Fastening assembly

Abstract

The invention relates to a fastening assembly with a fastening element (1) for the elastic joining of an attachment part (3) at a carrier part, in particular a panel part (5), wherein the fastening element (1) has a head part (7) which transitions into an element shank (9), wherein an elastomer profile part (13) with a radially outwardly open holding groove (15) is arranged at the underside of the head part, into which holding groove an attachment part holding foot (17) can be engaged, wherein the holding groove (15) is configured with a head-side groove wall (19) and a shank-side groove wall (21). According to the invention, the elastomer profile part (13) is composed at least in two parts of an elastomer base body (25) arranged at the head part (7) of the fastening element (1) and a disc-shaped element (27) which has at least the shank-side groove wall (21) of the holding groove (15). The disc-shaped element (27) is composed in particular also of two components, namely an elastomer profile part (21) and a hard component (29).

Description

TECHNICAL FIELD

[0001] The invention relates to a fastening assembly with a fastening element. BACKGROUND

[0002] A fastening assembly of this type is known from DE 10 2013 011 878 A1. The fastening assembly has a fastening element by means of which a windscreen wiper motor or the like can be elastically joined as an attachment part at a body panel part of a vehicle. The fastening element made of plastic has an expanded head part which transitions into an element shank. An elastomer profile part with a radially outwardly open holding groove is arranged at the bottom side of the head part. A holding foot of the attachment part can be engaged into the holding groove of the elastomer profile part of the fastening element. The holding groove configured in the elastomer profile part has a head-side groove wall, a shank-side groove wall and a radially inner groove bottom.

[0003] A pre-assembly process is carried out in a supplier factory, in which the fastening element is pre-assembled at the attachment part holding foot. The structural unit consisting of the attachment part and the fastening element is then transferred to an automobile manufacturer, in which a final assembly process is carried out. In the final assembly process, the fastening element is guided with its element shank through an assembly opening of the panel part into a final assembly position. In the final assembly position, the head part presses the elastomer profile part against the panel part with a built-in elastic pretension, so that the attachment part holding foot engaged into the elastomer profile part is elastically pretensioned in the axial direction.

[0004] In DE 10 2013 011 878 A1, the elastomer profile part is formed uniformly and in one piece from an elastomer material. The groove width of the holding groove configured in the elastomer profile part is dimensioned such that, in the pre-assembly process, the holding foot is already engaged with the holding groove with a built-in elastic pretension. Due to the uniform and one-piece configuration of the elastomer profile part, the pre-assembly process is particularly technically costly to design. Furthermore, it is common practice in the prior art to use multiple elements for fastening. SUMMARY

[0005] It is an object of the invention to provide a fastening assembly with a fastening element for elastically joining an attachment part at a panel part, by means of which the pre-assembly process and / or the final assembly process for assembling the attachment part at the panel part is simplified.

[0006] This object is achieved by a fastening assembly with a fastening element according to the invention.

[0007] The invention starts from a fastening assembly with a fastening element with which an attachment part can be elastically joined at a carrier, for example a sheet metal part. The fastening element has a head part which transitions into an element shank. At the underside of the head part an elastomer profile part is arranged which has a radially outwardly open holding groove. An attachment part holding foot can be engaged into the holding groove of the elastomer profile part. In the usual practice, for example, in a pre-assembly process in the supplier's factory, the fastening element is pre-assembled at the attachment part holding foot. Subsequently, the structural unit consisting of attachment part and fastening element can be transferred to the automobile manufacturer, where the final assembly process takes place. In the final assembly process, the fastening element is guided with its element shank through an assembly opening of the sheet metal part until the final assembly position. In the final assembly position, the head part presses the elastomer profile part against the sheet metal part with a built-in elastic pretension. In this way, the attachment part holding foot is elastically pretensioned in the axial direction. According to the invention, the elastomer profile part is no longer constructed materially uniform and in one piece, but instead, contrary to this, at least two-part from an elastomer base body arranged at the head part of the fastening element and a disc-shaped element. The disc-shaped element has at least the groove wall of the holding groove on at least one shank side. Furthermore, the disc-shaped element is axially adjustably supported on the element shank via an axial movement gap by means of an axial guide. As is also described later, the disc-shaped element can consist of two materials. By means of the axial guide, the disc-shaped element can be adjusted smoothly in the axial direction, whereby the pre-assembly process is simplified. By means of the axial guide, the groove width of the holding groove constructed in the elastomer profile part can be varied smoothly, so that in the pre-assembly process the attachment part holding foot can be engaged with the holding groove of the elastomer profile part without a built-in pretension.

