Blind rivet element for establishing a threaded connection in a component

Abstract

The invention relates to a blind rivet element (1). The blind rivet element (1) has a head section (2) and a shaft (3) adjoining the head section (2) in an axial direction (Z), wherein the shaft (3) has an internal thread or a connection section for a threaded bolt and has a deformation section between the internal thread or the connection section for a threaded bolt and the head section (2) in order to form a closed head upon deformation of the deformation section. The head section (2) has a radially outer region, wherein the radially outer region is configured spaced apart from the shaft (3) in a radial direction, wherein the head section (2) has at least one first protrusion (7) projecting in the axial direction (Z), wherein the at least one first protrusion (7) is configured only in the radially outer region of the head section (2), and / or wherein the head section (2) has at least one second protrusion (8) projecting counter to the axial direction (Z), wherein the at least one second protrusion (8) is configured only in the radially outer region of the head section (2).

Description

Technical Field

[0001] The present invention relates to a blind rivet element, and more particularly to a blind rivet element for establishing a threaded connection in a component. Background Technology

[0002] Blind rivet elements have proven suitable for fastening tasks where threaded connections are required in areas of thin-walled materials such as sheet metal, where it is typically impossible to cut threads into these materials. A blind rivet element is known, for example, from EP 1 918 596 A1.

[0003] The problem with such blind rivet elements or threaded connections established using such blind rivet elements is that the blind rivet or threaded connection does not have sufficient torsional resistance, thus causing the blind rivet element to twist relative to the component into which it is introduced when the threaded connection is intentionally tightened or loosened. This poses the danger of not being able to tighten or loosen the threaded connection securely enough. Furthermore, rotating the blind rivet element may damage the component or surrounding components. Summary of the Invention

[0004] The objective of this invention is to provide a blind rivet element that ensures particularly high torsional resistance and is also suitable for penetrating the surface of the component to which the blind rivet element is connected, particularly penetrating coatings applied to the component, such as plastic coatings or paint layers, in order to establish electrical contact, especially between the blind rivet element and the component.

[0005] This task is solved by a blind rivet element having the features of the present invention. The blind rivet according to the invention has a head section and a shank axially abutting the head section. The head section preferably has a larger diameter than the shank. The shank has an internal thread or a connecting section for a threaded bolt and a deformable section between the internal thread or connecting section for a threaded bolt and the head section. The deformable section is used to construct a locking head when the deformable section deforms. The head section has a radially outer region, wherein the radially outer region is constructed radially spaced from the shank. The head section has at least one first protrusion projecting axially, wherein the at least one first protrusion is constructed only in the radially outer region of the head section, and / or the head section has at least one second protrusion projecting in the opposite axial direction, wherein the at least one second protrusion is constructed only in the radially outer region of the head section.

[0006] The advantage of constructing the first or second protrusion in the radially outer region is that the torque acting on the blind rivet element is particularly well transferred from the blind rivet element to the member contacting the protrusion, thus the blind rivet element has particularly high torsional resistance.

[0007] Furthermore, it has proven advantageous to construct the protrusions in the radially outer region, where the tolerances of the through-hole into which the blind rivet element is inserted and subsequently placed, as well as the tolerances during placement of the blind rivet element, have only a minor impact on the proper insertion of the protrusion into the corresponding component, since the protrusion is sufficiently spaced from the placement hole / through-hole. Conversely, the danger of protrusions in the radially inner region is that a portion of these protrusions may not be inserted into the corresponding component, but rather, after the placement of the blind rivet element, the protrusion is at least partially positioned in the through-hole / placement hole and therefore cannot or only slightly contributes to the torsional resistance of the blind rivet element. Furthermore, an increased risk with protrusions in the radially inner region is the tendency of the blind rivet element to tilt when inserted into the placement hole, resulting in the axial direction of the blind rivet element and the axial direction of the placement hole being tilted relative to each other. This is detrimental to the threaded connection formed by the blind rivet element, which in this case does not have the desired angular orientation.

