DE3525865C1

DE3525865C1 - Holding device for holding a threaded bolt

Info

Publication number: DE3525865C1
Application number: DE3525865A
Authority: DE
Inventors: Willibald 6718 Grünstadt Kraus
Original assignee: TRW United Carr GmbH and Co
Current assignee: TRW United Carr GmbH and Co
Priority date: 1985-07-19
Filing date: 1985-07-19
Publication date: 1986-08-28

Abstract

The invention relates to a holding device 3 for holding a threaded bolt, especially a coarse-threaded bolt, in an opening 2 in a plastic part 1, having at least one or more elastic latching tabs 4 which are distributed over the circumference of the opening 2. In this case, the latching tabs 4 are provided with steps 5 in the engagement region 7 with the thread of the bolt. These steps are matched to the pitch of the thread of the threaded bolt. <IMAGE>

Description

Nach F i g. 1 weist ein Kunststoffteil 1 mit einer Öffnung 2 eine Halteeinrichtung 3 auf. Diese Halteeinrichtung 3 besteht im wesentlichen aus über den Umfang der Öffnung 2 verteilten elastischen Rastnasen 4. Im Eingriffsbereich 7 dieser Rastnasen mit dem in F i g. 2 schematisch dargestellten Gewinde 10 eines Grobgewindebolzens weisen die elastischen Rastnasen 4 Abstufungen 5 auf. Diese Abstufungen sind der Steigung des Gewindes 10 des Grobgewindebolzens 9 angepaßt. Wie aus F i g. 2 ersichtlich, verkeilen sich durch diese speziell gestalteten Abstufungen 5 der elastischen Rastnasen 4 diese mit dem Gewindebolzen 9, so daß eine erhöhte Abzugskraft erreicht wird. Andererseits ergibt sich eine schnelle und einfache Montage, da beim Einschrauben bzw. Aufschlagen die Abstufungen der elastischen Rastnasen 4 dem Gewinde 10 des Grobgewindebolzens keinen nennenswerten Gegenstand entgegenstellen. Wie aus F i g. 1 und 3 ersichtlich, sind jeweils zwei Rastnasenpaare einander gegenüberliegend angeordnet. Zwischen diesen Rastnasenpaaren 4 sind Führungsstege 8 vorgesehen, welche sich durch die gesamte Öffnung 2 erstrecken und zur Zentrierung des Gewindebolzens 9 dienen. According to FIG. 1 has a plastic part 1 with an opening 2 Holding device 3 on. This holding device 3 consists essentially of over the circumference of the opening 2 distributed elastic locking lugs 4. In the engagement area 7 of these locking lugs with the one shown in FIG. 2 schematically illustrated thread 10 of a With the coarse thread bolt, the elastic latching lugs have 4 gradations 5. These gradations are adapted to the pitch of the thread 10 of the coarse thread bolt 9. As from F i G. 2 can be seen wedged by this specifically designed Graduations 5 of the elastic locking lugs 4 this with the threaded bolt 9, so that an increased pull-off force is achieved. On the other hand, there is a fast and easy assembly, because when screwing in or knocking on, the gradations of the elastic Latching lugs 4 the thread 10 of the coarse thread bolt no significant object oppose. As shown in FIG. 1 and 3, there are two pairs of locking lugs each arranged opposite one another. Between these pairs of locking lugs 4 are guide webs 8 provided, which extend through the entire opening 2 and for centering of the threaded bolt 9 are used.

Nach F i g. 4 besteht auch die Möglichkeit, statt zwei Abstufungen drei Abstufungen vorzusehen, wodurch eine weitere Verkeilung der elastischen Rastnasen mit dem Gewinde 10 eines Grobgewindebolzens 9 bewirkt wird. According to FIG. 4 it is also possible to use two levels instead of two Provide three gradations, whereby a further wedging of the elastic locking lugs is effected with the thread 10 of a coarse thread bolt 9.

