Paver, in particular slipform paver

Abstract

The paver according to the invention has a machine frame supported by a chassis and a laying device for laying the material, in which at least one distributor device is provided, which has a distributor element arranged in front of the laying device in the working direction, for distributing the material to be laid in front of the laying device. The paver according to the invention is characterized in that at least one distributor device has a distributor arm comprising at least two cantilever parts hinged to each other, the lower portion of the distributor arm being pivotably fastened to the machine frame about an axis substantially horizontal with respect to the working plane of the paver, the distributor element is pivotably secured to the upper portion of the distributor arm about an axis that is substantially horizontal relative to a working plane of the paver. The distributor arm allows the distributor element to move in front of the laying device by pivotal movement of the at least two cantilever members to distribute the material to be laid over a working width of the paver.

Description

Technical Field

[0001] The invention relates to a paving machine, in particular to a slipform paving machine, which comprises a machine frame supported by a traveling mechanism and a paving device for paving materials. Background Art

[0002] Pavers are used to lay unbound and bound layers, such as asphalt or concrete. Slipform pavers with slipforms are used to lay concrete surfaces.

[0003] Known slipform pavers allow particularly economical laying of concrete. The concrete to be laid is laid directly in front of the slipform paver or is transported to the front of the paver from the side via a conveyor belt. In order to distribute the concrete evenly across the entire laying width, the slipform paver can have a distributor device, such as a distributor blade or a distributor drill. After distribution, the concrete is evenly compacted using an electric vibrator or a hydraulic vibrator. The slipform then shapes the concrete slab to a defined width and thickness as it moves forward.

[0004] Slipform pavers are known, for example, from DE 10 2011 101 944 A1, DE 10 200 6 010 793 A1 and WO 2012 / 155904 A2.

[0005] In practice, the problem is to evenly distribute a sufficient amount of material, such as concrete, for laying perpendicular to the working direction of the paver. Usually, the material is unloaded from the side in front of the paver by an excavator or delivered by trucks and dumped in front of the paver in the working direction. Inevitably, separate accumulations will form and the material must therefore be evenly distributed across the entire working width.

[0006] EP 3 702 532 B1 describes a paving machine having a distributor device for distributing material to be laid in a direction extending transversely to the working direction, the distributor device being arranged in front of the paving device along the working direction. The paving machine is provided with a front monitoring device, which is configured to generate height profile data or signals describing the height profile of the material deposited in front of the distributor device. In addition, a control device is provided, which interacts with the monitoring device and controls the distributor device so that the material is transported from a portion where the material height is greater than a target height to a portion where the material height is less than the target height.

[0007] DE 102011 101944 A1 describes a paving machine, in particular a slipform paving machine, having a carriage which is fastened to a machine frame by means of linear guides so that the carriage can be moved in a direction extending transversely to the working direction of the paving machine. Two distribution blades which can be pivoted about a horizontal axis are fastened to the carriage and are arranged at a distance from one another. The distribution blades are plate-shaped elements or blade-shaped elements. By moving the distribution blades transversely to the working direction, the material to be laid can be distributed over the entire working width of the paving machine. Summary of the invention

[0008] The object of the invention is to provide a paver which simplifies the paving process and allows an improved distribution of the material to be laid over the entire working width. This object is achieved according to the invention by the features of claim 1. The subject matter of the dependent claims relates to advantageous embodiments of the invention.

[0009] Another object of the invention is to propose a distributor device which simplifies the modification of the machine frame in order to change the working width of the road paving machine.

[0010] The paving machine according to the invention comprises a machine frame supported by a running gear and a laying device for laying material, wherein at least one distributor device is provided, the distributor device having a distributor element arranged in the working direction in front of the laying device for distributing the material to be laid in front of the laying device. The paving machine can be a so-called four-track machine (with a left front running gear and a right front running gear as well as a left rear running gear and a right rear running gear, as viewed in the working direction), or the paving machine can be a so-called two-track machine (with only a left running gear and a right running gear). The running gears are pivotally fastened to the machine frame so that they can be folded down through an angle of 90° into a transport position for loading onto a low loader.

[0011] The paving machine according to the invention is characterized in that the at least one distributor device has a distributor arm, which includes at least two cantilever parts hinged to each other, wherein the lower part or foot part of the distributor arm is fastened to the machine frame so as to be pivotable about an axis substantially horizontal with respect to the working plane of the paving machine, and the distributor element is fastened to the upper part or head part of the distributor arm so as to be pivotable about an axis substantially horizontal with respect to the working plane of the paving machine. Thus, the distributor arm allows the distributor element to be moved in front of the paving device by the pivoting movement of the at least two cantilever parts so as to be able to distribute the material to be laid over the working width of the paving machine.