[0008] Especially when there are protrusions projecting in the opposite axial direction, and thus protrusions constructed on the side of the head section opposite to the rod, the advantage of constructing these protrusions in the radially outer region is that the protrusions are arranged outside the area that typically contacts the placement tool used when placing the blind rivet element. This avoids obstructing the placement of the blind rivet tool and also avoids undesirable deformation of the protrusions during the placement process.

[0009] A blind rivet element can be configured as a blind rivet nut as long as it has internal threads in the region of the shank. As long as the blind rivet element has internal threads, the fastener having a blind rivet element in the form of a blind rivet nut can be connected to the component in the following way: first, the fastener is placed in a pre-drilled hole or pre-drilled receiving opening in the component and then riveted with a suitable tool, typically having a rotatable and axially movable threaded mandrel. For this purpose, the threaded mandrel is screwed into the internal threads of the blind rivet nut from the head section side and then moved axially such that the deformed section is compressed, thus creating a mating flange, i.e., a locking head, between the threaded starting end and the bottom side of the component. The locking head and the head section of the blind rivet nut arranged on the upper side of the component together anchor the blind rivet nut and therefore the fastener in the component. The threaded mandrel is then unscrewed. The blind rivet nut can then be used as a receiver for a fastening screw. If a blind rivet element is constructed as a blind rivet threaded bolt, then the shank has a receiving portion for the threaded bolt, to which the threaded bolt is typically welded or pressed. The connection between the fastener and the blind rivet threaded bolt corresponds to the connection between the fastener and the blind rivet nut, the difference being that it is pulled directly at the threaded bolt.

[0010] The presence of at least one first protrusion and / or at least one second protrusion facilitates the formation of electrical contact between the blind rivet element and the component in contact with the corresponding protrusion, since the corresponding protrusion is particularly well suited to penetrating a coating, such as a plastic coating or paint layer, applied to a conductive material of the component, and thus directly contacting the conductive material of the component.

[0011] Blind rivet components are preferably made of conductive materials or conductive materials, such as metals or metal alloys.

[0012] It is entirely conceivable that at least one first protrusion and / or at least one second protrusion are configured as a surrounding protrusion.

[0013] The blind rivet element preferably has multiple first protrusions and / or multiple second protrusions.

[0014] The plurality of first protrusions and / or the plurality of second protrusions are arranged particularly tangentially spaced and / or preferably circumferentially. It is particularly advantageous here that the plurality of first protrusions and / or the plurality of second protrusions are arranged rotationally symmetrically, wherein the count is greater than 1. It is particularly advantageous in this respect that the count is consistent with the number of first protrusions or the number of second protrusions.

[0015] The plurality of first protrusions and / or the plurality of second protrusions are preferably arranged along the annulus.

[0016] In a particularly preferred embodiment, the radially inner region of the head segment does not have a protrusion.

[0017] An advantage in terms of particularly high torsional resistance is that the radial distance between the corresponding first or second protrusion and the rod is at least 50% of the radial distance between the outer edge of the head section and the rod. The aforementioned ratio is preferably at least 60%, and especially at least 75%.

[0018] It is considered particularly advantageous that at least one first protrusion and / or at least one second protrusion are constructed at the outer edge of the head segment.

[0019] In a particularly preferred embodiment, the blind rivet element is constructed such that, in its axial projection, the head section has a notch adjacent to at least one first protrusion and / or an notch adjacent to at least one second protrusion. This creates a free space tangentially adjacent to the first or second protrusion. This design has proven advantageous in terms of particularly high torsional resistance. This free space can be used, in particular, to accommodate material of components extruded during placement of the blind rivet element due to the penetration of the first protrusion, either the component into which the blind rivet element is introduced, or the component that contacts the head section on the side opposite to the shank during connection. This allows the corresponding protrusion to penetrate deeper into the corresponding component. Because the free space is further filled with the extruded material, torsional resistance is further improved.

[0020] Regarding the vacancy, it is considered advantageous that, in the axial direction of view, the corresponding vacancy is clockwise adjacent to at least one first protrusion, and / or, in the axial direction of view, the corresponding vacancy is clockwise adjacent to at least one second protrusion.

