Road finisher with height-adjustable deflector plate

Abstract

The invention relates to a road paver (1) for producing a paving layer (2) from a paving material (6). The road paver (1) comprises a paving screed (7), a longitudinal conveyor device (5) designed to transport the paving material (6) to the paving screed (7) opposite to a direction of travel (100) of the road paver (1), a transverse distributor arrangement (9) designed to distribute the paving material (6) in front of the paving screed (7) transversely to the direction of travel (100), and a deflector plate arrangement (24) arranged in front of the transverse distributor arrangement (9) in the direction of travel (100). The deflector plate arrangement (24) has a height-adjustable deflector plate (26). The invention further relates to a method for operating a road paver (1).

Description

[0001] The present fulfillment relates to a road paver and a method for operating a road paver.

[0002] Road pavers are designed to produce a layer of paving material such as asphalt and usually include a chassis and working units arranged on the chassis, such as a material hopper, a screed, a longitudinal conveying device and a transverse distributor arrangement.

[0003] A fixed deflector plate is typically located at the rear end of the longitudinal conveyor. During paving, material can accumulate in the direction of travel of the asphalt paver as it is transferred from the longitudinal conveyor to the transverse distributor. These accumulations collect in front of the transverse distributor and can lead to segregation of the paving material and contamination of the undercarriage. This can only be partially prevented by the fixed deflector plates known from the prior art. Since sufficient ground clearance below the deflector plate, or a sufficiently large approach angle for loading the transport truck, must be ensured, the deflector plate cannot be positioned arbitrarily low vertically. If the deflector plate is not positioned high enough, loading the transport truck may be impaired or even impossible.Damage to the deflector plate can occur when the transport truck drives onto the loading ramp. For example, EP1120495A1 discloses a road paver with a transverse spreading auger and a screed. A channel plate is arranged in front of the transverse spreading auger in the direction of travel. The transverse spreading assembly and the channel plate can be adjusted in height by means of a height-adjustable support structure.

[0004] The object of the present invention is to reduce the segregation of the paving material upstream of the transverse distributor assembly and to reduce the contamination of the undercarriage by paving material. This object is achieved by a road paver according to claim 1 or a method for operating a road paver according to claim 13.

[0005] According to a first aspect of the invention, a road paver for producing a layer of paving material comprises a screed, a longitudinal conveying device, a transverse distributor arrangement, and a deflector plate arrangement. The longitudinal conveying device is designed to transport the paving material to the screed in the opposite direction of travel of the road paver. The transverse distributor arrangement is designed to distribute the paving material transversely to the direction of travel in front of the screed. The deflector plate arrangement is arranged in the direction of travel in front of the transverse distributor arrangement and includes a height-adjustable deflector plate. The longitudinal conveying device, the transverse distributor arrangement, and the deflector plate arrangement are arranged such that, during operation of the road paver, the paving material is guided over the deflector plate arrangement on its way to the transverse distributor arrangement.

[0006] The height-adjustable deflector plate can be designed to be adjustable in its vertical position. The height-adjustable deflector plate can be designed to be adjustable in its vertical position relative to the longitudinal conveyor device. The height-adjustable deflector plate can be designed to be adjustable in its vertical position relative to the transverse distributor assembly.

[0007] The height-adjustable deflector plate can be designed to be movable in height. The height-adjustable deflector plate can be designed to be movable in height relative to the longitudinal conveyor device. The height-adjustable deflector plate can be designed to be movable in height relative to the transverse distributor arrangement.

[0008] The height-adjustable deflector plate allows the vertical distance between the deflector plate assembly and the substrate to be varied or adjusted. A small vertical distance between the deflector plate assembly and the substrate reduces the amount of paving material entering the longitudinal conveyor and / or the asphalt paver's chassis. This helps prevent segregation of the paving material.

[0009] The term "height-adjustable" is to be understood, in particular in the present application, as meaning that the vertical position is adjustable.

[0010] The height-adjustable deflector plate can be designed to be infinitely adjustable in height. The height-adjustable deflector plate can be designed to be infinitely movable in height. The height-adjustable deflector plate can be designed to be infinitely adjustable in the vertical position. The height-adjustable deflector plate can be designed to be infinitely movable in the vertical position.

