EP2653612A2 - Runner segment for an edge protector of a street milling machine and edge protector for a street milling machine - Google Patents

Abstract

The skid segment (30) has a skid section (36), on which a mounting section is formed in a direct and indirect manner. The mounting section is formed as a plug-in projection (38). A stop surface (33) is provided, which extends transverse to the central longitudinal axis of the plug-in projection, where the central longitudinal axis specifies the plug-in direction. The plug-in projection has a latch, with which the plugging movement is limited. The plug-in projection has support flanks on opposite sides. An independent claim is included for an edge protector with plug-in receptacles.

Description

The invention relates to a skid segment for edge protection of a road milling machine or the like soil cultivation machine with a skid portion to which a fixing portion is indirectly or directly formed.

Road milling machines are used in road and road construction. They serve to remove the existing road surface completely or preferably partially. Here, a milling drum is used, which is housed protected within a milling box. The milling drum is usually equipped with chisels, which engage the road surface in the substrate to be processed. At the running in the direction of the road milling machine sides of the milling box protective elements are used, which are referred to as edge protection. The edge protection covers the milling drum from the side and thus prevents access to one to the milling drum during the milling operation. On the other hand, ejection of milled material into the environment is prevented. The edge protector stands on the road surface with a lower runner so that complete coverage of the milling drum is achieved. In addition, the skid pushes on the unprocessed road surface, which is after the milling drum außerilalb the work area. Accordingly, the edge protector thus forms an abutment which prevents a breaking out of the laterally adjoining road surface during the milling process. The skid is off. Skid segments composed, which are subject to wear and therefore must be replaced after reaching their wear limit. For this purpose, the runner segments on a mounting portion with which they are screwed laterally to the edge protection. The screw heads of the skid segments are sometimes exposed to the abrasive attack of eroded material and are then buffed. They can then no longer be solved with the intended tool. Furthermore, it is possible that the connection surfaces between the edge protection and the skid segments are washed out. Then the skid segments can no longer be positioned exactly reproducible.

It is an object of the invention to provide a skid segment for edge protection which allows easy maintenance.

It is a further object of the invention to provide an edge protector of the aforementioned type which assists in easy maintenance.

The object relating to the skid segment is achieved in that the attachment section of the skid segment is formed as a plug-in approach. Thus, the runner segment can be plugged with the plug-in approach in a suitably trained plug-in receptacle of the edge protection, so that it can be easily exchanged in rough construction site operation. The plug-in lug is in the plug-in receptacle in a wear-protected area arranged so that a reproducible assignment of the skid segment is supported for edge protection.

In order to ensure an exact assignment of the individual segments segments in a simple manner, it can be provided that at least one stop surface is provided which extends transversely to the direction of insertion predetermining the central longitudinal axis of the plug-in approach. Consequently, the runner segment can be inserted with its insertion projection, that is, into the edge protector, until the stop surface defines the insertion movement.

Particularly preferably, it may be provided that the plug-in approach has a stop with which the insertion movement can be limited. The stop is thus accommodated wear-protected in the area of the plug-in extension.

The assembly can be further simplified in that the plug-in approach is provided in the region of its free end with at least one integrally formed Einführzentrierung.

If it is provided that the plug-in approach on opposite sides supporting flanks extending transversely to the direction of the runner segment, then a positive support in the main force direction can be achieved at the edge protection during operation.

Particularly preferred in this case run the support flanks parallel to each other or they converge in the insertion direction of the plug-in approach. In converging surface areas also results in a tapered geometry of the plug-in approach, which facilitates the introduction into the plug-in receptacle. According to an alternative variant of the invention, it can also be provided that the supporting flanks have surface areas, which are convex or concave. Such areas provide large erosion areas in favor of lower surface pressures.

During operation, it can also happen that the road milling machine is moved transversely to the main direction of travel. In order to maintain a reliable fixation of the skid segments in this operating state, it can be provided that the plug approach has on opposite sides in the running direction of the skid segment extending side surfaces. With these side surfaces, the runner segment can be positively supported on corresponding mating surfaces of the edge protector.

