EP3362603A1

EP3362603A1 - Skid segment for an edge protection on a road milling machine and edge protection for a road milling machine

Info

Publication number: EP3362603A1
Application number: EP17800513.8A
Authority: EP
Inventors: Andreas Salz; Martin Lenz; Cyrus Barimani
Original assignee: Wirtgen GmbH
Current assignee: Wirtgen GmbH
Priority date: 2016-12-07
Filing date: 2017-11-16
Publication date: 2018-08-22
Anticipated expiration: 2037-11-16
Also published as: TW201821676A; US11339552B2; DE102016123662A1; KR20190067878A; CN108166363A; WO2018104015A1; CN207739121U; AU2017372774A1; EP3362603B1; CN108166363B; SG11201900998YA; US20200080280A1; TWI647358B; RU2726788C1; AU2017372774B2

Abstract

The invention relates to a skid segment (10) for an edge protection (5) on a road road milling machine or similar ground processing machine having a base part (11) and at least one first skid section (12) mounted thereupon, wherein the first skid section (12), in a first operating position of the base part (11), can be directed in direction (A) onto the surface of the road or ground. At least one second skid section (13) is mounted on the base part (11), which, in a second operating position of the base part (11), can be directed in direction (A) onto the surface of the road or ground. The invention further relates to an edge protection for a road milling machine or similar ground processing machine having skid segments of this kind, wherein the edge protection has an edge which is designed to receive at least one skid segment.

Description

Skid segment for edge protection of a road milling machine and edge protection for a road milling machine

The invention relates to a skid segment for edge protection of a road milling machine or the like. Soil cultivation machine with a base part and at least one first runner section attached thereto, wherein the first runner section in a first operating position of the base part in the direction of the road or ground surface is aligned.

Furthermore, the invention relates to an edge protection for a road milling machine or the like. Tillage machine with at least one such Kufensegment, wherein the edge protection has an edge which is formed for receiving at least one runner segment.

Road milling machines are used in road and road construction. They serve to completely or partially remove the existing road surface. This can be a milling drum 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 travel or feed 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 on the one hand access 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 is hydraulically pressed onto the untreated road surface, which is located after the milling roller outside the work area to ensure a clean cutting edge and to avoid flounder-like outbreaks.

From US 2009/0185859 A1 a road milling machine with such edge protection is known. A one-piece skid which extends in the feed direction forms the skid, which is detachably and thus exchangeably attached to the edge guard by means of screw connections.

From DE 10 2012 103 440 A1 also a road milling machine with an edge protection and a skid segment for such edge protection is known. The skid this road milling machine is composed of several segments segments, which are subject to a certain wear and therefore must be replaced after reaching their wear limit. For this purpose, the landing gear segment has a plug-in approach, which can be plugged into a plug-in receptacle of the edge protector, so that it can easily be exchanged in rough construction site operation when the wear limit is reached.

The known runner segments are completely replaced after appropriate wear and then disposed of or recycled or processed. The time in which the known runner segments can be used without interruption, ie the service life of the runner segments, is limited by the occurrence of significant signs of wear, which then require a complete replacement of the runner segments. The worn skid segments are then usually disposed of or recycled or processed. New skid segments must be replaced after only one lifetime. The use of material to be replaced segment segments is accordingly high over the life of the road milling machine.

It is an object of the invention to provide a skid segment for edge protection of a road milling machine or the like tillage machine, which allows extended compared to the conventional skid segments service life, whereby the required material use is reduced and the maintenance is simplified.

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

The object of the invention is achieved by a skid segment for edge protection according to the features of patent claim 1 and by an edge protector according to the features of patent claim 16. Advantageous developments are each described in the subclaims.

Accordingly, at least one second runner section is attached to the base part of the runner segment, which can be aligned in a second operating position of the base part in the direction of the road or ground surface. Accordingly, in the first operating position, the first runner section comes into direct contact with the road or ground surface and experiences the resulting abrasion during operation of the road milling or soil working machine. When the first runner section has reached its wear limit, the runner segment is brought from the first to the second operating position, in which the second runner section directly with the Road or ground surface comes into contact. Only after wear of the second runner section thus the runner segment must be completely replaced. The service life of the runner segment is thus significantly extended and only after twice the life of new material must be used. This also simplifies the maintenance, since a conversion from the first to the second operating position is less complicated than a complete replacement of the runner segment.

It is also conceivable that attached to the base part a total of three or four runner sections and accordingly three or four different operating positions are possible. With such a skid segment, the useful life would be further extended and the maintenance effort would be further simplified.

According to a basic idea of the invention, at least one first runner section can be attached to a first side of the base part in its lower region. The base part may have a second side facing away from the first side, which forms a fastening side with at least one support surface. Thus, the skid segment in the first operating position with the second side of the base part, for example, at the bottom of an edge protection for a road milling or - tillage machine in a simple way in investment and fasten there, the first runner portion at the bottom of the opposite first side of the Base part in the first operating position can be brought into direct contact with the road or ground surface and thus forms at least part of a skid.

According to a further idea of the invention, the at least one second runner section may be attached to the first side of the base part in its upper region, wherein the first and second runner sections together with the base part form a profile with a substantially U-shaped cross section. The second runner section at the upper region of the first side of the base part can thus by converting the runner segment from the first operating position into a 180 ° For example, be brought about the longitudinal axis of the pivot axis pivoted second operating position in direct contact with the road or ground surface, the second side is still in contact, for example, with the lower edge region of the edge protector. Alternatively, pivoting from the first to the second operating position is also possible by 180 ° about a transverse axis of the runner segment. Further alternatively, the pivoting about any pivot axis is possible, in which the skid segment is brought from the first to the second operating position, wherein the skid segment in the second operating position with respect to the first operating position is turned twisted mountable. With this structure, it is possible in a simple manner to bring the skid segment from the first to a second operating position and thus to extend the service life of the skid segment.

