DE102022103311A1 - elastomer bearing - Google Patents

Abstract

Elastomer bearing with an inner part (2) extending in an axial direction (x), which has on its outer circumference an outer contact surface (4) running around a longitudinal bearing axis (3) extending in the axial direction (x), one of the inner parts (2 ) intermediate sleeve (5) surrounding at a distance, an outer sleeve (6) surrounding the intermediate sleeve (5) at a distance, an outer bearing body (7) arranged between the intermediate sleeve (5) and the outer sleeve (6), which consists of an elastomer and both connected to the intermediate sleeve (5) as well as to the outer sleeve (6), and an inner bearing body (8) arranged between the inner part (2) and the intermediate sleeve (5), which bears slidably on the intermediate sleeve (5) and on its inner circumference has an inner contact surface (9) running around the longitudinal bearing axis (3) and bearing against the outer contact surface (4), wherein in one of the contact surfaces (4) there is at least one annular groove (12) running around the longitudinal bearing axis (3) and on at least one projection (13) engaging in this annular groove (12) is provided on another of the contact surfaces (9).

Description

The invention relates to an elastomer bearing with an inner part extending in an axial direction, which has on its outer circumference an outer contact surface running around a longitudinal bearing axis extending in the axial direction, an intermediate sleeve surrounding the inner part at a distance, an outer sleeve surrounding the intermediate sleeve at a distance, an outer bearing body which is arranged between the intermediate sleeve and the outer sleeve and consists of an elastomer and is connected to both the intermediate sleeve and the outer sleeve, and an inner bearing body which is arranged between the inner part and the intermediate sleeve and which bears slidably against the intermediate sleeve and at its Inner circumference has an inner bearing surface which runs around the longitudinal axis of the bearing and bears against the outer bearing surface.

The DE 10 2004 031 559 A1 discloses an elastomeric bush bearing with a hollow-cylindrical inner sleeve, a sleeve-shaped outer part surrounding it concentrically or eccentrically and an elastomeric bearing body arranged in between, which consists of an inner bearing body and an outer bearing body, between which at least one inner part extending in the circumferential and axial direction is enclosed , whereby the inner bearing body is formed by at least one elastomeric molded part, which is pushed in from one axial end of the bearing between the inner sleeve and the inner part connected to the outer bearing body, forming a sliding surface for each of them, and is held under pretension by means of an annular disk which is the bearing end in question is pressed on and rests against the inner contour of the inner sleeve as a result of the deformation that has occurred in the process, forming a press fit.

The washers serve in particular to axially secure the inner bearing body on the inner sleeve. However, the production and assembly of the annular discs causes relatively high costs.

Proceeding from this, the invention is based in particular on the object of being able to produce an elastomer bearing of the type mentioned at the outset as cost-effectively as possible.

According to the invention, this object is achieved by an elastomer bearing according to claim 1 . Preferred developments of the invention are given in the dependent claims and in the following description.

An elastomer bearing with an inner part extending in an axial direction, which has on its outer circumference an outer contact surface running around a longitudinal bearing axis extending in the axial direction, an intermediate sleeve surrounding the inner part at a distance, an outer sleeve surrounding the intermediate sleeve at a distance, an outer sleeve between the The outer bearing body is arranged between the intermediate sleeve and the outer sleeve, which consists of an elastomer and is connected to both the intermediate sleeve and the outer sleeve, and an inner bearing body which is arranged between the inner part and the intermediate sleeve and which bears slidably on the intermediate sleeve and on its inner circumference is one um has an inner contact surface that runs around the longitudinal axis of the bearing and bears against the outer contact surface, is developed according to the invention in particular in that at least one annular groove that runs around the longitudinal axis of the bearing is provided in one of the contact surfaces and at least one projection that engages in this annular groove is provided on another of the contact surfaces.

The inner bearing body is axially secured on the inner part by the at least one annular groove and the at least one projection, so that the aforementioned annular disks and their assembly can be omitted.

