Channel sheet arrangement for a road paver and road paver

Abstract

Channel sheet arrangement (8) for a road paver having a chassis (1) with a channel sheet base section (9) which is arranged in the installation direction (R) in front of a transverse distributor (6) associated with a road paver screed, and wherein at least one channel sheet (10) can be pivotably connected laterally to the channel sheet base section (9) to extend an effective width of the channel sheet arrangement (8), characterized in that a releasably locking snap connection (12) is provided to secure against unintentional pivoting of the at least one channel sheet (10) relative to the chassis (1) in at least one detent position, comprising a projecting, spring-loaded detent hook (13) which can be guided to an undercut (16) for a detent position (17) by means of a guide jaw (14), which is received by a locking bracket (15) that can be fixed relative to the chassis (1).

Description

[0001] The invention relates to a channel plate arrangement for a road finisher according to the preamble of claim 1 and to a road finisher with a channel plate arrangement according to claim 14.

[0002] DE 200 01 246 U1 discloses a road paver with a chassis that has a supporting structure for a height-adjustable auger on the rear wall. Furthermore, channel plates are positioned between the auger and the chassis. To enable rapid height adjustments of the auger without time-consuming and laborious adjustments to the channel plates and / or supporting auxiliary devices, the channel plates are height-adjustable with the auger. This allows the channel plates to be optimally positioned in relation to the auger for the delivery of paving material, regardless of the auger's height setting.

[0003] Since extension sections are connected to the channel plates located on the supporting structure, handling is also significantly simplified. Making any adjustments in a time-saving manner improves the ability to increase a specific working width of the road paver using side-mounted screw conveyors. The corresponding screw conveyors or screw extensions are mounted with channel plates. Such channel plates are mounted in front of a corresponding screw shaft in the direction of travel on a screw conveyor frame section or directly on the chassis of the road paver. Together with a paving screed, they form a so-called auger trough.

[0004] The channel plate extension sections are modular, shorter and longer sheet metal edge sections that can be combined as required and directly secured to one another with end flanges, particularly by screwing. To prevent the channel plate extension sections from being pushed away in the direction of travel by the material feed and the transverse auger operating within them, and also to support the additional weight, counterpressure struts and lifting struts are installed. The counterpressure struts are usually supported directly on the extension sections, as described, for example, in EP 2 169 117 B1. If paving is carried out using only the base sheet width, the channel plates and the auger extensions are removed.

[0005] Since adjusting the working width of the screed also changes the width of the applied material, this can lead to excess material being applied in front of the auger in the direction of travel of the road paver using the screed. To prevent this, EP 3 988 714 A1 further discloses a method for easily adapting the effective width of the channel plate arrangement to the working width of a paving screed for the operator. For this purpose, an extension device comprising a first channel plate and a second channel plate that can be pivoted relative to it is provided on a channel plate base arrangement. The channel plate widening parts are preferably rigidly connected to the channel plate base arrangement, for example by means of screw connections.

[0006] The disadvantage of this is that while it does allow for the effective width of the channel plates to be adjusted, preventing unwanted material from being spread in the direction of travel of the paver in front of the auger, such a channel plate assembly must be dismantled for transporting the paver on a low-loader.

[0007] A road paver is transported from construction site to construction site on public roads without any widening parts (in the basic working width) on a low-loader with a width of 3 m (maximum transport width). In order to build roads with widths of approximately 3 m to 16 m, it is necessary, among other things, to widen the cross-distributing auger behind the road paver. This is done primarily using auger extensions and auger support plates, the so-called channel plates, which form a channel plate arrangement. The individual auger support plates are bolted to the road paver piece by piece, depending on the road width. Since road pavers are transported from construction site to construction site on low-loaders, it is necessary to attach and remove the auger extensions and the associated channel plate arrangement before and after use of the machine on the construction site to ensure that the maximum transport width is not exceeded.

[0008] The object of the invention is therefore to provide a channel plate arrangement and a road paver with which the effective width of the channel plate arrangement can be adapted to the working width of a (paving) screed in a manner that is simple for the operator, wherein the maximum transport width of the paver is not exceeded for transport on a low-loader.

