Scraper blade element for a ground milling machine and ground milling machine having a scraper blade

Abstract

The utility model relates to a kind of scraping strip elements of scraping plate for ground milling machine and a kind of ground milling machine with scraping plate.The scraping strip element has base, multiple ground contact elements, abutting back side, front side and side edge, side edge includes two long side edges and two short side edges, there is one or more fastening elements or fastening element receiver for fastening scraping strip element on the scraping plate of ground milling machine, wherein, scraping strip element has first scraping strip and second scraping strip, which is formed by at least one ground contact element respectively, ground contact element forms the part of front side and the part of one long side edge with its outer surface respectively, and scraping strip element has abutting structure on its abutting back side, which is used to abut on the matching structure formed by bearing plate and includes abutting step formed by base with rear abutting wall and front protection wall, front protection wall is spaced apart from rear abutting wall by distance.

Description

Technical Field

[0001] This utility model relates to a scraping strip element for a scraper in a floor milling machine and a floor milling machine having a scraper. Background Technology

[0002] Ground milling machines, such as road milling machines, recyclers, stabilizers, or surface mining machines, are frequently used in street or road construction or in open-pit mining. They generally have a frame, a cab, multiple travel devices (e.g., tracks and / or wheels), and a drive unit (which may include one or more drive motors). The drive motors may be, in particular, one or more internal combustion engines (especially diesel engines) and / or one or more electric motors, via which the driving energy required for the ground milling machine's travel and working operations is provided.

[0003] This type of ground milling machine is used for milling (and sometimes removing) the surface layer of a subgrade, such as asphalt pavement. For this purpose, the ground milling machine can be specified to include milling rolls rotatably supported in a milling roll box, which are engaged with the subgrade at a milling depth and mill it during operation, or milling operation. For example, the milling rolls can include hollow columns with multiple cutting tool devices on their outer surfaces. The milled material accumulated in the milling roll box is generally conveyed to a transport vehicle via a discharge conveyor belt (either in the working direction or against the working direction) and removed. The rear wall of the milling roll box in the working direction or forward direction of the ground milling machine is generally constructed as a height-adjustable stripping device with scrapers. Ground milling machines with such stripping devices are known, for example, from DE102012012607A1. The stripping device includes a support plate with multiple scraping strip elements alternatively arranged along its lower edge or lower edge region. The support plate may include an upper plate (e.g., pivotable relative to the milling roller box) and a lower plate adjustablely supported on the upper plate. The lower plate is a portion that carries the scraping strip element, or in other words, directly supports the scraping strip element on that portion. During the milling operation or working operation of the floor milling machine, the stripping device may be guided along the resulting milling bed (Fräsbett) scrapingly, and in this way, for example, to prevent milling material from being discharged rearward from inside the milling roller box and remaining on the milling bed in the working direction of the floor milling machine.

[0004] DE102017116757A1 discloses a scraper bar with a cutting element, the cutting portion of which is at least regionally not parallel to the longitudinal axis. DE202010008045U1 discloses a scraper bar with a base having an undercut portion forming an insertion receiving portion for inserting and attaching a shearing element. DE102014007907A1 discloses an arrangement in which a separate form-locking device is attached to a fixing device on at least one scraper bar element and a support plate, the form-locking device having form-locking elements on the scraper bar element and the support plate, wherein the form-locking elements at least partially complementarily engage with each other and at least partially prevent the at least one scraper bar element from moving on the support plate, particularly also in the longitudinal extension direction (i.e., in the horizontal width direction of the stripping device, perpendicular to the working direction of the ground milling machine). Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a feasible solution for further optimizing the operation of a scraper with a support plate and at least one scraping strip element.

[0006] The objective is achieved by a scraping strip element for a scraper in a floor milling machine according to the present invention, and a floor milling machine having a scraper.

[0007] Therefore, the first aspect of this utility model relates to a scraping strip element for a scraper blade of a floor milling machine. When used as intended, the scraping strip element is thus arranged and constructed to be attached to the support plate of the floor milling machine and guided along the sliding or scraping surface on the milling machine during its working operation or milling run. Therefore, the scraping strip element can be a replaceable part, particularly replaceable relative to the support plate. It is understood that multiple scraping strip elements, particularly those with identical structures, can also be arranged in combination on the support plate of the floor milling machine to provide overall protection, particularly protection of the lower edge of the scraper blade (more particularly the support plate). The scraping strip element can also serve as side protection for the support plate, provided that the support plate is constructed for corresponding reception.

[0008] A portion of the scraper element is the base. Here, the base can be, for example, a forging (which may also be reworked if necessary). The base is, in particular, the main load-bearing structure of the scraper element itself and supports multiple ground contact elements. Ground contact elements are those that, when the scraper element is used as intended, contact the surface of the milling machine during milling operation or work and scrape along the surface of the milling machine. Therefore, the ground contact elements are preferably made of a material that is harder and therefore more wear-resistant than the base. For example, this can be cemented carbide, especially metal matrix composites, such as, in particular, tungsten carbide-cobalt cemented carbide (Wolframcarbid-Kobalt-Hartmetall). Alternatively or supplementarily, polycrystalline diamond (PCD, or polycrystalline diamonds) can also be used here, or in particular, thermally stable polycrystalline diamond (TSP) or boron nitride. The base ultimately connects the ground contact elements to the load-bearing plate. For this purpose, the ground contact elements can be securely connected to the base, for example, by welding. Preferably, the scraping strip element itself consists only of a base and a ground contact element, along with a corresponding welded connection structure if necessary.

[0009] The scraping strip element generally includes (particularly formed only by the base) a rearward side, a front side opposite the rearward side, and a side edge connecting the front side and the rearward side. The front side specifically refers to the outer surface of the scraping strip element that points forward in the working direction or milling direction when the scraping strip element is used as intended. Conversely, the rearward side of the scraping strip element specifically refers to the outer surface of the scraping strip element that points rearward in the working direction or milling direction when the scraping strip element is used as intended, thus opposing the front side, and the rearward side (preferably at least in most cases) directly and indirectly abuts against the support plate when used as intended. The side edge, in contrast, refers to the sidewall of the scraping strip element or the outer surface of the scraping strip element through which the outer surfaces of the front side and the rearward side are interconnected. Therefore, while the outer surfaces of the front and rear sides can, at least in most respects, lie in mutually parallel planes, ideally, the faces of the side edges should, at least in most respects, lie in planes angled to the outer surfaces of the front and / or rear sides. It should be understood that the front and rear sides, as well as the side edges, do not necessarily need to extend and / or be constructed completely flat within a single plane. Rather, the foregoing description preferably relates to the orientation of the scraping strip element (which is generally constructed in a hexahedral shape) and the definition and naming of the respective sides.

[0010] The side edges can be two long side edges extending along the longitudinal extension direction of the scraping strip element and two short side edges connecting the two long side edges at their ends. The longitudinal extension direction of the scraping strip element specifically refers to the extension of the scraping strip element along the lower edge of the support plate, or in the horizontal direction, transverse to the working direction or milling direction of the ground milling machine, when it is used as intended. Alternatively or supplementarily, the longitudinal extension direction of the scraping strip element therefore refers to the longitudinal axis of the surface obtained when the front side of the scraping strip element is projected onto the virtual projection plane in a manner that maximizes the area of ​​the front side. The surface can, in particular, be at least substantially rectangular. The longitudinal extension dimension of the scraping strip element corresponds to the longitudinal extension dimension of the scraping strip element in the direction of the mutually parallel longitudinal extension dimensions of the two scraping strips. In representation, the longitudinal extension dimension of the scraping strip element corresponds to the length (not the diagonal) of the rectangle, while the width extension dimension of the scraping strip element corresponds to the height of the rectangle. Alternatively or supplementarily, the longitudinal extension dimension of the scraping strip element may be along and parallel to the direction of the outer edges of the two scraping strips, particularly in the previously described projection of the scraping strip element in the virtual projection plane. The extension dimension of the long side edge, particularly in the aforementioned projection plane, is preferably greater than the extension dimension of the short side edge, especially four times or more.

