DE102023104993A1 - Rolling bearing device - Google Patents

Abstract

The invention relates to a rolling bearing device (1) which is formed from at least one rolling bearing (2), a seal (3) and a bypass device (20) and also has a first machine element (30) and a second machine element (31). At least one electrical connection between the first machine element (30) and the second machine element (31) is formed via the bypass device (20). A centrifugal disk (13) is connected to one of the bearing rings (5, 6), which is in electrical contact with it and is electrically contacted radially by the bypass conductor (23). The centrifugal disk (13) partially projects beyond the axially continuous recesses (26) at a radial distance (s) from the axis of rotation (16) of the rolling bearing (2).

Description

Field of the invention

The invention relates to a rolling bearing device which is formed from at least one rolling bearing and a bypass device.

Background of the invention

Rotor shafts in electrical machines are usually supported by rolling bearings. Unwanted voltage potentials often arise between the rotor shafts and housings of electric motors and generators. If countermeasures are not taken, these voltage potentials are discharged via the rolling bearings. The current flowing through the affected rolling bearing can generate sparks in the rolling contact between the rolling elements and the raceways. The rolling raceways are damaged by melting depressions or erosion depressions.

Measures are already known to prevent the build-up of voltage potentials or the reduction of these voltage potentials via the rolling bearings. For example, bypass devices are used with which discharges are guided "around" the rolling bearings of the electric motor via so-called shaft grounding rings. In EN 10 2016 010 926 A1 discloses such a bypass device consisting of a shaft grounding ring. This shaft grounding ring has a disk-shaped, electrically conductive bypass conductor which is clamped between two conductive angle plates towards the housing and which rests against a shaft in an elastically prestressed manner on the inside. The angle plates forming the holder of the bypass conductor are inserted into a housing at any suitable location. The bypass conductor is made of conductive material which has a lower resistance to flowing currents than, for example, steel. The advantage of such a bypass device is that the shaft grounding ring is simple and inexpensive to manufacture.

Bypass conductors are also often integrated into sealing devices by experts. An example of a bypass conductor seal is EN 10 2014 010 269 B4 disclosed. The pre-seal is connected in series upstream of a main seal and at the same time acts as a bypass conductor to create an electrically conductive connection between two machine elements. The disk-shaped bypass conductor is also intended to protect the sealing lip of the main seal against contamination from the environment and is attached to the main seal. The main seal sits in the housing with a holder made from an angle plate.

In general, rolling bearing manufacturers are interested in using such bypass conductors in the direct and immediate vicinity of the rolling bearings, which can be exposed to the damage described above due to the reduction of the voltage potentials. In addition, the bypass conductors should be housed in the most space-saving way possible. For this reason, such bypass conductors are integrated, for example, into the main seals of rolling bearings. Such a device is available with EN 10 2015 240 44 A1 The main seal used in this device is interspersed with conductive filler.

Description of the invention

The object of the invention is to provide an improved rolling bearing device which can be manufactured easily and inexpensively.

The problem is solved according to the subject matter of claim 1.

The rolling bearing device is formed from at least one rolling bearing and a bypass device and also has a first machine element and a second machine element. The rolling bearing has a first bearing ring and a second bearing ring, wherein the bearing rings are arranged concentrically on an axially aligned axis of rotation of the rolling bearing and are provided with rolling elements arranged radially between the bearing rings. At least one electrical connection is formed between the first machine element and the second machine element via the bypass device, which has a holder and at least one electrically conductive bypass conductor, wherein the holder and bypass conductor are electrically conductively connected to one another and the holder is fastened to one of the bearing rings, which in turn is fastened to the machine element and has axially continuous recesses and holds the bypass conductor. A bearing interior is formed between the bearing rings and the bypass device. As previously described, bypass devices are mostly used in conjunction with seals, or at least where there is little lubricant contact, so as not to impair their effectiveness. The present invention consciously accepts this in order to provide a bypass device for applications with lubricant contact and to improve the lubricant conditions. The centrifugal disk connected to the other of the bearing rings, which extends from one of the bearing rings into the bearing interior and is in electrical contact with it, and is also electrically contacted radially by the bypass conductor, therefore serves on the one hand to conduct current, and on the other hand to set a desired lubricant flow. The centrifugal disk can together with the bypass device, they also act in principle as a throttle, whereby the centrifugal disk according to the invention partially projects beyond the axially continuous recesses of the holder at a radial distance from the axis of rotation of the rolling bearing.

