Scraper with guide element
The scraper design with a guide element and perpendicular fastening system addresses the issue of material snagging, enhancing handling by guiding material away from the scraper, thus preventing entanglement and maintaining smooth operation.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Filing Date
- 2025-11-26
- Publication Date
- 2026-06-04
AI Technical Summary
Existing scrapers for surface material removal, such as floor covering, often cause the scraped material to catch on the scraper or collide with the operator's hand, impairing handling and movement.
A scraper design featuring a planar scraper element with a guide element projecting from its surface to direct scraped material away, combined with a fastening element that extends perpendicular to the planar surface and is secured by a locking element, preventing snagging and entanglement.
The scraper effectively guides scraped material upwards and away from the fastening element, reducing the risk of snagging and improving handling by ensuring the scraper remains unobstructed during use.
Smart Images
Figure EP2025084291_04062026_PF_FP_ABST
Abstract
Description
[0001] R. 415467
[0002] - 1 -
[0003] Description
[0004] title
[0005] Scraper with guide element
[0006] The invention relates to a scraper, in particular for soil cultivation.
[0007] Scrapers for removing material from a surface are known in the prior art. In particular, scrapers for working on a floor surface to remove a floor covering, such as tiles, are known. Such scrapers can either be handheld or can be clamped into a tool, for example, an electric chisel.
[0008] During surface preparation, the scraper removes material from the surface. The scraped material moves along the top of the scraper as the scraper is moved across the surface. This can sometimes cause the material to catch on the scraper or collide with the operator's hand or the tool. This is not only inconvenient for the operator but also impairs the scraper's handling, as its movement is blocked.
[0009] Various scrapers are known from the prior art, which include devices designed to facilitate the guiding of the scraped material over the scraper.
[0010] US Patent 4,286,383 A discloses a machine-driven peeling device with oscillating motion, preferably for leveling or peeling protrusions occurring on floors, walls, or other surfaces. R. 415467
[0011] - 2 -
[0012] Furthermore, US 2004 / 006875 A1 discloses a scraper blade comprising a beveled edge section, a flat section, a rim section extending outwards from the flat section, and a shaft section that fits into a gripper of a scraper device.
[0013] US 2019 / 174963 A1 discloses a spatula for making an ice roll with a top surface from which a projection protrudes, which, when scraping, strikes the scraped ice and deflects the ice, thereby facilitating the rolling of the same.
[0014] The invention is based on the objective of providing a scraper with improved handling.
[0015] Disclosure of the invention
[0016] The problem according to the invention is solved by a scraper, in particular for soil cultivation, comprising a planar scraper element and a receiving section to which the scraper element is attached by means of at least one fastening element, and comprising a guide element which projects from a planar surface of a first side of the scraper element and which is designed to guide scraped material away from the planar surface and over the fastening element, wherein the fastening element extends perpendicular to the planar surface and through a through-opening in the receiving section and / or in the scraper element and is fixed to the scraper by means of a locking element, wherein the locking element and the guide element are arranged on the first side of the planar scraper element.
[0017] The scraper according to the invention has the advantage that the scraped material is pushed over a top surface or the first side by means of the guide element, whereby snagging of the scraped material with the scraper is prevented. This is achieved in particular by providing a guide surface which directs the material upwards away from the scraper element and over a fastening element arranged behind the guide element in the direction of actuation. At the same time, R. 415467
[0018] - 3 - according to the invention, it is advantageously prevented that the scraper element also becomes entangled on one of the sides facing away from the first side or the top, for example with the substrate, since it is provided that a locking element is arranged on the first side, on which the guide element is also located.
[0019] The first side used with the scraper is usually the top. The locking element protrudes from the scraping element, which can easily cause the scraper to snag. This can be advantageously avoided because, firstly, the locking element is located on the same side as the guide element and is therefore on the top during use, and secondly, the guide element itself acts as a shield or cover for the scraped material from the locking element.
[0020] The scraper is preferably designed for handheld use and / or can be clamped into an electric chiseling tool. For this purpose, the mounting section preferably includes a corresponding handle section and / or a connection section for engagement with a receptacle of the chiseling tool.
