DE102011104386A1 - Fastening device for fastening component e.g. tail lamp at chassis of vehicle, has cap which is moved for tensioning spring element such that threads and spring element are moved so as to fix the component to vehicle chassis - Google Patents

Abstract

The fastening device (1) has holder (3) having spring seat (5) and axially movable cap (6), which is fastened to vehicle chassis (2). The thread (9) of the screw (8) is acted upon the thread (11) of the holder, and thread (10) of the screw is acted upon the thread (12) of the bolt (4). A spring element (7) is provided between spring seat and cap so that tightening of the screw is enabled. The cap is moved for tensioning the spring element such that the threads and spring element are moved with respect to each other so as to fix the component to the vehicle chassis. An independent claim is included for method for fastening component at vehicle chassis.

Description

The present invention relates to a fastening device for releasably securing a component to a vehicle part and a method for this purpose.

A fastening device is for example in the DE 20 2007 016 945 U1 shown. Here, a bracket is attached to a vehicle body, which is then screwed by means of a screw with a bolt attached to the lamp. The screw is in operative connection with the holder and the bolt. The screw has a first thread and a counter-rotating second thread, wherein the first thread of the screw acts on a thread of the holder and the second thread of the screw acts on a thread of the bolt. About these two opposing thread so manufacturing tolerances can be compensated in the axial direction, for example. In this case, the axial direction should be understood to mean the direction along the longitudinal axis of the bolt.

However, such a tolerance compensation requires at least a repeated opening or loosening the screw for readjusting the bolt or the tail light. This process, which may even need to be repeated, is relatively cumbersome, time consuming and costly.

Such fastening devices and methods are used, for example, in the automotive industry for fastening lights, in particular tail lights or taillights on a vehicle part such as a vehicle body.

The invention is therefore based on the object to improve the attachment of a component to a vehicle body so that overall results in a simpler, faster and thus less expensive installation of the component. It is another object of the invention to enable a manual assembly of the component, for example, without the use of tools.

The solution of the problem is achieved with a device according to claim 1 and a method according to claim 9. Advantageous developments of the invention are described in the subclaims.

The fastening device according to the invention has a holder with a spring receptacle and a cap axially displaceable for this purpose. Between the spring receptacle and the cap, a spring element is arranged, which presses apart the spring receptacle and the cap, so that tightening the screw causes an axial displacement of the cap relative to the spring receptacle and thus a tensioning of the spring element. Furthermore, the tightening of the screw causes a drive of the bolt. It is thus in particular a compression spring whose spring force acts in the tensioned state both on the cap and on the spring receptacle.

The opposing threads of the fastening device and the spring element according to the invention are coordinated such that for fastening the component on the vehicle part at most one revolution of the screw is necessary. This can be done, for example, by tuning the threads to a desired spring force so that when tightening the screw this still sits securely in its final position despite the spring force. Furthermore, counter-rotating threads are advantageous over threads with higher thread pitches, since these also allow a greater travel or stroke per revolution, while retaining the self-locking effect of the threads. Thus, a fitter can fasten the component to the vehicle part with a handle, namely with at most one turn of the screw by 360 °. Consequently, eliminates the cumbersome and time-consuming Nachjustiervorgänge. This has the particular advantage that the installer requires less time per component to be assembled. In addition, the axial tolerance compensation is generated by means of the spring element, since this holds the bolt in the axial direction in the holder. This shortens the assembly time considerably.

The spring element may be an arbitrarily designed resilient part, which allows a pushing apart of the cap and the spring retainer. It is advantageous if at least one wave spring is provided as the spring element. Also, the spring element may be configured in several parts. So several z. B. two, separated by a disk wave springs form the spring element. Wave springs have the advantage that they can produce a high spring force in a relatively compact design, and thus with little spring travel.

Conveniently, the screw has at least one manual operating means. This can be, for example, one or more wings, which offer an optimal attack position for the fitter. Further, it is advantageous if the screw is designed as a hollow screw, wherein the first thread of the screw is designed as an external thread and the second counter-rotating thread of the screw is designed as an internal thread. This results in a compact screw with small dimensions.

