CN115992848A - Rubber metal sleeve bearing - Google Patents
Rubber metal sleeve bearing Download PDFInfo
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- CN115992848A CN115992848A CN202111208337.8A CN202111208337A CN115992848A CN 115992848 A CN115992848 A CN 115992848A CN 202111208337 A CN202111208337 A CN 202111208337A CN 115992848 A CN115992848 A CN 115992848A
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Abstract
The invention relates to a rubber metal sleeve bearing (1), in particular a transverse guide arm bearing (1) for a motor vehicle wheel suspension, comprising a metallic inner part (2), an elastomer body (4) arranged radially relative to the inner part (2), and a metallic outer sleeve (6), wherein the elastomer body (4) is fixed to the inner part (2) and the outer sleeve (6) in a material-fitting manner, wherein the outer sleeve (6) is intended to be fixed in a corresponding bearing bore of a guide arm (80), and the inner part (2) has, at both ends, a corresponding flat flange section (21 a,21 b) for fixing to a component. The inner part (2) is an extruded hollow cavity profile cut to length, which is firmly formed at the two longitudinal end upper ends into respective flat flange sections (21 a,21 b) so that the opposing wall sections of the hollow cavity profile are in planar contact with one another.
Description
Technical Field
The invention relates to a rubber metal sleeve bearing, in particular for a transverse guide arm bearing of a motor vehicle wheel suspension, comprising a metal inner part, an elastomer body arranged radially relative to the inner part, and a metal outer sleeve, wherein the elastomer body is fixed to the inner part and the outer sleeve in a material-fitting manner, wherein the outer sleeve is used for fixing the corresponding bearing holes of the guide arm, and the inner part has a corresponding flat flange section on both ends for fixing to a vehicle frame or a vehicle body of the vehicle.
Background
Such rubber metal sleeve bearings, also commonly referred to as elastomeric sleeve bearings, are widely known in the art. The bearing is used in particular on a transverse guide arm, which is arranged on the motor vehicle transversely to the direction of travel, for example in the case of a single wheel suspension. The axial stiffness and in particular the torsional stiffness of the bearing is relatively small, while an increased radial stiffness of the bearing is required. The resulting stiffness requirement relates on the one hand to the elastomer body, but also to the inner part of the bearing, which is conventionally manufactured as a pressure injection part or as a forged part. In addition to providing said stiffness of the bearings, in particular of the inner part, efforts are made to improve the response behaviour of the system to the running forces transmitted from the wheel.
Disclosure of Invention
The aforesaid task of the invention has been solved by a rubber metal sleeve bearing comprising the features of claim 1.
The rubber metal sleeve bearing according to the invention has a metallic inner part, an elastomer body arranged radially relative to the inner part, and an outer sleeve which can be produced in particular from metal, wherein the elastomer body is fixed to the inner part and the outer sleeve in a material-fitting manner, in particular by preheating. The outer sleeve of the bearing is designed for fastening in a corresponding bearing bore of a guide arm, for example a transverse guide arm, wherein the inner part has, on both ends, firmly corresponding flat flange sections for fastening to a further motor vehicle component. The rubber metal sleeve bearing according to the invention is characterized in that the inner part is an extruded hollow cavity profile which is cut or cut to length and which is firmly formed at the two longitudinal end upper ends into respective flat flange sections in such a way that the opposing wall sections of the hollow cavity profile are brought into planar contact with one another in a transverse direction perpendicular to the bearing longitudinal axis.
The basic idea of the rubber metal sleeve bearing according to the invention is to reduce the mass of the bearing by providing an extruded hollow cavity profile, wherein the flat flange section for fastening the bearing to the vehicle frame is produced by shaping an extruded sheet material in the region of the end section of the end face of the hollow cavity profile. The reduction in weight of the inner part and thus of the entire bearing can furthermore simultaneously provide a higher stiffness of the inner part to bending forces than the pressure injection inner part. The extruded hollow cavity profile can be produced, for example, from an aluminum material or a steel material, depending on the embodiment.
In this respect, the bearing according to the invention has an inner part which in the middle region is a hollow cavity profile which can be identical in particular to the original extruded hollow cavity profile and which in the region of its axial end sections is formed by the flange configuration for fastening the bearing. The flange configuration can be formed by molding the initially extruded hollow cavity profile into the axial extension of the flange section.