Road milling machines are often moved opposite to the main direction of travel during operation. As a result, loading situations arise at the skid segment, which deviate from those when operating in the main direction of travel. In order to be able to achieve a load-optimized design of the runner segment, it is provided according to a variant of the invention that the socket has an asymmetrical geometry to a running through the central longitudinal axis of the plug-in approach and extending transversely to the direction of the runner segment transverse center transverse plane.

According to a conceivable alternative of the invention, it may be provided that at least one projecting in the direction of projection is provided which protrudes in or opposite to the direction over the plug-in approach. The projection serves to bridge between standing edge protection areas between the individual segments segments and thus enables the most distance-free skid training.

A compact design of the skid segment is supported by the fact that directly or indirectly connected to the plug-in approach, which carries the runner section.

It can be provided in particular that the runner section has a greater width than the approach. With such a cross-section offset, a labyrinth-like overlap of entry into the plug-in receptacle can be achieved. As a result, the entry of dirt is reduced in the socket.

A high wear resistance of the skid segment can be achieved by applying a hard material element, for example a build-up weld, a cemented carbide element, a hard material coating or the like, to the runner section.

A particularly preferred variant of the invention is such that a clamping element is used which has one or more elastic functional parts. With the clamping element, the runner segment can be clamped in a simple manner with the edge protection, wherein the compound can be easily joined and released due to the elasticity of the functional parts. Particularly preferably, the clamping element is held in the region of the plug-in approach, so that it is housed protected from wear.

A particularly simple assignment of the clamping element to Kufensegment can be achieved if the plug has a receptacle in the form of a recess or recess into which the clamping element is introduced. In particular, the elasticity of the clamping element can also be utilized in order to achieve a tension in the receptacle, so that additional fastening measures can be dispensed with.

The edge protection related object of the invention for a road milling machine or the like tillage machine with an edge which is designed to receive Kufensegmenten is achieved in that the edge has plug-in receptacles for receiving the Kufensegmente. The skid segments can be easily inserted into the plug-in receptacles, preferably without tools. In the plug-in receptacles of a plug-in segment of the runner segment is housed protected against wear and the runner segments can be reproducibly inserted into the plug receptacles. As a result, the maintenance of the edge protection is significantly simplified.

Particularly preferably, the plug receptacles are pocket-shaped and open to the underside of the edge protector. A simple production of the edge protection is possible if it is provided that the edge has comb-like recesses which are at least partially closed to form the receptacles with mutually parallel spaced walls.

Figur 1

in perspektivischer Darstellung einen Kantenschutz für eine Straßenfräsmaschine;

Figur 2

ein in Figur 1 mit II-II gekennzeichnetes Schnittdetail;

Figur 3

ein in Figur 1 mit III-III gekennzeichnetes Schnittdetail;

Figur 4

in perspektivischer Darstellung eine erste Variante eines Kufensegmentes;

Figur 5

eine Schnittdarstellung des Kufensegmentes gemäß Figur 4 längs des darin mit V-V gekennzeichneten Schnittverlaufes,

Figur 6

in perspektivischer Darstellung eine zweite Ausgestaltungsvariante eines Kufensegmentes;

Figur 7

das Kufensegment gemäß Figur 6 in Seitenansicht;

Figur 8

eine Dritte Ausgestaltungsvariante eines Kufensegmentes in perspektivischer Darstellung; und

Figur 9

einen Schnittverlauf durch die mit IX-IX gekennzeichnete Mittelquerebene des Kufensegmentes gemäß Figur 8.

