KR20130118272A - Runner segment for an edge guard of a road milling machine, and edge guard for a road milling machine - Google Patents

Abstract

PURPOSE: A runner segment for an edge guard of a load milling machine and the edge guard for the load milling machine can be easily replaced in a construction site with a bad condition by being inserted in an insertion receptacle. CONSTITUTION: A runner segment for an edge guard of a load milling machine includes a runner unit and a fixing unit. The fixing unit is formed in an insertion protrusion unit. The insertion protrusion unit includes one or more stopping surfaces extended by crossing a central axis of a longitudinal direction.

Description

Runner segment for an edge guard of a road milling machine, and edge guard for a road milling machine}

The present invention relates to a runner segment for an edge guard of a rod milling machine or similar soil working machine, wherein the runner segment has a runner part in which the fixing part is formed indirectly or directly.

Road milling machines are used for road and passage construction. Such a rod milling machine serves to completely or preferably partially remove existing road material in such a situation, in which case a milling drum is used which is housed in a protected manner inside the drum housing. The milling drum usually has small pieces that engage the substrate to be processed for road material removal. Protective elements called "edge guards" are inserted on the drum housing sides extending in the direction of movement of the rod milling machine. The edge guard covers the milling drum at the edge, thus preventing access to the milling drum on the one hand during the milling operation and on the other hand preventing the ground material from being blown off to the surroundings. The edge guard is placed on the road face with a low skid runner to achieve complete covering of the milling drum. The skid runner further depresses the untreated road material located outside the operating area adjacent to the milling drum. The edge guards thus form a brace wall which prevents sideways adjoining road material from leaving during the milling process. Skid runners are assembled from runner segments, which undergo a certain amount of wear and must be replaced when their wear limits are reached. The runner segments comprise a locking portion which is bolted laterally on the edge guard for this purpose. The bolt heads of the runner segments are sometimes exposed to the offending attack of the removed material and fall to the ground. These bolt heads can no longer be loosened using the intended tool. It is also possible for the adhesive faces between the edge guard and runner segments to corrode. The runner segments can no longer be positioned in a way that can be reproduced correctly.

It is an object of the present invention to make available runner segments for edge guards that allow simple maintenance.

It is a further object of the present invention to make available an edge guard of the kind described above which facilitates simple maintenance.

The object associated with the runner segment is achieved in that the locking portion of the runner segment is implemented as an insertion protrusion. Thus, the runner segment can be inserted into the insertion receptacle thus implemented of the edge guard with the insertion protrusion, so that it can be easily replaced under rough construction site conditions. Insertion protrusions are placed in the insertion receptacles in the wear protection area to facilitate reproducible interrelationship of the runner segments with edge guards.

In order to ensure that the precise interrelationship of the individual runner segments with each other can be ensured in a simple manner, provision can be made that at least one stop face is provided which extends across the longitudinal central axis defining the insertion direction of the insertion protrusion. . The runner segment can thus slide into the edge guard with the insertion protrusion until the stop face limits the insertion motion in a defined manner.

In such a situation, the provision can be particularly preferably made that the insertion protrusion comprises a stop which can limit the insertion movement. This stop is thus received in such a way that wear is prevented in the region of the insertion protrusion.

Installation can be further simplified by the fact that the insertion protrusion has at least one shaped-on introduction centering feature in its free end region.

If provision is made for the insertion projection to include support flanks extending on the opposite side across the running direction of the runner segment, a securely engaging support in the main force direction of the edge guard during operational use Can be achieved.

Particularly preferably, the support flanks extend next to each other or converge in the direction of insertion of the insertion protrusion. Further converging face regions result in a taper geometry of the end of the insertion protrusion that simplifies the introduction into the insertion receptacle. According to another variant of the invention, provision can also be made that the support flanks comprise face regions having a convex or concave shape. Such face areas provide large removal face areas that promote lower face pressures.