[0012] In the present application, the working plane of the paver is understood to mean the surface of the structure to be built, for example the surface of the concrete slab in the case of a slipform paver. For example, if the paver is angled to produce an inclined surface, the pivot axis does not correspond to a horizontal plane relative to the ground surface.

[0013] Fastening the dispenser arm to the machine frame is to be understood as meaning that the dispenser arm is supported by the machine frame. The dispenser arm can be fastened to any part of the machine frame. For example, the dispenser arm can be pivotally fastened to a member of the machine frame, such as a longitudinal member or a transverse member. Suitable brackets can also be used to pivotally fasten the dispenser arm, which enables the dispenser arm to be pivotally moved.

[0014] The distributor arm enables the distributor element to move within a relatively large range of motion, so that the material to be laid can be captured and distributed over the entire working width of the paver. The distributor element can be moved not only in the plane of the terrain, but also in the vertical plane (i.e. upwards or downwards relative to the surface of the terrain), so that the distributor element can not only capture and move the material to be laid on one side, but also penetrate the material from above. This simplifies the distribution of material across the entire working width.

[0015] The control system of the distributor arm of the distributor device of the paving machine according to the invention can interact with the front monitoring device known from EP3702532B1 in order to control the distributor arm so that the material is distributed in front of the paving machine. The known front monitoring device allows monitoring at the front relatively far in front in the working direction. In combination with the known monitoring device, the advantages of the distributor device of the paving machine according to the invention are particularly applicable, because due to the large range of movement of the distributor arm, the distributor device of the paving machine can also capture material monitored by the monitoring device and relatively far away from the paving device in the working direction.

[0016] The embodiments of the invention described below may include one or more features or a combination of multiple features mentioned below. Features specified with the indefinite article may also exist more than once, if the indefinite article is not to be understood as explicitly referring to a single use. Features specified with numerical words (e.g. "first and second") do not exclude that the number of these features may be greater than the number indicated by the numerical word. In the description of all embodiments, the expression "may" should also be understood as "preferably" or "conveniently".

[0017] One embodiment of a paving machine provides a specific design of a distributor element, which is fundamentally different from the known plate-shaped distributor blades. In this embodiment, the distributor element is a body designed as a cookie cutter. Therefore, the distributor element is a body that is open at the top and at the bottom and is limited only by the circumferential closed side walls. The cookie cutter can in principle have any shape, as long as the circumferential wall can penetrate from above into the material to be laid by a corresponding movement of the distributor arm or the distributor element in the vertical direction, and the material can be captured and moved by a corresponding movement of the distributor arm or the distributor element in the horizontal direction. Therefore, the distributor element can be designed as, for example, a hollow circular, oval, rectangular or polygonal body. In tests, distributor elements in the form of hollow cylinders or hollow polygons have proven to be effective, which can be pushed or pressed into the material to be laid in the manner of a cookie cutter with relatively low forces. However, the distributor element of the slipform paving machine according to the invention can also be a conventional distributor blade.

[0018] The distributor element can pick up and move a certain amount of material, which is determined by the volume enclosed by the distributor element. Compared with plate-shaped distributing blades that can only transfer material to be laid, the distributor element according to the invention makes it easier to pick up the material to be laid at a specific location and move the material to a specific location in front of the laying device, because a certain amount of material can be captured and cannot be lost during the movement of the distributor element.

[0019] In tests, it has been found to be particularly advantageous for practical applications if the ratio of the maximum width to the maximum height of the distributor element designed as a hollow body is between 1.5 and 2.5, in particular between 1.7 and 2.3. Furthermore, it has been found to be particularly advantageous if the hollow body encompasses a width between 0.1 and 1 m. 3 Volumes between 0.2 and 0.4 m 3 The volume between is used to receive the material to be laid.

[0020] The distributor element can be designed in the form of an attachment for the distributor arm, so that the paving machine can be equipped with distributor elements of different designs (ie, sizes or shapes) for each application. For this purpose, suitable mountings for replaceably fastening the distributor element belong to the prior art.

