Protective element for electric power tool

Abstract

The invention relates to a protective element, in particular a jacket, for a protective cover of a disc-shaped tool of an electric machine tool, in particular an angle grinder, having a protective element body which is reversibly fastened to the protective cover in an assembled position by tensioning the protective cover between a fastening element of the protective element body and a leaf spring. The invention further relates to a production method for the protective element and to an electric power tool having the protective element.

Description

Field of the Invention

[0001] The present invention relates to a protective element for a protective cover of a disc-shaped tool as an additional covering part for a power tool, in particular an angle grinder, wherein the protective element is configured to be reversibly and anti-loss connected to the protective cover and at least partially cover the tool. The present invention also relates to a method for manufacturing the protective element and a power tool provided with the protective element. Background Art

[0002] Most angle grinders are standardly equipped with a protective cover, which enables safe grinding using a disc-shaped grinding tool. However, if the tool is to be used for cutting by using not the flat side but the edge, it is important to supplement the protective cover with an additional element to protect the user. The standard IEC 62841-2-3 for angle grinders stipulates that the angle grinder must provide sufficient protection in the case of grinding and cutting. Therefore, it is common practice to provide an additional protective element for optional connection to the protective cover.

[0003] The protective cover generally consists of a circular-segment-shaped shielding element, which is arranged at the tool head of the power tool via a connecting section. The shielding element partially covers the disc-shaped tool in the rear axial direction, where the axial direction refers to the rotational axis of the disc-shaped tool, and the rear side direction is the side of the protective cover facing the tool. In addition to the flat protective surface, the shielding element also has a surrounding circumferential surface, which is also used to partially cover the tool in the radial direction. By means of the additional protective element, the power tool can be extended as required such that the tool is also partially covered in the front axial direction. This extension also effectively protects the user from axially accelerated material particles (such as sparks).

[0004] In order to enable the user to simply switch between the two functions of cutting and grinding, it is common to arrange the additional protective element at the shielding element without tools, for example by clamping. The standard IEC 62841-2-3 stipulates that for such tool-free fixation, the protective element must have a clear locking position and should not experience significant deterioration in terms of its state.

[0005] A tool-free fixable covering element for a protective cover is known from DE 10 2021 126 776 A1, which has a tensioning part configured as a spring element, the tension of which holds the covering element at the protective cover in the assembled position. The tensioning part is connected to the covering element by means of a rivet, and the fixing point of the covering element serving as a counter bearing is located at the lateral cantilever of the covering element. Such an arrangement is mechanically sensitive and relatively complex in terms of manufacturing. Summary of the Invention

[0006] The present invention is based on the following task of providing a protective element for a protective cover of a disc-shaped tool as an additional covering part for a power tool, in particular an angle grinder, wherein the protective element is designed to be reversibly connected to the protective cover in a simple, reliable and robust manner without the risk of loss.

[0007] This task is solved in particular by the protective element of claim 1. Preferred embodiments of the present invention are the subject matter of the dependent claims and are described below, in particular in conjunction with the embodiments shown in the figures.

[0008] The protective element according to the present invention is in particular constructed as a covering element for a protective cover of a disc-shaped tool of a power tool, in particular an angle grinder, wherein the protective element is designed to be reversibly connected to the protective cover without the risk of loss and to at least partially cover the tool. The protective element according to the present invention is in particular a jacket for the protective cover. The protective element according to the present invention comprises a protective element body, which has:

[0009] a first end,

[0010] a second end, wherein the second end is in particular opposite the first end along the central axis M of the protective element,

[0011] at least one fixing element, which is arranged at the first end and is designed to be reversibly connected to a protective cover edge of the protective cover when the protective element is assembled on the protective cover,

[0012] a receiving device for receiving a leaf spring, wherein the receiving device is arranged at the second end,

[0013] wherein the leaf spring is arranged in the receiving device and is designed such that the leaf spring is tensioned in the assembled position of the protective element on the protective cover, and the protective cover is clamped between the leaf spring and the at least one fixing element.

[0014] The protective element according to the present invention is in particular used to partially cover a disc-shaped tool, in particular a grinding and separating tool, a power tool, in particular an angle grinder. This covering is carried out in particular in the axial direction from the front side, wherein the protective element is in particular designed for retrofitting the power tool.