[0011] A portion of the scraper element is also one or more fastening elements or fastening element receptacles, used when the scraper element is used as specified to secure the scraper element to the scraper blade or the scraper blade's support plate of a floor milling machine, in cases where additional fastening elements and / or fastening element receptacles are used. The fastening element of the scraper element may, for example, be a bolt fixedly connected to the base. The fastening element receptacle may, for example, be one or more openings (or through holes) for inserting or passing through threaded fasteners or similar fastening elements. These openings may or may not have internal threads. The fastening element and / or fastening element receptacle of the scraper element are provided and configured to be part of a releasable fastening structure or releasable fastening device for the scraper element on the support plate.

[0012] The scraping bar element has a first scraping bar and a second scraping bar along its longitudinal edge, which defines the front side, in the longitudinal extension direction of the scraping bar element. The first and second scraping bars specifically refer to the following areas of the scraping bar element: when the scraping bar element is used as intended, these areas form the lower edge of the front side of the scraping bar element in the vertical direction and, in particular, can also directly contact and slide along the milling machine. The first and second scraping bars are preferably formed solely by ground contact elements.

[0013] The first scraping bar extends along a first longitudinal edge of the base, extending in the longitudinal direction. The front side of the scraping bar element abuts against one of the two long side edges of the scraping bar element at the first longitudinal edge. The second scraping bar extends along a second longitudinal edge of the base, extending in the longitudinal direction of the scraping bar element. The front side of the scraping bar element abuts against the other of the two long side edges of the scraping bar element at the second longitudinal edge. Therefore, the scraping bar element comprises a total of two scraping bars, which extend (particularly parallel to each other) in the longitudinal direction of the scraping bar element (particularly along the entire corresponding longitudinal edge of the scraping bar element), and these two scraping bars are offset from each other by a certain distance in the width extension direction of the scraping bar element, or rather, perpendicular to their parallel orientation.

[0014] The first and second scraping strips are each composed of at least one ground contact element, and more particularly, each is composed of multiple ground contact elements arranged directly side-by-side on the base along the longitudinal extension direction of the scraping strip element or the base. It is particularly advantageous that all ground contact elements of the scraping strip element are made of the same material and / or have the same shape. Therefore, all ground contact elements of the scraping strip element are preferably consistent with each other in shape and material.

[0015] Each ground contact element of a corresponding scraper may additionally or alternatively have abutting surfaces constructed to complement each other in the longitudinal extension direction of the scraper element, via which the ground contact elements are arranged to directly abut each other on the base of the scraper element.

[0016] Finally, it is specified that the ground contact element of the scraping strip element forms a portion of the front side of the scraping strip element and a portion of one of the two long side edges with its outer surface. Therefore, the ground contact element is ideally arranged on the scraping strip element such that its outer surface forms the edge region between the front side of the scraping strip element and one of the long side edges. Thus, regarding the outer surface of the scraping strip element, the base in the regions of the front side and the long side edges is ideally completely covered by the ground contact element in the region of the longitudinal edge of the base, or in the region of the face section where the front side and the corresponding long side edge abut against each other on the longitudinal edge, or in the region of the edge thus formed. Therefore, the scraping strip element according to this invention has higher wear resistance in the regions of the two opposing longitudinal edges, and the user can selectively or sequentially fix the scraping strip element to the support plate with one longitudinal edge or the other longitudinal edge vertically downward, or in other words, fix the scraping strip element in two operating positions.

[0017] The scraping strip element may also be specified to have a three-dimensionally shaped abutment structure on its rear abutment side, extending forward and / or backward in a direction perpendicular to the rear abutment side. This abutment structure is designed for form-locking abutment against a mating structure formed by a support plate. Therefore, the abutment structure is suitable for abutting against the mating structure of the support plate in an assembled state. Here, the abutment structure includes an abutment step formed by a base, the abutment step having a rear abutment wall and a front protective wall, the front protective wall being spaced apart from the rear abutment wall via a side wall surface in a forward direction. This results in an abutment structure comprising a plurality of walls or surfaces extending at different distances from each other in a forward direction, extending transversely to the forward direction on the scraping strip element and particularly formed by the base. These walls may be flat or planar and / or extend parallel to each other. The sidewalls that separate these walls can be used to fix the scraper strip elements in position on the support plate, as will be described in more detail below. Therefore, these sidewalls can also be constructed and configured to directly abut against the support plate. Meanwhile, the base itself can provide protection to the abutting structure via a protective wall, as will also be described in more detail below.

[0018] The protective wall, in particular, protects the sidewall of the abutment structure facing forward of the scraper element. For example, protection of the abutment structure itself can be achieved by configuring the base such that the three-dimensionally shaped abutment structure is completely covered by the base in the forward direction. This means that, in this case, the base can be configured, at least partially, to be wider in the forward direction than the base in the height of the abutment structure (at least in the height of the sidewall of the abutment step). Therefore, the base covers the area in the forward direction and, in working use where the scraper element primarily contacts, for example, milling material with its front side and corresponding front longitudinal edge, can cover and thus mechanically protect the abutment step area located rearward in the reverse forward direction, particularly including the protective wall covering the abutment attached to the sidewall. In this way, for example, it can be achieved that even as wear gradually occurs on the scraper element, the abutment structure (particularly in the area of ​​the rear abutment wall and in the area of ​​the sidewall) remains intact.

[0019] By means of a three-dimensionally shaped abutment structure extending forward and / or backward in a direction perpendicular to the rear abutment side of the scraping strip element, for form-locking abutment against a mating structure formed by a support plate, the positioning of the scraping strip element on the support plate can be easily changed. The abutment structure can be constructed in the form of an abutment groove extending along the longitudinal extension direction of the scraping strip element and / or an abutment beam extending along the longitudinal extension direction of the scraping strip element. In the abutment groove, the bottom of the groove forms, for example, a front abutment wall, and the end face of the groove wall forms a rear abutment wall. For example, in the abutment beam, the rear side of the abutment beam opposite to the front side forms a rear abutment wall, and the remaining base connects to the rear wall of the abutment beam in a direction toward the front side to form a front abutment wall. The abutment structure is preferably constructed in a mirror-symmetric manner with respect to a virtual plane extending along the longitudinal extension direction of the scraping strip element, so that form-locking abutment can be achieved in both operating positions of the scraping strip element. Fine structures (e.g., ribs or the like) can also be part of the abutment structure.

[0020] It can be specified that the abutment structure has an anti-movement structure acting along the longitudinal extension direction of the scraping strip element. The anti-movement structure may, for example, include one or more structural elements raised and / or lowered at an angle relative to the longitudinal extension direction, particularly in the form of a three-dimensional deformable portion formed in the base, especially in the region abutting the rear side and / or long side edge. When the scraping strip element is used as specified, it can be specified that there are corresponding complementary mating structures on the support plate, which abut against the three-dimensional deformable portion of the scraping strip element. It can be specified that the scraping strip element has one or more forward-extending and / or rearward-extending three-dimensional deformable abutment structures, particularly vertically, in its long side edge region, for form-locking abutment against the mating structure formed by the support plate of the scraping strip element. Thus, a definite relative position of the scraping strip element on the support plate can be determined, wherein the abutment structure on the scraping strip element is preferably designed such that a definite relative position of the scraping strip element relative to the support plate can be achieved in both operating positions of the scraping strip element. For this purpose, the abutment structure can be constructed, for example, in the area of ​​the two long side edges of the scraping strip element.

[0021] In particular, it is feasible for the anti-movement structure to be constructed as protrusions and / or recesses formed in the sidewall of the abutment step. This can be, for example, as a gap constructed in the sidewall and / or a protrusion protruding from the sidewall transverse to the longitudinal extension direction of the scraping strip element and transverse to the direction from the rear abutment to the front. In this way, one or more stop surfaces can be provided, which extend at least partially transverse to the longitudinal extension direction of the scraping strip element and cooperate with the abutment structure complementaryly constructed on the support plate to form a transverse stop or form-lock, which shape-fits to prevent lateral displacement of the scraping strip element on the support plate, specifically transverse to the forward direction and horizontal displacement. For this purpose, a suitable mating abutment structure can be provided on the support plate. Ideally, the sidewall, especially in the area of ​​such protrusions and / or recesses in the sidewall (which extends transversely to the direction from the rear abutment surface of the scraping strip element to the front), is covered by a protective wall in the direction toward the front of the scraping strip element, so as to protect the area from external influences during operation.

