DD267538A1

DD267538A1 - CLAMP AND SCREW CONNECTION

Info

Publication number: DD267538A1
Application number: DD30906187A
Authority: DD
Inventors: Roland Dallendoerfer; Werner Baumgaertel
Original assignee: Hermsdorf Keramik Veb
Priority date: 1987-11-16
Filing date: 1987-11-16
Publication date: 1989-05-03

Abstract

Die Klemm- und Schraubverbindung weist eine Schraube und ein mit einem Loch versehenes plattenfoermiges Teil auf, in das eine Schraube einfuehrbar ist und dessen kleinster Durchmesser kleiner als der Schraubenkerndurchmesser ist. Ziel und Aufgabe bestehen in der Schaffung einer Verbindung zweier Bauteile, die einfach und sicher wirkt und schnell herstellbar ist. Erreicht wird eine solche Verbindung, indem in das Loch vorzugsweise drei ueber den Umfang gleichmaessig verteilte federnde Lappen hineinragen, deren freie Enden den kleinsten Durchmesser des Loches bestimmen und deren Breiten gleich oder kleiner sind als die zwischen ihnen befindlichen Lochteile. Loch und Lappen entstehen durch Stanzen. Fig. 1The clamping and screw connection has a screw and a plate-shaped part provided with a hole into which a screw can be introduced and whose smallest diameter is smaller than the screw core diameter. Goal and task consist in the creation of a connection between two components, which is simple and safe and can be produced quickly. Such a connection is achieved by protruding into the hole preferably three circumferentially uniformly distributed resilient lobes whose free ends determine the smallest diameter of the hole and whose widths are equal to or smaller than the hole parts located between them. Hole and cloth are created by punching. Fig. 1

Description

-2- 267 Ausführungsbeisplel Die Erfindung wird nachstehend anhand der schematischen Zeichnung näher erläutert. Es zeigen:The invention will be explained in more detail below with reference to the schematic drawing. Show it:

Fig. 1: ein Ausführungsbeispiel einer erfindungsgemäßen Verbindung im Aufrißschnitt und Fig. 2: ein Einzelteil dor Fig. 1 in Draufsicht.Fig. 1: an embodiment of a compound according to the invention in elevation and Fig. 2: an item dor Fig. 1 in plan view.

In den Figuren 1 und 2 ist in ein Bauteil 1 mit einer mehrschulterigen Ausnehmung 2 ein plattenförmiges Stanzteil 3 eingelegt, das mit einer Ausnehmung 4 für eine an einer Schulter 5 vorgesehene Rastnase 6 und mit einem Loch 7 versehen ist, in das drei federnde Lappen 8 hineinragen. Zwischen den um 12O⁰C versetzten Lappen 8 sind Zwischenräume 9 vorgesehen, die breiter sind als die Lappen 8. Die Lappen 8 legen eine wirksame öffnung 10 fest, durch die eine Schlitzschraube 11 hindurchragt, deren Kerndurchmesser D geringfügig (z. B. 10%) größer ist als der Durchmesser d dar öffnung 10. Befindet sich die Schraube 11 nicht in der Öffnung 10, so liegen die federnden Lappen 8 in einer Ebene, die mit der Ebene des Stanzteiles 3 identisch ist. Zwischen dem Kopf der Schraube 11 und der Schulter 5 sind ein Kontaktblech 12 und zwei Anschlußdrähte (Leitungen) 13vorgesehen,die durch die Schraube 11 gegen das mit dem Bauteil 1 fest verbundene Kontaktbiech 12 gedrückt werden. Das Kontaktblech 12 stützt sich dabei gegen die Schalter 5 und das Stanzteil 3 ab.In Figures 1 and 2, a plate-shaped stamped part 3 is inserted in a component 1 with a multi-shouldered recess 2, which is provided with a recess 4 for a provided on a shoulder 5 locking lug 6 and a hole 7, in the three resilient tabs. 8 protrude. Between about 12O ⁰ C staggered tabs 8 gaps 9 are provided, which are wider than the flap 8. The flap 8 create an effective opening 10 determines through which a slotted screw 11 protrudes, with a core diameter D slightly (eg., 10% ) is greater than the diameter d of the opening 10. If the screw 11 is not in the opening 10, the resilient tabs 8 lie in a plane which is identical to the plane of the stamped part 3. Between the head of the screw 11 and the shoulder 5, a contact plate 12 and two connecting wires (lines) 13 are provided, which are pressed by the screw 11 against the firmly fixed to the component 1 Kontaktbiech 12. The contact plate 12 is supported against the switch 5 and the stamped part 3 from.

