DE20221500U1 - Assembly of track ring on generated surface of outer race of rolling bearing has shoulder formed in one piece on inner side of track ring in area outside outer bearing race and with inside radius smaller than outside radius of outer race - Google Patents

Abstract

The assembly of a track ring (11) on the generated surface of the outer race (10) of a rolling bearing is solidly constructed in one piece with a shoulder (12) on the inner side of the track ring in an area outside the outer bearing race. The inside radius of the shoulder by a radial step (a1) is smaller than the outside radius of the outer bearing race. The track ring has a second shoulder (13) constructed in one piece with it and formed on the other end face side of the outer race. The inside radius of the second shoulder by a second radial step (a2) is smaller than the outside radius of the outer bearing race.

Description

Territory of invention

The The invention relates to an arrangement of a tensioning or deflection roller for one Traction drive usable race on the outer surface of a bearing outer ring a rolling bearing, in which the race has a larger axial Length as the bearing outer ring and a shape having its axial migration away from the Bearing outer ring prevented.

background the invention

races be used as tensioning or deflection rollers, for example in motor vehicles and used in textile technology. There are produced without cutting Steel race rings pressed onto bearing rings of roller bearings or The bearing rings are pressed into the holes of the steel raceways. In general This results in only a radial interference fit, so that it is in operation can come to the axial migration of the race from the bearing ring. Such a migration may occur in the application of one in this way mounted on the bearing ring raceway in the vehicle to a Cause engine damage.

From the publication DE 91 01 950 U1 is known a role for drive belt, which consists of a drawn from sheet metal roller shell. This has on one side an end portion with contact surfaces for a bearing outer ring, which, however, must be everted radially inwardly and axially reversing. At the end portion, a bearing outer ring, which is located within the sheet metal jacket, is supported axially with its one end face. On the other side of the bearing ring some projections distributed on the circumference are formed on the roller casing for the axial support of the race. In this way, the bearing ring is held in the metal jacket in both axial directions.

Summary the invention

Of the Invention is based on the object, an arrangement of a race on the lateral surface a bearing outer ring to create, in which the initial shape of the race in a simple Way, e.g. by means of the drawing technology or by means of the rolling technology, can be produced.

These Task is inventively characterized solved, that the Race outside one the bearing outer ring surrounding area with an integrally molded shoulder solid accomplished is, which is adjacent to a first end face of the bearing outer ring and whose Inner radius by a radial increment less than the outer radius of the bearing outer ring is. In this way, with simple means a support option in an axial direction for created the race.

Of the Running ring can be outside one the bearing outer ring surrounding area with an integrally formed second shoulder solid executed be, which adjoins the other end face of the bearing outer ring and whose Inner radius to a second radial increment less than outer radius of the bearing outer ring is, wherein the second radial increment is a lower radial Has length measure, as the increment of the shoulder, which at the first end face adjacent the bearing outer ring. This results in for the raceway in the other axial direction a support option.

the same Effect can be Achieve when the raceway outside a surrounding the bearing outer ring Area an insertion area has, on the other end face of the bearing outer ring adjacent and its inner radius by a radial increment greater than the outer radius of the bearing outer ring is, wherein material of the race in the transition region between the outer diameter of the bearing outer ring and the inner diameter of the insertion at least a plurality Peripheral sections formed on the bearing outer ring (caulked) is.

in the Contrary to previous solutions, in which each of the race only by a radial interference fit has been fixed, in the inventive arrangement of the race on the bearing outer ring additionally for radial interference fit with two trained on the race shoulders or with a shoulder and a caulking of the race axially secured by positive engagement, being at both ends of the bearing outer ring the shoulders or caulking are located. With this solution Optionally, the radial interference fit be optimized, which has a direct influence on the bearing clearance of the bearing.

Short description the drawing

embodiments The invention are illustrated in the drawings and compared with a prior art arrangement described in more detail below.

It demonstrate:

1 A first embodiment of an inventive arrangement of a race on a bearing outer ring, in an axial section;

2 a second embodiment of an inventive arrangement of a race on a bearing outer ring, in an axial section;

3 a prior art arrangement of a race on a bearing outer ring, in an axial section.

Full Description of the drawing

An in 3 shown arrangement according to the prior art includes acting as a race roller shell 1 , This is formed from a metal sleeve without cutting and has an everted end portion 2 on that with a contact surface 3 the axial support for a bearing outer ring 4 a ball bearing forms. Between the annular end portion 2 and a protruding section 5 of the roller mantle 1 is an annulus 6 released. Due to the radial distance is the contact surface 3 completely on the side surface 7 of the bearing outer ring 4 and not in the range of its edge shortening 8th , The everting of the end section 2 takes place before mounting on the bearing outer ring 4 , The roller casing 1 becomes on the other side by some circumferentially distributed projections 9 attached. They are formed after insertion of the outer ring of the material and against the side surface of the outer ring.

In the embodiment according to the invention 1 becomes a bearing outer ring 10 a rolling bearing of a raceway 11 surrounded by a press fit. On the inside of the race 11 is in the left area outside the La geraußenringes 10 one shoulder 12 integrally formed. Therefore, this results in a radial increment a ₁ . This is the length difference between the inner radius of the race 11 in the area that the bearing outer ring 10 surrounds (the Preßsitzradius), and the inner radius of the shoulder 12 (the shoulder radius). With the increment a ₁ is an annular contact surface of the race 11 for the left end of the bearing outer ring 10 created. The race 11 is in the axial direction to the right of the bearing outer ring 10 held.