[0022] Preferably, the scraping strip element (particularly the base) has at least one abutment recess on its rear side, the abutment recess being configured to open towards the long side edge and / or into the face of the long side edge and / or towards the sidewall of the abutment step, the abutment recess being part of the three-dimensional abutment structure of the abutment step. Therefore, the abutment recess refers to a partial, particularly non-fully penetrating, recess and / or opening within the rear side. The abutment recess can be configured to open not only towards the rear side but also towards the long side edge and / or sidewall of the abutment step. Thus, the abutment recess is either completely covered or partially (particularly at least by the base) when viewed from the rear side of the scraping strip element towards the front. Advantageously, multiple such notches may exist on the rear side of the scraping strip element, particularly in a top view of the rear side of the scraping strip element, or in the virtual projection plane with the largest area on the rear side. Ideally, the scraping strip element includes at least two such abutting notches, wherein one of the at least two abutting notches may be designed to open toward one long side edge, and the other of the at least two abutting notches may be designed to open toward another long side edge.

[0023] Advantageously, at least one ground contact element of at least one scraper bar has its respective outer surface flush with the outer surface of the adjacent base in a region of one of the long side edges and / or the front region of the scraper bar element. Ideally, all ground contact elements of at least one of the two scraper bars, and in particular all ground contact elements of both scraper bars, are flush with the outer surface of the adjacent base. The base and the at least one ground contact element, and in particular all ground contact elements of one scraper bar and / or the other scraper bar, are respectively non-protruding relative to each other in this region. Particularly preferred is that all ground contact elements of the scraper bar, together with their respective outer surfaces, are arranged on the base in a manner that they are non-protruding relative to the corresponding surfaces in a region of one long side edge and / or the front side of the scraper bar element.

[0024] The scraping strip element can be configured such that it tapers from the front side toward the rear side in a projection plane perpendicular to its longitudinal extension direction. Therefore, the cross-sectional profile of the scraping strip element can be constructed in a trapezoidal form (partially at least partially) perpendicular to its longitudinal extension direction in the section plane, or at least constructed as a trapezoid, wherein "trapezoidal" refers to a cross-sectional profile that, while not necessarily geometrically identical, is substantially approximately trapezoidal. This "tapering" can be formed by the entire scraping strip element or alternatively by the base of the scraping strip element only.

[0025] It is feasible for the regions formed by the base of the long side edges to extend parallel to each other in a projection plane perpendicular to the longitudinal extension direction. However, it is preferable that the regions formed by the base of the long side edges extend at an angle between each other in the range of 45° to 20°, particularly in the range of 35° to 25°, in a projection plane perpendicular to the longitudinal extension direction. Additionally or alternatively, it may be advantageous for the regions formed by the base of the long side edges to extend at an angle in the range of 25° to 10°, particularly in the range of 20° to 15°, in a projection plane perpendicular to the longitudinal extension direction and relative to a symmetrical midline extending in said projection plane. In this case, an undercut is obtained on the base in the direction from the front side of the scraping strip element toward the rear side, thereby reducing wear on the base when the scraping strip element is used as intended.

[0026] Preferably, the scraping strip element is constructed in a mirror-symmetrical manner with respect to a plane of symmetry extending along its longitudinal direction. In this case, the scraping strip element can be used in the same manner in both of its operations, because within the scope of its prescribed use, the relative positions of the base and the corresponding ground contact element with respect to the bearing plate are consistent in both operating positions.

[0027] Alternatively, the scraping strip element may be constructed mirror-symmetrically on the rear side with respect to a plane of symmetry extending along its longitudinal direction, and asymmetrically on the front side in the region of the long side edge, or in other words, the scraping strip element may be constructed such that it is not radially symmetrical along any axis of symmetry extending along its longitudinal direction. In this way, a difference arises between the first operating position (where the first scraping strip faces the foundation) and the second operating position (where the second scraping strip faces the foundation), particularly regarding the relative orientation of the corresponding ground contact elements of the first and second scraping strips with respect to the foundation, especially when the first and second scraping strips themselves are constructed to be identical in shape to each other. Additionally or alternatively, this can also be achieved by designing the at least one ground contact element of the first scraping strip to be different in shape from the at least one ground contact element of the second scraping strip.

[0028] The ground contact elements of the first and second scraping bars may have long and short sides on their outer sides in a plane perpendicular to the longitudinal extension direction of the scraping bar element. The extension dimension of the ground contact element on the long side is correspondingly larger than that on the short side. This configuration and arrangement of the ground contact elements at the base can be specified such that the ground contact elements of the first and second scraping bars form a portion of the front side of the scraping bar element with their long sides and a portion of the corresponding long side edge of the scraping bar element with their short sides, or vice versa. Alternatively, it is feasible that the at least one ground contact element of the first scraping bar forms a portion of the front side with its long side and a portion of one of the long side edges with its short side; while the at least one ground contact element of the second scraping bar forms a portion of the other long side edge with its long side and a portion of the front side with its short side. However, it is particularly advantageous, also for this embodiment, that the individual ground contact elements are configured to be consistent with each other in shape. In this way, by implementing the ground contact elements in a consistent manner, it is possible to achieve different arrangement structures of the at least one ground contact element of the first scraper bar relative to the at least one ground contact element of the second scraper bar.

[0029] The different configurations of the first and second scraper bars in their respective operating positions allow for a feasible solution where, during the operation of the ground milling machine, the function and / or role of the scraper bar element is prominent while other functions and / or roles are secondary. Therefore, for example, it is feasible to arrange the at least one ground contact element of the first scraper bar on its base such that it primarily provides the scraping function when the scraper bar element is in its operating state. In this embodiment, the longitudinal edge formed by the respective at least one ground contact element runs directly on the ground. While this embodiment can achieve particularly good scraping results, it increases the risk of the scraper bar element getting stuck at obstacles that protrude vertically from the ground, even if they are relatively small. Alternatively, it is also advantageous for the at least one ground contact element of the second scraper bar to be arranged on its base such that it primarily provides the sliding function when the scraper bar element is in its operating state. In this implementation, when the scraping strip element is pressed against the ground, a longitudinal edge extending forward along the working direction is formed by at least one corresponding ground contact element at a distance extending vertically relative to the foundation, and the ground contact element approaches but does not contact the foundation in the region of its long side edge. Therefore, an entry slope is provided by the ground contact element in this case, thereby reducing the risk of the scraping strip element getting stuck at obstacles that protrude vertically from the ground, even if they are relatively small. On the other hand, it may increase the risk of the scraping effect being adversely affected, and in particular the risk of failing to scrape relatively small particles.

[0030] Advantageously, the at least one ground contact element of the first scraper bar (particularly the face forming a portion of the front side and a corresponding portion of the long side edge with respect to the at least one ground contact element of the second scraper bar (particularly the face forming a portion of the front side and a corresponding portion of the long side edge with respect to the at least one ground contact element of the second scraper bar) is inclined at different angles relative to each other in a projection plane perpendicular to the longitudinal extension direction of the scraper bar element and relative to an axis of symmetry extending in the projection plane at least on the rear side of the scraper bar element. This is particularly advantageous when the ground contact elements of the first and second scraper bars are aligned with each other.

[0031] The scraping strip element, or at least the base, can have a T-shaped cross-sectional profile perpendicular to the longitudinal extension axis. In this way, the abutment step can particularly have an abutment beam extending along the longitudinal extension direction, projecting in a direction opposite to the frontal direction toward the rear of the base. On the abutment beam, legs formed by the base and projecting transversely to the longitudinal extension direction and transversely from the rear to the front of the scraping strip element can be included on both sides of the abutment beam. These legs thus overlap the abutment beam and extend beyond it in the transverse direction. In particular, the rear side formed by these legs can also be part of the abutment step.