[0009] This problem is solved by the features of claim 1 and 14 respectively.

[0010] This creates a road paver in which the channel plate arrangement no longer needs to be attached and removed for transport of the road paver. According to the invention, the channel plate arrangement can be designed with channel plates that can be attached to both sides of the paver and folded onto the paver. The maximum transport width of the paver is not exceeded and the folded channel plates are secured during transport by one or more snap fasteners. The respective snap fastener can engage one or more channel plates, for example, be screwed on. Corresponding locking positions serve to connect the channel plate(s) to the paver in the folded state, in such a way that they can be releasably connected so that the channel plates can be pivoted back into an unfolded state for the next use of the paver.The channel plate arrangement can be supported by horizontal (support) struts and / or at least one vertical (support) strut, which can also additionally secure the respective snap closure according to the invention. The respective locking position of the snap connection is releasable.

[0011] Another major advantage is that a pivotable linkage of flap-shaped channel plates can be achieved using hinges with one or more, especially two, pivot axes. With such a double hinge, each hinged channel plate can be locked in place in a rotationally secure manner. With a double hinge, each hinge forms a connecting element for the other, complementary for the unfolded and folded positions. The hinges can be designed as pivot bearings with one or more bearing eyes. The folding process of the channel plates can be carried out mechanically, with the aid of a hydraulic, or electrical device.

[0012] The support struts, which are connected to the channel plates, can be pivoted along with the paver when the channel plates are folded onto the respective paver. This provides additional stability for the channel plate assembly. By pivoting a support strut, it no longer needs to be removed for transporting the road paver on a low-loader. This applies in particular to a vertical support strut connected to the upper edge of a channel plate.

[0013] The combination of a pivoting (support) strut and a releasably locking snap connection provides strain relief that reduces the mechanical stress on the snap fastener in the locked position, in concert with the adjustment of the force required to lock / unlock the snap fastener. The snap connection is intended to be separable. Areas subject to high stress can also be designed with a more rigid design.

[0014] Further advantages and embodiments of the invention can be found in the following description and the subclaims.

[0015] The invention is explained in more detail below with reference to the embodiments shown in the attached figures. Fig. 1 shows a schematic view of a road paver with a folded-out channel plate arrangement, Fig. 2 shows schematically the Fig. 1 marked section in enlarged view, Fig. 3a to Fig. 3c show schematic views of a locking hook with guide jaw of a snap connection, Fig. 4 shows schematically the snap connection of a folded channel plate of the channel plate arrangement according to the invention, Fig. Figure 5 shows a schematic view of a road paver with folded channel plates secured by snap fasteners and with at least one vertical (support) strut.

[0016] The Fig. Figure 1 shows a road paver with a chassis 2 supported by a running gear 1, with at least one primary drive source, with a hydraulic system, and with a screed (not shown) articulated via drawbars. The road paver further comprises an asphalt supply arrangement with a storage hopper 5, a longitudinal conveyor 7 conveying material from the storage hopper 5 to a transverse auger 6, and a channel plate arrangement 8 arranged upright in front of the transverse auger 6 in the paving direction of travel R. This channel plate arrangement 8 has a channel plate base section 9.

[0017] This is a typical design for a road paver. The chassis 1 can be a crawler or wheeled chassis. The longitudinal conveyor device 7 preferably comprises two parallel conveyor belts to allow separate feeding of the right and left sections of the cross distributor. The cross distributor is designed here as a cross distributor auger 6.

[0018] The channel plate arrangement 8 is designed such that, at least in sections, foldable channel plates 10, 11 are provided as an extension of the channel plate base section 9 to the side of the channel plate base section 9 and opposite a position transverse to the installation travel direction R. For this purpose, the adjacent channel plates 10 are pivotally connected on one or both sides of the channel plate base section 9 by means of a folding mechanism, preferably in the form of one or more hinges 3.

