DE102017220565A1 - Rolling bearings with seal and angle measuring device - Google Patents

Abstract

The invention is based on a roller bearing (10) with at least two bearing rings (12, 14, 16), with a plurality of in a gap (18) between the bearing rings (12, 14, 16) arranged rolling elements (20), with at least a sealing ring (22) which is provided to at least substantially seal the intermediate space (18) with respect to an environment, and with an angle measuring device (24) which has at least one material measure (26).
It is proposed that the material measure (26) of the angle-measuring device (24) is formed at least partially in one piece with the sealing ring (22).

Description

State of the art

The invention relates to a rolling bearing according to the preamble of claim 1.

The DE 10 2014 203 517 A1 discloses a rolling bearing with an angle measuring device known in which a measuring graduation of the angle measuring device by means of a separate attachment, which is fastened by means of a screw to a bearing inner ring, is arranged on the bearing inner ring.

From the DE 11 2009 000 106 T5 is a radial roller bearing with seals known.

The object of the invention is to provide a generic rolling bearing with an advantageous integration density, in particular with regard to an integration of an angle measuring device, with simultaneous advantageous sealing of the rolling bearing. The object is solved by the features of the characterizing part of claim 1. Advantageous embodiments of the invention are indicated in the dependent claims.

Disclosure of the invention

The invention is based on a rolling bearing with at least two bearing rings, with a plurality of rolling elements arranged in a space between the bearing rings, with at least one sealing ring which is provided to at least substantially seal the gap with respect to an environment, and with an angle measuring device, which has at least one material measure.

It is proposed that the material measure of the angle measuring device is at least partially formed integrally with the sealing ring. By "one piece" should be understood in particular at least materially connected connected, for example, by a welding process, a gluing process, a Anspritzprozess and / or another, the skilled person appear useful process, and / or advantageously formed in one piece, such as by a Manufacture from a casting and / or by a production in a one- or multi-component injection molding process and advantageously from a single blank. In this way, an advantageous integration of the angle measuring device in the rolling bearing with simultaneous sealing of the gap between the bearing rings done.

The rolling bearing can be designed, in particular, as a ball bearing, as a roller bearing or as another roller bearing suitable for a person skilled in the art, for example as a needle bearing or the like. The rolling elements of the rolling bearing can thus be designed in particular as balls or rollers depending on the type of rolling bearing. The sealing ring is in particular intended to prevent penetration of dirt or moisture into the intermediate space of the rolling bearing and / or leakage of lubricants from the intermediate space of the rolling bearing, at least largely. In particular, the sealing ring is provided to at least substantially close the intermediate space in the direction of an environment. In this context, the term "at least substantially" should be understood in particular to mean that the sealing ring seals the intermediate space at least 75%, advantageously at least 85%, and particularly advantageously at least 95% with respect to an environment.

The angle measuring device is in particular provided to detect a rotational angle of the bearing rings relative to one another during operation of the rolling bearing relative to one another or absolutely. By "provided" is intended to be understood in particular specially programmed, designed and / or equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state. In particular, the angle measuring device can be designed as inductive, optical or capacitive measuring device for detecting the angle of rotation of the bearing rings to each other.

It is also proposed that the material measure of the angle measuring device is formed by the at least one sealing ring or at least unilaterally covered by the at least one sealing ring. The sealing ring may in particular be directly part of the angle measuring device. Preferably, the sealing ring form the measuring standard of the angle measuring device. Alternatively, the sealing ring may be provided to cover the measuring standard of the angle measuring device on at least one side or both sides on an outer side in order to prevent deposits from accumulating in or on the material measure. Alternatively, the sealing ring completely enclose the material measure.

Preferably, the material measure has along its circumference a plurality of recesses and / or elevations, which are provided to form a correlating with a rotation angle of the bearing pitch and / or coding. In addition, a reference mark may be provided in the material measure or on one of the bearing rings for producing an absolute reference. In an absolute angular position determination can in particular by surveys and / or recesses in the material measure a code structure are provided by the material measure, which provides absolute position information for each angular position.

Advantageously, the at least one sealing ring as a sheet metal ring, in particular sheet steel ring, is executed. Preferably, the sealing ring is at least substantially formed of a stainless steel. In this way, an advantageous long service life of the sealing ring can be achieved. Alternatively or additionally, the sealing ring may be at least partially formed by a plastic and / or an elastomer. A sealing ring made of a plastic and / or an elastomer can be applied in particular to the material measure, for example by spraying and / or sticking. Alternatively, the material measure can be encapsulated with a plastic, whereby the material measure and the sealing ring form an inseparable unit.