[0032] The first and second scraping bars may each have multiple ground contact elements arranged side by side with each other along the longitudinal extension direction (especially directly) of the scraping bar element. In this way, a scraping bar that extends relatively wide in the longitudinal extension direction of the scraping bar element can be obtained using relatively small or short ground contact elements.

[0033] Another aspect of this utility model relates to a floor milling machine with a scraper, particularly a self-propelled floor milling machine. The scraper may be part of a milling roller box. The scraper may, in particular, form the rear boundary of the internal space of the milling roller box as viewed in the forward direction or milling direction of the floor milling machine, or may be arranged behind the milling roller as viewed in the working direction. It may also be specified that the scraper can be adjusted between a maintenance position with its edge raised relative to the foundation and a working position lowered to the foundation. The following description, within the scope of the accompanying drawings, will exemplarily illustrate feasible structural features of the floor milling machine.

[0034] The scraper includes a support plate and at least one replaceable scraping strip element according to the present invention, disposed at the lower edge of the support plate, as previously described. This means that when the scraper is in its working position lowered onto the foundation, the scraper contacts the foundation via the scraping strip element. The support plate may have a receiving device in the lower region (particularly the edge region) of the support plate in the vertical direction for topographically locking the at least one scraping strip element at least partially along the forward direction of the ground milling machine and acting upward in the vertical direction. Referring to the vertical extension dimension of the scraper, the lower region specifically refers to the lower third, more particularly the lower fifth, of the scraper. The receiving device is preferably configured relative to the scraping strip element such that the scraping strip element is supported on the support plate such that the scraper contacts the foundation only via the scraping strip element and not via the support plate in its working position lowered onto the foundation.

[0035] The specific implementation of the receiving device on the support plate (preferably at least partially complementary to the abutment area of ​​the scraper element) can vary. For example, the receiving device can be configured as a receiving step, particularly having an abutment surface for the scraper element that is offset rearward relative to the front side of the support plate against the forward or working direction of the milling machine. Alternatively or supplementarily, the receiving device can be designed as an abutment groove and / or an abutment structure with ribs or the like. It is also possible that the connection between the scraper element and the support plate can be configured as a dovetail joint or similar form. Furthermore, a portion of the receiving device can be one or more form-locking elements or form-locking structures configured to at least partially (partially form-locking) engage in one or more abutment recesses, preferably included by the scraper element. These form-locking elements can be configured such that they project onto the support plate relative to the surface adjacent to the corresponding form-locking element. The form-locking elements can be at least partially form-locked and complementary to one or more of the abutment recesses.

[0036] If the receiving device is constructed in the form of a receiving step, it is advantageous that the receiving device is at least partially complementary to the abutment step of the scraping strip element. This enables direct form-locking abutment of the abutment step on the support plate and thus achieves particularly reliable positioning.

[0037] Advantageously, the receiving device includes a rear wall surface with a form-locking structure that extends forward and / or rearward relative to the rear wall surface in the direction toward the scraping strip element and / or transversely to the direction toward the scraping strip element, and is constructed complementary to the abutment step of the scraping strip element. This form-locking structure is covered by a base in the direction toward the front of the scraping strip element. In this way, when the scraping strip element is mounted on the support plate, the structure of the receiving device can be protected against mechanical influences, such as those caused by milling the material. The form-locking structure can be formed, in particular, by an abutment structure on the scraping strip element and by a mating abutment structure on the support plate.

[0038] A particularly preferred embodiment is that the scraping bar element, at least in a region of its base, and especially in at least one region together with the ground contact element, forms a rear angle with its lower edge face open relative to the foundation against the working direction of the ground milling machine. This rear angle is particularly in the range of greater than 0° to 20°, and more particularly in the range of 5° to 15°. This protects the base from wear, and if the ground contact element is also constructed accordingly, a scraper capable of achieving particularly good scraping results can be obtained.

[0039] Alternatively or supplementarily, the ground contact element may form an entry angle (Auflaufwinkel) relative to the foundation along the working direction of the ground milling machine, particularly in the range of greater than 0° to 30°, and more particularly in the range of 10° to 20°. This arrangement avoids obtaining a scraper on the ground contact element, instead creating a beveled entry surface that facilitates gliding over relatively small ground obstacles.

[0040] This invention enables the implementation of a method for operating a scraper of a ground milling machine according to this invention as described above.

[0041] The method specifically includes, in step a), loosening the fixing device via which at least one scraper element is fixed to the scraper's support plate in a first operating position, such that during the operation of the milling machine, the scraper element makes ground contact with the ground via the first scraper blade. For example, if the scraper element wears in the area of ​​the first scraper blade or if it is necessary to change the operating characteristics of the scraper element, the scraper element can be released from the first operating position.

[0042] In step b), the same scraper element can now be adjusted to a second operating position on the support plate. This can be done such that, for example, during the operation of a floor milling machine, the scraper element now makes ground contact with the ground via the second scraper blade of the scraper element. For example, the scraper element can be rotated accordingly for this purpose.

[0043] Subsequently, in step c), the scraper element is fixed to the support plate in a second operating position by means of a fastening device. Here, the form-locking connection between the support plate and the abutment step of the scraper element is covered by the base towards the front side of the scraper element, thereby simultaneously protecting the form-locking connection by the scraper element itself (especially by its base). As the ground milling machine continues to operate, it is now in contact with the foundation via the second scraper.

[0044] The method can preferably be further improved such that the relative positions of the at least one ground contact element of the first scraping bar in a first operating position of the scraping bar element, relative to the relative positions of the at least one ground contact element of the second scraping bar in a second operating position of the scraping bar element, are: a) consistent with each other and thus cause the same scraping behavior; or b) different from each other and thus the scraping behavior of the scraper can vary depending on the current operating position of the scraping bar element. Therefore, the method can include altering at least the primary operating characteristics of the scraping bar element mounted on the support plate by changing the positioning of the scraping bar element from the first operating position to the second operating position or vice versa. Attached Figure Description

[0045] The present invention will now be described in more detail with the aid of embodiments shown in the accompanying drawings. The drawings schematically illustrate:

[0046] Figure 1 A side view of a ground milling machine is shown;

[0047] Figure 2 A perspective rear view of a milling roller box with a scraper is shown;

[0048] Figures 3A to 3E A first embodiment of a scraper with scraping strip elements is shown;

[0049] Figures 4A to 4D A second embodiment of a scraper with scraping strip elements is shown;

[0050] Figures 5A to 5D A third embodiment of a scraper with scraping strip elements is shown;

[0051] Figures 6A to 6C A fourth embodiment of a scraper with scraping strip elements is shown;

[0052] Figures 7A to 7E A fifth embodiment of a scraper with scraping strip elements is shown; and

[0053] Figure 8 A flowchart illustrating the method is shown. Detailed Implementation

[0054] In the accompanying drawings, components with the same or the same function are labeled with the same reference numerals. Components that appear repeatedly do not necessarily need to be labeled separately in each drawing.

[0055] Figure 1 A ground milling machine 1 is shown in a side view. The ground milling machine can be, for example, a road milling machine or a cold milling machine, particularly a mid-rotor machine. The ground milling machine 1 can also be designed as a tail-rotor machine. The ground milling machine can have a frame 3, a cab 2, a drive assembly 4, and / or a traveling mechanism 6, and is particularly configured to be self-propelled. The drive energy required for traveling and working operations can be provided by the drive assembly 4. The drive assembly can have one or more internal combustion engines and / or electric motors. The ground 8 to be milled can be milled in the forward direction or working direction A during the working operation of the ground milling machine 1 via milling rollers 9, which are rotatably supported about a rotation axis 10 in the milling roller box 7. The milled material can be transferred from the interior space of the milling roller box 7 to a transport vehicle (not shown) via a discharge conveyor 5 and then removed by said transport vehicle.

