DE102008030224A1 - Ball bearing assembly for non axial loads has the bearing balls secured by a snap fitting attached to the main outer seal of the bearing - Google Patents

Abstract

A ball bearing assembly for non axial loads has the bearing balls (8) held between outer and inner races (2, 5) each with shoulders (4, 7) on a diagonal thrust track and with a cage (10) at one end and an outer main seal (11) at the other end. The main seal has a metal reinforcing (19) angled to extend along the cylindrical section of the outer race and with an angled tip (21, 22) to locate against the ball bearings. The reinforcing includes a ratchet grip (24) to locate into a ring groove inside the outer race, to assist with the assembly of the bearing.

Description

Field of the invention

The The invention relates to a skewed roller bearing according to preamble-forming features of claim 1, and in particular advantageous to single-row angular contact ball bearings for storage the secondary flywheel mass of dual mass flywheels feasible in motor vehicles but also for other applications suitable in automotive or engineering.

Background of the invention

From the DE 35 13 722 A1 a generic single-row angular contact ball bearing is known, which consists essentially of an outer bearing ring with a arranged on the inside of the raceway and an inner bearing ring with a arranged on the outside of the raceway and a plurality of rolling in a series in the raceways of the bearing balls bearing balls, respectively have an angle to a bearing radial axis inclined pressure angle axis and held by a bearing cage in the circumferential direction at regular intervals to each other. The space between the bearing rings is at least axially sealed on one side by a sealing element and the two raceways in the bearing rings are each bounded on the one hand by diagonally opposite shoulders on which the bearing balls are supported in one-sided axial load. On the other hand, the raceways in the bearing rings on the other hand go shoulderless in a flat Axialringfläche and are limited by a arranged on this Axialringfläche flat board, which is designed as a circumferential axial securing against unintentional disassembly of the angular contact bearing.

The installation of such angular contact ball bearings, in which the raceway in the inner bearing ring next to the shoulder for axial load support can also be limited by a second shoulder, takes place mostly in such a way that the bearing cage is placed on the inner bearing ring, then the bearing balls are snapped into the bearing cage and finally the outer bearing ring is pushed with the adjoining his career flat Axialringfläche ahead of the ball row in the inner bearing ring. In this case, arranged on the flat Axialringfläche the outer bearing ring flat board, which also, as in the DE 10 2004 014 775 A1 , as so-called, formed by a flat annular bead on the flat Axialringflächen both trained with one-sided shoulderless races bearing ring formed snap can be overcome under slightly elastic deformation by increased force, so that finally the angular contact ball bearing is connected to a permanent assembly and unintentional disassembly during handling or during installation of the same is avoided.

Another way to avoid unintentional disassembly of an angular contact ball bearing or accidental slipping or sliding out of a one-sided shoulderless raceway bearing ring of the ball row in the other bearing ring was DE 102 39 742 A1 disclosed. In this document, it is proposed that one of the two bearing cages of a double-row angular contact ball bearing is designed as a plastic window cage and is provided on an axial side with a plurality of uniformly circumferentially distributed barb-shaped retaining lugs on the / in the other bearing ring in the on / insertion of a bearing ring engage an associated groove in a mitti gene Axialringfläche on one of the bearing rings and thereby connect the angular contact ball bearings also to a permanent assembly.

When However, it has a disadvantage in the known solutions proved that when using a flat board or a snap as axial protection against unintentional disassembly of the angular contact ball bearing the board or the snap stage only a maximum allowable Height of 50 microns, as it is at a higher trained board or at a higher trained snap stage otherwise while overcoming the same to plastic deformation and / or damage can come from bearing components. Such a small onboard or However, snap height ensures as well as the locking connection of the bearing rings described above additional retaining lugs on the bearing cage only one very limited self-mounting, for example in the completion of dual-mass flywheels whose Secondary flywheel have a mass of up to 15 kg may not be enough to disassemble on its own of the angular contact ball bearing during transport of the dual mass flywheel to avoid. The occurring forces act normal stress direction of the angular contact ball bearing, so that this is pulled apart and thus it can happen that the Schnappstufe or the holding force of the latching connection overcome automatically and thus besides malfunctions of warehouse function too causes an increased accident risk.

Object of the invention

Based on the stated disadvantages of the solutions of the known prior art, the invention is therefore the object of a Schrägflälzlager, in particular single-row angular contact ball bearings, to design, which has a circumferential axial securing, with a self permanent disassembly of the angular contact ball bearing, especially when transporting equipped with such an angular contact ball bearing dual mass flywheel, is certainly avoidable.