In a preferred embodiment, the holder is attached radially between one of the bearing rings and one of the machine elements to one of the bearing rings and holds the bypass conductor. One of the bearing rings is seated in one of the machine elements or on one of the machine elements. The holder is seated, for example, on an outer ring radially between the outer ring and a housing or alternatively on an inner ring radially between the inner ring and a shaft.

In another preferred embodiment, it is provided that the bypass conductor, which is held by the holder, which is attached to one of the bearing rings radially between one of the bearing rings and one of the machine elements, consists of loop-shaped embroidered fibers.

The term "embroidered fibers" refers to both individual fibers and fiber pairs or bundles of fibers. The term embroidery subsequently describes any joining of fibers, fiber pairs or bundles that uses an additional thread to connect them. Sewing, crocheting or similar can therefore also be seen as equivalent.

For carbon fiber components, semi-finished fabrics are usually used due to cheaper and simpler manufacturing processes, and are then laminated into a polymer matrix. Positioned fibers, also known as "tailored fiber placement," are currently only used for aesthetic reasons in visible carbon components or for the targeted stiffening of functional components, as this creates a very high level of effort in production. Thus, for these reasons, a special, cost-intensive technology is used here to specifically exploit the conductive properties of carbon fibers. The term "embroidered fibers" used below refers to both individual fibers and fiber pairs or fiber bundles. The term embroidery describes any joining of fibers, fiber pairs or bundles that uses an additional thread to connect them. Sewing, crocheting or similar can also be seen as equivalent.

As previously mentioned, the holder has a retaining ring or more retaining rings and a retaining disk or more retaining disks. The invention provides that the holder or the retaining ring is provided with at least one, preferably several recesses distributed on the circumference around the axis of rotation of the rolling bearing arrangement, extending axially continuously through a base body that extends essentially radially and is designed in the shape of an annular disk. In one embodiment, the retaining disk engages in the recess with at least one retaining clip and is held on the base body. The bypass conductor is held axially between the electrically conductive retaining ring and the retaining disk. The retaining clip or the retaining clips are latched or hooked into the recess in a form-fitting and/or force-fitting manner. Such an arrangement is advantageously easy to assemble. The individual parts of the holder can be manufactured inexpensively from sheet metal.

Another possibility for implementing the rolling bearing device is that one or more clamping elements or retaining clips formed on the retaining disk or separately, each one or more than one, engage in one of the recesses and hold the retaining disk and the retaining ring together in a form-fitting manner. The bypass conductor is clamped axially between the clamping element and the holder or between the retaining disk and the retaining ring. The clamping element can, for example, be a simple clip that is inserted into the recess or the clamping element or retaining clip are formed on the retaining ring of the holder. Clamping elements are clamped to the retaining ring in a detachable or non-detachable manner and retaining clips are, for example, clipped or snapped into the recesses in a form-fitting manner and can also be detachable again under certain circumstances.

It is conceivable that the holding element has one or more clamps distributed around the circumference of one of the bearing rings and that the clamps are pre-tensioned radially between one of the machine elements and one of the bearing rings against one of the bearing rings, with a recess being formed between two adjacent clamps that extends axially continuously through the electrically conductive holder and spaced the two adjacent clamps apart from one another in the circumferential direction. A holding clip or a clamping element engages in at least one of the recesses in a form-fitting manner, with the bypass conductor being clamped axially between the holding disk and the holder or between the clamping element and the holder by means of the holding clip or clamping element.

