DE102014013050B4 - Tilgeranordnung, method for producing a Tilgeranordnung and subframe with a Tilgeranordnung - Google Patents

Abstract

Tilgeranordnung (1), comprising a component to be damped (2) having an opening (3) in which a threaded nut (4) is held cohesively, and a damping mass (6) with a screwed into the threaded nut (4) screw the component (2) is fixed, characterized in that the opening (3) is not rotationally symmetrical and the threaded nut (4) has a head (4a) whose diameter is smaller than the smallest diameter of the opening (3), and a collar (4b), which has an undercut to the opening (3) in at least one blocking position, wherein the threaded nut (4) is held in the locking position cohesively in the opening (3) and wherein of the absorber mass (6) at least one pin (7) projects, which projects between the collar (4b) and the opening edge in the opening (3).

Description

The present invention relates to a Tilgeranordnung, comprising a component to be damped with an opening in which a threaded nut is held cohesively, and a damping mass, which is fixed with a screwed into the nut screw on the component, and a subframe for a vehicle with a such Tilgeranordnung and a method for producing such Tilgeranordnung.

Such Tilgeranordnungen be placed in the vehicle for targeted cancellation of unwanted vibrations to appropriate assemblies. The natural frequency of the absorber (also called vibration damper or mass filter) is tuned to the resonant frequency of the assembly to be eliminated. At this frequency, the module then performs only small oscillations. Acoustic examinations are usually made on prefabricated modules, which is why an absorber is often installed as a retrofit solution. With open profile sections or profiles that can be pierced, the attachment of a Tilgeranordnung is no problem. In a strength-relevant component with closed profile cross-section, however, the attachment of the Tilgeranordnung is problematic because the profile may not be significantly weakened for attachment.

The DE 19547714 A1 describes a vibration damper comprising an absorber mass, which is connected by a vulcanized spring body made of elastomeric material with a mounting flange having at least one anti-rotation, which is formed by a substantially cup-shaped, opposite to the absorber mass projecting bulge. In the bottom of the bulge at least one recess is arranged, which is formed as an injection port for injecting the elastomeric material of the spring body. The fastener is formed by a screw, the screw head between the mounting flange and the elastomeric material is secured. To attach such a vibration damper, the attachment structure needs a threaded hole or a welded nut. However, the risk of losing the absorber mass in the event of a welded joint failure is great.

The object of the present invention is therefore to provide a Tilgeranordnung, a subframe with a Tilgeranordnung, and a method for producing a Tilgeranordnung in which the absorber mass is secured against losing.

This object is achieved for a Tilgeranordnung by the features of claim 1.

An auxiliary frame with a Tilgeranordnung invention is claimed in claim 7.

A method for producing a Tilgeranordnung invention is claimed in claim 10.

A Tilgeranordnung comprises a component to be damped with an opening in which a threaded nut is held cohesively, and a damping mass which is fixed with a screwed into the nut screw on the component, wherein the opening is not rotationally symmetrical and the threaded nut has a head, the diameter of which is smaller than the smallest diameter of the opening, and a collar which has an undercut to the opening in at least one blocking position, wherein the threaded nut is held in the opening material fit in the opening and wherein at least one pin protrudes from the absorber mass , which protrudes between the collar and opening edge in the opening.

By holding the collar in the blocking position by the undercut in the opening and prevents the at least one pin leaving the locked position, the loss of the absorber mass can be avoided even in case of failure of the cohesive connection. The loose absorber mass is noticeable by a rattle noise and so the nut can be connected in a repair again cohesively with the component.

In a preferred embodiment of the absorber arrangement, the opening is formed as a slot. A slot is particularly easy to manufacture and meets the intended purpose without restrictions.

In a preferred embodiment of the absorber arrangement, the collar has a shape identical to the opening with a clearance fit. The complementary shape is chosen so that the collar of the threaded nut can be inserted without appreciable force in the opening and is still quickly bring in a rotation of the threaded nut in the locked position with undercut.

In a preferred embodiment of the Tilgeranordnung the threaded nut is welded in the blocking position with the component. The welding of the head and / or the collar of the threaded nut with the component is a simple and reliable way to set the nut in the opening. Furthermore, the weld gives the arrangement of threaded nut and component additional stability.