[0015] The protective element body preferably has a first wall (front side) and a rear wall opposite the first wall, wherein the first wall and the rear wall are preferably connected via an outer wall of the protective element body extending substantially parallel to the tool axis. In particular, the outer wall extends concentrically around the tool axis. The outer wall in particular has a receiving device for the leaf spring.

[0016] The first wall preferably has substantially the shape of an annular segment. The first wall is preferably substantially planar or almost perpendicular to the tool axis. The annular segment is preferably substantially a half of an annulus extending substantially perpendicular to the tool axis.

[0017] The rear wall substantially has the shape of an annular section and is preferably arranged almost perpendicular to the tool axis after assembly. In this context, it is particularly preferred that the first wall is inclined at an angle of up to 5° or 10° with respect to the rear wall, in particular with respect to a plane extending perpendicular to the tool axis. The annular section is preferably substantially a half of an annulus extending substantially perpendicular to the tool axis 50. In order to achieve a sufficient covering function, the first wall preferably extends further radially inwards in the direction of the tool axis than the rear wall.

[0018] The leaf spring is preferably a metal component, in particular made of high-quality steel. It is in particular an elongated component, in particular tab-shaped, in particular strip-shaped. In particular, the length of the leaf spring is many times greater than its height. This simple shape enables long-term reliable tensioning between the protective element and the protective cover. In addition, this shape also enables space-saving installation of the leaf spring.

[0019] Preferably, the leaf spring can be brought into a first position in which the leaf spring has a low tension, in particular no tension, in which position in particular the protective element is removed and spaced apart from the protective cover. Preferably, the leaf spring can be brought into an assembled position in which the protective element is reversibly tensioned against the protective cover in a non-losing manner via a tensioning force of in particular 50 N of the leaf spring (40).

[0020] The receiving device enables a simple and reliable connection of the leaf spring to the protective element body. In particular, due to the receiving device for this connection, no separate connecting element for connecting the leaf spring to the protective element body is required. The leaf spring engages in particular in two receiving portions of the protective element body. These receiving portions are in particular provided in the outer wall of the protective element body. These receiving portions are in particular opposite each other with respect to the central axis M of the protective element body. The central axis M extends in particular perpendicular to the tool axis.

[0021] The receiving device preferably has two (in particular with respect to the central axis (M) of the protective element body) opposite regions, where each region preferably has the following components:

[0022] A tensioning edge against which the leaf spring in the receiving device abuts,

[0023] A abutment section, where the distance A between the two abutment sections is less than the length of the leaf spring,

[0024] A transition edge, where the transition edge includes the transition of the receiving device, in particular the receiving portion, into the inner peripheral portion of the protective element body, in particular into the inner peripheral portion of the outer wall of the protective element body.

[0025] Preferably, the protective element body has a first wall and, opposite to and perpendicular to the first wall, a rear wall, wherein a free space 'F' is defined below the first wall in the direction of the rear wall, and the free space 'F' is configured to enable the assembly of the tool, in particular via tilting.

[0026] Preferably, the protective element body has a bulge, which is configured to surround the protective cover, in particular at a certain distance. The bulge extends radially inwards in the direction of the tool axis, in particular from the inner side of the protective element body. In particular, the bulge extends concentrically around the tool axis and extends concentrically with the outer wall of the protective cover in the assembled position.

[0027] Preferably, the first wall and the rear wall are arranged at an angle preferably less than 5°, or less than or equal to 3°.

[0028] Preferably, at least one fixing element is configured to achieve a form-fitting and / or force-fitting connection with the protective cover. Preferably, at least one fixing element is hook-shaped. Preferably, a number N>0 of fixing elements is provided, in particular N = 1 or preferably N = 2. It is also preferred that N = 3, 4, 5 or 6.

[0029] Preferably, the leaf spring is metallic. Preferably, the leaf spring comprises an austenitic material, in particular chromium-nickel steel 1.4310, or is made of this austenitic material. Thereby, high reliability is achieved.

[0030] Preferably, the tensioning or flexing of the leaf spring in the assembled position is performed such that the center point of the leaf spring is radially displaced outwards in the direction of the outer wall of the protective element body with respect to the tool axis.

[0031] Preferably, the material of the protective element or the material is selected from the group of thermoplastics, in particular polyamides, in particular glass fiber-reinforced thermoplastics.

