EP2929201A2

EP2929201A2 - Bearing, more particularly antifriction bearing

Info

Publication number: EP2929201A2
Application number: EP13824105.4A
Authority: EP
Inventors: Thomas Rink
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2012-12-10
Filing date: 2013-11-07
Publication date: 2015-10-14
Also published as: CN104838161A; DE102012222631A1; WO2014090236A3; US20150316094A1; WO2014090236A2

Abstract

The invention relates to a bearing, more particularly to an antifriction bearing having a first bearing ring (1), a second bearing ring (2), and a claw pole arrangement (13), wherein the claw pole arrangement (3) comprises a first claw ring (4) with a sequence from the first claw (5) and a second claw ring (6), integrated in the peripheral direction of the axis of rotation, with a sequence from the second claw, wherein the claw rings (4, 8) are arranged on the first claw ring (1), wherein the claw (5) of the two claw rings (4, 6) form magnetic circuits with a sequence of magnetic poles (8) surrounding the axis of rotation, and wherein the magnetic poles (8) are arranged on the second bearing (3). The problem of specifying a bearing, more particularly an anti-friction bearing, having a detection device for bearing forces which is structurally easy to integrate, is solved according to the invention by a gap (10) being formed in a peripheral direction at least in some sections between the first claw ring (4) and the second claw ring (6), wherein beyond the gap (10), the magnetic circuit is closed between a claw (5) of the first claw ring (4) and a claw of the second claw ring (6) adjacent in a peripheral direction, and by a magnetic sensor (11) being arranged in the region of the gap (10) to record the magnetic field that pushes through the gap (10).

Description

Bex ^ eh ifig _. the .EiHmiung

Bearings, in particular rolling bearings

The invention relates! in bearings, in particular: Rolling bearings, according to the claim of the claim,

In stock, especially f rolling bearings, wfk In operation: various forces, especially the same, d e iri radial direction, e ogen on the axis of rotation of the lagar, act and asoe change the Ahständes between: the cause both Lagerrlogen. Pia qualitative or even quantitative detection of derer- exager bearing forces hz, c_gr.fed ü¬ ng the particular radial distance from both bearing rings to each other is expensive, but important for the design and monitoring of the camp.

For example, it is known to apply strain gauges to the end face or lateral surface of a bearing ring, which provide an electrical signal under the forces exerted by forces on the strain gauges. Such strainers allow you to attach our elaborate and highly reproducible, further an additional power supply is required.

From the state of the echno are bearings, losbesondere bearings: known, which include a Kiauenpolgenerator, is provided for generating electrical energy from the relative rotational movement of both Lagarringe Is, in particular Lagar are known, speiall bearings, comprising a first bearing ring, a second bearing ring , and a saloon pole assembly, wherein the claw pole assemblies have a first claw ring with a sequence of first jaws and an inner circumferential extent of the axis of rotation offset second Kiauenring mi with a sweep of second claws comprises wherein the Kimm of the two Klauennnge mt of a rotational axis Umlayfanden sequence of magnetic poles magnetic circles form. Here are the; two claw rings arranged on the first Lagerrinf and the Abfeige 5 of the magnetic poles attached to the second bearing ring. The front-plane Klayenpolanordnung is completed by an induction coil - a lauenpolgenerafor with the induction coil is placed between the two Klauhngen Ist and the axis of rotation rotates such that upon a relative rotation of the first bearing ring and the second Lagererte) around the induction coil of magnetic circuits is circulated Orientation sieh depending on the speed of the bearing changes, se that induces in the induction coil an electrically Weehselspannung wi d, which can be tapped as useful energy and the frequency of which depends on the speed of the bearing so that a Kiauenpolgenerator indirectly 15 may be provided as: speed sensor can. The substantial complete closure of the magnetic coil surrounding the induction coil for the operation of the Laeenpolgenerators is rare on the magnetic poles on the second bearing ring either by a magnetic K ickschlusshng connecting in Umfangsriohtyng magnetic poles magnetically conductive or you c Magnetically conductive body of the second bearing ring causes the essential for the functioning of the Klauenpölgeneraters complete Schiieiung of: the induction coil encircling magnetic circuit Au sides Klauenbleehe on the first bearing ring by the two Kiauenhieche 5 directly magnetically conductive connecting Usteltelement (DE 10 2011 075 548 A1 ) or by the magnetically conductive body of the first bearing ring (DE 0 2010 018472 AI) causes changes in the distance between the two bearings, the change in the magnetic flux between the magnetic poles on the second bearing ring To make the claws on the first bearing ring noticeable, can not be readily detected in the Klayen extended to a kiauenpolgenerator c, since the induction voltage in the induction coil over the entire Scope averages

