DE102008048971A1 - Connecting element for flexible connection between e.g. longitudinal chassis beam of vehicle body and longitudinal chassis beam of chassis frame, has casing comprising resilient geometries resiliently deformable by axial compressive force - Google Patents

Abstract

The element (1) has an elastically-flexible rigid medium (13) surrounding a fastening element (10) i.e. screw, and arranged between a head (10') of the fastening element and a component region (20). The medium is contractible under movement damping in its axial direction and/or is outwardly extensible in its radial direction in an assembled condition of the element by developed forces. A casing is made of an elastically flexible material and/or has resilient geometries resiliently deformable by an axial compressive force that is exerted on the medium and causes deformation of the medium.

Description

The The invention relates to a connecting element for an elastic Connection of two components with two opposite ones Component areas with each other, these by means of a fastener are connectable to each other, and at least one of the fastener Surrounding on a part of its length, between a head the fastening element and the component region facing it arranged elastic intermediate member, the one of an elastic-flexible, solid Material is existing medium that of at least one envelope trapped or biased in its axial direction and at its Outside circumference is surrounded, wherein in the assembled state of the Connecting element by forces occurring, the two Move components relative to each other, the medium under motion damping compressible in its axial direction and in its radial direction Externally expandable.

A connecting element of the aforementioned type is made EP 1 136 346 A2 known. There is used as an elastic intermediate member consisting of an elastically flexible, incompressible or low-compressible material body, which is surrounded by a rigid sleeve on its outer periphery. In the assembled state of the connecting element, the body can be compressed under motion damping in its axial direction and expandable in its radial outward direction in a limited by the inner diameter of the sleeve dimension. This limited by the inner diameter of the rigid sleeve radial expansion leads to a relatively hard stop of the connecting element during its stress.

For The present application therefore has as its object the connecting element of the aforementioned type with regard to its properties improve and in particular an enlarged one Travel and a less hard end stop available to deliver.

The Solution of the problem succeeds according to the invention a connecting element of the type mentioned, characterized is characterized in that the envelope of elastic-flexible Material and / or resilient geometries and that by a on the solid, flexible medium exerted compressive force, the a multidimensional deformation of the medium causes the enveloping Geometries are recoverable resiliently deformable.

essential to the invention are in the new connector further resilient elements provided, namely surrounding the flexible medium Geometries. Thus wearing in the inventive Connecting element not only the solid, elastic-flexible medium but also at least one other part of the connecting element at. This further part is the wrapping of the medium, which is also transformed by the deformation of the medium, wherein the wrapping is designed so that it does not have a permanent Deformation but deformed within its elastic deformation range becomes, so resets when the load falls away. Contains the connecting element according to the invention thus at least two or even more resilient parts whose Spring effects are superimposed and compared to the Prior art, an enlarged spring travel allow with a less hard end stop.

Preferably If the envelope is circumferentially of a sleeve and the front side of a disc, wherein preferably the sleeve cup-shaped with a bottom with an opening for the Fastening element is executed. Alternatively, instead of the floor may also be provided a separate separate disc. The Sleeve and the disc are technically relatively simple and thereby inexpensive and reliable components, the same time with relatively little effort with the desired elastic-flexible and / or resilient properties are provided can.

In this regard, preferred embodiments of the connecting element are in the claims 3 to 12 indicated.

Around not just the scope of the sleeve for the generation to use a spring action is further preferably provided that the soil and / or this entge gengesetzten geometry or disc is pre-bent in the relaxed state of the medium. Under pressure the medium in the use of the connecting element then causes the Deformation of the medium a resilient deformation of the soil and / or the opposite geometry or disc, so that too these parts are included in the generation of the spring action.

Prefers the sleeve and / or the disc are made of spring steel, because this material has the desired properties in particular favorably fulfilled.

A further spring effect can be achieved by that between the outer circumference of the medium and the inner circumference of the sleeve a resilient element is arranged.

For the same reason, it is proposed that at least one resilient element be arranged between the bottom of the sleeve and / or the opposite geometry or disc on the one hand and the medium on the other hand. In this way, more resilient parts of the connection be added element, which further increases the achievable travel in a compact design.

Out For ease of installation is preferably the Fastening a through two holes in the component areas running bolt with a nut.

Around also the fastener for the generation of the desired Spring effect to use, the mother in the assembled state of the Fastener underlaid with another, resilient disc be.

In a simple embodiment, the medium at its outer periphery be smooth. If a softer response of the connecting element is desired, the medium at its outer periphery axially and / or circumferentially and / or inclined Have grooves and / or rockers.

In In a first embodiment, the medium may simply have an outer contour have the inner contour of the envelope in unloaded State corresponds. To the spring and damping properties of the connecting element in the desired manner To be able to, the medium can also have a different contour exhibit. In particular, it is provided that the medium to its outer circumference conical or waisted or spherically shaped is.

