WO2015035987A1

WO2015035987A1 - Cage for a rolling bearing and associated rolling bearing

Info

Publication number: WO2015035987A1
Application number: PCT/DE2014/200346
Authority: WO
Inventors: Jörg NEUKIRCHNER; Christoph Meder
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2013-09-12
Filing date: 2014-07-23
Publication date: 2015-03-19
Also published as: DE102013218286A1

Abstract

The invention relates to a cage (1) for a rolling bearing, said cage comprising a main member (2) made of a first material as well as contact elements (3) made of a second material, the contact elements being arranged at friction or impact-loaded points of the main member.

Description

i

C igure of inventions Cage for a rolling bearing and rolling stock bearings

The invention relates to a cage for a roller bearing,

Background of the invention

Rolling bearing cages must withstand high local contact stresses and compressive stresses during operation. During operation, contact closure may therefore occur in the form of severe wear. Likewise, overloads can cause plastic deformation of the cage.

Cages for bearings are often made of a cost-effective material as a plastic material! Such materials are sufficient: in normal conditions, at high stress locations where high local contact stresses occur, there is a risk of occurrence of excessive wear and plastic deformation, which may result in P nk functions and failures,

From DE 102 40 825 A1 a cage for a roller bearing is known, which consists of several in U fängrichfyng juxtaposed segments, Such segments can have a considerable amount, for example, if the rolling bearing is part, .einer Rotoriagerung a wind turbine, see it! then the Gefah _s VersohlelS that at points of contact between adjacent _segments. optionally, also between a rolling element and a segment, auifrii, in particular if the kifi consists of a conventional plastic material, From US Pat. No. 3,998,191, it is known in rolling bearings with a cage that has pockets which are filled with a solid lubricant. This solid lubricant is used to lubricate the Wikkörper.

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De invention is the object of specifying a cage for a rolling bearing, which can endure a high surface pressure and cost: 0 can be produced

To solve this problem is provided in a cage of the initially mentioned type erflndungsgem S that he has a base body made of a first material and from a: made of material Kontaktelernente5 which are arranged on friction or StoShasteten stalls the Srundkörners.

The invention is based on the idea of using a cage made of materials m. A basic body consists of the first, cost-effective material. At critical points, in particular at contact points where friction occurs or at which impact and Kontakfkräffe act, the body is provided with contact elements, which are made of a second material. This second material is designed to high surface pressures and; Contact forces and bumps to endure. Accordingly, the second material consists of a mechanically high-quality material, whereas a cost-effective material can be used for the first material used to produce the basic body. Keste can thus be saved in the production of the cage according to the invention by using a high-quality material only where it is absolutely necessary.

It is inventively preferred that the second material is a metal or a metal alloy, in particular a steel alloy or ceramic or a fibrous material or a composite pas- senger, these materials are mechanically durable and can withstand the high daily fatigue and high cmfactivity and fatigue in the daytime

Preferably, the first material which benefits from the GryrK rpör of the inventive cage is a plastic material. For example, a polyamide {PA) can be used as the plastic material, eg, B, PA 88. Alternatively, Palyamldimide {PA!} Can be used as ifgwerkstof be used,

Hinbliak on the production of erfindungsgemäSen cage e can be provided that the existing of the first material body with de from the. second-. it off -herges ellten ^{'ontaklelementen} is umsphfet or that di Kentakielemante elngepresst or are glued or gekllpst or versehrauht .. Preferably de erundkdrpe of the cage is made of injection molding Durah CSrundkerper is then verseben with those produced on the second material Kontakteiementen, Ais joining method is it Preferably ,, that the separately prepared Kontaktela nenten be overmolded, whereby the ementen with the contact elements vervicken Gfy-nc kpe fpei 'is formed. Alternatively, the previously mentioned tensioning methods such as press-fitting, gluing, clipping or strapping can be considered.

