DK153601B

DK153601B - BODY NAMES FOR PUTTING ON A SHAFT

Info

Publication number: DK153601B
Application number: DK537778AA
Authority: DK
Inventors: Gert Hecht
Original assignee: Siemens Ag
Priority date: 1977-12-29
Filing date: 1978-11-30
Publication date: 1988-08-01
Also published as: SE7812650L; NO784375L; NL184701B; BE873074A; SE434873B; ATA795978A; AT374895B; NL184701C; FR2413579B1; DK537778A; GB2011582B; FR2413579A1; GB2011582A; DK153601C; NL7810898A; DE2758669C2; BR7808587A; MX148717A; IT1101313B; DE2758669B1

Description

- 1 -- 1 -

DK 153601BDK 153601B

Opfindelsen angår et formstofnav til påstikning på en aksel og med en i nærheden af akselboringen indføjet metaldel/ som ved hjælp af et fastgørelseselement kan bringes i medbringerforbindelse med akslen.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a plastic hub for attachment to a shaft and with a metal part inserted in the vicinity of the shaft bore which can be brought into engagement with the shaft by means of a fastening element.

Ved en kendt/ til et blæserhjul til en oliebrænder bestemt med-5 bringerforbindelse (DE-fremlæggelsesskrift 1 079 271) mellem motorakslen og det af formstof bestående blæserhjul er der i navet indlejret en koncentrisk metalbøsning/ med hvilken blæserhjulet ligger an mod akslen. Til fastgørelse af blæserhjulet på akslen tjener en stilleskrue.At a known / for a blower wheel for an oil burner determined to bring connection (DE disclosure 1 079 271) between the motor shaft and the plastic blower wheel, a concentric metal sleeve / embedded with the blower wheel is embedded in the hub. To fix the fan wheel to the shaft, use a adjusting screw.

Endvidere kendes fra DE-fremlæggelsesskrift 2 132 675 et specielt 10 forstærkningselement til forms tof de le med radialt fra et centrallegeme i dettes plan udgående arme, gennem hvilket kræfterne indføres i form-stofdelene/ og som skal forhindre revnedannelse som følge af høj lokal belastning og anvendes på steder, hvor formstofdele forbindes med andre komponenter ved hjælp af skruer, nitter eller lignende forbindelsesele-15 menter.Furthermore, from DE-presenting specification 2 132 675 a special reinforcing element for molds tof de le is known radially extending from a central body in its plane, through which the forces are introduced into the mold parts / and which are to prevent cracking due to high local load and is used in places where plastic parts are connected to other components by means of screws, rivets or similar connecting elements.

Den foreliggende opfindelse har til opgave at tilvejebringe en i produktionsteknisk og montageteknisk henseende særlig enkel/ driftssikker medbringerforbindelse og kraftoverføring mellem en drivaksel og et derpå påsætteligt formstofnav.The object of the present invention is to provide a particularly simple / reliable carrier connection and power transmission between a drive shaft and a moldable plastic hub, which is particularly in production and assembly technology.

20 Løsningen på denne opgave muliggøres ved en forbindelse af den indledningsvis angivne art ved, at der i formstofnavet er indestøbt eller indesprøjtet mindst én U-formet blikstrimmel med radialt i forhold til akslen rettet grenåbning, i hvilken en med akslen forbundet, tilsvarende medbringerstift kan gribe ind ved påsætningen af formstofna-25 vet.The solution to this task is made possible by a connection of the type indicated by the fact that at least one U-shaped tin strip with a radially directed branch opening in the plastic hub is embedded or injected into which a corresponding carrier pin may engage when applied to the plastic fabric.