In order to increase the stiffness of the runner segment, between the first runner section and the second runner section. alternatively or additionally be arranged at an angle between the first runner portion and the base part, and further alternatively or additionally at an angle between the second runner portion and the base part at least one stiffening strut. In addition, the first and second runner portions projecting on the first side of the base member, in cooperation with the reinforcing struts, protect fasteners therebetween, such as bolt heads or nuts, from excessive wear or breakage of force, e.g. at curbs.

In order to enable a particularly simple sliding of the runner segment on the road or ground surface, the first runner section and the second runner section at least at the first direction pointing in the feed direction can be bent towards each other and form the first and second runner sections together with the base part a tapered first end. The skid segment can thus form as part of the skid one away from the ground surface, upwardly bent tip tip, for example, slides on gravel or rock lumps and thus a Blocking the feed prevented. Two eg on both sides of the edge protection of a milling box mounted skid segments with tapered first end are not only brought by pivoting 180 ° from the first to the second operating position, but also exchanged with the identical, mounted on the opposite side of the milling box segment segment. Thus, both runner sections can be worn alternately to extend the useful life.

In a particularly advantageous embodiment, the runner segment may be formed symmetrically to the longitudinal longitudinal center plane. With this measure, the skid segment can be brought by simple pivoting 180 °, for example, about the longitudinal axis or a transverse axis as the pivot axis of the first in a second operating position.

According to a further preferred embodiment, at least one first runner section can be attached to the second side of the base part facing away from the first side in its lower region. The second side of the base part can form a fastening side with at least one support surface in the first operating position. Thus, the skid segment in the first operating position with the second side of the base part, for example, at the lower edge region of an edge protector for a road milling or - tillage machine in a simple way in investment and fasten, where the first runner section at the bottom of the second side of the base part in the first operating position, the edge protection encompasses the underside. Thus, the first runner portion effectively protects the edge guard from underside wear.

The at least one second runner section may be mounted in the upper region of the first side, wherein the first and second runner sections together with the base part form a profile with a substantially Z-shaped cross section. In this embodiment, the skid segment can be easily by implementing or

For example, pivoting about the longitudinal axis or a transverse axis as Move the pivot axis from the first operating position to the second operating position.

In a development according to the invention, in each case at least one stiffening strut can be arranged at an angle between the first runner section and the base part and / or at an angle between the second runner section and the base part. This stiffening struts are also used in the Kufensegment with Z-shaped cross-section of the stiffener and protect, for example, attached to the base screw heads or nuts from abrasion or breakage by protruding over the first and second side of the base.

In order to facilitate sliding on the road or ground surface in a scoop segment having a Z-shaped cross section, the second runner portion may be bent toward the first runner portion at the first end pointing in the advancing direction and the first runner portion may be at the second end facing the advancing direction run bent the second runner section. In this case, the base part may preferably be formed following the course of the second and first runner section at the first and second ends.

In a particularly advantageous embodiment, the geometric body of the runner segment can be formed point-symmetrical to the body center. By this shaping, the runner segment can be brought by simple pivoting from the first to a second operating position, wherein in each case the first or second runner portion is part of the slide rail.

In a particularly rigid and easily produced embodiment, the base part may form a profile with a rectangular cross section that extends at least in sections along the edge protector.

For stable and detachable attachment of the skid segment to the edge protection can in Base part to be formed at least one screw. In this screw mounting screws can be inserted, which in turn are secured to the edge protection.

In order to mount the skid segment with respect to the edge protection at a variable height, the screw receptacle can be designed as a slot extending substantially perpendicularly or transversely to the central longitudinal plane. By simply adjusting the height along the slot, the position of the runner segment can be adjusted to the height of the edge guard above the road or ground surface.

According to yet another preferred embodiment, the base part may have two laterally drawn-in regions which in each case merge into two inwardly inclined partial regions from the first runner section in the direction of the second runner section and from the second runner section in the direction of the first runner section. The two laterally retracted areas are each substantially V-shaped and serve an alternative or additional attachment to the edge protection. For plug-in receptacles are provided on the edge protection, which are in the two different operating positions in each case with the inwardly inclined portions of the laterally retracted areas engaged and form a simple to be solved plug connection for the runner segment.

Between the respective two inwardly inclined partial regions, two essentially parallel partial regions can be formed. These parallel portions are in the assembly or disassembly process with the plug-in receptacles out of engagement and thus facilitate the change or the implementation of the runner segment.

According to the invention, the edge of the edge protector has corresponding attachment receptacles for receiving the at least one runner segment. The fastening receptacles can be substantially along the edge of the Edge protector may be arranged to receive a plurality of Kufensegmenten, which together form a slide rail.

According to an advantageous embodiment, the fastening receptacles for the runner segments may have at least one screw receptacle. In order to form a releasable attachment of the runner segments to the edge protection, fastening screws can be introduced into these screw receptacles, which are introduced into the base parts of the runner segments trained screw receptacles.

In order to provide a flat contact surface between the edge protector and an attached Kufensegment with Z-shaped cross section, the mounting receptacles for the runner segments may have at least one receptacle for the stiffening struts of the runner segments.

In order to provide effective wear protection of the edge of the edge protection, the runner segments with Z-shaped cross-section can be attached to the edge protection, that in the first operating position of the first runner section covers the edge of the edge protection on the underside and in the second operating position, the second runner section the edge of Covering the edge protection on the underside.

In order to provide an effective wear protection of the edge of the edge protection, projecting edge segments with U-shaped cross section in the first operating position of the first runner portion in the direction of the road or ground surface over the edge of the edge protector. In the second operating position, the second skid portion may protrude toward the road or ground surface beyond the edge of the edge guard.

According to a further embodiment, the fastening receptacles for the runner segments may have at least one plug-in receptacle for the form-fitting retention of at least one runner segment. These plugins can be in the two different operating positions of the Kufensegmente each with the inwardly inclined portions of the laterally retracted areas are engaged and form an easy-to-solve connector.

