Road paver with height adjusting deflector plate

Abstract

To provide a road paver that forms a paving layer from paving materials, and an operating method thereof.SOLUTION: A road paver includes a screed, a longitudinal conveying device (5) that is configured to convey paving materials to the screed in a direction opposite to the travel direction (100) of the road paver, a cross-direction distribution mechanism that is configured to distribute the paving materials transversely to the traveling direction (100) in front of the screed, and a deflector plate mechanism (24) that is arranged in front of the cross-direction distribution mechanism in the traveling direction (100). The deflector plate mechanism (24) has a height adjusting deflector plate (26).SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a road paver and a method of operating a road paver. [Background technology]

[0002] Road pavers are designed to form paving layers from paving materials such as asphalt and generally include a chassis and a working assembly disposed on the chassis, such as a material hopper, a screed, a longitudinal conveying device, and a cross-directional distribution mechanism.

[0003] Typically, a fixed deflector plate is positioned below the rear end of the longitudinal conveying device. During paving, as material is conveyed from the longitudinal conveying device to the cross-direction distribution mechanism, the material may accumulate in the direction of travel of the road paver. This material may accumulate in front of the cross-direction distribution mechanism, causing separation of the paving material and contamination of the drive gear. Fixed deflector plates known in the prior art may only be able to prevent this to a limited extent. Because of the need for sufficient ground clearance below the deflector plate or a sufficiently large entry angle for access to the transport truck, the deflector plate cannot be positioned vertically as low as required. If the deflector plate is not positioned high enough, it may interfere with access to the transport truck or may be damaged when the transport truck drives onto the loading ramp. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to reduce the separation of paving material ahead of the cross-direction distribution mechanism and to reduce contamination of the drive gear by paving material. This aim is achieved by a road paver as set forth in claim 1 or a method for operating a road paver as set forth in claim 13. [Means for solving the problem]

[0005] According to a first aspect of the present invention, a road paver for forming a paving layer of paving material comprises a screed, a longitudinal conveying device, a cross-direction distribution mechanism, and a deflector plate mechanism. The longitudinal conveying device is configured to convey paving material to the screed in a direction opposite to the direction of travel of the road paver. The cross-direction distribution mechanism is configured to distribute the paving material in a direction transverse to the direction of travel in front of the screed. The deflector plate mechanism is arranged in front of the cross-direction distribution mechanism in the direction of travel and has an adjustable deflector plate.

[0006] The height adjustable deflector plate may be configured to be adjustable in its vertical position. The height adjustable deflector plate may be configured to be adjustable in its vertical position relative to the longitudinal conveying device. The height adjustable deflector plate may be configured to be adjustable in its vertical position relative to the cross-direction distribution mechanism.

[0007] The height adjustable deflector plate may be configured to be movable in a height direction. The height adjustable deflector plate may be configured to be movable in a height direction relative to the longitudinal conveying device. The height adjustable deflector plate may be configured to be movable in a height direction relative to the cross direction distribution mechanism.

[0008] The adjustable deflector plate allows for the vertical distance between the deflector plate mechanism and the substrate to be changed or adjusted. A small vertical distance between the deflector plate mechanism and the substrate can reduce the amount of paving material that enters below the longitudinal conveying device and / or the drive gear of the road paver, which can prevent the paving material from separating.

[0009] The term adjustable in particular should be understood in this application to mean that the vertical position is adjustable.

[0010] The height of the height adjustable deflector plate may be configured to be infinitely adjustable. The height adjustable deflector plate may be configured to be infinitely variable in height. The height adjustable deflector plate may be configured to be infinitely adjustable in vertical position. The height adjustable deflector plate may be configured to be infinitely movable in vertical position.

[0011] The screed may have a base screed. The screed may have laterally extendable extensions, in particular arranged on the sides of the base screed. The extensions may be arranged on the left and right sides of the base screed when viewed in the direction of travel.