In a similar way is on the inside of the race 11 in the right area outside the bearing ring 10 a second shoulder 13 integrally formed. This results in a second radial increment a ₂ as a difference in length between the inner radius of the race 11 in the area that the bearing outer ring 10 surrounds (the Preßsitzradius), and the inner radius of the second shoulder 13 (the shoulder radius). Therefore, the race becomes 11 also in the axial direction to the left of the bearing outer ring 10 held and can not migrate from this.

The second radial increment a ₂ , however, has a lower length than the radial increment a ₁ , so that the bearing outer ring 10 from the right side into the race 11 used and can be pressed there. It must be the race 11 in the area of the second shoulder 13 expand elastically so that the bearing outer ring 10 in the intended, from the shoulders 12 and 13 formed annular groove of the race 11 can get.

The radial increment a ₁ on the left side of the race 11 can be executed according to the application. It can be for example from 0.1 mm to 5.0 mm. The shoulder 12 is when pressing the bearing outer ring 10 in the raceway 11 not "overpressed." The second radial increment a ₂ on the right side of the race 11 depends on the manufacturing technology and the inner diameter of the second shoulder 13 ,

When using the drawing technology, the following applies:
In the diameter range up to 60 mm, a step change a ₂ of up to 0.05 mm can be achieved. This corresponds to a ratio of up to 60 / 0.05 - 1200. In the diameter range of over 60 mm to 100 mm, a step jump a ₂ of up to 0.1 mm can be achieved. This corresponds to a ratio of up to 100 / 0.1 = 1000.

When using the roller technology, the following applies:
In the diameter range up to 60 mm, a step change a ₂ of up to 0.1 mm can be achieved. This corresponds to a ratio of up to 60 / 0.1 = 600. In the diameter range of over 60 mm to 100 mm, a step jump a ₂ of up to 0.1 mm can be achieved. This corresponds to a ratio of up to 100 / 0.2 = 500.

Furthermore, a _{2 is given} by the field of application. When choosing a ₂ , care must be taken to ensure that no plastic deformation of the race remains after the bearing has been pressed in.

The embodiment according to the invention 2 has a race 14 on, opposite to his left 1 is unchanged and only on its right side, from the bearing outer ring 10 seen from the execution 1 different. Here, a radial increment b is provided as a radial length difference, around which the inner radius or insertion radius of the raceway 14 larger than its Preßsitzradius in the region of the bearing outer ring 10 is. In the area of the plane of the right end face of the bearing outer ring 10 is on the inside of the race 14 a caulking 15 provided, so a material deformation through which the bearing outer ring 10 in its position on the race 14 is held axially.

The radial increment b depends on the rigidity of the component as a result of the component geometry trie. The larger the remaining wall thickness of the Laufrin ges 14 is, the greater the radial increment b can be performed. The greater the radial increment is performed, the better is the positive locking achieved by the caulking. In order to perform the caulking, the radial increment b must have a minimum size of 0.4 mm. The upper limit is the remaining wall thickness for the required stiffness. When caulking make sure that the material deformation no deformation on the outer diameter of the race 14 occurs. The caulking should consist of at least six "noses" (better still eight "noses"), which are evenly distributed around the circumference. For example, a diameter ratio (press fit diameter to nose width) of about 55/3 = 18 would be conceivable The starting shape of the race can be produced both by means of the drawing technology and by means of the rolling technology.

1

Roller coat

2

end

3

contact surface

4

Bearing outer ring

5

protruding section

6

annulus

7

side surface

8th

edges cut

9

head Start

10

Bearing outer ring

11

race

12

shoulder

13

second shoulder

14

race

15

caulking

a ₁

radial increment

a ₂

second radial increment

b

radial increment

Claims (3)

Arrangement of a tensioning or deflection roller for a traction drive usable race ( 11 . 14 ) on the lateral surface of a bearing outer ring ( 10 ) of a rolling bearing, wherein the raceway ( 11 . 14 ) has a greater axial length than the bearing outer ring ( 10 ) and a shape which its axial migration from the bearing outer ring ( 10 ), characterized in that the raceway ( 11 . 14 ) outside of a bearing outer ring ( 10 ) surrounding area with an integrally molded shoulder ( 12 ) is executed solid, which at a first end face of the bearing outer ring ( 10 ) and their inner radius by a radial increment (a ₁ ) less than the outer radius of the bearing outer ring ( 10 ). Arrangement according to claim 1, characterized in that the raceway ( 11 ) outside of a bearing outer ring ( 10 ) surrounding area with an integrally formed second shoulder ( 13 ) is executed solid, which at the other end face of the bearing outer ring ( 10 ) and their inner radius to a second radial increment (a ₂ ) smaller than the outer radius of the bearing outer ring ( 10 ), wherein the second radial increment (a ₂ ) has a smaller radial length dimension than the increment (a ₁ ) of the shoulder ( 12 ), which at the first end face of the bearing outer ring ( 10 ) adjoins. Arrangement according to claim 1, characterized in that the running ring ( 14 ) outside of a bearing outer ring ( 10 ) has an insertion region which at the other end face of the bearing outer ring ( 10 ) and its inner radius by a radial increment (b) greater than the outer radius of the bearing outer ring ( 10 ), wherein material of the raceway ( 14 ) in the transition region between the outer diameter of the bearing outer ring ( 10 ) and the inner diameter of the insertion at least on a plurality of peripheral portions of the bearing outer ring ( 10 ) is molded (caulked).