Advantageously, the plug-in receptacles may have two clamping elements spaced from each other, which are effective on both sides of the inwardly inclined portions of the base part. The clamping elements come in the assembly of the runner segments with the inwardly inclined portions of the laterally retracted areas into engagement, whereby a stable, yet releasable connection is created.

A secure fit of the edge segments on the edge protection can be achieved in that the clamping elements have substantially parallel to the inwardly inclined portions of the base part extending stop surfaces and the base portion of the runner segment at least partially embracing undercuts.

The invention will be explained in more detail with reference to embodiments shown in the drawings.

Show it:

1 shows a schematic and perspective side view of an embodiment of an edge protector of the milling box of a road milling machine.

FIG. 2 shows a schematic and perspective side view of that shown in FIG

Edge protection with four at its lower edge arranged in series Kufensegmenten according to a first embodiment;

FIG. 3 shows a schematic sectional view of the region of a fastening receptacle of a runner segment shown in FIG. 2 along the section line III-III; FIG. 4 is a schematic and perspective side view of a runner segment shown in FIG. 2 with runner sections running parallel to one another;

Figure 5 in a schematic front view against the feed direction in the

Figure 4 shown blade segment;

FIG. 6 is a schematic and perspective side view of the runner segment shown in FIG. 1 with a tapered first end;

FIG. 7 is a schematic sectional view of the runner segment shown in FIG. 6 along the section line VII-VII;

Figure 8 is a schematic and perspective side view of the edge protection shown in Figure 1 with four arranged at its lower edge in series Kufensegmenten according to a second embodiment.

FIG. 9 is a schematic sectional view of the region of a fastening receptacle of a runner segment shown in FIG. 8 along the section line IX - IX;

Figure 10 in a schematic and perspective side view of a blade segment shown in Figure 8 with mutually parallel runner sections;

Figure 1 1 in a schematic front view against the feed direction in the

Figure 10 shown skid segment;

FIG. 12 is a schematic and perspective side view of the runner segment shown in FIG. 8 with curved runner sections; FIG. 13 is a schematic front view, opposite the direction of advance, of the runner segment shown in FIG. 12;

Figure 14 is a schematic side view of the edge protector shown in Figure 1 with two arranged at its lower edge in series Kufensegmenten according to a third embodiment.

FIG. 15 is a schematic sectional view of a segment of the blade shown in FIG. 14 along the section line XV-XV;

FIG. 16 is a schematic sectional view of a segment of the blade shown in FIG. 14 along the section line XVI-XVI;

FIG. 17 is a schematic and perspective side view of a runner segment shown in FIG. 14;

Figure 18 in a schematic front view opposite to the feed direction in the

Figure 17 shown skid segment;

Figure 19 in a schematic and perspective side view an enlarged

Part of the edge protector shown in Figure 14;

FIG. 20 shows a schematic and perspective side view of the edge protector shown in FIG. 14 with disassembled runner segments; and

Figure 21 in a schematic and perspective side view and in an enlarged

Detail view DA the edge protection shown in FIG.

Figure 1 shows a schematic and perspective side view of a Embodiment of a plate-like edge protection 5 of only one indicated in Figure 1 milling box 6 a street milling machine. The edge protection 5 has an inner side 8 for coupling to the road milling machine in the region of the milling box and an outer side 7. In the lower area, the edge protection 5 has an edge 70. The edge protector 5 is elongated in the feed direction V of the road milling machine, wherein the edge 70 extends in the feed direction V and substantially parallel to a road or ground surface (not shown).

FIG. 2 shows, in a schematic and perspective side view, the edge protector 5 shown in FIG. 1 with four edge segments 10 and 20 arranged in series at its lower edge 70 according to a first embodiment. The bevel segment 20 arranged at the front end of the edge 70 in the feed direction V has a tapered front end, whereas the three runner segments 10 adjoining the feed direction V are substantially straight. The skid segments 10 and 20 are mounted in a first operating position.

The edge 70 has a plurality of along the edge 70 and spaced therefrom in the direction B mounting receptacles, of which only a fastening receptacle for receiving one of the runner segments 10 in the figure 1 is shown. The fastening receptacle for this blade segment 10 has a screw receptacle 71.

The skid segment 10 will be described in more detail below with reference to FIGS. 3, 4 and 5.

FIG. 3 shows, in a schematic sectional view, the region of the fastening receptacle of the runner segment 10 shown in FIG. 2 along the section line III-III.

In FIG. 3, the runner segment 10 is mounted in a first operating position shown. The skid segment 10 has a cross-sectionally substantially rectangular base part 1 1. On the base part 1 1, a first runner portion 12 and the upper side a second runner portion 13 is arranged on the underside, which protrude at right angles to the first left side of the base part 1 1 in FIG. The base part 1 1 is integrally formed with the first and second skid sections 12 and 13 of a metal, preferably cast steel. The underside of the first runner portion 12 and the top of the second runner portion 13 are substantially planar.

The base part 1 1 has a second side 16 facing away from the first side 14, which forms a fastening side with at least one support surface independently of the operating position. With the second side 16, the base part 1 1 abuts the edge 70 of the edge protector 5 and is mounted on this. In the first operating position shown in FIG. 3, the first runner section 12 protrudes in the direction A onto the road or ground surface beyond the edge 70 of the edge protector 5.

In the base part 1 1, a screw receptacle 19 is formed in the region between the first and the second skid portion, which is introduced as a bore with drilling direction substantially parallel to the central longitudinal plane MLE in the base part 1 1. The screw receptacle 19 is formed as an elongated hole, which in turn extends substantially perpendicular to the central longitudinal plane MLE or transversely thereto. At the edge 70 of the edge protector 5 and spaced therefrom in the direction B, a screw receptacle 71 of the edge protector 5 aligned with the screw receptacle 19 of the base part 11 is formed. A fixing screw

76 is inserted through the two screw receptacle 71 and 19 from the inside 8 of the edge protector 5 and on the first side 14 of the base part with a nut

77 secured. A washer 78 is inserted between the base part 1 1 and the nut 77.