[0056] Figure 2The feasible construction and working principle of the milling roller box 7 are illustrated by way of example. The milling roller box 7 may be bounded by side plates 13 on both sides intersecting with the geometric axis of rotation 10 of the milling roller 9. The rear side along the working direction A may be formed substantially by the scraper 14 of the milling roller box 7. The scraper 14 may have a support plate 20. The scraper 14 may be adjustable relative to the milling roller and / or the frame between an elevated maintenance position and a lowered working or scraping position on the foundation by means of a height adjustment device 15 (e.g., at least one hydraulic cylinder).

[0057] During operation of the ground milling machine 1, the ground 8 is removed by means of a cutting tool device (not shown) mounted on the milling roller 9 by means of the rotation of the milling roller, and the loose milled material is removed, for example, via the unloading conveyor belt 5. Milling marks 18 are formed in the soil 8, having milled edges 11, sidewalls 19, and a milling machine 12. The depth of the milling machine 12 depends on the milling depth set by the ground milling machine 1. The scraper 14 can be matched to the milling depth by means of a height adjustment device 15. For this purpose, the scraper 14 can be guided directly on the milling machine 12 in a scraping manner. This may cause a relatively high wear load in the area of ​​the lower edge 16 of the scraper.

[0058] To protect the scraper 14 from wear, scraper strips 17 may be included, particularly in the area of ​​the lower edge 16 (during the operation of the ground milling machine 1, or milling operation, the scraper 14 scrapes along the working direction A on the milling machine 12 with the lower edge of the scraper 14), on the support plate 20. The scraper strips 17 may include one or more scraper strip elements 21 arranged side-by-side on the support plate 20. Furthermore, one or more side protection elements may be provided, which can contact the milling edges 11 and sides 19 protruding from the milling machine 12 and protect the support plate from wear. These side protection elements may also be formed by corresponding scraper strip elements 21. The scraper strips 17 are located on the front side of the scraper 14 along the working direction A. In other words, the scraper strips 17 are particularly located on the side of the scraper 14 facing the interior space of the milling roller box 7 and therefore towards the milling roller 9.

[0059] Figures 3A to 7E The illustration shows implementation details of different embodiments and feasible configuration alternatives of the scraper 14, and in particular the scraping strip element 21 of the scraping strip 17, and the support plate in the area abutting the corresponding scraping strip element 21.

[0060] Figure 3A First, a possible construction of the support plate 20 is shown in perspective. It should be noted that, as... Figure 3A The support plate 20 shown can be constructed exactly as illustrated or (particularly in the width and height directions) larger, such as... Figure 3AAs indicated by the dashed outline shown. This also applies to embodiments of the support plate 20 that are illustrated in more detail in other figures, even though the dashed outline is not shown separately for clarity. The support plate 20 may have various elements and / or areas, such as the support base plate 22, the support front plate 23, and the locking strip 24. These elements and / or areas may be interconnected, particularly in a manner that is non-destructively separable, and / or may be constructed as a single, solid piece.

[0061] exist Figure 3A In the middle, facing the observer is the lower region of the front side 28 of the support plate 20. Therefore, during operation, this side particularly faces the interior space of the milling roller box 9, as described above. On the front side 28, as part of the receiving device 25, the support plate may have a receiving step 26, which is at least partially recessed in a rearward direction 29 relative to the surface adjacent to the front side 28 of the receiving device 25. The receiving step may have a step height 30 perpendicular to the surface of the front side 28. Therefore, the receiving step may particularly be a gap in the region of the lower edge 31 of the support plate 20, such as... Figure 3A As shown by the dotted outline 32. The receiving step can form a mating structure for at least partially engaging one or more scraping strip elements 21, as shown in more detail in the following figures.

[0062] The receiving step 26 may have a rear wall surface 33 that defines the receiving step 26 against the working direction A and a top wall surface 34 that defines the receiving step 26 upward in the vertical direction, the rear wall surface and the top wall surface may be perpendicular to each other. One or more openings 35 of one or more fixing element receiving portions may be located in the region of the rear wall surface 33, as described in more detail below. The receiving step 26 may also include a mating structure 27, which is formed, for example, by a locking strip 24, and may exemplary have a three-dimensionally shaped portion of the abutment surface or outer surface of the receiving step 26 extending along or against the working direction A and / or transverse to the working direction. These structures may be configured to at least partially topographically lock against the abutment structure 48 formed by the scraping strip element 21, as described in more detail below, when the scraping strip element 21 is mounted or attached to the support plate 20 in a prescribed manner. In particular, this mating structure may have one or more three-dimensional structures, for example, in the form of one or more recesses and / or protrusions, by means of which an anti-movement structure can be obtained, which form-lockingly prevents the scraping strip element 21 abutting against the mating structure from moving in the lateral or horizontal direction and laterally to the forward or working direction A. For this purpose, the mating structure may in particular include a pressing surface extending substantially laterally to the forward direction A and formed by a top wall surface 34, which, in conjunction, transmits the supporting force vertically downward and forward in the forward direction from the support plate 20 to the scraping strip element 21 form-lockingly abutting against the support plate.

[0063] Ideally, when the scraping strip element 21 is received on the ground milling machine 1 by the receiving device 25 and, in particular, by the receiving step 26, the form-locking between the scraping strip element 21 and the support plate 20 exists at least against the working direction A, upward in the vertical direction and along the rotation axis 10 in the horizontal direction, so that a supporting force can be applied to the scraping strip element 21 from the support plate 20, which counteracts the lateral movement of the scraping strip element 21.

[0064] For example in Figure 3B and Figure 3C The first embodiment provides feasible construction details of the scraping strip element 21. Figure 3B A perspective view of the scraped strip element 21 against the rear side 39, and Figure 3C for Figure 3B A cross-sectional view taken along the line of sight I, with the cutting plane S.

[0065] The scraping strip element 21 may have a longitudinal extension dimension L along its length and a width extension dimension B along its width. The longitudinal extension dimension L substantially corresponds to the length of the scraping strip element 21, or, when the scraping strip element 21 is positioned on the support plate in a predetermined manner, the extension dimension of the scraping strip element along the lower edge 31 of the support plate 20 in a horizontal direction transverse to the working direction A. The width extension dimension B corresponds to the extension dimension of the scraping strip element 21 along the lifting direction between the maintenance position and the working position or scraping position of the scraper 14, perpendicular to the longitudinal extension dimension L. Furthermore, the scraper 14 may have a thickness extension dimension D along its thickness extension direction, which is perpendicular to both the width extension direction B and the longitudinal extension direction L. The scraping strip element 21 is preferably configured such that L>B>D.

[0066] in particular, Figure 3C Further details of a feasible basic construction of the scraping bar element 21 are also shown. The scraping bar element 21 may have a base 37 and a plurality of ground contact elements 38 fixedly connected to the base 37 (particularly via welded connections). The base 37 may be, for example, a forging, particularly a post-processed forging, and the base may be made of steel. The ground contact elements 38 may be made of hard metal, particularly.

[0067] The scraping strip element 21 may include a rear side 39, a front side 40 opposite to the rear side 39, and a side edge 41. The side edge 41 refers to the following sides of the scraping strip element 21, through which the front side 40 is connected to the rear side 39. The side edge 41 may have two opposing long side edges 42 extending in the longitudinal extension direction L and two opposing short side edge surfaces 43 extending in the width extension direction B. The transition portions extending in the longitudinal extension direction L of the scraping strip element 21 between the front side 40 and the corresponding long side edges 42 and 43 are formed by a first longitudinal edge 46 or a second longitudinal edge 47, respectively. The first longitudinal edge 46 may be part of the first scraping strip 44, which in this embodiment is formed by a plurality of ground contact elements 38 arranged side-by-side and adjacent to each other along the longitudinal extension direction L. The second longitudinal edge 47 may be part of the second scraping strip 45, which in this embodiment is also formed by a plurality of ground contact elements 38 arranged side-by-side and adjacent to each other along the longitudinal extension direction L. The first longitudinal edge 46, or the first scraping strip 44, may extend parallel to the second longitudinal edge 47, or the second scraping strip 45, and may extend particularly along the corresponding edge regions of the front side 40 and the corresponding long side edge 42 in the longitudinal extension direction L. Therefore, the scraping strip element 21 simultaneously includes two scraping strips 44 and 45 that are perpendicular to each other in the longitudinal extension direction L of the scraping strip element 21, as explained in more detail below. This allows the scraping strip element 21 to be used in two different operating positions relative to the support plate 21.