[0011] The screed can have a base screed. The screed can have laterally extendable extension sections, which are arranged, in particular, to the side of the base screed. Looking in the direction of travel, the extension sections can be arranged to the left and right of the base screed.

[0012] The height-adjustable deflector plate can be moved at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters. The height-adjustable deflector plate can be moved at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters, relative to the transverse distributor arrangement. The height-adjustable deflector plate can be moved at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters, relative to the longitudinal conveyor device. The height-adjustable deflector plate can be moved at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters, relative to the surface.

[0013] The deflector plate arrangement can have a width between 42 centimeters and 172 centimeters, preferably between 42 centimeters and 62 centimeters. The deflector plate arrangement can have a width between 60 centimeters and 80 centimeters. The deflector plate arrangement can have a width between 70 centimeters and 90 centimeters. The deflector plate arrangement can have a width between 115 centimeters and 135 centimeters. The deflector plate arrangement can have a width between 130 centimeters and 150 centimeters. The deflector plate arrangement can have a width between 152 centimeters and 172 centimeters. The width of the deflector plate arrangement can correspond to the width of the installation screed. The width of the deflector plate arrangement can correspond to the width of the base screed. The width of the deflector plate arrangement can correspond to the combined width of the base screed and the extension sections.The width of the deflector plate arrangement can correspond to the width of a cross-distribution channel or tunnel of the road paver. The width is specifically defined as its extent perpendicular to the direction of travel.

[0014] The height-adjustable deflector plate can have a width between 42 centimeters and 315 centimeters, preferably between 42 centimeters and 62 centimeters. The height-adjustable deflector plate can have a width between 70 centimeters and 90 centimeters. The height-adjustable deflector plate can have a width between 115 centimeters and 135 centimeters. The height-adjustable deflector plate can have a width between 130 centimeters and 150 centimeters. The height-adjustable deflector plate can have a width between 152 centimeters and 172 centimeters. The height-adjustable deflector plate can have a width between 110 centimeters and 130 centimeters. The height-adjustable deflector plate can have a width between 170 centimeters and 190 centimeters. The height-adjustable deflector plate can have a width between 230 centimeters and 260 centimeters. The height-adjustable deflector plate can have a width between 290 centimeters and 315 centimeters.The deflector plate arrangement can include several height-adjustable deflectors. The sum of the widths of the height-adjustable deflectors can be the values ​​mentioned above. The deflectors can be arranged side by side, transverse to the direction of travel of the paver, and in particular, adjacent to one another. The deflectors can be offset from each other in the direction of travel. The deflectors can be aligned with each other in the direction of travel. The width of the height-adjustable deflector plate can correspond to the width of the screed. The width of the height-adjustable deflector plate can correspond to the width of the base screed. The width of the height-adjustable deflector plate can correspond to the combined width of the base screed and the extension sections. The width of the height-adjustable deflector plate can correspond to the width of a transverse distribution channel or tunnel of the paver.

[0015] The longitudinal conveyor is positioned in front of the screed in the direction of travel. The transverse distributor is also positioned in front of the screed in the direction of travel. The transverse distributor is positioned downstream of the longitudinal conveyor in the direction of travel. The paver may also have a material hopper for receiving the paving material. The material hopper is positioned in front of the longitudinal conveyor in the direction of travel.

[0016] The road paver may have a chassis. The chassis may be arranged laterally to the longitudinal conveyor. The chassis may comprise a left-hand chassis and a right-hand chassis. Left and right refer to the direction of travel of the road paver. The left-hand chassis may be arranged laterally to the left of the longitudinal conveyor. The right-hand chassis may be arranged laterally to the right of the longitudinal conveyor. The chassis, in particular the left-hand and right-hand chassis, may be a tracked chassis. The chassis, in particular the left-hand and right-hand chassis, may include wheels.

