DE10311196A1 - Suspension especially for exhaust system of motor vehicle has upper section of third elastomer component connected to second elastomer component by rib formed from elastic material which is subjected to compressive/thrust load - Google Patents

Abstract

The suspension, especially for an exhaust system of a motor vehicle, has the upper section (42) of a third elastomer component (41) connected by a rib (34) to a second elastomer component (31) by its opposite lying sides (45,45'). A second means of fastening (44) for the fastening of a second object is located in the lower section (43) of the third elastomer component. Each rib is formed at least partially from elastic material and when the suspension is in operation is subjected exclusively to a compressive/thrust load between the first and second object.

Description

The invention relates to a suspension, in particular for one Exhaust system of a motor vehicle.

With a suspension, especially for an exhaust system of a motor vehicle, one tries, on the one hand preferably size To ensure reliability and on the other hand if possible no transmission of vibrations of a suspended part, for example the exhaust system, about the suspension on a supportive Object to cause, for example, the body of the motor vehicle. To the transfer to prevent vibrations, decoupling (vibration isolation) resorted. For this purpose, elements with a low dynamic spring rate are used. To reduce vibrations, spring elements in particular made of, for example, elastomer material. Elastomer springs, in particular however, if they are under tension, they have poor seating behavior, so that they lengthen over time, which eventually leads to a material break or at least cracking and thus too low reliability. Therefore, conventional suspensions while of a vehicle's lifespan are replaced several times, resulting in a increased Repair effort and thus time and cost leads. you tried to work around this problem by working with some suspensions necessary for vibration reduction elastomer springs below an opening for Attachment of the to be damped Partly, so on the supporting Object positioned side facing said opening. this has However, the disadvantage that the suspension has a large amount of space below said opening needed.

For example, from the EP 0 320 088 B1 an elastomeric suspension structure is known in particular for an exhaust system of a motor vehicle, which has two openings, namely one for engaging the exhaust system and the other for engaging the body of the motor vehicle, each in an elastomer body. These two elastomer bodies are connected to one another via a further elastomer body, and a first metal component runs through all three elastomer bodies for reinforcement. The lower elastomer body facing the exhaust system further comprises an outer and an inner annular section, these two sections being connected via elastomer springs in the region of the lower opening, which is surrounded by a second metal component and serves to fasten the exhaust system. These elastomer springs are primarily subjected to tensile stress during operation, so that this suspension has poor setting behavior.

From the EP 0 529 250 B1 An elastic suspension for an exhaust system of a motor vehicle with two openings is known, of which the lower opening, which serves to fasten the exhaust system, is arranged in an elastomer body which is located in a trough-shaped, stiffening-serving, first metal component, which in turn is located over two elastomer springs extending obliquely outwards and downwards are fastened to an outer, rhombus-shaped, tensile-resistant, second metal component. Because the elastomer springs are arranged below the lower opening, there is essentially a pressure / push load during operation of the suspension and there is therefore sufficient seating behavior, but the space requirement below the lower opening is increased. In a motor vehicle, this can result in a ground clearance line being undershot, which is contrary to the use of such a suspension.

Object of the present invention it is therefore a suspension, especially for to deliver an exhaust system of a motor vehicle, which has the disadvantages of the state of the art, especially both very good damping properties also has a high level of reliability, while at the same time being low Installation space below the lower opening for fastening the exhaust system.

