EP4669809A1 - Schneeräumleiste für den räumschild eines schneepfluges - Google Patents
Schneeräumleiste für den räumschild eines schneepflugesInfo
- Publication number
- EP4669809A1 EP4669809A1 EP24805430.6A EP24805430A EP4669809A1 EP 4669809 A1 EP4669809 A1 EP 4669809A1 EP 24805430 A EP24805430 A EP 24805430A EP 4669809 A1 EP4669809 A1 EP 4669809A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel plate
- strip
- snow
- hard metal
- wear strips
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
- E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
- E01H5/061—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by scraper blades
Definitions
- the invention relates to a snow clearing strip for the clearing blade of a snow plow with a front steel plate and a rear steel plate which can be fixed together by means of fastening means to the lower edge of the clearing blade and between which an elastic rubber body is vulcanized, wherein one or more metallic wear strips are embedded in this rubber body with limited mobility, which wear strips have a clearing edge which touches the road surface to be cleared and is reinforced by one or more hard metal inserts.
- Snow clearing blades of this type are known, for example, from DE 10 2016 114 457 A1.
- the snow clearing blades resulting from this publication have proven extremely effective in practical use, particularly where particularly intensive wear and thus short downtimes are to be expected due to the operating conditions of the snow plow (e.g., high driving speeds and clearing snow).
- the improved wear resistance results primarily from the high abrasion resistance of the hard metal inserts, such as tungsten carbide, in the metal wear strips.
- Snow clearing blades reinforced with hard metal inserts are described, for example, in CH 550 897.
- the invention proposes, starting from a snow clearing bar of the type mentioned at the outset, that the metallic wear strips are each designed as cast parts made of chilled iron, and that the hard metal inserts are fixed in the wear strips by casting them around with the chilled iron.
- the teaching of the invention combines all of the above-explained manufacturing steps for the production of the metallic wear strips reinforced with hard metal inserts into a single operation, namely the production of a cast part made of chilled iron, and, on the other hand, avoids the soldering of the hard metal inserts into the metallic wear strips, which is detrimental to stability and wear resistance.
- a useful development of the invention provides that the hard metal inserts are provided with projections and/or recesses and/or openings to create an additional positive fit within the volume of the metallic wear strips. This additional securing of the hard metal inserts through positive fit is particularly easy to achieve if, according to the teachings of the invention, the hard metal inserts are fixed in the metallic wear strips by encapsulating them with the chilled iron casting. With the prior art, soldering of the hard metal inserts into the metallic wear strips, which merely acts as a material fit, this additional securing of the hard metal inserts in the metallic wear strips would be difficult to achieve.
- Casting the carbide inserts is particularly successful when the carbide inserts are provided with support projections on their front and back sides, which extend at least to the front and back of the metal wear strip. These support projections allow the carbide insert to be supported against the inner wall of the mold during the casting process without the need for special equipment.
- the support projections may be expedient for the support projections to protrude beyond the front and back of the metallic wear rail by the amount of a coating applied to the walls of the casting mold during casting. This ensures absolutely precise fixation of the hard metal system during the casting process, even if the inner walls of the mold are provided with a coating.
- An advantageous embodiment of the snow removal bar according to the invention further provides that the metallic wear rails are provided with projections and/or depressions and/or openings in their embedding area in the rubber body of the snow removal bar, which serve as a positive anchoring in the rubber mass of the rubber body and are integral components of the metallic wear rails designed as a cast part.
- the front steel plate and/or the rear steel plate are provided with openings into which the projections of the metallic wear strip embedded in the rubber mass of the rubber body engage with sufficient play, whereby these projections of the metallic wear strip are dimensioned in such a way that the metallic wear strip cannot fall out of the space between the front steel plate and the rear steel plate even if the rubber mass embedding it is lost, i.e. that the distance between the protruding ends of the projections is greater than the distance between the front steel plate and the rear steel plate.
- a specialised embodiment of the clearing bar according to the invention for particular applications provides that the lower edges of the wear strips are in a plane with the lower edges of the front steel plate and the rear steel plate, with this plane running at an acute angle to the road surface to be cleared.
- a clearing bar designed in this way rests at an acute angle with a relatively large contact surface - consisting of the two steel plates, the metallic wear strips with hard metal inserts and the intermediate rubber layers of the rubber body - on the road surface to be cleared. This large contact surface with soft rubber components ensures a particularly gentle removal of snow from the road surface to be cleared.
