DE102019134129A1 - Rolling bearing arrangement and method for producing a rolling bearing arrangement - Google Patents

Abstract

The invention relates to a rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4) and rolling elements (5), the inner ring (3) having an inner ring raceway (6) and the outer ring (4) ) has an outer ring raceway (7), the rolling elements (5) rolling between the inner ring (3) and outer ring (4) and rolling on the inner ring raceway (6) and the outer ring raceway (7).
According to the invention, the inner ring (3) has an inner ring recess (8) and / or the outer ring (4) has at least one outer ring recess (9) in and / or on which a power line support device (10) is received, on which power line elements (11) are so arranged and are configured that an electrically conductive connection is established between the inner ring (3) and the outer ring (4).

Description

Field of invention

The invention relates to a roller bearing arrangement, comprising a roller bearing with an inner ring, an outer ring and rolling elements, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements rolling between the inner ring and the outer ring and rolling on the inner ring raceway and the outer ring raceway. The invention also relates to a method for producing a roller bearing arrangement.

Background of the invention

When using rolling bearings, e.g. in or on electrical machines or within a hybridized drive train of a motor vehicle, current can pass through. The switching pulses from converters lead, for example, to the build-up of voltage between the bearing rings of rolling bearings. This tension is relieved again and again by breakdowns. Under unfavorable conditions, this can lead to current passage damage to raceways and rolling elements. There is thus the risk of a premature and unexpected failure of the bearing and thus of the entire electrical machine. In addition to the increased maintenance effort, the downtime of the machine results in additional costs.

Current-insulated rolling bearings which are intended to prevent harmful bearing currents are known from the prior art. For example, rolling bearings with ceramic insulation on the outer or inner ring are used. However, electrically insulated rolling bearings are comparatively expensive and are therefore not used very often.

Object of the invention

In light of the known prior art, the invention is therefore based on the object of providing a roller bearing arrangement which transfers electrical current between the inner ring and outer ring of a roller bearing reliably and with little wear between the inner ring and outer ring and which can be manufactured inexpensively.

Description of the invention

This object is achieved by a rolling bearing arrangement, comprising a rolling bearing with an inner ring, an outer ring and rolling elements, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements being supported by rolling between the inner ring and the outer ring and rolling on the inner ring raceway and the outer ring raceway, wherein the inner ring has an inner ring recess and / or the outer ring has at least one outer ring recess, in and / or on which a power line carrier device is received, on which power line elements are arranged and configured so that a current-conducting connection is established between the inner ring and the outer ring.

As a result, the inner ring is electrically connected to the outer ring, so that there are no electrical potential differences between the inner ring and the outer ring.

First, the individual elements of the claimed subject matter of the invention are explained in the order in which they are named in the set of claims and particularly preferred embodiments of the subject matter of the invention are described below.

Rolling bearings can in particular be used to transmit rotary movements with the lowest possible friction losses. Rolling bearings can be used in particular to fix axles and shafts, whereby, depending on the design, they absorb radial and / or axial forces and at the same time enable the rotation of the shaft or the components mounted on an axle in this way. For this purpose, rolling elements are arranged between an inner ring and an outer ring of the roller bearing. Between these three main components, the inner ring, outer ring and the rolling elements, mainly rolling friction usually occurs within the rolling bearing. Since the rolling elements in the inner and outer ring can preferably roll on hardened steel surfaces with optimized lubrication, the rolling friction of such bearings is relatively low.

The inner ring can, in particular, connect the shaft that receives the roller bearings to the roller bearing or the roller bodies. In particular, the shaft can be connected to the side of the outer surface of the inner ring facing the shaft, with the rolling elements of the roller bearing rolling on the inner ring raceway opposite this outer surface. The inner ring can be formed from a metallic and / or ceramic material. It is basically conceivable to design the inner ring in one piece or in several parts, in particular in two parts.

