Wear indicator element and wear indicator arrangement

Abstract

Wear indicator element (17) with a first end (18) on which a wear force acts and a second end (41) opposite it, comprising a frame (24) with an interior (28), wherein a magnet carrier (30) is arranged in the interior (28) which is connected to the first end (18) via a predetermined breaking section (31), and wherein a spring holder (29) is arranged in the interior (28) and a spring element (36) is arranged between the spring holder (29) and the magnet carrier (30), which is in a pre-tensioned state when the predetermined breaking section (31) is intact, wherein the spring holder (29) and the magnet carrier (30) each have a support (37, 38) on which the spring element (36) is arranged, and wherein the frame (24), the magnet carrier (30) and the spring holder (29) are manufactured in one piece from a single material.

Description

[0001] The invention relates to a wear indicator element with the features of claim 1 and a wear indicator arrangement with the features of claim 10.

[0002] Moving components in vehicles or machines are subject to wear and tear from surface abrasion during daily operation. If these components are not replaced in a timely manner, the functionality of the vehicles or machines is impaired, or defects—some of which may be irreparable—can occur. It is therefore advantageous to replace wear parts in a timely manner before excessive wear occurs. At the same time, vehicles and machines should have the longest possible operating times between maintenance appointments. It is therefore desirable to determine the optimal time for replacing wear parts.

[0003] German patent application DE 20 2018 100 481 U1 discloses a wear indicator for sheet metal structures subjected to abrasive stress. A filler element containing an electrical conductor is arranged within the sheet metal structures. The filler element wears down along with the sheet metal structure. As soon as the wear reaches the conductor, an electrical signal is interrupted, indicating that the wear limit has been reached and the component must be replaced.

[0004] A disadvantage of this concept is, in particular, the manufacturing effort involved in integrating the filler material into the sheet metal construction and the effort required when replacing the sheet metal construction due to the electrical connections.

[0005] Furthermore, it should be taken into account that the working environment is very destructive, especially in the area of ​​commercial vehicles, particularly waste collection vehicles, so that a corresponding wear indicator must also be robust against the effects of dirt, waste, corrosive liquids and the like.

[0006] It is therefore the object of the present invention to propose a wear indicator element and a wear indicator arrangement that are robust and easy to manufacture and install.

[0007] This problem is solved by a wear indicator element with the features of claim 1 and a wear indicator arrangement with the features of claim 10. Advantageous further developments of the invention are the subject of the respective dependent claims.

[0008] The invention relates to a wear indicator element with a first end on which a wear force acts and a second end opposite it, comprising a frame with an interior space, wherein a magnet carrier is arranged in the interior space which is connected to the first end via a predetermined breaking section, and wherein a spring holder is arranged in the interior space and a spring element is arranged between the spring holder and the magnet carrier which is in a pre-tensioned state when the predetermined breaking section is intact.

[0009] The frame here is not only to be understood as two-dimensional but also includes a floor, a ceiling, and the connecting side walls. The remaining components of the wear indicator element are arranged within the resulting interior space. The ceiling and floor do not necessarily have to cover the entire interior space.

[0010] The magnet carrier has a magnet receptacle into which a magnet can be inserted, in particular by means of a form-fit, force-fit or friction-fit connection.

[0011] The magnetic carrier is only connected to the rest of the indicator element in one piece and with the same material at the predetermined breaking point, so that it is freely movable in the event of a break at the predetermined breaking point.

[0012] The wear indicator element is positioned in its installed state so that the abrasive force acts on the first end. This end is gradually worn down until the predetermined breaking point is reached. At this point, the predetermined breaking point breaks, and the magnet carrier becomes freely movable relative to the other components of the wear indicator element.

[0013] The spring force of the spring element, for example a coil spring or a rubber element, which relaxes when the predetermined breaking point is reached, then moves the magnet carrier from its original position, which can be registered by a sensor explained below in the context of the wear indicator arrangement.

[0014] The spring element is advantageously not connected to the spring holder or the magnet carrier, but merely clamped between them in a pre-tensioned state, which simplifies manufacturing.

[0015] This wear indicator element is simple in its functionality and can be positioned on or in any wear component, saving space. The underlying mechanism is simple, reliable, and robust.

[0016] In an advantageous embodiment of the invention, the width of the frame between the first end and the predetermined breaking point corresponds to the wear depth. The wear depth refers to the thickness of the layer on the surface of the wear component up to which surface abrasion is permissible before the wear component must be replaced. As soon as a layer on the surface of the wear component has been worn away to a thickness corresponding to the wear depth, this is communicated to the operator.