[0017] The deflector plate arrangement can extend transversely to the direction of travel, particularly to the left and right, beyond the longitudinal conveyor device. The deflector plate arrangement can extend transversely to the direction of travel into the chassis. The deflector plate arrangement can be located behind the chassis in the direction of travel. The deflector plate arrangement can extend transversely to the direction of travel from a left lateral end to a right lateral end of the chassis. The deflector plate arrangement can extend transversely to the direction of travel from an outer side of the left chassis to an outer side of the right chassis.

[0018] The height-adjustable deflector plate can extend transversely to the direction of travel, particularly to the left and right, beyond the longitudinal conveyor device. The height-adjustable deflector plate can extend transversely to the direction of travel into the chassis. The height-adjustable deflector plate can be positioned behind the chassis in the direction of travel. The height-adjustable deflector plate can extend transversely to the direction of travel from a left lateral end to a right lateral end of the chassis. The height-adjustable deflector plate can extend transversely to the direction of travel from an outer side of the left chassis to an outer side of the right chassis.

[0019] The height-adjustable deflector plate can be moved vertically during operation of the asphalt paver (especially during a paving pass), particularly relative to the longitudinal conveyor. The vertical position of the height-adjustable deflector plate can also be adjusted during operation of the asphalt paver, particularly relative to the longitudinal conveyor. In particular, the deflector plate arrangement can be designed so that the height-adjustable deflector plate can be lowered and raised during operation of the asphalt paver, particularly relative to the longitudinal conveyor.

[0020] The height-adjustable deflector plate can be attached, at least indirectly, to a suspension of the cross-distribution assembly. The height-adjustable deflector plate can be attached to the suspension of the cross-distribution assembly via an intermediate piece, for example, a support structure. The height-adjustable deflector plate can be attached directly to the suspension of the cross-distribution assembly. The suspension of the cross-distribution assembly and the height-adjustable deflector plate can be attached to the same component. The suspension of the cross-distribution assembly can be attached to a cross-distribution bracket. The height-adjustable deflector plate can also be attached to the cross-distribution bracket.

[0021] The height-adjustable deflector plate can be moved vertically together with the transverse distribution arrangement, particularly relative to the longitudinal conveyor. The transverse distribution arrangement can be moved vertically, particularly relative to the longitudinal conveyor. The height-adjustable deflector plate can be attached to the transverse distribution arrangement, at least indirectly, thereby allowing the height-adjustable deflector plate to move vertically together with the transverse distribution arrangement, particularly relative to the longitudinal conveyor. The suspension of the transverse distribution arrangement can be moved vertically, particularly relative to the longitudinal conveyor. The transverse distributor bracket can be moved vertically, particularly relative to the longitudinal conveyor. The vertical position of the height-adjustable deflector plate and the vertical position of the transverse distribution arrangement can be adjusted together, particularly relative to the longitudinal conveyor.

[0022] The cross-spreader bracket or the suspension of the cross-spreader assembly can be attached to the asphalt paver chassis via cylinders. The vertical position of the cross-spreader bracket, the suspension of the cross-spreader assembly, the height-adjustable deflector plate, and / or the cross-spreader assembly can be adjusted via the cylinders. The cylinders can be pneumatic, hydraulic, or electric.

[0023] The height-adjustable deflector plate can be moved vertically relative to the transverse distribution arrangement. An adjustment mechanism, located between the height-adjustable deflector plate and the suspension of the transverse distribution arrangement, can be configured to move the height-adjustable deflector plate vertically relative to the transverse distribution arrangement. The adjustment mechanism can include at least one pneumatic, hydraulic, or electric cylinder. The adjustment mechanism can also include an electric motor.

[0024] The vertical position of the height-adjustable deflector plate can be adjusted relative to the vertical position of the cross-distribution assembly. The vertical position of the height-adjustable deflector plate can be adjusted relative to the vertical position of the cross-distribution bracket.

[0025] The deflector plate assembly is essentially located between the longitudinal conveyor and the transverse distribution assembly. The adjustable deflector plate is essentially located between the longitudinal conveyor and the transverse distribution assembly. The term "essentially" is to be interpreted in such a way that areas of the individual components may overlap. The center of gravity of the deflector plate assembly may be located between the center of gravity of the longitudinal conveyor and the center of gravity of the transverse distribution assembly. The center of gravity of the height-adjustable deflector plate may be located between the center of gravity of the longitudinal conveyor and the center of gravity of the transverse distribution assembly.

