DE102009012076A1 - Sealing arrangement for a rolling bearing and spherical roller bearing with the seal assembly - Google Patents

Abstract

The invention has for its object to provide a seal assembly or a spherical roller bearing with this seal assembly, which allow easy installation of the seal assembly and / or the spherical roller bearing. For this purpose, a sealing arrangement for a rolling bearing 1 with at least one raceway ring 3 is proposed, wherein the raceway ring 3 has a raceway 6, which is designed for rolling rolling elements 4 in a Wälzkörperraum (8), with a sealing washer 9, which the Wälzkörperraum 8 in an axial direction of the seal assembly seals, with a puncture region 17 which is arranged in the raceway ring 3 and in which the sealing disc 9 is fixed, wherein the sealing disc 9 is supported on a support surface 18 of the puncture region 17 and wherein the support surface 18 and the raceway. 6 overlap at least in sections in the radial direction of the axis of rotation of the rolling bearing 1 and wherein the sealing ring 9 is arranged in the puncture region 17 self-holding and / or self-clamping.

Description

Field of the invention

The The invention relates to a sealing arrangement for a rolling bearing with at least one raceway ring, the raceway raceway having a track which is responsible for a rolling of rolling elements is formed in a Wälzkörperraum, with a Gasket, which the Wälzkörperraum in an axial direction of the seal assembly seals, with a Puncture area, which is arranged in the raceway ring and in the gasket is fixed, with the gasket supported on a support surface of the puncture area and wherein the bearing surface and the raceway in the radial direction overlap the axis of rotation of the bearing at least in sections. The invention also relates to a spherical roller bearing with this seal arrangement.

roller bearing usually have an inner ring, an outer ring and arranged therebetween rolling elements, which roll on the inner ring and outer ring. Of the Area in which the rolling elements roll off, is usually called Wälzkörperraum is often necessary, this Wälzkörperraum seal against the environment. By the seal Two possible functions can be implemented: On the one hand, the seal ensures that lubricants, such as For example, fats or oils, which in the Wälzkörperraum are introduced for lubricating the rolling elements, can not escape from the Wälzkörperraum. On the other hand can be ensured by a seal that no impurities, such as foreign liquids, Particles, etc., enter the Wälzkörperraum and impair the functioning of the rolling bearing.

For example, the document shows US 4,916,750 a radial bearing assembly, which is sealed in the axial direction by means of Simmerringen, which are inserted or pressed between the outer ring and the inner ring.

The publication DE 692 051 57 T2 , which probably forms the closest prior art, also relates to a radial rolling bearing, which is sealed in the axial direction or the end face by means of a sealing ring. To reduce the size of the radial roller bearing is proposed to introduce a groove in the outer ring, which is aligned in a longitudinal section through the axis of rotation of the radial rolling slightly angled to a radial plane of the rotation axis. In a first step, the sealing disc is loosely inserted into this groove and fixed in a second step by a locking ring, which is also inserted into the groove.

Of the Invention is based on the object, a seal assembly or to propose a spherical roller bearing with this seal arrangement, which a simple assembly of the seal assembly and / or the Enable spherical roller bearings.

These Task is performed by a seal assembly with the characteristics of Claim 1 and by a spherical roller bearing with the features of the claim 13 solved. Preferred or advantageous embodiments The invention will become apparent from the dependent claims, the following description and the accompanying figures.

The inventive seal assembly is for a rolling bearing, in particular a radial rolling bearing, suitable and / or trained. In the most general embodiment can the rolling bearing as a single or multi-row roller bearing be formed, which z. B. balls and / or rollers as rolling elements Has.

The Sealing arrangement has at least one raceway ring, which preferably integrally carries a career, the for a rolling of the rolling elements is formed in a Wälzkörperraum. The career encloses the area, which of the rolling elements is actually touched. For a more extensive Definition, the track can also enclose a section which represents an outlet surface of the actual career. For example the track is in longitudinal section through an axis of rotation of the rolling bearing at the edge by a turning point in the course limited. Under the axis of rotation is preferably also a pivot axis to understand.

