Filter component for filtering cooling air for a hand-held work device and method for manufacturing such a filter component, as well as hand-held work device

Abstract

The invention relates to a filter component for filtering cooling air for a hand-held power tool (2). The filter component (1) is designed to form part of an outer surface (3) of the power tool (2) and to be attached to a base body (11) of the power tool (2). The filter component (1) comprises a guide element (110) for aligning the power tool (2), in particular for aligning a tool (10) of the power tool (2). The filter component (1) has a sealing element (77) for bearing against the base body (11) of the hand-held power tool (2) and for sealing between the filter component (1) and the base body (11). The guide element (110) and the sealing element (77) are made of the same material.

Description

[0001] The invention relates to a filter component for filtering cooling air for a hand-held work device according to the preamble of claim 1, a hand-held work device (claim 9) and a method for manufacturing a filter component for filtering cooling air for a hand-held work device according to the preamble of claim 12.

[0002] From DE 10 2010 008102 A1, a hand-held tool is known which has a marking on its outside as a sighting aid. It is known to provide such a marking on a filter component.

[0003] From DE 20 2019 104 914 U1 a motor chainsaw with a filter element arranged on an outside is known.

[0004] From DE 10 2015 007 968 ​​A1 a filter element for the intake air of an internal combustion engine is known, which has a sealing device made of a foamed thermoplastic elastomer, which was injection molded in a plastic injection molding process.

[0005] The present invention is based on the objective of further developing a generic filter component for filtering cooling air for a hand-held work device in such a way that it is easy to manufacture while providing good filter performance.

[0006] This problem is solved by a filter component having the features of claim 1.

[0007] Another object of the invention is to provide a method for manufacturing a generic filter component that enables the simple manufacture of a filter component with good filtering effect.

[0008] This problem is solved by a method having the features of claim 12.

[0009] The filter component according to the invention for filtering cooling air for a hand-held tool is designed to form part of the outer surface of the tool and to be attached to a base body of the tool. The filter component includes a guide element for aligning the tool, in particular for aligning a tool of the tool. The filter component has a sealing element for contact with the base body of the hand-held tool and for sealing between the filter component and the base body. This prevents unfiltered cooling air from entering the base body of the hand-held tool. Any potential gap between the base body of the tool and the filter component is sealed by the sealing element. Otherwise, unfiltered cooling air could be drawn in through this potential gap, which is eliminated by the invention.The sealing element ensures excellent filtration performance of the filter component. According to the invention, the leveling element and the sealing element are made of the same material. In particular, the leveling element and the sealing element are made of the same material. This allows for simple manufacturing of both the leveling element and the sealing element. Specifically, the leveling element and the sealing element can be manufactured together. Only a single material needs to be used to manufacture both the leveling element and the sealing element. This saves production costs and simplifies warehousing.

[0010] In particular, the sighting element and the sealing element are formed together as a single, monolithic component. Specifically, the sighting element and the sealing element are designed as a single, interconnected unit. This allows for the simple manufacture of both the sighting element and the sealing element. Due to their shared monolithic design, the sighting element and the sealing element can be manufactured together in a single process step, in particular by casting or injection molding. The combined manufacture of the sighting element and the sealing element as a monolithic unit saves both time and money.

[0011] In particular, both the locating element and the sealing element are made of an elastomer, especially a thermoplastic elastomer. This allows for simple manufacturing of both the locating element and the sealing element. Both the locating element and the sealing element can be manufactured in a single casting process step, especially an injection molding process step.

[0012] In particular, the filter component has an inner surface facing the base body of the hand-held tool when installed. In particular, the filter component has an outer surface facing away from the base body of the hand-held tool when installed. In particular, the filter component has at least one flow opening, in particular at least two, in particular exactly two, in particular exactly four flow openings. In particular, the at least one flow opening completely penetrates the filter component from the inner surface to the outer surface. This applies in particular to all flow openings. In particular, the gauge and sealing element extends through the at least one flow opening. This allows the gauge and sealing element to be manufactured easily in a single casting process step.Simultaneously, the gauging and sealing element seals the at least one flow opening during its manufacture. This prevents unfiltered cooling air from flowing through the filter component via this opening. This increases the filtering efficiency of the filter component.

[0013] In particular, the filter component has a frame. Specifically, the frame has a channel on the inside of the filter component for receiving the sealing element. Specifically, the frame has a channel on the outside of the filter component for receiving the leveling element. During the manufacture of the sealing element, the material for its production can be poured, especially by injection molding, into the channel for receiving the sealing element and spread within the channel. In particular, the sealing element then protrudes from the channel. Specifically, an edge of the channel for receiving the sealing element has a lower height than the height of the sealing element. During the manufacture of the leveling element, material for its production can be poured, especially by injection molding, into the leveling element channel and spread within the leveling element channel. This allows for the simple manufacture of both the sealing element and the leveling element.

[0014] In particular, the at least one flow opening connects the channel for receiving the sealing element and the channel for receiving the leveling element. Specifically, the channel for receiving the sealing element is formed on the inside of the filter component. Specifically, the channel for receiving the leveling element is formed on the outside of the filter component. Due to the at least one flow opening, it is easily possible to manufacture both the leveling element and the sealing element in a single casting process step. In this way, the material for manufacturing the leveling and sealing elements can be introduced onto only one side of the filter component.From this side, the material for manufacturing the gauge and sealing element then flows either in the channel for receiving the sealing element or in the gauge element channel for receiving the gauge element to the at least one flow opening and thus penetrates to the other side of the filter component, in order to then penetrate into the respective other channel. In particular, the sprue is located on the outside of the filter component. Specifically, the material for manufacturing the gauge and sealing element is first introduced via the sprue into the gauge element channel for receiving the gauge element and flows from there to the at least one flow opening. Specifically, the material for manufacturing the gauge and sealing element then flows through the at least one flow opening onto the inside of the filter component into the channel for receiving the sealing element. Specifically, the base body, especially the frame, and the gauge element contrast in color with each other.This makes the sighting element easily visible. In particular, the sighting element contrasts with the base body, especially the frame, in terms of color.

[0015] In particular, the locating element is located on the outside of the filter component. This makes the locating element quick and easy to identify.

[0016] In particular, the filter component for filtering cooling air is part of a hand-held work device.

[0017] The hand-held tool with the filter component as described above, and with a sighting element on the outside of the filter component, includes in particular a tool. The tool has a longitudinal extension. In particular, the sighting element has a probing bar or a felling bar. It may also be provided that the sighting element has both a probing bar and a felling bar. In its installed position, the probing bar extends, in particular, substantially in the direction of the longitudinal extension. In its installed position, the felling bar extends, in particular, substantially in a transverse direction, especially in a direction perpendicular to the direction of the longitudinal extension. The probing bar provides the user with information about the longitudinal extension of the tool, even if the tool is not visible. This is helpful, for example, if the tool is obscured by a workpiece.This can happen, for example, with a handheld chainsaw if the guide bar and saw chain get stuck in a saw cut. When felling a tree, the felling guide can indicate the direction in which the tree will fall.

[0018] In particular, a longitudinal direction of the cutting bar runs transversely, especially perpendicularly, to a longitudinal direction of the felling bar.

[0019] In particular, the grommet has a first grommet section and a second grommet section. Specifically, the first grommet section and the second grommet section are positioned differently from each other when viewed in the direction of flow.

[0020] In particular, the drip edge has a first drip edge section and a second drip edge section. Specifically, the first drip edge section and the second drip edge section are positioned differently from each other in the view in the direction of flow.

[0021] In particular, the filter component of the hand-held tool is designed such that the monolithic, and especially the materially uniform and continuous, design of the probing bar and the felling bar of the sighting element is not visible on the outside of the filter component. Specifically, the probing bar and the felling bar are arranged in such a way that their materially uniform, and especially monolithic, design is not visible on the outside of the filter component. Specifically, the probing bar and the felling bar are arranged such that they appear separated from each other by obscurations, especially by the frame. This allows for a clear separation between the felling bar and the probing bar, thus facilitating orientation using the probing bar and the felling bar.

[0022] In the inventive method for manufacturing a filter component for filtering cooling air for a hand-held tool, the filter component is designed to form part of the outer surface of the tool and to be attached to a base body of the tool. The filter component comprises a guide element for aligning the tool, in particular for aligning a tool of the tool. The filter component has a sealing element for bearing against the base body of the hand-held tool and for sealing between the filter component and the base body. The guide element and the sealing element are cast in a single casting process step. This forms a guide and sealing element. This is associated with the advantages described above in connection with the filter component. The guide and sealing element is, in particular, monolithic.The method according to the invention can be further developed by adding the features described above in connection with the filter component. In particular, the gauging element and the sealing element are formed together as a single, integrated gauging and sealing element, made of the same material.