The bearing longitudinal axis runs in particular centrally through the inner part and/or centrally through the inner bearing body and/or centrally through the intermediate sleeve and/or centrally through the outer bearing body and/or centrally through the outer sleeve and/or centrally through the elastomer bearing. A direction running transversely to the longitudinal axis of the bearing and/or transversely to the axial direction is referred to in particular as the radial direction. A direction running around the longitudinal axis of the bearing is preferably referred to as the circumferential direction. The expression "at least one" includes in particular the meaning of "one" or "exactly one".

The inner bearing body is preferably sleeve-shaped. The inner bearing body is preferably formed by at least one bearing sleeve. The bearing sleeve can also be referred to as a sliding sleeve, for example. In particular, the longitudinal axis of the bearing runs centrally through the bearing sleeve.

According to one embodiment, the inner bearing body is formed by two or more bearing sleeves arranged one behind the other in the axial direction. As a result, for example, the assembly of the inner bearing body is facilitated, particularly when it encompasses the axial ends of the intermediate sleeve. The longitudinal axis of the bearing preferably runs centrally through each bearing sleeve. The inner bearing body with each bearing sleeve is preferably in sliding contact with the intermediate sleeve. Each bearing sleeve preferably has an axial section of the inner contact surface on. Each bearing sleeve preferably rests with its axial section of the inner contact surface on one or in each case an axial section of the outer contact surface. Advantageously, at least one annular groove running around the longitudinal axis of the bearing is provided in the region of each bearing sleeve in one of the contact surfaces, and at least one projection engaging in this annular groove is provided on another of the contact surfaces. Each bearing sleeve can also be referred to as a sliding sleeve, for example.

The annular grooves are preferably spaced apart from one another in the axial direction. The projections are preferably spaced apart from one another in the axial direction. The inner bearing body and/or each bearing sleeve is/are advantageously secured on the inner part, in particular additionally, in a non-positive or frictional manner. For example, the inner bearing body and/or each bearing sleeve is radially tensioned or pretensioned.

The inner bearing body and/or the inner bearing surface and/or each bearing sleeve and/or each section of the inner bearing surface is preferably rotationally symmetrical or essentially rotationally symmetrical with respect to the longitudinal axis of the bearing. Preferably, the inner bearing body and/or each bearing sleeve is or comprises a molded part. The inner bearing body and/or each bearing sleeve is advantageously made of plastic. For example, the inner bearing body and/or each bearing sleeve is made of polyoxymethylene (POM).

Each projection is preferably ring-shaped. Each projection preferably extends around the longitudinal axis of the bearing. Advantageously, each projection is a radial projection, e.g. pointing radially inwards or radially outwards. For example, the number of protrusions is two. In particular, the number of projections corresponds to the number of bearing sleeves. For example, the number of annular grooves is two. In particular, the number of annular grooves corresponds to the number of bearing sleeves. The number of projections preferably corresponds to the number of annular grooves. Each annular groove preferably forms a preferably radial indentation or groove which is directed radially inwards or radially outwards, for example.

The inner part is preferably made of metal. For example, the inner part is made of aluminum or a ferrous material such as steel. The inner part is preferably made of solid material. Alternatively, the inner part is designed, for example, as a sleeve, which is referred to in particular as an inner sleeve. Preferably, the outer contact surface and/or the inner part is rotationally symmetrical or substantially rotationally symmetrical in the area of the outer contact surface, in particular with respect to the longitudinal axis of the bearing.

The inner part preferably extends, in particular in the axial direction and/or axially on both sides, out of the outer sleeve and/or out of the intermediate sleeve and/or out of the outer bearing body and/or out of the inner bearing body. The inner part is thus accessible in particular from the outside, for example for assembly purposes. The inner part preferably has at least one through hole at each of its axial ends, which preferably runs transversely to the longitudinal axis of the bearing. A fastening bolt can be passed through each of the through holes, for example. The inner part is advantageously flattened at each of its axial ends.