[0026] The paving material is transported by the longitudinal conveyor against the direction of travel of the paver to the transverse distribution unit. On its way to the transverse distribution unit, the paving material is guided over the deflector plate assembly. Specifically, the paving material falls from the longitudinal conveyor onto the deflector plate assembly, which directs the paving material to the transverse distribution unit.

[0027] The height-adjustable deflector plate can be pneumatically, hydraulically, electrically, or mechanically adjustable. The wiper assembly can include one or more pneumatic cylinders, one or more hydraulic cylinders, one or more electric motors, or one or more cranks or ratchets. The vertical position of the height-adjustable deflector plate can be pneumatically, hydraulically, electrically, and / or mechanically adjustable.

[0028] The deflector plate assembly can include a second deflector plate. The second deflector plate can be arranged and / or designed such that its height is not adjustable, particularly relative to the longitudinal conveyor. The second deflector plate can be arranged and / or designed such that its vertical position is not adjustable, particularly relative to the longitudinal conveyor. The deflector plate assembly can be designed such that the second deflector plate is not adjustable in height. The deflector plate assembly can be designed such that the vertical position of the second deflector plate is not adjustable.

[0029] The second deflector plate can be positioned in the direction of travel in front of the height-adjustable deflector plate. The second deflector plate can be positioned essentially between the longitudinal conveyor and the height-adjustable deflector plate. The second deflector plate can be positioned below the rear end of the longitudinal conveyor.

[0030] The second deflector plate can also be height-adjustable. The deflector plate arrangement can be designed such that the second deflector plate is height-adjustable, particularly relative to the longitudinal conveyor. The deflector plate arrangement can be designed such that the vertical position of the second deflector plate, particularly relative to the longitudinal conveyor, is adjustable.

[0031] The deflector plate assembly can include a comb-shaped or grid-shaped plate. The comb-shaped or grid-shaped plate can be adjustable in height, particularly relative to the longitudinal conveyor. The comb-shaped or grid-shaped plate can be arranged in the direction of travel upstream of the transverse distributor assembly. The comb-shaped or grid-shaped plate can be arranged in the direction of travel upstream of the height-adjustable deflector plate. The comb-shaped or grid-shaped plate can be arranged between the height-adjustable deflector plate and the longitudinal conveyor.

[0032] The vertical position of the comb- or grid-shaped plate can be adjustable. The deflector plate arrangement can be designed such that the vertical position of the comb- or grid-shaped plate, in particular relative to the longitudinal conveying device, is adjustable.

[0033] The asphalt paver may have a material hopper for receiving the paving material. The longitudinal conveying device may be designed to transport the paving material from the material hopper to the screed. In particular, the paving material may be conveyed by the longitudinal conveying device from the material hopper to the screed against the direction of travel. The longitudinal conveying device may be designed to transport the paving material from the material hopper to the transverse distributor. The transverse distributor may be designed to distribute the paving material in front of the screed, transverse to the direction of travel.

[0034] The asphalt paver may have a control unit. The control unit may be configured to adjust the height of the adjustable deflector plate, particularly relative to the longitudinal conveyor. The control unit may be configured to adjust the height of the adjustable deflector plate relative to the transverse distributor assembly. The control unit may be configured to adjust the height of the comb- or grid-shaped plate, particularly relative to the longitudinal conveyor. The control unit may be configured to adjust the height of the comb- or grid-shaped plate relative to the transverse distributor assembly. The control unit may be designed to allow stepless height adjustment of the adjustable deflector plate. The control unit may be designed to allow stepless height adjustment of the comb- or grid-shaped plate.

[0035] The control unit can be configured to adjust the vertical position of the height-adjustable deflector plate, particularly relative to the longitudinal conveyor. The control unit can be configured to adjust the vertical position of the height-adjustable deflector plate relative to the transverse distributor assembly. The control unit can be configured to continuously adjust the vertical position of the height-adjustable deflector plate. The control unit can be configured to continuously adjust the vertical position of the comb- or grid-shaped plate.