Preferably, the angle measuring device has at least one measuring head, which is arranged on a stationary bearing ring. The angle measuring device can be designed, for example, as a purely inductive measuring system, wherein the measuring head comprises at least transducer or sensor, which faces the measuring graduation and detects an angular position of the material measure incrementally or absolutely. For example, in an incremental measuring method, the angular position of the material measure and thus of the corresponding bearing ring is determined by counting individual increments of a periodic division of the recesses provided in the material measure and / or elevations. Alternatively, the angle measuring device may be formed as an optical measuring system, wherein the measuring head has at least one optical sensor, which is intended to detect optical marks of the material measure. The at least one sealing ring is arranged on a rotating bearing ring. Likewise, the dimensional standard of the angle measuring device formed integrally with the sealing ring is also arranged on the rotating bearing ring.

In particular, the rolling bearing may be formed as a radial roller bearing. In an embodiment of the rolling bearing as a radial roller bearing bearing rings are arranged coaxially with each other and the sealing ring extends radially between the bearing rings. Alternatively, the rolling bearing may be formed as an axial roller bearing. In an embodiment of the rolling bearing as an axial roller bearing, the bearing rings are arranged coaxially with each other and the sealing ring extends axially between the bearing rings.

In one embodiment of the invention, it is proposed that the rolling bearing has two bearing inner rings mounted on one another and a bearing outer ring. In particular, the roller bearing can be provided for a rotating about a rotation axis element, for example, for a shaft, a spindle, a turntable or a rotary indexing table. The bearing inner rings are mounted on each other in particular in the direction of the axis of rotation. The bearing outer ring is enclosed in the region of its radially inner circumference in the direction of the axis of rotation on both sides together by the bearing inner rings. The bearing outer ring therefore immersed radially from the outside in a space enclosed by the bearing inner rings on both sides in the direction of the axis of rotation. The thus enclosed by the bearing inner rings and the bearing outer ring space can also be referred to as a bearing receiving space.

The two bearing inner rings are mounted by means of at least two rows of rolling bearings, in particular by means of three rows of bearings rotatably mounted about the axis of rotation on the bearing outer ring. For example, a first rolling bearing row is provided for forming a radial bearing, wherein the rolling elements of the rolling bearing row about an axis of rotation, which runs parallel to the axis of rotation of the rotating element, and are positioned in the radial direction between the bearing outer ring and at least one of the two bearing inner rings. In addition, two in the direction of the rotation axis axially opposing, axial forces receiving rolling bearing rows may be provided, which are positioned in the direction of the axis of rotation between the two bearing inner rings and the bearing outer ring and having rolling elements whose axes of rotation are perpendicular to the axis of rotation of the rotating element. Roller bearings, in particular cylindrical roller bearings are preferably provided, so rolling bearing rows with roller-shaped or cylindrical roller-shaped rolling elements.

According to the invention, a band-shaped sealing ring is applied to at least one of the two bearing inner rings, which surrounds the corresponding bearing inner ring along its outer circumference and extending to the radially outer seal at least one of the rolling bearing rows along or past this in the direction of the bearing outer ring. When extending "only" along the row of rolling bearings, the sealing ring does not extend beyond the bearing row on the side facing away from the bearing inner ring, from which it extends, beyond the rolling bearing row or even ends at a distance to this side. The extension of the sealing ring can be provided according to an embodiment exclusively in the direction of the axis of rotation or parallel to the axis of rotation, so that the sealing ring is hollow cylindrical. However, other forms come into consideration, for example, a hollow truncated cone-shaped form in which the sealing ring extends in an axial section through the axis of rotation obliquely to the axis of rotation.

In an axial section through the axis of rotation of the bearing inner rings, the sealing ring preferably has a linear extension on both sides of the axis of rotation. In principle, however, deviating from the linear shape forms into consideration, for example, a stepped shape or a curved shape. As a rule, the at least one sealing ring will surround the axis of rotation concentrically, namely when the bearing inner rings have a circular outer circumference. The at least one sealing ring may for example be pressed onto the outer circumference of the bearing inner ring, that is to say held in a press fit on the bearing inner ring. The pressing can be done without heat treatment. Alternatively, the sealing ring can be heated prior to placement on the bearing inner ring, so that increases its diameter. At the same time or alternatively, the corresponding bearing inner ring can be cooled. The joining of the sealing ring on the bearing inner ring can then take place in the state with different temperatures of the sealing ring and the bearing inner ring in order to achieve a press fit after temperature compensation. Additionally or alternatively to the pressing of the sealing ring on the bearing inner ring of the sealing ring may be glued to the bearing inner ring. In principle, alternatively or additionally, other assembly methods come into consideration, for example a positive locking, a soldering and / or a welding.