Further, the bolt is permanently connected to the component at one end. In particular, a connection by means of welding is advantageous. This results in a permanent and reliable connection between the bolt and the component, which in turn contributes to a secure attachment of the component to the vehicle part.

Conveniently, the spring receptacle for attachment to the vehicle part at least one holding element, preferably four holding elements. Thus, at least one retaining element may be formed as a projection. This has the advantage that the spring retainer is axially secured in position on the vehicle part and thus can also absorb forces, in particular the spring force of the spring element.

Another holding element can be designed as a nose extending in the radial direction, in particular in the form of a snap-in nose. This has the advantage that the spring receptacle is secured against rotation in its position. Thus, the holder can not rotate by a rotation of the screw.

It is advantageous if the spring receptacle has at least one guide for the cap in order to prevent the cap from rotating relative to the spring receptacle. This guide may for example be designed in the form of a groove or in the manner of guide rails, wherein the cap then has a corresponding corresponding web or the like, which runs in the groove or in the guide rails. Thus, the cap does not rotate with a movement of the screw and must not be seized separately by the fitter. The assembly is so easy.

Conveniently, the holder has at least one stop, which limits the maximum axial mobility of the cap relative to the spring receiver. This has the advantage that the cap is movable relative to the spring receiving, but can not be detached from this. For this purpose, the spring receptacle may have, for example, an at least partially encircling lip, the cap then having corresponding noses or the like which strike against the lip.

Furthermore, the invention relates to a method for releasably securing a component, in particular a rear or rear light on a vehicle part with a fastening device according to the invention. The inventive method is characterized in that the holder is attached to the vehicle part, that it is inserted into an opening of the vehicle part, and a subsequent rotation produces a positive connection between the holding elements and the vehicle part. This has the advantage that the holder is attached to the vehicle part in a simple manner. Thus, the installation time can be shortened noticeably.

Then the screw is screwed into the holder and the bolt inserted into the holder. As soon as the corresponding screw and bolt threads come into contact, the bolt is driven by turning or tightening the screw by at most one turn in the axial direction relative to the spring retainer. At the same time the cap is driven in the opposite axial direction relative to the spring receiving and against the spring force generated by the spring element. Consequently, the spring element is tensioned and thereby held the bolt by means of the spring force in the axial direction in the holder. This has the advantage that an optimal and thus play-free seat of the component is ensured on the vehicle part by the spring force occurring and, for example, by manufacturing tolerances conditional, readjustment in the axial direction is eliminated.

To further shorten the assembly time, it is expedient if the screw is screwed into the holder already before attaching the holder to the vehicle part and the holder together with the screw forms an assembly. So both parts can be fixed in a single step by the fitter on the vehicle part before he grows the component. This saves time during assembly, since the installer does not have to first screw the screw into the holder.

The invention will be explained in more detail with reference to an embodiment shown in the drawings. In it show schematically:

1 a sectional view (AA) of a fastening device according to the invention with inserted bolt and not yet tightened screw;

2 in the 1 shown fastening device in a rotated by 90 ° sectional view (BB);

3 in the 1 shown fastening device with tightened screw;

4 a plan view of the fastening device according to the invention;

5 a view from below of the fastening device according to the invention;

6 a plan view of a provided in a vehicle part recess for securing the fastening device according to the invention;

7 an exploded view of the fastening device according to the invention; and

8th a perspective view of the fastening device according to the invention.