In a preferred embodiment of the Tilgeranordnung, the absorber mass has a through hole through which the screw is inserted. The absorber mass can be constructed so that an elastomeric body is vulcanized around a pipe. The tube thus forms the through hole through which the screw shaft is inserted. The screw head is supported on the absorber mass so that the absorber mass is pressed firmly against the component when tightening the screw with a corresponding torque.

In a preferred embodiment of the Tilgeranordnung protrude from the absorber mass from two pins that surround the collar in the locked position on both sides. Two pins improve the rotation in case of failure of the cohesive connection of the threaded nut to the component in addition.

A subframe for a vehicle has at least one Tilgeranordnung invention. The subframe preferably consists of two parallel spaced apart longitudinal members and at least one cross member connecting the longitudinal members, wherein the Tilgeranordnung is arranged on one of the longitudinal members. A subframe is fixedly or elastically disposed on the body of the vehicle and has the receiving points for the suspension arms and possibly the distribution differential.

In a preferred embodiment of the subframe, the longitudinal member forms a closed hollow profile. This is preferably realized by a hydroformed extruded aluminum or steel. The invention is particularly advantageous in longitudinal members made of closed hollow profiles, since they must not be weakened by too large recesses due to the high dynamic load. The labile cohesive connection of the threaded nut to the component in case of failure does not result in the heavy absorber mass falling on the road and causing damage. Rather, the absorber mass remains hanging in the opening and attracts attention by rattling noises.

• – Bereitstellen eines zu bedämpfenden Bauteils mit einer nicht-rotationssymmetrischen Öffnung;
• – Einführen einer Gewindemutter mit einem Kopf, dessen Durchmesser kleiner als der kleinste Durchmesser der Öffnung ist, und einem Kragen, der in zumindest einer Sperrstellung einen Hinterschnitt zu der Öffnung aufweist, in die Öffnung;
• – Drehen der Gewindemutter relativ zum Bauteil in die Sperrstellung;
• – Stoffschlüssiges Verbinden der Gewindemutter mit dem Bauteil;
• – Ansetzen einer Tilgermasse an die Gewindemutter, wobei von der Tilgermasse zumindest ein Pin absteht, der zwischen Kragen und Öffnungsrand in die Öffnung einragt;
• – Festlegen der Tilgermasse an dem Bauteil mit einer in die Gewindemutter eingedrehten Schraube.

A method for manufacturing a Tilgeranordnung according to the invention comprises the following steps:

• - Providing a component to be damped with a non-rotationally symmetrical opening;
• - Introducing a threaded nut with a head whose diameter is smaller than the smallest diameter of the opening, and a collar having an undercut to the opening in at least one locking position, in the opening;
• - Turning the threaded nut relative to the component in the blocking position;
• - Material connection of the threaded nut with the component;
• - Applying an absorber mass to the threaded nut, wherein protrudes from the absorber mass at least one pin which projects between the collar and the opening edge in the opening;
• - Determining the absorber mass on the component with a screw screwed into the threaded nut.

For the method, the preferred embodiments of the absorber arrangement can be used in an analogous manner.

Further details and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings.

Show:

1 a perspective view of the absorber mass;

2 a perspective view of the threaded nut;

3 a plan view of a part of the subframe;

4 a sectional view through a Tilgeranordnung;

5 a further sectional view through a Tilgeranordnung.

According to the 1 has an absorber mass 6 for an in 4 and 5 Tilgeranordnung shown 1 a dumbbell-shaped body with a central through-hole 5 by two upstanding pins 7 is lined.

According to the 2 has a threaded nut 4 for an in 4 and 5 Tilgeranordnung shown 1 a head 4a with an internal thread, by a specially shaped, flat collar 4b is surrounded. Figuratively speaking, the head stands 4a on the collar 4b ,

According to the 3 has a subframe 8th as a component to be damped 2 a trained as a hollow profile side member 9 , in the wall of an opening 3 arranged with rotationally asymmetric diameter. The collar 4b the threaded nut 4 out 2 has one to the opening 3 complementary contour, the total area but is smaller, resulting in a clearance fit.