According to the invention, the inner ring has an inner ring recess. In particular, a cover disk, sealing disk and / or seal can be arranged in an inner ring recess, in particular in a force-locking and / or form-locking manner. The inner ring recess is preferably designed as a circumferential groove in the inner ring.

The outer ring can in particular support the roller bearing with the roller bearing or connect the rolling elements. In particular, the bearing can be connected to the side of the outer ring surface facing the bearing, with the outer ring raceway opposite this outer ring rolling the rolling elements of the rolling bearing. The outer ring can be formed from a metallic and / or ceramic material. It is basically conceivable to design the outer ring in one piece or in several parts, in particular in two parts.

According to the invention, the outer ring has an outer ring recess. In particular, a cover disk, sealing disk and / or seal can be arranged in a non-positive and / or form-fitting manner in an outer ring recess. The outer ring recess is preferably designed as a circumferential groove in the outer ring.

The rolling elements can roll inside the rolling bearing, in particular on the inner ring raceway of the inner ring. For this purpose, the surface of the inner ring raceway can advantageously be made correspondingly wear-resistant, for example also by means of a corresponding surface treatment method and / or by applying a corresponding additional material layer. The inner ring raceway can be flat or profiled. A profiled design of the inner ring raceway can be used, for example, to guide the rolling elements on the inner ring raceway. A planar shape of the inner ring raceway can, however, allow, for example, a certain axial displaceability of the rolling bodies on the inner ring raceway.

The rolling bodies can roll within the rolling bearing, in particular on the outer ring raceway of the outer ring. For this purpose, the surface of the outer ring raceway can advantageously be made correspondingly wear-resistant, for example also by means of a corresponding surface treatment process and / or by applying a corresponding additional material layer. The outer ring raceway can be flat or profiled. A profiled configuration of the outer ring raceway can be used, for example, to guide the rolling elements on the outer ring raceway. A planar formation of the outer ring raceway can, however, allow, for example, a certain axial displaceability of the rolling bodies on the outer ring raceway.

According to a preferred embodiment of the invention, it can be advantageous that the power line support device comprises a first electrically conductive wire and a second electrically conductive wire, which are arranged around one another in the manner of a double helix, so that a plurality of form of receiving pockets in which the power line elements are received. In this way, a power line carrier device that can be manufactured particularly inexpensively can be realized.

It can furthermore be advantageous that the current conducting elements are designed as electrically conductive fleece, copper wire and / or grinding brushes.

In a further development of the invention, it can furthermore be preferred that the inner ring has an inner ring recess and / or the outer ring has an outer ring recess in and / or on which a sealing washer is fixed, which extends essentially in the radial direction between the inner ring and the outer ring, with the power conduction elements make electrically conductive contact with the sealing washer. As a result, the distance between the current conducting elements and the sealing washer, which is electrically conductively connected to the inner ring and / or outer ring, can be kept as small as possible. The sealing washer is formed in particular from an electrically conductive material.

Furthermore, it can be advantageous that the power line carrier device is arranged in and / or on the sealing washer, which is fixed in the inner ring recess and / or the outer ring recess. This has the advantage that the power line support device and the sealing washer can be designed as one structural unit, and the sealing washer with the power line support device can be installed in the roller bearing in one assembly step.

According to a further advantageous embodiment of the invention, it can be preferred that the roller bearing has an L-shaped second sealing washer, which is fixed to the inner ring and / or the outer ring, and that the current conducting elements contact the second sealing washer in an electrically conductive manner. As a result, the distance between the power line elements and the inner ring and / or outer ring, which is electrically connected via the L-shaped sealing washer, can also be reduced.

According to a preferred embodiment of the invention, it can be advantageous that the current conducting elements make electrically conductive contact with the sealing disk configured as contactless in the area of its distal end.

It can furthermore be advantageous for the current conducting elements to make electrically conductive contact with the second sealing washer, which is configured as contactless, in the region of its distal end.

In a further development of the invention, it can also be preferred that the Power line support device have an annular three-dimensional shape.