[0023] Exemplary embodiments of the invention are explained below with reference to the drawing. The drawing shows: Fig. 1. A schematic representation of a side view of a hand-held work device with a filter component for filtering cooling air. Fig. 2 a true-to-original representation of the in Fig. 1 schematically represented filter component in side view, Fig. 3 a true-to-scale representation of the filter component made of Fig. 2 in side view of the inside of the filter component, Fig. 4a a sectional view of a section through the true-to-life working device and the true-to-life filter component with support fabric arranged on the outside and filter fabric arranged on the inside along the schematic representation according to Fig. 1 drawn section plane IV-IV, Fig. 4b a sectional view analogous to Fig. 4a of an alternative embodiment of a filter component with filter fabric arranged on the outside and support fabric arranged on the inside, Fig. 5 a sectional view analogous to Fig. 4a and Fig. 4b in enlarged detail view at the in Fig. 4a and Fig. 4b, marked with V, of a further alternative embodiment of a filter component with support fabric arranged on the outside, further support fabric arranged on the inside and filter fabric arranged in between, Fig. 6a a schematic representation of a section of a first variant of the support fabric of the filter component from the Fig. 1 to 5, Fig. 6b a schematic representation of a section of a first variant of the filter fabric of the filter component from the Fig. 1 to 5, Fig. 7a a schematic representation of a section of a second variant of the support fabric of the filter component from the Fig. 1 to 5, Fig. 7b a schematic representation of a section of a second variant of the filter fabric of the filter component from the Fig. 1 to 5, Fig. 8 A schematic perspective view of a section of a support filter fabric, which is installed in the filter component according to the Fig. 1 to 5 may be provided instead of the tissue provided there, Fig. 9 a schematic representation along the in Fig. 8 drawn section plane IX, Fig. 10 the representation of the filter component from Fig. 3 in an alternative design of the filter component with sealing element and stop element, Fig. 11 a perspective view of the first half of a casting tool with pins on which the fabric of the filter component is mounted, Fig. 12 a sectional view of a section through the first tool half made of Fig. 11 with tissue attached to the pen, Fig. 13 a section analogous to the section representation from Fig. 12 both through the first tool half and through the second tool half of the casting tool in a state in which the two tool halves are separated from each other, but the fabric is pressed by a retaining element projecting from the second tool half onto a bearing surface of a support element projecting from the first tool half, Fig. 14 a sectional view of a section parallel to the section plane of the section from Fig. 13 in the same state of the casting tool, Fig. 15 a sectional view of the casting tool analogous to the sectional view from Fig. 13, wherein the first tool half and the second tool half are brought as close together as possible and the fabric placed on the pin is located between the first tool half and the second tool half, Fig. 16 a view of the filter component analogous to the view from Fig. 2, wherein in Fig. 16 shows an alternative embodiment of the filter component in which the filter component has a locating element, Fig. 17 a sectional view of a section along the in Fig. 16 inscribed section plane XVII-XVII, Fig. 18 a sectional view of a section along the in Fig. 16 inscribed section plane XVIII-XVIII, Fig. 19 a perspective exploded view of the filter component made of Fig. 16, which shows the shape of the locating and sealing element, Fig. 20 a perspective partial exploded view of a part of the basic body of the hand-held work tool and the filter component made of Fig. 16, Fig. 21 a cut through the in Fig. 20 illustrated filter components and the base body in the assembled state, Fig. 22 a detailed representation of a in Fig. 21 details marked XXII Fig. 23 a schematic representation of a section along the section plane XXIII-XXIII from Fig. 22, Fig. 24 a schematic representation of an alternative casting tool for the production of an alternative embodiment of a filter component, wherein the fabric of the filter component is threaded onto a pin of the casting tool between the two tool halves and the pin rests against both the first tool half and the second tool half and Fig. 25 a schematic representation analogous to Fig. 24, whereby the pin is no longer in contact with the second half of the tool, but is pushed back by material for the manufacture of the frame.

[0024] Fig. Figure 1 shows a hand-held work device 2. In the exemplary embodiments, the hand-held work device 2 is a hand-held motor chainsaw.

[0025] The handheld tool 2 can also be a brush cutter, a pruner, a reciprocating saw, a vacuum and / or blower, hedge trimmer, an angle grinder, a pole pruner, a lawnmower, or a similar tool. The tool 2 is portable when used as intended. The tool 2 is handheld when used as intended. In particular, the handheld tool 2 is a chainsaw. In the exemplary embodiments, the handheld tool 2 is a so-called rear-handle chainsaw. However, the handheld tool 2 can also be a chainsaw designated as a tree care saw.

[0026] The working device 2 has a tool 10. In the exemplary embodiment, the tool 10 is a guide rail 21 with a saw chain 31. The saw chain 31 is guided on the guide rail 21. As in Fig. Figure 1, schematically represented by a dashed line, shows that the hand-held tool 2 has a motor 24 for driving the tool 10, in particular the saw chain 31. In the exemplary embodiments, the motor 24 is an electric motor. The tool 10 can also be a saw blade, a cutting disc, a trimmer line, or similar. In the exemplary embodiments, the saw chain 31 runs around the guide bar 21 during operation. The motor 24 drives the saw chain 31 in the exemplary embodiment. The motor 24 is arranged in a base body 11. The base body 11 has an outer casing.

[0027] In all embodiments, the work device 2 comprises a control handle 23. A control element 22 is arranged on the control handle 23. The operator can use the control element 22 to set the power of the motor 24 or the speed of the motor 24 or of the tool 10, in particular the saw chain 31. The control handle 23 is part of the base body 11 of the hand-held work device 2. The control handle is located at the rear end of the base body 11. At the front end of the base body 11, the tool 10, in these embodiments the guide rail 21, projects from the base body 11. In addition to the control handle 23, the work device 2 comprises a loop handle 25. The loop handle 25 is used for carrying and guiding the work device 2. The loop handle 25 is formed by a handle tube. The user can grip the handle tube completely. The bow handle 25 is positioned between the operating handle 23 and the tool 10.In particular, the handle 25 is arranged in side view between the operating handle 23 and the tool 10.

[0028] The tool 10 is positioned away from the user during operation of the work device 2. The operating handle 23 is positioned towards the user during operation of the work device 2.

[0029] The hand-held tool 2 includes a filter component 1. The filter component 1 serves to filter cooling air. The filter component 1 is designed to form part of an outer surface 3 of the hand-held tool 2. The filter component 1 is designed to be attached to the base body 11 of the tool 2. Fig. 1 The filter component 1 forms part of the outer surface 3 of the working device 2 and is attached to the base body 11 of the working device 2. In the exemplary embodiment according to Fig. In the example shown, the filter component 1 is attached to the base body 11 by means of a fastening element 12. Cooling air from the outside can enter the working device 2 through the filter component 1. In the exemplary embodiment, the cooling air serves to cool the motor 24. The cooling air is cleaned of particles and impurities by means of the filter component 1.

[0030] In the exemplary embodiments, the working device 1 includes a blower (not shown). The blower serves to draw in cooling air. The blower is arranged in the base body 11. The motor 24 drives the blower. The blower draws cooling air through the filter component 1 into the interior of the base body 11.

[0031] The filter component 1 is arranged on one side of the base body 11. In this embodiment, the tool 10 extends in a tool plane. The saw chain 31 rotates in the tool plane. The tool plane divides the base body 11 into a first and a second half. The filter component 1 is completely located in one of the two halves. In a side view perpendicular to the tool plane, the filter component 1 is visible and only partially obscured by the handle 25. The handle 25 overlaps the base body 11.

[0032] As especially in the Fig. 2 and Fig. As shown in Figure 3, the filter component 2 has a fabric 70. The filter component 1, in particular the fabric 70, comprises thick thread elements 4 and thin thread elements 5, which are arranged in the Fig. Figures 6 to 9 are shown. For filtering the cooling air, the cooling air must pass through both the thin thread elements 5 and the thick thread elements 4. The thick thread elements 4 and the thin thread elements 5 are each thread-shaped. The thick thread elements 4 serve to support the thin thread elements 5. The thick thread elements 4 are thicker than the thin thread elements 5.

[0033] The thread elements 4 and 5 are each elongated structures extending along a longitudinal direction. A cross-section perpendicular to this longitudinal direction, which need not be straight, has a round, in particular a circular, outer contour. As in Fig. 6a or Fig. As shown in Figure 7a, the thick thread elements 4 have a diameter d1. The diameter d1 is measured perpendicular to the longitudinal direction of the corresponding thick thread element 4. The diameter d1 corresponds to the largest dimension of the corresponding cross-section of the thick thread element 4.