[0068] The rear side 39 of the scraping strip element 21 may include an abutment structure 48, particularly, for example... Figure 3BAs shown. The abutment structure 48 represents a three-dimensional configuration with protrusions and / or recesses on the abutment surface abutting the rear side. The protrusions and / or recesses may extend along the longitudinal extension direction L and / or the width extension direction B and / or the thickness extension direction D. In this embodiment, in addition to the abutment beam 49 protruding along the thickness extension direction D and extending longitudinally along the longitudinal extension direction L, the abutment structure 48 also includes a plurality of abutment recesses 50 entering the sidewalls 51 of the abutment beam. The abutment recesses 50 are embedded in the sidewalls 51 of the abutment beam 50 extending along the longitudinal extension direction L and are respectively constructed to be open in the width extension direction B and toward the rear side 39. In terms of its three-dimensional profile, the abutment recess 50 can be configured to complement the abutment protrusion 52 in the abutment strip 24 of the support plate 21. In the assembled state of the scraping strip element 21, the abutment protrusion is inserted transversely into the abutment recess 50 of the scraping strip element 21 in the longitudinal extension direction L, and in particular, in this manner, together they form an anti-movement structure 55 for the scraping strip element 21 relative to the support plate 20 in the longitudinal extension direction L. Therefore, the abutment protrusion 52 can be part of the form-locking structure 70 on the support plate 20, which is configured to form-lock abut with the abutment step 65 of the scraping strip element 21. The form-locking structure 70 can therefore be formed in a form-locking manner, particularly by the abutment structure 48 and the mating abutment structure 48. The abutment recess 50 and the abutment protrusion 52 can be completely covered by the base 37 toward the front side 40 of the scraping strip element 21. For example, a recess 68 is thus obtained by means of abutting a notch 50, which can be used to ensure form-locking. In addition to or alternative to one or more recesses 68, one or more structures (e.g., pins, etc.) protruding from the sidewall 51 may also be used to ensure form-locking.

[0069] The scraping strip element 21, especially the base 37, can have an integrally T-shaped cross-sectional profile 71, for example, Figure 3C As shown. This can be achieved by an abutment beam having a rear abutment wall 66 extending in the opposite direction to the front side, and a sidewall 51 extending transversely to the abutment wall and in the longitudinal direction, the sidewall opening towards the front into a front protective wall 67 formed by the base 37 on the rear side, the front protective wall extending transversely in the longitudinal direction and protruding from the abutment beam on two opposing sides in the direction towards the front. Therefore, the rear abutment wall 66, at least one sidewall 51 adjacent thereto, and at least one front protective wall 67 adjacent to the at least one sidewall 51 can together form an abutment step 65, the support plate being constructed in the receiving area 25 to at least partially complementarily receive the abutment step. In principle and regardless of the specific embodiment, it is preferred that one or more sidewalls 51 are sized such that the scraping strip element 21 does not rest against the support plate with or only with the surface formed by the protective wall 67, but is instead separated from the support plate by an air gap in the direction toward the front of the scraping strip element 21.

[0070] The scraping strip element 21 can be constructed mirror-symmetrically with respect to a plane of symmetry C extending along the longitudinal extension direction L and the thickness direction D, for example, as shown in the figure. Figure 3C As shown. Therefore, the support beam 49 also includes two opposing sidewalls 51 that extend parallel to each other along the longitudinal extension direction L, each sidewall including an abutment recess 50 that is complementary to the abutment protrusion 52.

[0071] To mount the scraping strip element 21 onto the support plate 20, the scraping strip element 21 may, for example, have multiple fastening element receiving portions 54 as part of the fastening device 56. The fastening element receiving portions 54 may be one or more through openings extending from the front side 40 through the base 37 to the rear side. Fastening element receiving portions 54 with a corresponding configuration may also be provided on the support plate 21, for example, in the form of openings 35.

[0072] Figure 3D An exemplary fully assembled fastening device is shown, wherein, Figure 3D This is a cross-sectional view of the scraper 14, extending transversely to the longitudinal extension direction L (or in a section extending along the working direction A and vertically), with the scraper element 21 mounted on the support plate 20. The section can correspond to... Figure 3B The cutting surface S in the figure. The fastening element 53 (e.g., a threaded fastener) can be guided through two openings 35 and 54. Viewed along the working direction A, it can be secured by a nut on the rear side of the support plate 20. The threaded fastener can be a fastening bolt and / or a flat-head bolt. It can have a polygonal profile, such as a quadrilateral profile, in the threaded shaft to prevent rotation. Therefore, one or more through openings in the base and / or openings 35 in the support plate can have a polygonal cross-sectional profile constructed at least partially complementary to it. The nut can be, for example, a self-locking nut. Therefore, the fastening device 56 is ideally constructed to be disassembled without damage. Figure 3D Further illustrating that the scraping strip element 21 (e.g., due to its described embodiment) can be mounted on the carrier plate in two alternative operating positions. Figure 3D In the operating position shown, the second longitudinal edge 47 is located on the lower vertical end of the scraper 14. However, it is also possible to arrange the scraping strip element 21 on the support plate 20 such that the first longitudinal edge 46 is located on the lower vertical end of the scraper 14. Therefore, the scraping strip element 21 can be arranged upside down on the support plate 20.

[0073] in particular Figure 3DThe base 37 is also shown to be configured such that the abutment area formed by the abutment step 65, or its abutment structure, completely overlaps and is thus protected along the direction from the rear to the front of the scraping strip element 21. This also applies to the mating abutment structure on the support plate 20, and in particular to the locking strip 24.

[0074] The specific configuration of the base 37 and / or the ground contact element 38 can also be varied. (Based on...) Figure 3C As can be seen from the cross-sectional view perpendicular to the longitudinal extension direction L, the scraping strip element 21 can have a generally trapezoidal profile, wherein the base of the trapezoid can be formed particularly by the front side 40, and the legs of the trapezoid can be formed by the long side edges 42. This also applies to the projection of the scraping strip element 21 in a virtual projection plane extending perpendicular to the longitudinal extension direction L.

[0075] Additionally or alternatively, the scraping strip element 21 or at least the base 37 may be configured such that the surface of the long side edge 42 (e.g., in a projection in a virtual projection plane extending perpendicular to the longitudinal extension direction L or in a cross-sectional view) (e.g. Figure 3C The two side surfaces 42 (as shown) are at an angle E to each other and approach each other when viewed from the front side 40 to the rear side 39, or in other words, the scraping strip element 21 or at least the base 37 tapers in said direction. The angle E can be, for example, in the range of 45° to 5°, particularly in the range of 45° to 20°. Alternatively or additionally, one and / or the other of the two side surfaces 42 can extend at an angle F with respect to the plane of symmetry C. The angle F, or its value, can be, for example, in the range of 25° to 2.5°, particularly in the range of 25° to 10°. It can be advantageous for the angle F of the two side surfaces to be at least the same in value.

[0076] exist Figures 3A to 3E The embodiments shown also illustrate that the ground contact element 38 may transition flush with the corresponding outer surface of the base 37 in the region of its outer surface on the respective side edge surface 42 and / or on the front side 40, or may be flush with said outer surface.

[0077] During milling operation, or when scraper 14 (e.g., according to...) Figure 3E As shown in the side view, when the scraping bar element 21 scrapes along the working direction A on the foundation 8 with one of its scraping bars 44 / 45 or its longitudinal edges 46, 47, it can provide a rear angle (Freiwinkel) G and thus resist ground contact of the base 37 during operation. In this embodiment, the rear angle G extends over the base 37 and the ground contact element 38. In this way, the front longitudinal edge 46 of the scraping bar element 21 scrapes directly across the foundation, thereby achieving a particularly good scraping effect.