It may happen that during operational use the rod milling machine is moved across the main direction of movement. In this operating state as well, in order to maintain reliable floatation of the runner segments, provision may be made that the insertion projections include side surfaces extending in the running direction of the runner segment on the opposite side. The runner segment can be reliably supported by these side faces against the corresponding counter-surfaces of the edge guard.

Rod milling machines also often move in opposition to the main direction of travel during operational use. This causes a load situation on the runner segment that deviates from those in the operating situation in the main direction of movement. To ensure that a load-optimized design of the runner segment is achieved in this situation, the geometric shape of the insertion protrusion is asymmetrical with respect to the transverse center plane, which extends through the longitudinal center axis of the insertion protrusion and extends across the running direction of the runner segment. In accordance with one variant of the present invention, the definition is made.

According to an alternative invention conceivable, provision may be made that at least one protrusion is provided which projects in the running direction, which projects beyond the insertion protrusion in the running direction or vice versa. Such protrusion serves to enlarge the edge guard regions located between the individual runner segments and thus enables a maximum gapless runner implementation.

The compact construction of the runner segment is facilitated by the fact that the protrusions supporting the runner portion abut indirectly or directly with the insertion protrusion.

In particular, in such a situation, provision may be made that the runner portion has a larger width than the protrusion. Due to this kind of cross section offset, a maze-like overlap of entering the insertion receptacle can be achieved. This reduces the ingress of dust into the insertion receptacle.

Due to the fact that hard elements 37, such as, for example, wear resistant steel welds, hard metal elements, hard coatings, etc. are applied on the runner portion, a high level of wear resistance to the runner segments can be achieved. have.

A particularly preferred variant of the invention is that a clamp element is used which comprises one or more resilient functional parts. With such a clamp element, the runner segment can be fixed in a simple manner on the edge guard, so that the connection can be easily fitted and released due to the resilience of the functional parts. Particularly preferably, the clamp element is held in the region of the insertion protrusion and received in a manner that is protected from wear.

When the clamping element includes a receptacle in the form of a cutout or recess, into which the clamping element is introduced, an especially simple correlation of the clamping element and the runner segment can be achieved. The resilience of the clamp element can in particular also be used to achieve retention in the receptacle, so that additional locking means can be omitted.

The object of the present invention is directed to an edge guard for a rod milling machine or similar soil treatment machine, in which the edge comprises insertion receptacles for the reception of runner segments. The runner segments can be easily inserted into insertion receptacles, preferably without tools. The insertion protrusion of the runner segment is received in a manner that prevents wear on the insertion receptacles, and the runner segments can be resiliently fitted into the insertion receptacles. This greatly simplifies the maintenance of the edge guards.

Particularly preferably, the insertion receptacles have a pocket configuration and are open toward the bottom face of the edge guard. A simple creation of an edge guard is possible if it is specified that the edge comprises apertures implemented in at least a locally closed comb-like manner with partitions spaced apart from each other in a parallel manner to form the receptacles. .

The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawings.

1 is a perspective view of an edge guard for a rod milling machine.
FIG. 2 is a detailed cross-sectional view labeled II-II in FIG. 1. FIG.
FIG. 3 is a detailed cross-sectional view labeled III-III in FIG. 1. FIG.
4 is a perspective view of a first modification of the runner segment;
FIG. 5 is a cross-sectional view of the runner segment according to FIG. 4 along a cutting line labeled VV. FIG.
6 is a perspective view of a second modified example configuration of the runner segment;
7 is a side view of the runner segment according to FIG. 6;
8 is a perspective view of a third modification of the runner segment.
9 is a cross-sectional view taken along the transverse center plane, denoted by Ⅸ-Ⅸ of the runner segment according to FIG. 8;