It is aueb within the scope of the invention that the Kontakteiemente are selectively mounted on the body and protrude from a Oberfiicbe of the body, Dadareh sie sie the advantage that only the Kontaki- elements ^{' of} the cage a Wälzkörpe or a mä object, such as another cage segment or an inner ring or an outer ring of the roller bearing, whereas there is no contact with the main body. This ensures that the base body can be used virtually free of deformation, moreover, the Konfakteieemenfe are largely versed letSresisteni since they are made of the second material, which is able to end Oberfiäobenpressnngen. A variant of the invention may provide that a Korriktetenient is annular and surrounds a Ausnahniüng or Tasc e for a äfzkörper, In this embodiment, by the annular Kenta teiement wear durc contact wipe the cage and a rolling element vermie-- the.

In another variant of the cage according to the invention, a contact e! be designed as an annular Äniaufrsn and be arranged on one or both Äxiai- rare the Käfiga. At the Äxialseiten of the cage, this gege enenfatis an outer ring or an inner ring of the rolling contact camp. In order to prevent wear or piasis deformation on these stiffeners, on one side or on both opposing ropes of the cage, there may be an annular Anlanfring as a Konfaktelemenf, which is able to shock and Kontekktkräfte of a board of ÄuEen ^» or inner ring take.

The cage according to the invention is particularly well-suited for a body which has a plurality of cage segments arranged side by side in a doorway, with a cage between adjacent cage segments comprising at least one eyelid. In this way it is possible to ensure wear minimizing the size of the segments, and thus maintaining the film's inherent properties, Overall, this can extend the life of the device,

Next to it! the invention comprises a roller bearing comprising an inner ring, an outer ring and intervening therebetween in recesses or recesses of a cage on a rolling body. The rolling bearing according to the invention is distinguished in that it comprises a cage of the type described, Aysföbrörigsbeis te of the invention are mdn ZeleNw s§ @ n. and we describe the following in more detail. Show it; a detail of a cage according to the invention, which touches a bed of the body, in a sectional view;

FIG. 2 is a detail of another embodiment of a compliant cage;

Figure 3 is a further Ausführungshelsplei a erfindungsgeniä cen her cage a Wäl warehouse; and FIG. 4 shows a further embodiment of a cage according to the invention for a roller bearing.

FIG. 1 shows a detail of a cage 1 for a roller bearing in a sectional view. The cage has a main body 2 _: which is made of a first material and of a second material made of a second material 3 _; which are arranged at friction or stoSioelasteten points of the body. In Figure 1 it can be seen that the contact element 3 is arranged at a contact point between the Kifig 1 and a rolling element 4. At this point, considerable fi xing pressures can occur, which normally result in a reduction in the life of the cage. In the illustrated embodiment, the base body 2 is made of a plastic material, namely PA 68. The contact elements 3 are made of steel, accordingly the contactaleniae 3 are capable of the contact forces and the surface compression between the rolling element 4 and the cylindrical element 3 absorb without noticeable VerschielS occurs. δ

The basic body is manufactured in the extrusion molding process after the contacts 3 which have reached the steel have been welded. Since the use of the comparatively expensive Koniaktelernefe 3 on the hoch el steten areas of the cage 1 bershrankt, the K! Fig 1 can be manufactured comparatively inexpensive,

FIG. 2 shows a second embodiment of a cage 5 for a rolling bearing. O cage β comprises a plurality of cage segments 7 arranged in the circumferential direction next to one another, between which pockets 8 are formed, in which rolling elements 9 are accommodated. When operating the rolling bearing, the calf segments, 6,? Both the wicks 9 and adjacent wafers _6f 7 to counteract displacement and any plastic deformations which may occur, the cage segments 8, 7 have contact belts 10, which also in the area of the pockets 8 ice also touch parts 11. see adjacent cage neighbors 6, 7 are arranged. In the illustrated embodiment, the contact elements 10 are designed such that they protrude from the surface of the main body of the contact segments B, 7. The acutance rims 10 may be glued or keyed onto the cage segments 8, 7 or d may be spaced, but the exact manner of attachment: is not shown in detail in FIG. The cage segments 7, which together make up the cage 5, are made of a Kynststoffmaferial as the first material. The Kontakfelemente 10 are made of a ceramic material as a second material, Figure 3 shows a third Äysföhrungsbeispiel a cage 1t, which is a Ganzteliigen Kygelkafig. The cage 12 is used for a Dentailaaer. In the exemplary embodiment illustrated, the adhesive 12 comprises, in addition to a main body 13, substantially annular contact elements 14, wherein a contact element 1 surrounds a recess 15 in which a cylindrical body 1§ is received. The Kontakfeiemente 1.4 cause the rolling elements 16 st tig touch the Konfakteiement 1.4, but not from a unsfstoffniatenal produced Grur Dkorper 13, This ensures that the shape of the cage 12 is maintained, thereby plastic deformations that could impair the function of the dentist. In accordance with the foregoing Ausführungsheispielen the cage 12 can be produced relatively inexpensively by a maferiai berge rigid stiffener 13 is combined with a high quality second material such as steel or ceramic with the high-quality material single borrowed punctiform and bsfastungsgereeht used at those locations becomes where w is actually needed. FIG. 4 shows a further exemplary embodiment of a cage 17 for a roller bearing 20, which is shown in a side view. In FIG. 1, an inner ring 18 of the rolling layer is shown _. 20 shows a track for carcasses 1§ au ^ fweisi For the sake of a better overview, the outer ring of the rolling bearing .20 is not shown.