The sealing ring is part of the angle measuring device and can, for example, form the material measure of the angle measuring device or cover the measuring graduation of the angle measuring device on the radial outer side, to avoid accumulating deposits in or on the material measure. According to one embodiment, only one of the two bearing inner rings is provided with a sealing ring which forms or encloses a component, in particular the encoder ring of the angle measuring system. The other bearing inner ring can then be free of a sealing ring applied to the outer circumference or have a band-shaped sealing ring, which is not part of an angle measuring system and in particular exercises only the sealing function.

The Wälzlagersoll invention should not be limited to the application and embodiment described above. In particular, the rolling bearing according to the invention may have a number deviating from a number of individual elements, components and units specified herein for fulfilling a mode of operation described herein.

list of figures

Further advantages emerge from the following description of the drawing. In the drawing, three embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

• 1 eine Schnittdarstellung eines radialen Kugellagers mit einem Dichtring und einer Winkelmesseinrichtung,
• 2 eine Schnittdarstellung eines axialen Kugellagers mit einem Dichtring und einer Winkelmesseinrichtung,
• 3 eine Wälzlager für einen Werkzeugmaschinentisch in einem Axialschnitt,
• 4 einen in Umfangsrichtung gegenüber dem Axialschnitt aus der 3 versetzten Axialschnitt, aus welchem optional vorgesehene Merkmale entnommen werden können,
• 5 eine Detail einer möglichen Gestaltung mit einem Dichtring an einem Lagerinnenring und eine Maßverkörperung an dem anderen Lagerinnenring und
• 6 Beispiele für einen Dichtring, der zugleich Bestandteil eines Winkelmesssystems ist.

Show it:

• 1 a sectional view of a radial ball bearing with a sealing ring and an angle measuring device,
• 2 a sectional view of an axial ball bearing with a sealing ring and an angle measuring device,
• 3 a rolling bearing for a machine tool table in an axial section,
• 4 one in the circumferential direction relative to the axial section of the 3 staggered axial section, from which optional features can be taken,
• 5 a detail of a possible design with a sealing ring on a bearing inner ring and a material measure on the other bearing inner ring and
• 6 Examples of a sealing ring, which is also part of an angle measuring system.

Description of the embodiments

1 shows a sectional view of a radial rolling bearing 10 , The rolling bearing 10 is exemplified as a ball bearing. The rolling bearing 10 includes two bearing rings 12 . 14 , The bearing rings 12 . 14 are radially offset and arranged coaxially with each other. A bearing ring 14 forms a bearing outer ring of the rolling bearing 10 out. The second bearing ring 12 forms a bearing outer ring of the rolling bearing 10 out. In addition, the rolling bearing 10 a plurality of in a gap 18 between the bearing rings 12 . 14 arranged rolling elements 20 on. According to the design of the rolling bearing 10 as ball bearings are the rolling elements 20 formed as balls. Furthermore, the rolling bearing comprises 10 at least one sealing ring 22 , which is intended to the gap 18 at least substantially seal with an environment and an angle measuring device 24 , which is at least a material measure 26 having. The measuring standard 26 the angle measuring device 24 is at least partially integral with the sealing ring 22 is trained. The sealing ring 22 extends radially between the bearing rings 12 . 14 ,

The measuring standard 26 the angle measuring device 24 is in the in 1 illustrated embodiment on one side of the at least one sealing ring 22 covered. The measuring standard 26 has a plurality of recesses along its circumference 28 on. The sealing ring 22 is intended to allow penetration of contaminants in the intermediate space, leakage of lubricants from the space and / or an entry of particular metal-containing contaminants in the recesses 28 the measuring standard 26 to prevent. Alternatively, the material measure 26 directly from the sealing ring 22 be educated. For this purpose, the sealing ring 22 have along its circumference a plurality of surveys. The sealing ring 22 can preferably be designed as a sheet metal ring, in particular sheet steel ring. Alternatively or additionally, the sealing ring 22 be formed at least partially by a plastic and / or an elastomer. A sealing ring 22 made of a plastic and / or an elastomer can in particular on the material measure 26 be applied, for example by spraying and / or sticking. Alternatively, the material measure 26 to be overmolded with a plastic, which makes the material measure 26 and the sealing ring 22 form an inseparable unit.