[0021] The range of motion of the dispenser element can be further increased by at least one of the at least two cantilever parts being a telescopic cantilever part. Compared to a dispenser arm with a non-telescopic cantilever part, a more compact design can be achieved by at least one telescopic cantilever part with the same range of motion.

[0022] The range of motion of the distributor element can also be further increased by fastening the lower or foot portion of the distributor arm to the machine frame so as to pivot about an axis that is substantially perpendicular to the working plane of the paving machine, thereby achieving further degrees of freedom.

[0023] The machine frame of the paving machine according to the invention can have a left frame part extending in the working direction and a right frame part extending in the working direction, and the machine frame can have a machine frame part extending transversely to the working direction between the left frame part and the right frame part. Each frame part can in turn consist of a plurality of parts. This structure of the paving machine allows the distributor device to be fastened to the frame part extending transversely to the working direction between the right frame part and the left frame part.

[0024] The central arrangement has the advantage that, with appropriate dimensions, a single distributor device is sufficient to cover the area in front of the laying device over the entire working width of the paving machine. However, this usually requires that the distributor arm is pivotably fastened to the machine frame about a substantially vertical axis in order to be able to cover the entire working width of the paving machine. However, the paving machine can also have two distributor devices, which are arranged in front of the paving device at a distance from each other in the working direction for distributing the material to be laid in front of the paving device.

[0025] The lower part or foot part of the distributor arm can also be fastened to the left or right side of the machine frame (for example to the left frame part or the right frame part) in the working direction directly or via an intermediate part (for example a side arm of the walking mechanism), so that at least two cantilever parts of the distributor arm extend in a direction transverse to the working direction. If the dimensions are appropriately customized, a distributor device on only one of the two sides is sufficient to cover the entire area in front of the paving machine. However, the distributor device can also be arranged in the area of ​​the left frame part and the right frame part. These embodiments do not in principle require a pivoting movement of the distributor arm about a vertical axis, but even a pivoting movement about a small radius can significantly increase the width of the area covered by the distributor element.

[0026] The frame section of the machine frame extending transversely to the working direction can be of variable length in the transverse direction. Such a frame section belongs to the prior art. The frame section can, for example, be designed to be extendable using suitable attachments or telescopic sections. In such a frame section, in contrast to a distributor blade for covering the entire area in front, the distributor device according to the invention does not in principle need to be fastened to the machine frame for movement in the transverse direction, which has proven to be advantageous since no carriage movable in the transverse direction is required (which would lead to complex modifications to increase or reduce the working width of the paving machine or would require further changes to the machine frame).

[0027] Another embodiment provides that the first cantilever part is articulated to the machine frame via a first piston / cylinder arrangement structure so as to be pivotable about an axis which is substantially horizontal relative to the working plane, the second cantilever part is articulated to the first cantilever part via a second piston / cylinder arrangement structure so as to be pivotable about an axis which is substantially horizontal relative to the working plane, and the distributor element is pivotally articulated to the second piston / cylinder arrangement structure via a third piston / cylinder arrangement structure.

[0028] The control unit for actuating the piston / cylinder arrangement can be configured to actuate at least two of the piston / cylinder arrangements simultaneously by actuating the operating element so that the distributor arm performs a predetermined movement. In the present application, a control unit is understood to be a device that controls the inflow or outflow of pressure medium in combination with a hydraulic unit to actuate the piston / cylinder arrangement, such as a control valve in a hydraulic system.

[0029] For example, the two arm parts can be moved, for example, so that the distributor element can be moved back and forth in the horizontal plane, without having to operate a plurality of operating elements simultaneously in order to control each arm part individually. For example, the control unit can be configured so that, during the pivoting movement of the distributor arm, the distributor element remains in a predetermined angular position, in particular in a position parallel to the ground, in order to be able to move the material. This simplifies the operation of the paving machine. Such a control system per se belongs to the prior art.

[0030] A further embodiment provides that the first and / or the second cantilever part is designed as a parallelogram guide, so that during the pivoting movement of the dispenser arm the dispenser element remains in a predetermined angular position. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Embodiments of the present invention will be explained in more detail below with reference to the accompanying drawings.