[0078] Figures 4A to 7E Involving in Figures 3A to 3E Alternative embodiments of the carrier plate 20 and scraping strip element 21 described herein are described. Accordingly, each embodiment in these embodiments refers to the foregoing description, and the following description focuses on the existing relevant differences in more detail.

[0079] According to Figures 4A to 4D A significant difference in the embodiments is that a substantially flat, independent surface is provided in the area of ​​the abutment structure 48 on the rear side 39, and for example, there is no abutment beam. Therefore, in this embodiment, the abutment recess 50, which is part of the abutment step 65, also extends into the long side edge 42 or is constructed openly in the area of ​​the long side edge 42. From a visual perspective, Figure 4A Corresponding to Figure 3A , Figure 4B Corresponding to Figure 3B , Figure 4C Corresponding to Figure 3D , Figure 4D Corresponding to Figure 3C .

[0080] according to Figures 5A to 5D The illustrated embodiment is characterized in that the anti-movement structure 55 is not achieved via the abutment protrusion as part of the locking bar described above, but rather the receiving device 25 has receiving pins 57 that protrude forward in the face of the rear wall surface 33 of the receiving step 26. These receiving pins can be constructed as sleeves and each has an opening 35 for receiving, for example, a threaded fastener. A receiving recess 58 complementary to the receiving pins 57 can be provided on the abutment rear side 39 of the scraping bar element 21. From a visual perspective, Figure 5A Corresponding to Figure 3A , Figure 5B Corresponding to Figure 3B , Figure 5C Corresponding to Figure 3D , Figure 5D Corresponding to Figure 3C .

[0081] According to Figures 6A to 6C In one embodiment, a groove 59 extending in the longitudinal direction L is provided in the area of ​​the receiving step 26 within the support plate 20, and a scraping strip element 21 is engaged in the groove by a retaining beam 49. The groove 59 and the retaining beam 49 can be constructed with complementary, particularly effective, form-locking elements in the longitudinal direction L, such as those described in the preceding embodiments, to obtain, for example, an anti-movement structure. From a visual perspective, Figure 6A Corresponding to Figure 3A , Figure 6C Corresponding to Figure 3D, Figure 6B Corresponding to Figure 6A The view shows that, in this case, the scraping strip element 21 is attached to the carrier plate 20 in a prescribed manner.

[0082] Figures 6A to 6C Another feature of the illustrated embodiment is that the support plate 20 is chamfered or beveled in its lower edge region. Thus, the rear angle G can extend further beyond the scraping strip element 21 against the working direction A in the region where it connects to the scraping strip element at the lower edge of the support plate 20 (particularly without a protruding portion), as shown in the embodiment. Figure 6C The cross-sectional view is shown.

[0083] according to Figures 7A to 7E The special feature of this embodiment is that, relative to the second scraper bar 45, the first scraper bar 44 is constructed differently in its relative orientation to the rear side 39, which is still mirror-symmetrically constructed with respect to the scraper bar element 21, and is not mirror-symmetrically constructed along the symmetry plane C extending along the longitudinal extension direction L and the thickness extension direction D. From a viewing perspective, Figure 7A Corresponding to Figure 3C , Figure 7B and Figure 7C Corresponding to Figure 3D , Figure 7D and Figure 7E Corresponding to Figure 3E .

[0084] Even though the ground contact elements 38 of the first scraper bar 44 and the second scraper bar 45 can (but do not necessarily) be constructed to be identical to each other, the first scraper bar 44 and the second scraper bar 45 can also be oriented differently from each other with respect to the aforementioned plane of symmetry C. As per... Figures 7A to 7E As shown in the embodiment, the ground contact element 38 can be located in a projection plane that extends perpendicular to the longitudinal extension direction L (e.g., Figures 7A to 7E The plane of the diagram has, for example, a long side 60 and a short side 61. For example, from Figure 7A As can be seen, the short side 61 of the ground contact element 38 of the first scraper 44 is located on the front side 40, while the long side 60 is located on one side of the long side edge 42. In contrast, the ground contact element 38 of the second scraper 45 is oriented such that the short side 61 of the ground contact element of the second scraper is located on one side of the long side edge 42, while the long side 60 is located on the front side 40. Furthermore, the short side 61 of the ground contact element 38 of the first scraper 44 is oriented such that it is coplanar with the outer surface formed by the base 37 and connected to the ground contact element 38. For example, this outer surface may be substantially perpendicular to the plane of symmetry C abutting the rear side 39. In contrast, the long side 61 of the second scraper 45 is at an angle to this plane of symmetry.

[0085] Therefore, the difference between the two feasible operating positions of the scraper element 21 described above is that the relative orientation of the ground contact element 38 forming the lower edge of the scraper 14 with respect to the bearing plate 20 or the foundation 8 is different from each other.

[0086] to this end, Figure 7B The first operating position is shown in a cross-sectional view, which substantially corresponds to the operating position of the aforementioned embodiment. In particular, the rear angle G, as explained above, can also be implemented here. Therefore, a scraping function can be provided at this position. Figure 7E This is shown in more detail in a side view.

[0087] In contrast, Figure 7C In the middle, the portion of the longitudinal edge formed by the long side 60 of the ground contact element 38 extends in different ways, particularly extending substantially parallel to the plane of symmetry C. For example, according to... Figure 7D As shown in more detail in the side view, in ground contact, this results in an entry ramp being obtained through the area of ​​the long side edge 42 formed by the ground contact element 38. The long side edge 4 is not in ground contact with its forward long edge along the working direction A, but with its rear long edge along the working direction A. Therefore, an opening angle or entry angle H is formed between the long side edge 42 of the ground contact element 38 and the foundation, which opens forward along the working direction A. Relatively small obstacles protruding vertically from the foundation can be better slid over by the scraper 14 in this way, so that this operating position also provides a sliding function.

[0088] at last, Figure 8 The steps of a method 36 for operating a ground milling machine with scraper 14 as described above are illustrated by way of flowchart.

[0089] In the first step, it can be specified that: firstly, the fastening device 56 62 is loosened, via which at least one scraper element 21 is fastened to the support plate 20 of the scraper 14 in the first operating position such that, during the operation of the floor milling machine 1, the ground contact of the scraper element 21 with the ground is achieved via the first scraper 44 of the scraper element 21. The loosening 62 may, for example, include loosening the threaded connection.

[0090] In a further step, it can now be specified that the scraper element 21 is adjusted 63 to a second operating position on the support plate 20 such that during the operation of the floor milling machine 1, the ground contact of the scraper element 21 is made via the second scraper 45 of the scraper element 21. For example, the adjustment can be a rotation or flipping of the scraper element 21.

[0091] Finally, it can be specified that the scraper element 21 is secured 64 to the second operating position on the support plate 20 by means of the fastening device 56 (e.g., by tightening the previously loosened fastening device 56). During subsequent operation, the second scraper 45 now makes ground contact. Simultaneously, the base can provide coverage of the front side of the scraper element, which is in a form-locking connection between the support plate and the abutment step of the scraper element.

[0092] Step 63 can be specified such that the relative position of the first scraper strip or its ground contact element with respect to the foundation and / or support plate 20 in the first operating position is the same as the relative position of the second scraper strip or its ground contact element with respect to the foundation and / or support plate 20 in the second operating position. In this way, the operating characteristics of the scraper strip element 21 are identical in both operating positions. However, it can also be specified that the relative position of the first scraper strip or its ground contact element with respect to the foundation and / or support plate 20 in the first operating position is different from the relative position of the second scraper strip or its ground contact element with respect to the foundation and / or support plate 20 in the second operating position. Thus, the two feasible operating positions of the scraper strip element 21 can have different operating characteristics, for example, one operating position having more scraping function and the other operating position having more gliding function.

[0093] Figure 5D Further feasible improvements applicable to all embodiments are shown. Specifically, it can be specified that the scraper bars 44, 45 may be rounded or have a rounded portion R in the region of their longitudinal edges 47. The radius of the rounded portion may be, in particular, 0.8 mm or greater.

