DE102009004653B4 - Method for producing a bearing arrangement and bearing arrangement - Google Patents

Abstract

Method for producing a bearing arrangement (1), which comprises a bearing carrier (2) and at least one bearing (4) inserted into a circular recess (3) in the bearing carrier (2), the bearing (4) having a bearing outer ring (5), which has a groove-like recess (6) on its outer circumference at least over part of its circumference, a positive connection being produced between the bearing carrier (2) and the bearing outer ring (5) by a forming tool (7) attaching at least one to the groove-like Recess (6) of the bearing outer ring (5) adjacent section (8) of the bearing carrier (2) is deformed so that the deformed section enters radially inwards into the groove-like recess (6) and seen in the axial direction (a) of the bearing (4). Undercut (9) forms, the deformation of the section (8) of the bearing carrier (2) adjacent to the groove-like recess (6) of the bearing outer ring (5) taking place by pressing the forming tool (7) onto the material of the bearing carrier (2) to be formed is, wherein the forming tool (7) has a non-planar contour on its contact surface (10) to the bearing support (2), the contact surface (10) of the forming tool (7) being convex and arcuate when viewed in the radial direction (r) or wherein the contact surface (10) of the forming tool (7) has a tip.

Description

The invention relates to a method for producing a bearing arrangement which comprises a bearing carrier and at least one bearing inserted into a circular recess in the bearing carrier, the bearing having a bearing outer ring which has a groove-like recess on its outer circumference at least over part of its circumference, the A form-fitting connection between the bearing carrier and the bearing outer ring is produced in that a forming tool deforms at least one section of the bearing carrier adjacent to the groove-like recess of the bearing outer ring in such a way that the deformed section enters the groove-like recess radially inwards and seen in the axial direction of the bearing Undercut forms. The invention further relates to a bearing arrangement.

From the publication DE 103 29 433 A1 a method for producing a bearing arrangement is known, which includes a bearing carrier with a circular recess. A bearing is inserted into the recess. The bearing has a bearing outer ring which has a groove-like recess on its outer circumference. A form-fitting connection between the bearing carrier and the bearing outer ring is produced by a forming tool deforming a section of the bearing carrier adjacent to the groove-like recess in such a way that the deformed section enters the groove-like recess radially inwards and forms an undercut when viewed in the axial direction of the bearing . The section of the bearing carrier adjacent to the groove-like recess of the bearing outer ring is deformed by pressing the forming tool onto the bearing carrier material to be formed. The forming tool has a non-flat contour on its contact surface with the bearing support.

Attaching a bearing carrier to an outer ring of a bearing is also possible DE 200 19 278 U1 known. This shows a similar solution DE 101 07 109 A1 .

Bearing supports formed from sheet metal are required, for example, to store transmission shafts in a car transmission. For this purpose, an initial part is provided in the form of a sheet metal, which is formed into the bearing support by punching and forming processes. In particular, a circular recess is machined into the sheet metal of the bearing support for a bearing to be held. According to a previously known solution, it is provided that the bearing is fixed to the bearing carrier in such a way that an annular groove is machined into the outer ring of the bearing. Radially projecting extensions on the bearing support extend into this. This creates a positive connection between the bearing support and the bearing, which is often sufficient for corresponding applications.

In order to create the radially projecting extensions in the bearing carrier, a forming process is carried out (caulking process). In this case, material of the bearing carrier is deformed using a stamp at several circumferential points around the bearing outer ring in such a way that it extends radially into the annular groove of the bearing outer ring as an undercut.

In the 0 and 1 Such a solution is shown according to the state of the art. The bearing arrangement 1 shown has a bearing carrier 2 which has a circular recess 3 for a bearing 4 to be held with a bearing outer ring 5. The bearing outer ring 5 has a groove-like depression 6 in the form of a circumferential annular groove. Material of the bearing carrier 2 was deformed at three defined sections 8 using a flat stamp (not shown) so that it extends radially into the area of the annular groove 6. Accordingly, there is an undercutting extension 9, which ensures protection against loss between the bearing carrier 2 and the bearing 4.

Can be seen in 1 the newly formed embossing surface 16, which comes from the embossing punch that is used as a forming tool. With the flat forming tool in the form of a stamp, material of the bearing carrier 2 is pressed radially inwards into the annular groove 6 of the bearing outer ring 5, so that the undercutting extension 9 is created. The size of the undercut is indicated by d. Due to the distance b of the undercutting extension 9 from the axial end of the annular groove 6, there is play. Accordingly, in the present case, only a captive protection between the bearing carrier 2 and bearing 4 is desired and provided.