1 shows an edge guard 10 for a rod milling machine with a base part 10.1 having a plate like configuration. This base part 10.1 forms a fastening side 11 for engaging on a rod milling machine in the region of the drum housing. On the opposite side of the locking side 11, the edge guard 10 comprises an edge 12. This edge 12 has cutouts spaced apart from each other by webs 13 resulting in a geometric shape, such as a comb. Partitions 16 made of sheet metal are inserted into gaps formed between the webs 13. Two separate partitions 16 spaced apart and next to each other are inserted into each cutout. This creates an insertion receptacle 14 as shown in FIGS. 2 and 3 between the partition 16 and the web 13. The partitions 16 are welded to the edge 12 of the edge guard 10 via the weld bead connection 17. The result is a plurality of insertion receptacles 14 arranged spaced apart from one another at a uniform pitch. These insertion receptacles 14 serve to receive the runner segments 30 as shown in more detail by way of example in FIGS. 4 to 9. The runner segments 30 have a substantially similar configuration in terms of their basic configuration. These include a runner portion 36 lined on its lower surface with a hard element 37. Crossfacing made of metal powder can be used, for example, as the hard element 37. It is also conceivable to apply a light metal element or a hard cross-section cutting welding on the runner portion. The protrusion 31 is shaped onto the runner portion 36. The projection 31 has a narrower width than the runner portion 36 across the running direction L, which extends in the main direction of movement of the rod milling machine. This results in shoulder-like portions on either side of the projection 31 forming the adjacent surface 36.1. The protrusion 31 includes two protrusions 32 protruding from both sides in the running direction L beyond the insertion protrusion 38. The protrusions 32 form stop surfaces 33 that transition through fillet transitions 34 to the side walls 35.

The insertion protrusion 38 is bounded by two sides 38.3 extending in the running direction L. As shown in FIG. The sides 38.3 are parallel to each other. Lateral 38.3 transitions without shoulders into protrusion 31.

As shown by the variant configuration according to FIGS. 4 and 5, the insertion protrusions 38 comprise two support flanks 38.25 perpendicular to the sides 38.3 and spaced apart from one another and side by side. Each support flank 38.2 transitions through an introduction centering shape 38.1 to the end face 38.4.

The clamp element 40 is fixed in the region of the insertion protrusion 38. The clamp element 40 comprises resilient functional parts 42 which are embodied primarily as louvers, as is apparent in FIG. 5. It is also conceivable to use a clamp element implemented in a block-like manner and composed of a resilient material, in which case one or all of the blocks constitutes a resilient functional part. The functional parts 42, such as louvers, are set in an arrow-shaped manner with respect to each other and are inclined towards the insertion axis which defines the longitudinal central axis M of the insertion protrusion. As is apparent from FIG. 5, the clamp element 40 comprises a base part 41 on which the functional parts 42 are integrally molded. A pocket-shaped receptacle 39 in the form of a cutout is recessed into the insertion protrusion 38. A clamp element 40 is inserted into the receptacle 39 with its base part 41, the receptacle 39 holding its base part 41 against the bottom 39.1 of the receptacle. ought. In the case of this example, the clamp element 40 is implemented in such a way that the base part 41 also has elasticity. It can then be unrolled with an overdimension into the receptacle 39 so that no additional fastening means are needed. Alternatively, the clamp element 40 may also be glued to prevent it from sticking into the receptacle 39. In the installed state, the functional parts 42 project slightly beyond the side surface 37.3, as is apparent from FIG. 5. Such protrusions are indicated by a in FIG. 5. For installation of the runner segment 30 shown in FIGS. 4 and 5 in the edge guard 10 according to FIG. 1, the runner segment 30 has its insertion protrusion against an insertion receptacle 39 which opens to the bottom. Is set first to (38). An introduction centering shape 38.1 is threaded on the adjacent webs 13 to facilitate installation. The runner segment 30 is then pushed into the insertion receptacle 39 with its insertion protrusion 38 towards the longitudinal central axis M. This may happen first with little effort or little effort until the functional parts 42 are engaged with the inner sides of the compartments 16. The functional parts 42 must be elastically deformed upon insertion of the runner segment 30. The insertion movement of the runner segment 30 into the insertion receptacle 14 is limited by the stop surfaces 33 of the projections 32. These abut the end faces 15 of the webs 13. In the installed state, the adjacent surface 36.1 of the runner portion 36 has a short distance from the counter surface 19 located at the end of the partition 16, as is apparent from FIG. The end face 38.4 is likewise spaced from the bottom face located opposite the insertion receptacle 14. Alternatively, the correlation may be selected in such a way that the runner segment 30 is supported by the end face 38.4 with respect to the bottom face of the insertion receptacle 14. The stop face 33 is then at a short distance from the end face of the webs 13. The geometric engagement of the stop between the runner segment 30 and the insertion receptacle 14 is received in a protected manner at the insertion receptacle 14. Alternatively, the clamp element 40 can also be received on the base part 10.1 which is particularly protected in the insertion receptacle 14.