[0017] The wear depth depends on the wear component and its location. A wear indicator element according to the invention can be easily adapted to these boundary conditions by manufacturing it with a frame of the appropriate width. The width of the frame then corresponds to the intended wear depth of the component. Preferably, this relates to a side wall of the frame.

[0018] In an advantageous embodiment of the invention, the spring holder has two guide elements between which the spring element is arranged and which extend in one direction from the first end to the second end. This holds the spring element in its intended position when compressed and prevents it from shifting during the release process, allowing the spring force to act in the intended direction towards the second end.

[0019] Preferably, guiding elements extend between the predetermined breaking point and the magnet receptacle.

[0020] In a further embodiment of the invention, the magnetic carrier has at least one arm which is connected at a first end to the predetermined breaking point and at a second end to a magnetic receptacle of the magnetic carrier. This allows the design of the wear indicator element to be adapted to the respective installation conditions.

[0021] It is particularly preferred that the arm(s) encompass the spring holder. If, in particular, two arms are provided, they surround the spring holder in a ring-like manner. This allows the individual components of the wear indicator element to be arranged in a space-saving manner and optimally for their respective functionality.

[0022] Another preferred embodiment of the invention provides that the spring holder and the magnet holder each have an abutment on which the spring element is arranged. The pre-tensioned spring element is supported against the abutments and is thereby held in its intended position in the direction between the first and second ends.

[0023] The abutments can be designed in such a way as to facilitate the clamping of the spring element between them. For example, projections or grooves can be formed with which the spring element interacts.

[0024] The spring retainer's abutment is preferably arranged between the guide elements. This allows the abutment, together with the guide elements, to form a guide for the spring element in the plane of the side walls. Perpendicular to this, the base and the cover act as a boundary for the spring element.

[0025] The abutment arranged between the guide elements can also form a stop for the arms if the magnet carrier moves freely after the predetermined breaking point has broken, thus limiting the free movement of the magnet carrier.

[0026] The abutment of the magnet carrier is preferably arranged on or formed on the magnet holder.

[0027] A further embodiment of the invention provides that the frame, the magnet carrier, and the spring holder are manufactured in one piece from a single material. The frame comprises, in particular, a base, a top, and side walls. Specifically, the magnet carrier is connected to a side wall via the predetermined breaking point. The spring holder is connected to the base.

[0028] The preferred method of production is an additive manufacturing process.

[0029] The wear indicator element is preferably made of a plastic material.

[0030] In a method for manufacturing a wear indicator element according to the invention, the element is produced in one piece using an additive manufacturing process, using a single material composition. A replacement element is provided at the position where the spring element will later be located. This replacement element extends from the spring holder, particularly from its abutment, to the magnet carrier, particularly the magnet receptacle. After the wear indicator element is completed, this replacement element is removed from it, for example, by breaking it out. The pre-tensioned spring element is then inserted between the spring holder and the magnet carrier.

[0031] This advantageously results in a stable and robust wear indicator element.

[0032] Another preferred embodiment of the invention provides that the interior has a receiving space into which the magnetic carrier can be moved when the predetermined breaking point is destroyed. The receiving space is, in particular, surrounded by or formed by the side walls. This results in a defined movement of the magnetic carrier, which comes to rest at a designated position after the predetermined breaking point has ruptured.

[0033] The magnet carrier is particularly preferably movable by the spring force of the spring element.

[0034] It is further preferred that the receiving space has guiding elements which interact with complementary shapes of a free end of the magnet carrier, so that it can be moved to the intended position in the receiving space.

[0035] This further improves the guidance of the magnet carrier and prevents slippage or jamming, ensuring that a sensor receives a clear measurement signal as described below. The guide elements are formed on the side walls. They do not need to extend over the entire circumference of the free end of the magnet carrier. The guide elements can be projections in the side walls. It is also possible that no side wall is formed at the second end of the wear indicator element and that the guide elements are formed at the free ends of the side walls.

[0036] The free end of the magnet carrier can, for example, be tapered to a point, which further supports the guidance of the movement of the magnet carrier.

[0037] The invention further relates to a wear indicator arrangement with a wear component having a pocket in which a wear indicator element as described above is arranged, such that its first end is arranged in or on the wear surface of the wear component, and a magnetic field sensor arranged near the wear indicator element.