[0034] As in Fig. 6b or Fig. As shown in Figure 7b, the thin thread elements 5 each have a diameter d2. The diameter d2 is measured perpendicular to the longitudinal direction of the corresponding thin thread element 5. The diameter d2 corresponds to the largest dimension of the corresponding cross-section of the thin thread element 5. The diameter d1 of the thick thread elements 4 is larger than the diameter d2 of the thin thread elements 5. In the embodiment according to the Fig. In sections 1 to 7, the thick thread elements 4 are individually woven, in particular intertwined, to form a support fabric 20, and the thin thread elements 5 are individually woven, in particular intertwined, to form a filter fabric 30. A first variant of the structure of the support fabric 20 is shown in Fig. 6a shown. Fig. Figure 7a shows a second variant of the structure of the supporting tissue 20. A first variant of the structure of the filter tissue 30 is shown in Fig. 6b shown. Fig. Figure 7b shows a second variant of the structure of the filter fabric 30. Fig. Figure 5 shows that the filter fabric 30 is supported by the support fabric 20 during operation. In particular, the filter fabric 30 is directly supported by the support fabric 20 during operation. During operation, the filter fabric 30 lies against the support fabric 20. The thin thread elements 5 of the filter fabric 30 contact the thick thread elements 4 of the support fabric 20 during operation. In particular, when a cooling airflow passes through the filter component 1, the filter fabric 30 and the support fabric 20 lie against each other. However, it can also be designed so that the filter fabric 30 and the support fabric 20 are always in contact with each other. The fabric 70 is formed jointly by the filter fabric 30 and the support fabric 20.

[0035] As in Fig. 4a or Fig. As shown in Figure 5, the support fabric 20 is arranged in the working device 2 such that it forms part of the outer surface 3 of the working device 2. The filter fabric 30 faces an inner area 6 of the working device 2. However, a reversed arrangement of the support fabric 20 and the filter fabric 30 is also possible, as shown in Figure 5. Fig. Figure 4b illustrates this. When the filter fabric 30 is arranged such that it forms part of the outer surface 3 of the working device 2, the resulting smoother surface 3 compared to the reverse arrangement means that the outer surface 3 is also smoother. Dirt and filtered particles then penetrate to a lesser extent towards the supporting fabric 20 and cannot adhere to it to the same degree. Vibrations and shocks during operation of the working device 2 can cause dirt and particles to partially or completely detach from the filter fabric 30 and fall off. This also facilitates cleaning the filter component 1 from the outside, for example with a broom.

[0036] As in Fig. 6a, or Fig. 7a, shown, the support fabric 20 has a support mesh size a1. The filter fabric 30 has a Fig. 6b, or Fig. Figure 7b shows the filter mesh size a2. The mesh size is the clear opening between two adjacent thread elements running in the same direction. The mesh size defines which particle sizes are retained by the support fabric 20 and the filter fabric 30, respectively. If the clear openings of a mesh are different in the two directions perpendicular to the longitudinal extent of the intersecting threads, the mesh size corresponds to the smaller of the two clear openings. The support mesh size a1 of the support fabric 20 is larger than the filter mesh size a2 of the filter fabric 30.

[0037] As in Fig. As shown in Figure 5, an additional support fabric 60 can optionally be provided. In this case, the filter fabric 30 is arranged between the support fabric 20 and the additional support fabric 60. The fabric 70 is then formed by the filter fabric 30, the support fabric 20, and the additional support fabric 60. The additional support fabric 60 is formed analogously to the support fabric 20 from further thick thread elements. The additional thick thread elements are designed analogously to the thick thread elements 4. The additional thick thread elements of the additional support fabric 60 are woven, in particular intertwined, to form the additional support fabric 60. The additional support fabric 60 is formed independently of the support fabric 20. The additional support fabric 60 is formed independently of the filter fabric 30. In the Fig. 4a and Fig. In the variants of filter component 1 shown in 4b, the support fabric 20 and the filter fabric 30 are arranged in layers on top of each other. Fig. In step 5, the support fabric 20, the filter fabric 30, and the further support fabric 60 are layered on top of each other. In all cases, a two- or multi-layered filter is formed.

[0038] As an alternative to designing the filter component 1 with a support fabric 20 and a filter fabric 30, the filter component 1 can be designed according to the Fig. It is provided that, as described in sections 1 to 5, the thick thread elements 4 and the thin thread elements 5 are interwoven, in particular intertwined, to form a single supporting filter fabric 40. In this case, no further supporting fabric 60 is provided. The filtering fabric 70 is then formed exclusively by the supporting filter fabric 40.

[0039] The support filter fabric 40 is in the Fig. 8 and Fig. Figure 9 shows that in the support filter fabric 40, the thick thread elements 4 ensure sufficient mechanical stability of the support filter fabric 40, and the thin thread elements 5 ensure that the mesh size of the support filter fabric 40 is sufficiently small for good filtering effect.

[0040] In the execution according Fig. 6a The thick thread elements 4 of the support fabric 20 are interwoven in plain weave. Similarly, the thin thread elements of the filter fabric 30 are interwoven in Fig. 6b are also interwoven in plain weave. In particular, the thick thread elements 4 and the thin thread elements 5 of the support filter fabric 40 are interwoven in plain weave, analogous to that in the Fig. 6a and Fig. Figure 6b shows the plain weave. In plain weave, each warp thread (warp) lies alternately over and under a weft thread (weft), and each weft thread lies alternately over and under a warp thread. The warp thread is a thread of a warp. The warp is the total number of threads of equal length that are wound approximately parallel on a warp beam or several partial warp beams and fed from there lengthwise to the warp knitting machine. The weft thread is the thread inserted transversely in the fabric, running perpendicular, especially at right angles, to the warp threads. The term "thread" can also be replaced by "wire" in all word formations containing it. This describes the situation more accurately, especially for woven or knitted fabrics made of metal (or plastic). Accordingly, the warp threads can also be called warp wires and the weft threads can also be called weft wires.

[0041] In the execution according Fig. 7a The thick thread elements 4 of the support fabric 20 are interwoven in a twill weave. Similarly, the thin thread elements of the filter fabric 30 are interwoven in Fig. 6b are also interwoven in twill weave. In particular, the thick thread elements 4 and the thin thread elements 5 of the supporting filter fabric 40 are interwoven in twill weave, analogous to that in the Fig. 7a and Fig. Figure 7b shows the twill weave. Twill weave is characterized by a distinctive diagonal pattern created by the specific arrangement of the warp and weft threads. In twill weave, the weft thread is passed over a warp thread, then under at least two warp threads, then over another warp thread, and so on. This rhythm is continued in the next row, offset by one warp thread. The offset always occurs in the same direction. This results in a surface texture with diagonal grooves, which are called ridges.

[0042] The thick thread elements 4 have a greater stiffness than the thin thread elements 5. The additional thick thread elements of the further support fabric 60 also have a greater stiffness than the thin thread elements 5. In the exemplary embodiments, the thick thread elements 4 and / or the thin thread elements 5 are made of metal, in particular of non-corrosive metal, especially stainless steel. However, it is also possible for the thick thread elements 4 and / or the thin thread elements 5 to be made of plastic. These material specifications apply both to exemplary embodiments in which the filter component 1 comprises a support fabric 20 and a filter fabric 30 and optionally an additional further support fabric 60, and to exemplary embodiments in which the filter component 1 comprises a support filter fabric 40. Material combinations are also conceivable.For example, the thick thread elements 4 can be made of metal, in particular non-corrosive metal, especially stainless steel, and the thin thread elements 5 of plastic. It is also conceivable that the thick thread elements 4 are made of plastic and the thin thread elements 5 of metal, in particular non-corrosive metal, especially stainless steel. If the additional support fabric 60 is provided, the additional thick thread elements are made of the same material as the thick thread elements 4 of the support fabric 20. However, it is also possible that the additional thread elements of the additional support fabric 60 are made of a different material than the thick thread elements 4 of the support fabric 20.

[0043] In the exemplary embodiment according to Fig. In Figure 8, the thick thread elements 4 and the thin thread elements 5 of the support filter fabric 40 are woven together to form a twill weave. In particular, in twill weaves, either the warp or weft threads lie so close together that no stitch is visible in the projection (zero stitch), thus achieving a very good filtering effect. The filtration occurs through the spaces located partly within the twill weave. If the warp threads lie very close together, they are also referred to as reverse twill or reinforced weave fabrics. In the embodiment according to... Fig. 8. The thick thread elements 4 run longitudinally without significant local curvature. Essentially, the thick thread elements 4 run almost straight along their entire longitudinal extent. A slight curvature may also be provided along the entire longitudinal extent of the thread elements 4. In particular, the thick thread elements 4 are not curved in the areas where they intersect with the thin thread elements 5, such that their course conforms to the course of the intersecting thin thread elements 4.

