DE102009018473A1 - Component for fixing two bearings e.g. roller bearings, in bearing shield, has base made of flexible material, element made of metal with smaller elasticity than that of base, and contact areas formed to outer circumference of bearings - Google Patents

Abstract

The component has a base made of a flexible material e.g. elastomer or synthetic rubber, and an element made of metal e.g. stainless steel, with smaller elasticity than that of the base for simplification of an assembly. Contact areas provided for bearings are formed accordingly to an outer circumference of the bearings. The elastomer has shore hardness between 60 and 70. The element is implemented as a plate molded at the base.

Description

The The invention relates to a component for fixing at least two bearings in a bearing plate and a bearing plate for the recording of at least two juxtaposed bearings, in particular Rolling bearings, each having an axis of rotation, wherein the end shield has at least two cylindrical seats for receiving the outer ring of each bearing whose circumference runs in the direction of the axis of rotation of the bearings, and wherein the cylindrical seats for the at least two bearings merge into each other and the contour form an eight, wherein between crossing points of the cylindrical seats a center bar is used.

End shields of the type mentioned are known. If, for example, two parallel shafts in a gear must have a fairly small distance from each other, it may be necessary to approximate the respective shaft bearings to such an extent that forms in the bearing plate, which carries the bearing, the contour of an eight, because not enough space is available to completely cover the outer rings of the respective bearings (see DE 198 05 237 . DE 298 02 288 U1 . DE 298 09 031 U1 ).

at the previously known bearing plates, the two are quite close to each other to be arranged bearing in accordance deep-drawn seats used in the bearing plate and, for example, by a caulking axially fixed. At particularly high loads during operation it can however, be that the bearing outer rings in their seats loosen in the end shield. This is due to the during the operation occurring flexing, starting from the waves also extends to the camps and there gradually a release of the axial fixation of the bearing outer rings leads.

It is also possible, alternatively to caulking by a Welding process, with the other components for reinforcement be attached to accomplish a secure axial fixing of the bearings. However, this is due to the very high lot sizes in the automotive sector for cost reasons no acceptable Solution.

From the DE 199 19 20 C1 It is known in the space between the two bearings to use a component of the type mentioned as a central web with interference fit. This results in an additional fixation of the bearing in the bearing plate. In addition, an ovality of the bearings resulting from the caulking process is eliminated by the central web, which leads to an increase in the reliability.

Of the Invention is based on the object, a component and a bearing plate develop the aforementioned genus such that it with relative low effort is possible, an improved axial Determining the bearing rings to achieve a simple installation.

These The object is achieved by a component having the features of claim 1 and a bearing plate with the features of claim 11. Advantageous embodiments of the invention are the subject of the dependent Claims.

According to claim 1 is a component for fixing at least two bearings in one End plate specified, comprising a base body an elastic material, wherein the component is at least one element made of a material with less elasticity than the main body includes for ease of assembly. The invention is based on the knowledge that the known components for fixing two Bearing in end shield (center bar) due to their choice of material, in Generally, steel was used to cause assembly problems led. So can be used in particular Mittelstege, the entire Fill volume between the two bearings of the bearing plate should press hard between the bearings without damaging them or to burden. By using a center bar with a Basic body made of an elastic material is the assembly of the component between the bearings in the end plate simplified. The compared to known embodiments made of steel softer, more elastic Material of the body can be during assembly the structural conditions and manufacturing tolerances of the camp without adjust too much force. The elasticity of the main body is preferably higher than that to be of steel. However, only the basic body turns off used the elastic material, so under some circumstances occurs such large deformation due to manufacturing tolerances the other components on, that the assembly only under difficult Conditions is possible. Therefore, the component comprises at least an element made of a material with less elasticity than the main body. It is therefore possible by applying pressure on the element assembly without additional deformation or damage to the body. An impairment of the supporting function of the body is thus avoided.

In an advantageous embodiment of the invention, the base body consists of an elastomer. This has the particular advantage that, due to its sufficiently high elasticity, it allows a compensation of manufacturing tolerances with simple assembly. At the same time, the strength of elastomers is so high that the axial securing of the bearings in the end shield is ensured by the component. Particularly advantageously, the elastomer has a Shore hardness between 60 and 70. In this A simple assembly and a tolerance compensation are possible, at the same time sufficiently high hardness for the axial fixation of the bearing.