The 1 to 8th show an embodiment of a fastening device according to the invention 1 for releasably attaching a component not shown in detail to a vehicle part, here a vehicle body 2 is, by means of a holder 3 and a bolt 4 , As in particular in the 1 to 3 can recognize well, is the holder 3 from a spring receiver 5 , one in the axial direction relative to the spring receiver 5 sliding cap 6 and one between the spring receiver 5 and cap 6 arranged spring element 7 ,

Furthermore, the fastening device 1 a hollow screw 8th with an external thread 9 and a counter-rotating internal thread 10 on. How one 3 can take good, attacks when tightened banjo bolt 6 the internal thread 10 on an internal thread 11 the cap 6 at. Furthermore, the internal thread engages 10 the hollow screw 6 at a thread 12 of the bolt 4 at. As by comparing 1 and 3 recognizable, causes tightening of the hollow screw 8th a drive of the bolt 4 in the axial direction relative to the spring receiver 5 and an axial, the drive direction of the bolt 4 opposite moving the cap 4 , As well as a resulting exciting spring element 7 ,

In the embodiment shown here, there is the spring element 7 from an upper wave spring 13 , a lower wave spring 14 and a disk interposed therebetween 15 (see also 7 ). By tightening the banjo bolt 8th and tensioning the spring element 7 a spring force F is generated, which is the spring receptacle 5 and the cap 6 presses apart. To the banjo bolt 8th To put on by hand and without tools, has these two wings 16 on, in particular in 7 and 8th are shown.

How to do that in 1 and 3 shown section along the central section line AA (see 4 ), twisting or co-rotating the cap 6 opposite the spring retainer 5 when tightening the banjo bolt 8th This prevents the spring retainer 5 two are on the outside of the spring retainer 5 opposite guides 17 has, which are designed here as guide rails. The cap 6 has one each to the guides 17 corresponding and in this current footbridge 18 on.

Furthermore, the spring receptacle 5 a radial circumferential stop 19 on which the maximum axial mobility of the cap 6 relative to the spring receiver 5 limited. As in 5 shown, the cap indicates 6 four stop lugs 20 on, which at quarter circle intervals on the inner radial circumference of the cap 6 are arranged. In the axial maximum position of the cap 6 , such as in 1 and 2 shown hit the stop lugs 20 at the stop 19 the spring recording 5 at.

At the in 1 shown state is that of the fastening device 1 attached to the vehicle body and the bolt 4 is already so far in the holder 3 introduced that the first thread of the thread 12 of the bolt 4 the first thread of the internal thread 10 the hollow screw 8th contacted. However, in the state shown here, the hollow screw 8th not yet fully tightened and the spring element 7 is not curious yet. Thus, the (not shown here) component, which is at the end 21 of the bolt 4 is not yet finally on the vehicle body 2 attached.

In contrast to this shows 3 the fastening device 1 with fully tightened banjo bolt 8th , Consequently, the cap is 6 in the axial direction relative to the spring receiver 5 moved down and the spring element 7 curious; excited. Accordingly, the bolt 4 in the opposite axial direction relative to the spring receiver 5 moved and the (not shown) component is thus on the vehicle body 2 attached.

The spring element 7 brings in the tensioned state, a spring force F, which is the spring receptacle 5 and the cap 6 presses apart. Because the spring receiver 5 in the axial direction on the vehicle body 2 supported, the spring force F presses the cap 6 in the direction of the maximum axial position of the cap 6 as indicated by the directional arrow of the spring force F. Through the operative connection between hollow screw 8th and cap 6 on the one hand and between the hollow screw 8th and bolts 4 On the other hand, the spring force F is also indirectly on the bolt 4 transfer. This is therefore also held in the axial direction by means of the spring force F. Thus, axial tolerances of the vehicle body 2 , For example, due to the production, balanced because the component does not necessarily have to completely abut the vehicle body to be held securely.

To automatically loosen the threads 9 . 10 . 11 and 12 For example, by vibrations during use of the vehicle or by the spring element 7 applied spring force F to prevent it is the threads 9 . 10 . 11 and 12 around self-locking thread. It is also conceivable in this connection that, alternatively or additionally, an adhesive is used for securing the screw, or that at least two threads are designed to be self-tapping.