The Sealing arrangement comprises a sealing disk which has a rolling body space, in which the rolling elements on the at least one Roll raceway ring in an axial direction of the rolling bearing caulk. As axial direction, the direction becomes parallel to the Designated axis of rotation of the bearing. The sealing washer can be used as a contacting seal, which at a mating surface opposite to the at least one raceway ring, in particular bears against another raceway ring formed be. In alternative embodiments, the sealing disc can also embodied as a non-contact seal be.

The raceway ring has a puncture area, which can be introduced in the most general form of the invention with any manufacturing method, wherein the puncture area is arranged in, in particular within the raceway ring and in which the sealing disc is fixed. The puncture area preferably comprises at least one groove-like section. The puncture area is preferably in the direction of rotation about the rotation axle formed with a constant profile.

in the built-in state, the gasket is supported a contact surface of the puncture area, wherein the Support surface is arranged so that the support surface and the raceway in a radial direction of the rolling bearing, ie perpendicular to the axis of rotation of the bearing, at least overlap in sections. The bearing surface is preferably formed as a circumferential annular surface.

In Differentiation from the known prior art is proposed that the sealing ring in the puncture area self-holding and / or self-clamping is arranged.

Especially the sealing ring is held by the puncture area and / or clamped, with special attention to separate fasteners, such as For example, screws, clamping plates, etc., can be dispensed with. The sealing ring or the puncture area are thus designed to that after insertion of the sealing ring in the puncture area this functional and at the same time secured arranged is.

By This modification is achieved by making the seal assembly or the rolling bearing can be cost-effective, as can be dispensed with the additional fasteners. In addition, the assembly is simplified because the sealing ring after the Insertion into the puncture area without further assembly steps already is ready for operation.

at a preferred embodiment of the invention is the Support surface in a longitudinal section through the Rotary axis of the rolling bearing parallel or coaxial and / or aligned concentrically to this axis of rotation. Through this education in the form of a straight cylindrical surface is through the Support surface next to a form-fitting contact surface at the same time a centering surface formed for the sealing ring.

at Another embodiment of the invention is the support surface tapered, wherein in a longitudinal section through the axis of rotation of the bearing the conical surface an angle to the axis of rotation less than 20 °, preferably less than 10 ° and in particular less than 5 °. In particular, the area with the smaller diameter is on the output side arranged to the puncture area, so that an insertion the sealing washer is facilitated.

at an advantageous concretization of the invention, the sealing disc a Armierungsscheibe, which preferably formed of metal is. The Armierungsscheibe has a parallel to the axis of rotation the rolling bearing aligned edge region on the Support is formed on the support surface. This edge area is pushed onto the support surface, wherein in the case of a parallel to the axis of rotation aligned bearing surface a game of less than 4/10 mm, preferably less than 3/10 mm and in particular less than 1/10 mm is provided. Through this Embodiment will be a very accurate centering of the gasket supported. In modified embodiments can be between the edge area and the support surface too a plastic layer may be provided which is on the Armierungsscheibe is applied by vulcanizing, for example. For the Case of a conical bearing surface are the Diameter of edge area and cone chosen so that the Armierungsscheibe or the sealing washer first self-centering be placed on the support surface can and if you postpone either a small game like previously or even forms a clamp on the support area. at again other embodiments, it is also possible that the extension of the support surface in the said Longitudinal section is chosen curved.

at a particularly advantageous embodiment of the invention the gasket has a plastic portion which with the sealing washer or Armierungsscheibe example over Vulcanization is connected, and which for the gasket a positive captive in the puncture area forms. In particular, the installation position is due to the plastic area secured the gasket.

at A concretization of the invention is the plastic area ring- and / or bead-like in the radial direction to the support surface educated.

