper end 54 of the cap nut 29a. The protective section 45 encloses a predetermined angle with the base portion 51.

Claims

1. A road paver (1) for producing a paving layer (2) with paving material (6), the paving material (6) being conveyed from a material silo (4) of the road paver (1) to a transverse distributor device (10) of the road paver (1) in the opposite direction to the paving travel direction (R) of the road paver (1), and the paving material (6) being distributed over a working width (B) of a paving screed (7) of the road paver (1) by means of a transverse distributor device (10) transverse to the paving travel direction (R) of the road paver (1), wherein: The road paver (1) has a replaceable component (30) which is in contact with the paving material (6) at least during the operation of the road paver (1), and at least one fastening unit (26) for fastening the replaceable component (30) to a working unit (31) or a chassis (8) of the road paver (1), wherein a wear protection device (27) for the fastening unit (26) is provided on the road paver (1), characterized in that the wear protection device (27) has a sacrificial body (32) for being placed on the fastening unit (26) and / or a protective body (42) with a protective section (45), which is at least partially constructed in a ramp-shaped or curved manner and guides the paving material (6) away from the fastening unit (26).

2. The road paver according to claim 1, characterized in that: The protective body (42) is arranged only on a side (43) of the fastening unit (26) that faces the conveyed paving material (6).

3. The road paver according to claim 1, characterized in that: The fastening unit (26) includes a screw (28) having a screw head (28a) and / or a nut (29) fastened to the screw (28).

4. The road paver according to claim 3, characterized in that: The nut (29) is a hexagonal nut (29b) or a cap nut (29a).

5. The road paver according to claim 2, characterized in that: The fastening unit (26) includes a screw (28) having a screw head (28a) and / or a nut (29) fastened to the screw (28).

6. The road paver according to claim 5, characterized in that: The nut (29) is a hexagonal nut (29b) or a cap nut (29a).

7. The road paver according to claim 3, characterized in that: When the sacrificial body (32) is placed on the fastening unit (26), the sacrificial body (32) is designed such that the sacrificial body (32) completely covers the screw head (28a) and / or the nut (29).

8. The road paver according to claim 7, characterized in that: The nut (29) is a cap nut (29a).

9. The road paver according to claim 5, characterized in that: When the sacrificial body (32) is placed on the fastening unit (26), the sacrificial body (32) is designed such that the sacrificial body (32) completely covers the screw head (28a) and / or the nut (29).

10. The road paver according to claim 9, characterized in that: The nut (29) is a cap nut (29a).

11. The road paver according to any one of claims 1 to 10, characterized in that: The wear protection device (27) is a one-piece component (32a) or a multi-piece construction (32b).

12. The road paver according to claim 11, characterized in that: The wear protection device (27) is the sacrificial body (32).

13. The road paver according to claim 11, characterized in that: The multi-piece construction device (32b) comprises two half shells (40a, 40b).

14. The road paver according to any one of claims 1 to 10, characterized in that: The sacrificial body (32) is fastened to the fastening unit (26) in a force-fitting and / or form-fitting manner.

15. The road paver according to claim 14, characterized in that: The sacrificial body (32) is fastened to a cap nut (29a) of the fastening unit (26) in a force-fitting and / or form-fitting manner.

16. The road paver according to any one of claims 1 to 10, characterized in that: The sacrificial body (32) is connected to the fastening unit (26) in a form-fitting and / or materially bonding manner.

17. The road paver according to any one of claims 1, 2 and 4, characterized in that: The protection section (45) is inclined toward the fastening unit (26).

18. The road paver according to any one of claims 3, 5 to 10, characterized in that: The protection section (45) is inclined toward the fastening unit (26).

19. The road paver according to claim 18, characterized in that: The protective section (45) extends over the entire height (46) of the screw head (28a) and / or the nut (29).

20. The road paver according to any one of claims 1 to 10, characterized in that The protective section (45) is designed in the form of a protective cover and has an inner side (48), and a distance (49) between the inner side (48) of the protective section (45) and the fastening unit (26) varies along a length (50) of the inner side (48).

21. The road paver according to any one of claims 1 to 10, characterized in that: The protective body (42) is designed as an integral extension of the replaceable component (30) or is separated from the replaceable component (30) and fastened to the road paver (1) as a separate component.

22. The road paver according to claim 21, characterized in that: The protective body (42) is fastened to the working unit (31) of the road paver (1) separately from the replaceable component (30) as a separate component.

23. The road paver according to any one of claims 1 to 10, characterized in that The transverse distributor device (10) has a shaft (21) and at least one distributor screw (19) which is detachably fastened to the shaft (21) by means of the fastening unit (26), wherein the distributor screw (19) has a body (33) placed on the shaft (21) and screw blades (34) extending from the body (33) and running around the shaft (21), wherein the distributor screw (19) is a replaceable component (30) of the road paver (1).

24. The road paver according to claim 23, characterized in that: The distributor screw (19) is a replaceable component (30) of a transverse distributor device (10) of the road paver (1).

25. The road paver according to claim 23, characterized in that: The protection body (42) extends along a curvature direction (K) opposite to the rotation direction (35) of the screw blade (34).

26. The road paver according to claim 25, characterized in that: The protection section (45) extends along a curvature direction (K) opposite to the rotation direction (35) of the screw blade (34).

27. The road paver according to claim 23, characterized in that: The protective body (42) is formed integrally with the distributor screw (19), or the protective body (42) is formed separately from the distributor screw (19) as a separate component.

28. The road paver according to claim 27, characterized in that: The protective body (42) is formed integrally with the main body (33), or the protective body (42) is formed separately from the distributor screw (19) as a separate component.

29. The road paver according to claim 25, characterized in that: The protective body (42) is formed integrally with the distributor screw (19), or the protective body (42) is formed separately from the distributor screw (19) as a separate component.

30. The road paver according to claim 28, characterized in that: The protective body (42) is formed integrally with the main body (33), or the protective body (42) is formed separately from the distributor screw (19) as a separate component.

31. The road paver according to claim 23, characterized in that: The protective body (42) is fastened to the shaft (21) as a separate component.

32. The road paver according to claim 31, characterized in that: The base portion (51) of the protection body (42) extends along the circumferential surface (52) of the shaft (21), and the protection segment (45) forms a predetermined angle with the base portion (51).

33. A road paver according to any one of claims 24 to 30, characterized in that The protective body (42) is fastened to the shaft (21) as a separate component.

34. The road paver according to claim 33, characterized in that: The base portion (51) of the protection body (42) extends along the circumferential surface (52) of the shaft (21), and the protection segment (45) forms a predetermined angle with the base portion (51).

35. A road paver according to any one of claims 1 to 10, characterized in that The replaceable component (30) is a widened portion (18) of the paving screed (7) for fastening to the screed base (11) of the paving screed (7) by means of the fastening unit (26), and / or a pre-scraper (17) for fastening to the screed base (11) of the paving screed (7) by means of the fastening unit (26), and / or a channel plate (16) for fastening to the chassis (8) by means of the fastening unit (26).

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