Anvendelsen af en blikstrimmel med ϋ-formet tværsnit som forbindelseselement mellem en aksel og et påstukket formstofnav er i og for sig kendt (DE-brugsmønster 75 23 126). Det foreslås imidlertid her, at en ved en bukke- og stansefremgangsmåde fremstillet kile i U-form efter 30 påstikningen af navet på akslen skubbes ind i en passende, i formstofnavet forud frembragt not og til dette formål griber ind i radiale noter i akslen med sine radialt i forhold til akslen rettede grene. På kilegren- og kilebjælkesiderne er der ved hjælp af indsnit eller udstansninger tildannet næser. Efter indskubningen af kilen i navets not 35 ombukkes en første sidevendt næse nedad i en rundtgående radialnot på - 2 -The use of a tin strip of ϋ-shaped cross-section as a connecting element between a shaft and a molded plastic hub is known per se (DE usage pattern 75 23 126). However, it is suggested here that a U-shaped wedge produced in a bending and punching method after insertion of the hub on the shaft be pushed into a suitable groove formed in the plastic hub and for this purpose engage radial grooves in the shaft with its radially in relation to the shaft directed branches. Noses are formed on the wedge branch and wedge beam sides by means of incisions or punches. After pushing the wedge into the groove of the hub, a first lateral nose is folded downwardly in a circular radial groove of - 2 -

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akslen og derpå yderligere næser opad mod navendefladerne for således at kunne fiksere kile og nav i forhold til akslens længderetning.the shaft and then further noses upwardly toward the hub faces so as to be able to fix the wedge and hub relative to the longitudinal direction of the shaft.

Der kendes også allerede en drejningssikret holdeanordning til formstofkomponenter på en aksle ved hjælp af en not-stift-forbindelse, 5 hvor en radialt over akslen udstående stift griber ind i grenåbningen i en U-formet nut i formstofdelen (DE-offentliggørelsesskrift 26 11 882 eller DE-brugsmønster 18 80 980). I de kendte tilfælde ligger stiften i den U-formede not imidlertiddirekte an mod den formstofdel, som skal medføres.Also known is a torque-retaining device for plastic components on a shaft by means of a groove-pin connection, 5 in which a radially protruding over the shaft engages the branch opening in a U-shaped nut in the plastic part (DE publication no. 26 11 882 or DE usage pattern 18 80 980). In the known cases, however, the pin in the U-shaped groove directly abuts the plastic part to be carried.

10 Det er endvidere kendt ved fastgørelsen af et pumpehjul på en ak sel at støbe pumpehjulet omkring en fastgøringsbøsning (DE-fremlæggel-sesskrift 10 63 036). Da pumpehjulet består af et elastisk materiale/ fx. gummi/ er metalbøsningen tvingende nødvendig.10 It is further known in the case of attaching a impeller to a shaft to cast the impeller around a fastening bush (DE disclosure 10 63 036). Since the impeller consists of an elastic material / e.g. rubber / is the metal bushing imperative.

De ved det påstikkelige formstofnav ifølge opfindelsen som enkle 15 bukke- og stansedele fremstillelige blikstrimler kan på enkel måde ind-støbes under støbningen eller sprøjtningen af formstofnavet og sikrer efter afkøling af formstofmassen en sikker fastholdelse i formstofnavet og efter den enkle påstikning på driftsikker måde en stor kraft- og drejningsmomentoverføring mellem den mod blikstrimlen liggende medbrin-20 gerstift og hele formstofnavet uden risiko for en lokal overbelastning af formstofnavet i det umiddelbare område omkring medbringerstiften.The tin strips manufactured by the stubborn plastic hub according to the invention as simple 15 bending and punching strips can be easily embedded during the molding or spraying of the plastic hub and after cooling of the plastic mass ensures a secure retention in the plastic hub and after the simple stitching in a reliable manner. force and torque transfer between the carrier pin and the entire plastic hub without the risk of a local overload of the plastic hub in the immediate area around the carrier pin.

En yderligere sikring af fastholdelsen af de medindstøbte U-formede blikstrimler kan opnås ved, at de mod akselboringen vendende endekanter af de U-formede blikstrimlers grenender er medindstøbt til til-25 vejebringelse af en radialt formmæssig fastholdelse. Formstofnavet kan ved hjælp af de U-formede blikstrimler samtidig på fordelagtig måde ved risikoløs kraftindføring fikseres aksialt ved, at de U-formede blikstrimler strækker sig over hele formstofnavets aksiale længde, så at der mod deres ender kan fastskrues blikskiver til aksialfiksering på 30 akslen.Further securing of the retention of the co-molded U-shaped tin strips can be achieved by the end edges facing the shaft bore of the U-shaped tin strips' branch ends being co-molded to provide a radially shaped retaining. The plastic hub can be axially fixed axially by means of the U-shaped tin strips, without risk introduction, by the U-shaped tin strips extending over the entire axial length of the plastic hub, so that tinplates for axial fixation can be screwed onto the shaft.