[0032] Preferably, the protective element body is constructed in an integral structure, which is also referred to as "monolithic" here. In particular, the protective element body is an injection-molded part or a component manufactured by an additive manufacturing method.

[0033] Preferably, the leaf spring has a length between from 40 to 100 mm, preferably between 50 and 90 mm, preferably between 60 and 80 mm. In particular, the leaf spring has a height preferably between 5 and 30 mm, preferably between 8 and 20 mm, preferably between 10 and 15 mm. In a preferred embodiment, the leaf spring has dimensions of L×H×T = 70×12.7×1 mm, i.e., the thickness T = 1 mm. The thickness can in particular be between 0.3 mm and 3 mm.

[0034] In the assembled state of the protective element, the leaf spring inserted in the receiving device preferably has a deflection between 2 mm and 6 mm, particularly about 4.1 mm in a preferred embodiment. Here, the leaf spring abuts against the tension edge. This deflection is particularly determined as the maximum deflection of the leaf spring in the direction along the central axis of the protective element body, particularly through the center of the leaf spring.

[0035] Preferably, when the protective element is not assembled to the protective cover, the leaf spring inserted in the receiving device does not have a deflection. In the unassembled state of the protective element, the leaf spring is arranged in the receiving device freely, without tension and with a clearance.

[0036] The distance between the tension edge and the transition edge of the protective element measured in the direction parallel to the central axis M is

[0037] · about 4.7 mm, in the case of the protective cover for a tool disk with a diameter = 115 mm, or

[0038] · about 3.4 mm, in the case of the protective cover for a tool disk with a diameter = 125 mm, or

[0039] · about 2 mm, in the case of the protective cover for a tool disk with a diameter = 150 mm.

[0040] Particularly preferably, the distance between the tension edge and the transition edge measured in the direction parallel to the central axis M is determined such that the deflection of the leaf spring is constant in the case where the protective element is assembled, independent of the diameter of the tool disk and the protective element. Here, the deflection of the leaf spring is determined such that the required pull-out force according to the standard is satisfied. This distance depends on the diameter of the tool disk, the grinding device, and the spring characteristics of the leaf spring used. Starting from using leaf springs with the same parameters (length, width, thickness, spring characteristics) in the case of protective elements with different diameters, the larger the diameter of the tool disk, the smaller this distance. In other words, when using the same leaf spring, this distance increases as the diameters of the tool disk and the protective element decrease. It is known that the tool disk or the grinding device has diameters of 100 mm, 115 mm, 125 mm, 150 mm, 180 mm, and 230 mm. According to the present invention, this distance can be determined according to the diameter such that the deflection of the leaf spring and thus the generated tension is constant. This distance can be determined for each arbitrary diameter of the tool disk independent of the diameters mentioned above.

[0041] The present invention also relates to an angle grinder having a protective cover and a protective element according to the present invention that can be connected to the protective cover.

[0042] The present invention also relates to a method for manufacturing a protective element according to the present invention, which has the following steps:

[0043] Producing the protective element body by a method, for example by injection molding or additive manufacturing;

[0044] Insert the leaf spring into the receiving device of the protective element body. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Below, the present invention will be explained in more detail at a number of embodiments shown in the accompanying drawings;

[0046] in:

[0047] Figure 1a A perspective view of a protective element according to the invention is shown according to one embodiment.

[0048] Figure 1b Shown Figure 1a Details of the protection components.

[0049] Figure 2 Shown Figure 1a Detail of a cross-section of a protective element, viewed perpendicularly to the tool axis.

[0050] Figure 3 Shown Figure 2 Details of the view in .

[0051] Figure 4 Shown Figure 1a Cross-section of the protective element viewed perpendicular to the tool axis.

[0052] Figure 5 and Figure 6 A cross-sectional view, viewed perpendicularly to the tool axis, of a protective element according to the invention is shown in each case according to two further different exemplary embodiments.

[0053] Figure 4a Shown Figure 4 details.

[0054] Figure 5a Shown Figure 5 details.

[0055] Figure 6a Shown Figure 6 details.

[0056] Figure 7 The view taken parallel to the tool axis shows Figure 1a A perspective side view of a protective element to be fastened to the protective cover.

[0057] Figure 8 A view taken parallel to the tool axis shows Figure 1a A perspective side view of a protective element fastened to a protective hood and a grinding disc during its assembly on the spindle of an angle grinder.