[0021] The guiding element has, in particular, a guiding surface designed such that the material scraped off by the scraper element is guided upwards away from the first side or the flat surface during use. The scraper element is, in particular, flat and has a cutting edge. Specifically, the scraper element is designed as a blade.
[0022] The fastening element is specifically designed for the detachable fastening of the scraper element to the receiving section, so that changing the scraper element is possible in a simple manner.
[0023] Preferably, the fastening element is a threaded screw and the locking element is a nut. The threaded screw particularly has a screw head which, on the second side facing away from the first side, R. 415467
[0024] - 4 - or the underside of the scraper. A threaded section of the screw extends from the screw head through the through-hole to the first side or top of the scraper, where the screw is secured by the screwed-on nut. Since the screw head protrudes less from the scraper element or has a lower height than the nut with any threaded section that may extend beyond the nut, it is advantageous that the screw head is located on the underside or on the side where the guide element is not present, in order to reduce the risk of the scraper getting caught on the surface.
[0025] Preferably, the scraper comprises at least two, more preferably at least three, and particularly preferably four, fastening elements. A corresponding through-opening is provided for each fastening element. Preferably, the fastening elements are identical. The fastening elements can be arranged on the scraper in a triangular, quadrilateral, or polygonal shape. For example, four fastening elements can be arranged on the scraper element in a rectangular, square, or trapezoidal shape.
[0026] Preferably, the guide element is an elongated, particularly solid, projection comprising a guide surface arranged obliquely to the flat surface of the first side. The projection extends, in particular, perpendicular to a direction of movement of the scraper when it is used as intended, or parallel to the cutting edge of the scraper element. The guide surface is, in particular, elongated and / or flat and extends parallel to the cutting edge.
[0027] The guide element or projection is in particular solid or formed from a single piece of material. Preferably, in a cross-sectional view perpendicular to a longitudinal extent of the projection or guide element, the projection has a substantially triangular shape.
[0028] Optionally, one or more corners of the triangle may be rounded. Furthermore, one upper surface of the projection may be flat or beveled. R. 415467
[0029] - 5 -
[0030] Preferably, the projection on a side facing away from the guiding surface includes a second side surface which extends perpendicular to the flat surface. Together with the guiding surface and a bottom side of the guiding element, the triangular shape is formed in cross-section.
[0031] Preferably, the scraper, in particular the receiving section, the connecting section, the guide element and / or the scraper element, is made of metal, in particular steel.
[0032] As an alternative to forming the projection from a solid material, the projection can be hollow. In particular, the projection can be formed by a bent flat material, especially a metal sheet, which is bent such that the guide surface and the second surface facing away from the guide surface are formed. Furthermore, an end section of the flat material can be shaped such that it forms a support section, which forms an underside of the projection and rests on the receiving section. The guide surface, the second surface, and the support section here form a triangular shape in a cross-sectional view. Preferably, the second surface and the support surface can also be omitted, and the guiding element has only the guide surface, which is formed by bending an end section of the flat material.The guide surface can have one or more recesses in the edge area through which at least one fastening element extends.
[0033] Preferably, the projection or guide surface is arranged, in particular directly, next to the at least one fastening element. The projection or guide surface is thus positioned close to the fastening element, so that the guide surface shields the fastening element with respect to the scraped material, and the material is pushed along the guide surface over the fastening element. This prevents the material from catching or getting caught on the fastening element.
[0034] Preferably, the maximum height of the guide element in the area of the guide surface is between 10 mm and 20 mm, more preferably between 12 mm and 18 mm, and particularly preferably between 13 mm and 17 mm. Alternatively or additionally, the guide surface is at an angle between 45° and 55°, more preferably between 47° R. 415467
[0035] - 6 - and 53°, particularly preferably between 48° and 52°, arranged to the flat surface of the first side. It has been shown to be advantageous that a guide element with the aforementioned height guides the scraped material well away from the scraper and is suitable for use with common fastening elements.
[0036] Preferably, the maximum height of the guide element or projection is less than the maximum height of the fastening element on the first side. Preferably, the fastening element is arranged next to or behind the guide surface such that an imaginary extension of the guide surface away from the scraper element does not pass through the fastening element or its end.