• - Bereitstellung eines ersten elektrisch leitenden Drahts und eines zweiten elektrisch leitenden Drahts,
• - Positionierung des ersten elektrischen leitenden Drahts als Gerade und des zweiten elektrischen leitenden Drahts als Gerade,
• - Positionierung des ersten elektrischen leitenden Drahts parallel zum zweiten elektrischen leitenden Draht,
• - Positionierung von Stromleitungselementen derart, dass diese abschnittsweise zwischen den parallel angeordneten elektrisch leitenden Drähten angeordnet sind,
• - Verdrillen der elektrisch leitenden Drähte, so dass diese doppelhelixartig umeinanderlaufend angeordnet sind und sich zwischen dem ersten elektrisch leitenden Draht und dem zweiten elektrisch leitenden Draht eine Mehrzahl von Aufnahmetaschen ausbilden, in denen die Stromleitungselemente aufgenommen sind, so dass aus den elektrisch leitenden Drähten eine Stromleitungsträgervorrichtung ausgebildet ist,
• - Formung der Stromleitungsträgervorrichtung in eine ringförmige Raumform,
• - Einsetzen der Stromleitungsträgervorrichtung in einen Innenringeinstich eines Innenrings und/oder in einen Außenringeinstich eines Außenrings, so dass eine stromleitende Verbindung zwischen dem Innenring und dem Außenring hergestellt ist.

The object of the invention is also achieved by a method for producing a roller bearing arrangement comprising the following steps:

• - Provision of a first electrically conductive wire and a second electrically conductive wire,
• Positioning the first electrically conductive wire as a straight line and the second electrically conductive wire as a straight line,
• Positioning the first electrically conductive wire parallel to the second electrically conductive wire,
• - Positioning of power line elements in such a way that they are arranged in sections between the electrically conductive wires arranged in parallel,
• - Twisting the electrically conductive wires so that they are arranged in a double helix around one another and a plurality of receiving pockets are formed between the first electrically conductive wire and the second electrically conductive wire, in which the current conducting elements are accommodated, so that a current conducting carrier device is formed from the electrically conductive wires is trained,
• - Shaping the power line support device into an annular three-dimensional shape,
• Insertion of the power line support device into an inner ring recess of an inner ring and / or into an outer ring recess of an outer ring, so that a current-conducting connection is established between the inner ring and the outer ring.

Figure list

• 1 eine erste Ausführungsform einer erfindungsgemäßen Wälzlageranordnung in einer Querschnittsansicht,
• 2 eine zweite Ausführungsform einer erfindungsgemäßen Wälzlageranordnung in einer Querschnittsansicht,
• 3 eine dritte Ausführungsform einer erfindungsgemäßen Wälzlageranordnung in einer Querschnittsansicht,
• 4 eine vierte Ausführungsform einer erfindungsgemäßen Wälzlageranordnung in einer Querschnittsansicht, und
• 5 Prinzipdarstellungen zur Bildung einer Stromleitungsträgervorrichtung.

The invention is explained in more detail below with reference to drawings without restricting the general inventive concept. The drawings are only of a schematic nature and are used solely for understanding the invention. The same elements are provided with the same reference symbols. The different features of the various exemplary embodiments can also be freely combined with one another within what is technically feasible. Show it:

• 1 a first embodiment of a roller bearing arrangement according to the invention in a cross-sectional view,
• 2 a second embodiment of a roller bearing arrangement according to the invention in a cross-sectional view,
• 3 a third embodiment of a roller bearing arrangement according to the invention in a cross-sectional view,
• 4th a fourth embodiment of a roller bearing arrangement according to the invention in a cross-sectional view, and
• 5 Schematic representations for the formation of a power line support device.