The previously known flat caulking surface (embossing surface 16) leads to a fixed caulking force direction. However, the caulking area in the bearing carrier 2 can have a variable rigidity. This is always the case, for example, when the caulking does not shift the displaced material evenly in all directions, but rather in a specific direction. This results in transverse forces in the forming tool (caulking punch), which can lead to bending stress on the forming tool and thus to premature tool breakage. This entails high costs, loss of time for additional setup and the risk of incomplete caulking.

The invention is therefore based on the object of proposing a method of the type mentioned at the outset and a corresponding bearing arrangement with which the mentioned requirements parts can be avoided. The aim is to find a process-reliable, simple and cost-effective solution for captively caulking the bearing carrier to the bearing. The aim is to reduce the load on the forming tool required for the caulking process, resulting in a longer service life. Furthermore, the risk of incorrect caulking should be reduced.

This task is solved by the features of patent claim 1.

The tip can be formed by two flat surfaces that merge into one another in a rounded manner at their meeting point.

The contact surface of the forming tool can have an arcuate boundary when viewed in the axial direction of the bearing. A semicircular boundary is preferred.

The forming tool is preferably pressed onto the bearing carrier in the axial direction of the bearing in order to carry out the forming process.

The bearing carrier can be deformed at several points around the circumference of the bearing outer ring using the forming tool. Particularly preferably, it is provided that the bearing carrier is deformed with the forming tool at three or four equidistantly spaced locations around the circumference of the bearing outer ring.

The proposed bearing arrangement, which comprises a bearing carrier and at least one bearing inserted into a circular recess in the bearing carrier, the bearing having a bearing outer ring which has a groove-like recess on its outer circumference at least over part of its circumference, wherein a positive connection between the bearing carrier and the bearing outer ring is given by at least one section of the bearing carrier adjacent to the groove-like recess of the bearing outer ring being deformed in such a way that the deformed section enters the groove-like recess radially inwards and forms an undercut when viewed in the axial direction of the bearing, is such that the surface the deformed section of the bearing carrier adjacent to the groove-like recess of the bearing outer ring has a non-planar shape, the surface having a concave shape at least in sections and being arcuate when viewed in the radial direction.

The surface can also have an arcuate, in particular semicircular, boundary when viewed in the axial direction of the bearing.

The bearing support preferably consists of a substantially flat sheet metal. The groove-like depression in the bearing outer ring is preferably designed as a circumferential annular groove.

The inventive concept therefore provides that the forming tool (caulking stamp) is in the area of the caulking surface - i.e. H. the surface with which the punch dips into the material of the bearing support and determines the shape of the caulking - has a surface that deviates from the planar (flat) shape. A rounded surface is primarily intended (generally spherical in shape), although roof-shaped designs of the surface are also possible.

The non-planar and in particular rounded contact surface of the forming tool on the bearing support material to be formed, which can be achieved with the procedure according to the invention, leads to a more flexible distribution of the caulking force direction. This results in lower resulting transverse forces than is the case when the forming tool has a flat contact surface with the material to be formed. This reduces the risk of premature tool breakage. This advantageously results in a longer service life. Furthermore, there are lower costs for setup and higher process reliability.

The non-planar design of the stamp tip, i.e. H. The formation of the contact surface of the forming tool as a bulged, rounded, pointed or similar structure advantageously results in fewer cracks occurring at the edges of the formed material areas.

With the proposed forming tool it is also possible to get past projections of the bearing ring with the material to be formed more easily than is the case with a planar contact surface. This allows the axial play of the fastening (see play b in 2 ) can be reduced.

Although the method is preferably practiced on a pre-embossed surface of the bearing support (see pre-embossing 17 in the figures), it is also possible to work without such pre-embossing.

The method and the bearing arrangement are preferably applied or used in car transmissions in order to hold bearings in the required position. However, applications in which bearings are generally possible are also possible should be connected to a holding element by caulking.