The rolling contacts are the contacts on which, during operation or when the respective rolling bearing, the rolling elements rest on the raceways. The zones of rolling contact are therefore the zones in which the rolling elements roll on the rolling raceways of the bearing rings when the rolling bearing is in operation. The electrically conductive connection for discharging the voltage potentials between the first and second machine elements is established by means of the bypass device. As already mentioned at the beginning, the machine elements housing or shafts can alternatively be other machine parts. According to one embodiment of the invention, it is provided that the second machine element is the inner ring of the rolling bearing.

One embodiment of the invention provides that the electrical resistance of the bypass conductor or the bypass device is less than or equal to 100 ohms, which has proven to be the ideal range. The bypass conductor preferably has at least some conductive fibers.

One or more bypass devices are integrated into the rolling bearing device. The advantage of the invention is that the bypass conductor is integrated into the rolling bearing and is nevertheless attached to the rolling bearing in such a way that it is not attached inside the rolling bearing but in the bearing seat to save radial space - i.e. on the outside of the rolling bearing between a housing or a shaft or other machine elements and one of the bearing rings of the rolling bearing. No separate axial installation space is required for attaching the bypass conductor. The radial installation space is already available due to the dimensions of the rolling bearing. This has a particularly positive effect on the application in rolling bearing devices with rolling bearings of small diameter series. The limited space can be used entirely by the bypass device. The components for attaching the bypass conductor therefore do not have to be so delicate and can therefore often be manufactured more cost-effectively.

At least one electrical connection is formed at least between the first and the second machine element via the bypass device. It is therefore also conceivable that further electrically conductive connections between other machine elements are formed permanently or even preferably switchable on and off via the bypass device.

The bypass device is made up of one or more holders and one or more electrically conductive bypass conductors. According to the invention, the holder sits in or on one of the bearing rings of the rolling bearing. It is therefore integrated into the rolling bearing or into the bearing seat of the rolling bearing and sits either on the inner ring or on the outer ring. The holder is a component of any design that is suitable for holding the bypass conductor in the rolling bearing.

The advantage is that the rolling bearing including the bypass device can be supplied as a single unit by the rolling bearing manufacturer. Assembly time and storage space are saved both for the rolling bearing manufacturer's customer and for the rolling bearing manufacturer itself. The properties of the bypass conductor can be precisely tailored to the bearing's passage or discharge resistance.

The respective holder and the bypass conductor are connected to each other in an electrically conductive manner. In general, the bypass device is designed in such a way that voltage potentials are discharged via this bypass device and not via the rolling bearing.

Two machine elements are mounted so that they can rotate relative to one another using the at least one rolling bearing. One of the machine elements or the other machine element is mounted so that it can rotate around the rotation axis of the rolling bearing using the rolling bearing, or one or the other machine element is fixed to the housing. Alternatively, both machine elements are arranged so that they can rotate relative to one another around the rotation axis of the rolling bearing. Machine elements are shafts, for example rotor shafts of an electrical machine, housings, for example bearing shields or housings or housing sections or bearing shields of an electrical machine, gears or shafts or housings of a transmission, or any other machine elements that are suitable for being mounted on or against one another using rolling bearings.

In the cases considered, the rotation axis of the rolling bearing is always axially aligned, but can run horizontally, vertically or at an angle in space. Radial is perpendicular to the rotation axis.

The rolling bearing is used for the rotatable mounting of machine parts, elements and assemblies and has rolling elements to reduce friction, which roll between the inner ring and the outer ring and thus reduce the friction in the rotatable bearing. The rolling bearing has, as already explained, an inner ring and an outer ring. Alternatively, the rolling bearing also has more than just an inner and/or outer ring. In addition, the bearing rings are also split and each have a raceway or a portion of a raceway. One or more outer raceways are usually formed on the inner ring and one or more inner raceways on the outer ring. The rolling elements rolling on the raceways The rolling elements are either balls or rollers. The balls or rollers are often guided and held in cages. The rolling elements of a rolling bearing are either arranged in a row one behind the other in the circumferential direction or, alternatively, the rolling bearing has several rows of rolling elements arranged next to one another.