In An advantageous embodiment of the invention is each of the elements formed flat, with each contact surface to one of the bearings is occupied by one of the elements. Thus located between the example elastomeric body and the camp each have a thin layer of the material lesser Elasticity. This can be for example a metal sheet. Especially in the latter case, the assembly of the component is characterized makes it easier to easily insert the component despite the Press fit through the contact of the element with the respective outer ring of the bearing in the bearing plate is possible. A direct contact of the main body with the outer rings of the bearings is thus prevented.

In an alternative embodiment of the invention is the Element arranged in the main body as a core. It can do that For example, as a central web within the body be formed. Through the formation of the element as the core center in the body is a force application during assembly as a press fit on the body itself not necessary. The power is absorbed by the element in the core of the Body. Thus, damage to the Body avoided by excessive force on this.

According to claim 11 is a bearing plate for the inclusion of at least two juxtaposed bearings, in particular rolling bearings indicated, each having a rotation axis, wherein the end shield at least two cylindrical seats for the Receiving the outer ring each having a bearing whose Extending in the direction of the axis of rotation of the bearing, where the cylindrical seats for the at least two bearings merge into each other and the contour. an eight form, between transition points of the cylindrical Sitting surfaces a center bar is inserted. The central pier is designed as a component according to one of claims 1 to 10. In the bearing plate according to the invention is a Component according to the invention with all its above specified advantages used.

The due to design open eight in the bearing plate, which is due to The very close approximated bearing is formed by again "locked" that a central pier in that open area is used. This has the consequence that in operation, for example, the transmission, the walking of the waves can no longer affect the shape that the bearing outer rings gradually dissolve; Rather, it is introduced by the Mittelsteg certainly accomplished that a durable durable composite preserved in the end shield.

By Selection of the appropriate fit is reliably ensured that even with the greatest possible transmission load the middle bridge can not solve. Furthermore, it can be provided be that the center bar in the area of the crossing points the cylindrical seats are welded to the end shield, in particular laser welded, is. Furthermore, it is possible that the center bar in or between the contact surfaces fixed by caulking the surrounding material of the bearing plate is.

at Use of the central web according to claims 1 to 10 its advantages compared to known solutions made of steel. Leaves through the elastic material with sufficient supportive effect a compensation of manufacturing tolerances and caused by caulking changes achieve.

By All these options will make it a lot easier and thus cost-effective way possible, the center bar Fast to insert and secure, so it works is excluded that the bearings from their axial anchorage to be able to solve.

advantageously, is provided that the center bar with its underside on one Part of the side portion of the outer rings of the bearing presses and axially fixes the bearings. In this case, the middle bridge fixed so that it has a bias voltage on the side of a Part of the bearing outer ring exercises and thus the Axial fixing of the outer rings accomplished.

The Investment surfaces can advantageously with a precisely given depth in the direction of the axis of rotation of the bearing stamped be. This will make it possible for the center bar to be flush closes with the side surface of the bearing rings or sunk opposite the side surface is. To create an exact bias of the center bar between his Contact surfaces can be provided that the contact surfaces in the direction perpendicular to the axis of rotation of the bearings and perpendicular to the connecting line between the centers of the bearings in one predetermined distance are imprinted.

Training is according to further provided that the shape of the central web in its side regions the contour of the outer rings of the bearing corresponds. To increase the rigidity of the composite can be provided that the central web has at least one stiffening rib.

The central web can continue to be formed in the direction of the axis of rotation of the bearing so that it at least substantially the volume between the outer rings of the bearings and the transition region of the Fills in seating areas. Finally, it can be considered that the outer rings of the bearings are axially fixed in their respective cylindrical seats by caulking the end of the seats in the bearing plate.

• a) Anprägen mindestens zweier Anlageflächen im Bereich der Übergangsstellender zylindrischen Sitzflächen;
• b) Einsetzen eines Mittelsteges, vorzugsweise nach einem der Ansprüche 1 bis 10 in bzw. zwischen die Anlageflächen, wobei der Mittelsteg zwischen die Anlageflächen mit Presspassung eingesetzt wird.

A method for fixing at least two bearings in a bearing plate, in which the outer rings of at least two juxtaposed bearings, preferably roller bearings are arranged in cylindrical seating surfaces, wherein the cylindrical seats for the at least two bearings merge into each other and form the contour of a figure eight, is according to the invention characterized by the steps:

• a) embossing at least two contact surfaces in the region of the transition points of the cylindrical seating surfaces;
• b) inserting a central web, preferably according to one of claims 1 to 10 in or between the contact surfaces, wherein the central web is inserted between the contact surfaces with a press fit.