Object of the invention

It is the object of the invention to provide a bearing, in particular a roller bearing, with a housing device which can be easily integrated into a housing for locating persons

To m menu assu rsg the invention

This gave is achieved efindungsgemiE, da.ss In ümfangsrieb ^"catch at least partially a gap between the first ring gear and the second ring gear _formed: wherein across the gap z ica e a claw of the first claw ring and an in Urafangsrlehtung adjacent claw of the second Claw ring of the magnetic circuit is closed, and that in the region of the gap, a magnetic sensor is arranged, which detects the magnetic field passing through the gap

The magnetic gap formed by the cleavage of the claw of the first claw at the cleavage point, which is formed at least in sections, is a magnetic flux, that of the opposing magnetic pole and of the abscissa this claw adjacent clans of the second clan ring to that of this adjacent claw opposite, unlike magnetic Fol dependent, therefore, so from the distance between the two t.agerringe _: s that de of the magnetic sensor in the defined? Gap between the two Kiauenrlngen detected magnetic field of the distance between the two bearing rings to each other and thus indirectly depending on the forces acting on the bearing in Lirnfangsberelch the gap forces The gap Mm extend in the circumferential section of the bearing only by the amount over which the magnetic flux passes through the two excellent metric adjacent claws of the lauenpaam- it being understood that a plurality of such excellent claw pairs may be provided in the circumferential direction But the gap can also extend along the entire circumference of the bearing.

The gap width, ie the smallest distance between the two plates, is designed so that a magnetic flux is prevented by a physical, magnetically conductive part between the two Klauenhleehen, but also so that over the gap across the magnetic circuit are closed can, as the magnetic Flyssdiohte exits from one of Klauenbieche near its surface in the direction of the other jawbiech out while passing through the gap

It is preferably provided that the gap is formed al air gap, wherein in the Luitspalt particularly simple and easily accessible, a magnetic sensor can be arranged.

It is preferably provided that the gap is filled with a magnetically non-conductive material, in particular with a plastic. The magnetic sense can then be replaced by the magnetically nonconductive F ir Ira Fe dal a ng i.

Preferably, it is provided that an insulation of a magnetically non-conductive material, in particular of a plastic, is arranged between the claw rings and the first bearing ring. The insulation ring suppresses stray magnetic fluxes which do not run through the gap with the magnetic sensor.

With regard to the insulation length, it is particularly preferred in particular for the claw rings to receive the insulation finger at recesses & ϊηύ, and that the isolaiionsrlng at least in sections, the gap SEWI-see the uwtsgf * fills. The Isofatlon ring satisfies the other function of holding the hollow lug, providing at least in part the magnetically non-conductive material which fills the gap between the two lances

Preferably, it is provided that the magnetic sensor is arranged on or in the insulation fi ring. The isolatlon ridge thus fulfills the further puncture of receiving the magnetic sensor and, in particular, of recording the electrical wiring thereof in sections.

Vorzugswelse It is envisaged that the two claw rings surround an axis surrounding the axis of rotation induction coil »wherein the magnetic circuits rotate around the induction coil. The induced in the induction coil eiekt-S rlsche voltage can be provided as a power supply of the at least one magnetic sensor in the at least one gap. The influence of the magnetic field detected by the magnetic sensor in the gap by the frequency-dependent magnetic leakage surrounding the inductor can be eliminated, for example, by electronically postprocessing the signal of the magnetic sensor, specifically by applying an output to the inductance coil's delta-voltage signal.

Alternatively, it is preferably provided that the magnetic San- ¬ special is subjected to an external Spannungsgneile,

Alternatively, it can be provided that the magnetic sensor is acted upon by an energizer charged by the induction coil,

0

De, the magnetic field in the gap detected magnetic sensor can hei be ^"splels else designed as a Hall sensor Eder as X R-sensor. WA ^'re Vorteil® and erkma e nd of Erf urrg ei gn lc from the s§bh§? V glgen claims and from the Customized resböog a Äusfuhrungsbelspteis, The invention is described in more detail below with reference to the unte berthing Zelednyngen and explains

t a Watch! t urs§ | the figures

Flg, Figure 1 shows a plan view of a Äusföhrungsheispiel a ertin ^"dungsgerna en & bearing,

FIG. 2 shows, by way of example, a partially sectioned view of the one shown in FIG. 1 illustrated Ausföl tion heispleis, along the

Section line A ~ A of Fig., And

Flg, 3 shows aussehnittsweis a partially cut Ansieh of in Flg. 1 and Flg. 2, along the section B-B of Flg. 1 ,