[0094] List of reference numerals

[0095] 1. Ground milling machine

[0096] 2 driver's cab

[0097] 3 racks

[0098] 4 Drivetrain

[0099] 5 Unloading Conveyor Belt

[0100] 6. Driving device

[0101] 7 Milling Roller Box

[0102] 8 ground

[0103] 9 milling rollers

[0104] 10 Rotation axis

[0105] 11 Milling the edge

[0106] 12 Milling Machine

[0107] 13 side panels

[0108] 14 scrapers

[0109] 15 Height Adjustment Device

[0110] 16-board bottom edge

[0111] 17 Scraping Strips

[0112] 18 milling marks

[0113] 19 side walls

[0114] 20 bearing plate

[0115] 21 Scraper Strip Components

[0116] 22 Bearing Base Plate

[0117] 23 Load-bearing front plate

[0118] 24 Lock Bar

[0119] 25 Receiving Device

[0120] 26 Reception Steps

[0121] 27. Fitting Structure

[0122] 28 front side

[0123] 29 rear side

[0124] 30 steps

[0125] 31 lower edge

[0126] 32 outline

[0127] 33 Rear wall

[0128] 34 top wall surfaces

[0129] 35 opening

[0130] 36 methods

[0131] 37 base

[0132] 38 Ground contact elements

[0133] 39 attached to the back side

[0134] 40 front side

[0135] 41 side edge

[0136] 42 long side edge

[0137] 43 Short side edge

[0138] 44 First scraper bar

[0139] 45 Second scraper bar

[0140] 46 First longitudinal edge

[0141] 47 Second longitudinal edge

[0142] 48-adhesion structure

[0143] 49 Beams

[0144] 50 against the notch

[0145] 51 sidewalls

[0146] 52 close to the convex part

[0147] 53 Fastening Components

[0148] 54 Fastening Component Receiving Section

[0149] 55 Anti-movement structure

[0150] 56 Fastening Device

[0151] 57 Acceptance Sales

[0152] 58 Receiving Recess

[0153] 59 stickers for the groove

[0154] 60 long side

[0155] 61 short side

[0156] 62 Release

[0157] 63 Adjustment

[0158] 64 Fastening

[0159] 65 against the steps

[0160] 66 after sticking to the wall

[0161] 67 Front Protective Wall

[0162] 68 convex part / concave part

[0163] 70 Receiving device form-locking structure

[0164] 71T-shaped cross-sectional profile

[0165] A Working / Milling / Forward Direction

[0166] B width extension dimension

[0167] C-symmetric plane

[0168] D Thickness Extension Dimensions

[0169] E contraction angle

[0170] The angle between F and the plane of symmetry

[0171] G rear corner

[0172] H opening angle

[0173] L-length extension dimension

[0174] R-shaped rounded section

[0175] S-section

Claims

1. A scraper strip element for a scraper blade of a floor milling machine, said scraper strip element having: - base (37), and - Multiple ground contact elements supported by the base (37), in, The scraping bar element (21) has: - The rear side (39) formed by the base (37). - The front side (40) opposite to the rear side (39), and - A side edge (41) connecting the front side (40) to the rear side (39), the side edge including two long side edges (42) extending along the longitudinal extension direction (L) of the scraping strip element (21) and two short side edges (43) connecting the two long side edges (42) to each other at their ends. And there are one or more fastening elements (53) or fastening element receiving parts (54) for fastening the scraper element (21) to the scraper (14) of the ground milling machine (1), Its features are, The scraping bar element (21) has a first scraping bar (44) and a second scraping bar (45) along the longitudinal edge that defines the front side (40) in the longitudinal extension direction (L) of the scraping bar element (21), wherein, - The first scraping bar (44) extends along the first longitudinal edge (46) of the base (37), and the front side (40) abuts against one of the two long side edges (42) at the first longitudinal edge. - And the second scraping bar (45) extends along the second longitudinal edge (47) of the base (37), and the front side (40) abuts against the other long side edge (42) of the two long side edges at the second longitudinal edge. - The first scraping bar (44) and the second scraping bar (45) are respectively formed by at least one ground contact element (38). - The ground contact element (38) forms a portion of the front side (40) of the scraping strip element (21) and a portion of one of the two long side edges (42) on its outer surface, and - The scraping strip element (21) has a three-dimensionally shaped abutment structure (48) on its abutment rear side (39) extending forward and / or backward in a direction perpendicular to the abutment rear side (39), the abutment structure being used to form-lock abut against the mating structure (27) formed by the support plate (20), the abutment structure including an abutment step (65) formed by the base, the abutment step having a rear abutment wall (66) and a front protective wall (67), the front protective wall being spaced apart from the rear abutment wall (66) in a direction toward the front side (40) via the side wall surface (19).

2. The scraping strip element for a scraper in a floor milling machine according to claim 1, Its features are, The base (37) is configured such that the three-dimensionally shaped abutment structure (48) is completely covered by the base (37) in the direction toward the front (40).

3. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The three-dimensionally formed abutment structure (48) is constructed in the form of an abutment groove extending along the longitudinal extension direction (L) of the scraping strip element (21) and / or an abutment beam (49) extending along the longitudinal extension direction (L) of the scraping strip element (21).

4. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The abutment structure (48) has an anti-movement structure (55) that functions along the longitudinal extension direction (L) of the scraping strip element (21).

5. The scraping strip element for a scraper in a floor milling machine according to claim 4. Its features are, The anti-movement structure (55) is constructed as a protrusion and / or a recess (68) formed in the side wall (19) of the abutment step (65).

6. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2, Its features are, The scraping strip element has at least one abutment recess (50) on the rear abutment side (39), which is part of the three-dimensional abutment structure (48) of the abutment step (65).

7. The scraping strip element for a scraper in a floor milling machine according to claim 6. Its features are, The abutment recess (50) is also configured to open toward the long side edge (42).

8. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The scraping strip element (21) is constructed mirror-symmetrically on the rear side (39) about a plane (C) extending along its longitudinal extension direction (L), and asymmetrically in the region of the long side edge (42) and on the front side (40).

9. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The first scraper (44) has at least one ground contact element (38) disposed on the base (37) such that the first scraper (44) provides a scraping function in the working state of the scraper element (21), and the second scraper (45) has at least one ground contact element (38) disposed on the base (37) such that the second scraper (45) provides a sliding function in the working state of the scraper element (21).

10. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The at least one ground contact element (38) of the first scraper (44) is inclined at different angles relative to the at least one ground contact element (38) of the second scraper (45) in a projection plane perpendicular to the longitudinal extension direction (L) of the scraper element (21) and relative to the axis of symmetry extending in the projection plane of at least the rear side (39) of the scraper element (21).

11. The scraping strip element for a scraper in a floor milling machine according to claim 1 or 2. Its features are, The scraping strip element has a T-shaped cross-sectional profile (71) perpendicular to the longitudinal extension direction (L).

12. A floor milling machine with a scraper, the scraper (14) comprising a support plate (20) and at least one replaceable scraping strip element (21) disposed at the lower edge of the support plate. Its features are, The scraping strip element (21) is constructed according to any one of claims 1 to 11, and the support plate (20) has a receiving device in the lower region of the support plate in the vertical direction for topographically locking the at least one scraping strip element (21) at least partially along the forward direction of the ground milling machine (1) and acting upward in the vertical direction.

13. The floor milling machine with scraper according to claim 12, Its features are, The receiving device (25) is configured as a receiving step (26) which is at least partially complementary to the abutment step (65) of the scraping strip element (21).

14. The floor milling machine with scraper according to claim 12 or 13, Its features are, The receiving device (25) includes a rear wall surface (33) having a form-locking structure that extends forward and / or backward relative to the rear wall surface in the direction toward the scraping bar element (21) and / or extends forward and / or backward transversely to the direction toward the scraping bar element (21) and is constructed complementary to the abutment step (65) of the scraping bar element (21), the form-locking structure being covered by a base (37) in the direction toward the front side of the scraping bar element.

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