Especially it is preferred if the puncture area in longitudinal section formed by the axis of rotation of the seal assembly L-shaped is, wherein the one leg, the support surface and the other Leg forms a receiving space for the plastic area. In this embodiment, during assembly of the seal assembly the edge area inserted over the support surface and the plastic area are snapped into the receiving space. Particularly preferred is the leg, which in the radial direction is directed away from the Wälzkörperraum.

at a concretization of the invention is the puncture area as realizes an undercut area, wherein the course of the puncture area starting from the entrance opening z. B. formed kinked or angled is, so that in axial plan view of the puncture area of Recording room is partially obscured.

With the goal of achieving high manufacturing accuracy, it is preferable when the puncture area is formed by hard turning. Hard turning refers to a machining process, which at the already hardened raceway ring is performed. Especially The puncture area is preferred by a puncture in the axial Direction generated to the axis of rotation of the bearing.

at a possible development of the invention is the sealing washer flush in the axial direction or even reset to the inside arranged to the front side of the raceway ring. This embodiment is achieved in that the raceway ring at the front between the puncture area and the Wälzkörperraum removed is or by at this point a corresponding indentation exists. This training has the potential benefits that for a particularly easy to perform the installation of the sealing ring can be because it is pressed until the press punch flush with the end face of the raceway ring. To the others can be made sure that no sensitive Protect areas of the sealing ring over the front, which could be injured during operation of the rolling bearing.

at a particularly advantageous realization of the raceway ring formed as an outer ring, wherein the support area oriented radially outward and / or the receiving space radially outward with respect to the edge region of the reinforcing disk is aligned. In this advantageous arrangement remains between the puncture area and the Wälzkörperraum a large proportion of the base material of the outer ring, In particular, no geometry is formed which leads to a strong notch effect and thus premature wear of the outer ring leads.

One Another object of the invention relates to a spherical roller bearing with the features of claim 13, which according to the invention a Sealing arrangement according to one of the preceding claims having. The pendulum roller bearing preferably has a hollow spherical Raceway in the outer ring and carries barrel rollers as a rolling element. After the spherical roller bearing Angular error between inner ring and outer ring by mutual Allow tipping, the inventive Sealing arrangement can be used particularly advantageous because this due to the structural design of a short-term touch the rolling elements on the sealing ring due to the stable Can tolerate determination.

Further Features, advantages and effects of the invention will become apparent the following description of preferred embodiments the invention and the accompanying figures. Showing:

1 a schematic longitudinal section through a rolling bearing as an embodiment of the invention;

2 a detail enlargement from the 1 ,

The 1 shows a spherical roller bearing 1 in a schematic longitudinal sectional view through its axis of rotation, not shown, as an embodiment of the invention.

The spherical roller bearing 1 has an inner ring 2 , an outer ring 3 and a plurality between inner ring 2 and outer ring 3 rollingly arranged barrel rolls 4 on which is on an inner track 5 or an outer raceway 6 roll off. The inner career 5 or the outer raceway 6 are integral with the inner ring 2 or the outer ring 3 connected or formed in this. For guiding the barrel rollers 4 shows the spherical roller bearing 1 a cage 7 ,

Between the inner raceway 5 and the outer raceway 6 is a rolling element room 8th formed, which on an axial outside of the spherical roller bearing 1 through a sealing washer 9 is sealed.

The sealing washer 9 is - as will be explained in detail below - in the outer ring 3 fixed stationary and has at its radially inner edge region a contacting sealing lip 10 which is on a seal abutment section 11 of the inner ring 2 sealingly rests. To the bearing force even with a pivoting of the inner ring 2 to the outer ring 3 constant or substantially constant, is the sealing portion 11 formed inclined to the axis of rotation, not shown. The sealing section 11 may also have a curvature in the longitudinal section shown. The sealing lip 9 is formed, the Wälzkörperraum 8th To protect against incoming pollution or to retain existing lubricant in the Wälzkörperraum back.