[0038] The wear component can be any component subject to wear. The wear surface is the part of the wear component or the part of its surface that is exposed to wear forces. The pocket can be incorporated into the component during its manufacturing process. It can also be added later as part of a retrofit.

[0039] The pocket can be formed on a side surface of the wear component or within its solid material. It can also be provided that the pocket is formed by a penetration in the wear component if the latter has a sufficiently small thickness.

[0040] Both the wear indicator element and the pocket can have complementary grooves, beads and other depressions or protrusions to guide the wear indicator element in the pocket.

[0041] The wear component can have multiple pockets, particularly pockets oriented in different directions, to accommodate inhomogeneous or direction-dependent wear. Different wear depths can also be taken into account.

[0042] Furthermore, it can be provided that the pocket covers at least part of the interior of the wear indicator element. In this case, the formation of a base and / or lid in this area can be omitted, which speeds up the production of the wear indicator element.

[0043] The magnetic field sensor is positioned close to the wear indicator element, so that its detection range covers either the magnet receptacle of the wear indicator element in its original position or the receptacle of the wear indicator element itself. In the first case, the sensor emits a continuous signal as long as the wear depth has not been reached. Once the wear reaches the specified depth, the predetermined breaking point snaps, and the magnet, along with the magnet carrier, is removed from the sensor's detection range, at which point the sensor ceases to emit a signal. The vehicle or machine control system recognizes that the specified wear depth has been reached and sends a message to the operator indicating that the wear component needs to be replaced. Further actions, such as stopping the vehicle or machine, can also be triggered by this signal.

[0044] If the sensor detects the intake area, the operating mechanism is reversed. In this case, the sensor does not output a signal under normal conditions. Only when the intended wear depth is reached is a signal generated, which in turn triggers a control unit.

[0045] Preferably, the magnet carrier is located within the detection range of the magnetic field sensor. This offers the additional advantage that other faults in the wear indicator assembly can also be detected, such as defective cables or connectors, or an unforeseen break in the magnet carrier or the spring element. In such cases, the control system no longer receives a signal, which fundamentally indicates a fault.

[0046] Preferably, the first end of the wear indicator element is arranged essentially flush with the wear surface. This ensures that the wear surface and the wear indicator element wear down uniformly and that the wear component can be replaced at the intended wear depth.

[0047] In an advantageous further development, it is provided that the wear component has a core made of a metallic material which is at least partially surrounded by a wear material.

[0048] The wear material can be applied only where wear occurs or where specific properties, such as sliding properties, are required. This allows material to be used according to requirements. Maintenance is also simplified because only a portion of the wear component needs to be replaced, rather than the entire component. Material usage is also reduced.

[0049] The bag is designed specifically with wear-resistant material in mind.

[0050] According to a further embodiment of the invention, the magnetic field sensor is arranged in another component that interacts with the wear component. Interaction is understood to mean that the component and the wear component are in a fixed spatial relationship to each other or are movably or immovably connected to each other.

[0051] Advantageously, this component is not a replaceable part, meaning it remains permanently installed in the machine or vehicle. This offers the advantage of protecting the sensor from environmental influences such as dirt, debris, or corrosive liquids. Furthermore, the sensor itself can remain permanently in place, while only the wear indicator element is replaced along with the wear part.

[0052] The magnetic field sensor is preferably installed in a bore in the component. From there, a further through-hole can lead through the component, in which the cables of the magnetic field sensor are routed.

[0053] The magnetic field sensor can be surrounded by a rubber sleeve to hold the sensor in the bore and / or to seal the opening of the bore facing the wear indicator element. The sleeve provides additional protection for the sensor.

[0054] In a preferred embodiment of the invention, the wear component is a sliding block, and the other component is a shaft connected to the sliding block. A sliding block is guided in a rail or similar structure to direct the movement of an associated machine or vehicle component. The sliding motion in the rail causes the surface of the sliding block to wear down. The shaft, which is part of a machine or vehicle component, is made of a robust metallic material such as steel and is typically arranged in a recess in the sliding block. The bore for the magnetic field sensor is located in the end face of the shaft facing the sliding block. This provides optimal protection for the magnetic field sensor inside, which is completely shielded from environmental influences. Simultaneously, the sensor is located close to the wear indicator element.

[0055] Further features of the invention will become apparent from the figures described below.