[0032] In the attached picture:

[0033] Figure 1 is a perspective view of an embodiment of a slipform paver according to the present invention;

[0034] Figure 2 Is from Figure 1 A perspective view of a distributor arm of a distributor device of a slipform paving machine according to the present invention;

[0035] Figure 3A Is from Figure 2 A perspective view of a distributor element of a distributor device;

[0036] Figure 3B Is from Figure 2 A plan view of a distributor element of a distributor device;

[0037] Figure 3C Is from Figure 2A side view of a distributor element of a distributor device from the direction of arrow I;

[0038] Figure 3D Is from Figure 2 A side view of a distributor element of a distributor device from the direction of arrow II;

[0039] Figure 4 is a schematic diagram of a slipform paver according to the invention having a central arrangement of a distributor device;

[0040] Figure 5 is a schematic diagram of another embodiment of a slipform paver according to the invention having a central arrangement of the distributor device;

[0041] Figure 6 is a schematic diagram of a slipform paver according to the invention, wherein two distributor devices are arranged eccentrically;

[0042] Figure 7 is a schematic diagram of a slipform paver according to the invention having a translational movement of a distributor device;

[0043] Figure 8 is a schematic diagram of another embodiment of a slipform paver according to the invention, the slipform paver having a lateral arrangement of the distributor device;

[0044] Fig. 9 is a schematic diagram of a control system for a dispenser device. DETAILED DESCRIPTION

[0045] Figure 1 is a perspective view of a slipform paver as an example of a self-propelled construction machine. The slipform paver has a machine frame 1 supported by a traveling gear 2. The traveling gear 2 comprises a left front crawler 3A and a right front crawler 3B in a working direction A, and a left rear crawler 4A and a right rear crawler 4B in a working direction A, which rest on the ground. The crawlers 3A, 3B, 4A, 4B are fastened to the machine frame 1 by means of a left front lifting device 5A and a right front lifting device 5B and a left rear lifting device 6A and a right rear lifting device 6B, so that the machine frame 1 can be raised or lowered relative to the ground surface. The crawlers 3A, 3B, 4A, 4B are pivotally fastened to the machine frame 1 so that the crawlers 3A, 3B, 4A, 4B can be folded down at an angle of 90° into a transport position for loading onto a low loader. The pivoting movement of the crawlers 3A, 3B, 4A, 4B is performed by means of a piston / cylinder arrangement 7, 8, 9, 10. Figure 1 The slipform paving machine is shown in a working position, wherein the travelling gear is aligned in the working direction A. The following description relates to this position. In this position, the left front side arm 3AA and the right front side arm 3BA of the left front crawler 3A and the right front crawler 3B also extend in the working direction A.

[0046] The machine frame 1 comprises, along the working direction A, a left frame part 11A, a right frame part 11B and an intermediate frame part 11C extending transversely to the working direction A. The intermediate frame part 11C can be extended or shortened to change the working width of the slipform paving machine. For this purpose, separate frame pieces 11CA, 11CB, 11CC can be inserted into or removed from the intermediate frame part 11C.

[0047] Laying device 12 for producing a concrete layer for a road (in Figure 1 The laying device 12 is arranged between the outer frame parts 11A, 11B and extends transversely to the working direction A. The laying device 12 is a slipform of a slipform paving machine, also having a variable working width, which can be adjusted, for example, by inserting and removing individual slipform segments. Such slipforms belong to the prior art.

[0048] Furthermore, the slipform paver comprises a distributor device 13 for distributing the concrete to be laid over the entire working width of the paver in a direction extending transversely to the working direction A. The distributor device 13 is arranged in the working direction A in front of the slipform 12 .

[0049] Figure 1 An embodiment of a slipform paving machine is shown in which a distributor device 13 having a distributor arm 14 is arranged in the middle between the left frame part 11A and the right frame part 11B. Figure 2 An enlarged perspective view of the dispenser arm 14 is shown.

[0050] The distributor arm 14 comprises a first cantilever part 15 on the machine frame side and a second cantilever part 16 at the free end of the first cantilever part 15, which are pivotably connected to each other about an axis 17 horizontal with respect to the working plane. The lower part or foot part 15A of the first cantilever part 15 is pivotably fastened to a pivot part 19 about an axis 18 horizontal with respect to the working plane, and the distributor element 20 is pivotably fastened to an upper part or head part 16A of the second cantilever part 16 about an axis 21 horizontal with respect to the working plane. For actuating the first cantilever part 15, a first piston / cylinder arrangement 22 is provided, the piston 22A of which is articulated to the pivot part 19 and the cylinder 22B of which is articulated to the first cantilever part 15, and for actuating the second cantilever part 16, a second piston / cylinder arrangement 23 is provided, the cylinder 23A of which is articulated to the first cantilever part 15 and the piston 23B of which is articulated to the second cantilever part 16. By retracting and extending the piston 22A of the first piston / cylinder arrangement 22, the first cantilever part 15 can be raised and lowered relative to the ground surface, and by retracting and extending the piston 23B of the second piston / cylinder arrangement 23, the second cantilever part 16 can be pivoted. The distributor element 20 can be pivoted by retracting or extending the piston 24A of the third piston / cylinder arrangement 24, the cylinder 24B of which is articulated to the second cantilever part 16 by means of a lever mechanism 27 comprising two levers 25, 26, which is designed so that the rotation angle of the distributor element 20 is reduced and the operating torque is increased. Instead of the piston of the piston / cylinder arrangement, the cylinder of the piston / cylinder arrangement can also be articulated to each part, or vice versa.