In the sense of the invention, the bypass is understood to mean the bypassing of a current or a voltage around one or more rolling bearings and/or machine parts. The rolling elements and the bearing rings are usually made of rolling bearing steel and touch each other at the raceways. The contact zones formed are potential passages for currents where the dreaded discharges lead to the damage to the raceways already described in the chapter "Background of the invention".

The currents are to be diverted through the bypass or the bypass device. This can be "controlled" by the fact that the bypass device or in any case the bypass conductor has comparatively lower electrical or specific electrical resistances than the rolling bearing.

It is conceivable that the rolling bearings are insulated against the passage of current. For example, it is conceivable that an insulator or an insulating layer is applied between the bearing ring or bearing rings and the machine element on/in which the bearing ring sits. In this case, the bypass only guides the discharges past the rolling bearing via the bypass elements of the bypass device attached to the rolling bearing, but not through the rolling bearing. In this case, the holder sits on or on the insulated bearing ring, but has conductive contact with the machine element. For example, the holder sits on the outer ring and is elastically spring-loaded against the housing. Alternatively, or in combination with other measures, it is also conceivable that the rolling elements are made of a non-electrically conductive material such as ceramic. In this case, the bypass device only has to redirect the current.

The advantage of the invention is that the design of the bypass is directed at current conductivity and lubricant throttling, but not at a sealing function. If, as already mentioned at the beginning of the discussion on the state of the art, bypass conductors are integrated into sealing systems, compromises must be made with regard to the choice of material properties of the seals and also of the bypass conductor. When designing the bypass conductor of a bypass device according to the invention, only the requirements for current conductivity and wear resistance must be taken into account when selecting and designing the material. In the bypass holder or the bypass device, a freely permeable passage for media from the environment in front of the bypass holder into the intermediate space is guaranteed.

One way of implementing the rolling bearing device is to design the holding element or the holding ring in such a way that it has several clamps distributed around the circumference of one of the bearing rings or the holding elements are such clamps. These clamps are arranged radially between the bearing ring and the machine element, for example between the outer ring and a housing or between the inner ring and a shaft, and axially overlap the bearing ring and radially engage behind the bearing ring. The clamps are designed to be elastically springy and are preloaded radially between one of the machine elements and one of the bearing rings against one of the bearing rings.

The advantage of this is that the zones on the bearing ring to which the retaining ring is attached or against which the holding elements are pre-tensioned against the bearing ring do not have to be finely machined, because the holding elements are at least radially elastically pre-tensioned against this zone. The elasticity of the individual holding elements is ensured by the fact that they are separated from one another on the circumference around the rotation axis of the rolling bearing by the axially continuous recesses. As a result, the holding elements are extended from a base on the retaining ring by a radially extending elastic lever. In conjunction with a snap geometry, the holding element can bridge large tolerances when pressed on and is securely fixed axially and radially. The retaining rings are easy and inexpensive to manufacture from sheet metal or spring steel.

Another possibility for implementing the rolling bearing device is that one or more clamping elements or retaining clips formed on the retaining disk or separately, each one or more than one, engage in one of the recesses and hold the retaining disk and the retaining ring together in a form-fitting manner. The bypass conductor is clamped axially between the clamping element and the holder or between the retaining disk and the retaining ring. The clamping element can, for example, be a simple clip that is inserted into the recess, or the clamping element or retaining clip are formed on the retaining ring of the holder. Clamping elements are clamped to the retaining ring in a detachable or non-detachable manner, and retaining clips are, for example, clipped or snapped into the recesses in a form-fitting manner and can also be detachable again under certain circumstances.

It is also conceivable that the holder is in contact with one of the bearing rings in an electrically conductive manner. The holder is made of electrically conductive material or has a conductive coating or is provided with conductive elements. It is crucial that an electrically conductive connection is formed between the machine element and the holder either via the electrically conductive bearing ring or in direct contact with the holder. The bearing ring is made of a conductive material or has an electrically conductive coating. In this case, it can generally be assumed that the electrical resistance of the bypass device is lower than the electrical resistance in the passage through the rolling contacts of the rolling bearing.