[0037] Preferably, the guide element is designed separately from the scraper element. The guide element is, in particular, attached to the scraper element or to the receiving section by means of at least one fastening element.
[0038] The receiving section is preferably formed by a step-shaped receiving in the scraper, wherein the fastening section of the guide element is designed to be complementary to the step-shaped receiving in order to be received in it.
[0039] Preferably, the guide element comprises a retaining section, wherein the at least one fastening element extends through the retaining section for fastening the guide element to the scraper element and / or to the receiving section, the retaining section preferably being arranged between the receiving section and the scraper element. Preferably, the retaining section is formed as a flat surface with through-openings that correspond to the through-openings of the receiving section, so that the fastening element can extend through the through-openings of the retaining section and the receiving section.
[0040] Preferably, the maximum height of the fastening element above the flat surface of the first side is between 20 mm and 30 mm, preferably R. 415467
[0041] - 7 - between 22 mm and 28 mm, particularly preferably between 23 mm and 27 mm, wherein preferably a length of the fastening element is between 38 mm and 48 mm, preferably between 40 mm and 46 mm, particularly preferably between 42 mm and 44 mm.
[0042] Preferably, the width of the guide element, particularly in the area of the guide surface, is between 50 mm and 150 mm, more preferably between 80 mm and 130 mm, and most preferably between 100 mm and 120 mm. The width can, for example, be 110 mm.
[0043] Preferably, the width of the scraper element in the area of the cutting edge is between 145 mm and 160 mm, particularly preferably between 150 mm and 155 mm, for example 152 mm.
[0044] Preferably, the cutting angle of the scraper element between an inclined cutting surface and a plane of the planar scraper element is between 27° and 33°, particularly preferably between 28° and 32°, for example 30°.
[0045] Preferably, the receiving section comprises two lateral projections adjacent to the stepped recess. Preferably, the width of each projection parallel to the cutting edge is between 31 mm and 41 mm, more preferably between 33 mm and 39 mm, for example 36 mm.
[0046] Preferably, the distance between the two protrusions is between 26 mm and 34 mm, particularly preferably between 28 mm and 32 mm, for example 30 mm.
[0047] Preferably, the height of the raised areas is between 1.6 mm and 2.4 mm, particularly preferably between 1.8 mm and 2.2 mm, for example 2 mm.
[0048] Preferably, the depth of the protrusions perpendicular to the cut edge is between 12 mm and 20 mm, particularly preferably between 14 mm and 18 mm, for example 16 mm. R. 415467
[0049] - 8 -
[0050] Preferably, the depth of the receiving section perpendicular to the cutting edge in the area of the stepped recess is between 39 mm and 47 mm, particularly preferably between 41 mm and 45 mm, for example 43 mm.
[0051] Preferably, the height of the stepped recess is between 4 mm and 8 mm, particularly preferably between 5 mm and 7 mm, for example 6 mm.
[0052] Preferably, the height of the holding section is between 1 mm and 2 mm, particularly preferably between 1.3 mm and 1.7 mm, for example 1.5 mm.
[0053] Preferably, the width of the projection or guide surface parallel to the cutting edge is between 100 mm and 120 mm, particularly preferably between 105 mm and 115 mm, for example 110 mm.
[0054] Preferably, the projection has a flattened upper surface. Preferably, the depth of the flattened upper surface perpendicular to the cutting edge is between 4 mm and 8 mm, more preferably between 5 mm and 7 mm, for example 6 mm.
[0055] Preferably, the height of the projection above the holding section is between 7 mm and 12 mm, particularly preferably between 9 mm and 11 mm, for example 10 mm.
[0056] Preferably, the guide element has a front surface that extends perpendicularly from the scraper element to the guide surface. Preferably, the height of the front surface is between 4 mm and 6 mm, more preferably between 4.5 mm and 5.5 mm, for example 5 mm.