During operational use, the runner segments 30 are rubbed onto the substrate with their hard elements 37 and are thereby constantly worn out. Once the wear limit is reached, runner segments 30 can be easily replaced. For removal, openings 18, such as a window, are provided in the externally located partitions 16. A tool 20 with a drift punch 21 can be disposed in these openings 18. The drift punch 21 supports the adjacent face 36.1 of the runner portion 36. A force that is then driven vertically down into the runner segment 30 by a hammer blow may be applied. The frictionally engaged connection between the inner side of the partition 16 and the clamp element 14 is then released by sliding the runner segment 30. Runner segment 30 can then be pulled completely from insertion receptacle 14 and replaced with a new runner segment 30.

6 illustrates another variant embodiment of the runner segment 30. This form of the runner segment 30 corresponds substantially to the runner segment 30 according to FIGS. 4 and 5, whereby reference may be made to the above-mentioned statements to avoid repetition. In contrast to the runner segment 30 according to FIGS. 4 and 5, the support flanks 38.2 are not parallel to each other, but instead are set in a V shape and converge towards the free end of the insertion protrusion 38. Accordingly, the webs 13 are preferably configured in such a way that they form adapted angled stop surface regions that branch from the insertion receptacle 14 toward the bottom opening. This results in a conical seating-surface pair between the webs 13 and the runner segment 30. This has the advantage that after the introduction of only a small drive movement towards the longitudinal center axis M, the support flank 38.2 has already come out of engagement with the corresponding counter-faces of the webs 13, so that no frictional forces are created during driving. Has

FIG. 7 shows that two pocket shaped receptacles 39 corresponding to the arrangement according to FIGS. 4 and 5 are introduced into the insertion protrusion 38. The receptacles 39 are spaced apart from each other in the running direction L and the resilient functional parts 42 of the clamp element 40 protrude on both sides of the insertion protrusion 38. This achieves bilateral clamping of the insertion protrusion 38 in the insertion receptacle 14. This type of clamping is of course possible for all runner segments 30. In contrast to the runner segment 30 according to FIGS. 4 and 5, the runner component 36 and the resulting hard element 37 are convex. According to FIG. 1, this runner segment 30 is advantageously arranged, for example, at the front end of the edge guard 10 and as a result forms a run-on ramp coupling structure.

8 and 9 show another modified configuration of the runner segment 30. In this case as well, references to the foregoing statements are made to avoid repetition on the same reference characters. Only the differences are explained below. As shown in FIG. 8, the insertion protrusion 38 includes two opposingly positioned support flanks 38.2. They first adjoin the stop surfaces 33 and have surface regions angled with respect to each other. These face regions converge towards the free end of the insertion protrusion 38. Shoulderless convex face regions of the support flank 38.2 are connected adjacent to converging face regions. These convex regions of the support flank 38.2 likewise eject and transition to the opposite side via a convex introduction centering shape. This geometry also allows for precisely tailored and simple interrelationship of the insertion projections 38 with the corresponding counter-faces of the webs 13.