Beim Gebrauch wird die Schraube 11 durch die öffnung 10 zwischen den Lappen 8 gedrückt, bis sich die Unterfläche des Kopfes der Schraube 11, die Anschlußdrähte 13, das Kontaktblech 12 und die Lappen 8 berühren. Dabei werden die federnden Lappen 8 beiseite gedrückt, gespreizt und ihre vorderen Enden kommen an Gewindegärgen 14 der Schlitzschraube 11 zur Anlage. Durch Drehen der Schraube 11 mit einem Schraubendreher um 12O⁰C stützen sich die vorderen Flächen 15 am freien Ende der Lappen 8 gegen die Gewindegänge 14 ab.In use, the screw 11 is pushed through the opening 10 between the flaps 8 until the bottom surface of the head of the screw 11, the lead wires 13, the contact plate 12 and the tabs 8 touch. In this case, the resilient tabs 8 are pushed aside, spread and their front ends come to Gewindegärgen 14 of the slotted screw 11 to the plant. By turning the screw 11 with a screwdriver to 12O ⁰ C, the front surfaces 15 are supported at the free end of the lobes 8 against the threads 14.

Die federnden Lappen 8 sind steif genug, um den auf ihre vorderen Flächen 15 durch die Schraube 11 ausgeübten Druck ohne merkliche Deformation aufzunehmen. In dieser Stellung besteht der gewünschte sichere Kontakt zwischen dem Kontaktblech 12 und den Anschlüssen 13, der nur durch das an sich bekannte Herausdrehen der Schraube 11 aus der Öffnung 10 unterbrochen werden kann.The resilient tabs 8 are stiff enough to receive the pressure applied to their front surfaces 15 by the screw 11 without noticeable deformation. In this position, the desired secure contact between the contact plate 12 and the terminals 13, which can be interrupted only by the known per se unscrewing the screw 11 from the opening 10.

Claims

1. Clamping and screwing device with a screw and provided with a hole plate-shaped part into which the screw is inserted and whose smallest hole diameter is smaller than the core diameter of the Sc!. 'a, characterized in that protrudes into the hole at least one resilient lobe whose free end determines the smallest diameter of the hole and whose width is smaller than the width of the peripherally adjoining hole parts.

2. clamping and screw connections according to claim 1, characterized in that three resilient tabs, regularly distributed over the hole circumference, are arranged.

3. clamping and screw connection according to claim 2, characterized in that hole and lobes of the plate-shaped part are punched out.

For this 1 page drawings

Field of application of the invention

The invention relates to a clamping and screw connection with '.finer screw and provided with a hole plate-shaped part into which the screw is inserted and whose smallest diameter is smaller than the core diameter of the screw. Such clamping and screw connections can be used anywhere where two or more components are to be detachably connected to each other, in particular in the installation technology, where electrical cables are to be connected to switches and sockets.

Characteristic of the known state of the art

For fastening electrical cables in switches and sockets both screw and clamping or locking connections are common (DE-PS 3044134). The screw connections are versatile and can be used under almost all conditions. You will need a considerable amount of time or tools to assemble. The clamp connections reduce this effort. They are not usable under all conditions and materials. The Rastverbindungsn usually require complicated installation equipment and connections. There are also Blecl imuttern known for connecting sheet metal parts, which thread embossments on the through hole or r ~ \ Durchgangslöchern are common (DE-OS 3121771). At least one of the thread embossings can be designed to be resilient and thus secures the maintenance of the associated screw in the sheet metal nut. Also in the case of the use of sheet metal nuts, the screws are time-consuming or tool-consuming screwing.

Object of the invention

The invention seeks to eliminate the Mängol shown and create a quick and easy-to-operate, secure clamping-screw connection, which has a wide range of applications.

Explanation of the essence of the invention

The invention has for its object to design a clamping-screw connection so that it combines strength and safety of the screw connection of two components with the rapid operation of a clamping without taking over their disadvantages.

According to the invention, this object is achieved in that protrudes into the hole at least one resilient lobe whose free end determines the smallest diameter of the hole and the width of which is smaller than the width of the peripherally located next to the lobe hole parts. In the simplest case, the flap is made of the same material as the plate-shaped, resilient part and is itself a piece of this. In this way it is possible to push a screw into the hole until it stops and tighten by a maximum of one turn. The hole provided with the resilient flap in the plate-shaped part can be produced by punching. Instead of a flap can also be provided for the optimum support and securing the screw three regularly distributed over the hole circumference resilient whose widths are equal and / or smaller than the interstices separating them. In this case, less than half a turn of the screw is required to secure the screw in the maximum. By the invention, not only with metal parts, but generally with parts made of elastic materials, ζ. B. plastic, can be realized, the spreading effect of the flap located substantially in a plane is exploited and saved the stamping process for the otherwise usual thread.