[0044] As especially in the Fig. 2, Fig. 3, Fig. 10, Fig. 16, Fig. 19 and Fig. As shown in Figure 20, the filter component 1 has a frame 7. The frame 7 encloses the fabric 70. As shown in Fig. 4a or Fig. As shown in Figure 4b, the filter component 1 is designed to allow cooling air to flow through it in a flow direction 50. The flow direction 50 runs transversely, in particular perpendicularly to the surface of the fabric 70, especially to the surface of the support fabric 20 and / or the filter fabric 30, or the support filter fabric 40. In the installed state of the filter component 1, the flow direction 50 is transversely, in particular perpendicularly to the outer surface 3 of the working tool 2. It can also be provided that the flow direction 50 runs perpendicular to a tool plane of the tool 10. The frame 7, in particular a circumferential frame 19 of the frame 7, runs completely around the flow direction 50. The circumferential frame 19 encloses the fabric 70 at an edge 78 of the fabric 70. The frame 7 limits the fabric 70 with respect to the flow direction 50 of the cooling air from both sides of the fabric 70.In particular, the frame 7 delimits an assembly, especially a component unit, consisting of filter fabric 30 and support fabric 20, and in particular further support fabric 60, with respect to the flow direction 50 of the cooling air from both sides of the assembly, especially component unit. In the exemplary embodiments, the frame 7 is injection molded around the fabric 70, especially around the filter fabric 30 and the support fabric 20, and in particular around the edge of the further support fabric 60. The edge of the fabric 70, especially of the assembly, especially the component unit, consisting of filter fabric 30 and support fabric 20, is then received in the frame 7.

[0045] The frame 7 projects beyond the fabric 70 towards the outer side 3. This protects the fabric 70, at least to some extent, from mechanical stress. The filter component 1 has a total height b1 measured in the flow direction 50 (exemplary for all embodiments in the Fig. 4a and Fig. (Figure 4b). The frame 7 has a point of greatest distance b2 to the fabric 70, the greatest distance b2 being measured in the flow direction 50. In the exemplary embodiments, there is a region 26 of the frame 7 circumferentially around the flow direction 50, which has the greatest distance b2 to the fabric 70. The distance b2 is at least 50%, in particular at least 60%, of the total height b1 of the filter component 1.

[0046] In the exemplary embodiments, the filter component 1 has at least one connecting rib 8, 9, and in particular at least two connecting ribs 8, 9. The at least one connecting rib 8, 9 is arranged on the thin thread elements 5 and / or the thick thread elements 4. The at least one connecting rib 8, 9 is provided for arrangement on the outer surface 3 of the working device 2. In the installed state of the filter component 1, the at least one connecting rib 8, 9 forms part of the outer surface 3 of the working device 2. As shown in Fig. As shown in Figure 2, the at least one connecting rib 8, 9 connects two opposing points of the circumferential frame 19.

[0047] Filter component 1 has a maximum dimension g measured perpendicular to the flow direction 50. At least two connecting ribs 8 and 9 have a region z, as shown in Fig. 2 is shown. The length of region z, measured in the longitudinal direction of connecting rib 8 and / or connecting rib 9, is at least 20%, and in particular at least 30%, of the largest dimension g of the filter component 1. In region z, the at least two connecting ribs 8, 9 do not intersect. In region z, the at least two connecting ribs 8 and 9 are separate from each other. In region z, the at least two connecting ribs 8 and 9 do not intersect. In region z, the at least two connecting ribs 8 and 9 do not contact each other. In region z, no rib runs transversely to the connecting ribs 8 and 9. In the exemplary embodiments, the connecting ribs 8 and 9 run substantially parallel to each other. The space between the at least two ribs 8 and 9 in region z is free of transverse ribs running perpendicular to the at least two ribs 8 and 9.

[0048] As in Fig. Figure 5 shows, by way of example, the connecting rib 9; the at least two connecting ribs 8, 9 enclose at least a part of the thick thread elements 4 (in Fig. 5 contained in the supporting tissue 20) and at least a part of the thin thread elements 5 (in Fig. 5 contained in the filter fabric 30) with respect to the flow direction 50 of the cooling air from both sides.

[0049] As in Fig. As shown in Figure 1, the filter component 2 can be attached to the base body 11 of the working device by means of the single fastening element 12. The fastening element 12 is the only component by which the filter component 2 is attached to the base body 11. The fastening element 12 is arranged centrally on the filter component 1. The fastening element 12 is arranged on the filter component 1 at a distance from the circumferential frame 19, measured in particular in a direction perpendicular to the flow direction 50. The fastening element 12 is arranged in the surface of the fabric 70 at a distance from the edge 78 of the fabric 70, measured in particular in a direction perpendicular to the flow direction 50. In particular, the fastening element 12 is perpendicular to the tool plane of the tool 10 in the side view ( Fig. 1) can be attached approximately in the middle of the filter component 1, in particular in the middle of the fabric 70, in particular at the center of gravity of the area associated with the outer contour of the filter 28.

[0050] The fastening element 12 completely penetrates the fabric 70 in the direction of flow 50. In the exemplary embodiments, the fastening element 12 is arranged in the area of ​​a connecting rib, as for example in Fig. Figure 2 shows the fastening element 12. The fastening element 12 completely penetrates the connecting rib in the flow direction 50. In the exemplary embodiments, the fastening element 12 is a screw. The screw is screwed through the filter component 1 into the base body 11 of the working device 2. This presses the filter component 1 against the base body 11.

[0051] To attach the filter component 1 to the base body 11 by means of the fastening element 12, the filter component 1 can be brought close to the base body 11 in a fastening direction 49 during fastening. The fastening direction 49 is in Fig. Figure 2 shows the following embodiments. In these embodiments, the fastening direction 49 runs in the same direction as the flow direction 50. The fastening direction 49 runs transversely, in particular perpendicularly to the surface of the fabric 70, especially to the surface of the support fabric 20 and / or the filter fabric 30, or the support filter fabric 40. When the filter component 1 is installed, the fastening direction 49 is transversely, in particular perpendicularly to the outer surface 3 of the working device 2. The fastening element 12 secures the filter component 1 to the base body 11 with respect to the fastening direction 49.

[0052] When the filter component 1 is attached, it forms part of the outer surface 3 of the working device. Cooling air can then flow through the filter component 1 from the outside into the inner area 6 of the working device 2 in the direction of flow 50.

[0053] The outer housing of the base body 11 has, in a side view perpendicular to the tool plane of the tool 10, a housing outer contour 27, as shown in Fig. Figure 1 shows the housing. The housing outer contour 27, in an imaginary projection onto the tool plane, defines an imaginary housing surface. The projection is perpendicular to the tool plane. The filter component 1, in particular the fabric 70, has a filter outer contour 28, in an imaginary projection onto the tool plane. The projection is perpendicular to the tool plane. The filter outer contour 28 defines an imaginary filter area in the tool plane. The filter area is at least 5%, in particular at least 10%, in particular at least 15%, in particular at least 18% of the housing surface. As a result, the filter component 1 occupies a large part of the outer surface 3 of the working device 1 in side view. The filter component 1 is large compared to filter components known from the prior art.When fastened with only a single fastening element 12, the large size of the filter component 1 can lead to significant distortion. The filter component 1 may be in contact with the base body 11 at one point along its edge, but not at another, particularly opposite, point.

[0054] As in the Fig. Figures 16 to 19 and 22 show a sealing element 77 arranged between the filter component 1, in particular the frame 7 of the filter component 1, and the base body 11. Although the Fig. Where 16 to 23 show an alternative embodiment, this applies to all embodiments and is illustrated below using the embodiment of the following as an example. Fig. Sections 16 to 23 are applicable to all embodiments and are described in more detail below. The sealing element 77 serves to seal between the base body 11 and the filter component 1, in particular the frame 7 of the filter component 1, against the ingress or egress of air. The sealing element 77 is made of elastomer, in particular of thermoplastic elastomer. The sealing element 77 runs along a groove in the Fig. 19 and Fig. The sealing element 77 rotates in the direction of rotation 48, in particular in a closed position, as shown in Figure 20. The flow direction 50 and / or the fastening direction 49 run transversely, in particular perpendicularly, to the direction of rotation 48. In the view in the flow direction 50 and / or in the fastening direction 49, the sealing element 77 rotates in a closed position around the fastening element 12. The fastening element 12 is arranged approximately in the middle of the closed, rotating sealing element 77. The sealing element 77 rotates in a closed position around the flow direction 50 and / or the fastening direction 49.