[0036] The control unit can be configured to adjust the vertical position of the comb- or grid-shaped plate together with the vertical position of the height-adjustable deflector plate.

[0037] The comb- or grid-shaped plate can be moved vertically together with the height-adjustable plate. The comb- or grid-shaped plate can be moved vertically relative to the height-adjustable deflector plate.

[0038] The road paver may have a pre-scraper assembly. The pre-scraper assembly may be located behind the cross-distributor assembly in the direction of travel. The pre-scraper assembly may include a height-adjustable scraper plate.

[0039] According to a second aspect of the invention, a method for operating a road paver comprises conveying paving material against the direction of travel of the road paver in front of a screed and distributing the paving material in front of the screed transversely to the direction of travel of the road paver by means of a transverse distributor arrangement. The road paver has a deflector plate. The deflector plate is arranged in the direction of travel in front of the transverse distributor arrangement. The deflector plate is movable vertically during operation of the road paver. The deflector plate can be movable together with the transverse distributor arrangement during operation of the road paver. The deflector plate can be movable vertically relative to the transverse distributor arrangement during operation of the road paver (in particular during a paving pass). The paving material is guided over the deflector plate on its way to the transverse distributor arrangement.

[0040] The deflector plate can be automatically adjusted in height by a control unit. The deflector plate can be adjusted in height by operator input. The vertical position of the deflector plate can be automatically controlled by a control unit. The vertical position of the deflector plate can be controlled by operator input.

[0041] The vertical position of the deflector plate can be adjusted based on the current operating mode of the paver. The height of the deflector plate can also be adjusted based on the current operating mode of the paver.

[0042] The road paver according to the first aspect of the invention can be used with process steps of the method according to the second aspect of the invention. The method according to the second aspect of the invention can be carried out with a road paver according to the first aspect of the invention.

[0043] As used in the description of the various described embodiments and the attached claims, the singular forms are to be understood as also including the plural forms and vice versa, unless the context clearly indicates otherwise.

[0044] The terms "first," "second," "third," and "fourth" are simply to be understood as designations for a specific element or component and do not necessarily indicate a particular order or arrangement of the components or elements mentioned. For example, the presence of a fourth element / component does not necessarily imply the presence of a first, second, or third element / component, and vice versa.

[0045] Advantageous embodiments of the invention are explained in more detail below with reference to the accompanying figures. Fig. 1shows a side view of a road paver according to the invention. Fig. 2 shows a perspective view of a road paver according to the invention. Fig. 3 shows a top view of the longitudinal conveying device, the transverse distributor arrangement and the paving screed of a road paver according to the invention. Fig. 4 shows a perspective view of the longitudinal conveying device, the transverse distributor arrangement and the deflector plate arrangement of a road paver according to the invention. Fig. 5 shows a perspective view of the longitudinal conveying device and the deflector plate arrangement of a road paver according to the invention. Fig. 6 shows a perspective view of the longitudinal conveying device and the deflector plate arrangement of a road paver according to the invention. Fig. 7 shows a lateral sectional view of the longitudinal conveying device and the deflector plate arrangement of a road paver according to the invention. Fig. 8shows a lateral sectional view of the longitudinal conveying device and the deflector plate arrangement of a road paver according to the invention.

[0046] The Figs. 1 and 2Figure 1 shows a side view and a perspective top view of a road paver 1 according to the invention for producing a paving layer 2 on a substrate 3. The road paver 1 has a material hopper 4 at the front in the paving direction 100, from which, contrary to the paving direction 100 of the road paver 1, paving material 6 is transported by means of a longitudinal conveyor 5 to a screed 7 of the road paver 1. The longitudinal conveyor 5 is arranged within a chassis 8 of the road paver 1 and initially transports the paving material 6 to a transverse distributor 9 located in front of the screed 7 in the paving direction 100. The transverse distributor 9 is designed to distribute the paving material 6 in front of the screed 7 along a transverse direction 200 perpendicular to the paving direction 100.

[0047] The transverse extent of the installed layer 2 200 is referred to as the working width 210 or installation width 210. The screed 7 has a screed body 10 and laterally extendable extension sections 11. By extending the extension sections 11 laterally, the working width 210 of the layer 2 can be varied and adjusted.

