SE186385C1

SE186385C1 -

Info

Publication number: SE186385C1
Authority: SE
Publication date: 1963-01-01

Description

Uppfinnare: K S Vernon Denna uppfinning avser en tatningsring, avsedd att monteras i ett ringspar i det ena av tva i forhallande till varandra roterande element, t. ex. den yttre och den inre ringen hos ett rullningslager, for att tillsluta mellanrummet mellan dessa, vilken tatningsring fir en relativt platt och tunn, i ett stycke framstalld plastring. Inventor: K S Vernon This invention relates to a sealing ring, intended to be mounted in a pair of rings in one of two in relation to mutually rotating elements, e.g. the outer and the inner ring of a rolling bearing, to close the space between them, which sealing ring has a relatively flat and thin, one-piece plastic ring.

Narmare bestamt galler uppfinningen tatningsringens montering on kvarhallande i ringsparet, varvid det kfinnetecknande fir att en obruten kantdel av densamma, som ar avsedd att anbringas i sparet, Sr tunnare och darigenom elastiskt deformerbar i avsevart hogre grad an den invicIliggande delen av ringen for att vid monteringen deformeras till ombojd form med sin genom ombojningen konvexa sidoyta i anliggning i sparet och sin fria kant under tangentialspanning Vanligen fir det tatningsringens yttre kantdel, som pa detta satt anbringas i ett ring-spar i en yttre lagerdel eller liknande, och i ett typiskt utforande har da denna yttre kantdel i fritt tillstand U-profil, oppen at den ena sidan, och deformeras vid monteringen genom inbojning av U-profilens fria skankel med minskrting av ringens ytterdiameter, vii-ken alltsa 1 spanningsfritt tillstand skall vara nagot stone an bottendiametern av sparet, i vilket ringen monteras. More particularly, the invention relates to the mounting of the sealing ring retaining in the pair of rings, wherein it is characterized in that an unbroken edge part thereof, which is intended to be applied in the groove, is thinner and thereby elastically deformable to a considerably higher degree than the inner part of the ring deformed into a bent shape with its convex side surface abutting in the groove and its free edge under tangential tension Usually for the outer edge part of the sealing ring, which is then applied in a ring groove in an outer bearing part or the like, and in a typical embodiment has since this outer edge part in free condition U-profile, open on one side, and deformed during assembly by bending the free shank of the U-profile with reduction of the outer diameter of the ring, which means that 1 tension-free condition must be somewhat stone at the bottom diameter of the groove , in which the ring is mounted.

I ett annat utforande ar kantdelen redan i fritt tillstand ombojd for att ge ringen en rundad ytterkant, som vid monteringen tryckes in elastiskt till mindre diameter och darvid kommer i det spanningstillstand, som fordras for att kvarhalla ringen stadigt i sparet. In another embodiment, the edge part is already bent in the free state to give the ring a rounded outer edge, which during assembly is pressed in elastically to a smaller diameter and thereby enters the state of tension required to hold the ring firmly in the groove.

Pet material, av vilket tatningsringen framstalles, kan variera och valj es alit efter de forhallanden, under vilka ringen skall anvandas, och speciellt med hansyn till den tempera-fur, for vilken den utsattes. Lampliga mate- Dupl. kl. 47 f: 22/8 rial aro polyeten, nylon, cellulosaacetat och cellulosaacetobutyrat. The material from which the sealing ring is made can vary and be selected according to the conditions under which the ring is to be used, and especially with regard to the temperature to which it is subjected. Lampliga mate- Dupl. at 47 f: 22/8 rial aro polyethylene, nylon, cellulose acetate and cellulose acetobutyrate.

Uppfinningen beskrives narmare harnedan under hanvisning till bifogad ritning. Fig. 1 visar en axialsektion genom ett kullager med en tatningsring enligt uppfinningen pa sin plats vid den ena sidan och en liknande ring uttagen frau den andra sidan. Fig. 2 visar en sektion, liknande fig. 1 men med tatningsringar, som endast tjana som dammskydd och joke ha tatande kontakt. Fig. 3 visar schematiskt ett annat utforande av tatningsringen, varvid denna visas dels spanningsfri, dels under spanning. Fig. 4 visar ytterligare ett annat mojligt utforande. The invention is described in more detail below with reference to the accompanying drawing. Fig. 1 shows an axial section through a ball bearing with a sealing ring according to the invention in place at one side and a similar ring removed from the other side. Fig. 2 shows a section, similar to Fig. 1 but with sealing rings, which only serve as a dust cover and joke having a tightening contact. Fig. 3 schematically shows another embodiment of the sealing ring, this being shown partly stress-free and partly under tension. Fig. 4 shows yet another possible embodiment.

Fig. 1 visar inre och yttre lagerringar 1 resp. 2, kulor 3 och en kulhallare 4. Den yttre lagerringen 2 har nAra vardera sidan ett invandigt ringspar 5, avsett att i sig upptaga ytterkanten av en tatningsring. Den vanstra tatningsringen i figuren visas pa sin plats i sparet 5, medan den hogra visas uttagen ur sitt spar. Fig. 1 shows inner and outer bearing rings 1 resp. 2, balls 3 and a ball holder 4. The outer bearing ring 2 has on each side an inner pair of rings 5, intended to receive the outer edge of a sealing ring. The left sealing ring in the figure is shown in its place in the groove 5, while the right one is shown removed from its groove.