The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawings. Show it:

FIG. 1

in perspective view of an edge protection for a road milling machine;

FIG. 2

a in FIG. 1 Section detail marked II-II;

FIG. 3

a in FIG. 1 sectional detail marked III-III;

FIG. 4

in perspective view a first variant of a skid segment;

FIG. 5

a sectional view of the skid segment according to FIG. 4 along the section marked VV in it,

FIG. 6

in a perspective view of a second embodiment variant of a skid segment;

FIG. 7

the skid segment according to FIG. 6 in side view;

FIG. 8

a third embodiment variant of a skid segment in perspective view; and

FIG. 9

a section through the designated IX-IX median transverse plane of the skid segment according to FIG. 8 ,

FIG. 1 shows an edge protector 10 for a road milling machine with a plate-like base part 10.1. This base part 10.1 forms a fastening side 11 for coupling to the road milling machine in the region of a milling box. Opposite the attachment side 11, the edge protector 10 has an edge 12. This edge 12 is provided with recesses, which are arranged spaced from each other via webs 13, so that a comb-like geometry results. In the gaps formed between the webs 13 walls 16, consisting of sheet metal, are used. In each case, two walls 16 are used in each recess, which are arranged spaced apart from each other in parallel. In this way, results between the walls 16 and the webs 13, a plug-in receptacle 14, as the FIGS. 2 and 3 illustrate. The walls 16 are welded by welds 17 with the edge 12 of the edge protector 10. In this way, a plurality of mutually spaced evenly spaced plug receptacles 14 are created. These plug receptacles 14 are used for Recording of skid segments 30, as exemplified closer in the FIGS. 4 to 9 are shown. The skid segments 30 are constructed substantially similarly in the basic structure. They have a skid portion 36 which is covered on its underside with a hard material element 37. As a hard material element 37 may, for example, be used an order consisting of metal powder. It is also conceivable that is applied to the runner section hard metal elements or a Panzerschweißerung. At the runner portion 36, a projection 31 is formed. In this case, the lug 31 has a smaller width than the runner section 36 transversely to the running direction L running in the main movement direction of the road milling machine. In this way, on both sides of the approach 31 paragraph-like sections that form contact surfaces 36.1. The projection 31 has two projections 32 projecting on both sides in the running direction L via a plug projection 38. The projections 32 form stop surfaces 33, which pass over rounding transitions 34 in side walls 35.

The plug-in approach 38 is limited by two extending in the direction L side surfaces 38.3. The side surfaces 38.3 are parallel to each other. The side surfaces 38.3 go without offset into the projection 31.

As the embodiment variant according to the FIGS. 4 and 5 shows, the insertion projection 38 has two supporting flanks 38.2 which are perpendicular to the side surfaces 38.3 and which are mutually parallel spaced. Each supporting flanks 38.2 passes via an insertion centering 38.1 into an end face 38.4.

In the region of the plug-in extension 38, a clamping element 40 is attached. The clamping element 40 has elastic functional parts 42, which are formed predominantly as lamellae, as this FIG. 5 lets recognize. It is also conceivable to use a clamping element which is block-shaped and formed from an elastic material, in which case a part of this block or the whole block forms the functional part with elastic properties. The lamellar functional parts 42 are employed in an arrow-shaped manner with respect to each other and inclined in the direction of the insertion axis defining the central longitudinal axis M of the plug-in extension. As FIG. 5 can recognize, the clamping element 40, a base member 41, to which the functional parts 42 are integrally formed. In the plug-in projection 38 a pocket-shaped receptacle 39 is recessed in the form of a recess. The clamping element 40 is inserted with its base part 41 in this receptacle 39, wherein it is supported with the base part 41 on a bottom 39.1 of the receptacle. In the present case, the clamping element 40 is designed such that also the base part 41 has elastic properties. It can then be pressed with excess into the receptacle 39, so that no additional fastening means are required. Alternatively, the clamping element 40 may also be glued, for example, in the receptacle 39. In the assembled state, the functional parts 42 are slightly above the side surface 38.3, like this FIG. 5 lets recognize. The supernatant is in FIG. 5 marked with a. For mounting in the FIGS. 4 and 5 shown skid segment 30 in the edge protector 10 according to FIG. 1 the skid segment 30 is first recognized with its plug-in approach 38 to the downwardly open receptacle 14. The Einführzentrierungen thread 38.1 at the adjacent webs 13, so that the assembly is facilitated. Then, the runner segment 30 is inserted with its web extension 30 in the direction of the central longitudinal axis M in the plug receptacle 14. This can first be done powerless or with little effort until the functional parts 42 come on the inner sides of the walls 16 for engagement. When inserting the runner segment 30, the functional parts 42 must be elastically deformed. The insertion movement of the skid segment 30 into the plug-in receptacle 14 is limited by means of the abutment surfaces 33 of the protrusions 32. These attach themselves to the end faces 15 of the webs 13. In the assembled state, the contact surface 36.1 of the runner section 36 is at a short distance from a front-side counter-surface 19 of the walls 16, as this FIG. 3 lets recognize. The face 38.4 is also at a distance from an opposite bottom surface of the plug receptacle 14. Alternatively, the assignment can be selected such that the runner segment 30 with the end face 38.4 on a Bottom surface of the socket 14 is supported. Accordingly, then the stop surface 33 is at a small distance to the front side of the webs 13. In this case, the stop geometry between the runner segment 30 and the plug receptacle 14 is protected in the plug receptacle 14 housed. The clamping element 40 may alternatively also be accommodated on the base part 10.1, in particular protected in the plug-in receptacle 14.

