EP1408158B1 - Collecting mouldboard for surface milling machines - Google Patents

Abstract

Stripping arrangement for cutting rollers (2) of a construction machine, especially a road-cutting machine, comprises at least one height-adjustable cutting blade (10) arranged behind the cutting rollers in the direction of travel and sliding over the surface cut or to be cut by the cutting rollers. The cutting blade covers the maximum cutting width. A fixing device (16) that can be adjusted in height relative to the cutting blade is provided for at least one of the stripper lower parts (20) adjusted to the cutting rollers. The stripper lower part is positioned with the aid of the fixing device in a position corresponding to the cutting rollers within the width of the stripping blade. Independent claims are also included for the following: (1) self-propelled construction machine, especially a road-cutting machine; and (2) process for stripping remaining cutting material behind a cutting roller of a construction machine, especially a road-cutting machine.

Description

The invention relates to a self-propelled construction machine, in particular a road milling machine, a stripping device for milling rollers on a construction machine, and a method according to the preamble of claims 1 and 16, respectively.

Road milling machines are known in which milling rollers of different milling width can be used within a maximum milling width. In the direction of travel in front of or behind the milling drum is a transport device for conveying the milled material. In the direction of travel behind the milling drum a collecting plate is arranged vertically adjustable, which can slide over the milled from the milling drum surface and clean this surface of remaining milled material.

In particular, in road milling machines that allow a quick replacement of milling drums of different milling width, it is desirable that the collecting plate is quickly adapted to the particular milling width required.

The collection plate is needed to scrape off milled material that accumulates in the direction of travel behind the milling drum, from the milled surface, and leave a largely clean milled surface. That behind the milling drum accumulated material is again supplied to the milling drum until it is taken up by the transport device and transported away.

From DE 38 23 480 C a segmented collecting plate is known in which the individual segments are arranged separately adjustable in height to adapt to different milling widths of different milling drums. The segments are arranged side by side in a row. The disadvantage here is that due to the specified width of the segments only milling rollers with a segmentation of the segments corresponding width can be used. Furthermore, the position of the milling drum is determined by the segmentation.

The invention is therefore an object of the invention to provide a self-propelled construction machine, in particular road milling machine, a stripping device, and a method with which flexible, cost-effective and with low installation costs adaptation to the Fräswalzenbreite is possible.

To solve this problem serve the features of claims 1 and 16, respectively.

The invention advantageously provides that a first collecting plate covers the maximum milling width, and that a fastening device which is adjustable in height relative to the first collecting plate is provided for at least one second collecting plate adapted to at least one milling roller or milling roller used in each case.

The second collecting plate can be positioned within the width of the first collecting plate by means of the fastening device in a position corresponding to the respective milling drum.

The second header is positioned or mounted on the fixture when replacing the milling drum. In the case of two spaced-apart milling drums, either two busbars are positioned on the mounting device or a uniform second busbar, which is adapted to the milling contour generated by both milling drums. Such a second collecting plate can be used, for example, when milling on both sides of rails.

The invention advantageously makes it possible for the first collecting plate to slide on the surface to be milled, while the second collecting plate slides on the milled surface. The fact that the fastening device is height-adjustable independently of the first collecting plate, the stripping device can also be used in cases where working with a varying depth of cut. In this case, the first collecting plate rests on the surface to be milled or has a predetermined distance to it, while the second collecting plate can be adapted to the respective milling depth according to the varying cutting depth with the aid of the fastening device.

The stripping device according to the invention can therefore also be used in such a way that the first collecting plate has a distance to the surface to be milled, while the second collecting plate rests on the milled surface. In this case, a part of the milled material is deposited next to the milled surface.

It is particularly advantageous that with little installation effort, the stripping device can be adapted to the respective used milling drum different milling width, different Fräswalzenkontur and different Fräswalzenposition, with only the second collecting plate must be replaced.

The fastening device is preferably arranged in the direction of travel behind the first collecting plate.

The profile shape of the second collective shield is adapted to the Fräswalzenprofilform. In this way, the second collecting plate can also be used for milling rollers with non-circular cylindrical shape, e.g. with a cross-sectionally V-shaped milling groove.

The fastening device preferably extends over the entire maximum milling width and is arranged parallel to and / or in the direction of travel behind the first collecting shield. Characterized in that the fastening device extends over the entire width of the first collecting shield, is a positioning or Assembly of the second collective shield at any point within the width of the first collective shield possible.

In a preferred embodiment, it is provided that the fastening device carries a second collection plate, which also extends over the entire milling width. When using a milling drum with maximum milling width, this makes it possible to use the stripping device with the first collecting plate and the second collecting plate as a second collecting plate and put both collecting plates on the milled surface. In this case, the first collecting plate can be operated with a lower contact pressure. The fact that the milled surface is peeled off twice, a higher degree of cleanliness can be achieved.