In the illustration according to the 1 to 3 is the holder 3 already in an opening 22 (please refer also 6 ) of the vehicle body 2 attached. For fixing the device 1 has the spring receptacle 5 a total of four retaining elements 23 . 24 on, in 1 and 3 two radially outwardly facing and opposite snap-action lugs 23 are shown. 2 is one opposite 1 90 ° rotated sectional view along the central section line BB (see 4 ) and shows two more holding element 24 namely, opposing projections 24 ,

In the in the 1 to 3 illustrated installed state of the holder 3 are the springy snap noses 23 in two on both sides radially outwardly facing and opposite recesses 25 the in 6 shown opening 22 in the vehicle body 2 snapped positively and thus secure the fastening device 1 rotatably on the vehicle body 2 , Thus, the snap noses define 23 the maximum length L1 of the fastening device 1 in the radial direction. Further define the opposite recesses 25 the opening 22 the maximum radial length L2 of the opening 22 , wherein the length L3 is greater than the length L1.

The projections 24 enclose the vehicle body 2 and thus secure the axial position of the fastening device 1 , The round part of the opening 22 (please refer 6 ) has the diameter L3, which with the projections 24 corresponds, so that a positive connection between the projections 24 and the vehicle body 2 can be produced.

The actual attachment of the bracket 3 on the vehicle body 2 done by inserting the holder 3 in the opening 22 the vehicle body 2 as they are in 6 is shown. This is the holder 3 so in the opening 22 inserted that the projections 24 through the recesses 25 protrude through and thus behind the vehicle body 2 in the direction of the free end 21 of the bolt 4 , lie. Accordingly, the snap lugs are based 23 on the other side of the vehicle body 2 and turn slightly towards the banjo bolt 8th bent. By rotation of the holder 2 enclose the projections 24 the vehicle body 2 and the snap-noses 23 snap into the recesses 25 the opening 22 one. In order to enable a simple and rapid attachment, it is advantageous to select the width of the recesses B1 minimally larger than the width of the snap-in tabs B2 or projections B3. As in particular in 5 shown, are the holding elements 23 . 24 arranged in this embodiment in quarter circle intervals, so that a rotation of the holder 3 90 ° is necessary to this on the vehicle body 2 to fix.

The 7 and 8th show a perspective single view of the components in the manner of an exploded view and a perspective view of a fully assembled fastening device 1 , To assemble the fastening device, the spring element 7 initially between spring receiver 5 and cap 6 arranged and thus the holder 3 educated. Preferred are spring receptacle 5 , Cap 6 and spring element 7 structurally coordinated so that the cap 6 in its axial maximum position by the just not yet tensioned spring element 7 is held.

Subsequently, the holder 3 as already described on the vehicle body 2 attached and the banjo bolt 8th completely in the holder 3 screwed. It is also conceivable that the banjo bolt 8th already in the holder 3 is screwed when this on the vehicle body 2 is attached. Thus form holder 3 and banjo bolt 8th an easy to assemble assembly. Following the attachment of the assembly to the vehicle body 2 becomes the bolt 4 in the holder 3 introduced and by tightening the banjo bolt 8th driven. This moves the bolt 4 axially relative to the spring retainer 5 , By tightening the banjo bolt 8th will the cap 6 also axially relative to the spring receiver 5 but in the opposite direction, moves and the spring element 7 curious; excited.

Furthermore, the threads 9 . 10 . 11 and 12 and the spring element 7 coordinated so that at most one full turn (360 °) of the hollow screw 8th necessary to secure the component to the vehicle body 2 to fix. At a maximum height of the bracket 3 with screwed hollow screw 8th of about 28.95 mm, so for example, an absolute stroke of about 9 mm with a rotation of the hollow screw 8th be made possible by 300 °.

LIST OF REFERENCE NUMBERS

1

fastening device

2

vehicle body

3

bracket

4

bolt

5

spring mount

6

cap

7

spring element

8th

Hohlschraube

9

External thread of the banjo bolt

10

Internal thread of the banjo bolt

11

Internal thread of the cap

12

Thread of the bolt

13

upper wave spring

14

lower wave spring

15

disc

16

wing

17

guides

18

web

19

Stop of the spring retainer

20

stop lug

21

free end of the bolt

22

opening

23

snaplugs

24

head Start

25

Aussparrungen

B1

Width of the recess

B2

Width of the snap nose

B3

Width of the projection

F

spring force

L1

maximum radial length of the fastening device

L2

maximum radial length of the opening

L3

Diameter of the opening

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202007016945 U1 [0002]