[0012] The height adjustable deflector plate may be movable in the height direction by at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters. The height adjustable deflector plate may be movable in the height direction relative to the cross-direction distribution mechanism by at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters. The height adjustable deflector plate may be movable in the height direction relative to the longitudinal conveying device by at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters. The height of the height adjustable deflector plate may be movable in the height direction relative to the substrate by at least 40 millimeters, preferably at least 100 millimeters, preferably at least 150 millimeters, preferably at least 200 millimeters.

[0013] The deflector plate arrangement may have a width of 42 cm to 172 cm, preferably 42 cm to 62 cm. The deflector plate arrangement may have a width of 60 cm to 80 cm. The deflector plate arrangement may have a width of 70 cm to 90 cm. The deflector plate arrangement may have a width of 115 cm to 135 cm. The deflector plate arrangement may have a width of 130 cm to 150 cm. The deflector plate arrangement may have a width of 152 cm to 172 cm. The width of the deflector plate arrangement may correspond to the width of the screed. The width of the deflector plate arrangement may correspond to the width of the base screed. The width of the deflector plate arrangement may correspond to the combined width of the base screed and the extension. The width of the deflector plate arrangement may correspond to the width of a cross-direction distributor channel or tunnel of the road paver. The width is particularly defined as the extension cross-direction relative to the direction of travel.

[0014] The height adjustable deflector plate may have a width of 42 centimeters to 315 centimeters, preferably 42 centimeters to 62 centimeters. The height adjustable deflector plate may have a width of 70 centimeters to 90 centimeters. The height adjustable deflector plate may have a width of 115 centimeters to 135 centimeters. The height adjustable deflector plate may have a width of 130 centimeters to 150 centimeters. The height adjustable deflector plate may have a width of 152 centimeters to 172 centimeters. The height adjustable deflector plate may have a width of 110 centimeters to 130 centimeters. The height adjustable deflector plate may have a width of 170 centimeters to 190 centimeters. The height adjustable deflector plate may have a width of 230 centimeters to 260 centimeters. The height adjustable deflector plate may have a width of 290 centimeters to 315 centimeters. The deflector plate mechanism may have a number of height adjustable deflector plates. The sum of the widths of the height adjustable deflector plates may be as described above. The deflector plates may be arranged next to each other in a direction transverse to the travel direction of the road paver, in particular adjacent to each other. The deflector plates may be arranged offset from each other in the travel direction. The deflector plates may be arranged next to each other in the travel direction. The width of the height adjustable deflector plates may correspond to the width of the screed. The width of the height adjustable deflector plates may correspond to the width of the base screed. The width of the height adjustable deflector plates may correspond to the combined width of the base screed and the extension. The width of the height adjustable deflector plates may correspond to the width of a cross-direction distributor channel or tunnel of the road paver.

[0015] The longitudinal conveying device is arranged in front of the screed in the direction of travel. The cross-direction distribution mechanism is arranged in front of the screed in the direction of travel. The cross-direction distribution mechanism is arranged downstream of the longitudinal conveying device in the direction of travel. The road paver may also have a material hopper for storing paving material. The material hopper is arranged in front of the longitudinal conveying device in the direction of travel.

[0016] The road paver may have a drive gear. The drive gear may be arranged on a side of the longitudinal conveying device. The drive gear may comprise a left drive gear and a right drive gear. The left side and right side refer to the direction of travel of the road paver. The left drive gear may be arranged on the left side of the longitudinal conveying device. The right drive gear may be arranged on the right side of the longitudinal conveying device. The drive gears, in particular the left and right drive gears, may be caterpillar-type. The drive gears, in particular the left and right drive gears, may comprise wheels.