[0055] The sealing element 77 is deformable, in particular elastically deformable, and in particular compressible, in particular elastically compressible, in the fastening direction 49 between the filter component 1, in particular the frame 7, and the base body 11. When fastening the filter component 1 to the base body 11, it may be necessary to exert considerable pressure on the filter component 1 by means of the fastening element 12 so that the sealing element 77 seals everywhere between the filter component 1, in particular the frame 7, and the base body 11 and any possible distortion of the filter component 1, in particular of the base body 11, is compensated for. In order to avoid undesirably large compression, in particular elastic deformation, of the sealing element 77, the working device 2 comprises at least one stop element 130, as shown in Fig. 23 shown.

[0056] In the exemplary embodiments, the fabric 70 is at least partially, and in particular entirely, made of metal. The frame 7 is made of plastic.

[0057] The at least one stop element 130 is arranged between the base body 11 and the frame 7. The stop element 130 limits the approach of the frame 7 and the base body 11 in the fastening direction 49 during the fastening of the filter component 1 to the base body 11. This prevents unwanted deformation, in particular compression, of the sealing element 77 in the area of ​​the stop element 130. The stop element 130 bridges a gap 131 between the base body 11 and the frame 7. In particular, the stop element bridges the gap 131 locally. The gap 131 is in Fig. 22 and Fig. 23 shown. The stop element 130 bridges the gap 131 between the base body 11 and the frame 7, particularly with respect to the direction of rotation 48, in a locally limited manner.

[0058] In particular, the stop element 130 extends only over a local partial area of ​​a full revolution with respect to the direction of rotation 48 of the sealing element 77. This partial area corresponds, in particular, to an angular range of < 20° with respect to one revolution around the fastening element 12. In particular, the angular range is > 0.5°. Specifically, the stop element 130 bridges the gap 131 between the frame 7 and the base body 11 such that, in the direction of rotation 48 upstream of the stop element 130, a first distance c1, measured in the fastening direction 49, is formed between the frame 7 and the base body 11, and that, in the direction of rotation 48 downstream of the stop element 130, a second distance c2, measured in the fastening direction 49, is formed. In the exemplary embodiment, the first distance c1 and the second distance c2 are equal.

[0059] In particular, the at least one stop element 130 limits compression, especially elastic compression, and especially deformation, of the sealing element 77 in the fastening direction 49. Both the frame 7 and the base body 11 are harder than the sealing element 77. The sealing element 77 is elastic. In the exemplary embodiments, the sealing element 77 is a thermoplastic elastomer.

[0060] The sealing element 77 has a feature in Fig. The compression point 132 shown in Figure 22, located between the frame 7 and the base body 11, has a compression height h2 measured in the fastening direction 49 in the fully compressed, and in particular deformed, state. In the uncompressed state, the sealing element 77 has a sealing element height h2 measured in the same direction 49 at the same compression point 132. The uncompressed state is also referred to as the undeformed state. In particular, the at least one stop element 130 limits the compression, and in particular the deformation, of the sealing element 77 in the fastening direction 49 at the compression point 132 such that the compression height h2 is at least 50%, in particular at least 70%, in particular at least 80%, in particular at least 90%, and in particular at least 95% of the sealing element height h1.It can be provided that the sealing element 77 is compressed, in particular deformed, at the compression point 132 from the sealing element height h2 to the sealing element height h1 during the fastening of the filter component 1 to the base body 11 by means of the fastening element 12. The stop element 130 limits the compression, in particular deformation, of the sealing element 77 at the compression point 132 to the compression height h2.

[0061] As particularly in Fig. As can be seen in Figure 22, the sealing element 77 is essentially U-shaped in a section transverse, in particular perpendicular, to the direction of rotation 48. The open end of the U points towards the base body 11 in the fastening direction 49. The two legs of the U encompass a web 29 projecting towards the filter component 1 in the opposite direction to the fastening direction 49. At least one leg rests against the web 29. As shown in Fig. As shown in Figure 20, the web 29 runs completely around the fastening element 12 in the circumferential direction 48. The sealing element 77 forms a circumferential groove to receive the web 29. For a seal between the frame 7 and the base body 11, it is not necessary for the bottom of this groove to rest against the web 29. It is sufficient that at least one of the two groove flanks rests against the web 29, in particular around its entire circumference.

[0062] As in Fig. As shown in 10, the frame 7 has a circumferential frame edge 17 in the direction of rotation 48, in particular when closed. As in Fig. As shown in Figure 20, the base body 11 has a base body surface 18 that circumferentially in the direction of rotation 48, in particular in a closed manner. In the exemplary embodiments, the base body surface 18 is also referred to as the base body ring surface. In particular, the at least one stop element 130 projects in the fastening direction 49 beyond the frame edge 17 and / or in the direction opposite to the fastening direction 49 beyond the base body surface 18. In the exemplary embodiment according to Fig. 10, the at least one stop element 130 is fixed to the frame 7 of the filter component 1. However, it can also be provided that the at least one stop element 130 is fixed to the base body 11 of the hand-held working device 2 or – as in the exemplary embodiment according to the Fig. 20 and Fig. 21 - is fixed to both the base body 11 and the frame 7. If at least one stop element 130 is fixed to both the frame 7 and the base body 11, the stop element 130 is divisible.

[0063] In the exemplary embodiments, the at least one stop element 130 is formed with the frame 7 in a single material, in particular monolithically. The at least one stop element 130 is formed with the frame 7 in a single material. The at least one stop element 130 is made of plastic.

[0064] In the exemplary embodiments, the at least one stop element 130 is designed as a pin. The pin has a diameter, measured in particular transversely, in particular perpendicular to the fastening direction 49, in particular perpendicular to the flow direction 50. The diameter of the pin is from 1 mm to 6 mm, in particular from 2 mm to 5 mm.

[0065] When the filter component 1 is attached to the base body 11, in the exemplary embodiments the filter component 1 abuts the base body 11 with the stop element 130, in particular the base body surface 18.

[0066] A distance r, measured in a direction perpendicular to the fastening direction 49, between the sealing element 77 and the at least one stop element 130 is less than five times, in particular three times, and in particular one time, the sealing element height h1. The distance r is measured in a direction perpendicular to the circumferential direction 48. In the exemplary embodiment, the distance r is greater than 10% of the sealing element height h1. However, it can also be provided that there is no distance between the sealing element 77 and the at least one stop element 130.

[0067] As in Fig. Figure 10 shows at least two, and in particular several, stop elements 130, which are spaced apart from each other with respect to the direction of rotation 48. In the exemplary embodiment, at least two of the at least two stop elements 130 have an angular distance of at least 135° from each other, measured in the direction of rotation 48. In the exemplary embodiment, a total of six stop elements 130 are provided. In an alternative embodiment, only a single stop element 130 may be provided.

[0068] During the fastening of the filter component 1 to the base body 11, the filter component 1 is brought close to the base body 11 in fastening direction 48 by means of a fastening element 12. In the exemplary embodiments, the fastening element 12, which is designed as a screw, is screwed into the base body 11. The approach of the frame 7 and the base body 11 with respect to the fastening direction 48 is limited during the fastening of the filter component 1 to the base body 11 by the at least one stop element 130.

[0069] Filter component 1 after Fig. 10 will be in one in the Fig. 11 to 15 (especially Fig. 13) is produced in the casting tool 69, in particular in an injection mold. First, a test filter component without stop elements 130 is produced in the casting tool 69. The test filter component is attached to the base body 11 of the working device 2 to determine where and in what shape the at least one stop element 130 is required. Subsequently, the casting tool 69 is modified so that, during the subsequent production of the filter component 1 in the modified casting tool 69, the at least one stop element 130 is formed during a casting process step, in particular an injection molding process step. The modified casting tool 69 is then used to produce further filter components 1. Further modification of the casting tool 69 is not necessary. A single modification of the casting tool 69 is sufficient to subsequently produce many filter components 1.The filter components 1 then fit onto base bodies 11, all of which were manufactured using the same base body casting tool to which the modified casting tool 69 is adapted.

[0070] A modification of the casting tool 69 can consist of milling a recess in the casting tool 69, in particular in one or both tool halves 71 and 72 of the casting tool 69, and / or in adding a projection to the casting tool 69, in particular to one or both tool halves 71 and 72 of the casting tool 69. Modifications can be provided at several locations.

[0071] As in Fig. As shown in Figure 1, the tool 10, in particular the guide rail 21, has a longitudinal center axis 13. In the exemplary embodiment, the longitudinal center axis 13 is arranged between the at least two connecting ribs 8 and 9 when viewed in the direction of flow 50 of the cooling air.

[0072] According to the alternative embodiment as described in the Fig. In sections 16 to 23, the filter component 1 includes a sighting element 110. The sighting element 110 serves as a sighting aid for aligning the working device 2, in particular for aligning the tool 10 of the working device 2, especially the guide rail 21. When the filter component 1 is mounted on the base body 11, the sighting element 110 is arranged at a distance from the tool 10. Even if the tool 10 is obscured, for example by a workpiece or embedded in a workpiece to be machined, the orientation and position of the tool 10 can be determined via the sighting element 110. The sighting element 110 is part of the outer surface 3 of the working device 2. The sighting element 110 is arranged on the frame 7 of the filter component 1.