According to a development, each annular groove is provided on the inner part and each projection is provided on the inner bearing body. Each annular groove is preferably provided in the outer bearing surface and each projection on the inner bearing surface. This is usually cheaper than the other way around, especially if the inner part is made of metal and the outer contact surface is machined, for example. Alternatively, however, each annular groove can also be provided on the inner bearing body and each projection on the inner part.

Each projection preferably protrudes, in particular radially inwards and/or in the direction of the inner part, from the inner bearing body and/or from the inner contact surface and/or from the respective bearing sleeve and/or from the respective section of the inner contact surface. Advantageously, each annular groove forms a depression or groove provided on the inner part and/or in the outer contact surface and/or in the respective section of the outer contact surface, in particular directed radially inwards.

According to one embodiment, at least one of the projections is provided on each bearing sleeve. In particular, each bearing sleeve is thus secured in a form-fitting manner on the inner part in the axial direction. Each bearing sleeve preferably engages in one of the annular grooves with its projection. Preferably, at least one of the projections is provided on each portion of the inner bearing surface and at least one of the annular grooves is provided in each portion of the outer bearing surface.

The intermediate sleeve is preferably made of metal. For example, the intermediate sleeve consists of aluminum or an iron material such as steel. The intermediate sleeve is preferably rotationally symmetrical or essentially rotationally symmetrical, in particular with respect to the longitudinal axis of the bearing. Intermediate sleeve is advantageous on their axial ends, in particular radially bent outwards. The intermediate sleeve preferably has a closed peripheral surface. According to an alternative, for example one or more, for example two, window-like openings are provided in the intermediate sleeve. Such an intermediate sleeve is also referred to as a cage and is used, for example, when one or more, preferably two, liquid chambers are provided in the outer bearing body, which are connected to one another in particular by at least one liquid channel.

According to a development, the inner bearing body encompasses the axial ends of the intermediate sleeve. In particular, each bearing sleeve encompasses one or one of the axial ends of the intermediate sleeve. Thus, for example, the intermediate sleeve is positively secured to the inner bearing body in the axial direction. At each of its axial ends, the inner bearing body preferably has an edge bead with an edge that overhangs axially inwards in a U-shape, with these edges in particular forming enclosures for the axial ends of the intermediate sleeve.

According to one embodiment, the inner part has an annular collar which supports and/or rests axially on the inner bearing body and/or on the intermediate sleeve and/or on an arrangement formed by the inner bearing body and the intermediate sleeve. It is thus possible, for example, to introduce a force in an axial main load direction via the inner part into the inner bearing body and/or into the intermediate sleeve and/or into the aforementioned arrangement and/or into the elastomer bearing, without there being a risk, for example, that the inner part is expressed from the inner bearing body.

The outer sleeve is preferably made of metal. For example, the outer sleeve is made of aluminum or a ferrous material such as steel. The outer sleeve is preferably rotationally symmetrical or essentially rotationally symmetrical, in particular with respect to the longitudinal axis of the bearing.

According to a development, the axial length of the outer sleeve is smaller than the axial length of the inner bearing body and/or the intermediate sleeve and/or the or an arrangement formed by the inner bearing body and the intermediate sleeve. This is advantageous, for example, when the radial thickness of the outer bearing body is small, so that an axial clearance remains between the axial ends of the outer sleeve and the axial ends of the intermediate sleeve and/or the inner bearing body.

According to one embodiment, the outer sleeve has an annular collar at one of its axial ends, in particular at its axial end facing the collar of the inner part. This collar serves in particular as an axial stop and/or as an axial support for the outer sleeve on a bearing eye into which the elastomer bearing is pressed or press-fitted, for example.

The outer bearing body is preferably made of rubber. The elastomer bearing can also be referred to as a rubber bearing, for example. In particular, the outer bearing body is adhesively connected both to the intermediate sleeve and to the outer sleeve. For example, the outer bearing body is integrally connected both to the intermediate sleeve and to the outer sleeve. The outer bearing body is preferably vulcanized onto both the intermediate sleeve and the outer sleeve. The outer bearing body advantageously extends in the axial direction and/or in the circumferential direction between the intermediate sleeve and the outer sleeve. For example, the outer bearing body is hollow-cylindrical. The outer bearing body is preferably rotationally symmetrical or essentially rotationally symmetrical, in particular with respect to the longitudinal axis of the bearing.