Detailed description of the drawings

The 1 shows a first embodiment of a roller bearing arrangement 1 , comprising a roller bearing 2 with an inner ring 3 , an outer ring 4th and rolling elements 5 . The inner ring 3 has an inner ring raceway 6th on and the outer ring 4th an outer ring raceway 7th , the rolling elements 5 between inner ring 3 and outer ring 4th are mounted rolling and on the inner ring raceway 6th and the outer ring raceway 7th roll off. The inner ring 3 has an inner ring groove 8th and the outer ring 4th an outer ring groove 9 . In the inner ring groove 8th is a power line support device 10 is recorded on which power line elements 11 are arranged and configured so that an electrically conductive connection between the inner ring 3 and the outer ring 4th is made. In the first embodiment of the invention shown, this current-conducting connection is produced in that the outer ring 4th an outer ring groove 9 has, in which a non-contact sealing washer 15th is fixed, which is essentially in the radial direction between the inner ring 3 and outer ring 4th extends, but does not contact the inner ring, wherein the power conduction elements 11 the sealing washer 15th make electrically conductive contact in the area of their distal, radially inner end.

The sealing washer 15th has a ring segment-like section at its radially outer end, which groove into the correspondingly shaped outer ring 9 is fitted.

The power line support device 10 has a circular three-dimensional shape and is located in the inner ring recess, which is designed as a circumferential groove 8th fitted. One possible configuration of the power line support device is illustrated in FIG 5 explained in more detail.

The 2 shows a second possible embodiment of the roller bearing arrangement according to the invention 1 , comprising a roller bearing 2 with an inner ring 3 , an outer ring 4th and rolling elements 5 , the inner ring 3 an inner ring raceway 6th has and the outer ring 4th an outer ring raceway 7th having. The rolling elements 5 are between the inner ring 3 and outer ring 4th bearing and rolling on the inner ring raceway 6th and the Outer ring raceway 7th from. The outer ring 4th has an outer ring recess 9 in which a power line support device 10 is recorded. In the in 2 The embodiment shown is the power line support device 10 in or on the sealing washer 15th arranged, which in turn in the outer ring recess 9 is fixed. The power line elements 11 the power line support device 10 are arranged and configured so that a conductive connection between the inner ring 3 and the outer ring 4th by means of the power line elements 11 and the power line support device 10 over the sealing washer 15th and the second sealing washer 16 is made.

The second sealing washer 16 is L-shaped and attached to the inner ring 3 fixed. The power line elements 11 contact the second sealing washer 16 electrically conductive. As a result, in addition to the electrical contact, an additional labyrinth-like seal against the ingress of undesired dirt particles is created. The power line elements 10 in particular form a brush plane that is closed in the circumferential direction.

The power line elements 11 contact the second sealing washer configured as contactless 16 electrically conductive in the area of their distal, radially outer end.

The 3 shows a third possible embodiment of a roller bearing arrangement 1 , comprising a roller bearing 2 with an inner ring 3 , an outer ring 4th and rolling elements 5 , the inner ring 3 an inner ring raceway 6th has and the outer ring 4th an outer ring raceway 7th having. The rolling elements 5 are between the inner ring 3 and outer ring 4th bearing and rolling on the inner ring raceway 6th and the outer ring raceway 7th from. The outer ring 4th has an outer ring recess 9 on the one above the sealing washer 15th the power line support device 10 is recorded. The power line support device 10 is on the non-contact sealing washer 15th arranged, which in turn in the outer ring recess 9 is fitted. The power line elements 11 are arranged and configured in such a way that there is a conductive connection to the inner ring 3 manufacture by the power conduction elements 11 make direct electrical contact with the inner ring.

The 4th finally shows a fourth possible embodiment of a roller bearing arrangement 1 , comprising a roller bearing 2 with an inner ring 3 , an outer ring 4th and rolling elements 5 , the inner ring 3 an inner ring raceway 6th has and the outer ring 4th an outer ring raceway 7th having, the rolling elements 5 between inner ring 3 and outer ring 4th rolling on the inner ring raceway 6th and the outer ring raceway 7th roll off. The outer ring 4th has an outer ring recess in this embodiment 9 in which a power line support device 10 is recorded on which power line elements 11 are arranged and configured so that a current-conducting connection to the inner ring 3 is made by the power conduction elements 11 the inner ring 3 contact directly electrically conductive.