The expression "cut-off or cut-to-length extruded hollow cavity profile" means a section of the original extruded hollow cavity profile which is long, determined by the production, which is separated from the preceding section by a predetermined axial extension and from which the inner part of the bearing according to the invention is formed by shaping the two longitudinal end sections into two flat flange sections.
Elastomers are generally understood to be vulcanized rubbers of fixed-shape, yet elastically deformable synthetic materials, such as natural rubber or silicone rubber.
Other features and further aspects of the invention according to the invention are set out in the following general description, the accompanying drawings, the description of the drawings and the dependent claims.
Preferably, it can be provided that the respective flange section has two flange webs which are formed flat and which are in contact with one another. The corresponding flange webs of the flange sections can thus be opposing wall sections of the hollow space profile, which wall sections contact one another in a planar manner. This configuration of the flange section formed by the flange plate can in principle be adjusted by a plurality of hollow cavity profiles, in particular hollow cavity profiles which also have a polygonal cross section or a tube cross section, so that the hollow middle section of the inner part can be adapted to specific requirements.
The inner part for fixing the bearing according to the invention enables different configurations. The flange section may be configured, for example, for clamping to a motor vehicle component. Expediently, it is also possible for the two flange sections to have corresponding bores extending through the two corresponding flange webs that are stacked together, which bores extend perpendicularly to the flange plane, in particular for receiving corresponding bolts, by means of which the inner part of the bearing according to the invention can be fastened to the motor vehicle part.
In order to increase the rigidity of the inner part in the region of the flange section, the extruded hollow profile can be designed for the formation of the flange section in such a way that the respective flange section of the inner part of the rubber metal sleeve bearing according to the invention has two flange pieces which are formed flat and contact one another and which are connected to one another on their longitudinal sides or longitudinal edges by curved sections. The curved section can be formed, like a flange plate, by a corresponding axial section of the molded hollow cavity profile.
In a particularly advantageous embodiment, in particular in order to provide a substantially rotationally symmetrical stiffness of the inner part against bending in the region of the intermediate section, it can be provided expediently that the extruded hollow cavity profile is a hollow cylinder profile in order to construct the inner part of the bearing according to the invention, so that the inner part has a substantially hollow cylinder-like configuration relative to the flange section axially inward of the configuration of the inner part. The hollow-cylindrical extruded hollow-chamber profile furthermore facilitates the formation of the flange sections by shaping the hollow-chamber profile in such a way that the respective flange section has two flange pieces which are planar and are in contact with one another and which are each formed flat, wherein the planar flange pieces which are in contact at the same time are connected by a section which is curved and extends in sections perpendicular to the flange plane on the basis of the circumferentially closed hollow-chamber profile which is hollow-cylindrical.
In order to increase the rigidity of the inner part of the bearing according to the invention against bending in the middle section of the inner part and to facilitate the formation of the two flange sections by shaping the extruded hollow cavity profile in the region of the end sections, it is expedient if the radial wall thickness of the hollow cavity profile in the middle section of the inner part, i.e. in the region of the hollow cylindrical configuration of the inner part, is at least 20%, in particular 30%, greater than the thickness of the opposing wall section in the region of the respective flange section. The configuration can be provided, for example, by twisting Cheng Yu a given wall thickness in the region of the end section of the hollow cavity profile, in particular cylindrical, before the hollow cavity profile is molded in the corresponding longitudinal section of the flange section.
In order to provide the predefined features of the bearing according to the invention in the axial direction, it can be provided expediently that the inner part forms a waist contour in a section axially inside relative to the flange section, in particular in the middle section of the inner part, by shaping the hollow cavity profile. It can be provided here that the smallest radial diameter of the outer circumferential surface of the inner part in the region of the hollow space section (middle section) lies approximately in the center of the entire axial extension of the inner part. In particular, in order to increase the radial stiffness of the bearing according to the invention, it may be expedient for the elastomer body of the bearing to have a recess which is arranged circumferentially around the inner part and which is inserted into the elastomer, which recess comprises a harder material than the elastomer, for example a metal or a hard plastic, and which recess extends at least over the entire axial extension of the outer sleeve. Preferably, the insert can be configured in a sleeve-like manner.