The angle measuring device 24 has at least one measuring head 32 on which on a fixed bearing ring 12 is arranged. In the illustrated embodiment, the measuring head 32 arranged on a bearing outer ring. Alternatively, the measuring head 32 However, also be arranged on a bearing inner ring. The at least one sealing ring 22 is on a rotating bearing ring 14 arranged. In the illustrated embodiment, the sealing ring 22 arranged on a bearing inner ring. Alternatively, the sealing ring 22 However, also be arranged on a bearing outer ring. In the formed as a bearing outer ring bearing ring 12 is a circumferential groove 38 introduced, in which the sealing ring 22 at least partially immersed. Next to the sealing ring 22 has the rolling bearing 10 another sealing ring 70 on, which is intended to the gap 18 on one of the sealing ring 22 seal the opposite side.

In the 2 to 6 two further embodiments of the invention are shown. The following descriptions and the drawings are essentially limited to the differences between the embodiments, wherein with respect to the same designated components, in particular with respect to components with the same reference numerals, in principle to the drawings and / or the description of the other embodiment, in particular 1 , can be referenced.

2 shows a sectional view of an axial rolling bearing 10 , The rolling bearing 10 is exemplified as a ball bearing. The rolling bearing 10 includes two bearing rings 12 . 14 , The bearing rings 12 . 14 are axially offset and arranged coaxially with each other. In addition, the rolling bearing 10 a plurality of in a gap 18 between the bearing rings 12 . 14 arranged rolling elements 20 on. According to the design of the rolling bearing 10 as ball bearings are the rolling elements 20 formed as balls. Furthermore, the rolling bearing comprises 10 at least one sealing ring 22 , which is intended to the gap 18 at least substantially seal with an environment and an angle measuring device 24 , which is at least a material measure 26 having. The measuring standard 26 the angle measuring device 24 is at least partially integral with the sealing ring 22 is trained. The sealing ring 22 extends axially between the bearing rings 12 . 14 ,

The measuring standard 26 the angle measuring device 24 is in the in 2 illustrated embodiment on one side of the at least one sealing ring 22 covered. The measuring standard 26 has a plurality of recesses along its circumference 28 on. The sealing ring 22 is intended to allow penetration of contaminants in the intermediate space, leakage of lubricants from the space and / or an entry of particular metal-containing contaminants in the recesses 28 the measuring standard 26 to prevent. Alternatively, the material measure 26 directly from the sealing ring 22 be educated. For this purpose, the sealing ring 22 have along its circumference a plurality of surveys. The sealing ring 22 can preferably be designed as a sheet metal ring, in particular sheet steel ring. Alternatively or additionally, the sealing ring 22 be formed at least partially by a plastic and / or an elastomer. A sealing ring 22 made of a plastic and / or an elastomer can in particular on the material measure 26 be applied, for example by spraying and / or sticking. Alternatively, the material measure 26 to be overmolded with a plastic, which makes the material measure 26 and the sealing ring 22 form an inseparable unit.

The angle measuring device 24 has at least one measuring head 32 on which on a fixed bearing ring 12 is arranged. The at least one sealing ring 22 is on a rotating bearing ring 14 arranged. In the bearing ring 12 is a circumferential groove 38 introduced, in which the sealing ring 22 at least partially immersed. Next to the sealing ring 22 has the rolling bearing 10 another sealing ring 70 on, which is intended to the gap 18 on one of the sealing ring 22 seal the opposite side.

The in the 3 to 6 shown bearings 10 can be used primarily for storage of a machine tool table, which is driven in particular at high speed. Alternatively, the rolling bearings 10 However, in other applications, for example, for the storage of shafts or spindles, in particular of machine tools used.

In the in the 3 to 6 illustrated embodiments, the rolling bearing three rows of rolling bearings 34 . 36 . 44 for storage of the two bearing inner rings 14 . 16 on the bearing outer ring 12 on. The two bearing inner rings 14 . 16 are along the interface 46 in the direction of the axis of rotation 40 around which the two bearing inner rings 14 . 16 revolve, joined together, in the axial section shown by the axis of rotation 40 on both sides of the axis of rotation 40 each form a U-shape of a U lying on the side. The bearing outer ring 12 dives with its radially inner circumference 48 and a certain radially outwardly adjoining area in the space between the two bearing inner rings 14 . 16 a, so called in this room, also bearing receiving space, between the two bearing inner rings 14 . 16 and the bearing outer ring 12 the three rows of rolling bearings 34 . 36 . 44 be included by that in the direction of the axis of rotation 40 middle bearing row 44 a radial bearing is formed and through the two on both sides in the direction of the axis of rotation 40 subsequent rolling bearing rows 34 . 36 in each case a thrust bearing is formed.