[0017] The deflector plate mechanism may extend transversely to the direction of travel, particularly to the left and right beyond the longitudinal conveying device. The deflector plate mechanism may extend transversely to the direction of travel into the drive gear. The deflector plate mechanism may be disposed rearward of the drive gear in the direction of travel. The deflector plate mechanism may extend transversely to the direction of travel from the left outer end to the right outer end of the drive gear. The deflector plate mechanism may extend transversely to the direction of travel from the outside of the left drive gear to the outside of the right drive gear.

[0018] The height-adjusting deflector plate may extend transversely to the direction of travel, in particular to the left and right beyond the longitudinal conveying device. The height-adjusting deflector plate may extend transversely to the direction of travel into the drive gear. The height-adjusting deflector plate may be arranged rearward of the drive gear in the direction of travel. The height-adjusting deflector plate may extend transversely to the direction of travel from the left outer end to the right outer end of the drive gear. The height-adjusting deflector plate may extend transversely to the direction of travel from the outside of the left drive gear to the outside of the right drive gear.

[0019] The height adjustable deflector plate may be movable in height during operation of the road paver (particularly during paving), in particular relative to the longitudinal transport device. The vertical position of the height adjustable deflector plate may be adjustable during operation of the road paver, in particular relative to the longitudinal transport device. In particular, the deflector plate mechanism may be configured such that the height adjustable deflector plate can be lowered and raised during operation of the road paver, in particular relative to the longitudinal transport device.

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

[0021] The height-adjustable deflector plate may be movable together with the cross-direction distribution mechanism, in particular in a height direction relative to the longitudinal conveying device. The cross-direction distribution mechanism may be movable together with the cross-direction distribution mechanism, in particular in a height direction relative to the longitudinal conveying device. The height-adjustable deflector plate may be at least indirectly attached to the cross-direction distribution mechanism, so that the height-adjustable deflector plate may be movable together with the cross-direction distribution mechanism, in particular in a height direction relative to the longitudinal conveying device. A suspension of the cross-direction distribution mechanism may be movable in a height direction, in particular in a height direction relative to the longitudinal conveying device. The cross-direction distribution bracket may be movable in a height direction, in particular in a height direction relative to the longitudinal conveying device. The vertical position of the height-adjustable deflector plate and the vertical position of the cross-direction distribution mechanism may be adjustable together, in particular in relation to the longitudinal conveying device.

[0022] The cross distribution bracket or cross distribution mechanism suspension may be attached to the road paver chassis via a cylinder. The vertical position of the cross distribution bracket, cross distribution mechanism suspension, height-adjustable deflector plate and / or cross distribution mechanism may be adjustable via the cylinder. The cylinder may be pneumatic, hydraulic, or electric.

[0023] The height adjustable deflector plate may be movable in height relative to the cross-direction distribution mechanism. An adjustment assembly disposed between the height adjustable deflector plate and a suspension of the cross-direction distribution mechanism may be configured to move the height adjustable deflector plate in height relative to the cross-direction distribution mechanism. The adjustment mechanism may include at least one pneumatic, hydraulic, or electric cylinder. The adjustment mechanism may include an electric motor.

[0024] The vertical position of the height adjustable deflector plate may be adjustable relative to the vertical position of the cross-direction distribution mechanism.The vertical position of the height adjustable deflector plate may be adjustable relative to the vertical position of the cross-direction distribution bracket.

[0025] The deflector plate arrangement may be arranged substantially, particularly in the direction of travel, between the longitudinal conveying device and the cross-direction distribution mechanism. The adjustable deflector plate may be arranged substantially, particularly in the direction of travel, between the longitudinal conveying device and the cross-direction distribution assembly. The term "substantially" should be interpreted in particular to mean that the areas of the individual components may overlap. The center of gravity of the deflector plate arrangement may be located between the center of gravity of the longitudinal conveying device and the center of gravity of the cross-direction distribution mechanism, particularly in the direction of travel. The center of gravity of the adjustable deflector plate may be located between the center of gravity of the longitudinal conveying device and the center of gravity of the cross-direction distribution assembly, particularly in the direction of travel.