[0058] Figure 9 shows a Figure 8 cross-sectional view of a protective element.

[0059] Figure 10 shows the protective element in a front view. Figure 1a of the protective element. DETAILED DESCRIPTION

[0060] Figure 1a shows a perspective view of a protective element 100 (also referred to as a jacket) according to the invention. The protective element has a protective element body 18. The protective element body has on its front side a wall 14 (pointing upwards in Figure 1a ), and an additional rear wall 16 (pointing downwards in Figure 1a ) opposite to this wall, wherein the wall 14 and the rear wall 16 are connected by an outer wall 17 extending substantially parallel to the tool axis 50.

[0061] The protective element 100 is implemented as a covering element in such a way that it has a wall 14 serving as a covering wall, by means of which a disk-shaped tool can be partially covered. The protective element 100 is designed to be connected safely and reversibly to the protective cover 30, and in this case covers at least a part of the disk-shaped tool, and thus protects the user or prevents the tool from having an undesired effect on the workpiece. The protective element body 18, which is part of the protective element 100, has a further specific structure: it has a section with a first end 10 and a section with a second end 20 opposite to the first end. Thus, the first end 10 is Figure 1a the open end shown in, and the second end 20 is the closed end of the protective element body 18 opposite to this open end, wherein the ends are opposite to each other in a radial direction M extending perpendicular to the tool axis 50.

[0062] Furthermore, the present embodiment of the protective element 100 shows a first functional complex having two fixing elements 11, which are arranged at the first end 10 of the protective element 100. These fixing elements 11 are designed to introduce a reversible connection to the protective cover edge 32 of the protective cover 30. By this design of the protective element 100, in combination with the second functional complex, reliable fixation and covering of the tool by means of the protective element 100 and the protective cover 30 are ensured.

[0063] Figure 1b shows the fixation of the protective element 100 according to the invention at the protective cover 30. The first functional complex is shown enlarged, which is located at the first end 10 of the protective element 100, correspondingly at the protective cover edge 32, and has a plurality of fixing elements 11, in Figure 1bOne of them is shown. In the illustrated embodiment, these fixing elements 11 are structurally seamlessly, in particular monolithically, connected to the protection element body 18 and are here configured as projections of the edge 13 of the protection element body 18 that points in the direction of the first end 10. The arrangement and shape of the fixing elements 11 cause the inner side of the rear wall 16 of the protection element body 18 to be able to abut against the outer side of the protective cover 30 in a touching contact manner.

[0064] The fixing element 11 serves as a support. In particular, the fixing element is a hook-shaped element that here has an opening 12 pointing in the direction of the protection element body 18. The protection element 100 preferably has two fixing elements 11. Alternatively, however, it can also preferably be provided with exactly one fixing element 11 or more than two fixing elements 11.

[0065] In the illustrated embodiment, the fixing element 11 is designed with an opening 12 having a U-shaped or V-shaped design. In the assembled state, each fixing element 11 surrounds the protective cover 30 at the protective cover edge 32 of the protective cover and is tensioned in the direction of the protective cover 30 by means of the second functional complex.

[0066] Thereby, a force-fit and form-fit connection is established between the protective cover 30 and the protection element 100 by means of the first and second functional complexes.

[0067] The shown opening 12 serves for the purpose of facilitating the effortless and safe assembly of the protection element 100 in such a way that the opening enables easy placement at the protective cover 30 or its protective cover edge 32. In the illustrated embodiment, each individual fixing element 11 has a specific length of approximately 15 cm (measured along the protective cover edge 32), thereby ensuring the optimal fixation of the protection element 100. In addition, as Figure 2 shown, the fixing element 11 is deliberately placed away from the tool axis 50 in order to ensure a stable and reliable fixation. This particularly means that the fixing element is positioned closer to the outer periphery of the protection element 100 compared to the center of the protection element 100 (through which the tool axis 50 passes in the assembled position). This positioning contributes to increasing the structural strength of the protection element 100 in the assembled position in such a way that the positioning enables a durable connection with the protective cover 30.