[0019] A selectable number of channel plates 11 can be attached to the pivotably hinged channel plate 10 in order to achieve an extension of the channel plate arrangement 8 required for a desired installation width. The attachment can be achieved by plugging, screwing, etc., in particular mechanically and preferably rigidly.

[0020] The channel plates 10, 11 preferably form a whole for the pivot mechanism with an effective length to the axis in the pivot point of the hinges 3, as in Fig. 5. For transport of the road paver, for example on a low-loader (not shown), the folding mechanism enables a lateral positioning of the entirety of the respective channel plates 10, 11 relative to the chassis 1 of the road paver.

[0021] The entirety of the attached channel plates 10, 11 is thus folded over the pivoting channel plate 10, which is then arranged adjacent to the channel plate base section 9. This forms a pivoting component, which also creates a lateral cover element of the chassis 1 for the transport of the road paver on roads. Fig. As shown in Figure 5, the working width of the road paver is reduced to a transport width without the channel plate arrangement 8 having to be even partially dismantled.

[0022] Preferably, the respective hinge 3 is provided with a pivot axis parallel to a front side 4 of the channel plate 10 (cf. Fig. 1) in the area of ​​a corner edge of an end face of the foldable duct plate 10 serving as a connecting element, said end face facing the duct plate base section 9.

[0023] Preferably, the hinge(s) 3 are arranged vertically one above the other with two pivot pins in bearing eyes arranged at a distance from one another.

[0024] Fig. 1 further shows that the channel plate arrangement 8 comprises, laterally of the channel plate 10, extension sections in the form of channel plates 11, which can be rigidly connected to one another in order to be able to variably adjust the effective width of the channel plate arrangement 8 in the horizontal direction by means of removable extension channel plates 11, depending on an extension of the transverse distribution auger and a screed with screed extensions (not shown).

[0025] As described above, the invention relates to a channel plate arrangement 8 for a road paver having a chassis 1, comprising a channel plate base section 9 which is arranged in front of a transverse distributor (auger) 6 assigned to a road paver screed in the paving direction R. A channel plate 10 is pivotally connected laterally to the channel plate base section 9 on one or both sides to extend the effective width of the channel plate arrangement 8 for a specific paving width of the road paver by attaching additional channel plates 11. For transporting the road paver from one site to another, the channel plates 10, 11 are foldable and can be secured in this non-use state to avoid time-consuming removal of the individual channel plates 10, 11.

[0026] According to the invention, a releasably locking snap connection 12 is provided to secure against unintentional pivoting of the at least one channel plate 10 relative to the chassis 1 in at least one locking position ( Fig. 4). The snap connection 12 is assigned at least one counterpart for a snap closure, which is fixed to the chassis 1 or opposite the chassis 1. For this purpose, as shown in Fig. 4, a U-clamp must be attached to the chassis 1. The snap lock 12 is attached to the foldable support plate, in particular the channel plate 10, as a transport safety device.

[0027] How Fig. 2 in conjunction with Fig. 3a to Fig. 3b shows, the snap connection 12 comprises a protruding, spring-loaded locking hook 13, which by means of a guide mouth 14, caught by a locking bracket 15 that can be fixed relative to the chassis 1, an undercut 16 for a locking position 17 ( Fig. 4) can be supplied.

[0028] As in particular Fig. 3a to Fig. 3c show, the locking hook 13 is clamped on one side by means of a spring 18, here a compression spring, and extends at least over a partial length in a longitudinal direction by means of a locking hook shaft 19. Contrary to a prestressing spring effect, the locking hook 13 can execute a vertically directed, resettable deflection in the form of, for example, a lifting or pushing movement, wherein an associated force can be transmitted via a connecting element 20.

[0029] A hook-shaped nose 21 is provided at the free end of the locking hook shaft 19, at an angle to the locking hook shaft 19. The hook-shaped nose 21 can be formed with a vertically directed recess 22 that is open upwards and / or downwards.