[0021] This symmetrical design has proven to be particularly advantageous in terms of torsional resistance.

[0022] Furthermore, it is considered advantageous that, in the axial direction of view, the head section does not have a gap when counterclockwise adjacent to at least one first protrusion, and / or, in the axial direction of view, the head section does not have a gap when counterclockwise adjacent to at least one second protrusion. In this design, the protrusions are particularly well suited for absorbing torsional forces because the protrusions can be tangentially supported on the remaining head sections, or the head sections can particularly well absorb forces acting tangentially on the protrusions.

[0023] In another embodiment of the blind rivet element, in the axial view, a corresponding gap is counterclockwise abutted against at least one first protrusion, and / or in the axial view, a corresponding gap is counterclockwise abutted against at least one second protrusion. Refer to the above explanation for advantages.

[0024] In this embodiment, it is considered particularly advantageous that, in the axial viewing direction, the head segment does not have a gap when clockwise adjacent to at least one first protrusion, and / or, in the axial viewing direction, the head segment does not have a gap when clockwise adjacent to at least one second protrusion. Refer to the above explanation for advantages.

[0025] At least one first protrusion and / or at least one second protrusion are preferably formed by partial reshaping of a region of the head segment, for example by stamping or bending a portion of the head segment.

[0026] In terms of particularly good and simple insertion of the first or second protrusion into the corresponding component, it has proven advantageous that at least one first protrusion and / or at least one second protrusion have a cut edge and / or a tip. The cut edge or tip is constructed at the free end of the protrusion.

[0027] It has proven advantageous that the cutting edge extends substantially in the radial direction. "Substantially" is currently understood to mean that the cutting edge is oriented at an angle between 0° and 10° relative to the radial direction.

[0028] In an advantageous improvement, at least one first protrusion and / or at least one second protrusion have a first cutting surface and a second cutting surface inclined relative to the first cutting surface, wherein the contact line of the cutting surfaces forms the cutting edge of the respective protrusion. The angle enclosed by the cutting surfaces is preferably between 80° and 120°.

[0029] Blind rivet elements are preferably constructed as a single piece.

[0030] Blind rivet components are preferably made of metal or metal alloy.

[0031] It has proven particularly advantageous that the first cut surface forms a first angle with a plane perpendicular to the axial direction, and the second cut surface forms a second angle with this plane, wherein the value of the second angle is less than the value of the first angle. The first angle and / or the second angle is preferably less than 90°. The second cut surface preferably faces the notch. When tightening the threaded connection formed by the blind rivet element and when disengaging the threaded connection formed by the blind rivet element, surfaces with substantially different inclinations are subjected to loads. The blind rivet element is thus constructed asymmetrically. This asymmetrical design has proven particularly advantageous. In this design, the maximum torque that the blind rivet element can absorb when tightening and disengaging the threaded connection is typically different. This, for example, ensures that the formed threaded connection can also be disengaged again, i.e., by designing the blind rivet element such that the maximum torque that the blind rivet element can absorb when tightening the threaded connection is less than the maximum torque that the blind rivet element can absorb when disengaging the threaded connection.

[0032] It is considered particularly advantageous that the blind rivet element has a plurality of first protrusions and / or a plurality of second protrusions, wherein all of the plurality of first protrusions and / or all of the plurality of second protrusions are constructed around an axis constructed in the axial direction, and the blind rivet element preferably has a plurality of first protrusions and a plurality of second protrusions, wherein the plurality of first protrusions and the plurality of second protrusions are constructed alternately in the circumferential direction.

[0033] The blind rivet element preferably has at least three first protrusions and three second protrusions, and more preferably at least four first protrusions and at least four second protrusions.

[0034] It is considered particularly advantageous that the head segment has a greater axial extension in the region of the first protrusion and / or the region of the second protrusion than in the adjacent region of the head segment. In this respect, the head segment is elevated in its thickness in the region of the respective protrusion, thereby preventing the protrusions from deforming axially, and in particular from being squeezed together, when axial loading is applied to the protrusions.