Description of the invention

According to the invention this task in a Schrägwälzlager after the Preamble of claim 1 solved such that the circumferential Axial securing as an integral part of at least one Is formed sealing element between the bearing rings, wherein the Sealing element both non-positively and over an additionally integrated locking element form fit on the Axialringfläche the outer bearing ring axially fixable.

Of the Invention is therefore based on the finding that it is with a in a sealing element integrated axial locking, which during assembly of the angular contact bearing together with the sealing element in this is used, in a simple way is possible the axial securing with a larger radial height and form axial stiffness than before, and thus a significant higher security against self-dismantling to ensure the angular contact ball bearing.

preferred Embodiments and developments of the inventively designed inclined roller bearing are described in the subclaims.

After that It is according to the invention formed in accordance with claim 2 Schrägwälzlagers provided that the sealing element preferably designed as provided with a reinforcement lip seal is whose non-positive fixation by an additional, takes place in the bearing angled Armierungsschenkel. This additional reinforcing leg is in a particularly cost-effective Training without sheath formed with a rubber coating and has a slightly larger outer diameter as the inner diameter of the axial ring surface of the outer Bearing ring, so that this for non-positive fixation the sealing element with its outer circumferential surface in the Axialringfläche the outer bearing ring can be pressed.

The Axialsicherung against unintentional disassembly is then according to claim 3 in a first embodiment of the invention formed Schrägwälzlagers by the free end of the additional reinforcing leg of the lip seal is formed, by putting this one up in the vicinity of the track in the outer Bearing ring-shaped length is formed. additionally is at the free end of the Armierungsschenkels still a slope or a radius formed as a starting ramp for the bearing balls serves.

The in the sealing element integrated locking element for additional positive locking of the sealing element is in this Embodiment beyond according to claim 4 in a first variant by one in the additional Reinforcing legs inserted and with several evenly circumferentially arranged arranged locking lugs trained circlip formed, the locking lugs by incorporated in the Armierungsschenkel breakthroughs through into a circumferential annular groove in the Axialringfläche engage the outer race. This circlip is initially radial during assembly of the sealing element in the preferably non-cutting produced by punching breakthroughs pushed back in the Armierungsschenkel and snaps then automatically when reaching the end position of the sealing element in the annular groove in the Axialringfläche the outer Bearing ring.

at a second variant proposed by claim 5, the in the sealing element integrated locking element for additional positive fixing of the sealing element, however, by a at the free end face of the Armierungsschenkel radially outward pointing angled formed in one with a rectangular Profile cross-section formed annular groove in the Axialringfläche the outer Bearing ring is latched. This bend can be completely circumferential or only partially circumferential execution particularly cost be produced during deep drawing of the seal reinforcement and will during assembly of the sealing element also initially radially in the Axialringfläche the outer bearing ring pushed back until they are in the final position of the Sealing element automatically in the annular groove in the Axialringfläche engages the outer bearing ring.

A second embodiment of an axial protection against unintentional Disassembly of the inventively designed oblique roller bearing records compared to the first embodiment according to the Claims 6 and 7, however, characterized in that the additional Armierungsschenkel the lip seal on its inner circumferential surface and is encased in a rubber coating on its front, in the one in front of the front of the Armierungsschenkels nearby the raceway arranged in the outer race Molded wire snap ring is vulcanized. This form wire snap ring Here, in addition to the function as axial securing at the same time has the function of Locking element for additional positive fixation the sealing element by this also during assembly of the sealing element in its end position in one with a semicircular Profile cross-section formed annular groove in the Axialringfläche the outer bearing ring can be latched.

To Claim 8 is in an appropriate development the inventively designed oblique roller bearing furthermore provided, although the sealing element also as with a reinforcement provided lip seal with an additional, ins Bearing interior angled Armierungsschenkel for non-positive Formation of the sealing element form, but the additional Armierungsschenkel in an alternative embodiment on its outer circumferential surface to coat with a rubber coating and along with this gum in the Axialringfläche the outer bearing ring to press. Such a design of Armungsschenkels has doing with respect to the described unclad training the advantage that its outer diameter is not so precise on the inner diameter of the Axialringfläche the outer Bearing ring must be matched because of any tolerance deviations in this case with the rubber coating on the outer circumferential surface can be compensated.

outgoing from the use of a rubberized jacketed extra Armierungsschenkels on the lip seal is thus finally as a third embodiment of an axial securing against unintentional dismantling of the invention designed Schrägwälzlagers according to the claims 9 to 11 suggested that in the additional Arierungsschenkel the lip seal a separate, with a z-shaped Profile cross-section formed mold ring is pressed, whose Middle bridge one to near the track in the outer Has bearing ring reaching length and its on this Center bar molded free profile legs a ramp for forms the bearing balls. The free profile leg of this separate Form ring is at the same time by a radial extension as a locking element for additional positive locking Fixation of the sealing element formed by this with his End face in one with a rectangular profile cross-section trained annular groove in the Axialringfläche the outer Bearing ring is latched. In addition, it has to further positive locking of the sealing element as advantageous proved, the additional Armierungsschenkel to him Forming rubber coating with a ring bead, which in a second annular groove in the Axialringfläche the outer Bearing ring is latched.