[0026] The paving material may be conveyed from the longitudinal conveying device to the cross-direction distribution mechanism in a direction opposite to the direction of travel of the road paver. On its way to the cross-direction distribution mechanism, the paving material may be guided over a deflector plate mechanism. In particular, the paving material falls from the longitudinal conveying device onto the deflector plate mechanism, which guides the paving material to the cross-direction distribution mechanism.

[0027] The height adjustable deflector plate may be pneumatically movable in height. The height adjustable deflector plate may be hydraulically movable in height. The height adjustable deflector plate may be electrically movable in height. The height adjustable deflector plate may be mechanically movable in height. The scraper mechanism may have one or more pneumatic cylinders. The scraper mechanism may have one or more hydraulic cylinders. The scraper mechanism may have one or more electric motors. The scraper mechanism may have one or more cranks or ratchets. The vertical position of the height adjustable deflector plate may be pneumatically, hydraulically, electrically, and / or mechanically adjustable.

[0028] The deflector plate mechanism may have a second deflector plate. The second deflector plate may be arranged and / or configured such that it is not movable in a height direction, particularly relative to the longitudinal conveying device. The second deflector plate may be arranged and / or configured such that its vertical position is not adjustable, particularly relative to the longitudinal conveying device. The deflector plate mechanism may be configured such that the second deflector plate is not adjustable in a height direction. The deflector plate mechanism may be configured such that the vertical position of the second deflector plate is not adjustable.

[0029] The second deflector plate may be disposed in front of the height-adjustable deflector plate in the travel direction, the second deflector plate may be disposed substantially between the longitudinal conveying device and the height-adjustable deflector plate, or the second deflector plate may be disposed below the rear end of the longitudinal conveying device.

[0030] The second deflector plate is also configured to be height adjustable. The deflector plate mechanism may be configured such that the second deflector plate is height adjustable, particularly relative to the longitudinal conveying device. The deflector plate mechanism may be configured such that the vertical position of the second deflector plate is adjustable, particularly relative to the longitudinal conveying device.

[0031] The deflector plate mechanism may have a comb or grid plate. The comb or grid plate may be height-adjustable, particularly relative to the longitudinal conveying device. The comb or grid plate may be arranged in front of the cross-direction distribution mechanism in the running direction. The comb or grid plate may be arranged in front of the height-adjustable deflector plate in the running direction. The comb or grid plate may be arranged between the height-adjustable deflector plate and the longitudinal conveying device.

[0032] The vertical position of the comb or grid sheet may be adjustable. The deflector plate mechanism may be configured such that the vertical position of the comb or grid plate is adjustable, particularly relative to the longitudinal transport device.

[0033] The road paver may have a material hopper for receiving the paving material. The longitudinal conveying device may be configured to convey the paving material from the material hopper to the front of the screed. In particular, the paving material may be conveyed from the material hopper to the front of the screed in a direction opposite to the direction of travel by the longitudinal conveying device. The longitudinal conveying device may be configured to convey the paving material from the material hopper to a cross-direction distribution mechanism. The cross-direction distribution mechanism may be configured to distribute the paving material in a direction cross the direction of travel in front of the screed.

[0034] The road paver may have a control unit. The control unit may be configured to adjust the height of the adjustable deflector plate, particularly for the longitudinal conveying device. The control unit may be configured to adjust the height of the adjustable deflector plate for the cross-direction distribution mechanism. The control unit may be configured to adjust the height of the comb or grid plate, particularly for the longitudinal conveying device. The control unit may be configured to adjust the height of the comb or grid plate for the cross-direction distribution mechanism. The control unit may be configured to infinitely adjust the height of the adjustable deflector plate. The control unit may be configured to infinitely adjust the height of the comb or grid plate.