The skid segment 10 can also be mounted in a second operating position (not shown). In the second operating position, the skid segment 10 is opposite the first operating position shown in Figure 3 rotated by 180 ° or mounted on an envelope. As a result, in the second operating position, the first runner section 12 points upward in the direction B, whereas the second runner section 13 points downward in the direction A. Thus, in the second operating position, the second runner section 13 projects in the direction A onto the road or ground surface beyond the edge 70 of the edge protector 5.

FIG. 4 shows, in a schematic and perspective side view, a runner segment 10 shown in FIG. 2 with first and second runner sections 12 and 13 running parallel to one another.

The first skid portion 12 attached to the first side 14 of the base part 11 at the lower region 15 thereof is aligned in the direction of the first operating position shown in FIG. 4 in the direction A on the road or ground surface. The attached to the first side 14 of the base member 1 1 at its upper portion 17 second skid section 13 is oriented in the orientation shown in Figure 4 of the first operating position in the direction B from the road or ground surface groundbreaking. In the second operating position, not shown in FIG. 4, the second runner section 13 would be aligned in the direction A on the road or ground surface.

At the skid segment 10 between the first runner portion 12 and the second skid portion 13 two spaced apart in the feed direction V stiffening struts 18 are arranged, which extends senkreicht to the first and second skid sections 12 and 13. The stiffening struts 18 protrude at the same height H with respect to the base part 1 1 as well as the first and second runners section 12 and 13 protrude relative to the base part 1 1. The stiffening struts 18 are spaced from the two ends of the runner segment 10 in the feed direction V. At both ends 1 and 2 of the runner segment 10, the first runner section 12 and the second runner section 13 are perpendicular to Feed direction V bevelled formed.

On both sides of the stiffening struts 18 a total of four in the feed direction V spaced screw receptacles 19 in the base part 1 1 are formed. The screw receptacles 19 are formed as extending substantially perpendicular to the extending longitudinally longitudinal center plane MLE of the runner segment 10 elongated holes.

FIG. 5 shows in a schematic front view, opposite to the feed direction V, the runner segment 10 shown in FIG. 4, which is formed symmetrically to the central longitudinal plane MLE. On the first side 14 of the base part 11 of the runner segment 10, the first runner section 12 is mounted in its lower region 15 and the second runner section 13 is mounted in its upper region 17. The first and second skid portions 12 and 13 together with the base part 1 1 form a profile with a substantially U-shaped cross-section. The base part 1 1 forms a profile which extends along the edge protection 5 and has a rectangular cross section.

FIG. 6 shows, in a schematic and perspective side view, the runner segment 20 shown in FIG. 1 with a tapered first end 1.

The first skid portion 22 attached to the first side 24 of the base member 21 at the lower portion 25 thereof is oriented toward the road or ground surface in the direction A in the orientation of the first operating position shown in FIG. The second runner section 23 attached to the first side 24 of the base part 21 at its upper region 27 is oriented in a direction pointing away from the road or ground surface in the direction B in the orientation of the first operating position shown in FIG. In the second operating position, not shown in FIG. 6, the second runner section 23 would be aligned in the direction A on the road or ground surface. The first runner section 22 and the second runner section 23 run bent towards one another at the first end 1 pointing in the feed direction V and together with the base part 21 form a tapered first end 1. The section of the second runner section 23 in the region of the second end 2 extends parallel to the section of the first runner section 22 in the region of the second end 2. The shape of the base part 21 follows the converging course of the first and second runner sections 22 and 23.

At the skid segment 20, two stiffening struts 28, which are spaced apart from one another in the feed direction V, are arranged between the first runner section 22 and the second runner section 23 and extend substantially perpendicular to the mutually parallel sections of the first and second runner sections 22 and 23. The stiffening struts 28 protrude at the same height H from the base part 21 as the first and second runner sections 22 and 23 protrude from the base part 21. The arranged in the region of the front tapered first end 1 stiffening strut 28 is spaced from the first end 1 in the feed direction V. The arranged at the rear second end 2 of the runner segment 20 stiffening strut 28 terminates at the end.

On both sides of the front stiffening strut 28 two spaced apart in the feed direction V screw receptacles 29 are formed in the base part 21, and a third screw receptacles 29 is formed near the rear stiffening strut 28. The screw receptacles 29 are introduced as bores with drilling direction substantially parallel to the central longitudinal plane MLE in the base part 21. The screw receptacles 29 are in turn formed as extending substantially perpendicular to the longitudinal longitudinal center longitudinal plane MLE of the skid segment 20 ersteckende slots.

FIG. 7 shows, in a schematic sectional view, the skid segment 20 shown in FIG. 6 along the section line VII-VII. The skid segment 20 is formed symmetrically to the central longitudinal plane MLE. At the first side 24 of the base part 21 of the Skid segment 20 is mounted in the lower region 25 of the first runner portion 22 and in the upper region 27 of the second runner portion 23. The first and second runner sections 22 and 23 together with the base part 21 form a profile in the section area with a substantially U-shaped cross section. The base part 21 forms a profile which extends along the edge protector 5 and has a rectangular cross section.

FIG. 8 shows, in a schematic and perspective side view, the edge protector 5 shown in FIG. 1 with four runner segments 30 and 40 arranged in series at its lower edge according to a second embodiment. The bevel segment 40 arranged at the front end of the edge 70 in the feed direction V has a tapered front end, whereas the three runner segments 30 adjoining the feed direction V are substantially straight. The skid segments 30 and 40 are mounted in a first operating position.

The edge protector 5 has a plurality of fastening receptacles spaced along the edge 70 and away from it in the direction B, of which only one fastening receptacle for receiving one of the runner segments 30 is shown in FIG. The fastening receptacle for this blade segment 30 has a screw receptacle 72. Furthermore, the fastening receptacle receptacles for stiffening struts 38; 38 ', 48 and 48' of the skid segments 30 and 40. The stiffening struts 38; 38 ', 48 and 48' are described below with reference to FIGS. 10 and 12.