[0051] Figure 3A is a stereogram of the distributor element, Figure 3B is an enlarged plan view of the distributor element. Figure 3C and 3D The distributor element is shown from Figure 1 The arrow I( Figure 3C ) and II( Figure 3D ). The distributor element 20 is designed to be similar to a cookie cutter, by which materials, in particular concrete, on the ground surface can be picked up and moved. In the present embodiment, the distributor element 20 is designed to be similar to a hollow polygonal body with openings at the top and bottom. The side wall 20A of the hollow body can be relatively easily made of a plurality of rectangular steel plates welded together. However, the hollow body can also be, for example, a hollow cylinder.

[0052] The distributor element 20 is hinged to the second cantilever part 16 by means of a mounting 20B comprising two legs 20BA arranged adjacent to each other spanning the hollow body. The structure is further strengthened by lateral supports 20BB engaging the legs 20BA and the side walls 20A.

[0053] The pivoting portion 19 is pivotally mounted on a support 29 about an axis 30 perpendicular to the working plane ( Figure 1 ), which is arranged on the machine frame 1 between the left frame part 11A and the right frame part 11B. In the working direction A, the piston 31A of the fourth piston / cylinder arrangement 31 engages with the right side of the bracket 29, and in the working direction A, the piston 32A of the fifth piston / cylinder arrangement 32 engages with the left side of the bracket 29. Figure 1 The cylinders of the piston / cylinder arrangements 31 and 32, which are hidden by other components, are connected to the machine frame part of the machine frame 1. By actuating the fourth piston / cylinder arrangement 31 and the fifth piston / cylinder arrangement 32, the pivoting part 29 can be pivoted to the right or to the left in the working direction A. Here, too, pistons and cylinders can be interchanged again when tightening the piston / cylinder arrangement.

[0054] Figure 4 Shown in plan view Figure 1 A highly simplified schematic representation of a slipform paving machine of , in which corresponding parts are marked with the same reference numerals. In the working direction A, the front arms 3AA, 3BA of the traveling mechanisms 3A to 4B are in a working position. The centrally arranged distributor arm 14 of the distributor device 13 can be pivoted to both sides within a wide range of movement B from a starting position extending in the working direction A. The range of movement B or the working range of the distributor arm 14 is limited by the length of the boom parts 15, 16 and their pivot angle. By designing at least one of the boom parts 15, 16 as a telescopic boom part, an even larger range of movement can be achieved.

[0055] Figure 5 A highly simplified schematic diagram of a slipform paving machine is shown, in which the first boom part 15 is telescopic. Corresponding parts are again provided with the same reference numerals. The first boom part 15 consists of at least two hollow profiles 15A, 15B, which extend inside each other and can be extended by one or more piston / cylinder arrangements 15C (only in the case of Figure 5 ) retracts and extends to increase or decrease the range of motion B.

[0056] Figure 6 Another embodiment is shown, which Figure 4 or Figure 5The embodiment in is different in that, instead of a central distributor device 13, two eccentric distributor devices 13′ and 13″ arranged at a distance from one another are fastened to a central machine frame part 11C of the machine frame 1. Corresponding parts are again provided with the same reference numerals. The distributor arms 14′, 14″ of the two distributor devices 13′, 13″ are each pivotably mounted on the machine frame 1 about a horizontal axis 30′, 30″. Even though the cantilever parts 15′, 15″, 16′, 16″ of the distributor arms 14′, 14″ are relatively short, this embodiment allows a relatively large working range.