Die Rastnasen 4 sind vorzugsweise im Bereich eines konischen Einlaufs 6 der Öffnung 2 angeordnet, d. h. The locking lugs 4 are preferably in the area of a conical inlet 6 of the opening 2, d. H.

schließen an diesen konischen Einlauf an. Damit treten beim Einschrauben bzw. Aufschlagen eines Gewindebolzens die Abstufungen 5 der elastischen Rastnasen sofort in Funktion und führen zu einer sehr guten Halterung des Kunststoffteils 1 an den Grobgewindebolzen 9, wobei dieser Bolzen auch mit einer Oberfläche versehen sein kann, z. B. PVC oder Lack.connect to this conical inlet. So that when screwing in or knocking on a threaded bolt, the graduations 5 of the elastic locking lugs immediately in function and lead to a very good retention of the plastic part 1 to the coarse thread bolt 9, this bolt also being provided with a surface can be, e.g. B. PVC or paint.

Bei der Ausführungsform nach Fig. 5 weist das Kunststoffteil 1 mehrere, mit den Abstufungen 5 versehene Rastnasenpaare 4 und 4' auf, welche im Abstand in Öffnungslängsrichtung hintereinander angeordnet sind. In the embodiment according to FIG. 5, the plastic part 1 has several with the gradations 5 provided locking lug pairs 4 and 4 ', which at a distance in Are arranged one behind the other in the longitudinal direction of the opening.

Zwischen den Rastnasenpaaren 4 und 4' befindet sich ein konischer Einlauf 6', welcher analog dem konischen Einlauf 6 ausgebildet ist. Diese Ausführungsform ist besonders zur Halterung langer Grobgewindebolzen 9 geeignet und führt zu einer erheblichen Erhöhung der Abzugskraft. Aus Fig. 7 ist ersichtlich, daß bei dieser Bauform insgesamt acht Rastnasen Anwendung finden, welche sich einander gegenüberliegen und damit die vorgenannten Rastnasenpaare bilden. Durch diese Konstruktion können die in F i g. 3 dargestellten Führungsstege 8 entfallen, da durch die große Anzahl der elastischen, mit den Abstufungen 5 versehenen Rastnasen 4 der eingeschraubte, bzw. aufgeschlagene Bolzen eine genügende Führung erfährt. Hierbei sind z. B. die unteren Rastnasenpaare 4 gegenüber den oberen Rastnasenpaaren 4' um 45" versetzt. (F i g. 7).There is a conical one between the pairs of locking lugs 4 and 4 ' Inlet 6 ', which is designed analogously to the conical inlet 6. This embodiment is particularly suitable for holding long coarse-threaded bolts 9 and leads to a significant increase in pull-off force. From Fig. 7 it can be seen that in this Design a total of eight locking lugs are used, which are opposite each other and thus form the aforementioned pairs of locking lugs. With this construction you can the in F i g. 3 shown guide webs 8 are omitted because of the large number the elastic, with the gradations 5 provided locking lugs 4 the screwed, or open bolts experience sufficient guidance. Here are z. B. the lower pairs of locking lugs 4 with respect to the upper pairs of locking lugs 4 'offset by 45 ". (Fig. 7).

Bei dem Ausführungsbeispiel nach Fig. 6 weisen die einander gegenüberliegenden Rastnasen 4 wiederum jeweils zwei Abstufungen 5 auf. Diese Abstufungen 5 sind ebenfalls im Eingriffsbereich 7 des Grobgewindebolzens angeordnet. Hier sind jedoch die Abstufungen länger ausgebildet als bei der Bauform nach F i g. 1, d. h. In the embodiment according to FIG. 6, the mutually opposite Latching lugs 4 in turn have two gradations 5 each. These gradations 5 are also arranged in the engagement area 7 of the coarse thread bolt. Here are the gradations, however longer than in the design according to FIG. 1, d. H.

diese Konstruktion läßt sich für Grobgewindebolzen mit sehr großen Steigungen verwenden.this construction can be used for coarse thread bolts with very large Use inclines.