As shown in FIG. 9, the clamp element 40 includes a base part 41 to which resilient functional parts 42, such as louvers, are attached to both sides. The resilient functional parts 42 are once again set in an arrow shape for simplified introduction of the insertion protrusion 38 into the insertion receptacle 14 and slightly protrude on both sides beyond the side 38.3 of the insertion protrusion 38. do. The receptacle 39 is made by digging out the insertion protrusion 38 as a cavity. The introduction of the insertion protrusion 38 into the insertion receptacle 14 of the edge guard 10 causes the functional parts 10 to slide along and deform therein the inner sides of the two compartments 16.

Claims (20)

A runner segment for an edge guard 10 of a rod milling machine or similar soil action machine, the runner segment having a runner part 36, the fixing part being formed on the runner part 3 indirectly or directly,
Runner segment, wherein the fixing is embodied as an insertion protrusion (38). The method of claim 1,
Runner segment, provided with at least one stop surface (33) extending across the longitudinal central axis, which defines the insertion direction of the insertion protrusion (38). 3. The method according to claim 1 or 2,
The insertion protrusion (38) comprises a stop (stop) of the insertion movement is limited. The method according to any one of claims 1 to 3,
The insertion protrusion (38) has at least one shaped-on introduction centering shape (38.1) in its free end region. The method according to any one of claims 1 to 4,
The insertion protrusion (38) comprises on the opposite side, support flanks (38.2) extending across the running direction (L) of the runner segment (30). The method of claim 5, wherein
The support flanks (38.2) comprise side sections extending next to each other or converging in the insertion direction of the insertion protrusion (38). The method according to claim 5 or 6,
The support flanks (38.2) comprise face regions formed in a convex or concave manner. The method according to any one of claims 1 to 7,
The insertion segment (38) comprises, on the opposite side, a side (38.3) extending in the running direction (L) of the runner segment (30). The method according to any one of claims 1 to 8,
The insertion protrusion 38 runs through the longitudinal central axis M of the insertion protrusion and is geometrically asymmetrical with respect to the transverse center plane extending across the running direction L of the runner segment 30. Representing, runner segment. 10. The method according to any one of claims 1 to 9,
At least one protrusion 32 is provided that protrudes in the running direction L, and the protrusion 32 extends beyond the insertion protrusion 38 and is opposite to the running direction L or the running direction L. Protruding, runner segment. 11. The method according to any one of claims 1 to 10,
Runner segment, in which the protrusion (31) supporting the runner portion (36) indirectly or directly contacts the insertion protrusion (38). 11. The method of claim 10,
The runner segment (36) has a greater width than the protrusion (31). 13. The method according to any one of claims 1 to 12,
The runner segment (36) comprises a hard material element (37), such as, for example, wear resistant steel welds, light metal elements, or hard coatings. 14. The method according to any one of claims 1 to 13,
A runner segment in which a clamp element 40 is used which comprises at least one resilient functional part 42. 15. The method of claim 14,
The clamp element (40) is retained in the region of the insertion protrusion (38). 16. The method according to claim 14 or 15,
The insertion protrusion (38) comprises a receptacle (39) in the form of a cutout or recess, into which the clamp element (40) is introduced. As an edge guard 10 for a rod milling machine or similar soil treatment machine having an edge 12 implemented for the reception of runner segments 30,
The edge (12) comprises an insertion receptacle (14) for receiving the runner segments (30). The method of claim 17,
The insertion receptacle (14) is configured in the form of a pocket (pocket), edge guard, which is open toward the lower surface of the edge guard (10). The method according to claim 17 or 18,
The edge (12) comprises apertures implemented in a comb-like manner, at least locally closed with partitions (18) spaced apart in parallel to each other to form the receptacles. 20. The method according to any one of claims 17 to 19,
Edge guard with at least one runner segment (30) according to any one of the preceding claims.

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