According to the 4 and 5 has a damper arrangement 1 a subframe 8th for a vehicle as a component to be damped 2 with a longitudinal beam formed as a hollow profile 9 , in the wall of an opening 3 arranged with rotationally asymmetric diameter. The opening 3 is located on the lower side of the longitudinal member when installed 9 , In the opening 3 is a threaded nut 4 with a collar 4b and a head 4a used, with the diameter of the head 4a smaller than the smallest diameter of the opening 3 is and the collar 4b in at least one blocking position, an undercut to the opening 3 has, so no longer can be pulled out of this. The collar 4b is with a weld cohesively on the side member 9 established. The head 4a points in the installed state downwards in the direction of a damping mass 6 , The absorber mass 6 is a dumbbell-shaped body with a central through-hole 5 for receiving a screw, not shown. From the absorber mass 6 two pins protrude 7 upwards and reach into the opening 3 between the collar 4b and the edge of the opening 3 , The game between pins 7 , Collar 4b and opening edge must be chosen as low as possible. The absorber mass 6 is through a into the through hole 5 pushed and into the internal thread of the threaded nut 4 fastened screw (not shown) attached. The tightening torque is chosen so high that the screw does not revert to itself from the threaded nut 4 can solve.

LIST OF REFERENCE NUMBERS

1

Tilgeranordnung

2

component

3

opening

4

threaded nut

4a

head

4b

collar

5

Through Hole

6

absorber mass

7

Pin code

8th

subframe

9

longitudinal beams

Claims (10)

Tilger arrangement ( 1 ) comprising a component to be damped ( 2 ) with an opening ( 3 ), in which a threaded nut ( 4 ) is held cohesively, and an absorber mass ( 6 ), with one in the threaded nut ( 4 ) screwed on the component ( 2 ), characterized in that the opening ( 3 ) is not rotationally symmetrical and the threaded nut ( 4 ) a head ( 4a ) whose diameter is smaller than the smallest diameter of the opening ( 3 ), and a collar ( 4b ), which in at least one blocking position an undercut to the opening ( 3 ), wherein the threaded nut ( 4 ) in the blocking position cohesively in the opening ( 3 ) and where from the absorber mass ( 6 ) at least one pin ( 7 ) protruding between collar ( 4b ) and opening edge in the opening ( 3 ) protrudes. Tilger arrangement ( 1 ) according to claim 1, characterized in that the opening ( 3 ) is designed as a slot. Tilger arrangement ( 1 ) according to claim 1 or 2, characterized in that the collar ( 4b ) one to the opening ( 3 ) has identical shape with clearance. Tilger arrangement ( 1 ) according to one of claims 1 to 3, characterized in that the threaded nut ( 4 ) in the blocking position with the component ( 2 ) is welded. Tilger arrangement ( 1 ) according to one of claims 1 to 4, characterized in that the absorber mass ( 6 ) a through hole ( 5 ), through which the screw is inserted. Tilger arrangement ( 1 ) according to one of claims 1 to 5, characterized in that of the absorber mass ( 6 ) two pins ( 7 ) protrude the collar ( 4b ) in the locked position on both sides. Subframe ( 8th ) for a vehicle having at least one absorber arrangement ( 1 ) according to claim 1. Subframe ( 8th ) according to claim 7, characterized in that the subframe ( 8th ) of two parallel spaced side members ( 9 ) and at least one of the side members ( 9 ) connecting cross member, wherein the Tilgeranordnung ( 1 ) on one of the longitudinal members ( 9 ) is arranged. Subframe ( 8th ) according to claim 7 or 8, characterized in that the longitudinal member ( 9 ) forms a closed hollow profile. Method for producing a absorber arrangement ( 1 ), comprising the following steps: - providing a component to be damped ( 2 ) with a non-rotationally symmetrical opening ( 3 ); - Inserting a threaded nut ( 4 ) with a head ( 4a ) whose diameter is smaller than the smallest diameter of the opening ( 3 ), and a collar ( 4b ), which in at least one blocking position an undercut to the opening ( 3 ), in the opening ( 3 ); - turning the nut ( 4 ) relative to the component ( 2 ) in the locked position; - cohesive connection of the threaded nut ( 4 ) with the component ( 2 ); - Applying an absorber mass ( 6 ) to the threaded nut ( 4 ), whereby of the absorber mass ( 6 ) at least one pin ( 7 ) protruding between collar ( 4b ) and opening edge in the opening ( 3 ); - Determining the absorber mass ( 6 ) on the component ( 2 ) with one in the threaded nut ( 4 ) screwed in.

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