[0068] In Figure 2It can be seen that the second functional complex for fixing the protective element 100 to the protective cover 30 is located at the end of the protective element 100 opposite to the first end 10, i.e., the second end 20. This second functional complex includes a receiving device 21 configured to receive the leaf spring 40, and this receiving device is specifically designed for the installation and functionality of the leaf spring 40. Here, the receiving device 21 includes two tension edges 22 and abutment sections 23 that are opposite to each other with respect to the central axis M of the protective element 100, and they are used for the correct assembly and reliable insertion of the assembled outer sleeve.

[0069] Here, the L-shaped abutment sections 23 (wherein in the illustrated embodiment, the L-shape is shown inverted in the upper region) are respectively placed in alignment with the tool axis 50. The distance A between the outermost edges 26 of the abutment sections 23 that are vertically opposite to each other in the direction of the central axis M of the outer sleeve is smaller than the length of the leaf spring 40 inserted into the receiving device 21. The distance X between the inner edges 27 of the abutment sections 23 that are vertically opposite to each other in the direction of the central axis M of the outer sleeve is greater than the length of the leaf spring 40 inserted into the receiving device 21. This configuration ensures that the leaf spring 40 can be reliably and losslessly inserted into the receiving device 21 in such a way that the leaf spring achieves reliable locking and firm fitting.

[0070] The leaf spring 40 is strip-shaped and has a maximum dimension extending along its longitudinal direction. In the illustrated embodiment, the dimensions of the leaf spring 40 are 70×12.7×1 mm. The dimensions of the distances A and X and the length of the leaf spring 40 are determined such that the leaf spring 40 can be inserted into the receiving device 21 with a clearance (i.e., loosely). When inserting the leaf spring 40, the leaf spring is bent to such an extent that its length is slightly shorter than the distance A so that the leaf spring 40 can be inserted into the receiving device 21. In the assembled state, when the protective element 100 is fixed to the protective cover 30, the tension edges 22 form the abutment points for the leaf spring 40.

[0071] Figure 3 The transition edge 24 of the receiving device 21 to the inner peripheral portion of the protective element 100 is shown. This illustration shows the area where the receiving device 21 transitions to the inner peripheral portion D of the protective element 100. The transition area formed by the transition edge 24 marks the section where the structural elements of the receiving device 21 transition to the inner area of the protective element 100 to ensure a continuous and fluid connection that holds the leaf spring 40 as part of the second functional complex.

[0072] Figure 4An exemplary structural component dimension for meeting the pull-out force is shown, which is achieved here by a specific deflection of 4.1 mm for the leaf spring 40 made of material 1.4310 used. The material 1.4310 of the metal leaf spring 40 is here a chromium-nickel steel with an austenitic structure, which is known as a classic stainless spring steel due to its good formability and hardness.

[0073] The set deflection of the leaf spring 40 is carried out in the assembled position such that the center point of the leaf spring is radially displaced outward in the direction of the outer wall (17) of the protective element body (18) with respect to the tool axis (50). In particular, the deflection is carried out such that the leaf spring 40 bends on the side facing the tool axis 50 from the circumferential surface of the protective cover 30 in the direction of the tension edge 22. Accordingly, the positioning of the second functional group is determined to ensure a specific deflection of the 4.1-mm leaf spring 40. This deflection is set to achieve the desired pull-out force according to preset requirements.

[0074] The diameters of the market-dominant grinding devices are 115, 125, and 150 mm. In addition, other diameters of grinding devices are also known, such as 100 mm, 180 mm, and 230 mm. Since the inner diameter of the protective element 100 basically corresponds to the outer diameter of the corresponding protective cover 30, and this diameter or radius affects the deflection of the leaf spring 40, the second functional complex is arranged according to the corresponding diameter.

[0075] As Figure 4 and Figure 4a shown, in the case of the protective cover 30 for a tool disk with a diameter of 115 mm, the distance s from the tension edge 22 to the transition edge 24 is approximately s = 4.7 mm. This dimensional description describes the specific distance between the tension edge 22 and the transition region 24 measured in the direction parallel to the central axis M at the protective cover 30 with a fixed length of 115 mm.

[0076] Regarding Figure 5 and Figure 5a the protective element 200, in the case of the protective cover 30' for a tool disk with a diameter of 125 mm, the distance s between the tension edge 22 and the transition region 24 is approximately s = 3.4 mm. This description describes the distance between the tension edge 22 and the transition region 24 measured in the direction parallel to the central axis M at the protective cover 30' with a fixed length of 125 mm.