Claims (10)

Fastening device ( 1 ) for releasably securing a component to a vehicle part ( 2 ), with a holder ( 3 ), a bolt ( 4 ) and a screw operatively connected to both ( 8th ), whereby the holder ( 3 ) on the vehicle part ( 2 ) and the bolt ( 4 ) are attachable to the component and the screw ( 8th ) a first thread ( 9 ) and a counter-rotating second thread ( 10 ), and the first thread ( 9 ) of the screw ( 8th ) on a thread ( 11 ) of the holder ( 3 ) and the second thread ( 10 ) of the screw ( 8th ) on a thread ( 12 ) of the bolt ( 4 ), characterized in that the holder ( 3 ) a spring receiver ( 5 ) and an axially displaceable cap ( 6 ) and between spring receptacle ( 5 ) and cap ( 6 ) a spring element ( 7 ) is arranged so that tightening the screw ( 8th ) a drive of the bolt ( 4 ) and a sliding of the cap ( 6 ) for tensioning the spring element ( 7 ), whereby the threads ( 9 . 10 . 11 . 12 ) and the spring element ( 7 ) are matched to one another such that for fastening the component to the vehicle part ( 2 ) at most one turn of the screw ( 8th ) is sufficient. Fastening device ( 1 ) according to claim 1, characterized in that as a spring element ( 7 ) at least one wave spring, preferably two by a disc ( 15 ) separate wave springs ( 13 . 14 ) are provided. Fastening device ( 1 ) according to claim 1 or 2, characterized in that the screw ( 8th ), preferably at least one manual operating means ( 16 ), having hollow screw, wherein the first thread ( 9 ) of the screw ( 8th ) is an external thread and the second thread ( 10 ) of the screw ( 8th ) is an internal thread. Fastening device ( 1 ) according to one of the preceding claims, characterized in that the bolt ( 4 ) at one end ( 21 ) permanently connected to the component, in particular welded, is. Fastening device ( 1 ) according to one of the preceding claims, characterized in that the spring receptacle ( 5 ) for attachment to the vehicle part ( 2 ) at least one holding element, preferably four holding elements ( 23 . 24 ) having. Fastening device ( 1 ) according to claim 5, characterized in that at least one retaining element ( 23 ) in the radial direction ersteckende nose, in particular in the form of a snap-in nose, is designed for rotationally fixed position assurance and at least one retaining element ( 24 ) is formed as a projection for axial position assurance. Fastening device ( 1 ) according to one of the preceding claims, characterized in that the spring receptacle ( 5 ) at least one guide ( 17 ) for the cap ( 6 ), which is a twisting of the cap ( 6 ) relative to the spring retainer ( 5 ) prevented. Fastening device ( 1 ) according to one of the preceding claims, characterized in that the holder ( 3 ) at least one stop ( 19 ), which determines the maximum axial mobility of the cap ( 6 ) relative to the spring retainer ( 5 ) limited. Method for releasably attaching a component to a vehicle part ( 2 ) with a fastening device ( 1 ) according to one of claims 1 to 8, comprising the following method steps: - fixing the holder ( 3 ) on the vehicle part ( 2 ); - screwing in the screw ( 8th ) in the holder ( 3 ); - Introducing pin ( 4 ); - turning the screw ( 8th ) by a maximum of one revolution, the bolt ( 4 ) in the axial direction relative to the spring seat ( 5 ), and the cap ( 6 ) in the opposite axial direction relative to the spring receiver ( 5 ) and against the spring element ( 7 ) spring force (F) is driven, so that the spring element ( 7 ) and thereby the bolt ( 4 ) by means of the spring force (F) in the axial direction in the holder ( 3 ) is held. Method for fastening a component according to claim 9, characterized in that the screw ( 8th ) before attaching the bracket ( 3 ) on the vehicle part ( 2 ) in the holder ( 3 ) is screwed in, so that the holder ( 3 ) together with the screw ( 8th ) forms an assembly.

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