DE102007039723A1 - Spring element, particularly in form of helical spring, has device for sound damping, where device has unit of spring element formed integrally with spring element, which is in active contact with unit of spring element - Google Patents

Abstract

The spring element has a device for sound damping. The device has a unit (8) of the spring element formed integrally with the spring element, which is in active contact with the unit of the spring element. The spring element has a helical spring (2) and device for noise damping is formed by the unit formed integrally with the coil spring, which is in active contact with winding of the coil spring.

Description

The Invention relates to a spring with a device for noise damping, in particular for use in a vehicle seat, according to the preamble of claim 1.

Spring elements, For example, in the form of coil springs, are available in many ways for vibration damping of machines and machine parts as well as restoring devices or for the production of Bias used. The disadvantage is that such spring elements even as a vibratory system with in disturbing Frequency range lying natural frequencies can act which lead to a disturbing noise development can.

By the DE 42 01 960 A1 is a spring arrangement for reducing structure-borne noise known. The considered spring arrangement in the form of a helical spring has, for the purpose of deliberate damping of vibrations in the audible structure-borne sound area in the direction of its longitudinal axis, a division into a plurality of individual, substantially resilient or oscillatable sections. The spring sections are arranged at their end points in each case directly connected by spring material and substantially rigid coupling elements such that the natural frequency of the individual spring sections is greater than the natural frequency of an uncoupled coil spring with the same number of spring connections. This design is intended to prevent the occurrence of disturbing resonances when the spring arrangement is excited in the respective application case, in which the degree of isolation or the passage insulation is considerably reduced for the frequency range in question.

By the DE 44 26 666 A1 is a device for damping spring oscillations in a tensioning device for a traction mechanism known. The tensioning device comprises a base part and a tensioning roller carrier, which are arranged partially concentric with one another, wherein a torsion spring that tensions these parts and is guided on a sleeve is used. To avoid a disadvantageous, often noise-causing spring oscillation of the torsion spring is provided between the sleeve and the inner diameter of the torsion spring an inner to the torsion spring-applied clamping bush having a longitudinal slot.

By the DE 10 2004 031 147 A1 For example, an elastic element comprising a coil spring and a damping element is known. The damping element is arranged in a recess of the coil spring and fixed by a press fit in the coil spring. The damping element is intended to dampen the spring vibrations and thus prevent the transmission of vibrations to adjacent components and disturbing noise.

Furthermore It is known to suppress the noise a coil spring this with a wrap of a plastic tape to provide for the formation of noise-generating natural oscillations to prevent the coil spring.

All known from the prior art spring elements with a device for noise reduction are two-part systems, d. H. that in addition to the spring element, for example. To the coil spring, a separate part for damping natural oscillations of the Spring element is provided.

The Object of the present invention is a spring element of the aforementioned type so that without additional damping element a sufficient noise attenuation can be achieved.

These The object is achieved by the invention according to claim 1 solved.

advantageous and appropriate further training of the task solution are given in the subclaims.

The inventive task solution proposes before, one integrated into the spring element, in one piece or in one piece formed with the spring element component for noise reduction provided.

Of the Advantage of the inventive solution Task is that the desired noise damping only with one, integrally formed with the spring element component is achievable, resulting in a cost savings in the production and above all, a simplification of the assembly results, as the Mounting an additional damping element eliminated.

The Invention will be described below with reference to the attached drawing, in which an embodiment is shown, closer be explained.

It shows

1a , b and c an inventively formed coil spring in the relaxed state in a perspective, and two side views and

2 the coil spring after 1 in mounted tensioned state in a side view.

Same and corresponding components le are provided in the figures of the drawing with the same reference numerals.

The drawing shows a spring element in the form of a spring coils 3 having coil spring 2 whose two end spring coils 4 . 6 are designed as fastening hooks or fastening loops.

The end of at least one end-side spring coil 4 or 6 the coil spring 2 is with an extension 8th provided in the axial direction of the coil spring 2 extends. The extension 8th is inside the helical part 10 the coil spring 2 arranged and biased inside at least one spring coil, in the drawing on all spring coils 3 at.

The 1 shows the coil spring 2 in the relaxed state and the 2 shows the coil spring in the assembled state, in which the coil spring is stretched.

The coil spring 2 can also be designed so that the extension 8th on the outside of at least one spring coil or on all spring coils 3 biased applied.

The inventively designed coil spring 2 is excellently suited for spring preloading of levers provided in the area of vehicle seats.

2

coil spring

3

spring coils

4

end-side spring coil

6

end-side spring coil

8th

renewal

10

helically part

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4201960 A1 [0003]
• - DE 4426666 A1 [0004]
• DE 102004031147 A1 [0005]

Claims (7)

Spring element with a device for noise damping, characterized in that the device by at least one piece or, integrally with the spring element ( 2 ) trained part ( 8th ) of the spring element ( 2 ) is formed, which is in operative contact with at least a part of the spring element. Spring element according to claim 1, characterized in that the spring element is a helical spring ( 2 ) and the device for noise damping by at least one integrally formed with the coil spring part ( 8th ) of the coil spring is formed, which is in operative contact with at least one spring coil of the coil spring. Spring element according to claim 2, characterized in that the part ( 8th ) inside and / or outside of the helical part ( 10 ) of the coil spring ( 2 ) is present. Spring element according to claim 2 or 3, characterized in that the part ( 8th ) of the coil spring ( 2 ) bears under pretension on the coil spring. Spring element according to claim 2, 3 or 4, characterized in that the part ( 8th ) of the coil spring ( 2 ) by an extension of at least one end coil spring coil ( 4 . 6 ) is formed. Spring element according to claim 5, characterized in that the at least one extension ( 8th ) in the coil spring longitudinal direction inside and / or outside of the coil spring ( 2 ) on at least one of the coil spring coils ( 3 ) is arranged adjacent. Spring element according to claim 5 or 6, characterized in that the at least one extension ( 8th ) under bias on at least one of the coil spring coils ( 3 ) is present.