Fig.8 zeigt eine Ausführungsmöglichkeit an einer Rohrhalterung 1'. Diese Rohrhalterung 1' weist eine zentrische, durchgehende Öffnung 2 auf, in welcher die erfindungsgemäße Halteeinrichtung 3 mit den einander gegenüberliegenden Rastnasen 4 angeordnet ist. Diese Rastnasen 4 sind in vorbeschriebener Weise mit Abstufungen 5 versehen und befinden sich anschließend des konischen Einlaufs der Öffnung 2. FIG. 8 shows a possible embodiment on a pipe holder 1 '. This pipe holder 1 'has a central, through opening 2 in which the holding device 3 according to the invention with the opposing locking lugs 4 is arranged. These locking lugs 4 are graded in the manner described above 5 and are then located at the conical inlet of the opening 2.

Allen Ausführungsformen ist gemeinsam, daß elastische Rastnasen 4 bzw. 4' Anwendung finden, deren Flexibilität eine Erleichterung der Montage gewährleistet. All embodiments have in common that elastic latching lugs 4 or 4 'application, the flexibility of which ensures ease of assembly.

Im Eingriffsbereich 7 der elastischen Rastnasen 4 sind zwei oder mehrere Abstufungen 5 vorgesehen, welche vorzugsweise auf die Gewindesteigung eines Gewindebolzens 9 abgestellt sind. Diese Abstufungen dienen im Zusammenwirken mit der federnden Gestaltung der Rastelemente 4 zur Verkeilung an dem Gewinde 10 des Grobgewindebolzens 9. Bei der Ausführungsform nach Fig. 1,2 und 3 sind vier Rastnasen einander gegenüberliegend angeordnet, wobei jeweils zwischen diesen Rastnasen 4 Führungsstege 8 verlaufen. Diese Führungsstege 8 können sich durch das gesamte Kunststoffteil 1 erstrecken und bewirken eine Führung und Zentrierung des eingeschraubten Bolzens.In the engagement area 7 of the elastic latching lugs 4 there are two or more Graduations 5 provided which preferably on the thread pitch of a threaded bolt 9 are turned off. These gradations are used in conjunction with the resilient Design of the locking elements 4 for wedging on the thread 10 of the coarse-threaded bolt 9. In the embodiment according to FIGS. 1, 2 and 3, four locking lugs are opposite one another arranged, with 4 guide webs 8 running between these locking lugs. These guide webs 8 can extend through the entire plastic part 1 and cause the screwed-in bolt to be guided and centered.

Die Erfindung läßt sich überall dort einsetzen, wo über Gewindebolzen, vorzugsweise Grobgewindebolzen, Kunststoffteile gehaltert werden, beispielsweise gemäß F i g. 8 für Bremskraftstoffleitungen, oder Isoliermattenbefestigung, Teppichbefestigung usw. Weiterhin ist durch die spezielle Gestaltung die erfindungsgemäße Halteeinrichtung sehr gut für die automatische Zuführung, d. Ii. für Industrieautomaten, geeignet, d. h. das Aufschlagen auf den betr. Bolzen kann z. B. automatisch erfolgen. The invention can be used anywhere where threaded bolts, preferably coarse-threaded bolts, plastic parts are supported, for example according to FIG. 8 for brake fuel lines, or insulation mat attachment, carpet attachment etc. Furthermore, the holding device according to the invention is due to the special design very good for automatic feed, d. Ii. for industrial machines, suitable, d. H. the impact on the relevant bolt can z. B. be done automatically.

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Claims

Claims: 1. Holding device for holding a threaded bolt, in particular coarse thread bolt, in an opening of a plastic part, with at least one or more elastic locking lugs distributed over the circumference of the opening, d a d u r c h g e - indicates that the locking lugs (4) in the engagement area (7) with the thread of the bolt (9) are provided with steps (5).