• – einem oberen, einem ersten Gegenstand zugewandten Abschnitt, umfassend einen ersten Körper mit einem ersten Mittel für eine Befestigung an dem ersten Gegenstand,
• – einem unteren, mit dem oberen Abschnitt verbundenen Abschnitt, umfassend einen zweiten Körper, und
• – einem inneren Abschnitt innerhalb des unteren Abschnitts mit einem dritten Körper, der einen oberen, dem ersten Gegenstand zugewandten Abschnitt und einen unteren, einem zweiten, an den ersten Gegenstand über die Aufhängung anzuhängenden Gegenstand zugewandten Abschnitt aufweist, wobei
• – der obere Abschnitt des dritten Körpers an zwei seiner sich relativ zur Längserstreckung der Aufhängung zwischen dem ersten und dem zweiten Gegenstand gegenüberliegenden Seite über jeweils zumindest einen Steg mit dem zweiten Körper verbunden ist,
• – in dem unteren Abschnitt des dritten Körpers ein zweites Mittel für eine Befestigung des zweiten Gegenstandes angeordnet ist, und
• – jeder Steg zumindest teilweise aus elastischem Material ausgebildet ist sowie im Betrieb der Aufhängung zwischen dem ersten und dem zweiten Gegenstand im Wesentlichen ausschließlich einer Druck/Schubbelastung ausgesetzt ist.

This object is achieved according to the invention by a suspension, in particular for an exhaust system of a motor vehicle, with

• An upper section facing a first object, comprising a first body with a first means for attachment to the first object,
• A lower section connected to the upper section, comprising a second body, and
• An inner portion within the lower portion with a third body having an upper portion facing the first item and a lower portion facing a second item to be attached to the first item via the suspension, wherein
• The upper section of the third body is connected to the second body on at least two of its sides opposite each other relative to the longitudinal extent of the suspension between the first and the second object,
• A second means for fastening the second object is arranged in the lower section of the third body, and
• - Each web is at least partially made of elastic material and is essentially exclusively exposed to a pressure / shear load during operation of the suspension between the first and the second object.

It is preferred that the first body, the second body and / or the third body is or are at least partially reinforced, preferably in each case by a component made of a rigid and a hit resistant material, especially in the form of a metal component.

One embodiment of the invention is characterized in that the first body in longitudinal section essentially annular is formed and / or a substantially ring-shaped first Part at least partially surrounds.

It can further be provided that the second body in longitudinal section essentially loop-shaped is formed and / or essentially in longitudinal section looped second component at least partially surrounds.

It is also proposed according to the invention that the first component is firmly connected to the second component.

The invention also proposes that the third body in longitudinal section essentially eight-shaped or kidney-shaped is formed and / or essentially in longitudinal section eight shaped or kidney-shaped third component at least partially surrounds.

It can further be provided that the first, second and / or third metal component from a strip, is preferably made of sheet metal or steel.

According to the invention, it can also be provided that that the first, second and / or third body at least partially has elastic material, preferably an elastomer body.

Furthermore, the invention proposes that the first and / or second means for fastening in the form of an opening, in particular a bolt receptacle.

It can also be provided that the Longitudinal bars the suspension are arranged essentially above the second means.

It is preferred according to the invention that the first agent in the top third of the suspension and the second agent in the lower third of the suspension, relative to the longitudinal extent the suspension considered, are arranged.

The invention also proposes that the ridges extend substantially from the center of the lower section essentially to the center of the suspension in the area of the connection of the inner section with the webs, relative to the longitudinal extent the suspension considered, spread out.

Can also according to the invention be provided that two webs to be extended towards each other enclose an angle of less than 180 °, preferably an angle between approx. 50 ° and 150 °, and / or each web is at an angle of less than 180 ° from the outer edge of the second section extends inwards and upwards, preferably with an angle of approx. 50 ° to 150 °, and / or each web with the inner section at an angle less than Encloses 180 °, preferably an angle in a range between approximately 50 ° and 150 °.

The invention also proposes that between the lower section and the inner section at least a stop at least partially made of an elastic material is provided, preferably comprising in each case at least one projection of the second elastomer body and / or at least one projection of the third elastomer body.

It can also be provided that the second elastomer body below the first means in the area of its connection with the first elastomer body a projection that spreads in the direction of the third elastomer body, preferably in the form of a stop lug.

It is preferred according to the invention that the stop relative to the longitudinal central axis the suspension is staggered.

Furthermore, the invention proposes that the second elastomer body below the second means in the direction of the third elastomer body spreading projection, preferably in the form of a stop lug, includes.