It is at least one lubricant supply channel 50 in the bearing outer ring 12 provided in the bearing receiving space between two rows of bearings outside the bearing raceways, here between the rolling bearing row 34 and the rolling bearing row 44 empties. Preference is given in the circumferential direction over the axis of rotation 40 several corresponding lubricant supply channels 50 in the bearing outer ring 12 intended. Each lubricant supply channel 50 extends at least also in the radial direction of the bearing outer ring 12 within the bearing outer ring 12 , In the embodiment shown, the lubricant supply passage extends 50 obliquely to the axis of rotation 40 ,

A supply of the lubricant supply channel 50 via the supply channel 52 , The supply channel 52 extends in the illustrated embodiment, but not necessarily, exclusively in the axial direction in the bearing outer ring 12 and runs parallel to the axis of rotation 40 , On one of the two end faces of the bearing outer ring 12 is the mouth of the supply channel 52 through a sealing element 54 , For example, closed a grub screw.

In one the bearing outer ring 12 carrying housing 56 are a lubricant discharge channel 58 as well as another supply channel 60 provided, which lubricant to the supply channel 52 in the bearing outer ring 12 passes.

In the 4 is a radially extending sensor bore 62 in the bearing outer ring 12 shown in which a temperature sensor 64 is introduced. With the temperature sensor 64 the temperature of the bearing can be detected and the coolant flow through a cooling system can be changed accordingly. The cooling system has cooling channels 66 up, here in the case 56 extend as well as in with the bearing inner rings 14 . 16 circumferential components, see also 3 ,

From the 4 is also a positioning hole 68 seen in the axial direction through the bearing outer ring 12 extends, and which serves to the bearing outer ring 12 suitable in the housing 56 align using a search pen so that the transfer points between the supply channels or the 52 in the bearing outer ring 12 and the one or more supply channels 60 in the case 56 are suitably aligned with each other (see 3 ).

Examples of sealing rings according to the invention 22 are with more details in the 5 and 6 shown. It can be in the 6 illustrated sealing ring 22 as part of an angle measuring device 24 also with the angle measuring device 24 the 5 be provided.

According to the 5 encloses a band-shaped, here hollow cylindrical sealing ring 70 the bearing inner ring 16 along the outer periphery thereof and extending radially outward on the rolling bearing row 34 over into a circumferential groove 38 in the bearing inner ring 16 facing end face of the bearing outer ring 12 , At which the circumferential groove 38 remote axial end of the sealing ring 70 is in the bearing inner ring 16 a radial projection 42 provided, on which the sealing ring 70 to its exact positioning abuts. The lead 42 For example, by introducing a radial groove in the bearing inner ring 16 manufactured. The puncture extends according to an embodiment in the radial direction in the bearing inner ring 16 further inward than a contact surface 72 radially outside on the bearing inner ring 16 , The contact surface 72 serves to receive the sealing ring 70 , In particular, the sealing ring 70 on the contact surface 72 glued on and / or pressed on.

When in the 5 embodiment shown is the bearing inner ring 14 free from a band-shaped sealing ring. Rather, it is at the position at which on the first bearing inner ring 16 the sealing ring 70 is provided, the material measure 26 the angle measuring device 24 positioned. The measuring standard 26 contains, for example, recesses and / or elevations, which are an inductive detection of the angular position of the material measure 26 and thus the bearing inner rings 14 . 16 with a measuring head 32 enable.

Another, but not compelling, detail is in the 5 the transfer point of the lubricant from the supply channel 60 in the supply channel 52 shown in more detail (detail A), namely with a seal 74 , For example in the form of an O-ring, between the housing 56 and the bearing outer ring 12 ,

In the 6 is the possibility of integration of the sealing ring 22 in an angle measuring device 24 shown. In the embodiment shown in detail B covers the sealing ring 22 the material measure 26 to prevent dirt or debris in recesses 28 the measuring standard 26 penetrates / penetrate. Accordingly encloses the sealing ring 22 the material measure 26 on the radial outer side and lies in particular flat on this. Alternatively, the material measure 26 , as shown in detail C, on the sealing ring 22 be arranged. It encloses the material measure 11 the sealing ring 16 on the radial outer side and lies in particular flat on this.