The rolling contacts are the contacts where the rolling elements rest on the raceways when the respective rolling bearing is in operation or at a standstill. The rolling contact zones are therefore the zones in which the rolling elements roll on the rolling raceways of the bearing rings when the rolling bearing is in operation. The electrically conductive connection for discharging the voltage potentials between the first and second machine elements is created using the bypass device. As already mentioned at the beginning, the machine elements housings or shafts can alternatively be other machine parts.

The rolling bearing with all the components mentioned so far, possibly also in combination with one or both machine elements, is designed as a self-retaining structural unit according to an embodiment of the invention. With such a structural unit, on the one hand, the storage and transport capacities are kept positively small and, on the other hand, the effort involved in installing the rolling bearing device in a vehicle transmission, an electrical machine, an electrically operated axle or in any other system is advantageously lower than if the components were installed individually.

The rolling elements of the rolling bearings concerned by the invention can be guided between the bearing ring with or without cage(s). A cage has one or two side edges. Cages with only one side edge are crown- and/or comb-shaped, i.e. the cage webs protrude from the side edge in the axial direction like the teeth of a crown or the prongs of a comb. The gaps between the prongs or prongs that are adjacent in the circumferential direction are the pockets in which the rolling elements are accommodated. The cages are designed in imaginary unfoldings in flat planes for balls in the manner of a perforated strip and for rollers in a ladder-shaped manner. In both cases, the cage webs connect two side edges that run parallel to one another. The gaps that appear hole- or window-shaped in the flat planes are three-dimensional pockets formed in the circumferential direction between the cage webs in which the rolling elements are accommodated.

As mentioned above, gearbox manufacturers often fight for every millimeter of installation space. This also affects the requirements for the rolling bearings, which consequently have to be designed in the most axially space-saving way possible. The aforementioned measure also helps to save axial installation space. This advantage arises from the fact that the holding elements of the holding ring overlap the bearing ring in the axial direction and engage radially behind it. For this purpose, as provided in one embodiment of the invention, a radial annular gap is formed between the bearing ring and the machine element. The holding elements engage axially from one side of the end of the bearing ring into the annular gap formed, for example, between the outer ring and the housing. Existing installation space is used without the bearing ring having to be extended axially for the purpose of a holding zone for fastening the bypass device.

Description of the drawings

• - 1 - ein Ausführungsbeispiel eines erfindungsgemäßen Wälzlagers 2 in einem Teilschnitt entlang der Rotationsachse 16 einer räumlichen Darstellung des Wälzlagers 2;
• - 2 - eine Frontalansicht des Wälzlagers 2 nach 1;
• - 3 - ein Ausführungsbeispiel des Bypass-Leiters 23 mit schlaufenförmig verstickten Fasern;

The invention is explained in more detail below using exemplary embodiments. They show:

• - 1 - an embodiment of a rolling bearing 2 according to the invention in a partial section along the rotation axis 16 of a spatial representation of the rolling bearing 2;
• - 2 - a front view of the rolling bearing 2 after 1 ;
• - 3 - an embodiment of the bypass conductor 23 with loop-shaped embroidered fibers;

1 - The rolling bearing 2 has at least one first bearing ring 6 designed as an inner ring 12 and a second bearing ring 5 designed as an outer ring 11, as well as a bypass device 20. The bearing rings 5 and 6 are arranged concentrically on the rotation axis 16 of the rolling bearing 2. The rolling bearing 2 designed as a deep groove ball bearing is provided with rolling elements 8 arranged radially between the bearing rings 5 and 6, which are balls. The balls are arranged in a cage 7. The inner ring 12 is provided on the inside and on the side of the bypass device 20 at a diameter step with an inner cylindrical inner seat surface 38 on which the centrifugal disk 13 sits, for example held by a press fit. The diameter step results from the fact that the diameter of the inner seat surface 38 is larger than the diameter of the inner ring 12 inside for the Shaft seat. The bypass conductor makes radial electrical contact with the centrifugal disk 13. A bearing channel space 19 is formed between the bearing rings 5,6 and the bypass device 20, into which the centrifugal disk 13 projects from one of the bearing rings 5,6.

