DE202018107343U1 - tension spring - Google Patents

Abstract

Tension spring arrangement (1) consisting of a tension spring element (7) or two tension spring elements (7, 8) arranged one inside the other, which are provided with a termination device (4) in spring end regions (2), characterized in that the one or both tension spring elements (7, 8) at at least one of their Federendbereiche (2) have an extension of the spring lying substantially in the rest position spring coils, wherein after the extension end turns (3) of the tension spring elements (7, 8) remain in their original training, and that above the Area of extension of the spring coils is a connection between the tension spring elements (7, 8) and the termination device (4).

Description

The invention relates to a Zugfederanordnung, which consists of one or two mutually arranged Zugfederelementen, which are provided at least one of their Federendbereiche with a termination device.

An end fastening device for a tension spring element, and a tension spring element with an end fastening device in an embodiment as a connecting element, for end-use in an inner diameter of a spiral or helical tension spring element is the DE 20 2018 102 226 U1 refer to. In this case, the part of the connecting piece which penetrates into the tension spring element is arranged behind an end region of the tension spring element which has a smaller inner diameter of the tension spring element than the remaining inner region. In this case, the located within the tension spring element end portion of the connecting piece is equipped with a holding portion whose width is matched to the inner diameter of the tension spring element.

Tension spring elements are used in industry for a wide variety of uses. Therefore, it is important, end of the tension spring elements, at least on one side to create in the end region of the possibility to apply by means of a termination device, the tension spring element with tensile forces. For this it is necessary that between the tension spring element and the terminating device to be used a non-positive and positive connection is performed.

The object of the invention is to provide a tension spring arrangement in conjunction with a closure device which is easy to assemble and, moreover, can transmit high forces when the tension spring element is loaded.

The object of the invention is solved by the features of claim 1. The features of claim 9 reproduce a termination device for use with one or two tension spring elements arranged inside one another.

The subordinate to the claims 1 and 9 subordinate claims give a further embodiment of the inventive concept again.

The present invention solves the stated object in such a way that the end region of the tension spring element to change so that an extension of the otherwise closely adjacent turns of the tension spring element is carried out in a very limited range. In this case, the stretching of the turns is carried out in such a way that, in the end, even in the same geometry in which the tension spring element is designed as a whole, a few turns remain intact. In the draw region, the adjacent turns which are pulled apart in the manufacturing process, a part of a termination device is introduced by means of supports such that the turns in the extension region of the tension spring element are virtually hooked to the supports. Such entanglement ensures that only the tensile forces exerted on such a tension spring arrangement are also introduced directly into the turns of the tension spring element.

Further, the termination device, which consists of two halves, can have spreads on each of the halves, which are arranged above the supports. These spreads are like the supports matched to the diameter of the spring element used. Thus, a position assurance of the two halves of the termination device for the end region of the normal turns of the tension spring element is given.

The terminating device preferably consists of two side pieces, of which only one can be provided with the supports and one of these side pieces can have no support. The side pieces are put together after assembly to the tension spring element and positively and positively connected with each other. Such a connection can be carried out by hooking or screwing or riveting or spot welding.

Such an embodiment of the assembly can be performed easily and requires no additional machinery for mounting.

The inventive concept, it is possible both individual tension springs or duplex tension springs, which consist of two nested Zugfederelementen end to provide each other permanently with different termination devices.

The termination device can be provided with hooks, rollers, screw holes or the like.

• 1 Eine Ausführung einer Zugfederanordnung mit endseitig montierten Abschlussvorrichtungen in einer perspektivischen Darstellung;
• 2 wie 1, jedoch in einer Seitenansicht;
• 3 wie 2, jedoch in einer Vorderansicht;
• 4 eine Detaildarstellung eines Ausschnittes gemäß einem Detail B nach 3;
• 5 eine Detaildarstellung eines Details A gemäß 1;
• 6 eine Detaildarstellung gemäß Detail C nach 1;
• 7 eine Explosionszeichnung einer Zugfederanordnung mit zwei ineinander angeordneten Zugfederelementen.

The invention will be described with reference to a schematically illustrated in the drawings possible embodiment.

• 1 An embodiment of a tension spring assembly with end mounted end devices in a perspective view;
• 2 as 1 but in a side view;
• 3 as 2 but in a front view;
• 4 a detailed representation of a section according to a detail B after 3 ;
• 5 a detailed representation of a detail A according to 1 ;
• 6 a detailed representation according to detail C after 1 ;
• 7 an exploded view of a tension spring assembly with two spring elements arranged inside one another.

A tension spring arrangement 1 with each at their end areas 3 arranged termination devices 4 , give the 1 again. In the exemplary embodiment, the tension spring arrangement consists of two individual tension springs 7 . 8th , which are arranged as duplex springs into each other. The same embodiment of the tension spring arrangement 1 can from different viewing directions the 2 and 3 also be taken.

In the embodiment, an outer tension spring element are arranged one inside the other 7 and therein an inner tension spring element 8th , The following description refers to such a duplex version of the tension spring assembly. However, it is possible in the same way, only a tension spring element with the end-side termination devices 4 perform. Further, in the embodiment, the termination devices 4 with a rotatable roller 9 executed. Instead of the roller arrangement, it is possible to carry out here any kind of fastening means, such as hooks, eyes or the like.