[0035] The head section can have an elliptical, especially circular, cross-section. However, the head section can also have an angular, especially quadrilateral or hexagonal, cross-section. The head section can have a semi-hexagonal or hexagonal cross-section. The head section, especially in its radially outward regions, can be constructed to be very thick or very thin along the axial direction. The head section is preferably constructed as a countersunk head.

[0036] The rod or at least a portion thereof may have an elliptical, particularly circular, cross-section. However, the rod or at least a portion thereof may also have an angular, particularly quadrilateral, or hexagonal cross-section. The rod or at least a portion thereof may, in particular, have a semi-hexagonal or hexagonal cross-section.

[0037] The rod and / or head section preferably has knurling, especially on the radially outer side. Attached Figure Description

[0038] The invention will be explained in more detail with the aid of embodiments in the following figures, but without limiting the invention.

[0039] in: Figure 1 Press Figure 2 The first embodiment of the blind rivet element is shown in the view indicated by arrow I; Figure 2 Press Figure 1 The blind rivet element is shown in the view of arrow II; Figure 3 Press Figure 2 The blind rivet element is shown in the partial sectional view of line III-III; Figure 4 according to Figure 3 Circle IV shows a portion of the blind rivet element; Figure 5 according to Figure 3 The arrow V indicates a blind rivet element; Figure 6 Another implementation of the blind rivet element is shown in the side view; Figure 7 It shows the press Figure 6 Partial area of ​​the blind rivet component; Figure 8 Another implementation of the blind rivet element is shown in the side view; Figure 9 Another implementation of the blind rivet element is shown in the side view; Figure 10 The partial cross-sectional view shows the arrangement of... Figure 9 Blind rivet components; Figure 11 Another implementation of the blind rivet element in the deformed state of the deformed section is shown; Figure 12 Another implementation of the blind rivet element is shown in the side view; Figure 13 The sectional view shows the press Figure 12 Blind rivet components. Detailed Implementation

[0040] Figures 1 to 5 A first embodiment of the blind rivet element 1 is shown. The blind rivet element 1 has a head section 2 and a rod 3 abutting the head section 2 in the axial direction Z. The rod 3 is currently constructed as a partially hexagon, wherein the rod 3 has a cross-section that narrows in the axial direction Z at its end opposite to the head section 2. This facilitates the insertion of the blind rivet element 1 into the placement hole by pushing it forward with the rod 3.

[0041] The rod 3 has an internal thread 4 and a deformable section 5 between the internal thread 4 and the head section 2, wherein the deformable section 5 is currently formed by a weak material structure, i.e., the wall thickness of the rod 3 is smaller in the region of the deformable section 5. This is particularly due to Figure 3 It is known that the deformation section 5 is used to construct the locking head 6 during deformation of the deformation section 5. The connection of the blind rivet element 1 to another component is typically carried out in such a way that the blind rivet element 1 is first placed in a pre-made hole or a pre-made receiving opening, and then, using a suitable tool, the blind rivet element 1 is deformed in the area of ​​the deformation section 5 to form the locking head 6 on the side of the component opposite to the head section 2, thereby being riveted into the component. The tool used typically has a rotatable and axially movable threaded mandrel. The threaded mandrel is screwed into the internal thread 4 of the blind rivet element 1, which is configured as a blind rivet nut, from the head section side and then moved axially such that the deformation section 5 is compressed and thus a mating flange in the form of the locking head 6 is constructed between the thread start end of the internal thread 4 and the bottom side of the component. The locking head 6, together with the head section 2 arranged on the upper side of the component, anchors the blind rivet element 1 in the component. The threaded mandrel holding the tool is then unscrewed. The internal thread 4 of the blind rivet element 1 can then be used as a housing for fastening devices, such as screws.

[0042] The head section 2 of the blind rivet element 1 has a radially outer region 15, wherein the radially outer region 15 is constructed radially spaced from the rod 3. A radially inner region 16 of the head section 2 is constructed between the radially outer region 15 and the rod 3 of the blind rivet element 1. The radially outer region 15 and the radially inner region 16 are located within... Figure 5 As can be seen from the dotted line, the dotted line separates the inner region 14 from the outer region 15.