[0048] The road paver 1 also has a control unit 33. The control unit 33 can be operated manually or automatically. The control unit 33 is designed to set the vertical position of a height-adjustable deflector plate 26. The control unit 33 is designed to move the height-adjustable deflector plate 26 vertically.

[0049] Fig. 3Figure 1 shows a schematic top view of the screed 7 and the longitudinal conveying device 5 of the road paver 1 according to the invention. The longitudinal conveying device 5 has a conveyor belt in the form of a scraper belt 12. The scraper belt 12 comprises a left scraper belt section 13a and a right scraper belt section 13b. The terms "left" and "right" are to be understood as viewed in the direction of paving travel 100.

[0050] The installation material 6, which is thrown off by means of the scraper belt 12 in front of the plank body 10 of the installation plank 7, is distributed along a front side 14 of the plank body 10 by means of the transverse distributor arrangement 9, as shown by arrows 220.

[0051] A rear wall 15 of the chassis 8 of the road paver 1 together with the front 14 of the plank base body 10 forms a transverse distribution channel 16 for the transverse distribution arrangement 9.

[0052] The extension sections 11 of the screed 7 can be extended laterally in a transverse direction 200° relative to the base screed 10, thereby widening the screed 7 and varying the working width 210°. The transverse distribution channel 16 can be extended further laterally in accordance with the widening of the screed 7.

[0053] The material 6 is transferred from the scraper conveyor 12 of the longitudinal conveying device 5 to the transverse distributor assembly 9, which is positioned in front of the paving screed 7. The transverse distributor assembly 9 is designed to distribute the material 6 in the transverse direction 200 in front of the paving screed 7, perpendicular to the paving direction 100, within the transverse distributor channel 16.

[0054] The transverse distributor assembly 9 is attached to the rear end of the chassis 8 of the road paver 1. The transverse distributor assembly 9 comprises a left distributor auger 17 and a right distributor auger 18. The left distributor auger 17 and the right distributor auger 18 are mounted on a suspension 19 in the form of an auger suspension 19.

[0055] The housing formed by the screw suspension 19 contains a screw drive (not shown) for driving the two distribution screws 17, 18. The transverse distribution arrangement 9 comprises a shaft 20. This can be two separate shafts 20 (left shaft 21, right shaft 22) or a common shaft 20 for the two distribution screws 17, 18. The left distribution screw 17 is detachably coupled to the left shaft 21. The right distribution screw 18 is detachably coupled to the right shaft 22. The outer end of each shaft 21, 22, i.e., the end facing away from the screw suspension 19, is supported in a screw bearing 23.

[0056] The deflector plate arrangement 24 according to the invention is in Fig. 3 Not shown. The position of the deflector plate arrangement 24 is indicated by the reference numeral 24.

[0057] Fig. 4Figure 1 shows a perspective view of the longitudinal conveying device 5, the transverse distributor assembly 9, and the deflector plate assembly 24 of a road paver according to the invention. The deflector plate assembly 24 is arranged between the longitudinal conveying device 5 and the transverse distributor assembly 9.

[0058] In order to better illustrate the individual components of the longitudinal conveyor device 5 and the deflector plate arrangement 24, the following is shown in Fig. 4 Only a part of the cross-distributor arrangement 9 is shown. Fig. 4 The right-hand distributor screw 18, the right-hand shaft 22, and the screw suspension 19 of the transverse distributor assembly 9 are shown. The screw suspension 19 is mounted on the transverse distributor bracket 25.

[0059] The deflector plate assembly 24 comprises a height-adjustable deflector plate 26. The height-adjustable deflector plate 26 is connected to the cross-distributor bracket 25 via a support structure 27. The cross-distributor bracket 25 can be moved vertically to adjust the vertical position of the cross-distributor assembly 9. Due to the connection via the support structure 27, the height-adjustable deflector plate 26 moves vertically together with the cross-distributor assembly 9. In alternative embodiments, the height-adjustable deflector plate 26 can be moved vertically independently of the cross-distributor assembly 9. The upper surface 28 of the height-adjustable deflector plate 26 is arranged at an angle to the vertical 30° so that the installation material is guided to the cross-distributor assembly 9.