[0073] The gauging element 110 and the sealing element 77 are formed together from a single material. The gauging element 110 and the sealing element 77 are monolithically formed together as a gauging and sealing element 111. This is particularly evident in Fig. As can be seen in Figure 19. The gauging element 110 and the sealing element 77 are designed together as a gauging and sealing element 111. The gauging element 110 and the sealing element 77 are manufactured together in a single process step, in particular a casting process step, in particular an injection molding process step.

[0074] Both the locating element 110 and the sealing element 77 are made of a thermoplastic elastomer.

[0075] As in Fig. As shown in Figure 17, the filter component 1 has an inner surface 14 facing the base body 11 when the filter component 1 is installed, and an outer surface 15 facing away from the base body 11 when the filter component 1 is installed. At least one flow opening 16 completely penetrates the filter component 1 from the inner surface 14 to the outer surface 15. The position of the at least one flow opening 16 is shown in Figure 17. Fig. Figure 16 is shown schematically with a dotted circle. The flow opening 16 penetrates the filter component 1, in particular the frame 7 of the filter component 1, completely in the flow direction 50. Material, in particular plastic material, can flow through the flow opening 16 during a casting process step, in particular during an injection molding process step, especially during a plastic injection molding process step. At least two flow openings 16 are provided; in the exemplary embodiments, four flow openings 16 are provided.

[0076] The gauging and sealing element 111 extends through the flow opening 16. The gauging and sealing element 111 completely fills the flow opening 16.

[0077] As in the Fig. 17 and Fig. As shown in Figure 18, the frame 7 has a channel 80 on the inside 14 of the filter component 1 for receiving the sealing element 11. The frame 7 has a guide element channel 114 on the outside 15 of the filter component 1 for receiving the guide element 110. The channel 80 has the form of a groove. During the injection molding process step, the open longitudinal side of the groove of the channel 80 is formed by a Fig. The second tool half 72 of the casting tool 69, as shown in Figure 13, faces the guide element channel 114, which has the form of a groove. During the injection molding process step, the open longitudinal side of the groove of the guide element channel 114 is oriented towards a Fig. 13 facing the first tool half 71 of the casting tool 69 shown.

[0078] The flow opening 16 connects the channel 80 and the gauge element channel 114. During the casting process step, particularly during the injection molding process step, especially during the plastic injection molding process step, material, particularly plastic, can flow through the gauge element channel 114 on the outer surface 15 of the filter component 1 to the flow opening 16 and through the flow opening 16 into the channel 80 on the inner surface 14 of the filter component 1. The flow opening 16 is a connecting hole in the frame 7 for connecting the inner surface 14 with the outer surface 15. The gauge element 110 and the sealing element 77 are cast in a single casting process step, particularly a single injection molding process step, especially a single plastic injection molding process step. In this process, the gauge and sealing element 111 is formed. In particular, the gauge and sealing element 111 is formed monolithically.

[0079] The gauging element channel 114 has a channel width k, measured in particular in the direction perpendicular to the mounting direction 49, and in particular to the flow direction 50, as shown in Fig. 19 is shown. The flow opening 116 has a Fig. 18 or Fig. The diameter d shown in Figure 17 is measured in a direction perpendicular to the fastening direction 49, and in particular to the flow direction 50. In the exemplary embodiments, the diameter d of the flow opening 116 is at least 60%, in particular at least 70%, and in particular at least 80%, of the channel width k. In particular, the diameter d of the flow opening is at least 0.5 mm, and in particular at least 1 mm. This makes the flow opening 116 large enough for the material to flow through it easily. In particular, the diameter d of the flow opening 116 is at most 4 mm, and in particular at most 3 mm. This makes the flow opening 116 small enough to be filled efficiently using a small amount of material.

[0080] The gauging element 110 is arranged on the outer surface 15 of the filter component 1. The sealing element 77 is arranged on the inner surface 14 of the filter component 1. The base body 11 and the gauging element 110 are color contrasting. The base body 11 has a different color on its outer surface 3 than the gauging element 110. The frame 7 and the gauging element 110 are also color contrasting. Immediately adjacent to the gauging element 110, the frame 7 has a different color than the gauging element 110 at that point. In particular, the gauging element 110 is a single color. In particular, the frame 7 is a single color.

[0081] The tool 10 has a longitudinal extent. The longitudinal extent of the tool 10 runs along the longitudinal center axis 13 of the tool 10, in particular the guide rail 21. The sighting element 110 has a scoring bar 112 and / or a felling bar 113. In the exemplary embodiment, the sighting element 110 has both a scoring bar 112 and a felling bar 113. The scoring bar 112 extends, in the installed position of the filter component 1, substantially in the direction of the longitudinal extent, in particular in the direction of the longitudinal center axis 13. The felling bar 113 extends, in the installed position of the filter component 1, in a direction transverse, in particular perpendicular, to the direction of the longitudinal extent, in particular to the direction of the longitudinal center axis 13. This applies in particular to a view of the working device 2 in the flow direction 50. This applies in particular to a view perpendicular to the tool plane of the tool 10.

[0082] The inlet strip 112 has in particular a first inlet strip section 115 and a second inlet strip section 116. The first inlet strip section 115 and the second inlet strip section 116 are, in view in the flow direction 50, particularly shaped in relation to each other.

[0083] The drop bar 113 has in particular a first drop bar section 117 and a second drop bar section 118. The first drop bar section 117 and the second drop bar section 118 are, in view in the direction of flow 50, particularly dissimilarly designed relative to each other.

[0084] The uniform, and in particular monolithic, design of the probe bar 112 of the gauge element 110 and the drop bar 113 of the gauge element 110 on the outer surface 15 of the filter component 1 is not apparent. Viewed from the outer surface 15 of the filter component 1 in the flow direction 50, the drop bar 113 and the probe bar 112 appear to be separate components. No connection between the probe bar 112 and the drop bar 113 is visible from the outside. The probe bar 112 and the drop bar 113 are arranged in such a way that the uniform, and in particular monolithic, design of the probe bar 112 of the gauge element 110 and the drop bar 113 of the gauge element 110 on the outer surface 15 of the filter component 1 is not apparent. The cutting bar 112 and the felling bar 113 are arranged in such a way that they appear separated from each other by coverings, in particular by the frame 7.

[0085] In the manufacture of the filter component 1, the fabric 70 is, for all embodiments, overmolded in a casting process step between the first tool half 71 and the second tool half 72, so that the frame 7 is formed. Fig. Figures 12 to 15 show exclusively for the embodiment according to Fig. 10 the positioning of the fabric 70 between the first tool half 71 and the second tool half 72. In the in Fig. In the position shown in Figure 15, the fabric 70 is clamped between the first tool half 71 and the second tool half 72. The pin 73 completely penetrates the fabric 70 in the direction of the first tool half 71 and the second tool half 72. During the casting process step, a retaining opening 75 is created at the location of the pin 73 in the frame 7, completely penetrating the frame 7 in the direction of the first tool half 71 and the second tool half 72. The position of the retaining opening 75 is shown in Fig. Figure 10 shows the pin 73, which holds the fabric 70 in position during the casting process step. In particular, the pin 73 penetrates the fabric 70 at a point that is overmolded during the casting process step, so that the frame 7 is formed at or around this point. The fabric 70 has a through-opening 74 for the pin 73 to penetrate it. In the exemplary embodiment according to... Fig. 10 The retaining opening 75 completely penetrates the frame 7 in the flow direction 50. In the alternative embodiment according to Fig. 25 no holding opening 75 is created at all.

[0086] In both cases, the filter component 1 includes a blockage that prevents the flow of cooling air through the filter component 1 in the direction of flow 50 in the area of ​​the through-opening.

[0087] In the exemplary embodiment according to Fig. 10. In a sealing process step following the casting process step, the through-opening 74, in particular the retaining opening 75 in the frame 7, is closed with a sealing element 76 made of elastomer. In this case, the blockage is the sealing element 76. In particular, the sealing element 76 is made of a thermoplastic elastomer. The through-opening 74 penetrates the fabric 70 completely in the direction from the first tool half 71 to the second tool half 72, in particular in the direction opposite to the flow direction 50. During the casting process step, the pin 73 is guided through the through-opening 74.

[0088] During the casting process step, the fabric 70 is permanently threaded onto the pin 73 via the through-hole 74. During this step, the pin 73 contacts both the first tool half 71 and the second tool half 72. Movement of the fabric 70 in or against the direction of penetration 50 is limited by either the first tool half 71 or the second tool half 72. The fabric 70 cannot be removed from the pin 73.