In order to provide the specified joint function of the bearing according to the invention, i.e. the relative tilting of the inner part relative to the outer sleeve, the inner part can be expediently arranged on its circumferential surface facing the inner part with respect to its curvature to the waist contour of the inner part in such a way that the radially continuous elastomer layer arranged between the inner part and the inner part has a substantially constant radial thickness over its axial extension.
In order to increase the durability of the bearing according to the invention, in particular in order to avoid tensile loading of the elastomer body during operation of the bearing according to the invention, it can expediently be provided that the bearing is designed to be able to be pressed into the corresponding bearing bore under radial preload in that the elastomer body and the outer sleeve are designed to be axially slotted in such a way that the gap formed thereby on the elastomer body and the axial gap formed on the outer sleeve are oriented circumferentially relative to one another.
By providing an extruded hollow cavity profile for the construction of the inner part of the bearing according to the invention, not only the flange section for fastening the transverse arm bearing to the vehicle body, but also the middle section of the inner part can be constructed in a cost-effective manner by means of a corresponding shaping in a flexible manner as a function of the corresponding requirements regarding the characteristics of the transverse arm bearing.
Drawings
The invention is described below by way of an embodiment of a bearing according to the invention, together with a description of variants, with reference to any of the accompanying drawings, wherein,
fig. 1: a rubber metal sleeve bearing constructed in accordance with the present invention is shown in perspective view,
fig. 2a: an intermediate product of the inner part of the bearing of figure 1 according to the invention is shown in a perspective view,
fig. 2b: an intermediate product of the inner part of fig. 2a is shown in a cross-section perpendicular to the plane of the flange section, and
fig. 3: the bearing according to the invention of fig. 1 is shown in a longitudinal section.
Detailed Description
The following embodiment of the bearing according to the invention is designed as a transverse arm bearing 1, wherein the transverse arm is connected to the vehicle body via the transverse arm bearing 1 described below and to the wheel carrier via a wheel guide hinge at the end facing the wheel. The hinge point can be formed not only on the front axle of the motor vehicle but also on the rear axle of the motor vehicle. Fig. 1 shows in perspective view the basic structure of a transverse guide arm bearing 1 according to the invention. The bearing 1 is in this case embodied as an elastomer sleeve bearing, wherein the inner part 2 has an axial intermediate section 20 with a cylindrical circumferential surface, for example, with which flange sections 21a,21b are joined in a material-fitting manner, which are each formed by two flange webs 22a,22b or 24a,24b which are in contact with one another, wherein the flange webs 22a,22b or 24a,24b which are each connected by a longitudinally extending and curved section 26a, b and 27a, b. The inner part 2 of the transverse arm bearing 1 according to the invention is produced as an extruded hollow-chamber profile of aluminum or steel material having a cylindrical hollow-chamber cross section in this case, wherein the hollow-chamber profile is formed in such a way that the two flange sections 21a,21b are each formed with a solid end, opposite wall sections of the cylindrical hollow-chamber profile being brought into planar contact with one another in the region of the flange sections 21a,21b, which wall sections are connected to one another on their longitudinal sides by curved sections.
The transverse guide arm bearing 1 according to the invention has an outer sleeve 6 arranged at a distance from the middle section or cylindrical circumferential surface 20 of the inner part 2, which outer sleeve surrounds the inner part 2 in the middle section 20 circumferentially at a radial distance. The elastomer body 4 is arranged here between the inner part 2 and the outer sleeve 6, which elastomer body is preheated in the described embodiment not only on the outer sleeve 6 but also on the cylindrical circumferential surface 20 of the inner part 2. In order to provide a fixation of the two flange sections 21a,21b of the lateral pilot arm bearing 1 on the chassis, the flange sections 21a,21b have holes 23a,23b and 25a,25b, which extend through the two corresponding flange pieces 22a,22b and 24a,24b, respectively, for example for receiving bolts. In the embodiment described, the transverse-arm bearing 1 is designed to be received in a corresponding bearing bore of the transverse-arm, in such a way that the cylindrical outer circumferential surface 60 of the outer sleeve 6 is brought into contact with the corresponding interface of the bearing bore, in particular by pressing the transverse-arm bearing 1 into the bearing bore. In one embodiment, it can be provided that the transverse guide arm bearing 1 has an axially slotted elastomer body 4 and an axially slotted outer sleeve 6 in such a way as to form respective gaps oriented circumferentially relative to one another, so that by pressing the transverse guide arm bearing 1 into the bearing bore the respective gaps are closed and thus the elastomer of the elastomer body 4 is preloaded radially.