The skid segment 30 will be described in more detail below with reference to FIGS. 9, 10 and 11.

FIG. 9 shows in a schematic sectional view the region of the fastening receptacle 72 of the runner segment 30 shown in FIG. 8 along the section line IX-IX. In the figure 9, the runner segment 30 is shown mounted in a first operating position. The skid segment 30 has a substantially rectangular cross section in the base part 31. On the base part 31, a first runner section 32 is arranged on the underside and a second runner section 33 is arranged on the top side. The first runner section 32 protrudes from the base part 31 at right angles to the right via the second side 36 on the right in FIG. The second runner section 33 protrudes from the base part 31 at right angles to the left via the first left side 34 in FIG. 9. The base part 31 is integrally formed with the first and the second skid sections 32 and 33 of a metal, preferably cast steel. The underside of the first runner portion 32 and the top of the second runner portion 33 are formed substantially flat.

The base part 31 has a second side 36 facing away from the first side 34, which in the first operating position shown in FIG. 9 forms a fastening side with a support surface. With the support surface of the second side 36, the base part 31 rests against the edge 70 of the edge protector 5 and is mounted thereon. In the first operating position shown in FIG. 9, the first runner section 32 covers the edge 70 of the edge protector 5 on the underside with respect to the road or ground surface (not shown) in the direction A.

In the base part 31, a screw receptacle 39 is formed in the region between the first and the second runner section 32 and 33, which is introduced into the base part 31 as a bore with a drilling direction substantially parallel to the central longitudinal plane MLE. The screw receptacle 39 is designed as a slot, which in turn extends substantially perpendicular to the central longitudinal plane MLE or transversely thereto. At the edge 70 of the edge protector 5 and spaced therefrom in the direction B, a screw receptacle 72 of the edge protector 5 aligned with the screw receptacle 39 of the base part 31 is formed. A fastening screw 76 is formed by the two screw receivers 72 and 39 from the inside 8 of the Edge protector 5 introduced and secured to the first side 34 of the base member 31 with a nut 77. A washer 78 is sandwiched between the base member 31 and the nut 77.

The skid segment 30 can also be mounted in a second operating position (not shown). In the second operating position, the runner segment 30 is rotated by 180 ° relative to the first operating position shown in FIG. 9 or mounted on an envelope. As a result, in the second operating position, the first runner section 32 points upward in the direction B, whereas the second runner section 33 points downward in the direction A. Thus, in the second operating position, the second runner portion 33 covers the edge 70 of the edge protector 5 on the underside.

The first runner section 32 and the second runner section 33 protrude from the base part 31 in each case at a height H which, in the illustration of FIG. 9, corresponds to the thickness D of the edge protector 5. Alternatively, the height H can also be selected larger or smaller than the thickness D.

FIG. 10 shows, in a schematic and perspective side view, a runner segment 30 shown in FIG. 8 with first and second runner sections 32 and 33 running parallel to one another.

The first skid portion 32 attached to the first side 34 of the base portion 31 at the lower portion 35 thereof is oriented toward the road or ground surface in the direction A in the orientation of the first operating position shown in FIG. 10 and extends from the base portion 31 at the second side 36 right-angled protruding to the rear. The second skid portion 33 attached to the first side 34 of the base portion 31 at the upper portion 37 thereof is oriented away from the road or ground surface in the direction B in the orientation shown in FIG. 10 and extends from the base portion at the first side 34 31 right-angled protruding forward. Not in FIG. 10 shown second operating position, the second skid portion 33 would be aligned in the direction A on the road or ground surface.

On the skid segment 30, two stiffening struts 38 spaced from one another in the feed direction V are arranged on the first side 34 of the base part 31 between the second runner section 33 and the base part 31. The stiffening struts 38 protrude at the same height H from the base part 31 as the second runner portion 33 protrudes from the base part 31. The stiffening struts 38 extend perpendicular to the second runner section 33 over a length L which is shorter than the height h of the first side 34 of the base part 31 perpendicular to the second runner section 33.

At the skid segment 30, between the first runner section 32 and the base part 31, two stiffening struts 38 'spaced apart from one another in the feed direction V are arranged on the second side 36 of the base part 31. In the illustration of FIG. 10, however, these stiffening struts can not be seen, since they are hidden by the base part 31. However, one of the stiffening struts 38 'is shown in FIG. 11.

The stiffening struts 38 are spaced from the two ends 1 and 2 of the runner segment 30 in the feed direction V or opposite to the feed direction V. At both ends 1 and 2 of the runner segment 30, the first runner portion 32 and the second runner portion 33 are formed chamfered perpendicular to the feed direction V.

On both sides of the stiffening struts 38, a total of four in the feed direction V spaced screw receptacles 39 are formed in the base part 31. The screw receptacles 39 are formed as slots extending substantially perpendicular to the longitudinal center plane MLE of the runner segment 30. Figure 1 1 shows in a schematic front view opposite to the feed direction V, the runner segment 30 shown in the figure 10. The geometric body of the runner segment 30 is point-symmetrical to the body center M is formed. This can also be seen in FIG. 10, in which the body center M is also drawn.

As shown in FIG. 11, the second runner portion 33 is attached to the first side 34 of the base portion 31 in the upper portion 37 thereof, and the second runner portion 32 is attached to the second side 36 of the base portion 31 in the lower portion 35 thereof. The first and second runner sections 32 and 33 together with the base part 31 form a profile with a substantially Z-shaped cross section. The base part 31 forms a profile which extends along the edge protector 5 and has a rectangular cross section.

FIG. 12 shows, in a schematic and perspective side view, the runner segment 40 shown in FIG. 8 with bent first and second runner sections 42 and 43. The first runner section 42 attached to the second side 46 of the base part 41 at its lower region 45 is shown in FIG 12 oriented orientation of the first operating position in the direction A on the road or ground surface. The second runner section 43 attached to the first side 44 of the base part 41 at its upper region 47 is oriented in a direction pointing away from the road or ground surface in the direction B in the orientation of the first operating position shown in FIG. In the second operating position, not shown in FIG. 12, the second runner section 43 would be aligned in the direction A on the road or ground surface.