• 0 die Draufsicht auf eine Lageranordnung mit Lagerträger und Lager, wobei von dem Lagerträger nur ein Ausschnitt dargestellt ist,
• 1 den Schnitt C-C gemäß 1 durch eine Lageranordnung gemäß dem Stand der Technik,
• 2 den Schnitt C-C gemäß 1 durch eine Lageranordnung gemäß der Erfindung,
• 3 die Ansicht gemäß 2 in vergrößerter teilperspektivischer Darstellung,
• 4 den Schnitt C-C gemäß 1 durch eine Lageranordnung gemäß der Erfindung, wobei der Verstemmprozess mit einem Umformwerkzeug illustriert ist,
• 5 den Schnitt Z-Z gemäß 4, d. h. die Ansicht in radiale Richtung,
• 6 die Draufsicht auf den Lagerträger mit drei verformten Stellen (Verstemmstellen),
• 7 die Einzelheit „X“ gemäß 6,
• 8 die Ansicht „E“ gemäß 7,
• 9 ein Umformwerkzeug in Form eines Verstemmstempels in radialer Richtung seines Einsatzes gesehen, gemäß einer ersten Ausführungsform der Erfindung,
• 10 die zu 9 entsprechende Seitenansicht,
• 11 ein Umformwerkzeug in Form eines Verstemmstempels in radialer Richtung seines Einsatzes gesehen, gemäß einer zweiten Ausführungsform der Erfindung, und
• 12 die zu 11 entsprechende Seitenansicht.

The drawing shows exemplary embodiments of the invention. Show it:

• 0 the top view of a bearing arrangement with bearing carrier and bearing, with only a section of the bearing carrier being shown,
• 1 according to the section CC 1 by a bearing arrangement according to the prior art,
• 2 according to the section CC 1 by a bearing arrangement according to the invention,
• 3 according to the view 2 in an enlarged partial perspective view,
• 4 according to the section CC 1 by a bearing arrangement according to the invention, wherein the caulking process is illustrated with a forming tool,
• 5 according to the cut ZZ 4 , i.e. the view in the radial direction,
• 6 the top view of the bearing carrier with three deformed points (caulking points),
• 7 the detail “X” according to 6 ,
• 8th according to view “E”. 7 ,
• 9 a forming tool in the form of a caulking punch seen in the radial direction of its use, according to a first embodiment of the invention,
• 10 the to 9 corresponding side view,
• 11 a forming tool in the form of a caulking punch seen in the radial direction of its use, according to a second embodiment of the invention, and
• 12 the to 11 corresponding side view.

In 0 the basic structure of the bearing arrangement 1 is shown. The arrangement has a bearing carrier 2 with a circular recess 3 for the bearing outer ring 5 of a rolling bearing 4.

In the 2 to 8 An embodiment of the present invention is illustrated.

There are three deformed points 12, 13, 14 equidistant around the circumference of the bearing outer ring 5 (see Fig. 6 ) are provided, on which sections 8 of the bearing carrier 2 are deformed, ie caulked, so that some material of the bearing carrier 2 extends radially inwards and forms an undercutting extension 9 (see Fig. 2 , 3 and 7 ), which engages in the annular groove 6 of the bearing outer ring 5 (see. 2 , 3 and 4 ). This creates an undercut with a size d, as shown in 2 is registered.

The caulking, ie the production of the undercut extension 9 (see. 2 , 3 and 7 ) is carried out with a forming tool 7 in the form of an embossing stamp, as shown in the 4 and 5 you can see. The forming tool 7 has a contact surface 10 with which it contacts the material of the bearing carrier 2 to be formed. Like it in 4 and 5 can be seen, this contact surface 10 is not flat, but rather spherical (convex). Due to this shape of the contact surface 10, a corresponding (concave) shape of the surface 15 of the formed section of the bearing support 2 results in a congruent manner, as can be seen from the synopsis of 2 , 3 , 7 and 8th emerges. The formed area is closed off by a semicircular boundary 11 in the area facing away from the bearing. As a result of the forming process, the material of the bearing carrier 2 emerges from the basic contour of the circular recess 3 by an amount c (see Fig. 7 ). Seen from a radial perspective, the surface 15 is designed in the shape of a circular arc, which is indicated by the entered radius R (see Fig. 8th ).

In the 9 to 12 Two variants of the forming tool 7 used can be seen (each from the front and from the side). In the solution according to 9 and 10 there is a contact area 10 with a (circular) arc-shaped design. In the embodiment according to 11 and 12 the contact area 10 is formed by two flat surfaces 10' and 10", which together form a tip which is rounded at the transition between the two surfaces 10', 10". The entry of the respective axial direction a and the radial direction r indicates how the forming tool 7 is placed or used when producing the caulking.