The termination device 4 consists essentially of two side pieces 5 , The exemplary embodiment of the termination device 4 with the role 9 can he 7 to be taken in detail. In the upper area have the side pieces 5 beading 14 on that from a bore 13 are permeated. The beads 14 are simultaneously used to the role 9 after assembly between the side pieces 5 by means of an axle element 6 via an axle hole 12 in the role 9 rotatably store.

Following the upper part of the termination device 4 is an offset 10 shown, the dimensions of which after the execution of the role 9 judge. Following the offset 10 is a holding area 11 available. About a crank 15 involved in joining the side pieces 5 into a breakthrough 16 engages, the holding area is created. The cohesion is through the axle 6 achieved.

As the embodiment of 7 it can be seen, are the two side pieces 5 not as identical parts. However, this is also possible within the meaning of the invention without further notice. So has the left side piece in the 7 within the holding area 11 at its end supports 17 and above it spreads 18 executed. The spreads 18 are also on the right side piece 5 in the area of the holding area 11 according to the 7 available.

To a permanent non-positive and positive connection between the connection device 4 and in the embodiment of the two tension spring elements 7 and 8th to reach, have the tension spring elements 7 and 8th before their final turns 3 an extension of the respective spring coils. This stretching is carried out during the manufacturing process so that the end turns 3 quasi spaced to the other adjacent turns of the tension spring elements 7 . 8th are executed.

After joining the side pieces 5 like it 4 it can be seen, protrude the shots 17 from the outer diameter into the inner region of the tension spring elements 7 and 8th into it.

Thus come on the supports 17 in the area of the stretching of the turns these on the supports to plant. The area of the end turns 13 is due to a partial positive fit of the two side pieces 5 existing spreads 18 hedged.

From the detailed representations A and C, the above-described installation of the termination device can be 4 by means of the side pieces 5 for both the upper and lower portions of the tension spring assembly 1 according to 1 remove.

Such a termination device 4 Can be easily and quickly mounted, thus providing a safe product of a tension spring assembly that can be exposed to high loads.

The side pieces 5 the termination device 4 are preferably industrially manufacturable from a flat material in a stamping and bending process.

LIST OF REFERENCE NUMBERS

1

tension spring

2

Federendbereich

3

end turns

4

termination device

5

counterpart

6

axle

7

Outer tension spring element

8th

Inner tension spring element

9

role

10

offset

11

holding area

12

axle bore

13

drilling

14

Beading

15

cranked

16

breakthrough

17

In stock

18

abduction

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 202018102226 U1 [0002]

Claims (11)

Tension spring arrangement (1) consisting of a tension spring element (7) or two tension spring elements (7, 8) arranged one inside the other, which are provided with a termination device (4) in spring end regions (2), characterized in that the one or both tension spring elements (7, 8) at at least one of their Federendbereiche (2) have an extension of the spring lying substantially in the rest position spring coils, wherein after the extension end turns (3) of the tension spring elements (7, 8) remain in their original training, and that above the Area of extension of the spring coils is a connection between the tension spring elements (7, 8) and the termination device (4). Tension spring arrangement according to Claim 1 , characterized in that the closure device (4) consists essentially of two identically designed or unequally shaped side pieces (5), wherein the side pieces (5) respectively holding portions (11), and that at least one of the side pieces (5) with supports ( 17) is provided. Tension spring arrangement according to Claim 2 , characterized in that the supports (17) of the geometry of the tension spring element (7, 8) are adapted and have webs which penetrate in the region of the extension of the / of the tension spring element (7, 8) and on which the turns of the or the tension spring elements (7, 8) come to rest. Tension spring arrangement according to one of the preceding claims, characterized in that the side pieces (5) are formed with spreaders (18) in the holding area (11), which are matched to the outer region of the tension spring element (7) and wrap around this area. Tension spring arrangement according to one of the preceding claims, characterized in that the side pieces (5) with each other after assembly with the or the tension spring elements (7, 8) are positively and positively connected. Tension spring arrangement according to Claim 5 , characterized in that the side pieces (5) can be hooked together, screwed or riveted or punktschweißbar. Tension spring arrangement according to one of the preceding claims, characterized in that the side pieces (5) are formed as stamped and bent parts. Tension spring arrangement according to one of the preceding claims, characterized in that the connection device (4) is provided with a roller (9) or a hook or a screw connection. Closing device (4), essentially consisting of two identical or dissimilar mutually connectable side pieces (5) which abut each other in the mounted state in holding areas (11), wherein at least one of the holding areas (11) with supports (17) for connection to at least one of Tension spring elements (7, 8) is provided. Closing device after Claim 9 , characterized in that the holding portion (11) engages in a part of at least one of the tension spring elements (7, 8), wherein the region of the engagement is achieved by a permanent extension of the spring coils adjacent to each other in the rest state. Termination device after the Claims 9 or 10 , characterized in that the side pieces (5) after assembly with the or the tension spring elements (7, 8) are mutually positively and positively connectable.

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