The second runner section 43 extends at the first end 1 pointing in the feed direction V in the direction of the first runner section 42, whereas the first runner section 42 extends in the direction of the second runner section 43 at the second end 2 pointing counter to the feed direction V. The portion of the second runner portion 43 in the region of the second end 2 extends to the Section of the first runner portion 42 in the region of the first end 1 in parallel. The shape of the base part 41 follows the curved course of the first and second skid sections 42 and 43.

On the skid segment 40, a stiffening strut 48 spaced from the second end 2 in the feed direction V between the second runner section 43 and the base part 41 is arranged on the first side 44 of the base part 41. The stiffening strut 38 protrudes at the same height H with respect to the base part 41 as the second runner portion 43 protrudes from the base part 41. The stiffening strut 48 extends perpendicular to the second runner portion 43 over a length L which is shorter than the height h of the first side 44 of the base member 31 perpendicular to the straight portion of the runner portion 43.

At the skid segment 40, a stiffening strut 48 'is likewise arranged on the second side 46 of the base part 41 between the first runner section 42 and the base part 41. In the illustration of FIG. 12, however, this stiffening strut can not be seen, since it is covered by the base part 41. However, the stiffening strut 48 'is shown in FIG.

The stiffening struts 48 are spaced from the two ends of the runner segment 40 in the feed direction V. At the first end 1 of the runner segment 40, the first runner portion 42 is formed chamfered perpendicular to the feed direction V. At the second end 2 of the runner segment 40, the second runner portion 43 is formed chamfered perpendicular to the feed direction V.

On both sides of the stiffening strut 48 are two in the feed direction V spaced screw receptacles 49 formed on the first side 44 in the base part 41, and a third screw receptacles 49 is formed near the first end 1. The screw receptacles 49 are introduced as bores with drilling direction substantially parallel to the central longitudinal plane MLE in the base part 41. The Screw receptacles 49 are designed as elongated holes, which in turn extend substantially perpendicular to the central longitudinal plane MLE or transversely thereto.

FIG. 13 shows a schematic front view, opposite to the feed direction V, of the runner segment 40 shown in FIG. 12. The geometric body of the runner segment 40 is designed to be point-symmetrical with respect to the body center point M. This can also be seen from the figure 12, in which also the body center M is located.

As shown in FIG. 13, the second runner portion 43 is attached to the first side 44 of the base 41 in the upper portion 47 thereof, and the first runner portion 42 is attached to the second side 46 of the base 41 in the lower portion 45 thereof. The mutually parallel sections of the first and second runner sections 42 and 43 form together with the base part 31 a profile with a substantially Z-shaped cross-section. The base part 31 forms in the region of the parallel sections of the first and second runner sections 42 and 43 a profile extending along the edge protector 5 with a rectangular cross section.

FIG. 14 shows a schematic side view of the edge protector 5 shown in FIG. 1 with two runner segments 50 arranged in series at its lower edge 70 according to a third embodiment. The identically designed runner segments 50 are mounted in a first operating position. The edge 70 has socket-forming clamping elements 73a, 73b and 73c for receiving the runner segment 50. The clamping elements 73a, 73b and 73c will be described in more detail below with reference to FIGS. 20 and 21 in particular.

Hereinafter, one of the skid segments 50 will be described in more detail with reference to FIGS.

FIG. 15 shows, in a schematic sectional view, the skid segment 50 shown on the left in FIG. 14 along the section line XV-XV. Figure 16 shows in more schematic Sectional view of the identical segment segment 50 shown in Figure 14 right along the section line XVI-XVI.

In FIGS. 15 and 16, the runner segment 50 is shown mounted in a first operating position. The skid segment 50 has a substantially rectangular cross-section base 51. On the base part 51, a first runner section 52 and on the top side a second runner section 53 are arranged on the underside. The first runner section 52 protrudes from the base part 51 at right angles to the right via the second side 56 on the right in FIG. The second runner section 53 protrudes from the base part 51 at right angles to the left via the first left side 54 in FIG. 15. The base part 31 is integrally formed with the first and the second skid sections 52 and 53 of a metal, preferably cast steel. The underside of the first runner portion 52 and the top of the second runner portion 53 are substantially planar.

The base part 51 has a first side 54 facing away from the second side 56, which forms a mounting side with a support surface in the first operating position shown in Figure 15. With the support surface of the second side 56, the base part 51 rests against the edge 70 of the edge protector 5 and is mounted thereon. In the first operating position shown in FIG. 15, the first runner section 52 covers the edge 70 of the edge protector 5 on the underside with respect to the road or ground surface (not shown) in the direction A.

The geometric body of the runner segment 50 is formed point-symmetrical to the body center M. This can also be seen from the following figures 16, 18 and 19, in which also the body center M is located.

As can be seen from the combination of FIGS. 15 and 16, clamping elements 73c and 73a engage on the first side 54 from the left on the lower region of the base part 51. The clamping elements 73a and 73c will become particular hereinafter described in more detail with reference to Figures 20 and 21. The clamping elements 73c and 73a define the skid segment 50 in the first operating position shown in FIG. Between the second side 56 of the base part 51 and the outside 7 of the edge protector 5, a rubber element 67 'attached to the base part acts. By a contact pressure, which is applied by the clamping elements 73c and 73a on the base member 51 in the direction of the edge protector 5, the rubber element 67 'is compressed and thus supports the fixation of the runner segment 50 in the first operating position.

The skid segment 50 can also be mounted in a second operating position (not shown). In the second operating position, the runner segment 50 is rotated by 180 ° relative to the first operating position shown in FIG. 15 or mounted on an envelope. As a result, in the second operating position, the first runner section 52 points upward in the direction B, whereas the second runner section 53 points downward in the direction A. Thus, in the second operating position, the second runner section 53 covers the edge 70 of the edge protector 5 on the underside.