The bypass device 20 has a holder 21, a holding disk 24, an electrically conductive bypass conductor 23 and the centrifugal disk 13. Holding elements 25 are formed on a radially extending base body 27 of a holding ring 22 of the holder 21. The outer ring 11 is provided on the outside with a diameter step on which an outer seat surface 39 is formed. The cylindrically formed outer seat surface 39 has a diameter that is smaller than the outer diameter of the outer ring 11 for the housing seat. The outer seat surface 39 is axially connected to a radial recess 40, which could consist of recesses 40 adjacent to one another on the circumference, but in this case is formed as an annular groove 40. Clamps 29 of the holding elements 25 are radially spring-elastic and are pushed onto the overhang during assembly, moving elastically outwards and extending axially over the outer seat surface 39 to the annular groove 40. They preferably lie radially against the outer seat surface 39 or are radially preloaded against it.

The bypass conductor 23 is clamped axially between the retaining disk 24 and a base body 27 of the retaining ring 22. In the rolling bearing 2, there is an electrical connection between the outer ring 11 via the clamps 29 and the ring disk 22 to the bypass conductor 23 and from the bypass conductor 23 radially to the centrifugal disk 13 and from the centrifugal disk 13 to the inner ring 12. The centrifugal disk 13 partially projects beyond the axially continuous recesses 26 at a radial distance s from the rotation axis 16 of the rolling bearing 2. This is to be understood in such a way that the outer distance s1 of the centrifugal disk 13 is greater than the minimum distance s2 of the axially continuous recess.

2 - The front of the rolling bearing 2 is essentially covered on one side by the retaining ring 22. The retaining ring 22 is provided with recesses 26 that extend axially through it. In this case, the recesses 26 are open radially outwards and are delimited on both sides in the circumferential direction by a lever arm 37 of a holding element 25 and in the radial direction inwards by the base body 27 of the retaining ring 22. Alternatively, it is also possible for the recesses to be windows in a form not shown, which are also delimited radially outwards by the material of the base body 27. The recesses 26 can have either curved contours or the rectangular contours shown. The respective retaining clip 28 reaches axially through the respective recess 26 and is positively attached to the retaining ring 22.

3 - The bypass conductor 23 is shown schematically with regard to its structure. The loop-shaped fibers 61 of the bypass conductor 23 are, for example, embroidered in a meander shape. The loops 62 are formed on both the distal and the proximal side towards the bypass conductor center. Furthermore, a concentrically arranged fiber bundle 64 is shown, which can serve to improve fiber cohesion.

Reference symbols

1

Rolling bearing device

2

Rolling bearings

3

-

4

Housing

5

first bearing ring

6

second bearing ring

7

cage

8

Rolling elements

9

Wave

10

-

11

Outer ring

12

Inner ring

13

Centrifugal disc

14

Cage bag

15

Cage bridge

16

Rotation axis of the rolling bearing

17

Page margin

18

-

19

Warehouse interior

20

Bypass device

21

Bypass device holder

22

Retaining ring

23

Bypass conductor

24

Retaining disc

25

Holding element

26

Recess

27

Base body of the holder

28

Retaining clip

29

bracket

30

first machine element

31

second machine element

32

Clamping element

33

Annular gap

34

seal

35

-

36

-

37

Lever arm

38

Interior seating

39

-

40

radial recess, annular groove

//

//

61

Looped embroidered fibres

62

Loops

63

-

64

Concentrically arranged fiber bundle

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 accepts no liability for any errors or omissions.