During operation, the runner segments 30 with their hard material elements 37 drag over the substrate and are continuously worn away. After reaching the wear limit, the runner segments 30 can be easily replaced. For disassembly window-like openings 18 are provided in the outside walls 16. In these openings 18, a tool 20 can be adjusted with a Austreibdorn 21. In this case, the Austreibdorn 21 then supported on the contact surface 36.1 of the runner portion 36. By means of a hammer blow, a expelling force can then be introduced vertically downwards into the skid segment 30. In this case, the frictional connection between the inside of the wall 16 and the clamping element 14 is then separated by pushing out the runner segment 30. Subsequently, the runner segment 30 can be completely pulled out of the plug receptacle 14 and replaced with a new runner segment 30.

In FIG. 6 an alternative embodiment variant of a skid segment 30 is shown. The design of this skid segment 30 essentially corresponds to the skid segment 30 according to FIGS FIGS. 4 and 5 , so that reference can be made to avoid repetition of the above statements. In contrast to the skid segment 30 according to FIGS FIGS. 4 and 5 the support flanks 38.2 are not parallel to each other, but V-shaped and converge towards the free end of the plug-in projection 38. Accordingly, the webs 13 are preferably designed such that they adapted angular stop surface areas form, which diverge in the plug-in receptacle 14 in the direction of the lower-side opening. This has the advantage that already after penetration of a small expulsion movement in the direction of the central longitudinal axis M, the support flanks 38.2 out of engagement with the corresponding mating surfaces of the webs 13 reach, so here when expelling no frictional forces arise.

As FIG. 7 shows, are in the plug-in projection 38 two pocket-shaped receptacles 39 according to the embodiment according to the FIGS. 4 and 5 brought in. The receptacles 39 are mutually offset in the direction of L and the elastic functional parts 42 of the clamping elements 40 are on both sides of the plug-in projection 38 before. In this way, a double-sided jamming of the plug-in projection 38 is achieved in the socket 14. Of course, this type of clamping is possible with all the skid segments 30. In contrast to the skid segment 30 according to FIGS FIGS. 4 and 5 the skid portion 36 and thus the hard material element 37 is convex. According to FIG. 1 this segment segment 30, for example, advantageously arranged at the front end of the edge protector 10 and thus forms a casserole geometry.

In the FIGS. 8 and 9 a further embodiment variant of a skid segment 30 is shown. Again, reference is made to avoid repetition with respect to the same reference numerals to the above statements. In the following, only the differences will be explained. As FIG. 8 shows, the plug-in approach 38 on two opposite support flanks 38.2. These first have surface areas which are connected to the stop surfaces 33 and which are at an angle to each other. These surface areas converge towards the free end of the plug-in extension 38. Following the converging surface areas, convex surface areas of the supporting flank 38.2 are connected without offset. These convex portions of the support flanks 38.2 go flush over a likewise convex Insertion centering into each other. Even with this geometry, a precise and simple assignment of the plug-in projection 38 to corresponding mating surfaces of the webs 13 is possible.