Til yderligere sikring af de U-formede blikstrimler i det derom støbte formstofnav er der ifølge en videre udformning af opfindelsen anbragt vægåbninger i blikstrimlerne, i hvilke der ved støbningen af navet også indstøbes formstof til opnåelse af en yderligere formmæssig 35 forankring. Til opnåelse af en tast aflukning mellem formstofnavet og - 3 -To further secure the U-shaped tin strips in the molded mold hub, wall openings according to a further embodiment of the invention are provided in the tin strips, in which molding of the hub is also molded to obtain a further molding anchorage. To obtain a key closure between the plastic hub and - 3 -

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akslen, også ud for blikstrimlerne, kan det være hensigtsmæssigt, at disse ved støbningen af formstofnavet uden for det ved påstikningen fremkommende indgrebsområde for medbringerstiften over et aksialt delområde er udstøbt med en formstoflukkeprop, som strækker sig til aksel-5 boringen. Indstøbningen af denne lukkeprop sker hensigtsmæssig gennem en i blikstrimlerne i og for sig allerede tilstedeværende vægåbning til yderligere formmæssig forankring. Hertil foreslås ifølge en videre udformning, at der ved indgreb af medbringerstiften uden for midten ved de U-formede blikstrimlers aksiale midterområde er anbragt en åbning i 10 deres fra akslen bortvendende topbue, gennem hvilken åbning der ved indstøbningen af blikstrimlerne i formstofnavet samtidig er støbt en formstoftunge, som strækker sig til akselboringen, og som er tilsluttet til blikstrimlernes indervaegge. Derved forhindres fx. ved en udvendig aksialventilator med lodret stående aksel, at der udefra trænger fug-15 tighed ind langs akslen gennem det indre område af de U-formede blikstrimler og fx. beskadiger fugtighedsfølsomme leje- og motordele. Når formstoftungen er anbragt i midten, er navet desuden uafhængigt af den aksiale påstikningsretning på akslen.the shaft, also adjacent to the tin strips, it may be convenient that, when casting the plastic hub outside the engaging region of the driver pin over an axial sub-region, they are molded with a plastic closure plug extending to the shaft bore. The molding of this closure plug is conveniently done through a wall opening already present in the tin strips, per se, for further formal anchoring. To this end, according to a further embodiment, it is proposed that by engaging the carrier pin outside the center at the axial medial region of the U-shaped strips, an aperture is provided in their top arc which extends away from the shaft, through which an opening is simultaneously molded into the molding hub by plastic tongue extending to the shaft bore and connected to the inner walls of the tin strips. This prevents e.g. by an exterior axial fan with vertical shaft, that moisture from the outside penetrates along the shaft through the inner region of the U-shaped tin strips and e.g. damages moisture-sensitive bearing and engine parts. Furthermore, when the mold tongue is positioned in the middle, the hub is independent of the axial insertion direction of the shaft.

Opfindelsen er nærmere forklaret i det følgende under henvisning 20 til tegningen, på hvilken fig. 1 viser et aksialt længdesnit af et på en motoraksel påsat formstofnav i et ventilatorhjul, fig. 2 det i fig. 1 viste nav, set fra enden.The invention is further explained in the following with reference to the drawing, in which 1 shows an axial longitudinal section of a plastic hub mounted on a motor shaft in a fan wheel; FIG. 2 shows the embodiment of FIG. 1, seen from the end.