Brief description of the drawings

The According to the invention trained skew bearings will be described below in several preferred embodiments with reference to the accompanying drawings explained. Showing:

1 an enlarged half-view of a cross section through a first variant of a first embodiment of an inventive skew roller bearing;

2 an enlarged half-view of a cross section through a second variant of a first embodiment of an inventive skew roller bearing;

3 an enlarged half-view of a cross section through a second embodiment of an inventively designed inclined roller bearing;

4 an enlarged half-view of a cross section through a third embodiment of an inventively designed inclined roller bearing.

Detailed description the drawings

The 1 to 4 clearly show each one designed as a single row angular contact ball bearings angular contact bearings 1 which essentially consists of an outer bearing ring 2 with one on the inside 3 arranged career 4 and an inner bearing ring 5 with one on the outside 6 arranged career 7 as well as from a large number in a row in the raceways 4 . 7 the bearing rings 2 . 5 rolling bearing balls 8th consists. These bearing balls 8th each have one to a Lagerradialachse obliquely employed, indicated in the drawings in each case by a dashed line print angle axis 9 on and through a storage cage 10 held in the circumferential direction at regular intervals to each other. The space between the bearing rings 2 . 5 is axially by a sealing element 11 and sealed by another, unspecified sealing element to prevent ingress of contaminants in the angular contact bearings 1 to avoid. The two careers 4 . 7 in the bearing rings 2 . 5 are also clearly visible on the one hand by diagonally opposite shoulders 12 . 13 limited, in which the bearing balls 8th supported on one side axial load, while on the other hand, the career 7 in the inner bearing ring 5 through a second shoulder 14 is limited and the career 4 on the outer bearing ring 2 shoulderless in a flat Axialringfläche 15 passes.

In addition, goes from the 1 to 4 clearly shows that the skew bearings shown 1 each a circumferential axial securing 16 against unintentional disassembly of the same, which according to the invention as an integral part of a sealing element 11 between the bearing rings 2 . 5 is formed, wherein the sealing element 11 both non-positively and via an additionally integrated locking element 17 positive fit on the Axialringfläche 15 of the outer bearing ring 2 axially fixable.

In the in the 1 to 3 shown preferred embodiments of an inventively designed inclined roller bearing 1 is clearly visible the sealing element 11 as with a reinforcement 18 provided lip seal, whose frictional fixation by an additional, angled inside the bearing Armierungsschenkel 19 he follows. This additional reinforcement leg 19 is, as can be seen in the drawings, formed without a sheath with a rubber coating and has a slightly larger outer diameter than the inner diameter of the Axialringfläche 15 of the outer bearing ring 2 on, so this with its outer lateral surface 20 in the Axialringfläche 15 of the outer bearing ring 2 can be pressed.

The axial securing 16 against unintentional dismantling is then at the in the 1 and 2 illustrated first embodiment of an inventive skew roller bearing 1 through the free end face 22 of the additional reinforcement leg 19 The lip seal is formed by placing this one close to the track 4 in the outer bearing ring 2 reaching length and at its free end face 22 with a start-up ramp 21 for the bearing balls 8th serving slope or formed with a radius.

That in the sealing element 11 integrated locking element 17 for the positive fixing of the sealing element 11 is in this embodiment also in a in 1 shown first variant by one in the additional Armierungsschenkel 19 inserted and arranged with several uniformly circumferentially arranged locking lugs 24 trained circlip 23 formed, whose locking lugs 24 through in the Armierungsschenkel 19 integrated breakthroughs 25 through in a circumferential annular groove 26 in the axial ring surface 15 of the outer bearing ring 2 intervention. At the in 2 shown second variant that is in the sealing element 11 integrated locking element 17 for the positive fixing of the sealing element 11 by one on the free end 22 of the reinforcing leg 19 radially outwardly pointing bend 27 formed in a circumferential annular groove 28 in the axial ring surface 15 of the outer bearing ring 2 is latched.