The Stability of the network continues to increase, if it is foreseen that the middle bridge in the area of the crossing point, the cylindrical seats are welded to the end shield, especially laser welded, is. After all It is advantageous if the central web in or between the contact surfaces fixed by caulking the surrounding material of the bearing plate becomes.

In the drawing embodiments of the invention are illustrated.

1 shows the top view of a known bearing plate, in

2 is the section AA according to 1 to see in

3 is the section BB according to 1 to recognize

4 shows a component according to a first embodiment of the invention,

5 shows a component according to a second embodiment of the invention

6 shows an embodiment of a bearing plate, the

7 and the

8th provide for this embodiment, the corresponding figures 2 and 3 represents,

In 1 is a bearing shield 1 to recognize, in the two rolling bearings 2 . 3 are arranged. The bearing outer rings 10 . 11 the storage 2 . 3 are in cylindrical seats 4 used. The centers M of the bearings 2 . 3 are by design arranged so close to each other that not enough space remains that the cylindrical seats 4 completely around the outer rings 10 . 11 could extend. Rather, there is a transitional area 14 the seats 4 in which there is no lateral support for the cylindrical seats 4 is allowable. Consequently, when looking at the two bearings, the contour of an eight results.

At the crossing points 5 . 6 the cylindrical seats 4 are contact surfaces 7 . 8th stamped on. For this purpose, in a known manner, the metallic material of the bearing plate 1 subjected to an embossing process, whereby the contact surfaces 7 . 8th with a defined depth t (see 3 ) and with a defined distance A between the contact surfaces 7 . 8th be attached.

The contact surfaces 7 . 8th are designed to be a middle bridge 9 after mounting the rolling bearings 2 . 3 can be mounted in the bearing plate. This middlebridge 9 has a slight oversize - compared to the dimension A - so that he pressfit between the contact surfaces 7 . 8th can be used. The page areas 12 and 13 of the central pier 9 are designed so that they the outer contour of the outer rings 10 . 11 the storage 2 . 3 correspond.

As based on the 2 and 3 becomes apparent while pressing the bottom 15 of the central pier 9 against a part of the page area 16 the outer rings 10 . 11 , In this way, the middle bridge represents 9 an axial fixation of the bearings 2 . 3 in the bearing plate 1 for sure. This is the middle bridge 9 so arranged - which by the corresponding production of the embossed contact surfaces 7 . 8th is made possible - that the side surface S of the bearing rings (see 3 ) through the central pier 9 runs undisturbed; It can also be provided that the center bar 9 is arranged slightly sunk.

In the 4 is a central web according to a preferred embodiment of the invention shown. It consists of a basic body 101 whose shape substantially corresponds to the gap between the bearings arranged in the bearing plate. Two contact surfaces associated with the outer rings of the bearings 103 are curved inwards and adapted to the outer diameter of the bearings in the end shield in which the component is to be inserted. Each of the contact surfaces 103 is with a thin sheet 105 busy. The sheet 105 For example, has a thickness of 0.3 mm and is made of ST37 steel. For connection to the main body 101 can the sheet 105 for example, anvulkani be siert. Alternatively, the arrangement shown can be produced in a 2-component injection molding machine.

By using the sheets 105 at the contact surfaces 103 becomes a direct contact of the main body 101 avoided with the outer rings of the bearings in the bearing plate. This has advantages, especially in the installation of the central web, since the sheets 105 slide well on the outer rings of the bearings. In addition, no pressure for pressing on the body 101 themselves, which could damage it due to its elasticity, which in turn would compromise its stabilizing properties. Instead, the pressure for the press fit on the sheets can be 105 exercise.

In the 5 an alternative embodiment of a central web is shown. In this embodiment, a mounting element is centered in the component 151 arranged. The mounting element 151 is from the softer body 153 surround. The main body 153 has substantially the same shape as the central web in 4 on. Again, the contact surfaces 155 domed to the outer rings of the bearings and adapted to the diameters of the outer rings. For mounting the center bar in the 5 It is possible, the pressure required for the press fit on the mounting element 151 exercise. Damage to the soft base 153 is thereby effectively avoided also in this embodiment. The mounting element consists for example of Pa 4.6 30% GF. The main body 153 For example, consists of NBR 60. Thus, the mounting element has a higher strength than the main body 153 on.