[0030] The guide mouth 14 is attached to a coupling member 23, preferably arranged adjacent to the locking hook 13, which has two lateral guide walls 24 diverging outwards and forwards, each having a horizontally directed slot in the middle that is open to the front. The locking hook 13 and the coupling member 23 can form a pre-assembled snap connection 12, wherein a compression and / or tension spring 18 can be provided for spring-loading the locking hook 13. The locking hook 13 engages via a bolt, for example, while the coupling member 23 acts as a support hook, preventing the locking hook 13 (catch) from slipping out. The locking hook 13 and the coupling member 23 can therefore form a double gripper with an aligned gripping axis 25 for horizontal and vertical X, Y guidance of the snap connection 12 in a snap closure with a fixable locking bracket 15. The undercut 16 can also be formed on the locking bracket 15, as in Fig. 4 is shown.

[0031] The undercut 16 is preferably designed as an eyelet, bracket or web or bolt for the locking position 17, wherein, as in the embodiment according to Fig. 4 shows, the eyelet part, the bracket or web / bolt can simultaneously form the locking bracket 15 for the coupling member 23 with the guide mouth 14.

[0032] The undercut 16 is fixedly positioned for the locking position 17 on the undercarriage 1 of the road paver. The snap mechanism according to the invention enables engagement with any type of bracket formed on the undercarriage 1. The locking hook 13 and the coupling member 23 securing this snap hook can alternatively engage with separate brackets.

[0033] The channel plate arrangement 8 is preferably designed such that the releasable locking snap connection 12 is arranged adjacent to a channel plate 10 pivotally connected to the channel plate base section 9 such that the arrangement is axially parallel to a pivot axis formed by a hinge 3.

[0034] The releasably locking snap connection 12 is preferably provided on a front side 4 of the channel plate 10, located in the paving direction R of the road paver. The releasably locking snap connection 12 can be arranged in an upper channel plate area. An associated block-like stopper 30 can also be arranged in a lower channel plate area. The stopper 30 can be a rubber buffer that additionally cushions and / or braces the folded channel plates 10, 11 relative to the chassis 1 between the channel plate 10 and the chassis 1. The number of buffers is selectable; elastomers, such as structural dampers, with adjustable damping lines can also be used as materials.

[0035] For transport of the road paver, the channel plates 10, 11 can be designed as lateral cover elements of the chassis 1 with a predetermined folding angle to the longitudinal center line of the road paver.

[0036] The invention further relates to a road paver with a channel plate arrangement 8 as described above, which comprises extension channel plates 10, 11 on one or both sides of a channel plate base section 9, which are connected to one another in order to be able to variably adjust the effective width of the channel plate arrangement 8 in the horizontal direction by means of removable extension channel plates 11, specifically depending on an extension of the transverse distribution auger 6.

[0037] At least one vertical support strut 31 can be provided to the left and / or right of the road paver, which is connected to a supporting structure 2 of the road paver on the one hand and to a channel plate 11 of a channel plate extension section on the other hand. The at least one support strut 31 can be pivotally connected to the supporting structure 2 by means of a hinge 32, wherein the pivot axis of the support strut 31 and a folding axis of the channel plate extension sections are aligned. The hinge 32 thus forms an upper hinge relative to a lower hinge 3, as shown in Fig. 1 shown. Fig. 1 also shows horizontal struts 33.

[0038] According to further embodiments not shown, several snap fasteners 12 with counterparts can be provided for securing the channel plates 10, 11 during transport. The snap fastener 12 can be attached to any channel plate 10, 11. The locking positions for this on the paver must be selected according to their function. It is also important here that the channel plates 10, 11 can be folded for transport without dismantling the upper support strut 31, and that the support strut 31 can be used as a strain relief for the snap connection(s) 12. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 200 01 246 U1

[0002] EP 2 169 117 B1

[0004] EP 3 988 714 A1

[0005]