Fig. 2 shows an intermediate product (fig. 2 a) and a longitudinal section (fig. 2 b) of the inner part 2 of the transverse guide arm bearing 1 according to the invention of fig. 1 in a perspective view, wherein the cross section extends perpendicularly to the flange plane of the flange sections 21a,21 b. The starting product of the inner part 2 of the transverse arm bearing 1 constructed according to the invention is a tubular extruded sheet material of a predetermined length having a cylindrical cross section, which is shaped at its two longitudinal ends over a predetermined axial extent in such a way that two opposing cylindrical half-cross sections are converted into flange pieces 22a,22b or 24a,24b which come into contact with one another, wherein the contacting flange pieces 22a,22b or 24a,24b are connected to one another by a respective curved longitudinal section 26a,26b or 27a,27 b. Starting from the intermediate product shown in fig. 2a and 2b, the inner part 2 of the transverse guide arm bearing 1 constructed according to the invention can be produced by machining flange bores 23a,23b or 25a,25b in the respective flange webs 22a,22b or 24a,24 b. By implementing the holes 23a, b and 25a, b in the flange section, the intermediate product of the inner part 2 of fig. 2 can be processed to form the inner part of the bearing of fig. 1.
In one embodiment, it can also be provided that the cylindrical circumferential surface in the intermediate section 20 of the inner part 2 is shaped accordingly to form a waist contour, which is described in more detail below.
Fig. 3 shows a transverse guide arm bearing 1 constructed according to the invention, similar to the transverse guide arm bearing of fig. 1, in a longitudinal section in a plane which in the drawing is located slightly above the flange plane of the flange sections 21a,21b, wherein an operating situation is shown in which the transverse guide arm bearing 1 is pressed into a corresponding bearing bore of the guide arm 80. As can be seen from the sectional view of the cylindrical middle section 20 of the inner part 2, for example, a cylindrical circumferential surface is formed in the middle section 20 with a waist contour, wherein the elastomer body 4 comprises an axial first elastomer sleeve 40a, a sleeve-shaped insert 45 and an axial second elastomer sleeve 40b in such a way that the insert is inserted through the two elastomer sleeves or elastomer layers. The sleeve-shaped insert 45 can have a curved surface on its inner circumferential surface facing the inner part 2, which surface matches the waist contour of the middle section 20 of the inner part 2, in such a way that the radial thickness of the axially extending first elastomer sleeve 40a has a substantially constant thickness in the radial direction over its main axial extension in order to provide the specified gimbal function of the transverse guide arm bearing 1. In the illustrated embodiment, the radial thickness of the second axial elastomer sleeve 40b increases axially outward from the axial center of the middle section 20 of the inner part 2 in order to provide the specified joint function of the transverse arm bearing 1. In the embodiment described, the elastomer body 4 is connected in a material-fitting manner to the outer sleeve 6 and the inner part 2 by preheating in the region of the central section or of the cylindrical circumferential surface 20 forming the waist contour.
The transverse arm bearing 1 according to the invention of fig. 1 differs from the transverse arm bearing of fig. 3 only in the purely cylindrical configuration of the central section of the inner part 2, wherein the elastomer body 4 can in turn comprise an axial first elastomer sleeve, a sleeve-shaped insert and an axial second elastomer sleeve in such a way that the insert is inserted through the two elastomer sleeves or elastomer layers. In this embodiment, the two elastomer sleeves and the insert may be cylindrically configured.
It is clear to a person skilled in the art that by providing an extruded hollow cavity profile for constructing the inner part 2 of the bearing constructed according to the invention, not only for fixing the transverse arm bearing 1 to the flange sections 21a,21b on the chassis of the motor vehicle, but also the intermediate section 20 of the inner part 2 can be constructed in a cost-effective manner in a flexible manner by means of a corresponding shaping according to the corresponding requirements regarding the characteristics of the transverse arm bearing 1, so that the waist profile described herein can be regarded as one of several preferred embodiments. It is also possible, in particular within the framework of the invention, that the non-rotationally symmetrical response behavior or the corresponding features of the transverse guide arm bearing 1 can be adjusted by means of the corresponding shaping of the intermediate section 20 and/or the configuration of the insert 45.