[0057] The above-described embodiment has the advantage that a relatively narrow working range can be created without the need for linear guides, which are provided in conventional distributor devices with distribution blades that move over the entire working width of the slipform paving machine in order to pick up material. Since no linear guides are required, the width of the machine frame can be increased or decreased relatively easily.

[0058] Figure 7 An alternative embodiment is shown, which is Figure 6 The embodiment in differs in that, instead of two eccentric distributor devices arranged at a certain distance from each other, only one distributor device 13 is provided, which, however, can be moved in a direction extending transversely to the working direction A of the slipform paver. A linear guide 31 with a carriage 31A is arranged on an intermediate frame part 11C of the machine frame 1, running transversely to the working direction, and a distributor arm 14 of the distributor device 13 is fastened to the carriage 31A. The distributor arm 14 can be pivotally fastened to the carriage 31A about a vertical axis 30″′. However, in a translational distributor device, this is generally not necessary to cover a large range of movements. However, this embodiment requires modifications to the linear guide in order to change the working width of the slipform paver.

[0059] Figure 8 A further alternative embodiment is shown, which differs from the above-described embodiment in that the distributor device 13 is fastened to the machine frame 1 so that its distributor arm 14 extends in a direction extending transversely to the working direction A. In this embodiment, the distributor arm is fastened to the inside of the side arm 3BA of the right chassis 3B located on the right side of the machine frame 1 in the working direction A. If the length dimension of the boom parts 15, 16 is large enough, the working range B can extend over the entire working width. This embodiment can also have a distributor device 13 on the inside of the side arm 3AA of the left chassis 3A located on the left side of the machine frame 1 in the working direction A. If the distributor device is arranged on both the left and right sides of the machine frame 1, the entire working width can be covered even with a relatively compact distributor device.

[0060] Fig. 9A simplified schematic diagram of a control system of a piston / cylinder arrangement of a distributor device 13 is shown. The control system comprises a control unit 33, which may form an independent component or at least a part may be a component of a central control unit (not shown) of a construction machine. The control unit 33 may have, for example, a general purpose processor, a digital signal processor (DSP) for continuous processing of digital signals, a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other integrated circuits (IC) or hardware components. A data processing program (software) may run on the hardware components to control the individual components. The control unit 33 interacts with a hydraulic unit 34 of the hydraulic system, which in turn interacts with the piston / cylinder arrangement 22, 23, 24, 31, 32 of the distributor device 13, so that the piston / cylinder arrangement is actuated depending on the control command from the control unit. In addition, the control system comprises an input unit 35 for a machine operator, which may comprise at least one switch 35A, a button 35B, a joystick 35C or a touch-sensitive screen 35D (touch screen). The input unit 35 is connected to the control unit 33 via a control line 36, and the control unit 33 receives output signals from the input unit. The control unit 33 is configured to control the associated piston / cylinder arrangement 22, 23, 24, 31, 32 depending on an output signal from the control unit, which corresponds to a switching position of an operating element, such as a position of a switch, a button or a joystick or an input on a touch-sensitive screen (touch screen), so as to raise or lower the first cantilever part 15 and / or the second cantilever part 16 and / or pivot the dispensing arm 14 to the left or right. The control unit 33 is preferably configured to simultaneously actuate at least two of the piston / cylinder arrangements 22, 23, 24, 31, 32 by actuating the operating element, and thus the dispenser element 20 performs a movement along a predetermined path. In a preferred embodiment, for example, the first piston / cylinder arrangement 22 and the second piston / cylinder arrangement 23 are actuated simultaneously, so that when the dispenser arm 14 is extended, the dispensing element 20 remains at a predetermined height. The third piston / cylinder arrangement 24 can be actuated so that the angular position of the distributor element 20 relative to the ground surface remains unchanged, regardless of the position of the first cantilever part 15 and / or the second cantilever part 16, so that, for example, the distributor element 20 always remains parallel to the ground surface. This makes it easier for the machine operator to operate the distributor element 20.

[0061] The dispenser arm 14 of the dispenser device 13 may also have a parallelogram guide known to those skilled in the art, which is designed to enable the cantilever parts 15, 16 or the dispenser element 20 to perform / execute a predetermined movement, for example the dispenser element 20 remains parallel to the ground when the dispenser arm 14 moves.