Vardera tatningsringen ar en i ett stycke av enbart plast utformad ring med platt profil, framstalld av ett eller annat av de ovan uppraknade materialen. Den har en huvuddel, som bildar en ringformig, styv zon 6, en a-vtunnad inre zon 7, som slutar med en bojlig tatande lapp 8, och en relativt tunn yttre zon 9 med U-profil, som samverkar med sparet 5. DA ringen ar spanningsfri, sasom den hogra i fig. 1, har den nagot storm yttre diameter An bottnen av sparet 5, sa att vid ring-ens anbringande i sparet den yttersta zonen, namligen U-profilkanten av ringen, blir nagot deformerad, sasom framgar av en jamforelse mellan de hada ringarna i fig. 1. Each sealing ring is a one-piece plastic-only ring with a flat profile, made of one or another of the materials listed above. It has a main part, which forms an annular, rigid zone 6, an a-thinned inner zone 7, which ends with a flexible padding patch 8, and a relatively thin outer zone 9 with a U-profile, which cooperates with the spar 5. DA the ring is stress-free, as shown in Fig. 1, it has a slightly outer outer diameter at the bottom of the groove 5, so that when the ring is placed in the groove the outermost zone, namely the U-profile edge of the ring, becomes slightly deformed, as shown of a comparison between the hada rings in Fig. 1.

Denna lilla deformation av ringen resulterar i en radiell spanning hos ringen i dess helhet och tjanar till att halla kvar ringen pa dess plats i sparet med den styva zonen 6 kvar- 2— — blivande 1 samma plan trots fOrekommande mindre axiell forskjutning av den tatande lappen 8 genom kontakttrycket mot en halkal i den inre lagerringen 1. Inga extra stodringar behovas, utan tatningsringen kvarhalles sakert och effektivt och är anda latt att Mta in och taga ut. This small deformation of the ring results in a radial tension of the ring as a whole and serves to keep the ring in its place in the groove with the rigid zone 6 remaining in the same plane despite the occurrence of less axial displacement of the mounting patch. 8 through the contact pressure against a slippery surface in the inner bearing ring 1. No extra support rings are needed, but the sealing ring is retained securely and efficiently and is easy to insert and remove.

I fig. 2 visas en ring, som anvandes endast som dammskydd till skillnad Iran en ring, som tatar for smorjmedel. I detta fall finns ingen avtunnad zon 7, utan ringen har parallella sidor och ratvinklig profil vid innerkanten, vilken ligger i ett ratvinkligt spar i lagerringen. Fig. 2 shows a ring which was used only as a dust cover unlike Iran a ring which tars for lubricants. In this case there is no thinned zone 7, but the ring has parallel sides and a steering angle at the inner edge, which lies in a steering angle at the steering ring in the bearing ring.

Fig. 3 visar en modifikation av tatningsringen, vid vilken ringens yttre kantdel 9 redan i fritt tillstand Sr ombojd, sd att den bildar en rundad kant pa tatningsringen och en inatriktad flans. Denna utformning medger saval axiell som radiell kompression, da ringen inflires i sparet 5. En jamforelse mellan de hada ringarna i figuren visar att ring-en, dd den fir pa sin plats i sparet, dr utsatt for spanning i bade den ombojda yttre kantdelen 9 och den inre kantdelen 7. Endera eller vardera av dessa delar kan vara forsedd med ringformiga lister for lokalisering av anliggningstrycket. Fig. 3 shows a modification of the sealing ring, in which the outer edge part 9 of the ring is already bent in the free state, so that it forms a rounded edge of the sealing ring and a misaligned flange. This design allows both axial and radial compression, as the ring is embedded in the groove 5. A comparison between the hated rings in the figure shows that the ring, when it moves into place in the groove, is subjected to tension in both the bent outer edge part 9 and the inner edge portion 7. Either or each of these portions may be provided with annular strips for locating the abutment pressure.

Fig. 4 visar slutligen tatningsringen med en tunn yttre zon 10, som i fritt tillstand Sr plan men vid ringens anbringande i dess spar blir ombojd, sasom visas. Fig. 4 finally shows the sealing ring with a thin outer zone 10, which in the free state is flat, but when the ring is fitted in its groove is bent, as shown.

De har beskrivna tatningsringarna kunna tillverkas mycket billigt i star skala, och vid anvandning till tatning av rullningslager erbjuda de alla onskade fordelar, som kunna uppnas med forut kanda metallforstarkta tatningsringar. For att fa sarskilt god ta.tningsformaga kan ringen ha en huvuddel av hardare konsistens an sjalva den tatande lappen for att lattare motsta distorsion, da ringen spannes mellan ett par metalldelar vid monteringen. The sealing rings described can be manufactured very cheaply on a star scale, and when used for sealing rolling bearings, they offer all the desired advantages, which can be achieved with prior art metal-reinforced sealing rings. In order to obtain a particularly good sealing shape, the ring can have a main part of a harder consistency than the sealing patch itself in order to more easily resist distortion, as the ring is clamped between a pair of metal parts during assembly.

I samtliga fall fir det anvanda materialets elasticitet tillracklig f6r att sakerstalla tillrackligt tatningstryck utan behov av gOrdelfjadrar eller andra hjalpmedel. In all cases, the elasticity of the material used is sufficient to ensure sufficient sealing pressure without the need for belt springs or other aids.

Claims

Patent claim:

Sealing ring, intended to be mounted in a pair of rings in one of two in relation to mutually rotating elements, e.g. the outer and the inner ring of a rolling bearing, in order to close the space between them, which sealing ring is a relatively flat and thin, one-piece plastic ring, characterized in that an unbroken edge portion (9, 10) thereof, which is intended to be fitted in the recess, is thinner and thereby elastically deformable to a considerably higher degree than the adjacent part (6) of the ring to be deformed to a bent shape during assembly with its convex side surface abutting in the recess and its free edge under tangential tension.

Sealing ring according to patent claim 1, characterized in that the edge part (9) in the free condition has a U-profile, open on one side of the ring. Request Publications: U.S. Patent Nos. 2,743,119, 2,887,330.