The first runner section 52 and the second runner section 53 protrude from the base part 51 in each case at a height H which, in the representation of FIG. 15, essentially corresponds to the thickness D of the edge protector 5. Alternatively, the height H can also be selected larger or smaller than the thickness D.

FIG. 17 shows a schematic and perspective side view of one of the runner segments 50 shown in FIG. 14. In the representation of FIG. 17, the runner segment 50 is shown in the orientation of the first operating position.

The base part 51 has two laterally drawn-in areas 60 and 61. The laterally drawn-in region 60 shown on the left in FIG. 17 forms an approximately V-shaped recess, which is delimited substantially by two inwardly inclined partial regions 62b and 63b. The illustrated on the right in Figure 17 laterally retracted area 61 also forms an approximately V-shaped recess which is bounded substantially by two inwardly inclined portions 62a and 63a. The inwardly inclined portions 62b and 63b and 62a and 63a form the legs of the V-shape.

Between the inwardly inclined portions 62b and 63b extends in the valley of the V-shape extending perpendicularly to the first and second runner portions 52 and 53 portion 65. Between the inwardly inclined portions 62a and 63a extending in the valley of the V-shape also a perpendicular to the first and second runner portions 52 and 53 extending portion 64. The portions 64 and 65 extend while parallel to each other.

In the upper region 57 of the first side 54 of the runner segment 50, two rubber elements 66 and 67 spaced from one another and from the second runner section 53 are arranged. On the non-visible in Figure 17 second side 56 of the skid segment 50 two mutually and the first skid portion 52 spaced rubber elements are arranged, of which the rubber element with the reference numeral 67 'in the figure 18 is shown.

Figure 18 shows in a schematic front view opposite to the feed direction of the blade segment 50 shown in Figure 17. On the first side 54 of the base member 51 in the upper portion 57 of the second runner section 53 is mounted, and on the second side 56 of the base member 51 is in the lower portion 55 of the first runner portion 52 attached. The first and second runner sections 52 and 53 together with the base part 51 form a profile with a substantially Z-shaped cross section.

FIG. 19 shows, in a schematic and perspective side view, an enlarged partial region of the edge protector 5 shown in FIG. 14. Clamping elements 73a, 73b and 73c for receiving two runner segments 50 are arranged on the edge 70 of the edge protector. By means of the clamping elements 73a, 73b and 73c, the two illustrated runner segments 50 are fixed in the first operating position. Between the clamping elements 73a and 73b, the lower portion of the runner segment 50 is held in a form-fitting manner. The clamping elements 73 a and 73 b are formed complementary to the inwardly inclined portions 62 b and 62 a of the base part 51. The clamping elements 73b and 73c are also formed complementary to the inwardly inclined portions 62b and 62a of the base part 51. Two mutually spaced clamping elements 73a and 73b or 73b and 73c respectively act on both sides on the inwardly inclined partial areas 62b and 62a of the base part 51.

In the embodiment shown in FIG. 19, the clamping elements 73a and 73c serve on one side for receiving only one runner segment 50, whereas the clamping element 73b arranged therebetween serves to receive two runner segments 50.

FIG. 20 shows, in a schematic and perspective side view, the edge protector 4 shown in FIG. 14 with disassembled edge segments 50. FIG. 21 shows in a schematic and perspective side view and in an enlarged detail view DA the edge protector 5 shown in FIG.

The clamping elements 73a and 73b have substantially parallel to the inwardly inclined portions 62a and 62b of the base member 51 ersteckende stop surfaces 74a and 74b, which are positively mounted in the first operating position state with the inwardly inclined portions 62a and 62b of the base member 51 into engagement , In the second operating position, the stop surfaces 74a and 74b are engaged with the inwardly inclined portions 63a and 32b of the base member 51.

On the clamping elements 73a and 73b, the base part partially encompassing undercuts 75a and 75b are formed. The undercuts 75a and 75b support the base part in the direction of the edge protection 5, whereas the abutment surfaces 74a and 74b positionally stable in the respective operating position align.

Both the undercuts 75a and 75b and the stop surfaces 74a and 74b have parallel portions 79a and 79b to the portions 64 and 65 of the base portion 51.

When mounted in the first operating position, the skid segment 50 is attached to the clamping elements 73a and 73b with a small offset downwards in direction A, so that the parallel sections 79a and 79b pass through the laterally drawn-in regions 60 and 61 of the base part 51. Subsequently, the skid segment 50 is pushed from below so far behind the undercuts 75a and 75b up until the inwardly inclined portions 63a and 32b of the base member 51 abut the stop surfaces 74a and 74b. The arranged in this area rubber elements 67 'come here at the edge protection for pressing system.

Claims

Skid segment (10; 20; 30; 40; 50) for edge protection (5) of a

Road milling machine or the like tillage machine comprising a base part (1 1; 21; 31; 41; 51) and at least one first runner section (12; 22; 32; 42; 52) attached thereto, the first runner section (12; 22; 32; 42, 52) in a first operating position of the base part (1 1, 21, 31, 41, 51) in the direction (A) can be aligned with the road or ground surface, characterized in that

that at the base part (1 1; 21; 31; 41; 51) at least a second

Skid portion (13; 23; 33; 43; 53) is mounted, which in a second operating position of the base part (1 1; 21; 31; 41; 51) in the direction (A) on the road or ground surface is aligned.

Skid segment (10; 20) according to claim 1,

characterized,

in that on a first side (14; 24) of the base part (1 1; 21) in its lower region (15; 25) the at least one first runner section (12; 22)

and that the base part (1 1; 21) has a second side (16; 26) facing away from the first side (14; 24), which in the first operating position forms a fastening side with at least one support surface.

Skid segment (10; 20) according to claim 1,

characterized,

in that the at least one second runner section (13; 23) is mounted on the first side (14; 24) of the base part (1 1; 21) in its upper region (17; 27), the first and second runner sections (12; 22 ; 13; 23) together with the base part (1 1; 21) form a profile with a substantially U-shaped cross-section.