List of reference numerals
1. Transverse guide arm bearing and rubber metal sleeve bearing
2. Inner part
4. Elastomer body
6. Outer sleeve
20. Cylindrical peripheral surface, intermediate section
21a,21b flange sections
22a,22b flange plate
23a,23b holes
24a,24b flange plate
25a,25b holes
26a,26b curved longitudinal sections
27a,27b are curved longitudinal sections
40a first axial elastomer encasement
40b second axial elastomer encasement
45. Built-in article
60. An outer peripheral surface
80. A guide arm.
Claims (9)
1. Rubber metal sleeve bearing (1), in particular a transverse guide arm bearing (1) for a motor vehicle wheel suspension, comprising a metallic inner part (2), an elastomer body (4) arranged radially relative to the inner part (2), and a metallic outer sleeve (6), wherein the elastomer body (4) is fixed to the inner part (2) and the outer sleeve (6) in a material-fitting manner, wherein the outer sleeve (6) is intended to be fixed in a corresponding bearing bore of a guide arm (80) and the inner part (2) has a corresponding flat flange section (21 a,21 b) for fixing to a component firmly at both ends, characterized in that the inner part (2) is a cut-to-length extruded hollow cavity profile, which is shaped firmly into a corresponding flat flange section (21 a,21 b) at the two longitudinal end upper ends, so that the opposing wall sections of the hollow cavity profile are in surface-like contact with one another.
2. The rubber-metal sleeve bearing (1) according to claim 1, characterized in that the respective flange section (21 a,21 b) has two flange pieces (22 a,22b or 24a,24 b) which are formed flat and contact one another and which are connected to one another on their longitudinal sides by curved sections.
3. The rubber-metal sleeve bearing (1) according to claim 2, characterized in that the two flange sections (21 a,21 b) have respective bores (23 a,23b or 25a,25 b) extending through the corresponding two flange pieces (22 a,22b or 24a,24 b), which bores extend perpendicularly to the flange plane.
4. A rubber-metal sleeve bearing (1) according to claim 1,2 or 3, characterized in that the inner part (2) has a substantially hollow-cylindrical configuration axially inside with respect to the flange section (21 a,21 b).
5. The rubber-metal sleeve bearing (1) according to any one of claims 1 to 4, characterized in that the radial wall thickness of the hollow cavity profile in the middle section (20) (region of hollow-cylindrical configuration) of the inner part (2) is at least 20%, in particular 30%, greater than the thickness of the opposing wall sections in the region of the respective flange sections (21 a,21 b).
6. The rubber-metal sleeve bearing (1) according to any one of claims 1 to 5, characterized in that the inner part (2) is formed into a waist contour by shaping of the hollow cavity profile in a section (middle section) (20) that is axially inner with respect to the flange sections (21 a,21 b).
7. A rubber-metal sleeve bearing (1) according to any one of claims 1 to 6, characterized in that the elastomer body (4) has a built-in (45) arranged circumferentially around the inner part (2) and embedded in an elastomer, the built-in comprising a harder material (metal/hard plastic) than the elastomer, and the built-in extending at least over the entire axial extension of the outer sleeve (6).
8. Rubber-metal sleeve bearing (1) according to claim 7, characterized in that the inlay (45) matches the waist contour of the inner part (2) with respect to its curvature on its circumference facing the inner part (2) such that a radially continuous elastomer layer arranged between the inner part (2) and the inlay (45) has a substantially constant radial thickness over its axial extension.
9. The rubber-metal sleeve bearing (1) according to any one of claims 1 to 8, characterized in that the elastomer body (4) and the outer sleeve (6) are axially grooving-configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208337.8A CN115992848A (en) | 2021-10-18 | 2021-10-18 | Rubber metal sleeve bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208337.8A CN115992848A (en) | 2021-10-18 | 2021-10-18 | Rubber metal sleeve bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115992848A true CN115992848A (en) | 2023-04-21 |
Family
ID=85992613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111208337.8A Pending CN115992848A (en) | 2021-10-18 | 2021-10-18 | Rubber metal sleeve bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115992848A (en) |
-
2021
- 2021-10-18 CN CN202111208337.8A patent/CN115992848A/en active Pending
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