Som vist i fig. 1, er der på enden af en aksel 1 i en motor 9 fra 25 højre side påstukket et formstofnav 4 for skovlhjulet i en aksialven-tilator, af hvilken to på formstofnavet 4 påstøbte ventilatorskovle 43, 44 er delvis vist på tegningen. I formstofnavet 4 er i nærheden af dets akselboring støbt to langs akselboringens omkreds 180* indbyrdes forsatte U-formede blikstrimler 2, 3 med ind i navet. De U-formede blik-30 strimler 2, 3 er endvidere således anbragt, at deres grenflader 21, 22 henholdsvis 31, 32 er rettet aksialt og deres grenåbning 23 henholdsvis 33 er rettet radialt i forhold til motoren 9's aksel 1. Gennem akslen 1 er stukket en medbringerstift 5, som med sine fra akselomkredsen radialt udragende ender 51 henholdsvis 52 griber korresponrende ind i de U-35 formede blikstrimler 2 og 3's grenåbninger 23 og 33 efter på stikningen - 4 - DK 1536018 af formstofnavet 4 på enden af akslen. Bredden af grenåbningerne 23 og 33 i de U-formede blikstrimler 2, 3 er således afpasset efter diameteren af den indgribende medbringerstift, at der såvidt muligt opnås en løs pasning.As shown in FIG. 1, on the end of a shaft 1 in a motor 9 from the right-hand side, a plastic hub 4 for the impeller wheel is mounted in an axial fan, of which two fan blades 43, 44 cast on the plastic hub 4 are shown in the drawing. In the plastic hub 4, in the vicinity of its shaft bore, two molded U-shaped tin strips 2, 3 spaced apart along the circumference of the shaft bore are cast into the hub. The U-shaped tin strips 2, 3 are further arranged such that their branches 21, 22 and 31, 32 are directed axially and their branch opening 23 and 33 respectively are radially directed with respect to the shaft 1 of the motor 9. inserted a carrier pin 5 which, with its radially projecting ends 51 and 52 respectively, radially engages the branch openings 23 and 33 of the U-35-shaped tin strips 2 and 3 on the stitching - 4 - DK 1536018 of the plastic hub 4 at the end of the shaft. The width of the branch openings 23 and 33 in the U-shaped tin strips 2, 3 is so adapted to the diameter of the engaging driver pin that a loose fit is obtained as far as possible.

5 Som det navnlig fremgår af fig. 2, rækker de mod akselboringen vendende kantflader af grenenderne af de U-formede blikstrimler 2 og 3 ikke umiddelbart ind til akselboringen, men er med henblik på en radial formmæssig fastholdelse også omstøbt med formstof, således at blikstrimlerne hindres i en forskydning hen mod akselboringsåbningen, selv-10 om de ellers ikke fastholdes af det omgivende formstofnav ved formmæs-sig eller kraftmæssig forbindelse.5 As can be seen in particular from FIG. 2, the edge faces facing the shaft bore of the branch ends of the U-shaped tin strips 2 and 3 do not immediately reach into the shaft bore, but are also molded with plastic for a radial shape retention, so that the tin strips are prevented in a displacement towards the shaft bore opening. although they are otherwise not retained by the surrounding plastic hub by molding or forceful connection.

De U-formede blikstrimler 2, 3 strækker sig over hele formstofnavet 4's aksiale længde. Til aksialfiksering af formstofnavet 4 og dermed af hele ventilatorhjulet på akslen 1 ligger ventialtorhjulet ved 15 sin venstre side under mellemlæg af en akselskive 7 an mod en akselansats 10 og kan ved sin højre side under mellemlæg af en yderligere akselskive 6 trykkes fast mod akselansatsen 10 ved hjælp af en skrue 8. Hensigtsiæessigt ligger blikskiverne 6, 7 an mod enderne af de over hele formstofnavet 4' s aksiale længde forløbende blikstrimler 2, 3, så at 20 der med henblik på den aksiale fiksering er sikkerhed for en kraftind-føring til bliklaskerne uden risiko for en beskadigelse af selve formstofnavet.The U-shaped tin strips 2, 3 extend over the axial length of the entire plastic hub 4. For axial fixation of the plastic hub 4 and thus of the entire fan wheel on the shaft 1, the vential torque wheel lies at its left side under the shaft of a shaft disc 7 against a shaft shoulder 10 and at its right side under the shaft of an additional shaft disk 6 can be pressed firmly against the shaft shoulder 10 at by means of a screw 8. Conveniently, the washers 6, 7 abut against the ends of the axial length extending across the axial length of the plastic hub 4, 3, so that for the axial fixation, a force is applied to the canisters. without risk of damage to the plastic hub itself.