The lower and / or lateral edges of the second header plate, as well as the lower edges of the first header plate have wear strips. The wear strips are interchangeable and are preferably made of wear-resistant hard metals.

The second collecting plate, which is height-adjustable relative to the first collecting plate, can be moved along a guide parallel to and / or on the first collecting plate. For example, the second collecting plate can be moved along a substantially vertical rail guide on the first collecting plate or independently of the first collecting plate in a lateral guide parallel to the first collecting plate. The first collection plate and the second collection plate can be slightly tilted against the direction of travel.

The second collection plate may have at least one opening for defined storage of the milled material. The opening consists of a downwardly open recess, with the help of selectively milled material can be stored in strip form on and / or next to the milled surface. If milled material is to be deposited next to the milled surface, the second collecting plate may have a laterally projecting portion, which has a distance from the milled surface for depositing the milled material. The contour of the second collective shield can generally be freely selected, see above that due to the quick replacement of the second collective shield fast adaptation to different tasks can be done.

The first header may have wear ledges with rounded lower edges and / or the second header may have wear edges with substantially sharp lower edges.

In one embodiment it can be provided that the stripping device in the direction of travel behind the milling drum, a conveyor, preferably articulated receives.

For this purpose, it can be provided that the conveyor is attached to the fastening device in the direction of travel behind the roller articulated. It is thus obvious that the invention can also be used in a road milling machine in Hinterladerbauform.

The first collecting plate and / or the fastening device has a passage opening for the ejection of the milled material onto the conveyor.

The conveying device can be pivotably connected to the fastening device both about a horizontal axis as well as a substantially vertical axis.

The lower edge of the passage openings is relative to the conveyor regardless of the set routing depth.

According to a method of the invention, it is provided that for stripping the milled surface with a constant or varying depth a second collecting plate is used, which positioned by means of a relative to the first collecting height-adjustable fastening device within the width of the first collecting plate, according to the position of each used milling drum becomes.

In the following, embodiments of the invention will be explained in more detail with reference to the drawings.

Fig. 1

eine erfindungsgemäße Frontlader-Straßenfräsmaschine,

Fig. 2

die erfindungsgemäße Abstreifeinrichtung hinter einer Fräswalze,

Fig. 3a bis 3 e

das erfindungsgemäße erste Sammelschild mit unterschiedlichen der Fräswalzenbreite angepassten zweiten Sammelschildern,

Fig. 4

eine Position des zweiten Sammelschildes bei linksbündiger Anordnung der Fräswalze,

Fig. 5

eine mögliche Anordnung des zweiten Sammelschildes beim Fräsen mit maximaler Fräsbreite,

Fig. 6

eine erfindungsgemäße Hecklader-Straßenfräsmaschine,

Fig. 7

eine der Figur 2 entsprechende schematische Darstellung des zweiten Sammelschildes bei einer Hinterlader-Straßenfräsmaschine,

Fig. 8 und Fig. 9

den Fig. 4 und 5 entsprechende Darstellungen der zweiten Sammelschildes einer Hinterlader-Straßenfräsmaschine,

Fig. 10

eine Aufhängung einer Fördereinrichtung an dem erfindungsgemäßen zweiten Sammelschild, und

Fig. 11

eine Sicht aus dem Walzenkasten auf das erste Sammelschild der Abstreifeinrichtung bei einem Ausführungsbeispiel der Abstreifeinrichtung für eine Hinterlader-Straßenfräsmaschine.

Show it:

Fig. 1

a front-end loader road milling machine according to the invention,

Fig. 2

the stripping device according to the invention behind a milling drum,

Fig. 3a to 3 e

the first collecting plate according to the invention with different second collecting plates adapted to the milling drum width,

Fig. 4

a position of the second collective shield with left-aligned arrangement of the milling drum,

Fig. 5

a possible arrangement of the second collective shield when milling with maximum milling width,

Fig. 6

a rear-loading road milling machine according to the invention,

Fig. 7

2 is a schematic representation of the second collecting plate in a back-loader road milling machine corresponding to FIG. 2, FIG.

FIGS. 8 and 9

4 and 5 corresponding representations of the second collective shield of a Hinterlader-road milling machine,

Fig. 10

a suspension of a conveyor on the second collecting plate according to the invention, and

Fig. 11

a view of the roller box on the first collecting plate of the stripping device in an embodiment of the stripping device for a rear-loading road milling machine.