[0057] Preferably, the distance between a leading edge of the receiving section and the front of the guide element is between 14 mm and 19 mm, particularly preferably between 16 mm and 18 mm, for example 17 mm. R. 415467
[0058] - 9 -
[0059] Preferably, the connecting section of the scraper for engagement with a chiseling tool has a hexagonal cross-sectional shape. Preferably, the connecting section has a diameter between 26 mm and 30 mm, particularly preferably between 27.5 mm and 29.5 mm, for example 28.5 mm.
[0060] Specific embodiments are explained below with reference to the figures. They show:
[0061] Fig. 1 a) a side view of a scraper according to a first embodiment,
[0062] Fig. 1 b) a detail view of section A from Fig. 1 a),
[0063] Fig. 2 shows a top view of the scraper according to the first embodiment,
[0064] Fig. 3 shows a perspective view of the scraper according to the first embodiment,
[0065] Fig. 4 shows a perspective view of the guide element of the scraper according to the first embodiment,
[0066] Fig. 5 a) a perspective view of a scraper according to a second embodiment,
[0067] Fig. 5b) a perspective view of the guide element of the scraper according to the second embodiment,
[0068] Fig. 6 a) a perspective view of a scraper according to a third embodiment, and
[0069] Fig. 6 b) a perspective view of the guide element of the scraper according to the third embodiment.
[0070] Figure 1 a) shows a side view of a scraper 100 according to a first embodiment. The scraper 100 comprises a scraper element 10, which R. 415467
[0071] - 10 - a cutting edge 25 comprises. The scraper element 10 is received on a receiving section 11 of the scraper 100, wherein a connecting section 20 is further arranged on the receiving section 11 for clamping the scraper 100 in a chiseling tool.
[0072] The scraper element 10 is attached to the scraper 100 or a retaining section 21 of the receiving section 11 by means of several fastening elements 12, which are designed as threaded screws. Furthermore, a guide element 13 is attached to the receiving section 11 by means of the fastening elements 12, with the scraper element 10 being arranged in this area between the retaining section 21 and the guide element 13.
[0073] The guide element 13 is attached to the receiving section 11 on a first side 14a, which is a top surface of the scraper 100, and extends from a flat surface of the planar scraper element 10. End sections of the fastening elements 12 also extend from the first side 14a to this flat surface, each of which has locking elements 16 in the form of nuts. Screw heads of threaded screws are arranged on a second side 14b of the scraper element, facing away from the first side 14a.
[0074] The guide element 13 comprises a projection 17 formed from a solid material, with a guide surface extending obliquely at an angle W from the flat surface of the scraper element 10. The angle W is shown in particular in Figure 4. Furthermore, the guide element 13 has a front face 24 which extends perpendicularly to the flat surface of the scraper element towards the guide surface 18.
[0075] Figure 1b) shows the detail view A from Figure 1a). Various parameters of the components of the scraper 100 are shown. These include a height d of two lateral projections 22, which are shown in Figure 2, a height f of a stepped recess of the receiving section 11 in which the guide element 13 and the scraper element 10 are fastened by means of the fastening elements 12, a height s of the fastening elements 12 above the holding section 21, and a maximum height H2 above the flat surface of the R. 415467
[0076] - 11 -
[0077] scraper element 10 and a depth g perpendicular to the cutting edge of the stepped depression.
[0078] With regard to the projection 17, the height k of the projection 17 above the retaining section 21, the maximum height H1 of the projection 17 or of the guide element 13, and the depth n of the projection 17 perpendicular to the cutting edge of a flat top surface 23 are also shown. Furthermore, the height m of the vertical front surface 24 is shown.
[0079] Figure 2 shows a top view of the scraper 100. In this view, the lateral projections 22 and their depth e perpendicular to the cutting edge 25 are particularly visible. Also shown are the width B of the cutting edge 25 and the width I of the elongated projection 17.
[0080] Figure 3 shows a perspective view of the scraper 100. The connecting section 20, which has a hexagonal cross-section and is designed for insertion into a chiseling tool, is particularly visible. It is also shown that four fastening elements 12 with corresponding locking elements 16 are present, each extending through through-openings 15 (not shown in detail) through the receiving section 11 and the holding section 21. The projection 17 is also shown, with its inclined guide surface 18 and flat upper surface 23.