[0056] This shows: Fig. 1 the rear part of a waste collection vehicle with a wear indicator arrangement according to the invention, Fig. 2 a section of the rear part of Fig. 1, Fig. 3 a section of the rear part of Fig. 1 in a sectional view, Fig. 4 a wear indicator arrangement, Fig. 5 a wear indicator arrangement in a sectional view, Fig. 6 a wear indicator element in a perspective view, Fig. 7 a wear indicator element in a sectional view, Fig. 8 a wear indicator element in another sectional view.

[0057] The embodiment of the invention shown in the figures is installed in a rear section 1 of a waste collection vehicle which is otherwise not shown in detail ( Fig. 1 to 5). The rear section 1 is attached to the collection compartment of the waste collection vehicle. The waste is loaded through the feed opening 2 into the loading hopper 3 of the rear section 1. By means of a compaction mechanism 4, the waste is compressed and conveyed into the collection compartment.

[0058] The compaction mechanism 4 comprises a support plate 5 and a pressure plate 6. The scoop-shaped pressure plate 6 is pivotally attached to the support plate 5 by a shaft 7. The support plate 5 itself is linearly movable along a guide rail 8. To compact and convey the waste, the support plate 5 is moved downwards towards the loading trough 3. The pressure plate 6 is folded upwards during this movement. The pressure plate 6 then folds downwards, engages in the loading trough 3, and encloses the waste. The support plate 5 is then guided upwards again along the guide rails 8, thereby conveying the waste from the pressure plate 6 into the collection chamber, where it is pressed and compressed against the discharge plate located there, or against the waste already present in the chamber.

[0059] The folding movement is enabled by a hinged connection between the support plate 5 and the pressure plate 6. The two components are connected to each other on the right and left via a shaft 7. The pressure plate also has a support element 14, which is penetrated by the shaft 7 and to which the hydraulic drive is attached.

[0060] This compaction cycle is repeated continuously, either after a predetermined number of emptying operations into the loading hopper 3 or as soon as the fill level of the loading hopper 3 reaches a certain height. This means hundreds of compaction cycles per collection run and thus a constant movement of the support plate 5 and the press plate 6.

[0061] The carrier plate 5 is guided in the guide rails 8 by means of sliding blocks 9, 10, which are designed as wear components. These consist essentially of a metallic core 11, which is at least partially surrounded by wear material 12, 13 made of plastic with a low coefficient of friction, so that the sliding blocks 9, 10 can move in the guide rails 8 without jamming. The sliding blocks 9, 10 are attached to a carrier 15.

[0062] Over time, the wear material 12, 13 will wear down. If this wear is too great, the sliding blocks 9, 10 will have too much play in the guide rails 8, and the smooth movement of the carrier plate 5 will no longer be guaranteed. In the worst case, the carrier plate 5 will become jammed and bent and must be completely replaced.

[0063] Therefore, it is necessary to regularly replace the sliding blocks 9, 10 or to provide them with new wear material 12, 13 to ensure the smooth operation of the compaction mechanism 4. To perform maintenance at the optimal time, the compaction mechanism 4 is equipped with a wear indicator arrangement.

[0064] In the wear material 13 facing the vehicle outer wall of the in Fig. In the sliding block 9 shown in more detail below, a pocket 16 is formed in which a wear indicator element 17, as described in detail below, is arranged. Its first end 18 is arranged flush with the wear surface 19 of the wear material 12, which rubs against the sliding rail 8.

[0065] In this embodiment, wear is determined only on one side of the sliding block 9. The greatest abrasion occurs on this side and the opposite wear surface 20 of the sliding block 9, assuming that the degree of wear is approximately the same on both sides. Wear is much less pronounced on the other sides, so that wear surfaces 19 and 20 represent the critical areas of the sliding block 9. If wear becomes excessive in these areas, maintenance must be performed.

[0066] The shaft 7 engages in a recess 21 of the sliding block 9. A magnetic field sensor 23 is arranged in a through-bore 22 parallel to the longitudinal axis of the shaft 7 at the end of the shaft facing the sliding block 9, and its cable 24 is guided in the through-bore 22. The magnetic field sensor 23 is thus located in close proximity to the wear indicator element 17.