Fig. 1 shows the application of the invention in a front-loading road milling machine. Such road milling machines 1 may be provided with a milling roller quick change system with which a change of the milling drum 2 with little time and effort is possible. As a result, different orders can be processed with the same road milling machine.

The self-propelled road milling machine 1 is equipped in Fig. 1 with wheels, but can of course be worn by track drives, as shown in Fig. 2.

The milling drum 2 is arranged in the embodiment of the road milling machine 1 according to FIG. 1 at the rear end of the machine and surrounded by a roller box 4. At the rear end of the roller box 4 in the direction of travel, a height-adjustable stripping device 6 is arranged, which has a first collecting plate 10, which covers the maximum milling width of the widest milling drum 2 and is guided, for example, height adjustable in a portal 12 of the machine frame 14. At the first collecting plate 10 or at the portal 12 of the machine frame 14, as best seen in Fig. 2, a shield-shaped fastening means 16 for a second collecting plate 20 parallel to the first collecting plate 10 is guided adjustable in height.

The fastening device 16 is preferably arranged behind the first collecting plate 10 because of the better accessibility in the direction of travel, and moreover preferably so that it can be moved up and down parallel to the first collecting plate 10 with the aid of a piston-cylinder unit 24.

The first collecting plate 10 is in turn movable up and down via a piston-cylinder unit 22 relative to the machine frame 14 or relative to the gantry 12 or relative to a roller box of the milling drum 2.

Here, it is preferably provided that the first collecting plate 10 is guided in lateral longitudinal guides of the portal 12.

The fastening device 16 may also be guided in a longitudinal guide of the portal 12 or as in the embodiments of FIGS. 2 to 5, along a rail guide 26 on the first collecting plate 10 by means of the piston-cylinder unit 24 to be moved.

As can be seen in FIG. 2, the fastening device 16 preferably extends over almost the entire width of the first header 10.

The brackets of the rail guide 26 consist of fastening screws, which are passed through a sliding block 30 and a groove 32 and are screwed into the first header plate 10.

The second collecting plate 20 is adapted in terms of width and contour of the outer contour of the milling drum 2. In the case of a circular cylindrical milling drum 2, as shown in FIGS. shown, the lower edge of the second collecting plate 20 is rectilinear and parallel to the axis of the milling drum 2. Accordingly, the lower edge extends, for example in a barrel-shaped milling drum 2 arcuate.

The fastening device 16 has a multiplicity of bores 28, which make it possible, with the aid of fastening screws and through-holes 29 of the second header 20, to fix the second header at different positions, preferably right-justified or left-justified, but also in intermediate positions.

As shown in Figs. 3a to 3e, different second collecting signs 20 can be fastened to the fastening device 16, which can be fastened in a simple manner and in a short time to the fastening device 16 when a milling drum change takes place.

As shown in Figs. 4 and 5, a different arrangement of a second header 20 of the same width on the shield-shaped fastening device 16 is possible.

At the lower edge of the second collecting plate 20 may be provided for a milled surface 3 towards open recess to deliberately deposit a strip milled material on the milled surface 3 for further use.

Furthermore, as shown in Fig. 5, the scraping means may be used in a position where only the first header 10 is in contact with the milled surface when a milling cutter having a maximum milling width is used.

The stripping device also enables a mode of operation in which the first header 10 does not rest on the surface to be milled, but is held at a distance therefrom while the fixture 16 is shut down with the second header 20, such that the lower edge of the second header 20 on the milled surface 3 slides. In this case, a material storage is possible laterally next to the milling area, wherein the distance of the lower edge of the first collecting plate 10 to the ungrastened surface, the amount of deposited material is adjustable.

Finally, when the full milling width is utilized, the stripping device can also be operated with a second collecting plate 20 with the maximum milling width, in which case the milled surface 3 can be pulled off both from the first collecting plate 10 and from the second collecting plate of the same width in order to achieve a higher degree of cleaning to achieve (Fig. 3a).

As shown in Figs. 2 and 11, the lower edge and the side edges of the second header 20 have wear strips 34, 36 which are replaceable.

The lower edges and side edges of the first header 10 are provided with wear strips (not shown in the drawings).

In the case of the use of the first header 10 and a second header 20 almost the same width different wear strips can be provided at the lower edges of the first header 10 and at the lower edges of the second header 20. With double sweeping the milled surface 3, the wear strip of the first header 10 may have rounded edges, while the lower wear strip 34 of the second header 20 may be provided with sharp edges. In this case can with the first collecting plate 10 with reduced contact pressure against the milled surface 3 carried out a rough cleaning, while the second collecting plate 20 can work with an increased contact pressure.

The described stripping device 6 is equally applicable to a Hinterlader road milling machine, as shown in principle in Figure 6.