In the 3 illustrated second embodiment of an axial securing against unintentional disassembly of the inventively designed oblique roller bearing 1 is characterized by the fact that the additional Armierungsschenkel 19 the lip seal on its inner circumferential surface 29 and on its front 22 from a gum 30 sheathed in the one in front of the front 22 of the reinforcing leg 19 near the track 4 in the outer bearing ring 2 arranged form wire snap ring 31 vulcanised. This form wire snap ring 31 has in addition to the function as axial 16 at the same time the function of the locking element 17 for the positive fixing of the sealing element 11 By doing this during assembly of the sealing element 11 in a trained with a semi-circular profile cross-section annular groove 32 in the axial ring surface 15 of the outer bearing ring 2 is latched.

At the 4 apparent third embodiment of the inventively designed inclined roller bearing 1 is the sealing element 11 as well as with a reinforcement 18 provided lip seal with an additional, angled into the bearing armoring legs 19 for non-positive fixation of the sealing element 11 trained, however, is the additional Armierungsschenkel 19 in an alternative embodiment on its outer circumferential surface 20 with a rubber coating 33 encased and along with this gum 33 in the Axialringfläche 15 of the outer bearing ring 2 pressed.

The axial securing 16 against unintentional disassembly of the inventively designed oblique roller bearing 1 is in this embodiment by a separate, in the additional Armierungsschenkel 19 of the sealing element 11 pressed and formed with a z-shaped profile cross-section molding ring 34 formed, whose center bar one up to near the career 4 in the outer bearing ring 2 reaching length and its integrally formed on this central web free profile legs 36 a ramp 35 for the bearing balls 8th forms. The free profile leg 36 this separate form ring 34 is at the same time as a locking element 17 for the positive fixing of the sealing element 11 trained by this with its front 37 in a circumferential annular groove 38 in the axial ring surface 15 of the outer bearing ring 11 is latched. This is indicated by the additional reinforcing leg 19 for further positive fixation of the sealing element 11 on the rubber coating that surrounds him 33 an additional annular bead 39 on, in a second annular groove 40 in the axial ring surface 15 of the outer bearing ring 2 is latched.

1

Angular bearings

2

outer bearing ring

3

Inside of 2

4

Career in 2

5

internal bearing ring

6

Outside of 5

7

Career in 5

8th

bearing balls

9

Pressure angle axis of 8th

10

Bearing cage for 8th

11

sealing element

12

Shoulder on 4

13

Shoulder on 7

14

second shoulder

15

Axialringfläche

16

axial safety

17

locking element

18

Reinforcement of 11

19

Armierungsschenkel on 18

20

Outer jacket surface of 19

21

Starting ramp on 22

22

Front side of 19

23

circlip

24

Latching lugs on 23

25

Breakthroughs in 19

26

Ring groove in 15

27

Angulation 22

28

Ring groove in 15

29

Inner lateral surface of 19

30

Gumming on 29

31

Form wire snap ring

32

Ring groove in 15

33

Gumming on 20

34

mold ring

35

Starting ramp on 36

36

Profile legs on 34

37

Front side of 36

38

Ring groove in 15

39

Ring bulge on 33

40

second annular groove in 15

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 3513722 A1 [0002]
• DE 102004014775 A1 [0003]
• - DE 10239742 A1 [0004]

Claims (11)