[0089] In all embodiments, the fabric 70 is rigid. In particular, the fabric 70 is self-supporting. When supported at one point, the fabric 70 is dimensionally stable.

[0090] In all embodiments, the frame 7 is manufactured in the casting process step by means of an injection molding process, in particular by means of a plastic injection molding process.

[0091] Filter component 1 comprises a Fig. The connection structure 32 shown in Figure 10 connects at least two opposing points of the circumferential frame 19 of the frame 7. The connection structure 32 is part of the frame 7. The connection structure 32 comprises the connecting rib 8 and the connecting rib 9. In the embodiment shown in Figure 10, the connection structure 32 is formed by connecting rib 8 and connecting rib 9. Fig. 10 is the retaining opening 75 in the connecting structure 32. In particular, a second retaining opening is provided in the connecting structure 32. The through-opening 74 is also arranged at the location of the retaining opening 75. For all embodiments with a through-opening, the through-opening 74 is arranged at a distance from the circumferential frame 19. In this case, the distance is measured perpendicular to the fastening direction 49, in particular perpendicular to the flow direction 50. The through-opening 74 is arranged at a distance from the edge 78 of the fabric 70 in the surface of the fabric 70, measured in a direction perpendicular to the flow direction 50, in particular to the fastening direction 49. In particular, the through-opening 74 is, in a side view, perpendicular to the tool plane of the tool 10 ( Fig. 1 (not shown here) is arranged approximately in the middle of the filter component 1, in particular in the middle of the fabric 70. In particular, the through-opening 74 is arranged in this side view near the centroid of the surface associated with the outer contour 28 of the filter.

[0092] How the comparison of Fig. 13, Fig. 14 and Fig. As shown in Figure 15, after threading the fabric 70 onto the pin 73, the fabric 70, together with a support element 83 (on whose support surface 82 the fabric 70 is placed) and the second tool half 72, is moved towards the first tool half 72, so that at the end the fabric 70 rests against both the first tool half 71 and the second tool half 72. During the approach movement of the first tool half 71 and the second tool half 72, the distance between the support element 83 and the first tool half 71 is reduced until it eventually disappears. Similarly, during the approach movement of the first tool half 71 and the second tool half 72, the retaining element 84 disappears into the second tool half 72. The second retaining element 84 no longer protrudes from the second tool half 72 at the end.

[0093] In all embodiments, the fabric 70 is cast around the frame 7 during the casting process step. In the embodiment according to Fig. In this process, the retaining opening 75 is created in the frame 7. After the casting process step, the retaining opening 75 is closed with the closing element 76. The closing element 76 is cast while the frame 7 and the fabric 70 are located between the first mold half 71 and the second mold half 72. Between the casting process step and the sealing process step, the fabric 70, in particular the filter component 1, is continuously located between the first mold half 71 and the second mold half 72 in all embodiments.

[0094] In the sealing process step, the sealing element 77 is produced in all embodiments. First, in the casting process step, plastic is introduced into the casting tool 69. Only subsequently is an elastomer, in particular a thermoplastic elastomer, introduced into the casting tool 69. This is how the sealing element 77 is produced.

[0095] For the exemplary embodiment according Fig. 10. The sealing element 77 and the closure element 76 are cast in a single casting step. The sealing element 77 and the closure element 76 are made of a single material, in particular monolithically. The retaining opening 75 in the frame 7 serves, during the casting of the material for the production of the sealing element 77, to vent air displaced by the material during the sealing process step. This applies to the embodiment according to Fig. 10.

[0096] In all embodiments, the frame 7 has a sprue opening 79 for pouring in the material to produce the sealing element 77, as shown by way of example in Fig. Figure 10 illustrates this. In the exemplary embodiments, the material for manufacturing the sealing element 77, in particular for manufacturing the guide and sealing element 111, is applied to the outer surface 15 of the filter component 1, specifically to the frame 7. Both the material for manufacturing the frame 7, in particular the plastic material, and the material for manufacturing the sealing element 77, in particular the guide and sealing element 111, in particular the thermoplastic elastomer, are applied to the same side of the filter component 1, in particular the frame 7, specifically to the outer surface 15. This allows for a simple design of the respective casting tool.

[0097] In the exemplary embodiment according to Fig. In step 10, the material for the production of the sealing element 77 passes through the sprue opening 79 from the outer surface 15 to the inner surface 14 and into the channel 80. The material flows into the channel 80 and forms the sealing element 77 within it. During this process, the material, particularly the thermoplastic elastomer, displaces air. This air can escape through the retaining opening 75 in the frame 7. As described above, the channel 80 extends along the edge of the frame 7 to accommodate the sealing element 77. The channel 80 runs continuously around the frame 7. The retaining opening 75 is positioned at a distance from the edge of the frame 7. The channel 80 and the retaining opening 75 are connected via a connecting channel 81 of the frame 7. The connecting channel 81 extends from the channel 80 to the retaining opening 75. The connecting channel 81 is formed in the connecting rib 8. In the exemplary embodiment, a connecting channel 81 is also formed in the connecting rib 9.Channel 80 and connecting channel 81 are arranged on the inner surface 14 of the filter component 1. The retaining opening 75 extends completely through the frame 7 from its inner surface 14 to the outer surface 15 in the opposite direction to the flow direction 50. During the manufacture of the filter component 1, particularly during the sealing process step, the inner surface 14 of the filter component 1 faces the first mold half 71. During the preceding casting process step, both channel 80 and connecting channel 81 are filled by a component of the first mold half 71. This is what creates the channel 80 and connecting channel 81 in the first place. During the casting process step, a cavity is formed between the first mold half 71 and channel 80, and also between the first mold half 71 and connecting channel 81.In this embodiment, this cavity is provided by removing or retracting placeholders that protrude towards the fabric 70 during the casting process step from the first mold half 71. This creates space for the material that flows into the channel 80 to produce the sealing element 77. It also creates space for the material that flows through the connecting channel 81 into the retaining opening 75, completely filling it and forming the closure element 76. The air displaced by the material used to produce the sealing element 77 and the closure element 76 can escape on the outer surface 15 of the filter component 1. Therefore, during the sealing process step, the channel 80 and the connecting channel 81 can remain covered, particularly airtight, by the first mold half 71.The displaced air can flow through the space in the channel 80 of the connecting channel 81, which is not yet filled with the material used to manufacture the sealing element 77, to the retaining opening 75 and escape on the outside 15 of the filter component 1. This allows for simple venting of the channel 80 and the connecting channel 81 during the sealing process step. Both the sealing element 77 and the closure element 76 can be manufactured in a single casting process step. In this casting process step, both the sealing element 77 and the closure element 76 are made of thermoplastic elastomer. The retaining opening 75 is then closed with the closure element 76, which is made of elastomer, in particular thermoplastic elastomer.

[0098] In the exemplary embodiment according to the Fig. In steps 16 to 23, venting during the sealing process is carried out differently. The position of the gate opening 79 is shown in Fig. 16 and in Fig. 19 is marked. It is located above the guide element channel 114, in particular above the channel for forming the scoring bar 112. Starting from the sprue opening 79, the material for manufacturing the guide and sealing element 111 flows in two directions in the guide element channel 114, in particular in the channel for forming the scoring bar 112. One direction leads away from the circumferential frame 19, the other direction towards the circumferential frame 19 and towards the flow opening 16 ( Fig. 19). Through the flow opening 16, the material passes from the outside 15 of the filter component 1, in particular the frame 7, to the inside 14 of the filter component 1, in particular the frame 7 ( Fig. 17 and Fig. 18). On the inner side 14 of the filter component 1, in particular the frame 7, the material flows through the channel 80 and thereby forms the sealing element 77 as part of the sealing and leveling element 111. Through a further flow opening 16, the material from the channel 80 on the inner side 14 returns to the outer side 15 and flows there in the channel to form the settling bar 113. The channel for forming the settling bar 113 and the channel for forming the probe bar 112 are both components of the leveling element channel 114. The channel for forming the settling bar 113 and the channel for forming the probe bar 112 are formed separately from each other. The direction of the longitudinal extent of the channel for forming the settling bar 113 runs transversely, in particular perpendicularly, to the direction of the longitudinal extent of the channel for forming the probe bar 112, in particular in view in the direction of flow 50.Viewed in the direction of flow 50, the imaginary extension lines of the channel forming the drop bar 113 and the channel forming the puncture bar 112 intersect orthogonally. At the end of the channel forming the drop bar, another flow opening is formed, this time from the outer surface 15 to the inner surface 14. This opening allows venting of the material spreading from the gate opening 79 towards the circumferential frame 19. Venting in the opposite direction occurs through another flow opening from the outer surface 15 to the inner surface 14 at the end of the channel forming the puncture bar 112.