It can be provided that the third elastomer body an upper and / or a lower, substantially flat end for Presentation of an impact surface for the second elastomer body, especially its projection.

It can also be provided that the upper and / or lower section of the third body in longitudinal section essentially triangular and / or bell-shaped is or are formed, preferably a longitudinal section in the form of an isosceles Triangle.

The invention also proposes that the impact surface the upper section of the third elastomer body comprises one side of the triangle, and / or of the two towards the lower section extending the third elastomer body Sides of the triangle each have at least one web for connection with the second elastomer body spreads.

Finally, can be provided according to the invention be that the first, second and / or third body are molded in one, and / or the first, second and / or third component are formed in one.

The invention is therefore based on the knowledge that good setting behavior, in particular in the case of a pressure / push load, and a high level of reliability for a suspension can be ensured by arranging elastomer springs in the central region of the suspension and using an inner, essentially eight-shaped one Reinforcement component, in the lower section of which the lower fastening opening is arranged for an exhaust system, for example, and on the upper section of which the elastomer springs engage. This ensures that, on the one hand, a tensile load applied to the suspension, in particular the lower fastening opening, results in a compressive load on the Elas tomer springs is converted and on the other hand the suspension has a much smaller space below the lower opening compared to known suspensions with good setting behavior and great reliability, so that the suspension according to the invention can not fall below the ground clearance line of a motor vehicle. The arrangement of the essentially eight-shaped reinforcing component within a loop-shaped reinforcing component, which is rigidly connected in particular to an annular reinforcing component which surrounds the upper opening, all reinforcing components preferably being embedded in the form of metal components in elastomer bodies, on the one hand achieves a high degree of transverse rigidity and on the other hand if the suspension is heavily overloaded, the reliability is further increased.

Other features and advantages of Invention result from the following description, in which an embodiment the invention with reference to schematic drawings is explained in detail. It shows:

1 a perspective view of an embodiment of a suspension according to the invention;

2 a perspective view of metal components for use in the suspension of 1 ; and

3 a plan view of the suspension of 1 ,

The 1 to 3 show a suspension according to the invention 1 that have an upper section 20 with a first opening 21 , for example in the form of a bolt receptacle, for attachment to a vehicle floor, not shown, by an annular first metal component 22 surrounded by a large number of holes 23 provided and by a first elastomer body 24 is surrounded.

The suspension 1 also includes a lower section 30 with an outer, loop-like, second elastomer body 31 who is at his one, in the 1 and 3 upper end 35 with the top section 20 is connected below the first opening 21 a stop nose 33 has a loop-shaped second metal component 37 with holes 38 surrounds and two bridges 34 . 34 ' provides.

The first and the second metal component 22 . 37 are rigidly connected to the suspension 1 to strengthen, so that even with a very strong overload of the suspension 1 Reliability is given.

The two bridges 34 . 34 ' act as elastomer springs and extend within the lower section 30 , approximately in the middle between its upper end 35 and its lower end opposite this 36 obliquely inwards towards the upper section 20 to connect to an inner section 40 enter into. The inner section 40 comprises a third elastomer body 41 with an upper, the upper section 20 facing section 42 and a lower section opposite this 43 , Within the lower section 43 of the third elastomer body 41 there is a second opening 44 , for example in the form of a bolt receptacle to which a part to be damped, such as an exhaust system (not shown), can be attached. The second opening 44 is located below the attachment points of the webs 34 . 34 ' to the third elastomer body 41 , since the starting points in the upper section 42 of the third elastomer body 41 lie. This ensures that the required installation space a below the second opening 44 of the third elastomer body 41 is small.

The top section 42 of the third elastomer body 41 has two sloping levels 45 . 45 ' on that towards the bottom section 43 of the third elastomer body 41 approach each other and from each of which one of the webs 34 . 34 ' extends approximately at a right angle obliquely downwards and outwards. The top of the top section 42 of the third elastomer body 41 is also shaped so flat that it has an impact surface 46 for the stop nose 33 of the second elastomer body 31 represents.