According to a development, one or more depressions are provided in an outer peripheral surface of the inner bearing body and/or each bearing sleeve, in each of which a lubricant is preferably introduced. It is thus possible, for example, to ensure or increase the ability of the inner bearing body and/or each bearing sleeve to slide relative to the intermediate sleeve. Preferably, the one or more depressions, in particular per bearing sleeve of the inner bearing body, comprise one or more axial lubricant grooves and/or one or more annular lubricant grooves running around the longitudinal axis of the bearing, which preferably intersect the one or more axial lubricant grooves.

The elastomer bearing according to the invention is particularly torsionally flexible and/or radially stiff. For example, the elastomer bearing according to the invention forms a torsionally flexible, radially stiff and axially secured bearing. The elastomer bearing according to the invention is preferably provided for a vehicle, in particular for a suspension arm of a vehicle. The vehicle is preferably a motor vehicle.

• 1 eine perspektivische Außenansicht eines Elastomerlagers gemäß einer Ausführungsform,
• 2 eine Draufsicht auf das Elastomerlager nach 1,
• 3 eine Schnittansicht des Elastomerlagers entlang der aus 2 ersichtlichen Schnittlinie A-A und
• 4 eine Explosionsdarstellung des Elastomerlagers.

The invention is described below using a preferred embodiment with reference to the drawing. Show in the drawing:

• 1 a perspective external view of an elastomer bearing according to an embodiment,
• 2 a top view of the elastomeric bearing 1 ,
• 3 a sectional view of the elastomeric bearing along the 2 apparent section line AA and
• 4 an exploded view of the elastomer bearing.

From the 1 until 4 shows different views of an elastomer bearing 1 according to one embodiment, which has an inner part 2 extending in an axial direction x, which has on its outer circumference an outer contact surface 4 running around a longitudinal bearing axis 3 extending in the axial direction x, an inner part 2 in the intermediate sleeve 5 surrounding a distance, an outer sleeve 6 surrounding the intermediate sleeve 5 at a distance, an outer bearing body 7 arranged between the intermediate sleeve 5 and the outer sleeve 6, which consists of an elastomer and is adhesively connected both to the intermediate sleeve 5 and to the outer sleeve 6, and an inner bearing body 8 arranged between the inner part 2 and the intermediate sleeve 5, which bears slidably on the intermediate sleeve 5 and has on its inner circumference an inner bearing surface 9 running around the longitudinal bearing axis 3 and bearing on the outer bearing surface 4. The inner bearing body 8 is formed by two bearing sleeves 10 and 11 which are arranged one behind the other in the axial direction x and which each have a section 9a or 9b of the inner contact surface 9 .

In the outer contact surface 4 two annular grooves 12 are provided at an axial distance from one another. Furthermore, each bearing sleeve has a projection 13 on its section of the inner contact surface 9 , the projections 13 engaging in the annular grooves 12 . Thus, the bearing sleeves 10 and 11 are positively secured to the inner part 2 in the axial direction x. Each bearing sleeve also encompasses one of the axial ends 18 of the intermediate sleeve 5, which are in particular bent radially outwards. For this purpose, the bearing sleeves 10 and 11 preferably each have an edge bead 19 on their axial ends facing away from one another with a U-shaped edge overhanging axially inwards, these edges forming enclosures for the axial ends 18 of the intermediate sleeve 5 .

The inner part 2 has an annular collar 14 with which the inner part 2 is supported axially on an arrangement formed by the inner bearing body 8 and the intermediate sleeve 5 . Furthermore, the outer sleeve 6 has an annular collar 15 at its axial end facing the collar 14 of the inner part 2 . The collar 15 serves in particular as an axial stop for the outer sleeve 6 on a bearing eye into which the elastomeric bearing is to be pressed.