[0081] Figure 4 shows a perspective view of the guide element 13 comprising the projection 17 with the guide surface 18 running at an angle W to the flat surface of the scraper element 10 (not shown here) or the receiving section 22, and the front surface 24 extending from the guide surface 18. The height of the retaining section 22 is also shown, as well as four through-openings 15 for the fastening elements.
[0082] Figures 5a) and 5b) show a perspective view (Fig. 5a) of a scraper 100 according to a second embodiment, which differs from the first embodiment only in the design of the guide element 13. As shown in Figure 5b), the guide element 13 is not made of solid material R. 415467.
[0083] - 12 - formed, but from a bent flat material, which is bent in such a way that the projection 17 is formed with the guide surface 18, the side surface 26 facing away from the guide surface 13 and a support section 27, the latter serving to support the projection 17 on the retaining section 21. Four through-openings 15 are also provided, two of which
[0084] Through-openings 15 are arranged laterally to the projection 17. The guide surface 13 also has lateral recesses 28 through which the fastening elements 12 can extend. Figures 6 a) and b) show different views of a scraper 100 according to a third embodiment. The third embodiment differs from the second embodiment in that the side surface of the projection 17 facing away from the guide surface 18 is omitted. Furthermore, the guide surface has four recesses for the fastening elements 12.
Claims
R. 415467 - 13 - Claims 1. Scraper (100), in particular for soil cultivation, comprising a planar scraper element (10) and a receiving section (11) to which the scraper element (10) is attached by means of at least one fastening element (12), and comprising a guide element (13) which projects from a planar surface of a first side (14a) of the scraper element (10) and which is designed to guide scraped material away from the planar surface and over the fastening element (12), wherein the fastening element (12) extends perpendicular to the planar surface and through a through-opening in the receiving section (11) and / or in the scraper element (10) and is fixed to the scraper (1009) by means of a locking element (16), wherein the locking element (16) and the guide element (13) are arranged on the first side (14a) of the planar scraper element (10).
2. Scraper (100) according to claim 1, wherein the fastening element (12) is a threaded screw and the locking element (16) is a nut.
3. Scraper (100) according to one of the preceding claims, comprising at least two, preferably at least three, particularly preferably four, fastening elements (12).
4. Scraper (100) according to one of the preceding claims, wherein the guide element (13) is an elongated, in particular solidly formed, projection (17) comprising a guide surface (18) arranged obliquely to the flat surface of the first side.
5. Scraper (100) according to claim 4, wherein the projection (17) on a side facing away from the guide surface (18) comprises a second side surface (26) which extends perpendicular to the flat surface. R. 415467 - 14 - 6. Scraper (100) according to claim 4 or 5, wherein a maximum height (H1) of the guide element (13) in the area of the guide surface (18) is between 10 mm and 20 mm, preferably between 12 mm and 18 mm, particularly preferably between 13 mm and 17 mm, and / or wherein the guide surface is arranged at an angle (W) between 45° and 55°, preferably between 47° and 53°, particularly preferably between 48° and 52°, to the flat surface of the first side (14a).
7. Scraper (100) according to one of claims 4 to 6, wherein a maximum height (H1) of the guide element (18) is less than a maximum height (H2) of the fastening element (12) on the first side (14a).
8. Scraper (100) according to one of the preceding claims, wherein the guide element (13) is formed separately from the scraper element (10).
9. Scraper (100) according to claim 7, wherein the guide element (10) comprises a retaining section (21), wherein the at least one fastening element (12) extends through the retaining section (21) for fastening the guide element (13) to the scraper element (10) and / or to the receiving section (11), wherein preferably the retaining section (21) is arranged between the receiving section (11) and the scraper element (10).
10. Scraper(I OO) according to one of the preceding claims, wherein a maximum height (H2) of the fastening element (12) above the flat surface of the first side (14a) is between 20 mm and 30 mm, preferably between 22 mm and 28 mm, particularly preferably between 23 mm and 27 mm, wherein a length of the fastening element is preferably between 38 mm and 48 mm, preferably between 40 mm and 46 mm, particularly preferably between 42 mm and 44 mm.