[0043] The head segment 2 has three first protrusions 7 protruding along the axial direction Z and three second protrusions 8 protruding in the opposite axial direction Z, wherein the first protrusions 7 and the second protrusions 8 are only constructed in the radially outer region 15 of the head segment 2. Conversely, the radially inner region 16 of the head segment 2 does not have any protrusions.

[0044] The first protrusion 7 and the second protrusion 8 are currently constructed at the outer edge of the head section 2. The radial distance between the respective protrusions 7, 8 and the rod 3 is at least 60% of the radial distance between the outer edge of the head section 2 and the rod 3.

[0045] The first and second protrusions 7, 8 are arranged around the axis of the blind rivet element 1 in the axial direction Z, wherein the arrangement is currently rotationally symmetric, and the count n is the same as the number of the first or second protrusions 7, 8, so the current count n = 3.

[0046] In the projection along the axial direction Z, the head segment 2 has a gap 12 adjacent to the corresponding first protrusion 7 and the corresponding second protrusion 8. The corresponding gap 12 is adjacent to the corresponding first protrusion 7 or the corresponding second protrusion 8 counterclockwise. In the other direction, i.e. clockwise, the head segment 2 does not have a gap adjacent to the corresponding first protrusion 7 or the corresponding second protrusion 8.

[0047] The corresponding notch 12 has the advantage that material extruded during the insertion of the blind rivet element 1 into the placement hole of the component and / or during the tightening of another component to the first component by means of the blind rivet element 1 can be accommodated in this notch area. By making the head section 2 without notches in other directions, the corresponding protrusions 7, 8 are supported tangentially by the unnotch portion of the head section 2.

[0048] Such as especially by Figure 2 and 5 As can be seen, this design structure of the head section results in a saw blade-like outer contour of the head section 2 when viewed downwards along the axial direction Z.

[0049] Currently, the corresponding first protrusion 7 and the corresponding second protrusion 8 have protruding cut edges 9, wherein the cut edges 9 extend substantially in the radial direction. The cut edges 9 of the corresponding protrusions 7 and 8 are thus formed such that the corresponding protrusions 7 and 8 have a first cut surface 10 and a second cut surface 11 inclined relative to the first cut surface 10, wherein the contact line of the cut surfaces 10 and 11 forms the cut edges 9 of the corresponding protrusions 7 and 8.

[0050] The first cutting surface 10 forms a first angle α with a plane perpendicular to the axial direction Z, and the second cutting surface 11 forms a second angle β with this plane, wherein the value of the second angle β is less than the value of the first angle α. The second cutting surface 11 faces the notch 12. The angle γ formed by the cutting surfaces is preferably between 80° and 120°. Angles α and β are preferably less than 90° respectively.

[0051] The three first protrusions 7 and the three second protrusions 8 are currently constructed alternately along the circumferential direction. Thus, along the circumferential direction, the second protrusion 7 follows the first protrusion 8 and the first protrusion 8 follows the second protrusion 7.

[0052] The corresponding first protrusion 7 and the corresponding second protrusion 8 are currently formed by partial reshaping of the area of ​​the head section 4, wherein a portion of the head section 4 is currently cut in and then bent to form the corresponding protrusion 8.

[0053] Especially by Figure 1 , Figure 3 and Figure 4 As can be seen from the view, the head section 2 has a greater extension length in the axial direction Z in the region of the corresponding first protrusion 7 and in the region of the corresponding second protrusion 8 than in the region adjacent to the head section 4. In this respect, the corresponding protrusions 7 and 8 are constructed such that the head section 2 has increased material thickness in the corresponding regions of the protrusions 7 and 8. The advantage of this is that when the blind rivet element 1 is introduced into the component or when connecting other components by means of the blind rivet element 1, the region of the head section 2 opposite to the corresponding protrusions 7 and 8 in the axial direction Z or opposite to the axial direction Z prevents deformation of the protrusions 7 and 8 in the axial direction Z or opposite to the axial direction Z. The opposite region of the head section 2, in particular, supports other components and thus prevents axial deformation of the corresponding protrusions 7 and 8.