The 6 . 7 and 8th show embodiment of a bearing plate, the in the 1 . 2 and 3 illustrated known embodiment further developed. Here, however, comes an inventive center bar 9 according to the 4 or 5 to use the shaped so that the volume in the transition area 14 the seats 4 is largely filled with the bridge. This makes it possible to achieve a further stabilization of the composite compared to known solutions.

According to the method, the mounting of the bearing in the bearing plate is done so that - before or after the onset of the camp 2 . 3 in their respective cylindrical seat 4 - the end shield 1 an embossing process is subjected such that the contact surfaces 7 . 8th be precisely formed. Then then the center bar 9 be used, reducing the transition area 14 between the seats 4 Is "closed". For this purpose, preferably a press fit between the contact surfaces 7 and 8th and the central pier 9 intended. Additionally or alternatively it is possible to use the center bar 9 in the bearing plate 1 to caulk, so surrounding material to the center bar 9 by a forming process of the material of the end shield 1 "Zoom push".

By the introduction of the central web according to the 4 or 5 is achieved that an ovality can be eliminated again, which usually sets when two camps are used in the usual way in the generic bearing plate and caulked there. In this way, the running behavior and the service life of the bearings improve.

1

end shield

2, 3

roller bearing

4

cylindrical seat

5, 6

Crossing points the cylindrical seats

7, 8th

contact surfaces

9

center web

10 11

Outer rings of the bearings 2 . 3

12 13

Side areas of the center bar 9

14

Transition area of the seats 4

15

Bottom of the center bridge 9

16

Part of the side area of the outer rings 10 . 11

D

Rotary axis of the bearings 2 . 3

U

Circumference of the cylindrical seat 4

S

side surface the bearing rings

M

Center of the camp 2 . 3

A

Distance between the contact surfaces 7 . 8th

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19805237 [0002]
• - DE 29802288 U1 [0002]
• - DE 29809031 U1 [0002]
• - DE 1991920 C1 [0005]

Claims (14)

Component for fixing at least two bearings in a bearing shield, comprising a main body of a elastic material, wherein the component comprises at least one element a material with less elasticity than the main body includes for ease of assembly. Component according to claim 1, wherein the contact surfaces are provided to the camps, the outer Scope of bearings are shaped accordingly. Component according to claim 1 or 2, wherein the basic body consists of an elastomer. Component according to claim 3, wherein the elastomer is a Shore hardness between 60 and 70 has. Component according to one of claims 1 to 4, in which each of the elements is formed flat and each Contact surface to one of the bearings with one of the elements is occupied. A component according to claim 5, wherein the element is made of a metal exists. Component according to claim 6, wherein the metal ST37 is. Component according to one of the above claims, in which each element vulcanized as a to the body Sheet metal is executed. Component according to one of claims 1 to 4, in which the element is arranged in the main body as a core is. A component according to claim 9, wherein the core is made of PA 4.6 and the base body consists of a synthetic rubber. End shield ( 1 ) for receiving at least two juxtaposed bearings ( 2 . 3 ), in particular rolling bearings, each having a rotation axis (D), wherein the end shield ( 1 ) at least two cylindrical seats ( 4 ) for receiving the outer ring ( 10 . 11 ) each of a warehouse ( 2 . 3 ) whose circumference (U) in the direction of the axis of rotation (D) of the bearings ( 2 . 3 ), wherein the cylindrical seating surfaces ( 4 ) for the at least two bearings ( 2 . 3 ) merge into one another and form the contour of an eight, whereby between crossing points ( 5 . 6 ) of the cylindrical seats ( 4 ) a middle bridge ( 9 ) is inserted, characterized in that the central web is designed as a component according to one of claims 1 to 10. A bearing plate according to claim 11, wherein between the crossing points ( 5 . 6 ) Contact surfaces ( 7 . 8th ) for the middle bridge ( 9 ) are imprinted. Bearing shield according to claim 11 or 12, wherein the middle web ( 9 ) in or between the contact surfaces ( 7 . 8th ) by caulking the surrounding material of the end shield ( 1 ) is fixed. Bearing shield according to one of claims 11 to 13, wherein the middle web ( 9 ) with its underside ( 15 ) to a part of the page area ( 16 ) of the outer rings ( 10 . 11 ) the storage ( 2 . 3 ) and the bearings ( 2 . 3 ) sets it axially.