[0099] In an alternative version to the version according Fig. 10 The blockage, which prevents the flow of cooling air through the filter component 1 in the direction of flow 50 in the area of ​​the passage opening 74, can be formed in a manner other than by a closing element 76. Fig. Figure 25 schematically shows a corresponding filter component 1. All embodiments have in common that the through-opening 74, in particular an edge of the through-opening 74, is surrounded by material of the frame 7. Fig. 10 The passage opening 74 is surrounded by the retaining opening 75, which is formed by the frame. In the exemplary embodiment according to Fig. 25 the passage opening 74 is surrounded by the frame 7 in a direction perpendicular to the flow direction, in particular in the radial direction.

[0100] The through-opening 74 is covered by the connecting structure 32. In all embodiments, the connecting structure 32 connects at least two points of the circumferential frame 19. With respect to this connection, the connecting structure 32 is defined according to the embodiment shown. Fig. 25 analogous to the one in Fig. The connection structure 32 shown in 10 is formed.

[0101] In the exemplary embodiment according to Fig. 25, the blockage is a cover section 33. The cover section 33 is in Fig. 25 is marked with a dashed line. The cover section 33 is located exclusively in the area above or below the passage opening 74, either in the direction of the flow 50 or in the opposite direction to the flow 50. The cover section 33 is arranged exclusively in the area of ​​a projection of the passage opening 74 in the direction of the flow 50 or in the opposite direction to the flow 50. In the exemplary embodiment, the cover section 33 is formed by a section of the frame 7.

[0102] The blockage covers the passage opening 74 in all embodiments when viewed in the direction of flow 50. In the embodiment according to Fig. 25 The covering section 33 completely covers the passage opening 74. In contrast to the closure element 76, the covering section 33 is spaced apart from the passage opening 74, and in particular from the fabric 70, especially with respect to the flow direction 50. In the exemplary embodiment shown, the blockage covers the passage opening 74. Fig. 25 hood-shaped.

[0103] The frame 7 has a frame thickness s1 measured in the direction of flow 50 in the area around the passage opening 74. The frame thickness s1 is measured adjacent to the cover section 33. The frame thickness s1 is measured adjacent to the passage opening 74, in particular adjacent to the edge of the passage opening 74. The cover section 33 has a cover thickness s2 measured in the direction of flow 50. The cover thickness s2 corresponds to the greatest extent of the cover area 33 in the direction of flow 50. In the exemplary embodiment, the cover thickness s2 is measured adjacent to the passage opening 74, in particular at the edge of the passage opening 74. The cover section 33 has a minimum cover thickness s3 measured in the direction of flow 50.The minimum covering thickness s3 corresponds to the smallest extent of the covering area 33 in the direction of the flow direction 50. The minimum covering thickness s3 is measured in particular above the passage opening 74, in the exemplary embodiment in the center of the passage opening 74.

[0104] The overlap thickness s2 is at most 50%, in particular at most 20%, in particular at most 5%, of the frame thickness s1.

[0105] The overlap thickness s2 is at least 1% of the frame thickness s1.

[0106] The coverage thickness s2 ranges from 0.01 mm to 5 mm, in particular from 0.05 mm to 2 mm.

[0107] The blockage is shown in the exemplary embodiment according to Fig. 25 formed from the material of frame 7.

[0108] The Fig. 24 and Fig. Figure 25 shows an alternative casting tool with a first tool half 71 and a second tool half 72. The alternative casting tool serves to manufacture the filter component 1 in an alternative design according to Fig. 25. The alternative casting tool comprises a first tool half 71, a second tool half 72 and at least one pin 73.

[0109] In the production of the alternative filter component 1, the fabric 70 is cast between the first mold half 71 and the second mold half 72 in a single casting step, forming the frame 7. At least one pin 73 is guided through the through-opening 74 during the casting step to hold the fabric 70 in position. The flow of cooling air through the filter component 1 in the direction of flow 50 is prevented in the area of ​​the through-opening 74 by the presence of a blockage. This blockage is formed by the frame 7 during the casting step.

[0110] During the casting process, material for the production of the frame 7 penetrates the area between the pin 73 and the alternative casting tool. At the beginning of the casting process, the pin 73 can be in contact with either the first tool half 71 or the second tool half 72 of the alternative casting tool. During the casting process, the pin 73 is moved away from the second tool half 72. In the exemplary embodiment, this occurs due to the pressure of the material used to produce the frame 7. Alternatively, the pin 73 can also be arranged at a distance from the second tool half 72. This distance can, in particular, already exist at the beginning of the casting process. In particular, the distance is constant during the casting process. Specifically, the distance is from 1 mm to 20 mm, more specifically from 1 mm to 10 mm, and more specifically from 1 mm to 3 mm. However, other values ​​for the distance can also be provided.The distance is measured particularly in the direction of flow 50.

[0111] The pin 73 is pre-tensioned towards the second tool half 72 with a clamping force, for example by means of a spring (not shown). The clamping force and the pressure with which the material for manufacturing the frame 7 is introduced during the casting process step are coordinated such that the pin 73 is moved away from the second tool half 72 by the material for manufacturing the frame 7 in the opposite direction to the clamping force during the casting process step. The material for manufacturing the frame 7 penetrates into the space between the second tool half 72 and the pin 73. Here, the blocking, in particular the overlapping section 33, is formed as shown in Fig. Figure 25 shows the opening 74 of the fabric 70. In particular, the opening 74 is not filled with material for the manufacture of the frame 7.

Claims

[1] Filter component for filtering cooling air for a hand-held work device (2), wherein the filter component (1) is designed to form part of an outer surface (3) of the work device (2) and to be attached to a base body (11) of the work device (2), wherein the filter component (1) comprises a guide element (110) for aligning the work device (2), in particular for aligning a tool (10) of the work device (2), characterized by , that the filter component (1) has a sealing element (77) for contact with the base body (11) of the hand-held working device (2) and for sealing between the filter component (1) and the base body (11), and that the gauging element (110) and the sealing element (77) are made of the same material. [2] Filter component according to claim 1, characterized by , that the gauging element (110) and the sealing element (77) are monolithically formed together as a gauging and sealing element (111). [3] Filter component according to claim 1 or 2, characterized by , that both the locating element (110) and the sealing element (77) are made of a thermoplastic elastomer. [4] Filter component according to one of claims 1 to 3, characterized by , that the filter component (1) has an inner side (14) facing the base body (11) in the installed position of the filter component (1) and an outer side (15) facing away from the base body (11) in the installed position of the filter component (1), that the filter component (1) has at least one flow opening (16), in particular at least two flow openings (16), and in particular four flow openings (16), that the at least one flow opening (16) completely penetrates the filter component from the inner side (14) to the outer side (15), and that the gauging and sealing element (111) extends through the at least one flow opening (16). [5] Filter component according to any one of claims 1 to 4, characterized by, that the filter component (1) has a frame (7), that the frame (7) has a channel (80) on the inside (14) of the filter component (1) for receiving the sealing element (77), and that the frame (7) has a gauging element channel (114) on the outside (15) of the filter component (1) for receiving the gauging element (110). [6] Filter component according to claims 4 and 5, characterized by , that the at least one flow opening (16) connects the channel (80) and the gauging element channel (114). [7] Filter component according to any one of claims 1 to 6, characterized by , that the frame (7) and the sighting element (110) contrast with each other in color. [8] Filter component according to any one of claims 1 to 7, characterized by , that the locating element (110) is arranged on the outside (15) of the filter component (1). [9] Hand-held work device comprising a filter component (1) according to any one of claims 1 to 8. [10] Hand-held work device with a filter component according to claim 8, characterized by , that the working device (2) comprises a tool (10), that the tool (10) has a longitudinal extent, that the sighting element (110) has a piercing bar (112) and / or a felling bar (113), and that the piercing bar (112) in the installed position extends substantially in the direction of the longitudinal extent and / or that the felling bar (113) extends in a direction transverse, in particular perpendicular, to the direction of the longitudinal extent. [11] Hand-held work tool according to claim 10, characterized by , that the cutting bar 112 and the felling bar 113 are arranged in such a way that they appear separated from each other by coverings. [12] Method for manufacturing a filter component for filtering cooling air for a hand-held work device (2), wherein the filter component (1) is provided to form part of an outer surface (3) of the work device (2) and to be attached to a base body (11) of the work device (2), wherein the filter component (1) comprises a guide element (110) for aligning the work device (2), in particular for aligning a tool (10) of the work device (2), characterized by , that the filter component (1) has a sealing element (77) for contact with the base body (11) of the hand-held working device (2) and for sealing between the filter component (1) and the base body (11), and that the gauging element (110) and the sealing element (77) are cast in a single casting process step and thereby form a gauging and sealing element (111), in particular a monolithic one.

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