[0035] The control unit may be configured to adjust the vertical position of the height adjustable deflector plate, in particular relative to the longitudinal conveying device. The control unit may be configured to adjust the vertical position of the height adjustable deflector plate relative to the cross-direction distribution mechanism. The control unit may be configured to infinitely adjust the vertical position of the height adjustable deflector plate. The control unit may be configured to infinitely adjust the vertical position of the comb or grid plate.

[0036] The control may be configured to adjust the vertical position of the comb or grid plate together with the vertical position of the heightening deflector plate.

[0037] The comb or grid plate may be movable in height together with the height adjustable plate.The comb or grid plate may be movable in height relative to the height adjustable deflector plate.

[0038] The road paver may have a pre-scraper mechanism, which may be disposed behind the cross-direction distribution mechanism in the direction of travel, and which may have an adjustable scraper plate.

[0039] According to a second aspect of the present invention, a method for operating a road paver includes the steps of conveying paving material in front of a screed in a direction opposite to the direction of travel of the road paver, and distributing the paving material in front of the screed in a direction transverse to the direction of travel of the road paver by a cross-direction distribution mechanism. The road paver has a deflector plate. The deflector plate is arranged in front of the cross-direction distribution mechanism in the direction of travel. The deflector plate is movable in height during operation of the road paver. The deflector plate may be movable together with the cross-direction distribution mechanism during operation of the road paver. The deflector plate may be movable in height relative to the cross-direction distribution mechanism during operation of the road paver (particularly during paving).

[0040] The height of the deflector plate may be movable in height automatically by a controller. The deflector plate may be movable in height by operator input. The vertical position of the deflector plate may be controlled automatically by a controller. The vertical position of the deflector plate may be controlled by operator input.

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

[0042] A road paver according to the first aspect of the invention may be used in a method step of a method according to the second aspect of the invention. The method according to the second aspect of the invention may be carried out with a road paver according to the first aspect of the invention.

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

[0044] The designations "first," "second," "third," and "fourth" should be understood to be for the purpose of designating particular elements or components only, and do not necessarily indicate a particular order or sequence of assembly of said elements or components. For example, the presence of a fourth element / component does not necessarily imply the presence of the first, second, or third element / component, and vice versa.

[0045] Advantageous embodiments of the invention will now be explained in more detail with reference to the accompanying drawings. [Brief explanation of the drawings]

[0046] [Figure 1] FIG. 1 shows a side view of a road paver according to the present invention. [Figure 2] FIG. 2 shows a perspective view of a road paver according to the present invention. [Figure 3] FIG. 3 shows a top view of the longitudinal conveying device, cross-direction distribution mechanism and screed of a road paver according to the present invention. [Figure 4] FIG. 4 shows a perspective view of the longitudinal conveying device, cross-direction distribution mechanism and deflector plate mechanism of a road paver according to the present invention. [Figure 5] FIG. 5 shows a perspective view of the longitudinal transport device and deflector plate mechanism of the road paver according to the present invention. [Figure 6] FIG. 6 shows a perspective view of the longitudinal transport device and deflector plate mechanism of the road paver according to the present invention. [Figure 7] FIG. 7 shows a side cross-sectional view of a longitudinal transport device and deflector plate mechanism of a road paver according to the present invention. [Figure 8] FIG. 8 shows a side cross-sectional view of a longitudinal transport device and deflector plate mechanism of a road paver according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] 1 and 2 show a side view and a top perspective view of a road paver 1 according to the present invention for forming a paving layer 2 on a substrate 3. The road paver 1 has a material hopper 4 ahead of it in a paving direction 100, from which paving material 6 stored therein is transported by a longitudinal conveying device 5 in the direction opposite to the paving direction 100 of the road paver 1 to a screed 7 of the road paver 1. The longitudinal conveying device 5 is arranged on the chassis 8 of the road paver 1 and first transports the paving material 6 to a cross-direction distribution mechanism 9 arranged ahead of the screed 7 in the paving direction 100. The cross-direction distribution mechanism 9 is configured to distribute the paving material 6 ahead of the screed 7 along a cross direction 200 that is perpendicular to the paving direction 100.