- a particularly preferred embodiment of the snow clearing strip according to the invention provides that the metallic wear strips project downwards over the lower edges of the front steel plate and the rear steel plate and that on the surfaces of the front and/or the rear of the wear strips, inclined or curved snow sliding ramps running parallel to the lower edges of the front steel plate or the rear steel plate are arranged between the surfaces of the wear strips on the one hand and the outer sides of the front steel plate or the rear steel plate on the other hand.
- snow ramps provide a smooth transition between the wear strip surfaces on the one hand and the outer surfaces of the front and rear steel plates on the other. These snow ramps ensure that snow or ice does not splash up during rapid movement over the wear strip and steel plates, thus obstructing the snowplow driver's view. This very useful detail can be implemented without additional effort on the cast wear strips, as it only requires the appropriate design of the molds used for production. A further advantage is that the ramps reinforce the cross-section of the metal wear strip where it is most subject to bending stress during use of the snow removal strip.
- the hard metal inserts are fixed in the correct position within a casting mold using suitable holding devices before being encased in the chilled cast iron melt and then encased in the chilled cast iron melt.
- a particularly preferred embodiment of this method provides that support projections are used as holding means for the hard metal inserts, which support projections are located on the front and back of the hard metal inserts and are supported on the inner wall of the casting mold during the casting process.
- Figure 1 schematically shows a side view of a snow clearing bar according to the invention in a first embodiment, partially cut away;
- Figure 1a schematically shows a section through the snow clearing bar according to Figure 1a along the section line AA in Figure 1;
- Figure 1b schematically a section through the snow clearing bar according to Figure 1a along the section line BB in Figure 1;
- Figure 2 schematically shows a side view of a snow clearing bar according to the invention in a second embodiment, partially cut away;
- Figure 2a schematically a section through the snow clearing bar according to Figure 2a along the section line A-A in Figure 2;
- Figure 3 schematic side view of a snow clearing bar according to
- FIG. 3a schematic section through the snow clearing bar according to Figure
- Figure 4 schematically shows a side view of a snow clearing bar according to the invention in a fourth embodiment, partially cut away;
- Figure 4a schematic section through a snow clearing bar according to Figure
- Figure 4b schematically a section through a snow clearing bar according to Figure 4 along the section line B-B in Figure 4;
- Figure 5 schematically a side view of a metallic wear strip designed as a cast piece with cast-in hard metal inserts for the snow clearing strip according to Figure 1;
- Figure 5a schematically a section through the metallic wear strip shown in Figure 5;
- Figure 5b schematically a perspective view of the metallic wear strip shown in Figure 5
- Figure 6 schematically a side view of the metallic wear strip designed as a cast piece with cast-in hard metal inserts and snow sliding ramps for the snow clearing strip according to Figure 4;
- Figure 6a schematically a narrow side view of the metallic wear strip shown in Figure 6;
- Figure 6b schematically a perspective view of the metallic wear strip shown in Figure 6;
- Figure 7 schematic side view of one of the hard metal inserts of the
- Figure 7a schematically a narrow side view of the hard metal insert shown in Figure 7;
- Figure 7b schematically a perspective view of the hard metal inserts shown in Figure 7;
- Figure 8 schematic side view of one of the hard metal inserts with
- Figure 8a schematically a narrow side view of the hard metal insert shown in Figure 8;
- Figure 8b schematically a perspective view of the hard metal insert shown in Figure 8.
- Figure 9a a preferred embodiment of the metallic wear strip with hard metal insert in a front view (partially cut open);
- Figure 9b the metallic wear strip shown in Figure 9a in a
- Figure 9c a section along the line AA in Figure 9a;
- Figure 9d a section along the line B-B in Figure 9a;
- the individual snow clearing blades 1 are each provided with a front steel plate 2 on their front side in the direction of travel of the snow plow and with rear steel plates 3 on their rear side in the direction of travel of the snow plow.
- the front steel plate 2 and the rear steel plate 3 can be fixed together with fastening means not shown in the drawing, e.g. fastening screws, to the lower edge of the clearing blade of a snow plow (also not shown).
- a rubber body 4 is vulcanized between the front steel plate 2 and the rear steel plate 3. Embedded in this rubber body 4 are one or more—three in each of the illustrated embodiments—metallic wear strips 5 with limited mobility. The limited mobility of these metallic wear strips 5 relative to the surrounding steel plates 2 and 3 results from the elasticity of the surrounding rubber mass of the rubber body 4.
- the metallic wear strips 5 are each embedded in the rubber body 4 in such a way that their lower edge 6, referred to as the clearing edge, rests on the road surface to be cleared.