[0008] In the present invention, the following process sequence is followed: in a first stage, the manufacture of the main component (e.g. a wiper motor or other drive or controller) and the separate manufacture of the fastening element (or clamping element) according to the invention take place; in a second stage, a pre-assembly is carried out, in which the fastening element is fitted to the holding foot of the main component. Thereby, a ready-to-install assembly is produced, for example at the supplier's site. The disc-shaped element according to the invention is still axially displaceable on the clamping element. No pre-tensioning of the elastomer part is present yet. In addition, a pre-latching is also built in. The fastening element is secured to the holding foot of the main component (or attachment part) by slight latching of the disc-shaped element on the fastening element, by means of a loss prevention device, preferably a slot-bridge geometry. The slot is implemented relatively wide in order to enable axial displacement of the bridge. In a third stage, the transport of the ready-to-install assembly from the supplier to the assembly line of the automobile manufacturer takes place. In a fourth stage, the final assembly takes place, in which the ready-to-install assembly is installed on the assembly line to the carrier part at the vehicle (or directly to the vehicle body or to the composite part). The abutment on the elastomer part or the final pre-tensioning is built in and maintained.

[0009] The overall component consisting of the fastening element and the disc-shaped element according to the invention offers the technical possibility of eliminating or mitigating the disadvantages of the prior art. Basically, the idea consists in the combination of the two-component component (i.e. the fastening element and the disc-shaped element), which is joined to each other in a special way and can be pre-assembled at the main component. The pre-assembly is preferably carried out in such a way that first the clamping element is fitted to the holding foot of the attachment part and then the disc-shaped element is plugged onto this clamping element. The plugging can be carried out manually, but is preferably carried out automatically. After plugging of the disc-shaped element, this disc-shaped element is still axially displaceable on the clamping element. Thereby, a greater ease of adaptation to the environment and robustness during assembly and transport are produced.

[0010] The core of the invention here consists in the combination of two components (i.e. the fastening part and the disc-shaped element), which can both be realized as two-component components and are joined to each other in a special way and can be fixedly held at the holding foot of the attachment part in all the stages mentioned above and, from the fourth stage, fixedly hold and dampen the main component itself. Before the final assembly of the attachment part (i.e. in the so-called delivery state = ready to install), the disc-shaped element is axially displaceable on the fastening element. By appropriate design, the technical mutual cooperation of the two two-component components is variable after the final assembly. Thereby, a greater ease of adaptation to the environment and requirements and a higher robustness are produced. Each of the two elements consists of a hard component and an elastomer component.

[0011] An important feature / advantage is the displaceability of the disc-shaped element along the longitudinal axis of the fastening element in the preassembled state. The desired pretensioning or elastomer region (fastening element and disc-shaped element, respectively) is built during the abutment of the carrier part and the holding foot or at which the attachment part is finally assembled to the carrier part. The axial displaceability of the disc-shaped element on the clamping element ensures a reliable assembly process and problem-free transport and handling until final assembly.

[0012] In a structurally simple embodiment variant, the axial guidance of the disc-shaped element is configured such that at least one axial bridge can project from the inner circumference of the disc-shaped element. The axial bridge cooperates with an axial groove located in the groove bottom of the holding groove, wherein the axial bridge of the disc-shaped element is axially adjustable but rotationally fixed. In a simple design, the axial groove can be configured as a material interruption in the elastomer material of the elastomer base body.

[0013] For the stable clamping connection of the fastening element at the panel part described later, the building of the pre-defined clamping force described later between the fastening element and the panel part is important. In this context, the axial groove located in the groove bottom of the holding groove of the elastomer profile part can end axially with an axial stop on the head side. In the final assembly process, this axial stop limits the axial movement of the disc-shaped element in the direction of the head part. Thus, the insertion movement of the fastening element into the assembly opening of the panel part during the final assembly process is also limited.

[0014] In a preferred technical implementation, the disc-shaped element can be fixed at the fastening element by means of a toollessly releasable anti-loss device. In this way, the fastening element can be maintained as a structural unit with the disc-shaped element before the preassembly process is carried out. Structurally simply: the anti-loss device has a form-fit pairing that cooperates with one another, which is configured not only at the inner circumference of the disc-shaped element but also at the outer circumference of the element shank. For example, the form-fit pairing can be an axial groove configured at the outer circumference of the element shank and a pre-click bridge configured at the inner circumference of the disc-shaped element, which projects into the axial groove.