Inside the third elastomer body 41 there is an eight-shaped third metal component 47 , which is roughly the outer contour of the third elastomer body 41 has and with holes 48 is provided. The third metal component 47 points in analogy to the third elastomer body 41 an upper section 42 ' and a lower section 43 ' on. Between the top section 42 ' and the bottom section 43 ' of the third metal component 47 there is a connection 49 the opposite inner surfaces of the third metal component 47 , so that essentially the shape of an 8 is created. This connection 49 leads to an improvement in the lateral rigidity of the suspension 1 ,

The force from the part to be damped, which at the second opening 44 is attached, is via the third elastomer body 41 who is the third metal component 47 encloses, over the top section 42 of the third elastomer body 41 , namely over its levels 45 . 45 ' , on the bridges 34 . 34 ' of the second elastomer body 31 transfer. This ensures that the webs 34 . 34 ' can be used as elastomer springs to absorb a pressure / shear load, whereby a good setting behavior is achieved, which in turn extends the lifespan of the suspension 1 serves and leads to a high reliability.

In the 2 in the metal components 22 . 37 and 47 holes shown 23 . 38 . 48 and those in the 1 and 3 on the outside of the elastomer body 24 and 31 illustrated groove-shaped depressions 101 are purely constructive measures to prevent deformation during manufacture.

The in the description above, in The claims and features of the invention disclosed in the drawings can be essential both individually and in any combination for realizing the invention in its various embodiments.

1

suspension

20

section

21

opening

22

metal component

23

hole

24

elastomer body

30

section

31

elastomer body

33

stop lug

34 34 '

web

35

The End

36

The End

37

metal component

38

hole

40

section

41

elastomer body

42 42 '

section

43 43 '

section

44

opening

45, 45 '

level

46

impact surface

47

metal component

48

hole

49

connection

101

deepening

a

space

Claims (21)