In the outer peripheral surface of each bearing sleeve 10, 11, a plurality of depressions are provided, in each of which, in particular, a lubricant is introduced. The indentations of each bearing sleeve are preferably formed by a plurality of axial lubricant grooves 16 and a plurality of annular lubricant grooves 17 that intersect them and run around the longitudinal axis 3 of the bearing.

The inner part 2 has at each of its axial ends 20, in particular, a through hole 21 running transversely to the longitudinal axis 3 of the bearing, through which a fastening bolt, for example, can be passed. The inner part 2 is preferably flattened at its axial ends 20 .

Reference List

1

elastomer bearing

2

inner part

3

bearing longitudinal axis

4

outer contact surface

5

intermediate sleeve

6

outer sleeve

7

outer bearing body

8th

inner bearing body

9

inner contact surface

9a

Section of the inner bearing surface

9b

Section of the inner bearing surface

10

bearing sleeve

11

bearing sleeve

12

ring groove

13

head Start

14

collar of the inner part

15

collar of the outer sleeve

16

axial lubricant groove

17

ring-shaped lubricant groove

18

axial end of the intermediate sleeve

19

edge bead

20

axial end of the inner part

21

through hole

x

axial direction

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• DE 102004031559 A1 [0002]

Claims (10)

Elastomer bearing with an inner part (2) extending in an axial direction (x), which has on its outer circumference an outer contact surface (4) running around a longitudinal bearing axis (3) extending in the axial direction (x), one of the inner parts (2 ) intermediate sleeve (5) surrounding at a distance, an outer sleeve (6) surrounding the intermediate sleeve (5) at a distance, an outer bearing body (7) arranged between the intermediate sleeve (5) and the outer sleeve (6), which consists of an elastomer and both connected to the intermediate sleeve (5) as well as to the outer sleeve (6), and an inner bearing body (8) arranged between the inner part (2) and the intermediate sleeve (5), which bears slidably on the intermediate sleeve (5) and on its inner circumference has an inner contact surface (9) running around the longitudinal bearing axis (3) and bearing against the outer contact surface (4), characterized in that in one of the contact surfaces (4) there is at least one annular groove (12 ) and at least one projection (13) engaging in this annular groove (12) is provided on another of the contact surfaces (9). elastomer bearings claim 1 , characterized in that - the inner bearing body (8) is formed by two bearing sleeves (10, 11) which are arranged one behind the other in the axial direction (x) and which each have a section of the inner contact surface (9), and - in the region of each bearing sleeve ( 10, 11) at least one annular groove (12) running around the longitudinal axis (3) of the bearing is provided in one of the contact surfaces (4) and at least one projection (13) engaging in this annular groove (12) is provided on another of the contact surfaces (9). elastomer bearings claim 1 or 2 , characterized in that each annular groove (12) is provided on the inner part (2) and each projection (13) on the inner bearing body (8). elastomer bearings claim 2 or 3 , characterized in that at least one of the projections (13) is provided on each bearing sleeve (10, 11). Elastomer bearing according to one of the preceding claims, characterized in that the inner bearing body (8) encompasses the axial ends of the intermediate sleeve (5). Elastomer bearing according to one of the preceding claims, characterized in that the outer bearing body (7) is adhesively connected both to the intermediate sleeve (5) and to the outer sleeve (6). Elastomer bearing according to one of the preceding claims, characterized in that the inner part (2) has an annular collar (14) with which the inner part (2) is supported axially on an arrangement formed by the inner bearing body (8) and the intermediate sleeve (5). is. Elastomer bearing according to one of the preceding claims, characterized in that the outer sleeve (6) has an annular collar (15) at its axial end facing the collar (14) of the inner part (2). Elastomer bearing according to one of the preceding claims, characterized in that one or more depressions are provided in an outer peripheral surface of the inner bearing body (8), in each of which a lubricant is introduced. elastomer bearings claim 9 , characterized in that the indentations comprise a plurality of axial lubricant grooves (16) and a plurality of annular lubricant grooves (17) intersecting these and running around the longitudinal axis (3) of the bearing.

Images