- these lower edges 6 of the metallic Wear strips 5 are each reinforced by hard metal inserts 7, preferably made of tungsten carbide or similar hard metals.
- the metallic wear strips 5 are each designed as one-piece castings made of chilled iron casting, which are provided in their embedding area in the rubber body 4 with anchoring elements in the form of projections 5a, depressions 5b and/or openings 5c that engage positively in the rubber compound.
- the production and positioning of these anchoring elements 5a, 5b and 5c takes place simultaneously with the production of the metallic wear strips 5, namely the casting process, and requires no additional operations.
- the hard metal inserts 7 of the metallic wear strips 5 are fixed in the metallic wear strips 5 by encapsulating them with chilled iron casting and therefore do not need to be soldered or otherwise fastened into receiving openings of the metallic wear strips 5 in a separate operation.
- the particular advantage of the teaching of the invention is that the novel production of the metallic wear strips 5 significantly reduces the total labor required for the production of snow removal strips and at the same time improves their functionality.
- this results in a particularly large contact surface on the road surface 8 to be cleared, thus enabling particularly gentle removal of snow or ice from this road surface 8.
- the hard metal inserts 7 are provided with form-locking elements 7a, which engage positively in the volume of the metallic wear strips 5 and are thereby additionally secured against falling out.
- These form-locking elements 7a can - as shown - be designed as projections. However, they can equally well be formed by recesses, openings or recesses in the body of the hard metal inserts 7.
- the metallic wear strips 5 project downwards over the lower edges of the front steel plate 2 and the rear steel plate 3 and are thickened in the projecting area. This makes it easy to achieve significantly longer service lives for the snow clearing strip thus designed, particularly during so-called black snow clearing.
- the positive engagement of the metallic wear rails 5 in the rubber body 4 is achieved here by curved recesses 5b of the metallic wear strips 7 in their embedding area, which merge upwards and downwards into adjoining projections 5a (thickened portions).
- the additional positive securing of the hard metal inserts 7 in the metallic wear strips 5 is achieved here by the fact that the hard metal inserts 7 are wedge-shaped in cross-section, i.e., they have a wedge-shaped projection 7a that widens towards the top and engages positively with the body of the metallic wear strip 5 made of chilled cast iron.
- the metallic wear strips 5 also project downwards over the lower edges of the front steel plate 2 and the rear steel plate 3 and are thickened in the projecting area. Furthermore, arranged in the surfaces of the front and rear of the metallic wear strips 5 are snow sliding ramps 9a and 9b, respectively, which run parallel to the lower edges of the front steel plate 2 and the rear steel plate 3 and are inclined or curved on their upper sides. These snow sliding ramps 9a and 9b, respectively, ensure, as already described in the introduction to the description, discussed, when using such a snow removal strip for a gradual transition between the surfaces of the wear strip 5 on the one hand and the adjoining surfaces of the front steel plate 2 and the rear steel plate 3 on the other. These sliding ramps 9a and 9b are also integral components of the metallic wear strips 5, each made of chilled cast iron.
- FIGs 5, 5a and 5b show the metallic wear strips 5 used in the snow clearing bar according to Figure 1 before they are vulcanized into the rubber body 4.
- These metallic wear strips 5 are made of chilled cast iron, e.g., GGG-40 LT, are provided in their embedding area with anchoring elements in the form of projections 5a that engage positively with the rubber body 4 of the snow clearing bar 1, and contain the hard metal inserts 7 in the area of their lower edge 6.
- These hard metal inserts 7 are fixed in the volume of the wear strips 5 by encasing the hard metal inserts in the chilled cast iron during the casting of the wear strips 7.
- the hard metal inserts 7 are provided with projections 7a, which, in addition to the material bond, secure the hard metal inserts 7 by positive locking in the volume of the wear strips 5.
- FIGs 6, 6a and 6b show the metallic wear strips 5 used in the snow clearing bar according to Figure 4 before they are vulcanized into the rubber compound of the rubber body 4 of the snow clearing bar 1.
- This metallic wear strip 5 is also made of chilled cast iron (e.g. GGG-40 LT) and is provided in its embedding area with anchoring elements, here in the form of projections 5a and openings 5c, which engage positively in the rubber compound of the rubber body 4 of the snow clearing bar 1.
- these wear strips 5 are provided on their front and rear sides with the aforementioned snow sliding ramps 9a and 9b, which are an integral part of the metallic wear strip 5, i.e., are also made of chilled cast iron.