[0015] For the stable fastening of the fastening element at the panel part, it is preferred that the disc-shaped element is configured as a two-component member. In this case, the shank-side groove wall composed of elastomer material can form the soft component. In addition, the disc-shaped element can have a hard component facing the shank tip, which supports the opening edge region of the panel part over a large area in the final assembly state.

[0016] During the final assembly process, the fastening element can be fixed at the sheet metal part in different ways. It is simple in terms of manufacturing technology if the fastening element has at least one fastening lug in the region of the shank tip of the element shank, which projects radially outwards from the element shank. In this case, the final assembly process can be carried out by means of a plug-in-rotating manoeuvre. To this end, the fastening element is first guided through the assembly opening of the sheet metal part in the plug-in direction. Subsequently, a rotating manoeuvre is carried out, in which the fastening element is rotated into the final assembly position. In the final assembly position, the fastening lug engages the opening edge region of the sheet metal part from below. Furthermore, in the final assembly position, the opening edge region of the sheet metal part is clamped between the upper side of the disc-shaped element and the fastening lug with axial pre-tensioning.

[0017] The stable clamping of the opening edge region of the assembly opening of the sheet metal part between the upper side of the disc-shaped element and the fastening lug is of great importance for the operationally reliable holding of the attached component. In this context, the axial bridge geometry can be designed in such a way that, in the final assembly position, the axial bridge of the sheet metal part can be guided into pressure abutment against the axial stop of the fastening element with the axial movement play being used up. Thus, the disc-shaped element is supported at the axial stop of the fastening element via its axial bridge, whereby the disc-shaped element can press the sheet metal part against the upper side of the fastening lug with a predefined clamping force.

[0018] Due to the two-part embodiment of the elastomer profile part according to the application, the disc-shaped element can be axially displaced at any time for simplifying assembly. For sheet metal parts of different sheet metal thicknesses, different disc-shaped elements can be provided, which have an axial bridge height adapted to the respective sheet metal thickness. It applies here that the greater the sheet metal thickness, the smaller the axial bridge height. In this way, a greater axial movement play is maintained until the axial bridge of the sheet metal part is in pressure abutment against the axial stop of the fastening element in order to provide a predefined clamping force. It applies conversely that the smaller the sheet metal thickness, the greater the axial bridge height. BRIEF DESCRIPTION OF DRAWINGS

[0019] Embodiments of the application are described below with reference to the accompanying drawings.

[0020] wherein:

[0021] Figure 1 and Figure 2 different side views of the fastening element are shown separately;

[0022] Figure 3 the fastening element is shown in an exploded view, wherein the disc-shaped element is detached;

[0023] Figure 4 and Figure 5 different sectional views of the fastening element are shown;

[0024] Figures 6 to 11 Views showing the process sequence for assembling the attachment parts and sheet metal parts according to their descriptions are provided. Detailed Implementation

[0025] Figures 1 to 3 The fastening element 1 is shown in different views. For example... Figure 11 As shown, the attachment 3 can be elastically connected to the body panel component 5 by means of a fastening element 1. The fastening element 1, made of plastic, has an expanded head component 7 that transitions into the component shank 9. Fastening protrusions 11, 13 are constructed in the region of the component shank tip, extending radially outward from the component shank 9. Furthermore, an elastomeric profile component 13 with a radially outwardly opening retaining groove 15 is arranged on the underside of the head component 7. The retaining foot 17 of the attachment 3 can engage in the retaining groove 15. Figure 4 or Figure 5 It is understood that the retaining groove 15 has a groove wall 19 on the head side, a groove wall 21 on the handle side, and a groove bottom 23 in the radial interior.

[0026] according to Figure 3 and Figure 4 The elastomer profile component 13 is not constructed as a single piece of material, but rather as a two-piece structure, comprising an elastomer base 25 and a disc-shaped element 27 arranged at the head component 7 of the fastening element 1. Figure 4 and Figure 5 In this configuration, the disc-shaped element 27 is constructed as a two-component component, namely, having a groove wall 21 on the handle side composed of an elastomeric material forming the soft component and a hard component 29 facing the handle tip (which is supported on the plate component 5 in the final assembled state). The groove wall 19 on the head side and the radially inward groove bottom 23 are constructed within the elastomeric matrix 25.

[0027] The disc-shaped element 27 is guided axially via a moving gap a ( Figure 4 The disc element 27 is axially adjustable and supported on the element handle 9. In this way, the disc element 27 can be smoothly adjusted in the axial direction to set the slot width b between the two opposing slot walls 19, 21. Figure 4 ).