[0054] Figure 6 and 7 A second embodiment of the blind rivet element 1 is shown, wherein the difference between this second embodiment and the first embodiment is mainly in the length of the rod 3.

[0055] exist Figure 8The difference between the third embodiment shown and the second embodiment is essentially that the blind rivet element 1 has a hole 17 in the deformed region 5 that penetrates the rod 3 radially, wherein the holes 17 are arranged circumferentially, and wherein the flat surfaces of the partially hexagonal rod 3 each have a hole 17. The blind rivet element 1 in... Figure 9 and 10 The difference between the embodiment shown and the third embodiment of the blind rivet element 1 lies primarily in the design structure of the head section 2. Figure 9 and 10 The embodiment shown has only a first protrusion 7 and no second protrusion 8. The first protrusion 7 is currently formed by reshaping the head section 2 along the axial direction Z, i.e., by a stamping process. The head section 2 thus has a corresponding retraction structure 18 opposite to the first protrusion 7.

[0056] Figure 11 Another embodiment of the blind rivet element 1, placed in the first member 19 and thus deformed in the deformation section 5, is shown, wherein the second member 20 is also connected by means of a fastening device 21, currently a screw screwed into the internal thread 4 of the blind rivet element 1. Figure 11 It is understood that the head section 2 is arranged between the two components 19 and 20, wherein, due to the force applied when placing the blind rivet element 1 and when tightening the fastening device 21, the protrusions 7 and 8 penetrate into the first component 19 or the second component 20. This achieves, on the one hand, particularly high torsional resistance of the blind rivet element 1, and on the other hand, penetrates any possible coating of the first component 19 or the second component 20, for example, to achieve electrical connection between the blind rivet element 1 and the first component 10 or the second component 20, and in this way, achieves electrical connection between the two components 19 and 20. Figure 11 In the embodiment shown, the protrusions 7 and 8 are formed by axial stamping.

[0057] Blind rivet element 1 in Figure 12 and 13 The embodiment shown differs from previous embodiments of the blind rivet element 1 in that the rod 3 has a connection section 13 for the threaded bolt 14, wherein the threaded bolt 14 is currently connected to the blind rivet element 1 in the region of the connection section 13. A deformable section 5 is currently constructed between the connection section 13 for the threaded bolt 14 and the head section 2.

[0058] List of reference numerals 1. Blind rivet component 2. Head section 3 strokes 4 Internal threads 5 Deformation Sections 6. Lock the head 7 First protrusion 8 Second protrusion 9. Cutting edge 10 First cutting surface 11 Second cutting surface 12 Vacant Departments 13 Connecting Section 14 Threaded Bolts 15 Radial outer region 16 Radial Inner Region 17 holes 18. Retraction Structure 19 First Component 20 Second component Z-axis direction.

Claims

1. A blind rivet element (1), wherein, The blind rivet element (1) has a head section (2) and a rod (3) abutting the head section (2) in an axial direction (Z), wherein the rod (3) has an internal thread (4) or a connecting section (13) for a threaded bolt (14) and a deformable section (5) between the internal thread (4) or the connecting section (13) for the threaded bolt (14) and the head section (2) to form a locking head (6) when the deformable section (5) deforms, wherein the head section (2) has a radially outer region (15), wherein the radial The outer region (15) is constructed radially spaced from the rod (3), wherein the head section (2) has at least one first protrusion (7) protruding in the axial direction (Z), wherein the at least one first protrusion (7) is constructed only in the radially outer region (15) of the head section (2), and wherein the head section (2) has at least one second protrusion (8) protruding against the axial direction (Z), wherein the at least one second protrusion (8) is constructed only in the radially outer region (15) of the head section (2). In the projection along the axial direction (Z), the head segment (2) has a gap (12) adjacent to the at least one first protrusion (7) and / or has a gap (12) adjacent to the at least one second protrusion (8).