[0048] The extension of the paving layer 2 in the cross direction 200 is called the working width 210 or paving width 210. The screed 7 has a screed base 10 and laterally extendable extensions 11. The working width 210 of the paving layer 2 can be changed and adjusted by extending the extensions 11 laterally.

[0049] The road paver 1 also has a control unit 33. The control unit 33 can be operated by user input or automatically. The control unit 33 is configured to adjust the vertical position of the height adjustable deflector plate 26. The control unit 33 is configured to move the height adjustable deflector plate 26.

[0050] 3 shows a schematic top view of the screed 7 and longitudinal conveying device 5 of a road paver 1 according to the invention. The longitudinal conveying device 5 comprises a conveyor belt in the form of a scraper belt 12. The scraper conveyor 12 comprises a left scraper conveyor section 13 and a right scraper conveyor section 14. The left and right designations should be understood when looking in the paving travel direction 100.

[0051] The paving material 6 dropped by the scraper belt 12 in front of the screed base 10 of the screed 7 is distributed along the front side 14 of the screed base 10 by the cross-direction distribution mechanism 9, as shown by arrow 220.

[0052] The rear wall 15 of the chassis 8 of the road paver 1 together with the front side 14 of the screed base body 10 form the cross distribution channel 16 of the cross distribution mechanism 9 .

[0053] The extensions 11 of the screed 7 can be extended laterally in the transverse direction 200 relative to the base screed 10, thereby making it possible to widen the screed 7 and change the working width 210. The transverse distributor channels 16 can be extended further laterally in response to the widening of the screed 7.

[0054] The paving material 6 is conveyed from the scraper belts 12 of the longitudinal conveying device 5 to a cross-direction distribution mechanism 9 located in front of the screed 7. The cross-direction distribution mechanism 9 is configured to distribute the paving material 6 in a cross-direction 200, which is transverse to the paving travel direction 100, in a cross-direction distribution channel 16 in front of the screed 7.

[0055] The cross-direction distribution mechanism 9 is mounted to the rear end of the chassis 8 of the road paver 1. The cross-direction distribution mechanism 9 comprises a left distribution auger 17 and a right distribution auger 18. The left distribution auger 17 and the right distribution auger 18 are supported on suspensions 19 in the form of auger suspensions 19.

[0056] The housing formed by the auger suspension 19 includes an auger drive (not shown) for driving the two distribution augers 17, 18. The cross-direction distribution mechanism 9 includes shafts 20, which may be two individual shafts 20 (left shaft 21, right shaft 22) or one shaft 20 shared by the two distribution augers 17, 18. The left distribution auger 17 is detachably connected to the left shaft 21. The right distributor auger 18 is detachably connected to the right shaft 22. The outer ends of each shaft 21, 22, i.e., the ends facing away from the auger suspension 19, are supported by auger bearings 23.

[0057] The deflector plate mechanism 24 according to the present invention is not shown in Figure 3. The position of the deflector plate mechanism 24 is indicated by the reference numeral 24.

[0058] 4 shows a perspective view of the longitudinal conveying device 5, the cross-direction distribution mechanism 9, and the deflector plate mechanism 24 of a road paver according to the present invention. The deflector plate mechanism 24 is disposed between the longitudinal conveying device 5 and the cross-direction distribution mechanism 9.

[0059] To better illustrate the individual components of the longitudinal conveying device 5 and the deflector plate mechanism 24, only a portion of the cross distribution mechanism 9 is shown in Figure 4. Figure 4 shows the right distribution auger 18, right shaft 22, and auger suspension 19 of the cross distribution mechanism 9. The auger suspension 19 is mounted on a cross distribution bracket 25.