The sealing washer 9 is roughly divided into three areas in its radial extent, wherein in a first region I, the sealing lip 10 is arranged, in a second area II a disc area 13 and in a third area III, a fixing portion 14 followed. The sealing washer 9 includes a reinforcement disk 12 , which is formed for example of metal and which extends over all said areas I-III. In area I is the Armierungsscheibe 12 slightly angled about 45 ° to axially inside and forms a Carrier for the sealing lip 10 , In area II is the Armierungsscheibe 12 plan, wavy, stepped or formed with beads and provided on the outside at least in sections on the inside with a plastic. In the area III is the Armierungsscheibe 12 angled vertically inward in the longitudinal section shown and forms a ring section 15 , Radial outside to the ring section 15 closes in the attachment section 14 a circumferential form-fitting body 16 which, for a positive fixing of the sealing washer 9 provides. sealing lip 10 , Plastic coating in area II and positive fit body 16 can act as a common plastic coating on the armor plate 12 applied, z. B. be vulcanized.

In the outer ring 3 is spaced from the Wälzkörperraum 8th a puncture area 17 introduced, which for receiving the attachment portion 14 is trained. The puncture area 17 is in the outer ring 3 introduced by hard turning, wherein the turning only after the final shaping and / or hardening of the outer ring 3 , is done. This hard turning can be done with very high accuracy, so that also the puncture area 17 is designed with low tolerances.

The puncture area 17 shows on the radial inside a bearing surface 18 , which in the embodiment shown has a straight cylindrical shell shape or runs parallel to the axis of rotation, not shown. On the support surface 18 is the sealing washer 9 or the Armierungsscheibe 12 deferred, leaving the support surface 18 the sealing washer 9 centered and optionally clamped. On the one hand it is possible that the free inner diameter of the ring section 15 slightly larger, for example, 0.1 mm larger than the outer diameter of the support surface 18 is chosen so that a centering accuracy of 0.1 mm for the sealing ring 9 results. In other embodiments, the support surface 18 also be conical, so that the gasket 9 , the armor plate 12 or the ring section 15 simply put on and then in the direction of the larger diameter of the support surface 18 can be inserted, resulting in a clamping action.

The axial positioning of the sealing washer 9 or Armierungsscheibe 12 is by a contact surface 19 , which is designed as an axial end face defined. During assembly, the sealing washer 9 pushed so far, until the Armierungsscheibe 12 at the contact surface 19 is applied. The contact surface 19 is with respect to the end face S of the spherical roller bearing 1 or the outer ring 3 axially offset inwardly so that the gasket 9 is arranged flush with the radial plane formed by the end face S or even offset as in the example shown inwardly.

The puncture area 17 is formed in the coarse form L-shaped, wherein the leg lying the support surface 18 and the standing thigh a receiving space 20 for the positive-locking body 16 forms. The form-fitting body 16 has a profile similar to a right triangle, with the catheters forming the ring section 15 and a radially oriented wall of the receiving space 20 facing and the hypotenuse to the exit opening of the puncture area 17 shows. The recording room 20 is formed as an undercut region viewed from the axial insertion side, so that during assembly of the sealing washer 9 the form-fitting body 16 is first deformed and then in the undercut receiving area 20 again assumes its original shape, so that the form-fitting body 16 in the direction of axially outward by an undercut nose 21 in the area of the hypotenuse of the profile in the outer ring 3 is held positively.

It is particularly beneficial to the recording room 20 on the rolling body space 8th opposite side of the ring section 15 to arrange, since in this case between the puncture area 17 and the Wälzkörperraum 8th as much base material of the outer ring 3 remains.

As is clear from the 1 gives, represents the seal arrangement of the spherical roller bearing 1 an extremely compact design because the outer raceway 6 and the bearing surface 18 in the radial direction to the axis of rotation 2 are formed partially overlapping. Thus, it is possible in the seal assembly, sealed spherical roller bearings 1 manufacture, which have a virtually unchanged axial width compared to unsealed spherical roller bearings.