[0077] For Figure 6 and Figure 6aThe protective element 300, along the protective cover 30 for a tool disk with a diameter of 150 mm, the distance s between the tensioning edge 22 and the transition region 24 is approximately s = 2 mm. This description refers to the distance measured in the direction parallel to the central axis M at the protective cover 30 designed for a grinding device with a diameter of 150 mm between the tensioning edge 22 and the transition region 24.

[0078] As can be seen, as the diameter of the protective cover increases, the tensioning edge 22 is positioned closer to the tool axis 50. These different arrangements are intended to achieve the required deflection of the leaf spring 40 of 4.1 mm when the diameter of the protective cover 30 changes. Thereby generating the necessary tensioning force to ensure the required pull-out force of 50 N according to the standard (DIN EN IEC 62841-2-3 (VDE 0740-2-3): 2022-07, especially Appendix AA), and this is independent of the diameter of the protective cover 30 or the grinding disk.

[0079] The regulations regarding the replacement of the grinding disk when assembling the protective element 100 require that the height of the protective element 100 be greater than the height of the protective cover 30.

[0080] Figure 7 A cross-section through the protective element 100 arranged above the assembled protective cover 30 is shown. It can be seen that the protective element 100 has a free space F, which in the illustrated embodiment is arranged above the protective cover 30.

[0081] In Figure 8 it becomes clear that the free space marked 'F' of the assembled protective element 100 can be used for assembling the grinding disk 30 or a similar tool. The grinding disk can be introduced at an angle and fixed to the protective cover 30, onto the shaft of the machine tool, using the free space F. This is possible when the protective element 100 is assembled due to the free space F.

[0082] To further facilitate the assembly of the protective element 100, the wall 14 of the protective element 100 that serves as the covering wall 14 (which covers the grinding disk in the axially outward direction) is arranged at an angle of approximately 3 degrees together with the free space 'F' in the illustrated embodiment.

[0083] In Figure 9In the illustrated embodiment, at the protective element 100, there is a bulge 15 which serves to hold the protective element 100 stable during the operation of the angle grinder by form fit. The bulge 15 is placed at the height of the center line of the protective element 100 and is at a distance from the rear wall 16 of the protective element 100. The bulge 15 is dimensioned such that the protective element 100 is arranged in a fixed position during the operation of the machine tool. In addition, the bulge 15 and the rear wall 16 are also arranged at an angle of approximately 3 degrees in order to ensure that the assembly of the protective element 100 and the grinding disc 30 is not affected by the bulge 15. The first wall 14 (covering wall) is opposite to the rear wall 16. The two walls 14 and 16 have a slight inclination with respect to a plane that is completely perpendicular to the tool axis 50, wherein the wall 14 is inclined more strongly than the rear wall 16. Thus, the two walls 14 and 16 only extend substantially perpendicular to the tool axis 50.

[0084] The rear wall 16 and the second wall 14 are monolithically connected via the outer wall 17. A bulge 15 extending in the circumferential direction around the tool axis 50 is provided in the transition region between the wall 14 and the outer wall 17. The outer wall 17 extends parallel to the tool axis 50. The protective element body 18 is in particular an injection-molded part. The first wall 16 is shaped such that it abuts against the outer wall of the protective cover 30 in a planar manner in the assembly position of the protective element 100, wherein this outer wall extends almost perpendicular to the tool axis.

[0085] Figure 10 The rear wall 16 and the wall 14 of the protective element 100 connected via the outer wall 17 are shown in a rear view. The outer wall 17 extending concentrically in the circumferential direction around the tool axis 50 has a receiving device 21 for the leaf spring 40. The rear wall 16 substantially has the shape of an annular segment and is here substantially planar or almost perpendicular to the tool axis 50. This annular segment is here substantially half of a ring. The wall 14 (front side) also substantially has the shape of an annular segment and is here almost perpendicular to the tool axis 50. This annular segment is here substantially half of a ring. In order to achieve a sufficient covering function, the wall 14 extends further radially inwards than the rear wall 16 in the direction of the tool axis 50. Thereby, the maximum possible protection of the tool disc can be achieved.