[0028] according to Figure 3 The axial guide has an axial bridging portion 33 constructed on the inner circumference of the disc element and positioned opposite each other in diameter, and the axial bridging portion extends axially from the inner circumference 27 of the disc element at a height h. Figure 4 It should be emphasized that, as Figure 3 , Figure 4 or Figure 8It is understood that each axial bridging part 33 is constructed in two parts by a rigid component 29 and an elastomeric material of the groove wall 21 on the shank side.

[0029] according to Figure 3 The elastomer matrix 25 is fixedly positioned on the bottom side of the head component and on the annular joint 35 constructed at the element handle 9. Figure 3 )between.

[0030] Each of the axial bridging portions 33 of the disc-shaped element 27 has an axial groove 37 located in the groove bottom 23 of the retaining groove 15. Figure 3 The axial groove 37 is axially adjustable but anti-rotationally guided. The corresponding axial groove 37 is constructed here as a material interruption in the elastomeric material of the elastomeric matrix 25. Furthermore, the axial groove 37 located in the groove bottom 29 of the retaining groove 15 has an axial stop 39 on the head side. Figure 3 This restricts the axial movement of the sheet metal part 27 in the direction of the head part 7 during the final assembly process described later, and thus restricts the insertion movement of the fastening element 1 into the assembly opening 41 of the sheet metal part 5 during the final assembly process.

[0031] As from Figure 4 As further understood, the disc-shaped element 27 is axially adjustable at the element handle 9 of the fastening element 1 via an anti-loss device 43. Figure 3 The anti-loss device 43 has an axial groove 45 on the outer circumference of the element handle 9 and a pre-locking bridge portion 47 constructed on the inner circumference of the disc element 27, which extends into the axial groove 45.

[0032] In the following text, it will be based on the attached document. Figures 6 to 8 The pre-assembly process is described, in which fastening element 1 is pre-assembled onto retaining foot 17 of attachment part 3. Therefore, according to... Figure 6 and Figure 7 With the disc-shaped element 27 still loose, the fastening element 1, with its element handle 9, is guided through the C-shaped fastening hole 49 of the attachment retaining foot 17. Then, according to Figure 8 The disc-shaped element 27 is pushed onto the element handle 9 of the fastening element 1 until the pre-locking bridge 47 loosely engages with the axial groove 45 located on the outer circumference of the element handle 9, thereby providing an anti-loss device 43. Therefore, the pre-assembly process is carried out without building tension.

[0033] Subsequently, according to Figures 9 to 11A final assembly process is carried out. The final assembly process is carried out by means of the plug-rotary manipulation of the rotary handle 51 constructed at the head part 7. First, the fastening element 1 is guided with its element shank 9 in the plug direction through the assembly opening 41 of the panel part 5 and subsequently the fastening element 1 is rotated into a final assembly position in which the fastening lugs 11, 12 engage the opening edge region of the assembly opening 41 of the panel part 5 from below. In the final assembly position, the head part 7 presses the two-part elastomer profile part 13 against the panel part 5 with a built-in elastic pretension, so that the attachment part holding foot 17 is elastically pretensioned in the axial direction. Furthermore, in the final assembly position, the opening edge region of the assembly opening 41 of the panel part 5 is clamped with a predefined clamping force between the disc element 27 of the fastening element 1 and the upper side 53 of the fastening lugs 11, 12. Their construction geometry corresponds to the component geometry of the lugs disclosed in DE 10 2013 011 878 A1.

[0034] Furthermore, in the final assembly position, the axial bridge 33 of the disc element 27 is guided with the axial movement clearance a used up into pressure abutment against the axial stop 39 of the fastening element 1. As a result, the disc element 27 is supported via its axial bridge 33 at the axial stop 39 of the fastening element 1, whereby the disc element 27 presses the opening edge region of the panel part 5 against the upper side 53 of the fastening lugs 11, 12 with a predefined clamping force.

[0035] The fastening element 1 according to the application can be provided for panel parts 5 of different panel thicknesses. To this end, different panel elements 27 can be provided respectively, the axial bridge height h of which is adapted to the respective panel thickness. It applies here that the greater the panel thickness of the panel part 5, the smaller the axial bridge height h. It applies conversely that the smaller the panel thickness of the panel part 5, the greater the axial bridge height h in order to achieve a predefined clamping force by supporting the panel part-axial bridge 33 at the axial stop 39 of the fastening element 1.