Angular contact bearings ( 1 ), in particular a single-row angular contact ball bearing, essentially consisting of an outer bearing ring ( 2 ) with at least one on the inside ( 3 ) arranged career ( 4 ) and an inner bearing ring ( 5 ) with at least one on the outside thereof ( 6 ) arranged career ( 7 ) and of a plurality in at least one row in the raceways ( 4 . 7 ) of the bearing rings ( 2 . 5 ) rolling bearing balls ( 8th ), each one inclined to a Lagerradialachse inclined pressure angle axis ( 9 ) and by at least one bearing cage ( 10 ) are kept at equal intervals in the circumferential direction, wherein the space between the bearing rings ( 2 . 5 ) at least axially on one side by a sealing element ( 11 ) and the at least two tracks ( 4 . 7 ) in the bearing rings ( 2 . 5 ) on the one hand by diagonally opposite shoulders ( 12 . 13 ), at which the bearing balls ( 8th ) support on one side axial load, while on the other hand, the career ( 7 ) in the inner bearing ring ( 5 ) through a second shoulder ( 14 ) and the career path ( 4 ) in the outer bearing ring ( 2 ) without a shoulder into a flat axial annular surface ( 15 ), at which a circumferential axial securing ( 16 ) against unintentional disassembly of the angular contact bearing ( 1 ), characterized in that the circumferential axial securing ( 16 ) as an integral part of the at least one sealing element ( 11 ) between the bearing rings ( 2 . 5 ), wherein the sealing element ( 11 ) Both non-positively and via an additionally integrated locking element ( 17 ) positively on the Axialringfläche ( 15 ) of the outer bearing ring ( 2 ) is axially fixable. Angular contact roller bearing according to claim 1, characterized in that the sealing element ( 11 ) preferably as having a reinforcement ( 18 ) provided lip seal is formed whose non-positive fixation by an additional, angled inside the bearing Armierungsschenkel ( 19 ), which with its outer circumferential surface ( 20 ) in the Axialringfläche ( 15 ) of the outer bearing ring ( 2 ) is pressed. Angular rolling bearing according to claim 2, characterized in that the additional reinforcing leg ( 19 ) of the lip seal one into the vicinity of the track ( 4 ) in the outer bearing ring ( 2 ) has sufficient length and with its free, preferably with a starting ramp ( 21 ) for the bearing balls ( 8th ) formed end face ( 22 ) the axial lock ( 16 ) against unintentional disassembly of the angular contact bearing ( 1 ). Angular rolling bearing according to claim 3, characterized in that as a latching element ( 17 ) for additional positive fixation of the sealing element ( 11 ) in its Armierungsschenkel ( 19 ) with a plurality of uniformly circumferentially distributed locking lugs ( 24 ) formed locking ring ( 23 ) is inserted, whose locking lugs ( 24 ) through in the Armierungsschenkel ( 19 ) incorporated breakthroughs ( 25 ) through into a circumferential annular groove ( 26 ) in the axial ring surface ( 15 ) of the outer bearing ring ( 2 ) intervene. Angular rolling bearing according to claim 3, characterized in that as a latching element ( 17 ) for additional positive fixation of the sealing element ( 11 ) of the reinforcing legs ( 19 ) on its free end face ( 22 ) with a radially outwardly pointing bend ( 27 ) is formed, which in a formed with a rectangular profile cross-section annular groove ( 28 ) in the axial ring surface ( 15 ) of the outer bearing ring ( 2 ) is latched. Angular rolling bearing according to claim 2, characterized in that the additional reinforcing leg ( 19 ) of the lip seal on its inner circumferential surface ( 29 ) and on its front side ( 22 ) of a gum ( 30 ), in which one in front of the front side ( 22 ) of the reinforcing leg ( 19 ) near the track ( 4 ) in the outer bearing ring ( 2 ) arranged molding wire snap ring ( 31 ) as axial securing ( 16 ) against unintentional disassembly of the angular contact bearing ( 1 ) is vulcanized. Angular rolling bearing according to claim 5, characterized in that the front of the front side ( 22 ) of the reinforcing leg ( 19 ) arranged molding wire snap ring ( 31 ) at the same time as a latching element ( 17 ) for additional positive fixation of the sealing element ( 11 ) and formed in a formed with a semi-circular profile cross-section annular groove ( 32 ) in the axial ring surface ( 15 ) of the outer bearing ring ( 2 ) is latched. Angular contact roller bearing according to claim 1, characterized in that the sealing element ( 11 ) preferably as having a reinforcement ( 18 ) provided lip seal is formed whose non-positive fixation by an additional, angled in the bearing interior and on its outer circumferential surface ( 20 ) with a rubber coating ( 33 ) sheathed Armierungsschenkel ( 19 ), which is in the Axialringfläche ( 15 ) of the outer bearing ring ( 2 ) is pressed. Angular rolling bearing according to claim 8, characterized in that in the additional reinforcement legs ( 19 ) of the lip seal a separate, formed with a z-shaped profile cross-section molding ring ( 34 ) which is pressed into the vicinity of the track ( 4 ) in the outer bearing ring ( 2 ) and having a free, with a starting ramp ( 35 ) for the bearing balls ( 8th ) formed profile legs ( 36 ) the axial lock ( 16 ) against unintentional disassembly of the angular contact bearing ( 1 ). Angular rolling bearing according to claim 9, characterized in that the free profile leg ( 36 ) of the separate molding ring ( 34 ) by a radial extension at the same time as a latching element ( 17 ) for additional positive fixation of the sealing element ( 11 ) and with its front side ( 37 ) in a formed with a rectangular profile cross-section annular groove ( 38 ) in the axial ring surface ( 15 ) of the outer bearing ring ( 2 ) is latched. Angular rolling bearing according to claim 10, characterized in that the additional reinforcing leg ( 19 ) on the gumming covering it ( 33 ) for further positive fixation of the sealing element ( 11 ) an annular bead ( 39 ), which in a second annular groove ( 40 ) in the axial ring surface ( 15 ) of the outer bearing ring ( 2 ) is latched.