Reference symbol list

1

Storage arrangement

2

Bearing carrier

3

circular recess

4

Bearings (rolling bearings)

5

Bearing outer ring

6

groove-like depression (ring groove)

7

forming tool

8th

Section

9

undercutting process (undercut)

10

Contact surface of the forming tool

10'

newly formed area

10"

newly formed area

11

arcuate boundary

12

deformed place

13

deformed place

14

deformed place

15

Surface of the deformed section

16

embossing surface

a

Axial direction

r

radial direction

b

Game

c

radial projection

d

Undercut size

R

radius

Claims (11)

Method for producing a bearing arrangement (1), which comprises a bearing carrier (2) and at least one bearing (4) inserted into a circular recess (3) in the bearing carrier (2), the bearing (4) having a bearing outer ring (5), which has a groove-like recess (6) on its outer circumference at least over part of its circumference, a positive connection being produced between the bearing carrier (2) and the bearing outer ring (5) by a forming tool (7) attaching at least one to the groove-like Recess (6) of the bearing outer ring (5) adjacent section (8) of the bearing carrier (2) is deformed so that the deformed section enters radially inwards into the groove-like recess (6) and seen in the axial direction (a) of the bearing (4). Undercut (9) forms, the deformation of the section (8) of the bearing carrier (2) adjacent to the groove-like recess (6) of the bearing outer ring (5) taking place by pressing the forming tool (7) onto the material of the bearing carrier (2) to be formed is, wherein the forming tool (7) has a non-planar contour on its contact surface (10) to the bearing support (2), the contact surface (10) of the forming tool (7) being convex and arcuate when viewed in the radial direction (r) or wherein the contact surface (10) of the forming tool (7) has a tip. Procedure according to Claim 1 , characterized in that the tip is formed by two flat surfaces (10 ', 10"), which merge into one another in a rounded manner at their meeting point. Procedure according to Claim 1 or 2 , characterized in that the contact surface (10) of the forming tool (7) has an arcuate boundary (11) when viewed in the axial direction (a) of the bearing (4). Procedure according to Claim 3 , characterized in that the contact surface (10) of the forming tool (7) has a semicircular boundary (11) when viewed in the axial direction (a) of the bearing (4). Procedure according to one of the Claims 1 until 4 , characterized in that the forming tool (7) is pressed onto the bearing carrier (2) in the axial direction (a) of the bearing (4) in order to carry out the forming process. Procedure according to one of the Claims 1 until 5 , characterized in that the bearing carrier (2) is deformed around the circumference of the bearing outer ring (5) at several points (12, 13, 14) with the forming tool (7). Procedure according to Claim 6 , characterized in that the bearing carrier (2) is deformed with the forming tool (7) at three or four equidistantly spaced locations (12, 13, 14) around the circumference of the bearing outer ring (5). Bearing arrangement (1), which comprises a bearing carrier (2) and at least one bearing (4) inserted into a circular recess (3) in the bearing carrier (2), the bearing (4) having a bearing outer ring (5) on its outer circumference has a groove-like depression (6) at least over part of its circumference, with a positive connection between the bearing carrier (2) and the bearing outer ring (5) being provided by at least one section adjacent to the groove-like depression (6) of the bearing outer ring (5). (8) of the bearing carrier (2) is deformed in such a way that the deformed section enters the groove-like recess (6) radially inwards and, viewed in the axial direction (a) of the bearing (4), forms an undercut (9), produced according to one of Claims 1 until 7 , wherein the surface (15) of the deformed section (8) of the bearing carrier (2) adjacent to the groove-like recess (6) of the bearing outer ring (4) has a non-planar shape, the surface (15) having a concave shape at least in sections and is arcuate when viewed in the radial direction (r). Storage arrangement according to Claim 8 , characterized in that the surface (15) has an arcuate boundary (11) when viewed in the axial direction (a) of the bearing (4). Storage arrangement according to Claim 8 or 9 , characterized in that the bearing support (2) consists of a substantially flat sheet metal. Bearing arrangement according to one of the Claims 8 until 10 , characterized in that the groove-like recess (6) in the bearing outer ring (5) is designed as a circumferential annular groove.

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