[0036] List of reference signs

[0037] 1 fastening element

[0038] 3 attachment part

[0039] 5 panel part

[0040] 7 head part

[0041] 9 element shank

[0042] 11, 12 fastening lugs

[0043] 13 elastomer profile part

[0044] 15 holding groove

[0045] 17 retaining foot

[0046] 19 groove wall on the head side of the elastomer component

[0047] 21 groove wall on the shank side of the elastomer component

[0048] 23 radially inner groove bottom

[0049] 25 elastomer matrix at the head part

[0050] 27 disc-shaped element

[0051] 29 hard component

[0052] 33 axial bridge

[0053] 35 annular joint

[0054] 37 axial slot

[0055] 39 axial stop

[0056] 41 assembly opening

[0057] 43 anti-loss device

[0058] 45 axial slot

[0059] 47 pre-latching bridge

[0060] 49 fastening eyelet

[0061] 51 turning handle

[0062] 53 upper side of the fastening lug

[0063] a movement clearance

[0064] b groove width

[0065] h axial bridge height

Claims

1. A fastening assembly having a fastening element (1) for resiliently connecting an attachment part (3) to a carrier part, wherein, The fastening element (1) has a head component (7) that transitions into a shank (9). An elastomeric profile component (13) with a radially outwardly opening retaining groove (15) is arranged on the underside of the head component. An attachment retaining foot (17) can engage with the retaining groove. The retaining groove (15) is constructed with a groove wall (19) on the head side and a groove wall (21) on the shank side. The elastomeric profile component (13) is characterized by being constructed in at least two parts from an elastomeric base (25) arranged at the head component (7) of the fastening element (1) and a disc-shaped element (27), the disc-shaped element having at least the retaining groove (15). The groove wall (21) on the handle side of the element (9) is provided, wherein the disc element (27) is held at the fastening element (1) by means of an anti-loss device (43), and the anti-loss device (43) has a shape-fitting pair (45, 47) that works together, the shape-fitting pair being constructed at the inner circumference of the disc element (27) and at the outer circumference of the element handle (9), wherein the shape-fitting pair (45, 47) is an axial groove (45) and a pre-locking bridge (47) extending into the axial groove (45), and wherein the axial groove (45) is provided to allow axial displacement of the pre-locking bridge (47).

2. The fastening assembly according to claim 1, characterized in that, The carrier component is a sheet metal component (5).

3. The fastening assembly according to claim 1 or 2, characterized in that, During the pre-assembly process, the fastening element (1) can be pre-assembled at the attachment part retaining foot (17).

4. The fastening assembly according to claim 1 or 2, characterized in that, During the pre-assembly process, the fastening element (1) can be pre-assembled without tension at the attachment part retaining foot (17).

5. The fastening assembly according to claim 1 or 2, characterized in that, During pre-assembly, the fastening element (1) can be pre-assembled without tension at the attachment retaining foot (17), and during final assembly, the fastening element (1) can be guided by its element handle (9) through the assembly opening (41) of the carrier component until the final assembly position, in which the head component (7) uses elastic pre-tension to press the elastomeric profile component (13) against the carrier component, thereby elastically pre-tensioning the attachment retaining foot (17).

6. The fastening assembly according to claim 1 or 2, characterized in that, The disc-shaped element (27) is axially adjustable on the element handle (9) via a moving gap (a).

7. The fastening assembly according to claim 1 or 2, characterized in that, The disc-shaped element (27) is axially adjustable on the element handle (9) via a moving gap (a), and the disc-shaped element (27) can be smoothly adjusted in the axial direction to simplify the pre-assembly process or the final assembly process.

8. The fastening assembly according to claim 1 or 2, characterized in that, In order to construct the axial guide of the disc element (27), at least one axial bridge (33) extends axially from the inner circumference of the disc element (27), and the axial bridge is axially adjustable but anti-rotationally guided in an axial groove (37) located in the groove bottom (23) of the retaining groove (15).

9. The fastening assembly according to claim 1 or 2, characterized in that, In order to construct the axial guide of the disc element (27), at least one axial bridging portion (33) extends axially from the inner circumference of the disc element (27), the axial bridging portion being axially adjustable but anti-rotationally guided in an axial groove (37) located in the groove bottom (23) of the retaining groove (15), and the axial groove (37) being constructed as a material interruption in the elastomeric material of the elastomeric matrix (25).

10. The fastening assembly according to claim 8, characterized in that, The axial groove (37) located in the bottom (23) of the retaining groove (15) ends at the head side with an axial stop (39), which restricts the axial movement of the disc element (27) in the direction of the head component (7) during the final assembly process.