[0067] The wear indicator element 17 is located in the Fig.Figures 6 to 8 are shown in detail. The wear indicator element 17 has a first end 18 on which the wear force acts. In its initial state, the first end 18 is flush with the wear surface 19 of the sliding block 9. Since the plastic material from which the wear indicator element 17 is made exhibits a similar abrasion behavior to the wear material 12, the first end 18 is worn down uniformly along with the surface of the sliding block 9.

[0068] The first end 18 is part of the frame 24 of the wear indicator element 17, which consists of the base 25, the cover 26, and the side walls 27. The frame forms an interior space 28 in which a spring retainer 29 is arranged. Also located in the interior space 28 is a magnet carrier 30 with a magnet receptacle 32 in the form of a recess containing a magnet 33, which is connected to the frame 24 only via a predetermined breaking section 31 in the region of the first end 18. The magnet carrier has two arms 34, 35 that encompass the spring retainer 29 and are connected to the predetermined breaking section 31. The spring retainer 29 is therefore located between the predetermined breaking section 31 and the magnet receptacle 32.

[0069] When the wear of the wear indicator element 17 reaches the predetermined breaking point 31, the connection between frame 24 and magnet carrier 30 is released and the magnet carrier 30 can move in the interior 28.

[0070] Between the spring holder 29 and the magnet receptacle 32 of the magnet carrier 30 is a spring element 36, here designed as a coil spring, which is pre-tensioned in its initial state. The spring element 36 is supported at its first end (viewed in the direction of the spring force) against a support 37 of the spring holder 29 and at its second end against a support 38 of the magnet carrier 30. The support 37 of the spring holder 29 is designed as a simple stop in this example. The support 38 of the magnet carrier 30 is designed as a projection or pin onto which the coil spring is placed.

[0071] When the predetermined breaking section 31 breaks, the spring element 36 can relax and pushes the freely movable magnet carrier 30 away from the spring holder 29, thus giving the magnet carrier 30 a direction of movement.

[0072] To ensure that the spring element 36 remains in its original position and is guided during its relaxation, guide elements 30, 40 are provided on the spring holder 29. The spring element 36 is arranged between these guide elements, which extend in one direction from the first end 18 to the second end 41 of the wear indicator element 17. The guide elements 30, 40, together with the base 25 and cover 26, form an elongated space in which the spring element 36 can relax in a preferred direction.

[0073] The wear indicator element 17 is inserted into the pocket 16. It has two projections 42, 43 that engage in corresponding grooves in the pocket 16, allowing the wear indicator element 17 to be easily inserted and positioned correctly. In the wear indicator element 17 shown here, the cover 26 is only present in the section of the wear indicator element 17 that extends beyond the pocket 16. This is unnecessary because the inner wall of the pocket 16 covers the interior 28 of the wear indicator element 17. This saves material and shortens the production process.

[0074] In the present embodiment, the wear indicator element 17 and the magnetic field sensor 23 are arranged such that the magnet 33 is always located near the magnetic field sensor 23 in its initial state. Because the magnet 33 is always within the measuring range of the magnetic field sensor 23, the sensor sends a constant signal to a control unit (not shown). When the intended wear depth T is reached, causing the predetermined breaking point 31 to break, the spring element 36 drives the magnet 33 out of the sensor area, and the magnetic field sensor 23 no longer sends a signal. The control unit then informs the operator of the refuse collection vehicle that the relevant sliding block or its wear material must be replaced. Other faults, such as a broken cable or a loose connector, can also be identified in this way.

[0075] The thickness of the frame 24 in the area of ​​the predetermined breaking point 31 determines the wear depth T at which the wear indicator element 17 is triggered. This allows the wear indicator element 17 to be adapted to different wear components. Alternatively, the point in time at which the wear indicator element 17 is triggered, and thus the maintenance interval, can be predetermined.

[0076] The magnetic carrier 30 is driven by spring force into the receiving chamber 44 of the wear indicator element 17, which is part of the interior 28. In the region of the second end 41 of the wear indicator element 17, guide elements 45, 46 are arranged on the side walls 27 in the form of projections extending into the receiving chamber 44, which interact with the tapered free end 47 of the magnetic carrier 30. This guides the magnetic carrier 30 in its spring-driven movement and moves it out of the measuring range of the magnetic field sensor 23, preventing slippage or jamming. This ensures that a clear measurement signal is generated.