Regarding the use of the connecting element according to the invention Finally, it is preferably provided that it is an elastic Connection of a vehicle body forms with a chassis.

in the The following will be embodiments with reference to a drawing explained. The figures of the drawing show:

1 a connecting element in the installed state without load,

2 the connecting element in the installed state under load and

3 to 24 various embodiments of a part of the connecting element forming sleeve each seen from top to bottom in longitudinal section, in side view and in plan view.

1 The drawing shows a connecting element 1 in the installed state, in which there are components 2 . 3 connects to each other, which are only indicated in the background. For the components 2 . 3 it may be, for example, longitudinal members of a body frame and a vehicle frame. With the components 2 . 3 each one console is firmly connected, the two opposing component areas 20 . 30 form. Through each component area 20 . 30 runs a hole 21 . 31 that align with each other.

On the upward-facing side of the upper component area 20 is a cup-shaped sleeve 14 with a central opening having a bottom 14 ' placed. In the sleeve 14 is an elastic-flexible, solid medium 13 arranged, with the sleeve 14 in the present unloaded state of the medium 13 this with the release of an air gap 15 surrounds. The medium 13 has a central opening 13 ' that with the two holes 21 . 31 and with the opening in the ground 14 ' flees.

Through the opening 13 ' and the opening in the ground 14 ' and the holes 21 . 31 runs a fastener in the form of a screw 10 , The screw 10 has a head on top 10 ' , which underlay a washer 12 on the upward facing end of the medium 13 is applied. The lower end of the screw 10 protrudes through the hole 31 in the lower component area 30 down before. Here is the interposition of another disc 12 ' A mother 11 screwed onto the screw and secured in this way against loosening. The medium 13 is therefore surrounded on all sides by a wrapping. If necessary, the medium can 13 by appropriate tightening of screw 10 and mother 11 also be biased.

As long as no external loads occur, the two components are located 2 . 3 to each other and are in this position by the connecting element 1 held. Depending on the size of the components 2 . 3 can of course also several fasteners 1 be provided.

The sleeve 14 is designed so that it has resilient properties, wherein the resilient properties are achieved in that on the one hand, the sleeve 14 in the radial direction resilient and recoverable expandable and on the other hand, the ground 14 ' from his in 1 visible, upwards vorgebogenen position resiliently rebound axially outward. Furthermore, the disc 12 under the head 10 ' the screw 10 designed as a spring washer. Also the other disc 12 ' between the mother 11 and the component area 30 is a spring washer.

At a load of the components 2 . 3 leading to a movement of these components 2 . 3 leads away from each other, results in the 2 shown state of the connecting element 1 , Together with the components 2 . 3 also move the respective zugehö ry component areas 20 and 30 away from each other, resulting in axial movement of the screw head 10 ' with the associated disc 12 relative to the medium 13 which causes the medium 13 in the axial direction with a compressive force is applied. This compressive force leads to a multi-dimensional deformation of the medium 13 , causing the inner circumference and the floor 14 ' the sleeve 14 Forces are exerted, resulting in a spring action by deformation of the sleeve 14 radially outward and axially down. These deformations of the sleeve 14 lie in the elastic range, so that an automatic reset takes place. Thus, the connecting element has 1 a multiple spring effect, namely on the one hand by the elastic-flexible, solid medium 13 and by the likewise resilient trained sleeve 14 , Also the discs 12 and 12 ' contribute to the spring effect.

It is essential that the serving of the medium 13 , specifically the sleeve 14 , Is designed so that it is able to be transferred from a relaxed state in an expanded state, from which it is elastically-flexibly recoverable. This is either the sleeve 14 formed of an inherently elastic-flexible material or designed with elastic-flexible geometries.

Examples of such possible designs of the sleeve 14 are in the 3 to 24 the drawing exemplified. In each figure, the same sleeve 14 each shown in different representations.

In the 3 to 6 is the sleeve 14 above in perspective view, in the middle in side view and shown below in plan view. Characteristic of these pods 14 are creases 16 which gives the desired resilient property of the sleeve 14 provide.

The 7 to 17 show in four different representations, from top to bottom in longitudinal section, in perspective view, in side view and in plan view further embodiments of the sleeve 14 , which has the desired spring properties here by different designs of its outline. Also, the soil is included in the spring properties, which in the examples according to 8th and according to 12 and 13 the case is.

The 16 and 17 show pods 14 again in different views, top left respectively in longitudinal section and in perspective view, in the middle in side view and bottom in plan view. The pods 14 according to the 16 and 17 have a substantially hexagonal outline. The sleeve 14 according to 17 is also with stretch lines 16 provided in the axial direction, provided.

The 18 shows top in longitudinal section, in the middle in side view and bottom in plan view of a sleeve 14 , which itself consists of an elastic-flexible, resilient material. The sleeve 14 has here a circular shape, because it is able to expand in itself, since the material of the sleeve allows this here.

The 19 and 20 show in the same representation as the 18 two more pods 14 in which the ground 14 ' is resilient.

In 21 is a sleeve 14 shown in the loaded state of the connecting element, it being visible that under axial load of the medium not specifically drawn here, a radial expansion of the sleeve 14 in its lower part forms. Because the material of the sleeve 14 here is elastic-flexible, the sleeve arises 14 after elimination of the burden back to its original form.