Detailed Sesehreifouog of the figures

Fig. 1 shows a plan view of a single-row ball bearing, in particular as a rolling bearing, trained bearing, comprising a first, inner bearing ring 1, a second, inner bearing ring 2 and; an arranged between the bearing rings n 2 lauenpolanordnung 3 _S. between the two insert rings i _s 2 is arranged close Flg, 2 Figure 3 shows the Klauenpolanordnung In a first Sc niriansiehL blows the Klayenpolanordnung 3 a first Klauennng 4 with a sequence of first jaws, whose only visible with the claw Bezy szelehan Is, and a fn U runningrichfung the axis of rotation of the bearing offset second Ktauenring 6 with a sequence of far n claws unv fas i, the claws of the second Klauenriug 8: are arranged above hw, below the Papateben. In this case, the neide claw fingers 4, 6 arranged on the first bearing ring 1 rotatable oils claw ring $ are each as: flat Ringseheiben: trained, they radial, with respect to the axis of rotation of the L like extending, with claws respectively as axial, ie parallel to the axis of rotation of the bearing sic extending portions of the claw rings 4 _> 8 auegebildet are. The first jaw 6 of the first jaw ring 4 is in the direction of the bearing interior, pointing to a Wilzkörpe 7, turned off in Fig, 2, not pictorially illustrated claws of iauen Kfauenrin s 6 are also axially away from the rolling elements 7 turned off The the claw 5 of the first ring Kiauenrings 4 in ümfangsrioh- direction adjacent claw of the other, second KfauenHfigs 8 is shown in Fig. 3 m in a side view and there provided with the Beeygsxelchen, 18 '

On the second bearing ring 2, a rotational axis of the tag rotating sequence of magnetic poles is arranged, wherein the illustrated first magnetic pole 8 of the claw 5 of the first Klauennngs 4 while maintaining a Lagerspaites 9 gegenüberiiegl and a second, to the first magnetic pole 8 unlike names Pole below the Raplerehene there also located claw of the second jaw ring 8 opposite. Between your two Kiauenhngen 4 6, ndkanisn at their catfish each end on the first bearing ring 1 J ^, is a gap 10 formed _* represents sieve sections ,, in the range of the claw 5 of the first Kiauenrings 4 and of cooperating with the claw 5 claw of the second Claw ring &, extending in Umiangsriobtung the camp

It is envisaged _that: before starting) ^'the magnetic pole 8 (e.g., a north pole) on the claw 5, the first Kiauenrfng 4 _S by the gap 10 through the i-wide Klsuenh ^'ng 6 and the u ter the paper plane located further the claw 5 In Umfangsrlelilyng adjacent claw second ds & iauenrings the also located the magnetic pole 8 of the paper plane in yrnfangsnchf ^y ng notify hard unlike (in this case a South Pole) forming magnetic circuit is formed

In its axial spacing, the gap 10 is attached to the two flat claw rings 6 se, closing the gap 10 between a claw S of the first claw limb 4 and a claw of the claw ring 6 adjacent to one another in the circumferential direction becomes. The gap 10 is formed by the defined omission, a physical, magnetic leitfahigsn connection between the two Kleyenhngen 4, 6,

In the area of the gap 10, a magnetic sensor 11 is arranged, which detects the magnetic field that ends the gap, wherein the magnetic sensor 11 is designed as a HalhSensoi, that of the magnetic sensor 11 in the region of the gap 0 between the two lauenhn en 4, 6 detected magnetic field depends essentially on the amount of the radial extent of the bearing gap 9, that is the distance de claw 5 to the magnetic pole 8 and van dorn distance of the claw Benaehhartan claw in the circumferential direction jig ig, 3} the am whose second Kiauenrings 6 to the magnetic Po! 8 in the circumference adjacent to the pole 8 unlike magnetic pole and is thus a Mali for the width of the Lagarspaltes 9 In radial Nuance, based on the axis of rotation of the Legers, and thus indirectly .for the acting in the radial Rlchtyng bearing collar , which influences the radial distance of the bearing rings 1 2

For the gap 10 between the two Kleyenbleehen 4, 6 is provided. tes the gap 1 (^ reload sections, ayf the welsenden to the Kleyen δ, radially inside-laying side is formed as tyftspait so that the Klauenbfeeia 4, 6 near the claws 5 durdi air, are separated as a magnetic non-conducting aterial,

For one of the claws 8, towards the first bearing ring 1 point out section of the gap 10 is provided, that the gap 10 in this section with a magnetically non-lelfenden material, nc nc a magnetison not-leltendern plastic, is filled