The measuring standard 26 and the sealing ring 22 for example, lie together on the radial projection 42 of the bearing inner ring 14 on. However, it could also be provided different projections. Generally, the alignment of the material measure 26 and / or sealing ring 22 as well as the sealing ring 70 at a projection 42 not necessarily.

In principle it is possible to use the sealing ring 22 at the same time as a material measure 26 to use by the sealing ring 22 corresponding recesses 28 and / or has corresponding elevations from a measuring head 32 can be detected. This is exemplified in the details D and E in the 6 shown. Here is also a survey shown schematically 30 indicated.

The detail E of 6 also shows a possibility that the sealing ring 22 not in a circumferential groove in the bearing outer ring 12 dips, but only the front surface of the bearing outer ring 12 facing each other so that only one sealing gap remains.

LIST OF REFERENCE NUMBERS

10

Rolling

12

bearing ring

14

bearing ring

16

bearing ring

18

gap

20

rolling elements

22

seal

24

Angle measuring device

26

Measuring standard

28

recess

30

survey

32

probe

34

roller bearing row

36

roller bearing row

38

circumferential groove

40

axis of rotation

42

head Start

44

roller bearing row

46

interface

48

scope

50

Lubricant supply channel

52

supply channel

54

sealing element

56

casing

58

Lubricant discharge channel

60

supply channel

62

sensor hole

64

temperature sensor

66

cooling channel

68

positioning bore

70

seal

72

contact surface

74

seal

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014203517 A1 [0002]
• DE 112009000106 T5 [0003]

Claims (13)

Rolling bearing with at least two bearing rings (12, 14, 16), with a plurality of in a space (18) between the bearing rings (12, 14, 16) arranged rolling elements (20), with at least one sealing ring (22), which provided is at least substantially seal the intermediate space (18) with respect to an environment, and with an angle measuring device (24) having at least one material measure (26), characterized in that the material measure (26) of the angle measuring device (24) at least partially integral with the sealing ring (22) is formed. Rolling bearings after Claim 1 , characterized in that the material measure (26) of the angle measuring device (24) of the at least one sealing ring (22) is formed or at least on one side of the at least one sealing ring (22) covered. Rolling bearings after Claim 1 or 2 , characterized in that the material measure (26) has along its circumference a plurality of recesses (28) and / or elevations (30). Rolling bearing according to one of the preceding claims, characterized in that the at least one sealing ring (22) as a sheet metal ring, in particular sheet steel ring, is executed. Rolling bearing according to one of the preceding claims, characterized in that the at least one sealing ring (22) is arranged on a rotating bearing ring. Rolling bearing according to one of the preceding claims, characterized in that the angle-measuring device (24) has at least one measuring head (32) which is arranged on a stationary bearing ring. Rolling bearing according to one of the preceding claims, characterized in that the bearing rings (12, 14) are arranged coaxially to one another and the sealing ring (22) extends radially between the bearing rings (12, 14). Rolling bearings according to one of Claims 1 to 6 , characterized in that the bearing rings (12, 14) are arranged coaxially with each other and the sealing ring (22) extends axially between the bearing rings (12, 14). Rolling bearings according to one of Claims 1 to 6 characterized by two mutually mounted bearing inner rings (14, 16) and a bearing outer ring (12), wherein the bearing outer ring (12) in the region of its radially inner circumference on both sides together from the bearing inner rings (14, 16) is included; and the two bearing inner rings (14, 16) by means of at least two rolling bearing rows (34, 36) are mounted on the bearing outer ring (12), wherein on at least one of the two bearing inner rings (14, 16) of the at least one sealing ring (22) is applied, the the bearing inner ring (14, 16) encloses along its outer circumference and extending to the radially outer seal at least one of the roller bearing rows (34, 36) along this or past this in the direction of the bearing outer ring (12). Rolling bearings after Claim 9 , characterized in that the at least one sealing ring (22) is hollow cylindrical or hollow truncated cone. Rolling bearings after Claim 9 or 10 , characterized in that the at least one sealing ring (22) on the outer periphery of the bearing inner ring (14, 16) is pressed. Rolling bearings according to one of Claims 9 to 11 , characterized in that in at least one end face of the bearing outer ring (12) has a circumferential groove (38) is introduced into which the at least one sealing ring (22) is immersed. Rolling bearings according to one of Claims 9 to 12 , characterized in that the at least one sealing ring (22) abuts in the direction of a rotation axis (40) on a radially outwardly directed projection (42) of the bearing inner ring (14, 16).

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