[0086] List of reference numerals

[0087] 100 Protective element

[0088] 10 First end

[0089] 11 Fixing element

[0090] 12 Opening

[0091] 13 Edge

[0092] 14 Wall

[0093] 15 bulge

[0094] 16 posterior wall

[0095] 17 outer wall

[0096] 18 Protective element body

[0097] 20 Second End

[0098] 21 Receiving device

[0099] 22 Tensioning edge

[0100] 23 Snap Section

[0101] 24 Transition edge

[0102] 26 outer edge

[0103] 27 inner edge

[0104] 30 protective cover

[0105] 32 Protective cover edge

[0106] 40 leaf spring

[0107] 50 Tool axis

[0108] A Distance

[0109] D Inner periphery

[0110] F Free Space

[0111] M radial direction

[0112] X distance

Claims

1. A protective element (100), in particular a jacket, for a protective cover (30) of a disc-shaped tool for a power tool, in particular an angle grinder, wherein, The protective element is configured to be releasably and reversibly connected to the protective cover (30) and at least partially cover the tool in a non-losing manner. The protective element has a protective element body (18), which has: a first end (10), a second end (20), wherein the second end (20) is opposite to the first end (10), at least one fixing element (11), which is arranged at the first end (10) and is configured to be reversibly connected to the protective cover edge (32) of the protective cover (30) when the protective element (100) is assembled to the protective cover (30). a receiving device (21) for receiving the leaf spring (40), wherein the receiving device (21) is arranged at the second end (20). wherein the leaf spring (40) is arranged in the receiving device (21) and is configured such that the leaf spring is tensioned in the assembled position of the protective element (100) at the protective cover (30), and the protective cover (30) is clamped between the leaf spring (40) and the at least one fixing element (11). wherein the receiving device (21) includes two regions opposite to each other with respect to the central axis (M) of the protective element body (18), and each region has the following parts: a tensioning edge (22), wherein the leaf spring (40) in the receiving device abuts against the tensioning edge (22) when the protective element is assembled. a abutting section (23), wherein the distance A between the two abutting sections (23) is less than the length of the leaf spring (40). a transition edge (24), wherein the transition edge (24) includes the transition of the receiving device (21) into the inner periphery of the protective element body (18), in particular into the inner periphery of the outer wall (17) of the protective element body (18).

2. The protective element (100) according to claim 1, Among them, the leaf spring (40) can be brought to a first position, in which the leaf spring (40) has low tension, in particular no tension, in which the protective element (100) is disassembled and spaced apart from the protective cover (30), and [[ID=1 ​ Among them, ​ ​ ​ Among them, ​ 5. The protective element (100) according to any one of claims 3 or 4, Among them, The wall (14) is arranged at an angle to the rear wall (16), preferably 3°.

6. The protective element (100) according to any one of the preceding claims, Among them, The fixing element (11) enables a form-fitting and / or force-fitting connection with the protective cover and is in particular constructed in a hook-like manner.

7. The protective element (100) according to any one of the preceding claims, Among them, The leaf spring (40) is metallic and in particular comprises an austenitic material, in particular chromium-nickel steel 1.4310.

8. The protective element (100) according to any one of the preceding claims, Among them, The deflection of the leaf spring (40) takes place in such a way in the assembled position that the center point of the leaf spring is displaced radially outwards in the direction of the outer wall (17) of the protective element body (18) with respect to the tool axis (50).

9. The protective element (100) according to any one of the preceding claims, Among them, The material of the protective element (100) is selected from the group of thermoplastics, in particular polyamides, in particular glass fiber-reinforced thermoplastics.

10. The protective element (100) according to any one of the preceding claims, Among them, The protective element body (18) is constructed as a single piece.

11. The protective element (100) according to any one of the preceding claims, Among them, The leaf spring is an elongated part which has a length which is many times greater than the maximum height of the component, in particular a length between 40 and 100 mm, preferably between 60 and 80 mm.

12. The protection element (100) according to claim 11, wherein, When the protective element is assembled at the protective cover (30), the leaf spring (40) has a deflection, in particular a deflection between 2 and 6 mm, in particular a deflection of 4.1 mm.

13. An electric power tool, in particular an angle grinder, having a protective element (100) according to any one of claims 1 to 12.

14. A method for manufacturing a protective element according to any one of claims 1 to 12, having the following steps: · Generating the protective element body (18) in particular by an injection molding method; · Inserting the leaf spring (40) into the receiving device (21) of the protective element body.

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