Claims

1. A paving machine, in particular a slipform paving machine, comprising a machine frame (1) supported by a traveling mechanism (3A, 3B, 4A, 4B) and a laying device (12) for laying material, and provided with at least one distributor device (13), wherein the at least one distributor device (13) has a distributor element (20), and the distributor element (20) is arranged in front of the laying device (12) in the working direction A for distributing the material to be laid in front of the laying device (12); It is characterized in that The distributor device (13) has a distributor arm (14), which includes at least two cantilever parts (15, 16) hinged to each other, the lower part of the distributor arm (14) being pivotably fastened to the machine frame (1) about an axis (18) substantially horizontal with respect to the working plane of the paving machine, and the distributor element (20) being pivotably fastened to the upper part of the distributor arm (14) about an axis (21) substantially horizontal with respect to the working plane of the paving machine, so that the distributor element (20) can be moved in front of the laying device to distribute the material to be laid by pivoting movement of the at least two cantilever parts (15, 16).

2. The paving machine according to claim 1, characterized in that: The dispenser element (20) is a body designed in the manner of a cookie cutter.

3. The paving machine according to claim 2, characterized in that: The distributor element (20) is designed as a hollow circular, oval, rectangular or polygonal body.

4. The paving machine according to claim 3, characterized in that: The ratio of the maximum width to the maximum height of the hollow body is between 1.5 and 2.5, in particular between 1.7 and 2.

3.

5. The paving machine according to claim 3 or 4, characterized in that: The distributor element (20) surrounds 0.1m 3 Up to 1m 3 , especially 0.2m 3 Up to 0.4m 3 The volume between is used to receive the material to be laid.

6. The paving machine according to any one of claims 1 to 5, characterized in that: At least one of the at least two cantilever parts (15, 16) is designed as a telescopic cantilever part.

7. The paving machine according to any one of claims 1 to 6, characterized in that: The lower part of the distributor arm (14) is pivotably fastened to the machine frame (1) about an axis (30) which is substantially perpendicular to the working plane of the paving machine.

8. The paving machine according to any one of claims 1 to 7, characterized in that: The machine frame (1) has a left frame portion (11A) extending along the working direction A and a right frame portion (11B) extending along the working direction, and the machine frame (1) has a frame portion (11C) extending transversely to the working direction.

9. The paving machine according to claim 8, characterized in that: The frame part (11C) of the machine frame (1) extending transversely to the working direction A has a variable length in the transverse direction.

10. The paving machine according to claim 8 or 9, characterized in that: The lower portion of the dispenser arm (14) is fastened to the frame portion (11C), which extends transversely to the working direction A midway between the left frame portion (11A) and the right frame portion (11B).

11. The paving machine according to claim 8 or 9, characterized in that: The lower portion of the dispenser arm (14) is fastened to the frame portion (11C) extending transversely to the working direction A so as to be movable between a left frame portion (11A) and a right frame portion (11B) in a direction extending transversely to the working direction.

12. The paving machine according to any one of claims 1 to 11, characterized in that: The paving machine has two distributor devices (13', 13"), which are arranged in front of the paving device (12) along the working direction A and at a certain distance from each other, and are used to distribute the material to be laid in front of the paving device (12).

13. The paving machine according to any one of claims 1 to 12, characterized in that, except for the reference back to claim 11, The lower part of the distributor arm (14) is fastened to the left or right side of the machine frame (1) along the working direction A so that at least two cantilever parts (15, 16) of the distributor arm (14) extend in a direction extending transversely to the working direction.

14. The paving machine according to any one of claims 1 to 13, characterized in that: The first cantilever part (15) is pivotally articulated to the machine frame (1) by means of a first piston / cylinder arrangement (22) about an axis (18) which is substantially horizontal relative to the working plane, the second cantilever part (16) is pivotally articulated to the first cantilever part (15) by means of a second piston / cylinder arrangement (23) about an axis (17) which is substantially horizontal relative to the working plane, and the distributor element (20) is pivotally articulated to the second cantilever part (16) by means of a third piston / cylinder arrangement (24).

15. The paving machine according to claim 14, characterized in that: A control unit for actuating the piston / cylinder arrangements (22, 23, 24) is provided, the control unit being configured to actuate at least two of the piston / cylinder arrangements (22, 23, 24) simultaneously by actuating an operating element, and thereby causing the distributor element (20) to perform a movement along a predetermined path.

16. The paving machine according to any one of claims 1 to 15, characterized in that: The first cantilever part (15) and / or the second cantilever part (16) are designed as parallelogram guides, so that the dispenser element (20) remains in a predetermined angular position during the pivoting movement of the dispenser arm (14).

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