The 5 shows a possible, preferred embodiment of a power line support device 10 . The power line support device shown 10 has a first electrically conductive wire 12th and a second electrically conductive wire 13th , which are arranged in a double helix around one another, so that between the first electrically conductive wire 12th and the second electrically conductive wire 13th a plurality of receiving pockets 14th form in which the power line elements 11 are included, which is particularly good in the middle representation in the 5 reveals. The power line elements 11 can be designed as electrically conductive fleece, copper wire and / or grinding brushes.

As in the images below of the 5 can be seen, the power line support device 10 preferably have a circular three-dimensional shape. The power line elements 11 pointing radially inwards (figure below right), for example in an outer ring 4th to be added or radially outwards (picture below left), for example in an inner ring 3 to be included.

• - Bereitstellung eines ersten elektrisch leitenden Drahts (12) und eines zweiten elektrisch leitenden Drahts (13),
• - Positionierung des ersten elektrischen leitenden Drahts (12) als Gerade und des zweiten elektrischen leitenden Drahts (13) als Gerade (obere Abbildung in 5),
• - Positionierung des ersten elektrischen leitenden Drahts (12) parallel zum zweiten elektrischen leitenden Draht (13) (obere Abbildung in 5),
• - Positionierung von Stromleitungselementen (11) derart, dass diese abschnittsweise zwischen den parallel angeordneten elektrisch leitenden Drähten (12,13) angeordnet sind (obere Abbildung in 5),
• - Verdrillen der elektrisch leitenden Drähte (12,13), so dass diese doppelhelixartig umeinanderlaufend angeordnet sind und sich zwischen dem ersten elektrisch leitenden Draht (12) und dem zweiten elektrisch leitenden Draht (13) eine Mehrzahl von Aufnahmetaschen (14) ausbilden, in denen die Stromleitungselemente (11) aufgenommen sind, so dass aus den elektrisch leitenden Drähten (12,13) eine Stromleitungsträgervorrichtung (10) ausgebildet ist (mittlere Abbildung in 5),
• - Formung der Stromleitungsträgervorrichtung (10) in eine ringförmige Raumform (untere Abbildungen in 5),
• - Einsetzen der Stromleitungsträgervorrichtung (10) in einen Innenringeinstich (8) eines Innenrings (3) und/oder in einen Außenringeinstich (9) eines Außenrings (4), so dass eine stromleitende Verbindung zwischen dem Innenring (3) und dem Außenring (4) hergestellt ist (1-4).

These configurations can be made as follows:

• - Provision of a first electrically conductive wire ( 12th ) and a second electrically conductive wire ( 13th ),
• - Positioning the first electrical conductive wire ( 12th ) as a straight line and the second electrical conductive wire ( 13th ) as a straight line (top figure in 5 ),
• - Positioning the first electrical conductive wire ( 12th ) parallel to the second electrically conductive wire ( 13th ) (upper figure in 5 ),
• - Positioning of power line elements ( 11 ) in such a way that they are in sections between the electrically conductive wires ( 12th , 13th ) are arranged (top figure in 5 ),
• - twisting the electrically conductive wires ( 12th , 13th ), so that these are arranged around one another like a double helix and are located between the first electrically conductive wire ( 12th ) and the second electrically conductive wire ( 13th ) a plurality of receiving pockets ( 14th ) in which the power line elements ( 11 ) are included, so that from the electrically conductive wires ( 12th , 13th ) a power line support device ( 10 ) (middle figure in 5 ),
• - Forming the power line support device ( 10 ) into a ring-shaped three-dimensional shape (lower figures in 5 ),
• - Insertion of the power line support device ( 10 ) into an inner ring groove ( 8th ) an inner ring ( 3 ) and / or in an outer ring groove ( 9 ) of an outer ring ( 4th ), so that a conductive connection between the inner ring ( 3 ) and the outer ring ( 4th ) is made ( 1-4 ).