2. The blind rivet element according to claim 1, wherein, The radial distance between the corresponding protrusions (7, 8) and the rod (3) is at least 50% of the radial distance between the outer edge of the head section (2) and the rod (3).

3. The blind rivet element according to claim 2, wherein, The radial distance between the corresponding protrusions (7, 8) and the rod (3) is at least 60% of the radial distance between the outer edge of the head section (2) and the rod (3).

4. The blind rivet element according to claim 3, wherein, The radial distance between the corresponding protrusions (7, 8) and the rod (3) is at least 75% of the radial distance between the outer edge of the head section (2) and the rod (3).

5. The blind rivet element according to any one of claims 1 to 4, wherein, The at least one first protrusion (7) and / or the at least one second protrusion (8) are constructed at the outer edge of the head section (2).

6. The blind rivet element according to claim 1, wherein, In the view along the axial direction (Z), the corresponding vacancy (12) is clockwise adjacent to the at least one first protrusion (7), and / or in the view along the axial direction (Z), the corresponding vacancy (12) is clockwise adjacent to the at least one second protrusion (8).

7. The blind rivet element according to claim 6, wherein, In the axial direction (Z), the head section (2) is adjacent to the at least one first protrusion (7) in a counterclockwise direction without a gap, and / or in the axial direction (Z), the head section (2) is adjacent to the at least one second protrusion (8) in a counterclockwise direction without a gap.

8. The blind rivet element according to claim 6 or 7, wherein, In the axial direction (Z), the corresponding vacancy (12) is counterclockwise adjacent to the at least one first protrusion (7), and / or in the axial direction (Z), the corresponding vacancy is counterclockwise adjacent to the at least one second protrusion (8).

9. The blind rivet element according to claim 8, wherein, In the axial direction (Z), the head section (2) is not missing when it is clockwise adjacent to the at least one first protrusion (7), and / or in the axial direction (Z), the head section (2) is not missing when it is clockwise adjacent to the at least one second protrusion (8).

10. The blind rivet element according to any one of claims 1 to 4, wherein, The at least one first protrusion (7) and / or the at least one second protrusion (8) are formed by local reshaping of the area of ​​the head segment (2).

11. The blind rivet element according to claim 10, wherein, The at least one first protrusion (7) and / or the at least one second protrusion (8) are formed by stamping or bending the area of ​​the head section (2).

12. The blind rivet element according to claim 1, wherein, The at least one first protrusion (7) and / or the at least one second protrusion (8) have a protruding cut edge (9) and / or a protruding tip.

13. The blind rivet element according to claim 12, wherein, The cut edge (9) extends substantially in the radial direction.

14. The blind rivet element according to claim 12 or 13, wherein, The at least one first protrusion (7) and / or the at least one second protrusion (8) have a first cutting surface (10) and a second cutting surface (11) inclined to the first cutting surface (10), wherein the contact line of the cutting surfaces (10, 11) forms the cutting edge (9) of the protrusion (7, 8).

15. The blind rivet element according to claim 14, wherein, The first cutting surface (10) forms a first angle (α) with a plane constructed perpendicular to the axial direction (Z) and the second cutting surface (11) forms a second angle (β) with the plane, wherein the value of the second angle (β) is less than the value of the first angle (α), and the second cutting surface (11) faces the vacancy (12).

16. The blind rivet element according to any one of claims 1 to 4, wherein, The blind rivet element (1) has a plurality of first protrusions (7) and / or a plurality of second protrusions (8), wherein all of the plurality of first protrusions (7) and / or all of the plurality of second protrusions (8) are constructed around an axis constructed along the axial direction (Z), and the blind rivet element (1) has a plurality of first protrusions (7) and a plurality of second protrusions (8), wherein the plurality of first protrusions (7) and the plurality of second protrusions (8) are constructed alternately along the circumferential direction.

17. The blind rivet element according to any one of claims 1 to 4, wherein, The head segment (2) has a greater extension length along the axial direction (Z) in the region of the first protrusion (7) and / or in the region of the second protrusion (8) than in the region adjacent to the head segment (2).

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