2. Holding device according to claim 1, characterized in that the gradations (5) are adapted to the thread pitch of the threaded bolt (9).

3. Holding device according to claim 1 and 2, characterized in that that two stepped locking lugs (4) are opposite each other.

4. Holding device according to one of the preceding claims, characterized characterized in that each locking lug (4) has at least two gradations (5).

5. Holding device according to one of the preceding claims, with conical inlet of the opening of the plastic part, characterized in that the Latches (4) with their gradations (5) on the conical inlet (6) of the opening (2) connect.

6. Holding device according to one of the preceding claims, characterized characterized in that several latching lug pairs (4, 4 ') are arranged one behind the other at a distance in the longitudinal direction of the opening.

7. Holding device according to one of the preceding claims, characterized characterized in that the opening (2) between the stepped pairs of locking lugs (4) has guide webs (8) extending in the longitudinal direction.

The invention relates to a holding device for holding a threaded bolt, in particular a coarse threaded bolt, in an opening of a plastic part, with several elastic locking lugs distributed over the circumference of the opening.

As the state of the art, it is generally already known in this regard Let locking lugs be directed diagonally against the threaded bolt to be screwed in, with After screwing in the threaded bolt, the end faces of the elastic locking lugs Apply to the undersides of the threads. This holding effect can especially be Vibration loads, as they occur, for example, in motor vehicles, inadequate be, so that an additional security of the elements is often required.

In contrast, the object of the present invention is to provide a holding device to create of the type mentioned, which with a simple structure an improved Has holding effect, d. H. the pull-off force which is applied to a screwed in or if the bolt is open, it should be increased.

This object is achieved according to the invention in that the locking lugs are provided with gradations in the area of engagement with the thread of the bolt. By these gradations have the advantage that the locking lugs with the threaded bolt Wedge, so that an increase in the pull-off force is achieved.

In a further embodiment of the invention, the Graduations of the The thread pitch of the threaded bolt can be adapted, with two graded each Latches are opposite. Each of these locking lugs can, for example, have two levels exhibit; However, there is also the option of three or more gradations a locking lug to be provided.

In the case of a holding device with a conical inlet of the opening of the In a further embodiment of the invention, the latching lugs can be their plastic part Connect gradations to the conical inlet of the opening. This results in in addition to a simple structural design, a very good holding effect on the screwed-in Threaded bolt and such a guiding function.

According to another feature of the invention, several, with the Graduated locking lugs at a distance in the opening longitudinal direction one behind the other be arranged. This arrangement advantageously causes a additional increase of the holding force is achieved especially with long threaded bolts.

According to another feature of the invention, the opening between the stepped pairs of locking lugs have guide webs running in the longitudinal direction; precise centering of the bolt is achieved by means of these guide webs.

Elastic plastic elements provided with teeth already count to the state of the art (DE-OS 30 11121; DE-GM 6934480)., These toothed elements however, they work with other plastic parts, for example the tab of a cable connection element together, so here is a fundamental difference between these gears and the gradations of the present invention. The gradations according to of the present invention act with the threads of a threaded bolt, specifically a coarse thread bolt, together, creating a wedging with the individual Threads results.

The invention is illustrated below with reference to in the drawing Embodiments described in more detail. In the drawing, Fig. 1 shows a section according to the line I-I in Fig. 3; F i g. 2 shows a construction according to FIG. 1 with partially screwed in or knocked on threaded bolt; Fig. 3 is a plan view of the Plastic part according to FIG. 1; F i g. 4 another embodiment of the present one Invention; F i g. 5 shows another embodiment of the present invention locking lug pairs arranged one behind the other; F i g. 6 another option of the invention in side cut; F i g. 7 is a plan view of the embodiment according to Figure 5; F i g. 8 shows an application of the holding device according to the invention with a pipe bracket.