[0077] The wear indicator element 17 is manufactured in one piece using an additive manufacturing process, consisting of a single piece of material. A replacement element is provided at the position where the spring element 36 will later be located. This replacement element extends from the abutment 37 of the spring holder 29 of the magnet receptacle 32. After the wear indicator element 17 is completed, this replacement element is removed from it, for example, by breaking it out. The pre-tensioned spring element 36 is then inserted in its place. Reference sign 1 Rear section 2 Pouring openings 3 Loading tray 4 Compaction mechanism 5 Carrier plate 6 Press plate 7th wave 8 sliding rail 9 sliding block 10 sliding block 11 core 12 Consumables 13 Consumables 14 Support element 15 carriers 16 bags 17 Wear indicator element 18 first end of 17 19 wear area of ​​12 20 wear area of ​​12 21 Exclusion of 9 22 Through hole 23 Magnetic field sensor 24 frames 25 floor of 24 26 lids out of 24 27 side wall of 24 28 Interior 29 spring holders 30 magnetic carriers 31 Breakaway section 32 Magnet recording 33 Magnet 34 arms out of 30 35 arms out of 30 36 spring element 37 abutments of 29 38 abutments of 30 39 Guide element 40 guide element 41 second end of 17 42 lead 43 lead 44 Recording Room 45 Guide element 46 Guide element 47 free end of 30 48 cables T Wear depth QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2018 100 481 U1

[0003]

Claims

[1] Wear indicator element (17) with a first end (18) on which a wear force acts and a second end (41) opposite it, comprising a frame (24) with an interior (28), wherein a magnet carrier (30) is arranged in the interior (28) which is connected to the first end (18) via a predetermined breaking section (31), and wherein a spring holder (29) is arranged in the interior (28) and a spring element (36) is arranged between the spring holder (29) and the magnet carrier (30), which is in a pre-tensioned state when the predetermined breaking section (31) is intact. [2] Wear indicator element (17) according to claim 1 characterized by , that the width of the frame (24) between the first end (18) and the predetermined breaking section (31) corresponds to the wear depth T. [3] Wear indicator element (17) according to claim 1 or 2 characterized by, that the spring holder (29) has two guide elements (39) between which the spring element (36) is arranged and which extend in one direction from the first end (18) to the second end (41). [4] Wear indicator element (17) according to at least one of the preceding claims characterized by , that the magnet carrier (30) has at least one arm (34,35) which is connected at a first end (18) to the predetermined breaking section (31) and at a second end (41) to a magnet receptacle (32) of the magnet carrier (30). [5] Wear indicator element (17) according to claim 4 characterized by , that the arm(s) (34,35) encompass the pen holder (29). [6] Wear indicator element (17) according to at least one of the preceding claims characterized by , that the spring holder (29) and the magnet carrier (39) each have a support (37,38) on which the spring element (36) is arranged. [7] Wear indicator element (17) according to at least one of the preceding claims characterized by , that the frame (24), the magnet carrier (30) and the spring holder (29) are made of the same material and are manufactured in one piece. [8] Wear indicator element (17) according to at least one of the preceding claims characterized by , that the interior (28) has a receiving space (44) into which the magnet carrier (30) can be moved when the predetermined breaking section (31) is destroyed. [9] Wear indicator element (17) according to claim 8 characterized by , that the receiving space (44) has guide elements (45,46) which interact with complementary shapes of the free end (47) of the magnet carrier (30) so that it can be moved to the intended position in the receiving space (44). [10] Wear indicator arrangement with a wear component having a pocket (16) in which a wear indicator element (17) according to at least one of the preceding claims is arranged, such that its first end (18) is arranged in or on the wear surface (19, 20) of the wear component, and a magnetic field sensor (23) arranged near the wear indicator element (17). [11] Wear indicator arrangement according to claim 10 characterized by , that the first end (18) of the wear indicator element (17) is arranged substantially in line with the wear surface (19,20). [12] Wear indicator arrangement according to claim 10 or 11 characterized by , that the magnetic field sensor (23) is arranged such that the magnet carrier (30) is located in the detection range of the magnetic field sensor (23). [13] Wear indicator arrangement according to at least one of claims 10 to 12 characterized by, that the wear component has a core (11) made of a metallic material which is at least partially surrounded by a wear material (12,13). [14] Wear indicator arrangement according to at least one of claims 10 to 13 characterized by , that the magnetic field sensor (23) is arranged in another component that interacts with the wear component. [15] Wear indicator arrangement according to claim 14 characterized by , that the wear component is a sliding block (9,10) and the other component is a shaft (7) connected to the sliding block (9,10).

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