- the lower edge 6 of the metallic wear strip 5 is reinforced by hard metal inserts 7, which here are designed as simple cuboid blocks cast with chilled cast iron, as can be seen, for example, in Figures 7, 7a and 7b.
- Figures 8, 8a and 8b illustrate once again in detail the hard metal inserts 7 used in the snow clearing bar according to Figure 1, embedded in the wear strip 5 thereof, which are provided with projections 7a which engage positively in the volume of the metallic wear strips 5.
- Figures 9a to 9e illustrate a particular embodiment of the embedding of hard metal inserts 7 in one of the metallic wear strips 5.
- hard metal inserts 7 made of tungsten carbide are provided on their front side 7.1 and their rear side 7.2 with support projections 10.1 and 10.2, which extend at least to the front wall 5a and the rear wall 5b of the metallic wear strip 5.
- support projections 10.1 and 10.2 it is possible to fix the hard metal insert 7 in the correct position in a casting mold during the encapsulation with the chilled iron casting, so that complicated holding devices for positioning the hard metal insert 7 within the casting mold during the casting process can be dispensed with.
- these support projections 10.1 and 10.2 also serve as form-locking elements for fixing the hard metal insert 7 in the volume of the metallic wear strip 5.
- the support projections 10.1 and 10.2 are dimensioned such that they protrude slightly, i.e., at least by the thickness of the coating of the semolina mold, beyond the front wall 5.1 and the rear wall 5.2 of the metallic wear strip 5. This ensures that the hard metal insert 7 can be securely fixed in the volume of the casting mold even if its walls are coated with a coating.
- front steel plate 2a opening in front steel plate
- Hard metal inserts 7a Projections of hard metal inserts 7.1 : Front side of the carbide inserts
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023129588.8A DE102023129588A1 (de) | 2023-10-26 | 2023-10-26 | Schneeräumleiste für den Räumschild eines Schneepfluges |
| PCT/EP2024/080292 WO2025088158A1 (de) | 2023-10-26 | 2024-10-25 | Schneeräumleiste für den räumschild eines schneepfluges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4669809A1 true EP4669809A1 (de) | 2025-12-31 |
| EP4669809B1 EP4669809B1 (de) | 2026-05-13 |
Family
ID=93520592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24805430.6A Active EP4669809B1 (de) | 2023-10-26 | 2024-10-25 | Schneeräumleiste für den räumschild eines schneepfluges |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4669809B1 (de) |
| DE (1) | DE102023129588A1 (de) |
| WO (1) | WO2025088158A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT322618B (de) * | 1971-10-05 | 1975-05-26 | Plansee Metallwerk | Stahlschürfleiste |
| CH582574A5 (de) * | 1973-07-13 | 1976-12-15 | Wahl Hans Dr Ing Verschleiss T | |
| US5027878A (en) * | 1989-10-05 | 1991-07-02 | Deere & Company | Method of impregnation of iron with a wear resistant material |
| DE102004029165A1 (de) * | 2004-06-17 | 2005-12-29 | Gummi Küper GmbH & Co KG | Sandwich-Räumleiste mit Hartmetallkern |
| SE527977C2 (sv) * | 2004-11-10 | 2006-07-25 | Metso Minerals Wear Prot Ab | Snöplogskär och snöplog |
| DE102005040705B4 (de) * | 2005-08-27 | 2021-06-10 | Gummi Küper GmbH & Co KG | Räumleiste für den Räumschild eines Schneepfluges |
| DE102013011436A1 (de) * | 2013-07-10 | 2015-01-15 | Küper Gmbh & Co. Kg | Zweiteiliger Randsteinabweiser |
| DE102016114457A1 (de) * | 2016-08-04 | 2018-02-08 | Küper Gmbh & Co. Kg | Räumleiste für den Einsatz bei hohen Geschwindigkeiten und langen Räumstrecken |
| DE102020125134A1 (de) * | 2020-09-25 | 2022-03-31 | Küper Gmbh & Co. Kg | Räumleiste für den Räumschild eines Schneepfluges |
-
2023
- 2023-10-26 DE DE102023129588.8A patent/DE102023129588A1/de active Pending
-
2024
- 2024-10-25 EP EP24805430.6A patent/EP4669809B1/de active Active
- 2024-10-25 WO PCT/EP2024/080292 patent/WO2025088158A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4669809B1 (de) | 2026-05-13 |
| DE102023129588A1 (de) | 2025-04-30 |
| WO2025088158A1 (de) | 2025-05-01 |
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