To guide the Wilzkörper Ii de cage 17, consisting of a base body 2i of a first material and designed as a starting fingers Confaktelementen 22, _· are made of a second material. The two Konfakieientente 22 are al Änlaufringe formed untersc iedil- cbem diameter and fixed to the: body 21 connected. The cage 1? Is symmetrical: formed and has on its opposite side an identical Ämf au with two Kontaktelemenlen. The cage 17 comprises the body made of plastic örundkörper 21 and made of steel Kontaktelernente 22, whereby a largely verschleififreie function ensures: is. Gm dküpe contacted efst aizkörpar cage

Cage segment S segrn © ni bag

Body of the body Kontaktfölement Berührstele föff

Basic body Koniakteiemerit Aysnehmyng Wälzkörper Wiklager innemins vy fekörper Cage

Basic body Kontaktetemefti

Claims

Patentanspräebe

Cage (15, 12, 17} for a rolling bearing (20), <ia "fumft g # t ^ nmfclin« i, that the cage (1, 5, 1: 2, 17} an Orundköi ff (2, 13, 21 } from enem first workpiece f and made of a z eten erkstof Contact * eiemanf (3, 1 _NC: 14, 22), to di reibunge "or stoEbelastetsn Steep of Grimdkörpers (2, 3, 21} are arranged ..

Cage according to claim 1, characterized in that the material is designed to withstand high surface pressures.

Cage according to Anspruoh 1 or 2. characterized gekennzeich et; in that the second material is a metal or an alloy, in particular a stalille alloy or ceramic or a fiber ore fiber or a fiber reinforced material.

A cage according to any one of the preceding claims, d dur ft marked iai € ß _t:; that the first material of which the Gry Dkorper (2, 13, 21) consists, a Kunststofffrnatehal,

Cage according to one of the preceding claims, thereby signifying that the body (2, 13, 21) consisting of the first material has contact with the particles (3, 1, _5, 14, 22) or the ontakf elements 10, 14, 22) are pressed or pressed or glued or clipped or screwed,

Kifig according to one of the preceding claims, "taduroh gk rnt lelc oet: that the Kontaktetemente (10) are selectively mounted on the base body and project from a Öbeffllche the body. Cage according to one of the requirements 1 kW

that a Kentakteieme (14) is annular and surrounds a recess (15) or pocket for a Wilzkörper (16)

^'Kafi - after a dr Änspräohe 1 to §, adursh -gske-n xe seframe that a Kontäktelement (22) and an annular Trained det Änlaufring on one or both of the ÄxiaJseien .Käfigs arranged (1?)

Cage according to one of the preceding claims, characterized in that the oven J rpef (2, 13, 21) comprises a plurality of cage segments juxtaposed in a circumferential direction, a cage surface between adjacent cage segments comprising at least one container efement (2, 13, 21). 3 ,. 1 ^_'0? 14, 22)

Rolling bearing, comprising a nnenhng _; an awning, and a wife-corpse, aaa-pyrrh, arranged in pockets or on the underside of a cage

it has a cage (1, 5, 12, 17) according to one of claims 1 to 9.