For this purpose, it is only necessary to provide the first collecting plate 10 and / or the fastening device 16 with corresponding recesses or passage openings 44, 50, as shown for example in Figures 7 to 9.

Such a stripping device 6 may have a support means 42 for a conveyor 40, which is provided, for example, on both sides with hooks 18 to receive a bearing pin on both sides of the conveyor 40 can. The conveyor 40 is therefore connected as shown in Figure 10 at the end facing the road milling machine about a horizontal axis hinged to the stripping device. Furthermore, the support device 42 can be pivoted about a pivoting device 46 about a substantially vertical axis in order to pivot the conveyor 40 laterally.

The fastener 16 may be raised or lowered via two piston-cylinder units 24 hinged to the gantry 12 or to the machine frame, while the first header 10 is moved up and down relative to the fastener 16 with the piston-cylinder unit 22 shown in FIG can.

Claims (17)

1. A construction machine, particularly a road milling machine (1), where milling rolls (2) of different milling widths are usable within a maximum milling width, comprising at least one first stripping blade (10) arranged behind the milling roll (2) in the traveling direction so as to be adjustable in height, said stripping blade being able to glide over the surface (3) milled or to be milled by the at least one milling roll (2),
   characterized in

   - that the first stripping blade (10) covers the maximum milling width, and

   - that a mounting means (16) for at least one second stripping blade (20) adapted to the at least one milling roll (2) respectively used, which is adjustable in height relative to the first stripping blade (10), is provided, the second stripping blade (20) being able to be positioned, by means of the mounting means (16), in a position corresponding to the milling roll (2) within the width of the first stripping blade (10).
2. The construction machine according to claim 1, characterized in that the mounting means (16) is arranged behind the first stripping blade (10) in the traveling direction.
3. The construction machine according to claim 1 or 2, characterized in that the profile shape of the second stripping blade (20) is adapted to the milling roll profile shape.
4. The construction machine according to one of claims 1 to 3, characterized in that the mounting means (16) extends over the maximum milling width and is arranged in parallel with the first stripping blade (10).
5. The construction machine according to claim 4, characterized in that the mounting means (16) is arranged at the first stripping blade (10) so as to be adjustable in height.
6. The construction machine according to claim 4, characterized in that the first stripping blade (10) is arranged at the mounting means (16) so as to be adjustable in height.
7. The construction machine according to one of claims 1 to 6, characterized in that the lower and/or lateral edges of both the second stripping blade (20) and the first stripping blade (10) comprise wear strips (34,36).
8. The construction machine according to one of claims 1 to 7, characterized in that the mounting means (16) is displaceable along a guide parallel to and/or on the first stripping blade (10).
9. The construction machine according to one of claims 1 to 8, characterized in that the second stripping blade (20) comprises, at its lower edge, at least one recess downwardly open, for the defined deposition of the milled-off material.
10. The construction machine according to one of claims 5 to 9, characterized in that the first stripping blade (10) comprises wear strips (34,36) with rounded lower edges and/or the second stripping blade (20) comprises wear edges (34,36) with sharp edges.
11. The construction machine according to one of claims 1 to 10, characterized in that the second stripping blade (20) extends over the whole width of the first stripping blade (10).
12. The construction machine according to one of claims 1 to 11, characterized in that a transporting means (40) is articulately mounted behind the milling roll (2) in traveling direction.
13. The construction machine according to claim 12, characterized in that the first stripping blade (10) and/or the mounting means (16) comprise a passage opening (44,50) for the ejection of the milled-off material onto the transporting means (40).
14. The construction machine according to one of claims 12 or 13, characterized in that the transporting means (40) is articulately connected so as to be pivoted about a horizontal as well as a substantially vertical axis.
15. The construction machine according to one of claims 13 or 14, characterized in that the lower edge of the passage opening (50) always remains at the same level relative to the transporting means (40) independent of the set milling depth.
16. A method for stripping remaining milled-off material behind a milling roll (2) of a construction machine, in particular a road milling machine, where milling rolls (2) of different milling widths are usable within a maximum milling width, by stripping the milled surface (3) by at least one first stripping blade (10) arranged behind the milling roll (2) in traveling direction so as to be adjustable in height,
    characterized in
    that for stripping the milled surface (3) at a constant or varying milling depth, a second stripping blade (20) is used which is positioned, within the width of the first stripping blade (10), corresponding to the position of the respectively used milling roll (2) by means of a mounting means (16) adjustable in height relative to the first stripping blade (10).
17. The method according to claim 16, characterized in that a first stripping blade (10) and/or a mounting means (16) with a passage opening (44,50) is used to drop the removed material onto a transporting means (40) arranged behind the milling roll (2) in traveling direction.

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