multi多片式离合器

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1、Multi-plateClutch(Automobile)24.8.Multi-plateClutchAmulti-plateclutchhasmorethanonedrivenplate.Althoughthistypeofclutchhasbeenwidelyusedoncarsuptoabout1930,theseveraladvantagesofthesingle-plateclutch,specificallyitsabilitytocompletelydisengagethedrivehascausedaveryrareuseofamulti-pl

2、ateunitasamaintransmissionclutchinstalledbetweentheengineandgearbox.However,amulti-platetypeofclutchfindsauseinautomaticgearboxes.Inthesegearboxes,anumberofclutchesholdthevariousgearelements,andastheclutchdiameterintheseunitsislimited,amulti-plateclutchissuitable.24.8.1.Multi-plateS

3、pringTypeClutchFigure24.16illustratesthelayoutofamulti-platespringtypeclutch,fittedonearlymotorcars.Acover,boltedtotheflywheel,engagesbymeansofslotswithaseriesoflugsontheouterplates.Thesesteelplatesmaybeplainorfittedwithcorkorfrictionmaterialinsertsandactoninnerplates,splinedtoahub.

4、Thrustspringspushtheplatestogethertoformadrive.Fig.24.16.Multi-platespringtypeclutch.Fortheclutchdisengagement,theendplateiswithdrawntocompressthespringsandreleasetheotherplates.Inthisarrangementitisdifficulttoensurethedisengagementofallplates.Toovercomethisproblemtheplatesareeither

5、dishedorfittedwithsmallspringstopushtheplatesapart.Generallywettypeclutchisusedinautomaticgearboxes,andisoperatedbyapistongovernedbyhydraulicpressure.Sinteredbronzeplatesofpartiallyfusingpowderedbronzeorcompressedpaperareusedinmanydesigns.Theporoussurfaceofthisplatetrapstheoil,topro

6、videlonglifeandsmoothoperation.24.8.2.Multi-plateDiaphragmTypeClutchTheseclutchesbasicallyhavedriveanddrivenplates.Thedriveplatesarenotallowedtorotateindependentlybyusinginterlockinglugsandslots,whichdonotpermitrelativerotationalspin,butaxialmovement.Thedrivenplatesaremountedonthein

7、ternallysplinedhubs,whichsplinesonthegearboxspigotshaft(Fig.24.17).Adishedannulardiscformsthediaphragmspring,theinnerportionofwhichisradiallyslottedandtheouterendsareenlargedwithacircularholetopreventstressconcentrationduringdisengagement.Theseradialslotsdividethediscintonumberofrel

8、easelevers.Ashoulde