The 22 to 24 Finally, three more examples of a sleeve 14 , which is due to their geometry able to act under load of the medium not shown here springy and reset when the load is lost in its original form. It is in the 22 to 24 the sleeve 14 respectively at the top in longitudinal section, in the middle in side view and shown below in plan view.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• - EP 1136346 A2 [0002]

Claims (21)

Connecting element ( 1 ) for an elastic connection of two components ( 2 . 3 ) with two opposing component areas ( 20 . 30 ) with each other, whereby these by means of a fastener ( 10 ) are connectable to each other, and with at least one of the fastener ( 10 ) on a part of its length, between a head ( 10 ' ) of the fastener ( 10 ) and the component area facing it ( 20 ) arranged elastic intermediate member which consists of an elastic-flexible, solid material medium ( 13 ) which is enclosed or biased by at least one sheath in its axial direction and is surrounded on its outer circumference, wherein in the assembled state of the connecting element ( 1 ) by occurring forces, the two components ( 2 . 3 ) move relative to each other, the medium ( 13 ) is compressible under motion damping in its axial direction and in its radial direction is externally expandable, characterized in that the sheath of elastic-flexible material and / or resilient geometries and that by a on the solid, flexible medium ( 13 ) exerted axial compressive force, which is a multi-dimensional deformation of the medium ( 13 ) causes the enveloping geometries are resettable resiliently deformable. Connecting element according to claim 1, characterized in that the envelope on the circumference of a sleeve ( 14 ) and the front side of a disc ( 12 ), preferably the sleeve ( 14 ) cup-shaped with a bottom ( 14 ' ) with an opening for the fastening element ( 10 ) is executed. Connecting element according to claim 2, characterized in that the sleeve ( 14 ) in a relaxed state of the medium ( 13 ) whose outer circumference, leaving an air gap ( 15 ) surrounds. Connecting element according to one of claims 2 to 3, characterized in that the sleeve ( 14 ) in its unloaded state in its circumferential direction has a non-circular outline over at least part of its axial length. Connecting element according to claim 4, characterized in that the sleeve ( 14 ) seen in the unloaded state in its circumferential direction has an oval or elliptical or dented outline. Connecting element according to claim 4, characterized in that the sleeve ( 14 ) seen in the unloaded state in its circumferential direction has a polygonal outline, preferably with rounded corners. Connecting element according to one of claims 1 to 4, characterized in that the sleeve ( 14 ) Is seen in the unloaded state in its circumferential direction and / or in its axial direction or in another direction corrugated or zigzag-shaped. Connecting element according to one of claims 1 to 4, characterized in that the sleeve ( 14 ) in the unloaded state in its circumferential direction and / or seen in its axial direction or in another direction, at least one molded-in expansion fold ( 16 ) having. Connecting element according to claim 8, characterized in that the expansion folds ( 16 ) over the entire circumference of the sleeve ( 14 ). Connecting element according to claim 8, characterized in that the expansion folds ( 16 ) over several portions of the circumference of the sleeve ( 14 ). Connecting element according to claim 8, characterized in that the expansion folds ( 16 ) over the entire axial length of the sleeve ( 14 ). Connecting element according to claim 8, characterized in that the expansion folds ( 16 ) over part of the axial length of the sleeve ( 14 ). Connecting element according to one of claims 2 to 12, characterized in that the bottom ( 14 ' ) and / or a geometry or disc opposite thereto ( 12 ) in the relaxed state of the medium ( 13 ) is pre-bent. Connecting element according to one of claims 1 to 13, characterized in that the sleeve ( 14 ) and / or the disc ( 12 ) consists of spring steel. Connecting element according to one of claims 1 to 14, characterized in that between the outer periphery of the medium ( 13 ) and the inner circumference of the sleeve ( 14 ) is arranged a resilient element. Connecting element according to one of claims 1 to 15, characterized in that between the ground ( 14 ' ) of the sleeve ( 14 ) and / or the opposite geometry or disk ( 12 ) on the one hand and the medium ( 13 ) On the other hand, at least one resilient element is arranged. Connecting element according to Ansprü che 1 to 16, characterized in that the fastening element ( 10 ) one through two holes ( 21 . 31 ) in the component areas ( 20 . 30 ) extending screw ( 10 ) with a mother ( 11 ). Connecting element according to claim 17, characterized in that the nut ( 11 ) in the assembled state of the connecting element ( 1 ) with another, resilient disc ( 12 ' ) is highlighted. Connecting element according to one of claims 1 to 18, characterized in that the medium ( 13 ) has on its outer circumference axial and / or in the circumferential direction and / or obliquely extending grooves and / or ribs. Connecting element according to one of claims 1 to 19, characterized in that the medium ( 13 ) is conically and / or waisted and / or spherically shaped on its outer circumference. Connecting element according to one of the claims 1 to 20, characterized in that it is an elastic connection a vehicle body with a chassis forms.