Cited patent literature

• DE 102016010926 A1 [0003]
• DE 102014010269 B4 [0004]
• DE 10201524044 A1 [0005]

Claims (9)

Rolling bearing device (1) which is formed from at least one rolling bearing (2) and a bypass device (20) and also has a first machine element (30) and a second machine element (31), wherein: - the rolling bearing (2) has a first bearing ring (5) and a second bearing ring (6), and wherein the bearing rings (5, 6) are arranged concentrically on an axially aligned axis of rotation (16) of the rolling bearing (2), - the rolling bearing (2) is provided with rolling elements (8) arranged radially between the bearing rings (5, 6), - at least one electrical connection between the first machine element (30) and the second machine element (31) is formed via the bypass device (20), - the bypass device (20) has a holder (21) and at least one electrically conductive bypass conductor (23), and wherein the holder (21) and bypass conductor (23) are electrically connected to one another, - the holder (21) is fastened to one of the bearing rings (5, 6) and has axially continuous recesses (26), and holds the bypass conductor (23), wherein one of the bearing rings (5, 6) is fastened to the machine element (30, 31), - a bearing channel space (19) is formed between the bearing rings (5, 6) and the bypass device (20), characterized in that - a centrifugal disk (13) is connected to the other of the bearing rings (5, 6) and is in electrical contact with it, - the bypass conductor (23) electrically contacts the centrifugal disk (13) radially, - the centrifugal disk (13) projects from one of the bearing rings into the bearing channel space (19) - the centrifugal disk (13) partially surrounds the axially continuous recesses (26) at a radial distance (s) of the rotation axis (16) of the rolling bearing (2). Rolling bearing device (1) according to Claim 1 , characterized in that the holder (21) is arranged radially between one of the bearing rings (5, 6) and one of the machine elements (30, 31). Rolling bearing device (1) according to Claim 1 or 2 , characterized in that the bypass conductor (23) comprises loop-shaped embroidered fibers. Rolling bearing device (1) according to Claim 1 , characterized in that the holder (21) has at least one retaining ring (22) and a retaining disk (24), wherein the retaining ring (22) is provided on the outside with at least one retaining element (25) which extends axially in the same direction as the axis of rotation (16) between a housing (4) and one of the bearing rings (5, 6), with which the holder is held on one of the bearing rings (5, 6), and wherein the bypass conductor (23) is held axially between the electrically conductive retaining ring (22) and the retaining disk (24). Rolling bearing device (1) according to Claim 1 , wherein the holder (21) has a retaining ring (22) and a retaining disk (24), wherein the retaining ring (22) is provided with at least one recess (26) extending axially continuously through a radial base body (27), and wherein the retaining disk (24) engages in the recess (26) with at least one retaining clip (28) and is held on the base body (27), and wherein the bypass conductor (23) is held axially between the electrically conductive retaining ring (22) and the retaining disk (24) or between the retaining clip (28) and the retaining ring (22). Rolling bearing device (1) according to Claim 1 , in which the holding element (25) has one or more clamps (29) distributed around the circumference of one of the bearing rings (5, 6), and the clamps (29) are prestressed radially between one of the machine elements (30, 31) and one of the bearing rings (5, 6) radially against one of the bearing rings (5, 6), wherein between two adjacent clamps (29) a recess (26) is formed which extends axially continuously through the electrically conductive holder (21) and spaced the two adjacent clamps (29) from one another in the circumferential direction, wherein a holding clip (28) or a clamping element (32) engages in at least one of the recesses (26) in a form-fitting manner, wherein the bypass conductor (23) is axially connected between the holding disk (24) and the holder (21) or the clamping element (32) and the holder (21) by means of the holding clip (28) or clamping element (32). is trapped. Rolling bearing device (1) according to one of the preceding claims, characterized in that the first machine element (30) is a housing (4) and one bearing ring (6) of the bearing rings (5, 6) is an outer ring (12) of the rolling bearing (2) seated in the housing (4). Rolling bearing device (1) according to one of the preceding claims, characterized in that the second machine element (31) is the second bearing ring (5) designed as at least one inner ring (11). Rolling bearing device (1) according to one of the preceding claims, characterized in that the bypass conductor (23) has a fabric-like Structure with at least some conductive fibers, wherein the bypass device (20) or the bypass conductor (23) has an electrical resistance less than or equal to 100 ohms.

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