[0060] The deflector plate arrangement 24 further comprises a comb-like plate 29. The comb- or grid-shaped plate 29 is positioned between the longitudinal conveyor device 5 and the height-adjustable deflector plate 26. The comb-shaped plate is preferably made of spring steel so that it can deflect upon contact with the conveyor chain of the longitudinal conveyor without being damaged.

[0061] The deflector plate arrangement 24, in particular the height-adjustable deflector plate 26, reduces the entry of paving material 6 under the longitudinal conveyor 5. The deflector plate arrangement 24, in particular the height-adjustable deflector plate 26, reduces the conveyance of paving material 6 away from the transverse distributor arrangement 9 in the paving direction 100. The deflector plate arrangement, in particular the height-adjustable deflector plate 26, can reduce the carryover of paving material 6 by scraper bars of the empty run 30 of the scraper belt 12 in the paving direction 100. This can be further reduced by the comb- or grid-shaped plate 29. The chassis 31 of the asphalt paver 1 is arranged on either side of the longitudinal conveyor 5. The deflector plate arrangement 24, in particular the height-adjustable deflector plate 26, reduces the entry of paving material 6 into or under the chassis 31.

[0062] The Figs. 5 and 6 show perspective views of the in Fig. 4 The longitudinal conveyor device 5 and deflector plate arrangement 24 are shown. The transverse distributor arrangement 9 is omitted for clarity in the Figs. 5 and 6 not shown.

[0063] The in the Figs. 5 and 6 The deflector plate arrangement 24 shown additionally includes a second deflector plate 32. The second deflector plate 32 is located in the Fig. 4 The second deflector plate 32 is obscured by other components of the asphalt paver 1 as shown in the illustration. It is fixed and connected to the chassis 8 of the asphalt paver 1 or to the longitudinal conveyor 5. Therefore, the second deflector plate 32 is not vertically adjustable. It can also be omitted, as the height-adjustable deflector plate 24 largely or completely takes over its function.

[0064] Fig. 5 The height-adjustable deflector plate 26 is shown in a raised position. Fig. 6Figure 1 shows the height-adjustable deflector plate 26 in a lowered position. The comb- or grid-shaped plate 29 is connected to the height-adjustable deflector plate 26 and can be moved vertically together with the height-adjustable deflector plate 26.

[0065] The Figs. 7 and 8 show side views of the in the Figs. 5 and 6 longitudinal conveyor device 5 and deflector plate arrangement 24 shown. Fig. 7Figure 1 shows the height-adjustable deflector plate 26 and the comb- or grid-shaped plate 29 in a raised position. When the road paver 1 drives onto a transport truck via a loading ramp, a certain ground clearance or an approach angle of 40° below the deflector plate assembly 24 must be ensured. Otherwise, the deflector plate assembly 24 could come into contact with the ground 3 when driving onto the loading ramp, which could damage the deflector plate assembly 24. Moving the height-adjustable deflector plate 26 into the raised position enables a sufficiently large approach angle of 40°.

[0066] Fig. 8Figure 1 shows the height-adjustable deflector plate 26 and the comb- or grid-shaped plate 29 in a lowered position. During the installation of the paving material 6, it can be advantageous to limit the vertical distance, also referred to as height in this application, between the deflector plate arrangement 24 and the substrate 3. A small vertical distance 310 between the deflector plate arrangement 24 and the substrate 3 can reduce the amount of paving material 6 getting under the longitudinal conveying device 5 and / or the chassis 31. In the lowered position, the height-adjustable deflector plate 26 is arranged at a first vertical distance 310 from the substrate 3. The fixed, second deflector plate 32 is arranged at a second vertical distance 320 from the substrate 3. Only road pavers 1 with the fixed deflector plate 32 are known from the prior art.Due to the height difference 330 between the first vertical distance 310 and the second vertical distance 320, which is achieved by the height-adjustable deflector plate 26, the entry of installation material 6 under the longitudinal conveyor device 5 and the chassis 31 can be reduced.