The invention is not limited to the embodiments shown in the figures. The above description is therefore not to be regarded as restrictive, but rather as explanatory. The following patent claims are to be understood in such a way that a named feature is present in at least one embodiment of the invention. This does not exclude the presence of further features. If the patent claims and the above description define “first” and “second” features, this designation serves to distinguish between two similar features without defining an order of precedence.

List of reference symbols

1

Roller bearing arrangement

2

roller bearing

3

Inner ring

4th

Outer ring

5

Rolling elements

6th

Inner ring raceway

7th

Outer ring raceway

8th

Inner ring recess

9

Outer ring recess

10

Power line support device

11

Power line elements

12th

first electrically conductive wire

13th

second electrically conductive wire

14th

Receiving pockets

15th

Sealing washer

16

second sealing washer

Claims (10)

Rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4) and rolling elements (5), the inner ring (3) having an inner ring raceway (6) and the outer ring (4) an outer ring raceway ( 7), the rolling elements (5) rolling between the inner ring (3) and the outer ring (4) in a rolling manner on the inner ring raceway (6) and the outer ring raceway (7), characterized in that the inner ring (3) has an inner ring recess (8) and / or the outer ring (4) has at least one outer ring recess (9) in and / or on which a power line carrier device (10) is received, on which power line elements (11) are arranged and configured in such a way that an electrically conductive connection between the inner ring ( 3) and the outer ring (4) is made. Rolling bearing arrangement (1), according to Claim 1 , characterized in that the power line support device (10) comprises a first electrically conductive wire (12) and a second electrically conductive wire (13), which are arranged in a double helix around one another, so that between the first electrically conductive wire (12) and the second electrically conductive wire (13) form a plurality of receiving pockets (14) in which the current conducting elements (11) are received. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the current conducting elements (11) are designed as electrically conductive fleece, copper wire and / or grinding brushes. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the inner ring (3) has an inner ring recess (8) and / or the outer ring (4) has an outer ring recess (9), in and / or on which a sealing washer (15 ) is fixed, which extends essentially in the radial direction between the inner ring (3) and the outer ring (4), wherein the current conducting elements (11) contact the sealing washer (15) in an electrically conductive manner. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the power line carrier device (10) is arranged in and / or on the sealing washer (15) which is fixed in the inner ring recess (8) and / or the outer ring recess (9) . Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the rolling bearing (2) has an L-shaped second sealing washer (16) which is fixed to the inner ring (3) and / or the outer ring (4), and the current conducting elements (11) make electrically conductive contact with the second sealing washer (16). Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the power conduction elements (11) make electrically conductive contact with the sealing washer (15) configured as contactless in the area of its distal end. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the current conducting elements (11) make electrically conductive contact with the second sealing disk (16) configured as contactless in the region of its distal end. Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the power line support device (10) have an annular three-dimensional shape. Method for producing a roller bearing arrangement (1), in particular a roller bearing arrangement (1) according to one of the Claims 1 to 9 , comprising the following steps: - providing a first electrically conductive wire (12) and a second electrically conductive wire (13), - positioning the first electrically conductive wire (12) as a straight line and the second electrically conductive wire (13) as a straight line - Positioning of the first electrically conductive wire (12) parallel to the second electrically conductive wire (13) - positioning of current conducting elements (11) in such a way that these are arranged in sections between the electrically conductive wires (12, 13) arranged in parallel, - twisting the electrically conductive Wires (12, 13), so that they are arranged around one another in the manner of a double helix and a plurality of receiving pockets (14) are formed between the first electrically conductive wire (12) and the second electrically conductive wire (13), in which the current conducting elements (11) are received, so that from the electrically conductive wires (12, 13) a power line carrier device - Shaping the power line support device (10) into an annular three-dimensional shape, - Insertion of the power line support device (10) into an inner ring recess (8) of an inner ring (3) and / or into an outer ring recess (9) of an outer ring (4 ), so that an electrically conductive connection is established between the inner ring (3) and the outer ring (4).

Images