1

Spherical roller bearings

2

inner ring

3

outer ring

4

barrel rollers

5

inner career

6

outer career

7

Cage

8th

anti-friction

9

sealing washer

10

sealing lip

11

Seal bearing section

12

Armierungsscheibe

13

disk area

14

attachment section

15

ring section

16

Form-fitting body

17

puncture area

18

bearing surface

19

contact surface

20

reception area

21

Hinterschneidungsnase

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

• US 4916750 [0003]
• - DE 69205157 T2 [0004]

Claims (13)

Sealing arrangement for a rolling bearing ( 1 ) with at least one raceway ring ( 3 ), whereby the raceway ring ( 3 ) a career ( 6 ), which is suitable for rolling rolling elements ( 4 ) in a Wälzkörperraum ( 8th ) is formed, with a sealing washer ( 9 ), which the Wälzkörperraum ( 8th ) seals in an axial direction of the seal arrangement, with a puncture area ( 17 ), which in the raceway ring ( 3 ) is arranged and in which the sealing disc ( 9 ), wherein the sealing disc ( 9 ) on a support surface ( 18 ) of the puncture area ( 17 ) and wherein the support surface ( 18 ) and the career path ( 6 ) in the radial direction of the axis of rotation of the rolling bearing ( 1 ) at least partially overlap, characterized in that the sealing ring ( 9 ) in the puncture area ( 17 ) is arranged self-holding and / or self-clamping. Sealing arrangement according to claim 1, characterized in that the bearing surface ( 18 ) in a longitudinal section through the axis of rotation of the rolling bearing ( 1 ) is aligned parallel to the axis of rotation. Sealing arrangement according to claim 1, characterized in that the bearing surface ( 18 ) is aligned in a longitudinal section through the axis of rotation of the rolling bearing conically with an angle to the axis of rotation less than 20 °, preferably less than 10 ° and in particular less than 5 °. Sealing arrangement according to one of the preceding claims, characterized in that the sealing disc (9) a Armierungsscheibe ( 12 ), preferably made of metal, which has a same, in particular parallel to the axis of rotation aligned edge region ( 15 ), which for supporting on the support surface ( 18 ) is trained. Sealing arrangement according to one of the preceding claims, characterized in that the sealing disc ( 9 ) a plastic area ( 16 ), which for the sealing disc ( 9 ) a positive captive in the puncture area ( 17 ). Sealing arrangement according to claim 5, characterized in that the plastic region ( 16 ) annularly in the radial direction to the support surface ( 18 ). Sealing arrangement according to one of the preceding claims, characterized in that the puncture area ( 17 ) is formed in longitudinal section through the axis of rotation of the seal arrangement L-shaped or similar, wherein the one leg, the support surface ( 18 ) and the other leg a receiving space ( 20 ) for the plastic sector ( 16 ). Sealing arrangement according to one of the preceding claims, characterized in that the puncture area ( 17 ), in particular the receiving space ( 20 ), is formed as an undercut area. Sealing arrangement according to one of the preceding claims, characterized in that the puncture area ( 17 ) is formed by hard turning. Sealing arrangement according to one of the preceding claims, characterized in that the puncture area ( 17 ) is formed by a puncture in the axial direction. Sealing arrangement according to one of the preceding claims, characterized in that the sealing disc ( 9 ) in the axial direction flush or axially inwardly set back with the end face (S) of the raceway ring ( 3 ) completes. Sealing arrangement according to one of the preceding claims, characterized in that the raceway ring ( 3 ) is formed as an outer ring, wherein the support area ( 18 ) oriented radially outward and / or the receiving space ( 20 ) is aligned radially outward. Spherical roller bearings ( 1 ), characterized by a sealing arrangement according to one of the preceding claims.