4. skid segment (20) according to any one of claims 1 to 3,

characterized,

in that the first runner section (22) and the second runner section (23) at least at the first end (1) pointing in the feed direction (B) converge in a curved manner and the first and second runner sections (22, 23) together with the base part (21) are tapered train first end (1).

5. skid segment (10; 20) according to one of claims 1 to 4,

characterized,

the skid segment (10; 20) is formed symmetrically to the longitudinal center plane (MLE).

6. skid segment (30; 40; 50) according to claim 1,

characterized,

in that on a second side (36; 46; 56) of the base part (11; 21; 31; 41; 51) in its lower region (15; 25; 35; 45; 55) the at least one first one

The second side (36; 46; 56) of the base part (31; 41; 51) in the first operating position a

Attachment side forms with at least one support surface.

7. skid segment (30; 40; 50) according to claim 6,

characterized,

in that the base part (31; 41; 51) has one of the second side (36; 46; 56).

The at least one second runner section (33; 43; 53) is mounted in the upper region (37; 47; 57) thereof, wherein the first and second runner sections (32; 42; 52 ; 33; 43; 53) together with the base part (31; 41; 51) form a profile with a substantially Z-shaped cross-section.

8. skid segment (10; 20; 30; 40) according to claim 3, 6 or 7,

characterized, that at an angle between the first runner portion (12; 22; 32; 42) and the base part (1 1; 21; 31; 41) and / or at an angle between the second runner portion (13; 23; 33; 43) and at least one stiffening strut (18; 28; 38; 38 ';48;48') in each case at the base part (1 1; 21; 31; 41)

is arranged.

9. skid segment (40) according to any one of claims 6 to 8,

characterized,

in that the second runner section (43) is bent in the direction of the first runner section (42) at the first end (1) pointing in the feed direction (V), and the first runner section (42) extends at the second end (2) pointing counter to the feed direction (V). is bent in the direction of the second runner portion (43), and the base part (41) preferably at the first and second ends (1, 2) following the course of the second and first runner portion (43, 42).

10. skid segment (30; 40; 50) according to any one of claims 6 to 9,

characterized,

that the geometric body of the runner segment (30; 40; 50)

is formed point-symmetrically to the body center (M).

1 1. A skid segment (10; 20; 30; 40; 50) according to any one of claims 1 to 10,

characterized,

in that the base part (1 1; 21; 31; 41; 51) has a rectangular profile which extends at least in sections along the edge protection (5)

Cross section forms.

12. skid segment (10; 20; 30; 40) according to one of claims 1 to 1 1,

characterized,

in that in the base part (1 1, 21, 31, 41) at least one screw receptacle (19, 29; 39; 49) is formed.

13. skid segment (10; 20; 30; 40) according to claim 12,

characterized,

the screw receptacle (19; 29; 39; 49) is designed as a slot extending substantially perpendicular to the central longitudinal plane (MLE).

14. skid segment (50) according to any one of claims 6 to 1 1,

characterized,

in that the base part (51) has two laterally drawn-in regions (60; 61), wherein the drawn-in regions (60; 61) project from the first runner section (52) in the direction of the second runner section (53) and from the second runner section

Skid portion (53) in the direction of the first skid portion (52) in each case in two inwardly inclined portions (62a, 62b, 63a, 63b) pass.

15. skid segment (50) according to claim 14,

characterized,

in that two substantially parallel partial regions (64, 65) are formed between the respective two inwardly inclined partial regions (62a, 62b; 63a, 63b).

16. edge protection (5) for a road milling machine or the like.

A tilling machine comprising at least one segment (10; 20; 30; 40; 50) according to any one of claims 1 to 14, wherein the edge protector (5) has a rim (70) adapted to receive at least one

Skid segment (10; 20; 30; 40; 50) is formed,

characterized,

in that the edge (70) has fastening receivers (71; 72, 73a; 73b) for receiving at least one runner segment (10; 20; 30; 40; 50).

17. edge protection (5) according to claim 16,

characterized,

in that the attachment receptacles for the runner segments (10; 20; 30; 40) have at least one screw receptacle (71; 72).

18. edge protection (5) according to claim 16 or 17,

characterized,

in that the attachment receptacles (72) for the runner segments (10; 20; 30; 40) comprise at least one receptacle for the stiffening struts (18; 28; 38; 38 '; 48; 48') of the runner segments (10; 20; 30; 40). exhibit.

19. edge protection (5) according to any one of claims 16 to 18,

characterized,

in the first operating position the first runner section (12; 22; 32; 42) covers the edge (70) of the edge protector (5) on the underside and in the second operating position the second runner section (13; 23; 33; 43) covers the edge (70 ) of the edge protector (5) covers on the underside.

20. edge protection (5) according to any one of claims 16 to 18,

characterized,

in the first operating position, the first runner section (12; 22; 32; 42) projects in the direction (A) onto the road or ground surface via the edge (70) of the edge protector (5) and in the second operating position the second runner section (13 ; 23; 33; 43) in the direction (A) on the road or ground surface over the edge (70) of the edge protector (5) protrudes.

21. Edge protection (5) according to claim 17,

characterized,

the fastening mountings for the runner segments (50) have at least one plug-in receptacle (73a, 73b) for the positive-locking retention of at least one runner segment (50).

22. edge protection (5) according to claim 21,

characterized,

the plug-in receptacle has two spaced-apart Klennnnelennente (73a, 73b) which are effective on both sides of the inwardly inclined portions (62a, 62b, 63a, 63b) of the base part (51).

23. edge protection (5) according to claim 22,

characterized,

in that the clamping elements (73a, 73b) are substantially parallel to the inwardly inclined portions (62a, 62b, 63a, 63b) of the base part (51) ersteckende stop surfaces (74a, 74b) and the base part (51) at least partially embracing undercuts (75a 75b).