The clamping element 40 has, as this FIG. 9 shows, a base member 41, on both sides of the lamellar elastic functional parts 42 are connected. The elastic functional parts 42 are again employed in an arrow-shaped manner to facilitate the insertion of the insertion projection 38 in the plug-in receptacle 14 and protrude slightly on both sides over the side surfaces 38.3 of the insertion projection 38. The receptacle 39 is excluded as a breakthrough from the insertion projection 38. When inserting the plug-in extension 38 into the plug-in receptacle 14 of the edge protector 10, the functional parts 42 slide on the insides of the two walls 16 and are deformed here.

Claims (20)

Skid segment for an edge protector (10) of a road milling machine or the like. Soil cultivation machines with a runner section (36) to which a fixing section is indirectly or directly formed,
characterized,
that the attachment portion is formed as a plug-in extension (38). Skid segment according to claim 1,
characterized,
in that at least one abutment surface (33) is provided, which extends transversely to the central longitudinal axis of the insertion projection (38) which predetermines the plugging direction. Landing segment according to one of claims 1 and 2,
characterized,
in that the insertion projection (38) has a stop with which the insertion movement can be limited. Skid segment according to one of claims 1 to 3,
characterized,
in that the insertion projection (38) is provided in the region of its free end with at least one integrally formed insertion centering (38.1). Skid segment according to one of claims 1 to 4,
characterized,
in that the insertion projection (38) has support flanks (38.2) on opposite sides which extend transversely to the running direction (L) of the runner segment (30). Skid segment according to claim 5,
characterized,
that the support flanks (38.2) have surface areas which converge parallel to each other or in the insertion direction of the insertion projection (38). Skid segment according to claim 5 or 6,
characterized,
that the support flanks (38.2) surface regions which are formed convex or concave. Landing segment according to one of claims 1 to 7,
characterized,
that the plug-in lug (38) has on opposite sides in the running direction (L) of the runner segment (30) extending side surfaces (38.3). Skid segment according to one of claims 1 to 8,
characterized,
comprises that the plug-in projection (38) to a, through the central longitudinal axis (M) of the plug-in projection extending and extending transversely to the running direction (L) of the blade segment (30) extending central transverse plane, a non-symmetrical geometry. Skid segment according to one of claims 1 to 9,
characterized,
in that at least one protrusion (32) projecting in the direction of travel (L) is provided, which protrudes beyond the insertion projection (38) in or opposite to the running direction (L). Skid segment according to one of claims 1 to 10,
characterized,
that on the plug-in projection (38) directly or indirectly a projection (31) is connected, which carries the runner portion (36). Skid segment according to claim 10,
characterized,
that the runner portion (36) has a greater width than the projection (31). Skid segment according to one of claims 1 to 12,
characterized,
that the runner portion (36) comprises an adhesive member (37), eg., a weld overlay, a Hartmetalleiement, an adhesive coating or the like.. Landing segment according to one of claims 1 to 13,
characterized,
in that a clamping element (40) is used which has one or more elastic functional parts (42). Skid segment according to claim 14,
characterized,
that the clamping element (40) is held in the region of the plug-in projection (38). Landing segment according to one of claims 14 or 15,
characterized,
in that the insertion projection (38) has a receptacle (39) in the form of a recess or recess into which the clamping element (40) is introduced. Edge protection (10) for a road milling machine or the like. Tillage machine with a rim (12) designed to receive runner segments (30),
characterized,
that comprises the edge (12) plug-in receptacles (14) for receiving the runner segments (30). Edge protection according to claim 17,
characterized,
that the plug-in receptacles (14) is formed bag-shaped and the underside of the edge protector (10) are open. Edge protection according to one of claims 17 or 18,
characterized,
in that the edge (12) has comb-like recesses which are closed at least in regions to form the receptacles with mutually parallel spaced walls (18). Edge protection according to one of Claims 17 to 19, having one or more segmental segments (30) according to one of Claims 1 to 16.

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