Clipwave System

Abstract

An arrangement is provided for fastening a structural element, which has a retaining device that interacts with a T-stud, wherein the T-stud has a stud shaft and a stud head with an underhead having a contact surface for contacting at least one counter-surface formed on the retaining device. The stud shaft can be welded to a component. The at least one counter-surface of the retaining device is designed on a contact shoulder for the underhead of the stud head which encompasses the stud at least in part. A plurality of recesses are designed in the contact shoulder of the retaining apparatus, interrupting the counter-surface, wherein the contact surface of the underhead contacts the contact shoulder of the retaining apparatus in the plane of the countersurface.

Claims

1. An arrangement for fastening a retaining element formed of plastic to a metal surface, the arrangement comprising: a retaining device, on which a bottom wall is configured; a T-stud having a stud shank and a stud head, the stud head having an underhead with a contact surface that contacts at least one counter-surface formed on the retaining device, wherein the stud shank is welded to the metal surface, the at least one counter-surface of the retaining device is configured on at least one bearing shoulder that interacts with the underhead of the stud head, the at least one bearing shoulder encloses the stud shank at least partially, and a plurality of recesses are configured in the bearing shoulder of the retaining device, the recesses interrupting the counter-surface.

2. The arrangement according to claim 1, wherein a U-shaped passaged with a circumferential side wall is formed on the retaining device, through which side wall the shank of the T-stud protrudes, and the at least one bearing shoulder provided with the plurality of recesses protrudes inward from the side wall.

3. The arrangement according to claim 2, wherein the bearing shoulder extends continuously on the side wall around the U-shaped passage, and the plurality of recesses are configured as a plurality of undulations, wherein peaks of the undulations form the counter-surface.

4. The arrangement according to claim 3, wherein the undulations extend in a direction of an opening of the U-shaped passage, and the peaks of the undulations are arranged parallel to one another.

5. The arrangement according to claim 4, further comprising: a locking pawl sprung in a direction of the stud shank, the locking pawl being arranged in front of the opening of the U-shaped passage on the retaining device, and wherein the locking pawl prevents the stud from exiting the U-shaped passage in the locked position.

6. The arrangement according to claim 1, wherein the retaining element is a retaining clip for a component of a motor vehicle.

7. The arrangement according to claim 1, wherein the T-stud is a step stud.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG. 1 is a front view of a retaining element having a retaining device.

[0011] FIG. 2 is a rear view of the retaining element from FIG. 1 with the retaining device.

[0012] FIG. 3 is a sectional detailed view of the retaining element from FIG. 1 of detail B-B.

[0013] FIG. 4 is a sectional detailed view of the retaining element from FIG. 1 of detail A-A.

[0014] FIG. 5 is a perspective view obliquely from above of a detail of the retaining device from FIG. 1.

[0015] FIG. 6 is a view of the detail of the retaining device from FIG. 5 with a locking pawl,

[0016] FIG. 7A is a perspective view of a T stud with a recessed shank.

[0017] FIG. 7B is a perspective view of a T stud with a continuous shank.

DETAILED DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 shows a view from the front of a retaining element 1 having a retaining device 2. The retaining element 1 is held by a T stud 3 (cf. FIG. 4) and serves to block a component which can be a structural element of a motor vehicle, for example a rail or trim part. As can be seen from FIG. 5, the retaining device 2 which is configured on the retaining element has a bottom wall 9, in which a U-shaped passage 12 with a circumferential side wall 13 is formed. In the exemplary embodiment which is shown, the retaining device 2 is arranged in a somewhat depressed manner on the retaining element. Here, a bearing shoulder 10 which is provided with recesses and protrudes radially inward is configured on the side wall 13 approximately halfway up the height of the wall. The bearing shoulder 10 has a corresponding face 8, onto which the underhead 6 of a stud head 5 of the T stud 3 can come into contact, cf. FIGS. 7A and 7B.

[0019] The T studs 3 are welded at the base of the stud shank onto a metal surface 16, the stud head serving as a locking device for fastening elements. Despite their small size and, as a result, extremely low overall height with respect to the component, they achieve very high strength values in the welded connection.

[0020] As can be seen from FIGS. 4 and 7A, the bearing face 7 on the underhead 6 of the stud head 5 of the T stud 3 points toward the welded connection. The welding operation is usually a drawn arc stud welding process, in which spraying of molten material spatters 17 can occur which can be deposited on the bearing face 7 of the underhead 6, cf. FIGS. 4 and 7B.

[0021] Recesses 11 which interrupt the corresponding face 8 are configured in the bearing shoulder 10. Contaminants which are fixed on the bearing face 7 of the underhead 6, for example welding particles 17, can enter into said recesses 11, with the result that the underhead 6 can come into contact on the corresponding face 8 which extends between the recesses 11 of the bearing shoulder 10. In the exemplary embodiment which is shown, as can be seen from FIGS. 3 and 5, the multiplicity of recesses 11 consist of a plurality of undulations, the undulation peaks 14 of which form the corresponding face 8. The undulations run in the direction of the opening 12′ of the U-shaped passage 12, with the result that all undulation peaks 14 are arranged parallel to one another, cf. FIGS. 3, 5 and 6. As can be seen, in particular, in FIGS. 1, 2 and 6, a locking pawl 15 which is sprung in the direction of the stud shank is arranged in front of the opening 12′ of the U-shaped passage 12 on the retaining device 2. The locking pawl 15, in the locked position, prevents the stud from exiting out of the U-shaped passage 12 counter to the snapping-in direction.

[0022] In one design variant (not shown), a cutout of the retaining shoulder can be configured on the side wall, the consequence of which cutout is that the bearing shoulder is given a certain degree of freedom of movement. It can likewise be provided in one embodiment (not shown) that the undulation peaks produce the bearing face of an inwardly extending rib, with the result that, in the case of a cutout which is carried out at the same time, a high degree of freedom of movement of a bearing rib of this type is obtained toward the side wall, and said bearing rib can avoid a relatively large welding spatter in an improved manner.

[0023] The undulation troughs which extend downward through the bearing shoulder in this way can compensate for relatively great contamination of the underhead of the stud head.

LIST OF DESIGNATIONS

[0024] Retaining element (1) [0025] Retaining device (2) [0026] T stud (3) [0027] Stud shank (4) [0028] Stud head (5) [0029] Underhead (6) [0030] Bearing face of the underhead (7) [0031] Corresponding face on the bearing shoulder (8) [0032] Bottom wall (9) [0033] Bearing shoulder (10) [0034] Recesses (11) [0035] Passage (12) [0036] Side wall (13) [0037] Undulation peak (14) [0038] Locking pawl (15) [0039] Metal surface (16) [0040] Molten material or welding spatters (17)

[0041] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.