Suspension, in particular for an exhaust system of a motor vehicle, with - an upper section facing a first object ( 20 ), comprising a first body ( 24 ) with a first means ( 21 ) for attachment to the first object, - a lower, with the upper section ( 20 ) connected section ( 30 ), comprising a second body ( 31 ), and - an inner section ( 40 ) within the lower section ( 30 ) with a third body ( 41 ) which has an upper section facing the first object ( 42 . 42 ' ) and a lower section facing a second article to be attached to the first article via the suspension ( 43 . 43 ' ), whereby - the upper section ( 42 . 42 ' ) of the third body ( 41 ) on two of its sides opposite one another relative to the longitudinal extent of the suspension between the first and the second object ( 45 . 45 ' ) via at least one web ( 34 . 34 ' ) with the second body ( 31 ) is connected - in the lower section ( 43 . 43 ' ) of the third body ( 41 ) a second means ( 44 ) is arranged for fastening the second object, and - each web ( 34 . 34 ' ) is at least partially made of elastic material and is essentially exclusively subjected to a pressure / shear load during operation of the suspension between the first and the second object. Suspension according to claim 1, characterized in that the first body ( 24 ), the second body ( 31 ) and / or the third body ( 41 ) is or are at least partially reinforced, preferably in each case by a component made of a rigid and heat-resistant material, in particular in the form of a metal component ( 22 . 37 . 47 ). Suspension according to claim 1 or 2, characterized in that the first body ( 24 ) is essentially annular in longitudinal section and / or a first component which is essentially annular in longitudinal section ( 22 ) at least partially surrounds. Suspension according to one of the preceding claims, characterized in that the second body ( 31 ) is essentially loop-shaped in longitudinal section and / or a second component essentially loop-shaped in longitudinal section ( 37 ) at least partially surrounds. Suspension according to claim 3 and 4, characterized in that the first component ( 22 ) firmly with the second component ( 37 ) connected is. Suspension according to one of the preceding claims, characterized in that the third body ( 41 ) is essentially eight-shaped or kidney-shaped in longitudinal section and / or a third component is substantially eight-shaped or kidney-shaped in longitudinal section ( 47 ) at least partially surrounds. Suspension according to one of claims 2 to 6, characterized in that the first, second and / or third metal component ( 22 . 37 . 47 ) is or are formed from a strip, preferably sheet metal or steel. Suspension according to one of the preceding claims, characterized in that the first, second and / or third body ( 24 . 31 . 41 ) at least partially has an elastic material, preferably an elastomer body. Suspension according to one of the preceding claims, characterized in that the first and / or second means ( 21 . 44 ) for attachment in the form of an opening, in particular a bolt receptacle. Suspension according to one of the preceding claims, characterized in that the webs ( 34 . 34 ' ) in the longitudinal direction of the suspension essentially above the second means ( 44 ) are arranged. Suspension according to one of the preceding claims, characterized in that the first means ( 21 ) in the top third of the suspension and the second means ( 44 ) are arranged in the lower third of the suspension, relative to the longitudinal extension of the suspension. Suspension according to one of the preceding claims, characterized in that the webs ( 34 . 34 ' ) essentially from the center of the lower section ( 30 ) essentially to the center of the suspension in the area of the connection of the inner section ( 40 ) with the webs ( 34 . 34 ' ), considered relative to the length of the suspension. Suspension according to one of the preceding claims, characterized in that two webs (to be extended towards one another) 34 . 34 ' ) enclose an angle of less than 180 °, preferably an angle between approximately 50 ° and 150 °, and / or each web ( 34 . 34 ' ) at an angle of less than 180 ° from the outer edge of the second section ( 30 ) extends inwards and upwards, preferably at an angle of approx. 50 ° to 150 °, and / or each web ( 34 . 34 ' ) with the inner section ( 40 ) encloses an angle of less than 180 °, preferably an angle in a range between approximately 50 ° and 150 °. Suspension according to one of the preceding claims, characterized in that between the lower section ( 30 ) and the inner section ( 40 ) at least one stop ( 33 ) is at least partially made of an elastic material, preferably comprising in each case at least one projection of the second elastomer body ( 31 ) and / or at least one protrusion of the third elastomer body ( 41 ). Suspension according to claim 14, characterized in that the second elastomer body ( 31 ) below the first mean ( 21 ) in the area of its connection with the first elastomer body ( 24 ) in the direction of the third elastomer body ( 41 ) spreading projection, preferably in the form of a stop lug ( 33 ). suspension according to claim 14 or 15, characterized in that the stop relative to the longitudinal central axis the suspension is staggered. Suspension according to one of claims 14 to 16, characterized in that the second elastomer body ( 31 ) below the second agent ( 44 ) in the direction of the third elastomer body ( 41 ) spreading projection, preferably in the form of a stop lug. Suspension according to one of claims 15 or 17, characterized in that the third elastomer body ( 41 ) an upper and / or a lower, substantially flat end for the presentation of an impact surface ( 46 ) for the second elastomer body ( 31 ), in particular its projection. Suspension according to one of the preceding claims, characterized in that the upper and / or lower section ( 42 . 43 ) of the third body ( 41 ) is or is essentially triangular and / or bell-shaped in longitudinal section, preferably has or have a longitudinal section in the form of an isosceles triangle. Suspension according to claim 19, characterized in that the impact surface ( 46 ) of the upper section ( 42 ) of the third elastomer body ( 41 ) encompasses one side of the triangle, and / or of the two points towards the lower section ( 43 ) of the third elastomer body ( 41 ) extending sides of the triangle each have at least one web ( 34 . 34 ' ) for connection to the second elastomer body ( 31 ) spreads. Suspension according to one of the preceding claims, characterized in that the first, second and / or third body ( 24 . 31 . 41 ) are formed in one, and / or the first, second and / or third component ( 22 . 37 . 47 ) are formed in one.