11. The fastening assembly according to claim 8, characterized in that, The axial groove (37) located in the bottom (23) of the retaining groove (15) ends at the head side with an axial stop (39), which restricts the axial movement of the disc element (27) in the direction of the head component (7) during the final assembly process, and thus restricts the insertion movement of the fastening element (1) into the assembly opening (41) of the carrier component during the final assembly process.

12. The fastening assembly according to any one of claims 1 to 2, characterized in that, The disc-shaped element (27) is constructed as a two-component component, namely having a groove wall (21) on the handle side made of an elastomeric material forming a soft component and a hard component (29) facing the handle tip, the hard component being supported on the carrier component in the final assembled state.

13. The fastening assembly according to any one of claims 1 to 2, characterized in that, The fastening element (1) has at least one fastening protrusion (11, 12) at the tip of the element handle (9), the fastening protrusion extending radially outward from the element handle (9).

14. The fastening assembly according to any one of claims 1 to 2, characterized in that, The fastening element (1) has at least one fastening protrusion (11, 12) at the tip of the element handle (9), the fastening protrusion extending radially outward from the element handle (9) and being engaged-rotated during final assembly, wherein the fastening element (1) is capable of being guided through the assembly opening (41) of the carrier component in the engagement direction, and subsequently the fastening element (1) is capable of being rotated to the final assembly position, wherein the fastening protrusion (11, 12) engages the opening edge region of the carrier component from below.

15. The fastening assembly according to any one of claims 1 to 2, characterized in that, The fastening element (1) has at least one fastening protrusion (11, 12) at the tip of the element handle (9), the fastening protrusion extending radially outward from the element handle (9) and being engaged-rotated during final assembly. The fastening element (1) is guided through the assembly opening (41) of the carrier component in the engagement direction and is subsequently rotated to the final assembly position. The fastening protrusion (11, 12) engages the opening edge region of the carrier component from below, and in the final assembly position, the opening edge region of the carrier component is clamped between the disc element (27) and the upper side (53) of the fastening protrusion (11, 12) by axial pretension.

16. The fastening assembly according to claim 6, characterized in that, The fastening element (1) has at least one fastening protrusion (11, 12) at the tip of the element handle (9), the fastening protrusion extending radially outward from the element handle (9), wherein, in order to construct the axial guide of the disc element (27), at least one axial bridging portion (33) extends axially from the inner circumference of the disc element (27), the axial bridging portion being axially adjustable but anti-rotationally guided in an axial groove (37) located in the groove bottom (23) of the retaining groove (15), wherein, in the final assembly position, the axial bridging portion (33) of the disc element (27) is guided to press against the axial stop (39) of the fastening element (1) with the movement clearance (a) exhausted, the disc element (27) being supported at the axial stop so as to press the carrier component against the upper side (53) of the fastening protrusion (11, 12) with a predetermined clamping force.

17. The fastening assembly according to claim 6, characterized in that, The fastening element (1) has at least one fastening protrusion (11, 12) at the tip of the element handle (9), the fastening protrusion extending radially outward from the element handle (9), wherein, in order to construct the axial guide of the disc-shaped element (27), at least one axial bridging portion (33) extends axially from the inner circumference of the disc-shaped element (27), the axial bridging portion being axially adjustable but anti-rotational in an axial groove (37) located in the groove bottom (23) of the retaining groove (15). The disc element (27) is guided to press against the axial stop (39) of the fastening element (1) in the final assembly position, after exhausting the movement clearance (a). The disc element (27) is supported at the axial stop so as to press the carrier component against the upper side (53) of the fastening protrusion (11, 12) with a predetermined clamping force, wherein the movement clearance (a) is greater than 0 in the final assembly state.

18. The fastening assembly according to claim 16, characterized in that, For carrier components with different material thicknesses, disc-shaped elements (27) can be provided respectively. The height (h) of the axial bridging portion of the disc-shaped element is adapted to the corresponding material thickness when it matches the groove width (b) of the retaining groove (15).

19. The fastening assembly according to claim 16, characterized in that, For carrier components with different material thicknesses, disc-shaped elements (27) can be provided respectively. The axial bridging height (h) of the disc-shaped element is adapted to the corresponding material thickness when it is matched with the groove width (b) of the retaining groove (15). That is, the greater the material thickness of the carrier component, the smaller the axial bridging height (h), or the smaller the material thickness of the carrier component, the greater the axial bridging height (h).

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