Claims

1. A road paver (1) for producing a paving layer (2) from a paving material (6), comprising a paving screed (7), a longitudinal conveyor (5) configured to transport the paving material (6) against a direction of travel (100) of the road paver (1) toward the paving screed (7), a transverse distributor assembly (9) configured to distribute the paving material (6) transversely to the direction of travel (100) in front of the paving screed (7), and a deflector plate assembly (24) arranged in the direction of travel (100) in front of the transverse distributor assembly (9), characterized in that the deflector plate assembly (24) comprises a height-adjustable deflector plate (26), and the longitudinal conveyor (5), the transverse distributor assembly (9), and the deflector plate assembly (24) are arranged such that, during operation of the road paver (1), the paving material (6) can be guided over the deflector plate assembly (24) on its way from the longitudinal conveyor (5) against the direction of travel of the road paver (1) to the transverse distributor assembly (9).

2. The road paver according to claim 1, characterized in that the height-adjustable deflector plate (25) is movable in height during operation of the paver (1), in particular during a paving run of the paver.

3. The road paver according to claim 1 or 2, characterized in that the height-adjustable deflector plate (26) is attached, at least indirectly, to a suspension (19) of the transverse distributor assembly (9).

4. The road paver according to any one of the preceding claims, characterized in that the height-adjustable deflector plate (26) is movable in height together with the transverse distributor assembly (9).

5. The road paver according to any one of the preceding claims, characterized in that the height-adjustable deflector plate (26) is movable in height relative to the transverse distributor assembly (9).

6. The road paver according to any one of the preceding claims, characterized in that the deflector plate assembly (24) is arranged substantially between the longitudinal conveyor (5) and the transverse distributor assembly (9).

7. The road paver according to any one of the preceding claims, characterized in that the height-adjustable deflector plate (26) is pneumatically, hydraulically, electrically, and / or mechanically adjustable in height.

8. The road paver according to any one of the preceding claims, characterized in that the deflector plate assembly (24) comprises a second deflector plate (32), wherein the second deflector plate (32) is not height-adjustable, wherein the second deflector plate (32) is arranged, in particular, in the direction of travel (100) in front of the height-adjustable deflector plate (26).

9. The road paver according to any of the preceding claims, characterized in that the deflector plate assembly (24) additionally comprises a comb- or grid-shaped plate (29), wherein the comb- or grid-shaped plate (29) is height-adjustable.

10. The road paver according to any one of the preceding claims, characterized in that the road paver (1) comprises a material hopper (4) for receiving the paving material (6), wherein the longitudinal conveyor (5) is configured to transport the paving material (6) from the material hopper (4) to the paving screed (7), in particular to the transverse distributor assembly (9) in front of the paving screed (7).

11. The road paver according to any one of the preceding claims, characterized in that the road paver (1) comprises a control unit (33), wherein the control unit (33) is configured to adjust the height of the height-adjustable deflector plate (26).

12. The road paver according to any one of the preceding claims, characterized in that the road paver (1) comprises a pre-screeder assembly, wherein the pre-screeder assembly is arranged in the direction of travel (100) behind the transverse distributor assembly (9).

13. A method for operating a road paver according to any one of the preceding claims, wherein the method comprises: - conveying paving material (6) against a direction of travel (100) of the road paver (1) in front of a paving screed (7) of the road paver (1), and - distributing the paving material (6) in front of the paving screed (7) transversely to the direction of travel (100) of the road paver (1) by means of a transverse distributor assembly (9), wherein the road paver (1) comprises a deflector plate (26) arranged in the direction of travel (100) in front of the transverse distributor assembly (9), characterized in that the deflector plate (26) is moved vertically during operation of the road paver (1), in particular during a paving pass of the road paver, and the paving material (6) is guided over the deflector plate (26) on its way to the transverse distribution assembly (9).

14. The method for operating a road paver according to claim 13, characterized in that the deflector plate (26) is moved vertically automatically by a control unit (33) and / or by operator input.

15. The method for operating a road paver according to claim 13 or 14, characterized in that the vertical position of the deflector plate (26) is adjusted based on the current operating mode of the road paver (1).

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