[0060] Deflector plate mechanism 24 includes an adjustable deflector plate 26. Adjustable deflector plate 26 is connected to cross-direction distribution bracket 25 via support structure 27. Cross-direction distribution bracket 25 can be moved in height to adjust the vertical position of cross-direction distribution mechanism 9. Because of the connection via support structure 27, adjustable deflector plate 26 is thereby moved in height along with cross-direction distribution mechanism 9. In an alternative embodiment, adjustable deflector plate 26 can be moved in height independently of cross-direction distribution mechanism 9. An upper side 28 of adjustable deflector plate 26 is angled relative to vertical 300 to guide paving material into cross-direction distribution mechanism 9.

[0061] The deflector plate mechanism 24 further comprises a comb plate 29. The comb or grid plate 29 is disposed between the longitudinal conveying device 5 and the height-adjusting deflector plate 26. The comb plate is preferably made of spring steel so that it can avoid contact with the conveyor chain of the longitudinal conveyor without being damaged.

[0062] The deflector plate mechanism 24, in particular the adjustable deflector plates 26, reduces the intrusion of paving material 6 below the longitudinal conveying device 5. The deflector plate mechanism 24, in particular the adjustable deflector plates 26, reduces the conveyance of paving material 6 away from the cross-direction distribution mechanism 9 in the laying travel direction 100. The deflector plate mechanism, in particular the adjustable deflector plates 26, can reduce the entrapment of paving material 6 by the scraper bars of the empty strands 30 of the scraper belt 12 in the laying travel direction 100. This can be further reduced by comb or grid plates 29. Drive gears 31 of the road paver 1 are arranged on each side of the longitudinal conveying device 5. The deflector plate mechanism 24, in particular the adjustable deflector plates 26, reduces the intrusion of paving material 6 into or below the drive gears 31.

[0063] Figures 5 and 6 show perspective views of the longitudinal conveying device 5 and deflector plate mechanism 24 shown in Figure 4. For clarity, the cross-direction distribution mechanism 9 is not shown in Figures 5 and 6.

[0064] The deflector plate mechanism 24 shown in Figures 5 and 6 additionally includes a second deflector plate 32. In the illustration shown in Figure 4, the second deflector plate 32 is covered by other components of the road paver 1. The second deflector plate 32 is fixed and connected to the chassis 8 or the longitudinal conveying device 5 of the road paver 1. Therefore, the second deflector plate 32 is not movable in the height direction. Since the height-adjustable deflector plate 24 largely or completely replaces the function of the second deflector plate 32, the second deflector plate 32 may be omitted.

[0065] Figure 5 shows the height adjustable deflector plate 26 in a raised position. Figure 6 shows the height adjustable deflector plate 26 in a lowered position. A comb or grid plate 29 is connected to the height adjustable deflector plate 26 and can be moved in height together with the height adjustable deflector plate 26.

[0066] Figures 7 and 8 show side views of the longitudinal conveying device 5 and deflector plate mechanism 24 shown in Figures 5 and 6. Figure 7 shows the adjustable deflector plate 26 and comb or grid plate 29 in a raised position. When loading the road paver 1 onto the transport truck via the loading ramp, a certain substrate clearance or drive-on angle 400 must be maintained under the deflector plate mechanism 24. Otherwise, the deflector plate mechanism 24 may come into contact with the substrate 3 during loading onto the ramp, potentially damaging the deflector plate mechanism 24. By moving the adjustable deflector plate 26 to a raised position, a sufficiently large drive-on angle 400 can be achieved.