Claims

[1] Channel plate arrangement (8) for a road finisher having a chassis (1) with a channel plate base section (9) which is arranged in the paving direction (R) in front of a transverse distributor (6) assigned to a road finisher screed, and wherein at least one side of a channel plate (10) is pivotally connectable laterally to the channel plate base section (9) to extend an effective width of the channel plate arrangement (8), characterized by in that a releasably locking snap connection (12) is provided to secure against unintentional pivoting of the at least one channel plate (10) relative to the chassis (1) in at least one locking position, comprising a projecting, spring-loaded locking hook (13) which can be guided to an undercut (16) for a locking position (17) by means of a guide mouth (14), caught by a locking bracket (15) which can be fixed relative to the chassis (1). [2] Channel plate arrangement according to claim 1, characterized bythat the locking hook (13) is clamped on one side at least in a partial length of a longitudinal direction and extends with a locking hook shaft (19), at an angle to which a hook-shaped nose (21) is provided at the free end of the locking hook shaft (19). [3] Channel plate arrangement according to claim 2, characterized by that the hook-shaped nose (21) is formed with a vertically directed recess (22) which is open upwards and / or downwards. [4] Channel plate arrangement according to one of claims 1 to 3, characterized by in that the guide mouth (14) is attached to a coupling member (23) arranged adjacent to the locking hook (13), which coupling member has two lateral guide walls (24) diverging outwards and forwards and having a horizontally directed slot open to the front in the middle. [5] Channel plate arrangement according to one of claims 1 to 4, characterized by that a compression and / or tension spring (18) is provided for spring loading the locking hook (13). [6] Channel plate arrangement according to one of claims 1 to 5, characterized by that the undercut (16) for the locking position (17) is formed by an eyelet part, bracket or web or bolt. [7] Channel plate arrangement according to claim 6, characterized by that the eyelet part, the bracket or web or bolt for the locking position (17) simultaneously forms the locking bracket (15) for the coupling member (23) with the guide mouth (14). [8] Channel plate arrangement according to one of claims 1 to 7, characterized by that the undercut (16) for the locking position (17) is fixedly positioned relative to the chassis (1) of the road finisher. [9] Channel plate arrangement according to one of claims 1 to 8, characterized bythat the releasably locking snap connection (12) is assigned adjacent to a channel plate (10) pivotally connected to the channel plate base section (9) in such a way that the arrangement is axially parallel to a pivot axis formed by a hinge (3). [10] Channel plate arrangement according to claim 9, characterized by that the releasably locking snap connection is provided on a front side (4) of the channel plate (10) in the paving direction of the road finisher. [11] Channel plate arrangement according to one of claims 1 to 10, characterized by that the releasably locking snap connection (12) is arranged in an upper channel plate area and an associated block-like stopper (30) is arranged in a lower channel plate area. [12] Channel plate arrangement according to one of claims 1 to 11, characterized bythat the channel plates (10, 11) can be pivoted as lateral cover elements of the chassis (1) with a folding angle to the longitudinal center line of the road finisher for transporting the road finisher. [13] Channel plate arrangement according to one of claims 1 to 12, characterized by that the at least one channel plate (10) is hinged to the channel plate base section (9) via a hinge (3). [14] Road finisher with a channel plate arrangement according to one of claims 1 to 13, characterized by in that the channel plate arrangement (8) comprises extension channel plates (10, 11) on one or both sides of a channel plate base section (9), which are connected to one another in order to variably adjust the effective width of the channel plate arrangement (8) in the horizontal direction by means of removable extension channel plates (10, 11) depending on an extension of a transverse distributor screw (6). [15] Road finisher according to one of claims 14, characterized bythat at least one support strut (31) is provided to the left and / or right of the road finisher, which is connected to a supporting structure (2) of the road finisher on the one hand and to a channel plate (11) of a channel plate extension section on the other hand. [16] Road paver according to claim 15, characterized by that the at least one support strut (31) is pivotally connected to the supporting structure (2) by means of a hinge (32), wherein the pivot axis of the support strut (31) and a folding axis of a hinge (3) of the at least one channel plate (10) are aligned. [17] Road finisher according to one of claims 14 to 16, characterized by that the chassis (1) is a crawler chassis or wheel chassis.

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