Da medbringerstiften 5 griber ind til venstre for navets midte, er der ved den aksiale midte af de U-formede blikstrimler 2, 3 udformet en 25 åbning 26 henholdsvis 36 i strimlernes fra akslen bortvendende topbue, og gennem disse åbninger er der ved indstøbningen af blikstrimlerne i formstofnavet samtidig støbt en formstoftunge 41 henholdsvis 42, som strækker sig til akselboringen og ligger an mod blikstrimlernes indersider 21, 22, henholdsvis 31, 32. På denne måde opnås på støbeteknisk 30 gunstig (lunkefri) måde en formmæssig yderligere sikring af blikstrimlerne 2, 3 samtidig med at den på grund af de U-formede blikstrimler fremkommende "aksiale udhuling" af formstofnavet 4 uden for medbringerstiften 5*s indgrebsområde aftættes således, at der fx. ikke kan trænge fugtighed igennem, navnlig ved lodret anbringelse af aksialblæseren.As the carrier pin 5 engages to the left of the center of the hub, at the axial center of the U-shaped tin strips 2, 3, an opening 26 and 36 respectively in the top arch of the strips facing away from the shaft are formed, and through these openings there is at the molding of the tin strips. in the plastic hub a molding tongue 41 and 42, respectively, which extends to the shaft bore and abut against the inner sides of the tin strips 21, 22 and 31, 32, respectively, is molded. In this way, in a casting technique 30 a favorable (lukewarm) manner is obtained, a further formally secure of the tin strips 2, 3 at the same time as the "axial erosion" of the plastic hub 4 outside the carrier pin 5 * s area of engagement due to the U-shaped eye strips is sealed so that e.g. can not penetrate moisture, especially by vertical application of the axial fan.

3535

Claims

1. Plastic hub for mounting on a shaft and with a metal part inserted in the vicinity of the shaft bore which can be brought into contact with the shaft by means of a fastening element, characterized in that at least one U is embedded or injected into the plastic hub (4). -shaped tin strip (2, 3) having a radially directed branch opening (23, 33) in which a corresponding carrier pin (5) connected to the shaft may engage in the application of the plastic hub (4).

Plastic hub according to claim 1, characterized in that two tin strips (2, 3) are arranged which are 180 * spaced apart along the circumference of the shaft bore and in which radially directed branch openings (23 and 33, respectively) one through the shaft ( 1) pruned corresponding carrier pin (5) may engage each of its ends projecting radially from the shaft circumference (51, 52).

Plastic hub according to claim 1 or 2, characterized in that the end edges of the U-shaped tin strips (2, 3) facing the shaft bore are molded with plastic.

Plastic hub according to claims 1 to 3, characterized in that the U-shaped tin strips (2, 3) extend over the axial length of the entire plastic hub (4) and that tin plates (6, 7) can be screwed against their axial end surfaces. ) for axially fixing the plastic hub (4) on the shaft (1).

Plastic hub according to any one of claims 1 to 4, characterized in that the U-shaped tin strips (2, 3) are provided with wall openings in which plastic is embedded.

Plastic hub according to any one of claims 1-5, characterized in that the U-shaped tin strips (2, 3) outside the engagement area of the carrier pin (5) are molded over an axial sub-region with a plastic closure extending to the shaft bore.

Molding hub according to claim 6, characterized in that at the axial center of the U-shaped tin strips (2, 3) an aperture (26 and 36, respectively) is formed in the top arch facing away from the shaft (1). of the tin strips (2, 3) in the plastic hub (4) is simultaneously molded a mold tongue (41, 42) which extends to the shaft bore and joins the inner walls (21, 22 and 31, 32, respectively) of the tin strips ( 2, 3).

Use of plastic hub according to any one of claims 1-7, characterized in that it is used as a carrier connection between a plastic fan wheel in an axial fan and the motor shaft of a driving electric motor. 10