[0067] 8 shows the adjustable deflector plate 26 and the comb or grid plate 29 in the lowered position. During the laying of the paving material 6, it may be advantageous to limit the vertical distance, also referred to herein as height, between the deflector plate mechanism 24 and the substrate 3. A small vertical distance 310 between the deflector plate mechanism 24 and the substrate 3 may reduce intrusion of the paving material 6 below the longitudinal conveying device 5 and / or the drive gear 31. In the lowered position, the adjustable deflector plate 26 is positioned at a first vertical distance 310 from the substrate 3. The fixed second deflector plate 32 is positioned at a second vertical distance 320 from the substrate 3. Only road pavers 1 with fixed deflector plates 32 are known in the prior art. The height difference 330 between the first vertical distance 310 and the second vertical distance 320 achieved by the height-adjustable deflector plate 26 can reduce the intrusion of paving material 6 below the vertical conveying device 5 and drive gear 31.

Claims

1. A road paver (1) for forming a paving layer (2) from a paving material (6), comprising: Screed (7); a longitudinal conveying device (5) configured to convey the paving material (6) to the screed (7) in a direction opposite to the direction of travel (100) of the road paver (1); a cross-direction distribution mechanism (9) configured to distribute the paving material (6) in a direction crosswise to the direction of travel (100) in front of the screed (7); and a deflector plate mechanism (24) arranged in front of the cross-direction distribution mechanism (9) in the direction of travel (100); and wherein the deflector plate mechanism (24) has an adjustable deflector plate (26).

2. 2. The road paver according to claim 1, characterized in that the height-adjustable deflector plate (24) is movable in height during operation of the road paver (1), in particular during paving by the road paver.

3. 3. A road paver according to claim 1 or 2, characterized in that the height-adjustable deflector plate (26) is at least indirectly attached to a suspension (19) of the cross-direction distribution mechanism (9).

4. 4. A road paver according to claim 1, wherein the height-adjustable deflector plate (26) is height-movable together with the cross-direction distribution mechanism (9).

5. 5. A road paver according to any one of claims 1 to 4, characterized in that the height-adjustable deflector plate (26) is height-movable relative to the cross-direction distribution mechanism (9).

6. 6. A road paver according to any one of claims 1 to 5, characterized in that the deflector plate arrangement (24) is arranged substantially between the longitudinal conveying device (5) and the cross-direction distribution mechanism (9).

7. 7. A road paver according to claim 1, wherein the height-adjustable deflector plate (26) is movable in height pneumatically, hydraulically, electrically and / or mechanically.

8. 8. A road paver according to claim 1, wherein the deflector plate mechanism (24) has a second deflector plate (32), which is not height adjustable and which is arranged in particular in front of the height-adjustable deflector plate (26) in the direction of travel (100).

9. 9. A road paver according to claim 1, wherein the deflector plate arrangement (24) additionally comprises a comb or grid plate (29), the comb or grid plate (29) being adjustable in height.

10. 10. The road paver (1) according to any one of claims 1 to 9, characterized in that the road paver (1) has a material hopper (4) for receiving the paving material (6), and the longitudinal conveying device (5) is configured to convey the paving material (6) from the material hopper (4) to the screed (7), in particular to the cross-direction distribution mechanism (9) in front of the screed (7).

11. 11. The road paver according to claim 1, wherein the road paver (1) comprises a control unit (33), the control unit (33) being configured to adjust the height of the height adjustable deflector plate (26).

12. 12. The road paver according to claim 1, wherein the road paver (1) comprises a pre-scraper mechanism, which is arranged behind the cross-direction distribution mechanism (9) in the direction of travel (100).

13. A method for operating a road paver (1), in particular according to any one of claims 1 to 12, comprising the steps of: - conveying paving material (6) in front of the screed (7) of said road paver (1) in a direction opposite to the direction of travel (100) of said road paver (1); and - distributing the paving material (6) transversely to the direction of travel (100) of the road paver (1) by a transverse distribution mechanism (9) in front of the screed (7); the road paver (1) having a deflector plate (26) arranged in front of the cross-direction distribution mechanism (9) in the direction of travel (100), 10. A method for operating a road paver (1), characterized in that the deflector plate (26) is moved in height during operation of the road paver (1), in particular during the execution of paving by the road paver.

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

15. 15. A 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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