Discontent the two Klanenrlngen 4. 6 ^" and the first Lagerhng 1 närnlieh an isolation ring 12 from a rnsehefseh rvieht-Lelting material, nirnlloh from the Kynststoff arranged, the de isotation ring 12 projects into the gap 10 in sections and there the gap 10 with the magnetic non-conductive plastic fills

The insulating ring 12 holds the two edge jaws of the claw rings 4, 6 whirling on the first bearing ring 1 away from the magnetically conductive material: of the first bearing ring 1 and ensures that no parasitic magnetic flux passing the magnetic sensor 1 is present above the first bearing ring 1 Occurring by means of an oiling finger 1 is received in a recess 13 on a longitudinal surface 14 of the first bearing ring 1, with the adjoining end surface 14 in front of it, and see the inner circumferential surface of the first ring 1 facing the second bearing ring 2 radially so far, that a contact _: between the two Kiauenringen 4, 8 with the material of the first bearing ring 1 ynterhunden Is, the Klauenrlnge, 6 Recesses 16, 17 (Fig. 3) of the insulating ring 12 are accommodated, but the welder is shown to see that the isoplane 12 intersperses the spout 10 between the cage rings 4, 8 a & isfiill Dia recesses 16, 17 are formed as flat, freestanding grooves in the material of the isoistlone ring 12. In the flat edge distance of 6 sections isuendnge 4 ^'flush with the angferssef lefi Öherfiaohe of scim added eod isolationsnngs 12 ahscrili t

It is further provided that the magnetic .Sensor 11 is disposed on a pointing on the z eite bearing ring 2 Ka te of Isoiationsrings 12, between the heather rings 4, $ in the gap 10, wherein in the iso * latlcmsring 12 electrical lines: Supply of the magnetic sensor 11 are arranged _*

Except for the in the gap 10 between the iauenringe 4, 8 in sections riinelereichenden insulating ring 12 Ist; the area between the Kiauenrir- Gen _4: S free of a Föflrnaterfaf and insOecöndere as tyftepal having formed in a modification of the Äusfuhrungsheispiete shown could still be a induction coil between the Klauenringa 4, be inserted 6, with a rcagnetlaeh nonconductive Spulenmatehal such as copper.

first bearing ring

two r bearing ring

Kisaenpofa north

first Klauennng

Claw of the first cage 4 Second cage wire Magnetic pole

Lagerspait

gap

magnetic sensor

ΐ ^, > i "H

Acceptance ü

End face of the first bearing ring. 1

A. u neb uo

Except og

Claw of the second claw ring 6

Claims

Fatentan prow ^; lia

Bearings, in particular älzlager, comprising

a first bearing ring (1,

a second bearing ring (2), and

a claw pela erd tight (3),

said claw potion (3) comprising a first cleat (4) having a succession of first claws (6) and a second claw ring (6) offset in the direction of rotation of the rotation axis and having a contour of second claws

wherein the claw rings (4 _f 8} are arranged on the first bearing ring (1),

wherein the claws {§} of the two coil rings (4, 8) form magnetic circuits with a sequence of magnetic poles (8) rotating around the rotation axis.

the magnetic poles (8) being arranged on the second day ring (3),

characterized,

that in Umförigsricministen "- a sc l tswels a gap (10) between the first claw ring (4) and the second. Claw ring (S) is formed, wherein over the gap (10) between a claw (S) of the first claw ring (4) and a claw of the second Klennenngs (6) adjacent in Umfongsiiehtyng the magnetic circle is geseniossen, and

in that a magnetic sensor (11) is disposed in the region of the gap (1), which detects the magnetic field passing through the gap (1)

Bearing according to Claim 1, characterized in that the gap (10) is designed as a lof gap, characterized Bearing according to claim 1, characterized in that the spall (10) is filled with a magnetically Bte Nefierterta teriaL iaahesendere ml & lm plastic,

Bearing according to one of Claims 1 is 3 _S characterized gekennzelohaet that wisc n the claw rings _(4;: §} YND the first bearing ring (1) is an iso- iationsring (12) of a magnetically non-conductive material, in particular from a plastic, is arranged

Bearing according to claim 4,

(4, 6) are received on recesses (16, 1 ') of the fsalate looper ring (12), and that the isolaiion rhin {12} at least partially discharges the gap (10) between the ring ridges (4, 6)

Bearing ac claim 4 or S \ characterized in that the magnetic sensor (11) is arranged at barely in dam: Isolalionsring (12),

Bearing according to one of claims 1 to 6 _< characterized in that the two iauenhnge a rotary axis circulating induction coil circumvent, wooei the magnetic Krei e umtaufen the induction coil ..

Bearing according to claim 7, characterized in that the agnetisc e sensor is beaufsehiagt by an energy storage, which is charged by the induction pulse.